reinstall

1 files changed, 0 insertions, 4550 deletions

diff --git a/openssl/ssl/t1_lib.c b/openssl/ssl/t1_lib.c
deleted file mode 100644
index e60c88b..0000000
--- a/openssl/ssl/t1_lib.c
+++ /dev/null
@@ -1,4550 +0,0 @@
-/* ssl/t1_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- *    software must display the following acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#include <stdio.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/hmac.h>
-#ifndef OPENSSL_NO_EC
-#ifdef OPENSSL_NO_EC2M
-# include <openssl/ec.h>
-#endif
-#endif
-#include <openssl/ocsp.h>
-#include <openssl/rand.h>
-#include "ssl_locl.h"
-
-const char tls1_version_str[] = "TLSv1" OPENSSL_VERSION_PTEXT;
-
-#ifndef OPENSSL_NO_TLSEXT
-static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen,
-                              const unsigned char *sess_id, int sesslen,
-                              SSL_SESSION **psess);
-static int ssl_check_clienthello_tlsext_early(SSL *s);
-int ssl_check_serverhello_tlsext(SSL *s);
-#endif
-
-#define CHECKLEN(curr, val, limit) \
-    (((curr) >= (limit)) || (size_t)((limit) - (curr)) < (size_t)(val))
-
-SSL3_ENC_METHOD TLSv1_enc_data = {
-    tls1_enc,
-    tls1_mac,
-    tls1_setup_key_block,
-    tls1_generate_master_secret,
-    tls1_change_cipher_state,
-    tls1_final_finish_mac,
-    TLS1_FINISH_MAC_LENGTH,
-    tls1_cert_verify_mac,
-    TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
-    TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
-    tls1_alert_code,
-    tls1_export_keying_material,
-    0,
-    SSL3_HM_HEADER_LENGTH,
-    ssl3_set_handshake_header,
-    ssl3_handshake_write
-};
-
-SSL3_ENC_METHOD TLSv1_1_enc_data = {
-    tls1_enc,
-    tls1_mac,
-    tls1_setup_key_block,
-    tls1_generate_master_secret,
-    tls1_change_cipher_state,
-    tls1_final_finish_mac,
-    TLS1_FINISH_MAC_LENGTH,
-    tls1_cert_verify_mac,
-    TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
-    TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
-    tls1_alert_code,
-    tls1_export_keying_material,
-    SSL_ENC_FLAG_EXPLICIT_IV,
-    SSL3_HM_HEADER_LENGTH,
-    ssl3_set_handshake_header,
-    ssl3_handshake_write
-};
-
-SSL3_ENC_METHOD TLSv1_2_enc_data = {
-    tls1_enc,
-    tls1_mac,
-    tls1_setup_key_block,
-    tls1_generate_master_secret,
-    tls1_change_cipher_state,
-    tls1_final_finish_mac,
-    TLS1_FINISH_MAC_LENGTH,
-    tls1_cert_verify_mac,
-    TLS_MD_CLIENT_FINISH_CONST, TLS_MD_CLIENT_FINISH_CONST_SIZE,
-    TLS_MD_SERVER_FINISH_CONST, TLS_MD_SERVER_FINISH_CONST_SIZE,
-    tls1_alert_code,
-    tls1_export_keying_material,
-    SSL_ENC_FLAG_EXPLICIT_IV | SSL_ENC_FLAG_SIGALGS | SSL_ENC_FLAG_SHA256_PRF
-        | SSL_ENC_FLAG_TLS1_2_CIPHERS,
-    SSL3_HM_HEADER_LENGTH,
-    ssl3_set_handshake_header,
-    ssl3_handshake_write
-};
-
-long tls1_default_timeout(void)
-{
-    /*
-     * 2 hours, the 24 hours mentioned in the TLSv1 spec is way too long for
-     * http, the cache would over fill
-     */
-    return (60 * 60 * 2);
-}
-
-int tls1_new(SSL *s)
-{
-    if (!ssl3_new(s))
-        return (0);
-    s->method->ssl_clear(s);
-    return (1);
-}
-
-void tls1_free(SSL *s)
-{
-#ifndef OPENSSL_NO_TLSEXT
-    if (s->tlsext_session_ticket) {
-        OPENSSL_free(s->tlsext_session_ticket);
-    }
-#endif                          /* OPENSSL_NO_TLSEXT */
-    ssl3_free(s);
-}
-
-void tls1_clear(SSL *s)
-{
-    ssl3_clear(s);
-    s->version = s->method->version;
-}
-
-#ifndef OPENSSL_NO_EC
-
-static int nid_list[] = {
-    NID_sect163k1,              /* sect163k1 (1) */
-    NID_sect163r1,              /* sect163r1 (2) */
-    NID_sect163r2,              /* sect163r2 (3) */
-    NID_sect193r1,              /* sect193r1 (4) */
-    NID_sect193r2,              /* sect193r2 (5) */
-    NID_sect233k1,              /* sect233k1 (6) */
-    NID_sect233r1,              /* sect233r1 (7) */
-    NID_sect239k1,              /* sect239k1 (8) */
-    NID_sect283k1,              /* sect283k1 (9) */
-    NID_sect283r1,              /* sect283r1 (10) */
-    NID_sect409k1,              /* sect409k1 (11) */
-    NID_sect409r1,              /* sect409r1 (12) */
-    NID_sect571k1,              /* sect571k1 (13) */
-    NID_sect571r1,              /* sect571r1 (14) */
-    NID_secp160k1,              /* secp160k1 (15) */
-    NID_secp160r1,              /* secp160r1 (16) */
-    NID_secp160r2,              /* secp160r2 (17) */
-    NID_secp192k1,              /* secp192k1 (18) */
-    NID_X9_62_prime192v1,       /* secp192r1 (19) */
-    NID_secp224k1,              /* secp224k1 (20) */
-    NID_secp224r1,              /* secp224r1 (21) */
-    NID_secp256k1,              /* secp256k1 (22) */
-    NID_X9_62_prime256v1,       /* secp256r1 (23) */
-    NID_secp384r1,              /* secp384r1 (24) */
-    NID_secp521r1,              /* secp521r1 (25) */
-    NID_brainpoolP256r1,        /* brainpoolP256r1 (26) */
-    NID_brainpoolP384r1,        /* brainpoolP384r1 (27) */
-    NID_brainpoolP512r1         /* brainpool512r1 (28) */
-};
-
-static const unsigned char ecformats_default[] = {
-    TLSEXT_ECPOINTFORMAT_uncompressed,
-    TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
-    TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
-};
-
-/* The client's default curves / the server's 'auto' curves. */
-static const unsigned char eccurves_auto[] = {
-    /* Prefer P-256 which has the fastest and most secure implementations. */
-    0, 23,                      /* secp256r1 (23) */
-    /* Other >= 256-bit prime curves. */
-    0, 25,                      /* secp521r1 (25) */
-    0, 28,                      /* brainpool512r1 (28) */
-    0, 27,                      /* brainpoolP384r1 (27) */
-    0, 24,                      /* secp384r1 (24) */
-    0, 26,                      /* brainpoolP256r1 (26) */
-    0, 22,                      /* secp256k1 (22) */
-# ifndef OPENSSL_NO_EC2M
-    /* >= 256-bit binary curves. */
-    0, 14,                      /* sect571r1 (14) */
-    0, 13,                      /* sect571k1 (13) */
-    0, 11,                      /* sect409k1 (11) */
-    0, 12,                      /* sect409r1 (12) */
-    0, 9,                       /* sect283k1 (9) */
-    0, 10,                      /* sect283r1 (10) */
-# endif
-};
-
-static const unsigned char eccurves_all[] = {
-    /* Prefer P-256 which has the fastest and most secure implementations. */
-    0, 23,                      /* secp256r1 (23) */
-    /* Other >= 256-bit prime curves. */
-    0, 25,                      /* secp521r1 (25) */
-    0, 28,                      /* brainpool512r1 (28) */
-    0, 27,                      /* brainpoolP384r1 (27) */
-    0, 24,                      /* secp384r1 (24) */
-    0, 26,                      /* brainpoolP256r1 (26) */
-    0, 22,                      /* secp256k1 (22) */
-# ifndef OPENSSL_NO_EC2M
-    /* >= 256-bit binary curves. */
-    0, 14,                      /* sect571r1 (14) */
-    0, 13,                      /* sect571k1 (13) */
-    0, 11,                      /* sect409k1 (11) */
-    0, 12,                      /* sect409r1 (12) */
-    0, 9,                       /* sect283k1 (9) */
-    0, 10,                      /* sect283r1 (10) */
-# endif
-    /*
-     * Remaining curves disabled by default but still permitted if set
-     * via an explicit callback or parameters.
-     */
-    0, 20,                      /* secp224k1 (20) */
-    0, 21,                      /* secp224r1 (21) */
-    0, 18,                      /* secp192k1 (18) */
-    0, 19,                      /* secp192r1 (19) */
-    0, 15,                      /* secp160k1 (15) */
-    0, 16,                      /* secp160r1 (16) */
-    0, 17,                      /* secp160r2 (17) */
-# ifndef OPENSSL_NO_EC2M
-    0, 8,                       /* sect239k1 (8) */
-    0, 6,                       /* sect233k1 (6) */
-    0, 7,                       /* sect233r1 (7) */
-    0, 4,                       /* sect193r1 (4) */
-    0, 5,                       /* sect193r2 (5) */
-    0, 1,                       /* sect163k1 (1) */
-    0, 2,                       /* sect163r1 (2) */
-    0, 3,                       /* sect163r2 (3) */
-# endif
-};
-
-static const unsigned char suiteb_curves[] = {
-    0, TLSEXT_curve_P_256,
-    0, TLSEXT_curve_P_384
-};
-
-# ifdef OPENSSL_FIPS
-/* Brainpool not allowed in FIPS mode */
-static const unsigned char fips_curves_default[] = {
-#  ifndef OPENSSL_NO_EC2M
-    0, 14,                      /* sect571r1 (14) */
-    0, 13,                      /* sect571k1 (13) */
-#  endif
-    0, 25,                      /* secp521r1 (25) */
-#  ifndef OPENSSL_NO_EC2M
-    0, 11,                      /* sect409k1 (11) */
-    0, 12,                      /* sect409r1 (12) */
-#  endif
-    0, 24,                      /* secp384r1 (24) */
-#  ifndef OPENSSL_NO_EC2M
-    0, 9,                       /* sect283k1 (9) */
-    0, 10,                      /* sect283r1 (10) */
-#  endif
-    0, 22,                      /* secp256k1 (22) */
-    0, 23,                      /* secp256r1 (23) */
-#  ifndef OPENSSL_NO_EC2M
-    0, 8,                       /* sect239k1 (8) */
-    0, 6,                       /* sect233k1 (6) */
-    0, 7,                       /* sect233r1 (7) */
-#  endif
-    0, 20,                      /* secp224k1 (20) */
-    0, 21,                      /* secp224r1 (21) */
-#  ifndef OPENSSL_NO_EC2M
-    0, 4,                       /* sect193r1 (4) */
-    0, 5,                       /* sect193r2 (5) */
-#  endif
-    0, 18,                      /* secp192k1 (18) */
-    0, 19,                      /* secp192r1 (19) */
-#  ifndef OPENSSL_NO_EC2M
-    0, 1,                       /* sect163k1 (1) */
-    0, 2,                       /* sect163r1 (2) */
-    0, 3,                       /* sect163r2 (3) */
-#  endif
-    0, 15,                      /* secp160k1 (15) */
-    0, 16,                      /* secp160r1 (16) */
-    0, 17,                      /* secp160r2 (17) */
-};
-# endif
-
-int tls1_ec_curve_id2nid(int curve_id)
-{
-    /* ECC curves from RFC 4492 and RFC 7027 */
-    if ((curve_id < 1) || ((unsigned int)curve_id >
-                           sizeof(nid_list) / sizeof(nid_list[0])))
-        return 0;
-    return nid_list[curve_id - 1];
-}
-
-int tls1_ec_nid2curve_id(int nid)
-{
-    /* ECC curves from RFC 4492 and RFC 7027 */
-    switch (nid) {
-    case NID_sect163k1:        /* sect163k1 (1) */
-        return 1;
-    case NID_sect163r1:        /* sect163r1 (2) */
-        return 2;
-    case NID_sect163r2:        /* sect163r2 (3) */
-        return 3;
-    case NID_sect193r1:        /* sect193r1 (4) */
-        return 4;
-    case NID_sect193r2:        /* sect193r2 (5) */
-        return 5;
-    case NID_sect233k1:        /* sect233k1 (6) */
-        return 6;
-    case NID_sect233r1:        /* sect233r1 (7) */
-        return 7;
-    case NID_sect239k1:        /* sect239k1 (8) */
-        return 8;
-    case NID_sect283k1:        /* sect283k1 (9) */
-        return 9;
-    case NID_sect283r1:        /* sect283r1 (10) */
-        return 10;
-    case NID_sect409k1:        /* sect409k1 (11) */
-        return 11;
-    case NID_sect409r1:        /* sect409r1 (12) */
-        return 12;
-    case NID_sect571k1:        /* sect571k1 (13) */
-        return 13;
-    case NID_sect571r1:        /* sect571r1 (14) */
-        return 14;
-    case NID_secp160k1:        /* secp160k1 (15) */
-        return 15;
-    case NID_secp160r1:        /* secp160r1 (16) */
-        return 16;
-    case NID_secp160r2:        /* secp160r2 (17) */
-        return 17;
-    case NID_secp192k1:        /* secp192k1 (18) */
-        return 18;
-    case NID_X9_62_prime192v1: /* secp192r1 (19) */
-        return 19;
-    case NID_secp224k1:        /* secp224k1 (20) */
-        return 20;
-    case NID_secp224r1:        /* secp224r1 (21) */
-        return 21;
-    case NID_secp256k1:        /* secp256k1 (22) */
-        return 22;
-    case NID_X9_62_prime256v1: /* secp256r1 (23) */
-        return 23;
-    case NID_secp384r1:        /* secp384r1 (24) */
-        return 24;
-    case NID_secp521r1:        /* secp521r1 (25) */
-        return 25;
-    case NID_brainpoolP256r1:  /* brainpoolP256r1 (26) */
-        return 26;
-    case NID_brainpoolP384r1:  /* brainpoolP384r1 (27) */
-        return 27;
-    case NID_brainpoolP512r1:  /* brainpool512r1 (28) */
-        return 28;
-    default:
-        return 0;
-    }
-}
-
-/*
- * Get curves list, if "sess" is set return client curves otherwise
- * preferred list.
- * Sets |num_curves| to the number of curves in the list, i.e.,
- * the length of |pcurves| is 2 * num_curves.
- * Returns 1 on success and 0 if the client curves list has invalid format.
- * The latter indicates an internal error: we should not be accepting such
- * lists in the first place.
- * TODO(emilia): we should really be storing the curves list in explicitly
- * parsed form instead. (However, this would affect binary compatibility
- * so cannot happen in the 1.0.x series.)
- */
-static int tls1_get_curvelist(SSL *s, int sess,
-                              const unsigned char **pcurves,
-                              size_t *num_curves)
-{
-    size_t pcurveslen = 0;
-    if (sess) {
-        *pcurves = s->session->tlsext_ellipticcurvelist;
-        pcurveslen = s->session->tlsext_ellipticcurvelist_length;
-    } else {
-        /* For Suite B mode only include P-256, P-384 */
-        switch (tls1_suiteb(s)) {
-        case SSL_CERT_FLAG_SUITEB_128_LOS:
-            *pcurves = suiteb_curves;
-            pcurveslen = sizeof(suiteb_curves);
-            break;
-
-        case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
-            *pcurves = suiteb_curves;
-            pcurveslen = 2;
-            break;
-
-        case SSL_CERT_FLAG_SUITEB_192_LOS:
-            *pcurves = suiteb_curves + 2;
-            pcurveslen = 2;
-            break;
-        default:
-            *pcurves = s->tlsext_ellipticcurvelist;
-            pcurveslen = s->tlsext_ellipticcurvelist_length;
-        }
-        if (!*pcurves) {
-# ifdef OPENSSL_FIPS
-            if (FIPS_mode()) {
-                *pcurves = fips_curves_default;
-                pcurveslen = sizeof(fips_curves_default);
-            } else
-# endif
-            {
-                if (!s->server || s->cert->ecdh_tmp_auto) {
-                    *pcurves = eccurves_auto;
-                    pcurveslen = sizeof(eccurves_auto);
-                } else {
-                    *pcurves = eccurves_all;
-                    pcurveslen = sizeof(eccurves_all);
-                }
-            }
-        }
-    }
-    /* We do not allow odd length arrays to enter the system. */
-    if (pcurveslen & 1) {
-        SSLerr(SSL_F_TLS1_GET_CURVELIST, ERR_R_INTERNAL_ERROR);
-        *num_curves = 0;
-        return 0;
-    } else {
-        *num_curves = pcurveslen / 2;
-        return 1;
-    }
-}
-
-/* Check a curve is one of our preferences */
-int tls1_check_curve(SSL *s, const unsigned char *p, size_t len)
-{
-    const unsigned char *curves;
-    size_t num_curves, i;
-    unsigned int suiteb_flags = tls1_suiteb(s);
-    if (len != 3 || p[0] != NAMED_CURVE_TYPE)
-        return 0;
-    /* Check curve matches Suite B preferences */
-    if (suiteb_flags) {
-        unsigned long cid = s->s3->tmp.new_cipher->id;
-        if (p[1])
-            return 0;
-        if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256) {
-            if (p[2] != TLSEXT_curve_P_256)
-                return 0;
-        } else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384) {
-            if (p[2] != TLSEXT_curve_P_384)
-                return 0;
-        } else                  /* Should never happen */
-            return 0;
-    }
-    if (!tls1_get_curvelist(s, 0, &curves, &num_curves))
-        return 0;
-    for (i = 0; i < num_curves; i++, curves += 2) {
-        if (p[1] == curves[0] && p[2] == curves[1])
-            return 1;
-    }
-    return 0;
-}
-
-/*-
- * Return |nmatch|th shared curve or NID_undef if there is no match.
- * For nmatch == -1, return number of  matches
- * For nmatch == -2, return the NID of the curve to use for
- * an EC tmp key, or NID_undef if there is no match.
- */
-int tls1_shared_curve(SSL *s, int nmatch)
-{
-    const unsigned char *pref, *supp;
-    size_t num_pref, num_supp, i, j;
-    int k;
-    /* Can't do anything on client side */
-    if (s->server == 0)
-        return -1;
-    if (nmatch == -2) {
-        if (tls1_suiteb(s)) {
-            /*
-             * For Suite B ciphersuite determines curve: we already know
-             * these are acceptable due to previous checks.
-             */
-            unsigned long cid = s->s3->tmp.new_cipher->id;
-            if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
-                return NID_X9_62_prime256v1; /* P-256 */
-            if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
-                return NID_secp384r1; /* P-384 */
-            /* Should never happen */
-            return NID_undef;
-        }
-        /* If not Suite B just return first preference shared curve */
-        nmatch = 0;
-    }
-    /*
-     * Avoid truncation. tls1_get_curvelist takes an int
-     * but s->options is a long...
-     */
-    if (!tls1_get_curvelist
-        (s, (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) != 0, &supp,
-         &num_supp))
-        /* In practice, NID_undef == 0 but let's be precise. */
-        return nmatch == -1 ? 0 : NID_undef;
-    if (!tls1_get_curvelist
-        (s, !(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE), &pref,
-         &num_pref))
-        return nmatch == -1 ? 0 : NID_undef;
-
-    /*
-     * If the client didn't send the elliptic_curves extension all of them
-     * are allowed.
-     */
-    if (num_supp == 0 && (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) != 0) {
-        supp = eccurves_all;
-        num_supp = sizeof(eccurves_all) / 2;
-    } else if (num_pref == 0 &&
-        (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) == 0) {
-        pref = eccurves_all;
-        num_pref = sizeof(eccurves_all) / 2;
-    }
-
-    k = 0;
-    for (i = 0; i < num_pref; i++, pref += 2) {
-        const unsigned char *tsupp = supp;
-        for (j = 0; j < num_supp; j++, tsupp += 2) {
-            if (pref[0] == tsupp[0] && pref[1] == tsupp[1]) {
-                if (nmatch == k) {
-                    int id = (pref[0] << 8) | pref[1];
-                    return tls1_ec_curve_id2nid(id);
-                }
-                k++;
-            }
-        }
-    }
-    if (nmatch == -1)
-        return k;
-    /* Out of range (nmatch > k). */
-    return NID_undef;
-}
-
-int tls1_set_curves(unsigned char **pext, size_t *pextlen,
-                    int *curves, size_t ncurves)
-{
-    unsigned char *clist, *p;
-    size_t i;
-    /*
-     * Bitmap of curves included to detect duplicates: only works while curve
-     * ids < 32
-     */
-    unsigned long dup_list = 0;
-# ifdef OPENSSL_NO_EC2M
-    EC_GROUP *curve;
-# endif
-
-    clist = OPENSSL_malloc(ncurves * 2);
-    if (!clist)
-        return 0;
-    for (i = 0, p = clist; i < ncurves; i++) {
-        unsigned long idmask;
-        int id;
-        id = tls1_ec_nid2curve_id(curves[i]);
-# ifdef OPENSSL_FIPS
-        /* NB: 25 is last curve ID supported by FIPS module */
-        if (FIPS_mode() && id > 25) {
-            OPENSSL_free(clist);
-            return 0;
-        }
-# endif
-# ifdef OPENSSL_NO_EC2M
-        curve = EC_GROUP_new_by_curve_name(curves[i]);
-        if (!curve || EC_METHOD_get_field_type(EC_GROUP_method_of(curve))
-            == NID_X9_62_characteristic_two_field) {
-            if (curve)
-                EC_GROUP_free(curve);
-            OPENSSL_free(clist);
-            return 0;
-        } else
-            EC_GROUP_free(curve);
-# endif
-        idmask = 1L << id;
-        if (!id || (dup_list & idmask)) {
-            OPENSSL_free(clist);
-            return 0;
-        }
-        dup_list |= idmask;
-        s2n(id, p);
-    }
-    if (*pext)
-        OPENSSL_free(*pext);
-    *pext = clist;
-    *pextlen = ncurves * 2;
-    return 1;
-}
-
-# define MAX_CURVELIST   28
-
-typedef struct {
-    size_t nidcnt;
-    int nid_arr[MAX_CURVELIST];
-} nid_cb_st;
-
-static int nid_cb(const char *elem, int len, void *arg)
-{
-    nid_cb_st *narg = arg;
-    size_t i;
-    int nid;
-    char etmp[20];
-    if (elem == NULL)
-        return 0;
-    if (narg->nidcnt == MAX_CURVELIST)
-        return 0;
-    if (len > (int)(sizeof(etmp) - 1))
-        return 0;
-    memcpy(etmp, elem, len);
-    etmp[len] = 0;
-    nid = EC_curve_nist2nid(etmp);
-    if (nid == NID_undef)
-        nid = OBJ_sn2nid(etmp);
-    if (nid == NID_undef)
-        nid = OBJ_ln2nid(etmp);
-    if (nid == NID_undef)
-        return 0;
-    for (i = 0; i < narg->nidcnt; i++)
-        if (narg->nid_arr[i] == nid)
-            return 0;
-    narg->nid_arr[narg->nidcnt++] = nid;
-    return 1;
-}
-
-/* Set curves based on a colon separate list */
-int tls1_set_curves_list(unsigned char **pext, size_t *pextlen,
-                         const char *str)
-{
-    nid_cb_st ncb;
-    ncb.nidcnt = 0;
-    if (!CONF_parse_list(str, ':', 1, nid_cb, &ncb))
-        return 0;
-    if (pext == NULL)
-        return 1;
-    return tls1_set_curves(pext, pextlen, ncb.nid_arr, ncb.nidcnt);
-}
-
-/* For an EC key set TLS id and required compression based on parameters */
-static int tls1_set_ec_id(unsigned char *curve_id, unsigned char *comp_id,
-                          EC_KEY *ec)
-{
-    int is_prime, id;
-    const EC_GROUP *grp;
-    const EC_METHOD *meth;
-    if (!ec)
-        return 0;
-    /* Determine if it is a prime field */
-    grp = EC_KEY_get0_group(ec);
-    if (!grp)
-        return 0;
-    meth = EC_GROUP_method_of(grp);
-    if (!meth)
-        return 0;
-    if (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field)
-        is_prime = 1;
-    else
-        is_prime = 0;
-    /* Determine curve ID */
-    id = EC_GROUP_get_curve_name(grp);
-    id = tls1_ec_nid2curve_id(id);
-    /* If we have an ID set it, otherwise set arbitrary explicit curve */
-    if (id) {
-        curve_id[0] = 0;
-        curve_id[1] = (unsigned char)id;
-    } else {
-        curve_id[0] = 0xff;
-        if (is_prime)
-            curve_id[1] = 0x01;
-        else
-            curve_id[1] = 0x02;
-    }
-    if (comp_id) {
-        if (EC_KEY_get0_public_key(ec) == NULL)
-            return 0;
-        if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_COMPRESSED) {
-            if (is_prime)
-                *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
-            else
-                *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
-        } else
-            *comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
-    }
-    return 1;
-}
-
-/* Check an EC key is compatible with extensions */
-static int tls1_check_ec_key(SSL *s,
-                             unsigned char *curve_id, unsigned char *comp_id)
-{
-    const unsigned char *pformats, *pcurves;
-    size_t num_formats, num_curves, i;
-    int j;
-    /*
-     * If point formats extension present check it, otherwise everything is
-     * supported (see RFC4492).
-     */
-    if (comp_id && s->session->tlsext_ecpointformatlist) {
-        pformats = s->session->tlsext_ecpointformatlist;
-        num_formats = s->session->tlsext_ecpointformatlist_length;
-        for (i = 0; i < num_formats; i++, pformats++) {
-            if (*comp_id == *pformats)
-                break;
-        }
-        if (i == num_formats)
-            return 0;
-    }
-    if (!curve_id)
-        return 1;
-    /* Check curve is consistent with client and server preferences */
-    for (j = 0; j <= 1; j++) {
-        if (!tls1_get_curvelist(s, j, &pcurves, &num_curves))
-            return 0;
-        if (j == 1 && num_curves == 0) {
-            /*
-             * If we've not received any curves then skip this check.
-             * RFC 4492 does not require the supported elliptic curves extension
-             * so if it is not sent we can just choose any curve.
-             * It is invalid to send an empty list in the elliptic curves
-             * extension, so num_curves == 0 always means no extension.
-             */
-            break;
-        }
-        for (i = 0; i < num_curves; i++, pcurves += 2) {
-            if (pcurves[0] == curve_id[0] && pcurves[1] == curve_id[1])
-                break;
-        }
-        if (i == num_curves)
-            return 0;
-        /* For clients can only check sent curve list */
-        if (!s->server)
-            return 1;
-    }
-    return 1;
-}
-
-static void tls1_get_formatlist(SSL *s, const unsigned char **pformats,
-                                size_t *num_formats)
-{
-    /*
-     * If we have a custom point format list use it otherwise use default
-     */
-    if (s->tlsext_ecpointformatlist) {
-        *pformats = s->tlsext_ecpointformatlist;
-        *num_formats = s->tlsext_ecpointformatlist_length;
-    } else {
-        *pformats = ecformats_default;
-        /* For Suite B we don't support char2 fields */
-        if (tls1_suiteb(s))
-            *num_formats = sizeof(ecformats_default) - 1;
-        else
-            *num_formats = sizeof(ecformats_default);
-    }
-}
-
-/*
- * Check cert parameters compatible with extensions: currently just checks EC
- * certificates have compatible curves and compression.
- */
-static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md)
-{
-    unsigned char comp_id, curve_id[2];
-    EVP_PKEY *pkey;
-    int rv;
-    pkey = X509_get_pubkey(x);
-    if (!pkey)
-        return 0;
-    /* If not EC nothing to do */
-    if (pkey->type != EVP_PKEY_EC) {
-        EVP_PKEY_free(pkey);
-        return 1;
-    }
-    rv = tls1_set_ec_id(curve_id, &comp_id, pkey->pkey.ec);
-    EVP_PKEY_free(pkey);
-    if (!rv)
-        return 0;
-    /*
-     * Can't check curve_id for client certs as we don't have a supported
-     * curves extension.
-     */
-    rv = tls1_check_ec_key(s, s->server ? curve_id : NULL, &comp_id);
-    if (!rv)
-        return 0;
-    /*
-     * Special case for suite B. We *MUST* sign using SHA256+P-256 or
-     * SHA384+P-384, adjust digest if necessary.
-     */
-    if (set_ee_md && tls1_suiteb(s)) {
-        int check_md;
-        size_t i;
-        CERT *c = s->cert;
-        if (curve_id[0])
-            return 0;
-        /* Check to see we have necessary signing algorithm */
-        if (curve_id[1] == TLSEXT_curve_P_256)
-            check_md = NID_ecdsa_with_SHA256;
-        else if (curve_id[1] == TLSEXT_curve_P_384)
-            check_md = NID_ecdsa_with_SHA384;
-        else
-            return 0;           /* Should never happen */
-        for (i = 0; i < c->shared_sigalgslen; i++)
-            if (check_md == c->shared_sigalgs[i].signandhash_nid)
-                break;
-        if (i == c->shared_sigalgslen)
-            return 0;
-        if (set_ee_md == 2) {
-            if (check_md == NID_ecdsa_with_SHA256)
-                c->pkeys[SSL_PKEY_ECC].digest = EVP_sha256();
-            else
-                c->pkeys[SSL_PKEY_ECC].digest = EVP_sha384();
-        }
-    }
-    return rv;
-}
-
-# ifndef OPENSSL_NO_ECDH
-/* Check EC temporary key is compatible with client extensions */
-int tls1_check_ec_tmp_key(SSL *s, unsigned long cid)
-{
-    unsigned char curve_id[2];
-    EC_KEY *ec = s->cert->ecdh_tmp;
-#  ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
-    /* Allow any curve: not just those peer supports */
-    if (s->cert->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
-        return 1;
-#  endif
-    /*
-     * If Suite B, AES128 MUST use P-256 and AES256 MUST use P-384, no other
-     * curves permitted.
-     */
-    if (tls1_suiteb(s)) {
-        /* Curve to check determined by ciphersuite */
-        if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)
-            curve_id[1] = TLSEXT_curve_P_256;
-        else if (cid == TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384)
-            curve_id[1] = TLSEXT_curve_P_384;
-        else
-            return 0;
-        curve_id[0] = 0;
-        /* Check this curve is acceptable */
-        if (!tls1_check_ec_key(s, curve_id, NULL))
-            return 0;
-        /* If auto or setting curve from callback assume OK */
-        if (s->cert->ecdh_tmp_auto || s->cert->ecdh_tmp_cb)
-            return 1;
-        /* Otherwise check curve is acceptable */
-        else {
-            unsigned char curve_tmp[2];
-            if (!ec)
-                return 0;
-            if (!tls1_set_ec_id(curve_tmp, NULL, ec))
-                return 0;
-            if (!curve_tmp[0] || curve_tmp[1] == curve_id[1])
-                return 1;
-            return 0;
-        }
-
-    }
-    if (s->cert->ecdh_tmp_auto) {
-        /* Need a shared curve */
-        if (tls1_shared_curve(s, 0))
-            return 1;
-        else
-            return 0;
-    }
-    if (!ec) {
-        if (s->cert->ecdh_tmp_cb)
-            return 1;
-        else
-            return 0;
-    }
-    if (!tls1_set_ec_id(curve_id, NULL, ec))
-        return 0;
-/* Set this to allow use of invalid curves for testing */
-#  if 0
-    return 1;
-#  else
-    return tls1_check_ec_key(s, curve_id, NULL);
-#  endif
-}
-# endif                         /* OPENSSL_NO_ECDH */
-
-#else
-
-static int tls1_check_cert_param(SSL *s, X509 *x, int set_ee_md)
-{
-    return 1;
-}
-
-#endif                          /* OPENSSL_NO_EC */
-
-#ifndef OPENSSL_NO_TLSEXT
-
-/*
- * List of supported signature algorithms and hashes. Should make this
- * customisable at some point, for now include everything we support.
- */
-
-# ifdef OPENSSL_NO_RSA
-#  define tlsext_sigalg_rsa(md) /* */
-# else
-#  define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa,
-# endif
-
-# ifdef OPENSSL_NO_DSA
-#  define tlsext_sigalg_dsa(md) /* */
-# else
-#  define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa,
-# endif
-
-# ifdef OPENSSL_NO_ECDSA
-#  define tlsext_sigalg_ecdsa(md)
-                                /* */
-# else
-#  define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_ecdsa,
-# endif
-
-# define tlsext_sigalg(md) \
-                tlsext_sigalg_rsa(md) \
-                tlsext_sigalg_dsa(md) \
-                tlsext_sigalg_ecdsa(md)
-
-static unsigned char tls12_sigalgs[] = {
-# ifndef OPENSSL_NO_SHA512
-    tlsext_sigalg(TLSEXT_hash_sha512)
-        tlsext_sigalg(TLSEXT_hash_sha384)
-# endif
-# ifndef OPENSSL_NO_SHA256
-        tlsext_sigalg(TLSEXT_hash_sha256)
-        tlsext_sigalg(TLSEXT_hash_sha224)
-# endif
-# ifndef OPENSSL_NO_SHA
-        tlsext_sigalg(TLSEXT_hash_sha1)
-# endif
-};
-
-# ifndef OPENSSL_NO_ECDSA
-static unsigned char suiteb_sigalgs[] = {
-    tlsext_sigalg_ecdsa(TLSEXT_hash_sha256)
-        tlsext_sigalg_ecdsa(TLSEXT_hash_sha384)
-};
-# endif
-size_t tls12_get_psigalgs(SSL *s, const unsigned char **psigs)
-{
-    /*
-     * If Suite B mode use Suite B sigalgs only, ignore any other
-     * preferences.
-     */
-# ifndef OPENSSL_NO_EC
-    switch (tls1_suiteb(s)) {
-    case SSL_CERT_FLAG_SUITEB_128_LOS:
-        *psigs = suiteb_sigalgs;
-        return sizeof(suiteb_sigalgs);
-
-    case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
-        *psigs = suiteb_sigalgs;
-        return 2;
-
-    case SSL_CERT_FLAG_SUITEB_192_LOS:
-        *psigs = suiteb_sigalgs + 2;
-        return 2;
-    }
-# endif
-    /* If server use client authentication sigalgs if not NULL */
-    if (s->server && s->cert->client_sigalgs) {
-        *psigs = s->cert->client_sigalgs;
-        return s->cert->client_sigalgslen;
-    } else if (s->cert->conf_sigalgs) {
-        *psigs = s->cert->conf_sigalgs;
-        return s->cert->conf_sigalgslen;
-    } else {
-        *psigs = tls12_sigalgs;
-        return sizeof(tls12_sigalgs);
-    }
-}
-
-/*
- * Check signature algorithm is consistent with sent supported signature
- * algorithms and if so return relevant digest.
- */
-int tls12_check_peer_sigalg(const EVP_MD **pmd, SSL *s,
-                            const unsigned char *sig, EVP_PKEY *pkey)
-{
-    const unsigned char *sent_sigs;
-    size_t sent_sigslen, i;
-    int sigalg = tls12_get_sigid(pkey);
-    /* Should never happen */
-    if (sigalg == -1)
-        return -1;
-    /* Check key type is consistent with signature */
-    if (sigalg != (int)sig[1]) {
-        SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
-        return 0;
-    }
-# ifndef OPENSSL_NO_EC
-    if (pkey->type == EVP_PKEY_EC) {
-        unsigned char curve_id[2], comp_id;
-        /* Check compression and curve matches extensions */
-        if (!tls1_set_ec_id(curve_id, &comp_id, pkey->pkey.ec))
-            return 0;
-        if (!s->server && !tls1_check_ec_key(s, curve_id, &comp_id)) {
-            SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_CURVE);
-            return 0;
-        }
-        /* If Suite B only P-384+SHA384 or P-256+SHA-256 allowed */
-        if (tls1_suiteb(s)) {
-            if (curve_id[0])
-                return 0;
-            if (curve_id[1] == TLSEXT_curve_P_256) {
-                if (sig[0] != TLSEXT_hash_sha256) {
-                    SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG,
-                           SSL_R_ILLEGAL_SUITEB_DIGEST);
-                    return 0;
-                }
-            } else if (curve_id[1] == TLSEXT_curve_P_384) {
-                if (sig[0] != TLSEXT_hash_sha384) {
-                    SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG,
-                           SSL_R_ILLEGAL_SUITEB_DIGEST);
-                    return 0;
-                }
-            } else
-                return 0;
-        }
-    } else if (tls1_suiteb(s))
-        return 0;
-# endif
-
-    /* Check signature matches a type we sent */
-    sent_sigslen = tls12_get_psigalgs(s, &sent_sigs);
-    for (i = 0; i < sent_sigslen; i += 2, sent_sigs += 2) {
-        if (sig[0] == sent_sigs[0] && sig[1] == sent_sigs[1])
-            break;
-    }
-    /* Allow fallback to SHA1 if not strict mode */
-    if (i == sent_sigslen
-        && (sig[0] != TLSEXT_hash_sha1
-            || s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
-        SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_WRONG_SIGNATURE_TYPE);
-        return 0;
-    }
-    *pmd = tls12_get_hash(sig[0]);
-    if (*pmd == NULL) {
-        SSLerr(SSL_F_TLS12_CHECK_PEER_SIGALG, SSL_R_UNKNOWN_DIGEST);
-        return 0;
-    }
-    /*
-     * Store the digest used so applications can retrieve it if they wish.
-     */
-    if (s->session && s->session->sess_cert)
-        s->session->sess_cert->peer_key->digest = *pmd;
-    return 1;
-}
-
-/*
- * Get a mask of disabled algorithms: an algorithm is disabled if it isn't
- * supported or doesn't appear in supported signature algorithms. Unlike
- * ssl_cipher_get_disabled this applies to a specific session and not global
- * settings.
- */
-void ssl_set_client_disabled(SSL *s)
-{
-    CERT *c = s->cert;
-    const unsigned char *sigalgs;
-    size_t i, sigalgslen;
-    int have_rsa = 0, have_dsa = 0, have_ecdsa = 0;
-    c->mask_a = 0;
-    c->mask_k = 0;
-    /* Don't allow TLS 1.2 only ciphers if we don't suppport them */
-    if (!SSL_CLIENT_USE_TLS1_2_CIPHERS(s))
-        c->mask_ssl = SSL_TLSV1_2;
-    else
-        c->mask_ssl = 0;
-    /*
-     * Now go through all signature algorithms seeing if we support any for
-     * RSA, DSA, ECDSA. Do this for all versions not just TLS 1.2.
-     */
-    sigalgslen = tls12_get_psigalgs(s, &sigalgs);
-    for (i = 0; i < sigalgslen; i += 2, sigalgs += 2) {
-        switch (sigalgs[1]) {
-# ifndef OPENSSL_NO_RSA
-        case TLSEXT_signature_rsa:
-            have_rsa = 1;
-            break;
-# endif
-# ifndef OPENSSL_NO_DSA
-        case TLSEXT_signature_dsa:
-            have_dsa = 1;
-            break;
-# endif
-# ifndef OPENSSL_NO_ECDSA
-        case TLSEXT_signature_ecdsa:
-            have_ecdsa = 1;
-            break;
-# endif
-        }
-    }
-    /*
-     * Disable auth and static DH if we don't include any appropriate
-     * signature algorithms.
-     */
-    if (!have_rsa) {
-        c->mask_a |= SSL_aRSA;
-        c->mask_k |= SSL_kDHr | SSL_kECDHr;
-    }
-    if (!have_dsa) {
-        c->mask_a |= SSL_aDSS;
-        c->mask_k |= SSL_kDHd;
-    }
-    if (!have_ecdsa) {
-        c->mask_a |= SSL_aECDSA;
-        c->mask_k |= SSL_kECDHe;
-    }
-# ifndef OPENSSL_NO_KRB5
-    if (!kssl_tgt_is_available(s->kssl_ctx)) {
-        c->mask_a |= SSL_aKRB5;
-        c->mask_k |= SSL_kKRB5;
-    }
-# endif
-# ifndef OPENSSL_NO_PSK
-    /* with PSK there must be client callback set */
-    if (!s->psk_client_callback) {
-        c->mask_a |= SSL_aPSK;
-        c->mask_k |= SSL_kPSK;
-    }
-# endif                         /* OPENSSL_NO_PSK */
-# ifndef OPENSSL_NO_SRP
-    if (!(s->srp_ctx.srp_Mask & SSL_kSRP)) {
-        c->mask_a |= SSL_aSRP;
-        c->mask_k |= SSL_kSRP;
-    }
-# endif
-    c->valid = 1;
-}
-
-unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *buf,
-                                          unsigned char *limit, int *al)
-{
-    int extdatalen = 0;
-    unsigned char *orig = buf;
-    unsigned char *ret = buf;
-# ifndef OPENSSL_NO_EC
-    /* See if we support any ECC ciphersuites */
-    int using_ecc = 0;
-    if (s->version >= TLS1_VERSION || SSL_IS_DTLS(s)) {
-        int i;
-        unsigned long alg_k, alg_a;
-        STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
-
-        for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++) {
-            SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
-
-            alg_k = c->algorithm_mkey;
-            alg_a = c->algorithm_auth;
-            if ((alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe)
-                 || (alg_a & SSL_aECDSA))) {
-                using_ecc = 1;
-                break;
-            }
-        }
-    }
-# endif
-
-    /* don't add extensions for SSLv3 unless doing secure renegotiation */
-    if (s->client_version == SSL3_VERSION && !s->s3->send_connection_binding)
-        return orig;
-
-    ret += 2;
-
-    if (ret >= limit)
-        return NULL;            /* this really never occurs, but ... */
-
-    if (s->tlsext_hostname != NULL) {
-        /* Add TLS extension servername to the Client Hello message */
-        size_t size_str;
-
-        /*-
-         * check for enough space.
-         * 4 for the servername type and entension length
-         * 2 for servernamelist length
-         * 1 for the hostname type
-         * 2 for hostname length
-         * + hostname length
-         */
-        size_str = strlen(s->tlsext_hostname);
-        if (CHECKLEN(ret, 9 + size_str, limit))
-            return NULL;
-
-        /* extension type and length */
-        s2n(TLSEXT_TYPE_server_name, ret);
-        s2n(size_str + 5, ret);
-
-        /* length of servername list */
-        s2n(size_str + 3, ret);
-
-        /* hostname type, length and hostname */
-        *(ret++) = (unsigned char)TLSEXT_NAMETYPE_host_name;
-        s2n(size_str, ret);
-        memcpy(ret, s->tlsext_hostname, size_str);
-        ret += size_str;
-    }
-
-    /* Add RI if renegotiating */
-    if (s->renegotiate) {
-        int el;
-
-        if (!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0)) {
-            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-
-        if ((limit - ret - 4 - el) < 0)
-            return NULL;
-
-        s2n(TLSEXT_TYPE_renegotiate, ret);
-        s2n(el, ret);
-
-        if (!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el)) {
-            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-
-        ret += el;
-    }
-# ifndef OPENSSL_NO_SRP
-    /* Add SRP username if there is one */
-    if (s->srp_ctx.login != NULL) { /* Add TLS extension SRP username to the
-                                     * Client Hello message */
-
-        size_t login_len = strlen(s->srp_ctx.login);
-        if (login_len > 255 || login_len == 0) {
-            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-
-        /*-
-         * check for enough space.
-         * 4 for the srp type type and entension length
-         * 1 for the srp user identity
-         * + srp user identity length
-         */
-        if (CHECKLEN(ret, 5 + login_len, limit))
-            return NULL;
-
-        /* fill in the extension */
-        s2n(TLSEXT_TYPE_srp, ret);
-        s2n(login_len + 1, ret);
-        (*ret++) = (unsigned char)login_len;
-        memcpy(ret, s->srp_ctx.login, login_len);
-        ret += login_len;
-    }
-# endif
-
-# ifndef OPENSSL_NO_EC
-    if (using_ecc) {
-        /*
-         * Add TLS extension ECPointFormats to the ClientHello message
-         */
-        const unsigned char *pcurves, *pformats;
-        size_t num_curves, num_formats, curves_list_len;
-
-        tls1_get_formatlist(s, &pformats, &num_formats);
-
-        if (num_formats > 255) {
-            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-        /*-
-         * check for enough space.
-         * 4 bytes for the ec point formats type and extension length
-         * 1 byte for the length of the formats
-         * + formats length
-         */
-        if (CHECKLEN(ret, 5 + num_formats, limit))
-            return NULL;
-
-        s2n(TLSEXT_TYPE_ec_point_formats, ret);
-        /* The point format list has 1-byte length. */
-        s2n(num_formats + 1, ret);
-        *(ret++) = (unsigned char)num_formats;
-        memcpy(ret, pformats, num_formats);
-        ret += num_formats;
-
-        /*
-         * Add TLS extension EllipticCurves to the ClientHello message
-         */
-        pcurves = s->tlsext_ellipticcurvelist;
-        if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves))
-            return NULL;
-
-        if (num_curves > 65532 / 2) {
-            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-        curves_list_len = 2 * num_curves;
-        /*-
-         * check for enough space.
-         * 4 bytes for the ec curves type and extension length
-         * 2 bytes for the curve list length
-         * + curve list length
-         */
-        if (CHECKLEN(ret, 6 + curves_list_len, limit))
-            return NULL;
-
-        s2n(TLSEXT_TYPE_elliptic_curves, ret);
-        s2n(curves_list_len + 2, ret);
-        s2n(curves_list_len, ret);
-        memcpy(ret, pcurves, curves_list_len);
-        ret += curves_list_len;
-    }
-# endif                         /* OPENSSL_NO_EC */
-
-    if (!(SSL_get_options(s) & SSL_OP_NO_TICKET)) {
-        size_t ticklen;
-        if (!s->new_session && s->session && s->session->tlsext_tick)
-            ticklen = s->session->tlsext_ticklen;
-        else if (s->session && s->tlsext_session_ticket &&
-                 s->tlsext_session_ticket->data) {
-            ticklen = s->tlsext_session_ticket->length;
-            s->session->tlsext_tick = OPENSSL_malloc(ticklen);
-            if (!s->session->tlsext_tick)
-                return NULL;
-            memcpy(s->session->tlsext_tick,
-                   s->tlsext_session_ticket->data, ticklen);
-            s->session->tlsext_ticklen = ticklen;
-        } else
-            ticklen = 0;
-        if (ticklen == 0 && s->tlsext_session_ticket &&
-            s->tlsext_session_ticket->data == NULL)
-            goto skip_ext;
-        /*
-         * Check for enough room 2 for extension type, 2 for len rest for
-         * ticket
-         */
-        if (CHECKLEN(ret, 4 + ticklen, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_session_ticket, ret);
-        s2n(ticklen, ret);
-        if (ticklen > 0) {
-            memcpy(ret, s->session->tlsext_tick, ticklen);
-            ret += ticklen;
-        }
-    }
- skip_ext:
-
-    if (SSL_CLIENT_USE_SIGALGS(s)) {
-        size_t salglen;
-        const unsigned char *salg;
-        salglen = tls12_get_psigalgs(s, &salg);
-
-        /*-
-         * check for enough space.
-         * 4 bytes for the sigalgs type and extension length
-         * 2 bytes for the sigalg list length
-         * + sigalg list length
-         */
-        if (CHECKLEN(ret, salglen + 6, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_signature_algorithms, ret);
-        s2n(salglen + 2, ret);
-        s2n(salglen, ret);
-        memcpy(ret, salg, salglen);
-        ret += salglen;
-    }
-# ifdef TLSEXT_TYPE_opaque_prf_input
-    if (s->s3->client_opaque_prf_input != NULL) {
-        size_t col = s->s3->client_opaque_prf_input_len;
-
-        if ((long)(limit - ret - 6 - col < 0))
-            return NULL;
-        if (col > 0xFFFD)       /* can't happen */
-            return NULL;
-
-        s2n(TLSEXT_TYPE_opaque_prf_input, ret);
-        s2n(col + 2, ret);
-        s2n(col, ret);
-        memcpy(ret, s->s3->client_opaque_prf_input, col);
-        ret += col;
-    }
-# endif
-
-    if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp) {
-        int i;
-        size_t extlen, idlen;
-        int lentmp;
-        OCSP_RESPID *id;
-
-        idlen = 0;
-        for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) {
-            id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
-            lentmp = i2d_OCSP_RESPID(id, NULL);
-            if (lentmp <= 0)
-                return NULL;
-            idlen += (size_t)lentmp + 2;
-        }
-
-        if (s->tlsext_ocsp_exts) {
-            lentmp = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
-            if (lentmp < 0)
-                return NULL;
-            extlen = (size_t)lentmp;
-        } else
-            extlen = 0;
-
-        if (extlen + idlen > 0xFFF0)
-            return NULL;
-        /*
-         * 2 bytes for status request type
-         * 2 bytes for status request len
-         * 1 byte for OCSP request type
-         * 2 bytes for length of ids
-         * 2 bytes for length of extensions
-         * + length of ids
-         * + length of extensions
-         */
-        if (CHECKLEN(ret, 9 + idlen + extlen, limit))
-            return NULL;
-
-        s2n(TLSEXT_TYPE_status_request, ret);
-        s2n(extlen + idlen + 5, ret);
-        *(ret++) = TLSEXT_STATUSTYPE_ocsp;
-        s2n(idlen, ret);
-        for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) {
-            /* save position of id len */
-            unsigned char *q = ret;
-            id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
-            /* skip over id len */
-            ret += 2;
-            lentmp = i2d_OCSP_RESPID(id, &ret);
-            /* write id len */
-            s2n(lentmp, q);
-        }
-        s2n(extlen, ret);
-        if (extlen > 0)
-            i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
-    }
-# ifndef OPENSSL_NO_HEARTBEATS
-    /* Add Heartbeat extension */
-
-    /*-
-     * check for enough space.
-     * 4 bytes for the heartbeat ext type and extension length
-     * 1 byte for the mode
-     */
-    if (CHECKLEN(ret, 5, limit))
-        return NULL;
-
-    s2n(TLSEXT_TYPE_heartbeat, ret);
-    s2n(1, ret);
-    /*-
-     * Set mode:
-     * 1: peer may send requests
-     * 2: peer not allowed to send requests
-     */
-    if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
-        *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
-    else
-        *(ret++) = SSL_TLSEXT_HB_ENABLED;
-# endif
-
-# ifndef OPENSSL_NO_NEXTPROTONEG
-    if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len) {
-        /*
-         * The client advertises an emtpy extension to indicate its support
-         * for Next Protocol Negotiation
-         */
-
-        /*-
-         * check for enough space.
-         * 4 bytes for the NPN ext type and extension length
-         */
-        if (CHECKLEN(ret, 4, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_next_proto_neg, ret);
-        s2n(0, ret);
-    }
-# endif
-
-    if (s->alpn_client_proto_list && !s->s3->tmp.finish_md_len) {
-        /*-
-         * check for enough space.
-         * 4 bytes for the ALPN type and extension length
-         * 2 bytes for the ALPN protocol list length
-         * + ALPN protocol list length
-         */
-        if (CHECKLEN(ret, 6 + s->alpn_client_proto_list_len, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_application_layer_protocol_negotiation, ret);
-        s2n(2 + s->alpn_client_proto_list_len, ret);
-        s2n(s->alpn_client_proto_list_len, ret);
-        memcpy(ret, s->alpn_client_proto_list, s->alpn_client_proto_list_len);
-        ret += s->alpn_client_proto_list_len;
-        s->cert->alpn_sent = 1;
-    }
-# ifndef OPENSSL_NO_SRTP
-    if (SSL_IS_DTLS(s) && SSL_get_srtp_profiles(s)) {
-        int el;
-
-        ssl_add_clienthello_use_srtp_ext(s, 0, &el, 0);
-
-        /*-
-         * check for enough space.
-         * 4 bytes for the SRTP type and extension length
-         * + SRTP profiles length
-         */
-        if (CHECKLEN(ret, 4 + el, limit))
-            return NULL;
-
-        s2n(TLSEXT_TYPE_use_srtp, ret);
-        s2n(el, ret);
-
-        if (ssl_add_clienthello_use_srtp_ext(s, ret, &el, el)) {
-            SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-        ret += el;
-    }
-# endif
-    custom_ext_init(&s->cert->cli_ext);
-    /* Add custom TLS Extensions to ClientHello */
-    if (!custom_ext_add(s, 0, &ret, limit, al))
-        return NULL;
-
-    /*
-     * Add padding to workaround bugs in F5 terminators. See
-     * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this
-     * code works out the length of all existing extensions it MUST always
-     * appear last.
-     */
-    if (s->options & SSL_OP_TLSEXT_PADDING) {
-        int hlen = ret - (unsigned char *)s->init_buf->data;
-        /*
-         * The code in s23_clnt.c to build ClientHello messages includes the
-         * 5-byte record header in the buffer, while the code in s3_clnt.c
-         * does not.
-         */
-        if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
-            hlen -= 5;
-        if (hlen > 0xff && hlen < 0x200) {
-            hlen = 0x200 - hlen;
-            if (hlen >= 4)
-                hlen -= 4;
-            else
-                hlen = 0;
-
-            /*-
-             * check for enough space. Strictly speaking we know we've already
-             * got enough space because to get here the message size is < 0x200,
-             * but we know that we've allocated far more than that in the buffer
-             * - but for consistency and robustness we're going to check anyway.
-             *
-             * 4 bytes for the padding type and extension length
-             * + padding length
-             */
-            if (CHECKLEN(ret, 4 + hlen, limit))
-                return NULL;
-            s2n(TLSEXT_TYPE_padding, ret);
-            s2n(hlen, ret);
-            memset(ret, 0, hlen);
-            ret += hlen;
-        }
-    }
-
-    if ((extdatalen = ret - orig - 2) == 0)
-        return orig;
-
-    s2n(extdatalen, orig);
-    return ret;
-}
-
-unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *buf,
-                                          unsigned char *limit, int *al)
-{
-    int extdatalen = 0;
-    unsigned char *orig = buf;
-    unsigned char *ret = buf;
-# ifndef OPENSSL_NO_NEXTPROTONEG
-    int next_proto_neg_seen;
-# endif
-# ifndef OPENSSL_NO_EC
-    unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-    unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
-    int using_ecc = (alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe))
-        || (alg_a & SSL_aECDSA);
-    using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
-# endif
-    /*
-     * don't add extensions for SSLv3, unless doing secure renegotiation
-     */
-    if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
-        return orig;
-
-    ret += 2;
-    if (ret >= limit)
-        return NULL;            /* this really never occurs, but ... */
-
-    if (!s->hit && s->servername_done == 1
-        && s->session->tlsext_hostname != NULL) {
-        if ((long)(limit - ret - 4) < 0)
-            return NULL;
-
-        s2n(TLSEXT_TYPE_server_name, ret);
-        s2n(0, ret);
-    }
-
-    if (s->s3->send_connection_binding) {
-        int el;
-
-        if (!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0)) {
-            SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-
-        /*-
-         * check for enough space.
-         * 4 bytes for the reneg type and extension length
-         * + reneg data length
-         */
-        if (CHECKLEN(ret, 4 + el, limit))
-            return NULL;
-
-        s2n(TLSEXT_TYPE_renegotiate, ret);
-        s2n(el, ret);
-
-        if (!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el)) {
-            SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-
-        ret += el;
-    }
-# ifndef OPENSSL_NO_EC
-    if (using_ecc) {
-        const unsigned char *plist;
-        size_t plistlen;
-        /*
-         * Add TLS extension ECPointFormats to the ServerHello message
-         */
-
-        tls1_get_formatlist(s, &plist, &plistlen);
-
-        if (plistlen > 255) {
-            SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-
-        /*-
-         * check for enough space.
-         * 4 bytes for the ec points format type and extension length
-         * 1 byte for the points format list length
-         * + length of points format list
-         */
-        if (CHECKLEN(ret, 5 + plistlen, limit))
-            return NULL;
-
-        s2n(TLSEXT_TYPE_ec_point_formats, ret);
-        s2n(plistlen + 1, ret);
-        *(ret++) = (unsigned char)plistlen;
-        memcpy(ret, plist, plistlen);
-        ret += plistlen;
-
-    }
-    /*
-     * Currently the server should not respond with a SupportedCurves
-     * extension
-     */
-# endif                         /* OPENSSL_NO_EC */
-
-    if (s->tlsext_ticket_expected && !(SSL_get_options(s) & SSL_OP_NO_TICKET)) {
-        /*-
-         * check for enough space.
-         * 4 bytes for the Ticket type and extension length
-         */
-        if (CHECKLEN(ret, 4, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_session_ticket, ret);
-        s2n(0, ret);
-    }
-
-    if (s->tlsext_status_expected) {
-        /*-
-         * check for enough space.
-         * 4 bytes for the Status request type and extension length
-         */
-        if (CHECKLEN(ret, 4, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_status_request, ret);
-        s2n(0, ret);
-    }
-# ifdef TLSEXT_TYPE_opaque_prf_input
-    if (s->s3->server_opaque_prf_input != NULL) {
-        size_t sol = s->s3->server_opaque_prf_input_len;
-
-        if ((long)(limit - ret - 6 - sol) < 0)
-            return NULL;
-        if (sol > 0xFFFD)       /* can't happen */
-            return NULL;
-
-        s2n(TLSEXT_TYPE_opaque_prf_input, ret);
-        s2n(sol + 2, ret);
-        s2n(sol, ret);
-        memcpy(ret, s->s3->server_opaque_prf_input, sol);
-        ret += sol;
-    }
-# endif
-
-# ifndef OPENSSL_NO_SRTP
-    if (SSL_IS_DTLS(s) && s->srtp_profile) {
-        int el;
-
-        ssl_add_serverhello_use_srtp_ext(s, 0, &el, 0);
-
-        /*-
-         * check for enough space.
-         * 4 bytes for the SRTP profiles type and extension length
-         * + length of the SRTP profiles list
-         */
-        if (CHECKLEN(ret, 4 + el, limit))
-            return NULL;
-
-        s2n(TLSEXT_TYPE_use_srtp, ret);
-        s2n(el, ret);
-
-        if (ssl_add_serverhello_use_srtp_ext(s, ret, &el, el)) {
-            SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
-            return NULL;
-        }
-        ret += el;
-    }
-# endif
-
-    if (((s->s3->tmp.new_cipher->id & 0xFFFF) == 0x80
-         || (s->s3->tmp.new_cipher->id & 0xFFFF) == 0x81)
-        && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG)) {
-        const unsigned char cryptopro_ext[36] = {
-            0xfd, 0xe8,         /* 65000 */
-            0x00, 0x20,         /* 32 bytes length */
-            0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
-            0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
-            0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
-            0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17
-        };
-
-        /* check for enough space. */
-        if (CHECKLEN(ret, sizeof(cryptopro_ext), limit))
-            return NULL;
-        memcpy(ret, cryptopro_ext, sizeof(cryptopro_ext));
-        ret += sizeof(cryptopro_ext);
-
-    }
-# ifndef OPENSSL_NO_HEARTBEATS
-    /* Add Heartbeat extension if we've received one */
-    if (s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) {
-        /*-
-         * check for enough space.
-         * 4 bytes for the Heartbeat type and extension length
-         * 1 byte for the mode
-         */
-        if (CHECKLEN(ret, 5, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_heartbeat, ret);
-        s2n(1, ret);
-        /*-
-         * Set mode:
-         * 1: peer may send requests
-         * 2: peer not allowed to send requests
-         */
-        if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
-            *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
-        else
-            *(ret++) = SSL_TLSEXT_HB_ENABLED;
-
-    }
-# endif
-
-# ifndef OPENSSL_NO_NEXTPROTONEG
-    next_proto_neg_seen = s->s3->next_proto_neg_seen;
-    s->s3->next_proto_neg_seen = 0;
-    if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb) {
-        const unsigned char *npa;
-        unsigned int npalen;
-        int r;
-
-        r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen,
-                                              s->
-                                              ctx->next_protos_advertised_cb_arg);
-        if (r == SSL_TLSEXT_ERR_OK) {
-            /*-
-             * check for enough space.
-             * 4 bytes for the NPN type and extension length
-             * + length of protocols list
-             */
-            if (CHECKLEN(ret, 4 + npalen, limit))
-                return NULL;
-            s2n(TLSEXT_TYPE_next_proto_neg, ret);
-            s2n(npalen, ret);
-            memcpy(ret, npa, npalen);
-            ret += npalen;
-            s->s3->next_proto_neg_seen = 1;
-        }
-    }
-# endif
-    if (!custom_ext_add(s, 1, &ret, limit, al))
-        return NULL;
-
-    if (s->s3->alpn_selected) {
-        const unsigned char *selected = s->s3->alpn_selected;
-        size_t len = s->s3->alpn_selected_len;
-
-        /*-
-         * check for enough space.
-         * 4 bytes for the ALPN type and extension length
-         * 2 bytes for ALPN data length
-         * 1 byte for selected protocol length
-         * + length of the selected protocol
-         */
-        if (CHECKLEN(ret, 7 + len, limit))
-            return NULL;
-        s2n(TLSEXT_TYPE_application_layer_protocol_negotiation, ret);
-        s2n(3 + len, ret);
-        s2n(1 + len, ret);
-        *ret++ = len;
-        memcpy(ret, selected, len);
-        ret += len;
-    }
-
-    if ((extdatalen = ret - orig - 2) == 0)
-        return orig;
-
-    s2n(extdatalen, orig);
-    return ret;
-}
-
-# ifndef OPENSSL_NO_EC
-/*-
- * ssl_check_for_safari attempts to fingerprint Safari using OS X
- * SecureTransport using the TLS extension block in |d|, of length |n|.
- * Safari, since 10.6, sends exactly these extensions, in this order:
- *   SNI,
- *   elliptic_curves
- *   ec_point_formats
- *
- * We wish to fingerprint Safari because they broke ECDHE-ECDSA support in 10.8,
- * but they advertise support. So enabling ECDHE-ECDSA ciphers breaks them.
- * Sadly we cannot differentiate 10.6, 10.7 and 10.8.4 (which work), from
- * 10.8..10.8.3 (which don't work).
- */
-static void ssl_check_for_safari(SSL *s, const unsigned char *data,
-                                 const unsigned char *limit)
-{
-    unsigned short type, size;
-    static const unsigned char kSafariExtensionsBlock[] = {
-        0x00, 0x0a,             /* elliptic_curves extension */
-        0x00, 0x08,             /* 8 bytes */
-        0x00, 0x06,             /* 6 bytes of curve ids */
-        0x00, 0x17,             /* P-256 */
-        0x00, 0x18,             /* P-384 */
-        0x00, 0x19,             /* P-521 */
-
-        0x00, 0x0b,             /* ec_point_formats */
-        0x00, 0x02,             /* 2 bytes */
-        0x01,                   /* 1 point format */
-        0x00,                   /* uncompressed */
-    };
-
-    /* The following is only present in TLS 1.2 */
-    static const unsigned char kSafariTLS12ExtensionsBlock[] = {
-        0x00, 0x0d,             /* signature_algorithms */
-        0x00, 0x0c,             /* 12 bytes */
-        0x00, 0x0a,             /* 10 bytes */
-        0x05, 0x01,             /* SHA-384/RSA */
-        0x04, 0x01,             /* SHA-256/RSA */
-        0x02, 0x01,             /* SHA-1/RSA */
-        0x04, 0x03,             /* SHA-256/ECDSA */
-        0x02, 0x03,             /* SHA-1/ECDSA */
-    };
-
-    if (limit - data <= 2)
-        return;
-    data += 2;
-
-    if (limit - data < 4)
-        return;
-    n2s(data, type);
-    n2s(data, size);
-
-    if (type != TLSEXT_TYPE_server_name)
-        return;
-
-    if (limit - data < size)
-        return;
-    data += size;
-
-    if (TLS1_get_client_version(s) >= TLS1_2_VERSION) {
-        const size_t len1 = sizeof(kSafariExtensionsBlock);
-        const size_t len2 = sizeof(kSafariTLS12ExtensionsBlock);
-
-        if (limit - data != (int)(len1 + len2))
-            return;
-        if (memcmp(data, kSafariExtensionsBlock, len1) != 0)
-            return;
-        if (memcmp(data + len1, kSafariTLS12ExtensionsBlock, len2) != 0)
-            return;
-    } else {
-        const size_t len = sizeof(kSafariExtensionsBlock);
-
-        if (limit - data != (int)(len))
-            return;
-        if (memcmp(data, kSafariExtensionsBlock, len) != 0)
-            return;
-    }
-
-    s->s3->is_probably_safari = 1;
-}
-# endif                         /* !OPENSSL_NO_EC */
-
-/*
- * tls1_alpn_handle_client_hello is called to save the ALPN extension in a
- * ClientHello.  data: the contents of the extension, not including the type
- * and length.  data_len: the number of bytes in |data| al: a pointer to the
- * alert value to send in the event of a non-zero return.  returns: 0 on
- * success.
- */
-static int tls1_alpn_handle_client_hello(SSL *s, const unsigned char *data,
-                                         unsigned data_len, int *al)
-{
-    unsigned i;
-    unsigned proto_len;
-
-    if (data_len < 2)
-        goto parse_error;
-
-    /*
-     * data should contain a uint16 length followed by a series of 8-bit,
-     * length-prefixed strings.
-     */
-    i = ((unsigned)data[0]) << 8 | ((unsigned)data[1]);
-    data_len -= 2;
-    data += 2;
-    if (data_len != i)
-        goto parse_error;
-
-    if (data_len < 2)
-        goto parse_error;
-
-    for (i = 0; i < data_len;) {
-        proto_len = data[i];
-        i++;
-
-        if (proto_len == 0)
-            goto parse_error;
-
-        if (i + proto_len < i || i + proto_len > data_len)
-            goto parse_error;
-
-        i += proto_len;
-    }
-
-    if (s->cert->alpn_proposed != NULL)
-        OPENSSL_free(s->cert->alpn_proposed);
-    s->cert->alpn_proposed = OPENSSL_malloc(data_len);
-    if (s->cert->alpn_proposed == NULL) {
-        *al = SSL_AD_INTERNAL_ERROR;
-        return -1;
-    }
-    memcpy(s->cert->alpn_proposed, data, data_len);
-    s->cert->alpn_proposed_len = data_len;
-    return 0;
-
- parse_error:
-    *al = SSL_AD_DECODE_ERROR;
-    return -1;
-}
-
-/*
- * Process the ALPN extension in a ClientHello.
- * al: a pointer to the alert value to send in the event of a failure.
- * returns 1 on success, 0 on failure: al set only on failure
- */
-static int tls1_alpn_handle_client_hello_late(SSL *s, int *al)
-{
-    const unsigned char *selected = NULL;
-    unsigned char selected_len = 0;
-
-    if (s->ctx->alpn_select_cb != NULL && s->cert->alpn_proposed != NULL) {
-        int r = s->ctx->alpn_select_cb(s, &selected, &selected_len,
-                                       s->cert->alpn_proposed,
-                                       s->cert->alpn_proposed_len,
-                                       s->ctx->alpn_select_cb_arg);
-
-        if (r == SSL_TLSEXT_ERR_OK) {
-            OPENSSL_free(s->s3->alpn_selected);
-            s->s3->alpn_selected = OPENSSL_malloc(selected_len);
-            if (s->s3->alpn_selected == NULL) {
-                *al = SSL_AD_INTERNAL_ERROR;
-                return 0;
-            }
-            memcpy(s->s3->alpn_selected, selected, selected_len);
-            s->s3->alpn_selected_len = selected_len;
-# ifndef OPENSSL_NO_NEXTPROTONEG
-            /* ALPN takes precedence over NPN. */
-            s->s3->next_proto_neg_seen = 0;
-# endif
-        }
-    }
-
-    return 1;
-}
-
-static int ssl_scan_clienthello_tlsext(SSL *s, unsigned char **p,
-                                       unsigned char *limit, int *al)
-{
-    unsigned short type;
-    unsigned short size;
-    unsigned short len;
-    unsigned char *data = *p;
-    int renegotiate_seen = 0;
-
-    s->servername_done = 0;
-    s->tlsext_status_type = -1;
-# ifndef OPENSSL_NO_NEXTPROTONEG
-    s->s3->next_proto_neg_seen = 0;
-# endif
-
-    if (s->s3->alpn_selected) {
-        OPENSSL_free(s->s3->alpn_selected);
-        s->s3->alpn_selected = NULL;
-    }
-    s->s3->alpn_selected_len = 0;
-    if (s->cert->alpn_proposed) {
-        OPENSSL_free(s->cert->alpn_proposed);
-        s->cert->alpn_proposed = NULL;
-    }
-    s->cert->alpn_proposed_len = 0;
-# ifndef OPENSSL_NO_HEARTBEATS
-    s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
-                             SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
-# endif
-
-# ifndef OPENSSL_NO_EC
-    if (s->options & SSL_OP_SAFARI_ECDHE_ECDSA_BUG)
-        ssl_check_for_safari(s, data, limit);
-# endif                         /* !OPENSSL_NO_EC */
-
-    /* Clear any signature algorithms extension received */
-    if (s->cert->peer_sigalgs) {
-        OPENSSL_free(s->cert->peer_sigalgs);
-        s->cert->peer_sigalgs = NULL;
-    }
-# ifndef OPENSSL_NO_SRP
-    if (s->srp_ctx.login != NULL) {
-        OPENSSL_free(s->srp_ctx.login);
-        s->srp_ctx.login = NULL;
-    }
-# endif
-
-    s->srtp_profile = NULL;
-
-    if (data == limit)
-        goto ri_check;
-
-    if (limit - data < 2)
-        goto err;
-
-    n2s(data, len);
-
-    if (limit - data != len)
-        goto err;
-
-    while (limit - data >= 4) {
-        n2s(data, type);
-        n2s(data, size);
-
-        if (limit - data < size)
-            goto err;
-# if 0
-        fprintf(stderr, "Received extension type %d size %d\n", type, size);
-# endif
-        if (s->tlsext_debug_cb)
-            s->tlsext_debug_cb(s, 0, type, data, size, s->tlsext_debug_arg);
-/*-
- * The servername extension is treated as follows:
- *
- * - Only the hostname type is supported with a maximum length of 255.
- * - The servername is rejected if too long or if it contains zeros,
- *   in which case an fatal alert is generated.
- * - The servername field is maintained together with the session cache.
- * - When a session is resumed, the servername call back invoked in order
- *   to allow the application to position itself to the right context.
- * - The servername is acknowledged if it is new for a session or when
- *   it is identical to a previously used for the same session.
- *   Applications can control the behaviour.  They can at any time
- *   set a 'desirable' servername for a new SSL object. This can be the
- *   case for example with HTTPS when a Host: header field is received and
- *   a renegotiation is requested. In this case, a possible servername
- *   presented in the new client hello is only acknowledged if it matches
- *   the value of the Host: field.
- * - Applications must  use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
- *   if they provide for changing an explicit servername context for the
- *   session, i.e. when the session has been established with a servername
- *   extension.
- * - On session reconnect, the servername extension may be absent.
- *
- */
-
-        if (type == TLSEXT_TYPE_server_name) {
-            unsigned char *sdata;
-            int servname_type;
-            int dsize;
-
-            if (size < 2)
-                goto err;
-            n2s(data, dsize);
-            size -= 2;
-            if (dsize > size)
-                goto err;
-
-            sdata = data;
-            while (dsize > 3) {
-                servname_type = *(sdata++);
-                n2s(sdata, len);
-                dsize -= 3;
-
-                if (len > dsize)
-                    goto err;
-
-                if (s->servername_done == 0)
-                    switch (servname_type) {
-                    case TLSEXT_NAMETYPE_host_name:
-                        if (!s->hit) {
-                            if (s->session->tlsext_hostname)
-                                goto err;
-
-                            if (len > TLSEXT_MAXLEN_host_name) {
-                                *al = TLS1_AD_UNRECOGNIZED_NAME;
-                                return 0;
-                            }
-                            if ((s->session->tlsext_hostname =
-                                 OPENSSL_malloc(len + 1)) == NULL) {
-                                *al = TLS1_AD_INTERNAL_ERROR;
-                                return 0;
-                            }
-                            memcpy(s->session->tlsext_hostname, sdata, len);
-                            s->session->tlsext_hostname[len] = '\0';
-                            if (strlen(s->session->tlsext_hostname) != len) {
-                                OPENSSL_free(s->session->tlsext_hostname);
-                                s->session->tlsext_hostname = NULL;
-                                *al = TLS1_AD_UNRECOGNIZED_NAME;
-                                return 0;
-                            }
-                            s->servername_done = 1;
-
-                        } else
-                            s->servername_done = s->session->tlsext_hostname
-                                && strlen(s->session->tlsext_hostname) == len
-                                && strncmp(s->session->tlsext_hostname,
-                                           (char *)sdata, len) == 0;
-
-                        break;
-
-                    default:
-                        break;
-                    }
-
-                dsize -= len;
-            }
-            if (dsize != 0)
-                goto err;
-
-        }
-# ifndef OPENSSL_NO_SRP
-        else if (type == TLSEXT_TYPE_srp) {
-            if (size == 0 || ((len = data[0])) != (size - 1))
-                goto err;
-            if (s->srp_ctx.login != NULL)
-                goto err;
-            if ((s->srp_ctx.login = OPENSSL_malloc(len + 1)) == NULL)
-                return -1;
-            memcpy(s->srp_ctx.login, &data[1], len);
-            s->srp_ctx.login[len] = '\0';
-
-            if (strlen(s->srp_ctx.login) != len)
-                goto err;
-        }
-# endif
-
-# ifndef OPENSSL_NO_EC
-        else if (type == TLSEXT_TYPE_ec_point_formats) {
-            unsigned char *sdata = data;
-            int ecpointformatlist_length = *(sdata++);
-
-            if (ecpointformatlist_length != size - 1 ||
-                ecpointformatlist_length < 1)
-                goto err;
-            if (!s->hit) {
-                if (s->session->tlsext_ecpointformatlist) {
-                    OPENSSL_free(s->session->tlsext_ecpointformatlist);
-                    s->session->tlsext_ecpointformatlist = NULL;
-                }
-                s->session->tlsext_ecpointformatlist_length = 0;
-                if ((s->session->tlsext_ecpointformatlist =
-                     OPENSSL_malloc(ecpointformatlist_length)) == NULL) {
-                    *al = TLS1_AD_INTERNAL_ERROR;
-                    return 0;
-                }
-                s->session->tlsext_ecpointformatlist_length =
-                    ecpointformatlist_length;
-                memcpy(s->session->tlsext_ecpointformatlist, sdata,
-                       ecpointformatlist_length);
-            }
-#  if 0
-            fprintf(stderr,
-                    "ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ",
-                    s->session->tlsext_ecpointformatlist_length);
-            sdata = s->session->tlsext_ecpointformatlist;
-            for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
-                fprintf(stderr, "%i ", *(sdata++));
-            fprintf(stderr, "\n");
-#  endif
-        } else if (type == TLSEXT_TYPE_elliptic_curves) {
-            unsigned char *sdata = data;
-            int ellipticcurvelist_length = (*(sdata++) << 8);
-            ellipticcurvelist_length += (*(sdata++));
-
-            if (ellipticcurvelist_length != size - 2 ||
-                ellipticcurvelist_length < 1 ||
-                /* Each NamedCurve is 2 bytes. */
-                ellipticcurvelist_length & 1)
-                    goto err;
-
-            if (!s->hit) {
-                if (s->session->tlsext_ellipticcurvelist)
-                    goto err;
-
-                s->session->tlsext_ellipticcurvelist_length = 0;
-                if ((s->session->tlsext_ellipticcurvelist =
-                     OPENSSL_malloc(ellipticcurvelist_length)) == NULL) {
-                    *al = TLS1_AD_INTERNAL_ERROR;
-                    return 0;
-                }
-                s->session->tlsext_ellipticcurvelist_length =
-                    ellipticcurvelist_length;
-                memcpy(s->session->tlsext_ellipticcurvelist, sdata,
-                       ellipticcurvelist_length);
-            }
-#  if 0
-            fprintf(stderr,
-                    "ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ",
-                    s->session->tlsext_ellipticcurvelist_length);
-            sdata = s->session->tlsext_ellipticcurvelist;
-            for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
-                fprintf(stderr, "%i ", *(sdata++));
-            fprintf(stderr, "\n");
-#  endif
-        }
-# endif                         /* OPENSSL_NO_EC */
-# ifdef TLSEXT_TYPE_opaque_prf_input
-        else if (type == TLSEXT_TYPE_opaque_prf_input) {
-            unsigned char *sdata = data;
-
-            if (size < 2) {
-                *al = SSL_AD_DECODE_ERROR;
-                return 0;
-            }
-            n2s(sdata, s->s3->client_opaque_prf_input_len);
-            if (s->s3->client_opaque_prf_input_len != size - 2) {
-                *al = SSL_AD_DECODE_ERROR;
-                return 0;
-            }
-
-            if (s->s3->client_opaque_prf_input != NULL) {
-                /* shouldn't really happen */
-                OPENSSL_free(s->s3->client_opaque_prf_input);
-            }
-
-            /* dummy byte just to get non-NULL */
-            if (s->s3->client_opaque_prf_input_len == 0)
-                s->s3->client_opaque_prf_input = OPENSSL_malloc(1);
-            else
-                s->s3->client_opaque_prf_input =
-                    BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
-            if (s->s3->client_opaque_prf_input == NULL) {
-                *al = TLS1_AD_INTERNAL_ERROR;
-                return 0;
-            }
-        }
-# endif
-        else if (type == TLSEXT_TYPE_session_ticket) {
-            if (s->tls_session_ticket_ext_cb &&
-                !s->tls_session_ticket_ext_cb(s, data, size,
-                                              s->tls_session_ticket_ext_cb_arg))
-            {
-                *al = TLS1_AD_INTERNAL_ERROR;
-                return 0;
-            }
-        } else if (type == TLSEXT_TYPE_renegotiate) {
-            if (!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
-                return 0;
-            renegotiate_seen = 1;
-        } else if (type == TLSEXT_TYPE_signature_algorithms) {
-            int dsize;
-            if (s->cert->peer_sigalgs || size < 2)
-                goto err;
-            n2s(data, dsize);
-            size -= 2;
-            if (dsize != size || dsize & 1 || !dsize)
-                goto err;
-            if (!tls1_save_sigalgs(s, data, dsize))
-                goto err;
-        } else if (type == TLSEXT_TYPE_status_request) {
-
-            if (size < 5)
-                goto err;
-
-            s->tlsext_status_type = *data++;
-            size--;
-            if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp) {
-                const unsigned char *sdata;
-                int dsize;
-                /* Read in responder_id_list */
-                n2s(data, dsize);
-                size -= 2;
-                if (dsize > size)
-                    goto err;
-
-                /*
-                 * We remove any OCSP_RESPIDs from a previous handshake
-                 * to prevent unbounded memory growth - CVE-2016-6304
-                 */
-                sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids,
-                                        OCSP_RESPID_free);
-                if (dsize > 0) {
-                    s->tlsext_ocsp_ids = sk_OCSP_RESPID_new_null();
-                    if (s->tlsext_ocsp_ids == NULL) {
-                        *al = SSL_AD_INTERNAL_ERROR;
-                        return 0;
-                    }
-                } else {
-                    s->tlsext_ocsp_ids = NULL;
-                }
-
-                while (dsize > 0) {
-                    OCSP_RESPID *id;
-                    int idsize;
-                    if (dsize < 4)
-                        goto err;
-                    n2s(data, idsize);
-                    dsize -= 2 + idsize;
-                    size -= 2 + idsize;
-                    if (dsize < 0)
-                        goto err;
-                    sdata = data;
-                    data += idsize;
-                    id = d2i_OCSP_RESPID(NULL, &sdata, idsize);
-                    if (!id)
-                        goto err;
-                    if (data != sdata) {
-                        OCSP_RESPID_free(id);
-                        goto err;
-                    }
-                    if (!sk_OCSP_RESPID_push(s->tlsext_ocsp_ids, id)) {
-                        OCSP_RESPID_free(id);
-                        *al = SSL_AD_INTERNAL_ERROR;
-                        return 0;
-                    }
-                }
-
-                /* Read in request_extensions */
-                if (size < 2)
-                    goto err;
-                n2s(data, dsize);
-                size -= 2;
-                if (dsize != size)
-                    goto err;
-                sdata = data;
-                if (dsize > 0) {
-                    if (s->tlsext_ocsp_exts) {
-                        sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
-                                                   X509_EXTENSION_free);
-                    }
-
-                    s->tlsext_ocsp_exts =
-                        d2i_X509_EXTENSIONS(NULL, &sdata, dsize);
-                    if (!s->tlsext_ocsp_exts || (data + dsize != sdata))
-                        goto err;
-                }
-            }
-            /*
-             * We don't know what to do with any other type * so ignore it.
-             */
-            else
-                s->tlsext_status_type = -1;
-        }
-# ifndef OPENSSL_NO_HEARTBEATS
-        else if (type == TLSEXT_TYPE_heartbeat) {
-            switch (data[0]) {
-            case 0x01:         /* Client allows us to send HB requests */
-                s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
-                break;
-            case 0x02:         /* Client doesn't accept HB requests */
-                s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
-                s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
-                break;
-            default:
-                *al = SSL_AD_ILLEGAL_PARAMETER;
-                return 0;
-            }
-        }
-# endif
-# ifndef OPENSSL_NO_NEXTPROTONEG
-        else if (type == TLSEXT_TYPE_next_proto_neg &&
-                 s->s3->tmp.finish_md_len == 0) {
-            /*-
-             * We shouldn't accept this extension on a
-             * renegotiation.
-             *
-             * s->new_session will be set on renegotiation, but we
-             * probably shouldn't rely that it couldn't be set on
-             * the initial renegotation too in certain cases (when
-             * there's some other reason to disallow resuming an
-             * earlier session -- the current code won't be doing
-             * anything like that, but this might change).
-             *
-             * A valid sign that there's been a previous handshake
-             * in this connection is if s->s3->tmp.finish_md_len >
-             * 0.  (We are talking about a check that will happen
-             * in the Hello protocol round, well before a new
-             * Finished message could have been computed.)
-             */
-            s->s3->next_proto_neg_seen = 1;
-        }
-# endif
-
-        else if (type == TLSEXT_TYPE_application_layer_protocol_negotiation &&
-                 s->s3->tmp.finish_md_len == 0) {
-            if (tls1_alpn_handle_client_hello(s, data, size, al) != 0)
-                return 0;
-        }
-
-        /* session ticket processed earlier */
-# ifndef OPENSSL_NO_SRTP
-        else if (SSL_IS_DTLS(s) && SSL_get_srtp_profiles(s)
-                 && type == TLSEXT_TYPE_use_srtp) {
-            if (ssl_parse_clienthello_use_srtp_ext(s, data, size, al))
-                return 0;
-        }
-# endif
-
-        data += size;
-    }
-
-    /* Spurious data on the end */
-    if (data != limit)
-        goto err;
-
-    *p = data;
-
- ri_check:
-
-    /* Need RI if renegotiating */
-
-    if (!renegotiate_seen && s->renegotiate &&
-        !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
-        *al = SSL_AD_HANDSHAKE_FAILURE;
-        SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
-               SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
-        return 0;
-    }
-
-    return 1;
-err:
-    *al = SSL_AD_DECODE_ERROR;
-    return 0;
-}
-
-/*
- * Parse any custom extensions found.  "data" is the start of the extension data
- * and "limit" is the end of the record. TODO: add strict syntax checking.
- */
-
-static int ssl_scan_clienthello_custom_tlsext(SSL *s,
-                                              const unsigned char *data,
-                                              const unsigned char *limit,
-                                              int *al)
-{
-    unsigned short type, size, len;
-    /* If resumed session or no custom extensions nothing to do */
-    if (s->hit || s->cert->srv_ext.meths_count == 0)
-        return 1;
-
-    if (limit - data <= 2)
-        return 1;
-    n2s(data, len);
-
-    if (limit - data < len)
-        return 1;
-
-    while (limit - data >= 4) {
-        n2s(data, type);
-        n2s(data, size);
-
-        if (limit - data < size)
-            return 1;
-        if (custom_ext_parse(s, 1 /* server */ , type, data, size, al) <= 0)
-            return 0;
-
-        data += size;
-    }
-
-    return 1;
-}
-
-int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p,
-                                 unsigned char *limit)
-{
-    int al = -1;
-    unsigned char *ptmp = *p;
-    /*
-     * Internally supported extensions are parsed first so SNI can be handled
-     * before custom extensions. An application processing SNI will typically
-     * switch the parent context using SSL_set_SSL_CTX and custom extensions
-     * need to be handled by the new SSL_CTX structure.
-     */
-    if (ssl_scan_clienthello_tlsext(s, p, limit, &al) <= 0) {
-        ssl3_send_alert(s, SSL3_AL_FATAL, al);
-        return 0;
-    }
-
-    if (ssl_check_clienthello_tlsext_early(s) <= 0) {
-        SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT, SSL_R_CLIENTHELLO_TLSEXT);
-        return 0;
-    }
-
-    custom_ext_init(&s->cert->srv_ext);
-    if (ssl_scan_clienthello_custom_tlsext(s, ptmp, limit, &al) <= 0) {
-        ssl3_send_alert(s, SSL3_AL_FATAL, al);
-        return 0;
-    }
-
-    return 1;
-}
-
-# ifndef OPENSSL_NO_NEXTPROTONEG
-/*
- * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
- * elements of zero length are allowed and the set of elements must exactly
- * fill the length of the block.
- */
-static char ssl_next_proto_validate(unsigned char *d, unsigned len)
-{
-    unsigned int off = 0;
-
-    while (off < len) {
-        if (d[off] == 0)
-            return 0;
-        off += d[off];
-        off++;
-    }
-
-    return off == len;
-}
-# endif
-
-static int ssl_scan_serverhello_tlsext(SSL *s, unsigned char **p,
-                                       unsigned char *d, int n, int *al)
-{
-    unsigned short length;
-    unsigned short type;
-    unsigned short size;
-    unsigned char *data = *p;
-    int tlsext_servername = 0;
-    int renegotiate_seen = 0;
-
-# ifndef OPENSSL_NO_NEXTPROTONEG
-    s->s3->next_proto_neg_seen = 0;
-# endif
-    s->tlsext_ticket_expected = 0;
-
-    if (s->s3->alpn_selected) {
-        OPENSSL_free(s->s3->alpn_selected);
-        s->s3->alpn_selected = NULL;
-    }
-# ifndef OPENSSL_NO_HEARTBEATS
-    s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
-                             SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
-# endif
-
-    if ((d + n) - data <= 2)
-        goto ri_check;
-
-    n2s(data, length);
-    if ((d + n) - data != length) {
-        *al = SSL_AD_DECODE_ERROR;
-        return 0;
-    }
-
-    while ((d + n) - data >= 4) {
-        n2s(data, type);
-        n2s(data, size);
-
-        if ((d + n) - data < size)
-            goto ri_check;
-
-        if (s->tlsext_debug_cb)
-            s->tlsext_debug_cb(s, 1, type, data, size, s->tlsext_debug_arg);
-
-        if (type == TLSEXT_TYPE_server_name) {
-            if (s->tlsext_hostname == NULL || size > 0) {
-                *al = TLS1_AD_UNRECOGNIZED_NAME;
-                return 0;
-            }
-            tlsext_servername = 1;
-        }
-# ifndef OPENSSL_NO_EC
-        else if (type == TLSEXT_TYPE_ec_point_formats) {
-            unsigned char *sdata = data;
-            int ecpointformatlist_length = *(sdata++);
-
-            if (ecpointformatlist_length != size - 1) {
-                *al = TLS1_AD_DECODE_ERROR;
-                return 0;
-            }
-            if (!s->hit) {
-                s->session->tlsext_ecpointformatlist_length = 0;
-                if (s->session->tlsext_ecpointformatlist != NULL)
-                    OPENSSL_free(s->session->tlsext_ecpointformatlist);
-                if ((s->session->tlsext_ecpointformatlist =
-                     OPENSSL_malloc(ecpointformatlist_length)) == NULL) {
-                    *al = TLS1_AD_INTERNAL_ERROR;
-                    return 0;
-                }
-                s->session->tlsext_ecpointformatlist_length =
-                    ecpointformatlist_length;
-                memcpy(s->session->tlsext_ecpointformatlist, sdata,
-                       ecpointformatlist_length);
-            }
-#  if 0
-            fprintf(stderr,
-                    "ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
-            sdata = s->session->tlsext_ecpointformatlist;
-            for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
-                fprintf(stderr, "%i ", *(sdata++));
-            fprintf(stderr, "\n");
-#  endif
-        }
-# endif                         /* OPENSSL_NO_EC */
-
-        else if (type == TLSEXT_TYPE_session_ticket) {
-            if (s->tls_session_ticket_ext_cb &&
-                !s->tls_session_ticket_ext_cb(s, data, size,
-                                              s->tls_session_ticket_ext_cb_arg))
-            {
-                *al = TLS1_AD_INTERNAL_ERROR;
-                return 0;
-            }
-            if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
-                || (size > 0)) {
-                *al = TLS1_AD_UNSUPPORTED_EXTENSION;
-                return 0;
-            }
-            s->tlsext_ticket_expected = 1;
-        }
-# ifdef TLSEXT_TYPE_opaque_prf_input
-        else if (type == TLSEXT_TYPE_opaque_prf_input) {
-            unsigned char *sdata = data;
-
-            if (size < 2) {
-                *al = SSL_AD_DECODE_ERROR;
-                return 0;
-            }
-            n2s(sdata, s->s3->server_opaque_prf_input_len);
-            if (s->s3->server_opaque_prf_input_len != size - 2) {
-                *al = SSL_AD_DECODE_ERROR;
-                return 0;
-            }
-
-            if (s->s3->server_opaque_prf_input != NULL) {
-                /* shouldn't really happen */
-                OPENSSL_free(s->s3->server_opaque_prf_input);
-            }
-            if (s->s3->server_opaque_prf_input_len == 0) {
-                /* dummy byte just to get non-NULL */
-                s->s3->server_opaque_prf_input = OPENSSL_malloc(1);
-            } else {
-                s->s3->server_opaque_prf_input =
-                    BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
-            }
-
-            if (s->s3->server_opaque_prf_input == NULL) {
-                *al = TLS1_AD_INTERNAL_ERROR;
-                return 0;
-            }
-        }
-# endif
-        else if (type == TLSEXT_TYPE_status_request) {
-            /*
-             * MUST be empty and only sent if we've requested a status
-             * request message.
-             */
-            if ((s->tlsext_status_type == -1) || (size > 0)) {
-                *al = TLS1_AD_UNSUPPORTED_EXTENSION;
-                return 0;
-            }
-            /* Set flag to expect CertificateStatus message */
-            s->tlsext_status_expected = 1;
-        }
-# ifndef OPENSSL_NO_NEXTPROTONEG
-        else if (type == TLSEXT_TYPE_next_proto_neg &&
-                 s->s3->tmp.finish_md_len == 0) {
-            unsigned char *selected;
-            unsigned char selected_len;
-
-            /* We must have requested it. */
-            if (s->ctx->next_proto_select_cb == NULL) {
-                *al = TLS1_AD_UNSUPPORTED_EXTENSION;
-                return 0;
-            }
-            /* The data must be valid */
-            if (!ssl_next_proto_validate(data, size)) {
-                *al = TLS1_AD_DECODE_ERROR;
-                return 0;
-            }
-            if (s->
-                ctx->next_proto_select_cb(s, &selected, &selected_len, data,
-                                          size,
-                                          s->ctx->next_proto_select_cb_arg) !=
-                SSL_TLSEXT_ERR_OK) {
-                *al = TLS1_AD_INTERNAL_ERROR;
-                return 0;
-            }
-            /*
-             * Could be non-NULL if server has sent multiple NPN extensions in
-             * a single Serverhello
-             */
-            OPENSSL_free(s->next_proto_negotiated);
-            s->next_proto_negotiated = OPENSSL_malloc(selected_len);
-            if (!s->next_proto_negotiated) {
-                *al = TLS1_AD_INTERNAL_ERROR;
-                return 0;
-            }
-            memcpy(s->next_proto_negotiated, selected, selected_len);
-            s->next_proto_negotiated_len = selected_len;
-            s->s3->next_proto_neg_seen = 1;
-        }
-# endif
-
-        else if (type == TLSEXT_TYPE_application_layer_protocol_negotiation) {
-            unsigned len;
-
-            /* We must have requested it. */
-            if (!s->cert->alpn_sent) {
-                *al = TLS1_AD_UNSUPPORTED_EXTENSION;
-                return 0;
-            }
-            if (size < 4) {
-                *al = TLS1_AD_DECODE_ERROR;
-                return 0;
-            }
-            /*-
-             * The extension data consists of:
-             *   uint16 list_length
-             *   uint8 proto_length;
-             *   uint8 proto[proto_length];
-             */
-            len = data[0];
-            len <<= 8;
-            len |= data[1];
-            if (len != (unsigned)size - 2) {
-                *al = TLS1_AD_DECODE_ERROR;
-                return 0;
-            }
-            len = data[2];
-            if (len != (unsigned)size - 3) {
-                *al = TLS1_AD_DECODE_ERROR;
-                return 0;
-            }
-            if (s->s3->alpn_selected)
-                OPENSSL_free(s->s3->alpn_selected);
-            s->s3->alpn_selected = OPENSSL_malloc(len);
-            if (!s->s3->alpn_selected) {
-                *al = TLS1_AD_INTERNAL_ERROR;
-                return 0;
-            }
-            memcpy(s->s3->alpn_selected, data + 3, len);
-            s->s3->alpn_selected_len = len;
-        }
-
-        else if (type == TLSEXT_TYPE_renegotiate) {
-            if (!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
-                return 0;
-            renegotiate_seen = 1;
-        }
-# ifndef OPENSSL_NO_HEARTBEATS
-        else if (type == TLSEXT_TYPE_heartbeat) {
-            switch (data[0]) {
-            case 0x01:         /* Server allows us to send HB requests */
-                s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
-                break;
-            case 0x02:         /* Server doesn't accept HB requests */
-                s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
-                s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
-                break;
-            default:
-                *al = SSL_AD_ILLEGAL_PARAMETER;
-                return 0;
-            }
-        }
-# endif
-# ifndef OPENSSL_NO_SRTP
-        else if (SSL_IS_DTLS(s) && type == TLSEXT_TYPE_use_srtp) {
-            if (ssl_parse_serverhello_use_srtp_ext(s, data, size, al))
-                return 0;
-        }
-# endif
-        /*
-         * If this extension type was not otherwise handled, but matches a
-         * custom_cli_ext_record, then send it to the c callback
-         */
-        else if (custom_ext_parse(s, 0, type, data, size, al) <= 0)
-            return 0;
-
-        data += size;
-    }
-
-    if (data != d + n) {
-        *al = SSL_AD_DECODE_ERROR;
-        return 0;
-    }
-
-    if (!s->hit && tlsext_servername == 1) {
-        if (s->tlsext_hostname) {
-            if (s->session->tlsext_hostname == NULL) {
-                s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
-                if (!s->session->tlsext_hostname) {
-                    *al = SSL_AD_UNRECOGNIZED_NAME;
-                    return 0;
-                }
-            } else {
-                *al = SSL_AD_DECODE_ERROR;
-                return 0;
-            }
-        }
-    }
-
-    *p = data;
-
- ri_check:
-
-    /*
-     * Determine if we need to see RI. Strictly speaking if we want to avoid
-     * an attack we should *always* see RI even on initial server hello
-     * because the client doesn't see any renegotiation during an attack.
-     * However this would mean we could not connect to any server which
-     * doesn't support RI so for the immediate future tolerate RI absence on
-     * initial connect only.
-     */
-    if (!renegotiate_seen && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
-        && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
-        *al = SSL_AD_HANDSHAKE_FAILURE;
-        SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
-               SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
-        return 0;
-    }
-
-    return 1;
-}
-
-int ssl_prepare_clienthello_tlsext(SSL *s)
-{
-
-# ifdef TLSEXT_TYPE_opaque_prf_input
-    {
-        int r = 1;
-
-        if (s->ctx->tlsext_opaque_prf_input_callback != 0) {
-            r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0,
-                                                         s->
-                                                         ctx->tlsext_opaque_prf_input_callback_arg);
-            if (!r)
-                return -1;
-        }
-
-        if (s->tlsext_opaque_prf_input != NULL) {
-            if (s->s3->client_opaque_prf_input != NULL) {
-                /* shouldn't really happen */
-                OPENSSL_free(s->s3->client_opaque_prf_input);
-            }
-
-            if (s->tlsext_opaque_prf_input_len == 0) {
-                /* dummy byte just to get non-NULL */
-                s->s3->client_opaque_prf_input = OPENSSL_malloc(1);
-            } else {
-                s->s3->client_opaque_prf_input =
-                    BUF_memdup(s->tlsext_opaque_prf_input,
-                               s->tlsext_opaque_prf_input_len);
-            }
-            if (s->s3->client_opaque_prf_input == NULL) {
-                SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,
-                       ERR_R_MALLOC_FAILURE);
-                return -1;
-            }
-            s->s3->client_opaque_prf_input_len =
-                s->tlsext_opaque_prf_input_len;
-        }
-
-        if (r == 2)
-            /*
-             * at callback's request, insist on receiving an appropriate
-             * server opaque PRF input
-             */
-            s->s3->server_opaque_prf_input_len =
-                s->tlsext_opaque_prf_input_len;
-    }
-# endif
-
-    s->cert->alpn_sent = 0;
-    return 1;
-}
-
-int ssl_prepare_serverhello_tlsext(SSL *s)
-{
-    return 1;
-}
-
-static int ssl_check_clienthello_tlsext_early(SSL *s)
-{
-    int ret = SSL_TLSEXT_ERR_NOACK;
-    int al = SSL_AD_UNRECOGNIZED_NAME;
-
-# ifndef OPENSSL_NO_EC
-    /*
-     * The handling of the ECPointFormats extension is done elsewhere, namely
-     * in ssl3_choose_cipher in s3_lib.c.
-     */
-    /*
-     * The handling of the EllipticCurves extension is done elsewhere, namely
-     * in ssl3_choose_cipher in s3_lib.c.
-     */
-# endif
-
-    if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
-        ret =
-            s->ctx->tlsext_servername_callback(s, &al,
-                                               s->ctx->tlsext_servername_arg);
-    else if (s->initial_ctx != NULL
-             && s->initial_ctx->tlsext_servername_callback != 0)
-        ret =
-            s->initial_ctx->tlsext_servername_callback(s, &al,
-                                                       s->
-                                                       initial_ctx->tlsext_servername_arg);
-
-# ifdef TLSEXT_TYPE_opaque_prf_input
-    {
-        /*
-         * This sort of belongs into ssl_prepare_serverhello_tlsext(), but we
-         * might be sending an alert in response to the client hello, so this
-         * has to happen here in ssl_check_clienthello_tlsext_early().
-         */
-
-        int r = 1;
-
-        if (s->ctx->tlsext_opaque_prf_input_callback != 0) {
-            r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0,
-                                                         s->
-                                                         ctx->tlsext_opaque_prf_input_callback_arg);
-            if (!r) {
-                ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-                al = SSL_AD_INTERNAL_ERROR;
-                goto err;
-            }
-        }
-
-        if (s->s3->server_opaque_prf_input != NULL) {
-            /* shouldn't really happen */
-            OPENSSL_free(s->s3->server_opaque_prf_input);
-        }
-        s->s3->server_opaque_prf_input = NULL;
-
-        if (s->tlsext_opaque_prf_input != NULL) {
-            if (s->s3->client_opaque_prf_input != NULL &&
-                s->s3->client_opaque_prf_input_len ==
-                s->tlsext_opaque_prf_input_len) {
-                /*
-                 * can only use this extension if we have a server opaque PRF
-                 * input of the same length as the client opaque PRF input!
-                 */
-
-                if (s->tlsext_opaque_prf_input_len == 0) {
-                    /* dummy byte just to get non-NULL */
-                    s->s3->server_opaque_prf_input = OPENSSL_malloc(1);
-                } else {
-                    s->s3->server_opaque_prf_input =
-                        BUF_memdup(s->tlsext_opaque_prf_input,
-                                   s->tlsext_opaque_prf_input_len);
-                }
-                if (s->s3->server_opaque_prf_input == NULL) {
-                    ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-                    al = SSL_AD_INTERNAL_ERROR;
-                    goto err;
-                }
-                s->s3->server_opaque_prf_input_len =
-                    s->tlsext_opaque_prf_input_len;
-            }
-        }
-
-        if (r == 2 && s->s3->server_opaque_prf_input == NULL) {
-            /*
-             * The callback wants to enforce use of the extension, but we
-             * can't do that with the client opaque PRF input; abort the
-             * handshake.
-             */
-            ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-            al = SSL_AD_HANDSHAKE_FAILURE;
-        }
-    }
-
- err:
-# endif
-    switch (ret) {
-    case SSL_TLSEXT_ERR_ALERT_FATAL:
-        ssl3_send_alert(s, SSL3_AL_FATAL, al);
-        return -1;
-
-    case SSL_TLSEXT_ERR_ALERT_WARNING:
-        ssl3_send_alert(s, SSL3_AL_WARNING, al);
-        return 1;
-
-    case SSL_TLSEXT_ERR_NOACK:
-        s->servername_done = 0;
-    default:
-        return 1;
-    }
-}
-
-int tls1_set_server_sigalgs(SSL *s)
-{
-    int al;
-    size_t i;
-    /* Clear any shared sigtnature algorithms */
-    if (s->cert->shared_sigalgs) {
-        OPENSSL_free(s->cert->shared_sigalgs);
-        s->cert->shared_sigalgs = NULL;
-        s->cert->shared_sigalgslen = 0;
-    }
-    /* Clear certificate digests and validity flags */
-    for (i = 0; i < SSL_PKEY_NUM; i++) {
-        s->cert->pkeys[i].digest = NULL;
-        s->cert->pkeys[i].valid_flags = 0;
-    }
-
-    /* If sigalgs received process it. */
-    if (s->cert->peer_sigalgs) {
-        if (!tls1_process_sigalgs(s)) {
-            SSLerr(SSL_F_TLS1_SET_SERVER_SIGALGS, ERR_R_MALLOC_FAILURE);
-            al = SSL_AD_INTERNAL_ERROR;
-            goto err;
-        }
-        /* Fatal error is no shared signature algorithms */
-        if (!s->cert->shared_sigalgs) {
-            SSLerr(SSL_F_TLS1_SET_SERVER_SIGALGS,
-                   SSL_R_NO_SHARED_SIGATURE_ALGORITHMS);
-            al = SSL_AD_ILLEGAL_PARAMETER;
-            goto err;
-        }
-    } else
-        ssl_cert_set_default_md(s->cert);
-    return 1;
- err:
-    ssl3_send_alert(s, SSL3_AL_FATAL, al);
-    return 0;
-}
-
-/*
- * Upon success, returns 1.
- * Upon failure, returns 0 and sets |al| to the appropriate fatal alert.
- */
-int ssl_check_clienthello_tlsext_late(SSL *s, int *al)
-{
-
-    /*
-     * If status request then ask callback what to do. Note: this must be
-     * called after servername callbacks in case the certificate has changed,
-     * and must be called after the cipher has been chosen because this may
-     * influence which certificate is sent
-     */
-    if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb) {
-        int ret;
-        CERT_PKEY *certpkey;
-        certpkey = ssl_get_server_send_pkey(s);
-        /* If no certificate can't return certificate status */
-        if (certpkey != NULL) {
-            /*
-             * Set current certificate to one we will use so SSL_get_certificate
-             * et al can pick it up.
-             */
-            s->cert->key = certpkey;
-            ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
-            switch (ret) {
-                /* We don't want to send a status request response */
-            case SSL_TLSEXT_ERR_NOACK:
-                s->tlsext_status_expected = 0;
-                break;
-                /* status request response should be sent */
-            case SSL_TLSEXT_ERR_OK:
-                if (s->tlsext_ocsp_resp)
-                    s->tlsext_status_expected = 1;
-                break;
-                /* something bad happened */
-            case SSL_TLSEXT_ERR_ALERT_FATAL:
-            default:
-                *al = SSL_AD_INTERNAL_ERROR;
-                return 0;
-            }
-        }
-    }
-
-    if (!tls1_alpn_handle_client_hello_late(s, al)) {
-        return 0;
-    }
-
-    return 1;
-}
-
-int ssl_check_serverhello_tlsext(SSL *s)
-{
-    int ret = SSL_TLSEXT_ERR_NOACK;
-    int al = SSL_AD_UNRECOGNIZED_NAME;
-
-# ifndef OPENSSL_NO_EC
-    /*
-     * If we are client and using an elliptic curve cryptography cipher
-     * suite, then if server returns an EC point formats lists extension it
-     * must contain uncompressed.
-     */
-    unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
-    unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
-    if ((s->tlsext_ecpointformatlist != NULL)
-        && (s->tlsext_ecpointformatlist_length > 0)
-        && (s->session->tlsext_ecpointformatlist != NULL)
-        && (s->session->tlsext_ecpointformatlist_length > 0)
-        && ((alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe))
-            || (alg_a & SSL_aECDSA))) {
-        /* we are using an ECC cipher */
-        size_t i;
-        unsigned char *list;
-        int found_uncompressed = 0;
-        list = s->session->tlsext_ecpointformatlist;
-        for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) {
-            if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed) {
-                found_uncompressed = 1;
-                break;
-            }
-        }
-        if (!found_uncompressed) {
-            SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,
-                   SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
-            return -1;
-        }
-    }
-    ret = SSL_TLSEXT_ERR_OK;
-# endif                         /* OPENSSL_NO_EC */
-
-    if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
-        ret =
-            s->ctx->tlsext_servername_callback(s, &al,
-                                               s->ctx->tlsext_servername_arg);
-    else if (s->initial_ctx != NULL
-             && s->initial_ctx->tlsext_servername_callback != 0)
-        ret =
-            s->initial_ctx->tlsext_servername_callback(s, &al,
-                                                       s->
-                                                       initial_ctx->tlsext_servername_arg);
-
-# ifdef TLSEXT_TYPE_opaque_prf_input
-    if (s->s3->server_opaque_prf_input_len > 0) {
-        /*
-         * This case may indicate that we, as a client, want to insist on
-         * using opaque PRF inputs. So first verify that we really have a
-         * value from the server too.
-         */
-
-        if (s->s3->server_opaque_prf_input == NULL) {
-            ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-            al = SSL_AD_HANDSHAKE_FAILURE;
-        }
-
-        /*
-         * Anytime the server *has* sent an opaque PRF input, we need to
-         * check that we have a client opaque PRF input of the same size.
-         */
-        if (s->s3->client_opaque_prf_input == NULL ||
-            s->s3->client_opaque_prf_input_len !=
-            s->s3->server_opaque_prf_input_len) {
-            ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-            al = SSL_AD_ILLEGAL_PARAMETER;
-        }
-    }
-# endif
-
-    OPENSSL_free(s->tlsext_ocsp_resp);
-    s->tlsext_ocsp_resp = NULL;
-    s->tlsext_ocsp_resplen = -1;
-    /*
-     * If we've requested certificate status and we wont get one tell the
-     * callback
-     */
-    if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
-        && !(s->hit) && s->ctx && s->ctx->tlsext_status_cb) {
-        int r;
-        /*
-         * Call callback with resp == NULL and resplen == -1 so callback
-         * knows there is no response
-         */
-        r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
-        if (r == 0) {
-            al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
-            ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-        }
-        if (r < 0) {
-            al = SSL_AD_INTERNAL_ERROR;
-            ret = SSL_TLSEXT_ERR_ALERT_FATAL;
-        }
-    }
-
-    switch (ret) {
-    case SSL_TLSEXT_ERR_ALERT_FATAL:
-        ssl3_send_alert(s, SSL3_AL_FATAL, al);
-        return -1;
-
-    case SSL_TLSEXT_ERR_ALERT_WARNING:
-        ssl3_send_alert(s, SSL3_AL_WARNING, al);
-        return 1;
-
-    case SSL_TLSEXT_ERR_NOACK:
-        s->servername_done = 0;
-    default:
-        return 1;
-    }
-}
-
-int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d,
-                                 int n)
-{
-    int al = -1;
-    if (s->version < SSL3_VERSION)
-        return 1;
-    if (ssl_scan_serverhello_tlsext(s, p, d, n, &al) <= 0) {
-        ssl3_send_alert(s, SSL3_AL_FATAL, al);
-        return 0;
-    }
-
-    if (ssl_check_serverhello_tlsext(s) <= 0) {
-        SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, SSL_R_SERVERHELLO_TLSEXT);
-        return 0;
-    }
-    return 1;
-}
-
-/*-
- * Since the server cache lookup is done early on in the processing of the
- * ClientHello, and other operations depend on the result, we need to handle
- * any TLS session ticket extension at the same time.
- *
- *   session_id: points at the session ID in the ClientHello. This code will
- *       read past the end of this in order to parse out the session ticket
- *       extension, if any.
- *   len: the length of the session ID.
- *   limit: a pointer to the first byte after the ClientHello.
- *   ret: (output) on return, if a ticket was decrypted, then this is set to
- *       point to the resulting session.
- *
- * If s->tls_session_secret_cb is set then we are expecting a pre-shared key
- * ciphersuite, in which case we have no use for session tickets and one will
- * never be decrypted, nor will s->tlsext_ticket_expected be set to 1.
- *
- * Returns:
- *   -1: fatal error, either from parsing or decrypting the ticket.
- *    0: no ticket was found (or was ignored, based on settings).
- *    1: a zero length extension was found, indicating that the client supports
- *       session tickets but doesn't currently have one to offer.
- *    2: either s->tls_session_secret_cb was set, or a ticket was offered but
- *       couldn't be decrypted because of a non-fatal error.
- *    3: a ticket was successfully decrypted and *ret was set.
- *
- * Side effects:
- *   Sets s->tlsext_ticket_expected to 1 if the server will have to issue
- *   a new session ticket to the client because the client indicated support
- *   (and s->tls_session_secret_cb is NULL) but the client either doesn't have
- *   a session ticket or we couldn't use the one it gave us, or if
- *   s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket.
- *   Otherwise, s->tlsext_ticket_expected is set to 0.
- */
-int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
-                        const unsigned char *limit, SSL_SESSION **ret)
-{
-    /* Point after session ID in client hello */
-    const unsigned char *p = session_id + len;
-    unsigned short i;
-
-    *ret = NULL;
-    s->tlsext_ticket_expected = 0;
-
-    /*
-     * If tickets disabled behave as if no ticket present to permit stateful
-     * resumption.
-     */
-    if (SSL_get_options(s) & SSL_OP_NO_TICKET)
-        return 0;
-    if ((s->version <= SSL3_VERSION) || !limit)
-        return 0;
-    if (p >= limit)
-        return -1;
-    /* Skip past DTLS cookie */
-    if (SSL_IS_DTLS(s)) {
-        i = *(p++);
-
-        if (limit - p <= i)
-            return -1;
-
-        p += i;
-    }
-    /* Skip past cipher list */
-    n2s(p, i);
-    if (limit - p <= i)
-        return -1;
-    p += i;
-
-    /* Skip past compression algorithm list */
-    i = *(p++);
-    if (limit - p < i)
-        return -1;
-    p += i;
-
-    /* Now at start of extensions */
-    if (limit - p <= 2)
-        return 0;
-    n2s(p, i);
-    while (limit - p >= 4) {
-        unsigned short type, size;
-        n2s(p, type);
-        n2s(p, size);
-        if (limit - p < size)
-            return 0;
-        if (type == TLSEXT_TYPE_session_ticket) {
-            int r;
-            if (size == 0) {
-                /*
-                 * The client will accept a ticket but doesn't currently have
-                 * one.
-                 */
-                s->tlsext_ticket_expected = 1;
-                return 1;
-            }
-            if (s->tls_session_secret_cb) {
-                /*
-                 * Indicate that the ticket couldn't be decrypted rather than
-                 * generating the session from ticket now, trigger
-                 * abbreviated handshake based on external mechanism to
-                 * calculate the master secret later.
-                 */
-                return 2;
-            }
-            r = tls_decrypt_ticket(s, p, size, session_id, len, ret);
-            switch (r) {
-            case 2:            /* ticket couldn't be decrypted */
-                s->tlsext_ticket_expected = 1;
-                return 2;
-            case 3:            /* ticket was decrypted */
-                return r;
-            case 4:            /* ticket decrypted but need to renew */
-                s->tlsext_ticket_expected = 1;
-                return 3;
-            default:           /* fatal error */
-                return -1;
-            }
-        }
-        p += size;
-    }
-    return 0;
-}
-
-/*-
- * tls_decrypt_ticket attempts to decrypt a session ticket.
- *
- *   etick: points to the body of the session ticket extension.
- *   eticklen: the length of the session tickets extenion.
- *   sess_id: points at the session ID.
- *   sesslen: the length of the session ID.
- *   psess: (output) on return, if a ticket was decrypted, then this is set to
- *       point to the resulting session.
- *
- * Returns:
- *   -1: fatal error, either from parsing or decrypting the ticket.
- *    2: the ticket couldn't be decrypted.
- *    3: a ticket was successfully decrypted and *psess was set.
- *    4: same as 3, but the ticket needs to be renewed.
- */
-static int tls_decrypt_ticket(SSL *s, const unsigned char *etick,
-                              int eticklen, const unsigned char *sess_id,
-                              int sesslen, SSL_SESSION **psess)
-{
-    SSL_SESSION *sess;
-    unsigned char *sdec;
-    const unsigned char *p;
-    int slen, mlen, renew_ticket = 0;
-    unsigned char tick_hmac[EVP_MAX_MD_SIZE];
-    HMAC_CTX hctx;
-    EVP_CIPHER_CTX ctx;
-    SSL_CTX *tctx = s->initial_ctx;
-
-    /* Initialize session ticket encryption and HMAC contexts */
-    HMAC_CTX_init(&hctx);
-    EVP_CIPHER_CTX_init(&ctx);
-    if (tctx->tlsext_ticket_key_cb) {
-        unsigned char *nctick = (unsigned char *)etick;
-        int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
-                                            &ctx, &hctx, 0);
-        if (rv < 0)
-            return -1;
-        if (rv == 0)
-            return 2;
-        if (rv == 2)
-            renew_ticket = 1;
-    } else {
-        /* Check key name matches */
-        if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
-            return 2;
-        if (HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
-                         tlsext_tick_md(), NULL) <= 0
-                || EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
-                                      tctx->tlsext_tick_aes_key,
-                                      etick + 16) <= 0) {
-            goto err;
-       }
-    }
-    /*
-     * Attempt to process session ticket, first conduct sanity and integrity
-     * checks on ticket.
-     */
-    mlen = HMAC_size(&hctx);
-    if (mlen < 0) {
-        goto err;
-    }
-    /* Sanity check ticket length: must exceed keyname + IV + HMAC */
-    if (eticklen <= 16 + EVP_CIPHER_CTX_iv_length(&ctx) + mlen) {
-        HMAC_CTX_cleanup(&hctx);
-        EVP_CIPHER_CTX_cleanup(&ctx);
-        return 2;
-    }
-
-    eticklen -= mlen;
-    /* Check HMAC of encrypted ticket */
-    if (HMAC_Update(&hctx, etick, eticklen) <= 0
-            || HMAC_Final(&hctx, tick_hmac, NULL) <= 0) {
-        goto err;
-    }
-    HMAC_CTX_cleanup(&hctx);
-    if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen)) {
-        EVP_CIPHER_CTX_cleanup(&ctx);
-        return 2;
-    }
-    /* Attempt to decrypt session data */
-    /* Move p after IV to start of encrypted ticket, update length */
-    p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
-    eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
-    sdec = OPENSSL_malloc(eticklen);
-    if (sdec == NULL
-            || EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen) <= 0) {
-        EVP_CIPHER_CTX_cleanup(&ctx);
-        OPENSSL_free(sdec);
-        return -1;
-    }
-    if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0) {
-        EVP_CIPHER_CTX_cleanup(&ctx);
-        OPENSSL_free(sdec);
-        return 2;
-    }
-    slen += mlen;
-    EVP_CIPHER_CTX_cleanup(&ctx);
-    p = sdec;
-
-    sess = d2i_SSL_SESSION(NULL, &p, slen);
-    OPENSSL_free(sdec);
-    if (sess) {
-        /*
-         * The session ID, if non-empty, is used by some clients to detect
-         * that the ticket has been accepted. So we copy it to the session
-         * structure. If it is empty set length to zero as required by
-         * standard.
-         */
-        if (sesslen)
-            memcpy(sess->session_id, sess_id, sesslen);
-        sess->session_id_length = sesslen;
-        *psess = sess;
-        if (renew_ticket)
-            return 4;
-        else
-            return 3;
-    }
-    ERR_clear_error();
-    /*
-     * For session parse failure, indicate that we need to send a new ticket.
-     */
-    return 2;
-err:
-    EVP_CIPHER_CTX_cleanup(&ctx);
-    HMAC_CTX_cleanup(&hctx);
-    return -1;
-}
-
-/* Tables to translate from NIDs to TLS v1.2 ids */
-
-typedef struct {
-    int nid;
-    int id;
-} tls12_lookup;
-
-static tls12_lookup tls12_md[] = {
-    {NID_md5, TLSEXT_hash_md5},
-    {NID_sha1, TLSEXT_hash_sha1},
-    {NID_sha224, TLSEXT_hash_sha224},
-    {NID_sha256, TLSEXT_hash_sha256},
-    {NID_sha384, TLSEXT_hash_sha384},
-    {NID_sha512, TLSEXT_hash_sha512}
-};
-
-static tls12_lookup tls12_sig[] = {
-    {EVP_PKEY_RSA, TLSEXT_signature_rsa},
-    {EVP_PKEY_DSA, TLSEXT_signature_dsa},
-    {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
-};
-
-static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
-{
-    size_t i;
-    for (i = 0; i < tlen; i++) {
-        if (table[i].nid == nid)
-            return table[i].id;
-    }
-    return -1;
-}
-
-static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
-{
-    size_t i;
-    for (i = 0; i < tlen; i++) {
-        if ((table[i].id) == id)
-            return table[i].nid;
-    }
-    return NID_undef;
-}
-
-int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk,
-                         const EVP_MD *md)
-{
-    int sig_id, md_id;
-    if (!md)
-        return 0;
-    md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
-                          sizeof(tls12_md) / sizeof(tls12_lookup));
-    if (md_id == -1)
-        return 0;
-    sig_id = tls12_get_sigid(pk);
-    if (sig_id == -1)
-        return 0;
-    p[0] = (unsigned char)md_id;
-    p[1] = (unsigned char)sig_id;
-    return 1;
-}
-
-int tls12_get_sigid(const EVP_PKEY *pk)
-{
-    return tls12_find_id(pk->type, tls12_sig,
-                         sizeof(tls12_sig) / sizeof(tls12_lookup));
-}
-
-const EVP_MD *tls12_get_hash(unsigned char hash_alg)
-{
-    switch (hash_alg) {
-# ifndef OPENSSL_NO_MD5
-    case TLSEXT_hash_md5:
-#  ifdef OPENSSL_FIPS
-        if (FIPS_mode())
-            return NULL;
-#  endif
-        return EVP_md5();
-# endif
-# ifndef OPENSSL_NO_SHA
-    case TLSEXT_hash_sha1:
-        return EVP_sha1();
-# endif
-# ifndef OPENSSL_NO_SHA256
-    case TLSEXT_hash_sha224:
-        return EVP_sha224();
-
-    case TLSEXT_hash_sha256:
-        return EVP_sha256();
-# endif
-# ifndef OPENSSL_NO_SHA512
-    case TLSEXT_hash_sha384:
-        return EVP_sha384();
-
-    case TLSEXT_hash_sha512:
-        return EVP_sha512();
-# endif
-    default:
-        return NULL;
-
-    }
-}
-
-static int tls12_get_pkey_idx(unsigned char sig_alg)
-{
-    switch (sig_alg) {
-# ifndef OPENSSL_NO_RSA
-    case TLSEXT_signature_rsa:
-        return SSL_PKEY_RSA_SIGN;
-# endif
-# ifndef OPENSSL_NO_DSA
-    case TLSEXT_signature_dsa:
-        return SSL_PKEY_DSA_SIGN;
-# endif
-# ifndef OPENSSL_NO_ECDSA
-    case TLSEXT_signature_ecdsa:
-        return SSL_PKEY_ECC;
-# endif
-    }
-    return -1;
-}
-
-/* Convert TLS 1.2 signature algorithm extension values into NIDs */
-static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid,
-                               int *psignhash_nid, const unsigned char *data)
-{
-    int sign_nid = NID_undef, hash_nid = NID_undef;
-    if (!phash_nid && !psign_nid && !psignhash_nid)
-        return;
-    if (phash_nid || psignhash_nid) {
-        hash_nid = tls12_find_nid(data[0], tls12_md,
-                                  sizeof(tls12_md) / sizeof(tls12_lookup));
-        if (phash_nid)
-            *phash_nid = hash_nid;
-    }
-    if (psign_nid || psignhash_nid) {
-        sign_nid = tls12_find_nid(data[1], tls12_sig,
-                                  sizeof(tls12_sig) / sizeof(tls12_lookup));
-        if (psign_nid)
-            *psign_nid = sign_nid;
-    }
-    if (psignhash_nid) {
-        if (sign_nid == NID_undef || hash_nid == NID_undef
-                || OBJ_find_sigid_by_algs(psignhash_nid, hash_nid,
-                                          sign_nid) <= 0)
-            *psignhash_nid = NID_undef;
-    }
-}
-
-/* Given preference and allowed sigalgs set shared sigalgs */
-static int tls12_do_shared_sigalgs(TLS_SIGALGS *shsig,
-                                   const unsigned char *pref, size_t preflen,
-                                   const unsigned char *allow,
-                                   size_t allowlen)
-{
-    const unsigned char *ptmp, *atmp;
-    size_t i, j, nmatch = 0;
-    for (i = 0, ptmp = pref; i < preflen; i += 2, ptmp += 2) {
-        /* Skip disabled hashes or signature algorithms */
-        if (tls12_get_hash(ptmp[0]) == NULL)
-            continue;
-        if (tls12_get_pkey_idx(ptmp[1]) == -1)
-            continue;
-        for (j = 0, atmp = allow; j < allowlen; j += 2, atmp += 2) {
-            if (ptmp[0] == atmp[0] && ptmp[1] == atmp[1]) {
-                nmatch++;
-                if (shsig) {
-                    shsig->rhash = ptmp[0];
-                    shsig->rsign = ptmp[1];
-                    tls1_lookup_sigalg(&shsig->hash_nid,
-                                       &shsig->sign_nid,
-                                       &shsig->signandhash_nid, ptmp);
-                    shsig++;
-                }
-                break;
-            }
-        }
-    }
-    return nmatch;
-}
-
-/* Set shared signature algorithms for SSL structures */
-static int tls1_set_shared_sigalgs(SSL *s)
-{
-    const unsigned char *pref, *allow, *conf;
-    size_t preflen, allowlen, conflen;
-    size_t nmatch;
-    TLS_SIGALGS *salgs = NULL;
-    CERT *c = s->cert;
-    unsigned int is_suiteb = tls1_suiteb(s);
-    if (c->shared_sigalgs) {
-        OPENSSL_free(c->shared_sigalgs);
-        c->shared_sigalgs = NULL;
-        c->shared_sigalgslen = 0;
-    }
-    /* If client use client signature algorithms if not NULL */
-    if (!s->server && c->client_sigalgs && !is_suiteb) {
-        conf = c->client_sigalgs;
-        conflen = c->client_sigalgslen;
-    } else if (c->conf_sigalgs && !is_suiteb) {
-        conf = c->conf_sigalgs;
-        conflen = c->conf_sigalgslen;
-    } else
-        conflen = tls12_get_psigalgs(s, &conf);
-    if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) {
-        pref = conf;
-        preflen = conflen;
-        allow = c->peer_sigalgs;
-        allowlen = c->peer_sigalgslen;
-    } else {
-        allow = conf;
-        allowlen = conflen;
-        pref = c->peer_sigalgs;
-        preflen = c->peer_sigalgslen;
-    }
-    nmatch = tls12_do_shared_sigalgs(NULL, pref, preflen, allow, allowlen);
-    if (nmatch) {
-        salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS));
-        if (!salgs)
-            return 0;
-        nmatch = tls12_do_shared_sigalgs(salgs, pref, preflen, allow, allowlen);
-    } else {
-        salgs = NULL;
-    }
-    c->shared_sigalgs = salgs;
-    c->shared_sigalgslen = nmatch;
-    return 1;
-}
-
-/* Set preferred digest for each key type */
-
-int tls1_save_sigalgs(SSL *s, const unsigned char *data, int dsize)
-{
-    CERT *c = s->cert;
-    /* Extension ignored for inappropriate versions */
-    if (!SSL_USE_SIGALGS(s))
-        return 1;
-    /* Should never happen */
-    if (!c)
-        return 0;
-
-    if (c->peer_sigalgs)
-        OPENSSL_free(c->peer_sigalgs);
-    c->peer_sigalgs = OPENSSL_malloc(dsize);
-    if (!c->peer_sigalgs)
-        return 0;
-    c->peer_sigalgslen = dsize;
-    memcpy(c->peer_sigalgs, data, dsize);
-    return 1;
-}
-
-int tls1_process_sigalgs(SSL *s)
-{
-    int idx;
-    size_t i;
-    const EVP_MD *md;
-    CERT *c = s->cert;
-    TLS_SIGALGS *sigptr;
-    if (!tls1_set_shared_sigalgs(s))
-        return 0;
-
-# ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
-    if (s->cert->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL) {
-        /*
-         * Use first set signature preference to force message digest,
-         * ignoring any peer preferences.
-         */
-        const unsigned char *sigs = NULL;
-        if (s->server)
-            sigs = c->conf_sigalgs;
-        else
-            sigs = c->client_sigalgs;
-        if (sigs) {
-            idx = tls12_get_pkey_idx(sigs[1]);
-            md = tls12_get_hash(sigs[0]);
-            c->pkeys[idx].digest = md;
-            c->pkeys[idx].valid_flags = CERT_PKEY_EXPLICIT_SIGN;
-            if (idx == SSL_PKEY_RSA_SIGN) {
-                c->pkeys[SSL_PKEY_RSA_ENC].valid_flags =
-                    CERT_PKEY_EXPLICIT_SIGN;
-                c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
-            }
-        }
-    }
-# endif
-
-    for (i = 0, sigptr = c->shared_sigalgs;
-         i < c->shared_sigalgslen; i++, sigptr++) {
-        idx = tls12_get_pkey_idx(sigptr->rsign);
-        if (idx > 0 && c->pkeys[idx].digest == NULL) {
-            md = tls12_get_hash(sigptr->rhash);
-            c->pkeys[idx].digest = md;
-            c->pkeys[idx].valid_flags = CERT_PKEY_EXPLICIT_SIGN;
-            if (idx == SSL_PKEY_RSA_SIGN) {
-                c->pkeys[SSL_PKEY_RSA_ENC].valid_flags =
-                    CERT_PKEY_EXPLICIT_SIGN;
-                c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
-            }
-        }
-
-    }
-    /*
-     * In strict mode leave unset digests as NULL to indicate we can't use
-     * the certificate for signing.
-     */
-    if (!(s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)) {
-        /*
-         * Set any remaining keys to default values. NOTE: if alg is not
-         * supported it stays as NULL.
-         */
-# ifndef OPENSSL_NO_DSA
-        if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
-            c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
-# endif
-# ifndef OPENSSL_NO_RSA
-        if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest) {
-            c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
-            c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
-        }
-# endif
-# ifndef OPENSSL_NO_ECDSA
-        if (!c->pkeys[SSL_PKEY_ECC].digest)
-            c->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
-# endif
-    }
-    return 1;
-}
-
-int SSL_get_sigalgs(SSL *s, int idx,
-                    int *psign, int *phash, int *psignhash,
-                    unsigned char *rsig, unsigned char *rhash)
-{
-    const unsigned char *psig = s->cert->peer_sigalgs;
-    if (psig == NULL)
-        return 0;
-    if (idx >= 0) {
-        idx <<= 1;
-        if (idx >= (int)s->cert->peer_sigalgslen)
-            return 0;
-        psig += idx;
-        if (rhash)
-            *rhash = psig[0];
-        if (rsig)
-            *rsig = psig[1];
-        tls1_lookup_sigalg(phash, psign, psignhash, psig);
-    }
-    return s->cert->peer_sigalgslen / 2;
-}
-
-int SSL_get_shared_sigalgs(SSL *s, int idx,
-                           int *psign, int *phash, int *psignhash,
-                           unsigned char *rsig, unsigned char *rhash)
-{
-    TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs;
-    if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen)
-        return 0;
-    shsigalgs += idx;
-    if (phash)
-        *phash = shsigalgs->hash_nid;
-    if (psign)
-        *psign = shsigalgs->sign_nid;
-    if (psignhash)
-        *psignhash = shsigalgs->signandhash_nid;
-    if (rsig)
-        *rsig = shsigalgs->rsign;
-    if (rhash)
-        *rhash = shsigalgs->rhash;
-    return s->cert->shared_sigalgslen;
-}
-
-# ifndef OPENSSL_NO_HEARTBEATS
-int tls1_process_heartbeat(SSL *s)
-{
-    unsigned char *p = &s->s3->rrec.data[0], *pl;
-    unsigned short hbtype;
-    unsigned int payload;
-    unsigned int padding = 16;  /* Use minimum padding */
-
-    if (s->msg_callback)
-        s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
-                        &s->s3->rrec.data[0], s->s3->rrec.length,
-                        s, s->msg_callback_arg);
-
-    /* Read type and payload length first */
-    if (1 + 2 + 16 > s->s3->rrec.length)
-        return 0;               /* silently discard */
-    hbtype = *p++;
-    n2s(p, payload);
-    if (1 + 2 + payload + 16 > s->s3->rrec.length)
-        return 0;               /* silently discard per RFC 6520 sec. 4 */
-    pl = p;
-
-    if (hbtype == TLS1_HB_REQUEST) {
-        unsigned char *buffer, *bp;
-        int r;
-
-        /*
-         * Allocate memory for the response, size is 1 bytes message type,
-         * plus 2 bytes payload length, plus payload, plus padding
-         */
-        buffer = OPENSSL_malloc(1 + 2 + payload + padding);
-        if (buffer == NULL)
-            return -1;
-        bp = buffer;
-
-        /* Enter response type, length and copy payload */
-        *bp++ = TLS1_HB_RESPONSE;
-        s2n(payload, bp);
-        memcpy(bp, pl, payload);
-        bp += payload;
-        /* Random padding */
-        if (RAND_bytes(bp, padding) <= 0) {
-            OPENSSL_free(buffer);
-            return -1;
-        }
-
-        r = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buffer,
-                             3 + payload + padding);
-
-        if (r >= 0 && s->msg_callback)
-            s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
-                            buffer, 3 + payload + padding,
-                            s, s->msg_callback_arg);
-
-        OPENSSL_free(buffer);
-
-        if (r < 0)
-            return r;
-    } else if (hbtype == TLS1_HB_RESPONSE) {
-        unsigned int seq;
-
-        /*
-         * We only send sequence numbers (2 bytes unsigned int), and 16
-         * random bytes, so we just try to read the sequence number
-         */
-        n2s(pl, seq);
-
-        if (payload == 18 && seq == s->tlsext_hb_seq) {
-            s->tlsext_hb_seq++;
-            s->tlsext_hb_pending = 0;
-        }
-    }
-
-    return 0;
-}
-
-int tls1_heartbeat(SSL *s)
-{
-    unsigned char *buf, *p;
-    int ret = -1;
-    unsigned int payload = 18;  /* Sequence number + random bytes */
-    unsigned int padding = 16;  /* Use minimum padding */
-
-    /* Only send if peer supports and accepts HB requests... */
-    if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
-        s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS) {
-        SSLerr(SSL_F_TLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
-        return -1;
-    }
-
-    /* ...and there is none in flight yet... */
-    if (s->tlsext_hb_pending) {
-        SSLerr(SSL_F_TLS1_HEARTBEAT, SSL_R_TLS_HEARTBEAT_PENDING);
-        return -1;
-    }
-
-    /* ...and no handshake in progress. */
-    if (SSL_in_init(s) || s->in_handshake) {
-        SSLerr(SSL_F_TLS1_HEARTBEAT, SSL_R_UNEXPECTED_MESSAGE);
-        return -1;
-    }
-
-    /*
-     * Check if padding is too long, payload and padding must not exceed 2^14
-     * - 3 = 16381 bytes in total.
-     */
-    OPENSSL_assert(payload + padding <= 16381);
-
-    /*-
-     * Create HeartBeat message, we just use a sequence number
-     * as payload to distuingish different messages and add
-     * some random stuff.
-     *  - Message Type, 1 byte
-     *  - Payload Length, 2 bytes (unsigned int)
-     *  - Payload, the sequence number (2 bytes uint)
-     *  - Payload, random bytes (16 bytes uint)
-     *  - Padding
-     */
-    buf = OPENSSL_malloc(1 + 2 + payload + padding);
-    if (buf == NULL)
-        return -1;
-    p = buf;
-    /* Message Type */
-    *p++ = TLS1_HB_REQUEST;
-    /* Payload length (18 bytes here) */
-    s2n(payload, p);
-    /* Sequence number */
-    s2n(s->tlsext_hb_seq, p);
-    /* 16 random bytes */
-    if (RAND_bytes(p, 16) <= 0) {
-        SSLerr(SSL_F_TLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
-        goto err;
-    }
-    p += 16;
-    /* Random padding */
-    if (RAND_bytes(p, padding) <= 0) {
-        SSLerr(SSL_F_TLS1_HEARTBEAT, ERR_R_INTERNAL_ERROR);
-        goto err;
-    }
-
-    ret = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
-    if (ret >= 0) {
-        if (s->msg_callback)
-            s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
-                            buf, 3 + payload + padding,
-                            s, s->msg_callback_arg);
-
-        s->tlsext_hb_pending = 1;
-    }
-
-err:
-    OPENSSL_free(buf);
-
-    return ret;
-}
-# endif
-
-# define MAX_SIGALGLEN   (TLSEXT_hash_num * TLSEXT_signature_num * 2)
-
-typedef struct {
-    size_t sigalgcnt;
-    int sigalgs[MAX_SIGALGLEN];
-} sig_cb_st;
-
-static int sig_cb(const char *elem, int len, void *arg)
-{
-    sig_cb_st *sarg = arg;
-    size_t i;
-    char etmp[20], *p;
-    int sig_alg, hash_alg;
-    if (elem == NULL)
-        return 0;
-    if (sarg->sigalgcnt == MAX_SIGALGLEN)
-        return 0;
-    if (len > (int)(sizeof(etmp) - 1))
-        return 0;
-    memcpy(etmp, elem, len);
-    etmp[len] = 0;
-    p = strchr(etmp, '+');
-    if (!p)
-        return 0;
-    *p = 0;
-    p++;
-    if (!*p)
-        return 0;
-
-    if (!strcmp(etmp, "RSA"))
-        sig_alg = EVP_PKEY_RSA;
-    else if (!strcmp(etmp, "DSA"))
-        sig_alg = EVP_PKEY_DSA;
-    else if (!strcmp(etmp, "ECDSA"))
-        sig_alg = EVP_PKEY_EC;
-    else
-        return 0;
-
-    hash_alg = OBJ_sn2nid(p);
-    if (hash_alg == NID_undef)
-        hash_alg = OBJ_ln2nid(p);
-    if (hash_alg == NID_undef)
-        return 0;
-
-    for (i = 0; i < sarg->sigalgcnt; i += 2) {
-        if (sarg->sigalgs[i] == sig_alg && sarg->sigalgs[i + 1] == hash_alg)
-            return 0;
-    }
-    sarg->sigalgs[sarg->sigalgcnt++] = hash_alg;
-    sarg->sigalgs[sarg->sigalgcnt++] = sig_alg;
-    return 1;
-}
-
-/*
- * Set suppored signature algorithms based on a colon separated list of the
- * form sig+hash e.g. RSA+SHA512:DSA+SHA512
- */
-int tls1_set_sigalgs_list(CERT *c, const char *str, int client)
-{
-    sig_cb_st sig;
-    sig.sigalgcnt = 0;
-    if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
-        return 0;
-    if (c == NULL)
-        return 1;
-    return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt, client);
-}
-
-int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen,
-                     int client)
-{
-    unsigned char *sigalgs, *sptr;
-    int rhash, rsign;
-    size_t i;
-    if (salglen & 1)
-        return 0;
-    sigalgs = OPENSSL_malloc(salglen);
-    if (sigalgs == NULL)
-        return 0;
-    for (i = 0, sptr = sigalgs; i < salglen; i += 2) {
-        rhash = tls12_find_id(*psig_nids++, tls12_md,
-                              sizeof(tls12_md) / sizeof(tls12_lookup));
-        rsign = tls12_find_id(*psig_nids++, tls12_sig,
-                              sizeof(tls12_sig) / sizeof(tls12_lookup));
-
-        if (rhash == -1 || rsign == -1)
-            goto err;
-        *sptr++ = rhash;
-        *sptr++ = rsign;
-    }
-
-    if (client) {
-        if (c->client_sigalgs)
-            OPENSSL_free(c->client_sigalgs);
-        c->client_sigalgs = sigalgs;
-        c->client_sigalgslen = salglen;
-    } else {
-        if (c->conf_sigalgs)
-            OPENSSL_free(c->conf_sigalgs);
-        c->conf_sigalgs = sigalgs;
-        c->conf_sigalgslen = salglen;
-    }
-
-    return 1;
-
- err:
-    OPENSSL_free(sigalgs);
-    return 0;
-}
-
-static int tls1_check_sig_alg(CERT *c, X509 *x, int default_nid)
-{
-    int sig_nid;
-    size_t i;
-    if (default_nid == -1)
-        return 1;
-    sig_nid = X509_get_signature_nid(x);
-    if (default_nid)
-        return sig_nid == default_nid ? 1 : 0;
-    for (i = 0; i < c->shared_sigalgslen; i++)
-        if (sig_nid == c->shared_sigalgs[i].signandhash_nid)
-            return 1;
-    return 0;
-}
-
-/* Check to see if a certificate issuer name matches list of CA names */
-static int ssl_check_ca_name(STACK_OF(X509_NAME) *names, X509 *x)
-{
-    X509_NAME *nm;
-    int i;
-    nm = X509_get_issuer_name(x);
-    for (i = 0; i < sk_X509_NAME_num(names); i++) {
-        if (!X509_NAME_cmp(nm, sk_X509_NAME_value(names, i)))
-            return 1;
-    }
-    return 0;
-}
-
-/*
- * Check certificate chain is consistent with TLS extensions and is usable by
- * server. This servers two purposes: it allows users to check chains before
- * passing them to the server and it allows the server to check chains before
- * attempting to use them.
- */
-
-/* Flags which need to be set for a certificate when stict mode not set */
-
-# define CERT_PKEY_VALID_FLAGS \
-        (CERT_PKEY_EE_SIGNATURE|CERT_PKEY_EE_PARAM)
-/* Strict mode flags */
-# define CERT_PKEY_STRICT_FLAGS \
-         (CERT_PKEY_VALID_FLAGS|CERT_PKEY_CA_SIGNATURE|CERT_PKEY_CA_PARAM \
-         | CERT_PKEY_ISSUER_NAME|CERT_PKEY_CERT_TYPE)
-
-int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain,
-                     int idx)
-{
-    int i;
-    int rv = 0;
-    int check_flags = 0, strict_mode;
-    CERT_PKEY *cpk = NULL;
-    CERT *c = s->cert;
-    unsigned int suiteb_flags = tls1_suiteb(s);
-    /* idx == -1 means checking server chains */
-    if (idx != -1) {
-        /* idx == -2 means checking client certificate chains */
-        if (idx == -2) {
-            cpk = c->key;
-            idx = cpk - c->pkeys;
-        } else
-            cpk = c->pkeys + idx;
-        x = cpk->x509;
-        pk = cpk->privatekey;
-        chain = cpk->chain;
-        strict_mode = c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT;
-        /* If no cert or key, forget it */
-        if (!x || !pk)
-            goto end;
-# ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
-        /* Allow any certificate to pass test */
-        if (s->cert->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL) {
-            rv = CERT_PKEY_STRICT_FLAGS | CERT_PKEY_EXPLICIT_SIGN |
-                CERT_PKEY_VALID | CERT_PKEY_SIGN;
-            cpk->valid_flags = rv;
-            return rv;
-        }
-# endif
-    } else {
-        if (!x || !pk)
-            return 0;
-        idx = ssl_cert_type(x, pk);
-        if (idx == -1)
-            return 0;
-        cpk = c->pkeys + idx;
-        if (c->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
-            check_flags = CERT_PKEY_STRICT_FLAGS;
-        else
-            check_flags = CERT_PKEY_VALID_FLAGS;
-        strict_mode = 1;
-    }
-
-    if (suiteb_flags) {
-        int ok;
-        if (check_flags)
-            check_flags |= CERT_PKEY_SUITEB;
-        ok = X509_chain_check_suiteb(NULL, x, chain, suiteb_flags);
-        if (ok == X509_V_OK)
-            rv |= CERT_PKEY_SUITEB;
-        else if (!check_flags)
-            goto end;
-    }
-
-    /*
-     * Check all signature algorithms are consistent with signature
-     * algorithms extension if TLS 1.2 or later and strict mode.
-     */
-    if (TLS1_get_version(s) >= TLS1_2_VERSION && strict_mode) {
-        int default_nid;
-        unsigned char rsign = 0;
-        if (c->peer_sigalgs)
-            default_nid = 0;
-        /* If no sigalgs extension use defaults from RFC5246 */
-        else {
-            switch (idx) {
-            case SSL_PKEY_RSA_ENC:
-            case SSL_PKEY_RSA_SIGN:
-            case SSL_PKEY_DH_RSA:
-                rsign = TLSEXT_signature_rsa;
-                default_nid = NID_sha1WithRSAEncryption;
-                break;
-
-            case SSL_PKEY_DSA_SIGN:
-            case SSL_PKEY_DH_DSA:
-                rsign = TLSEXT_signature_dsa;
-                default_nid = NID_dsaWithSHA1;
-                break;
-
-            case SSL_PKEY_ECC:
-                rsign = TLSEXT_signature_ecdsa;
-                default_nid = NID_ecdsa_with_SHA1;
-                break;
-
-            default:
-                default_nid = -1;
-                break;
-            }
-        }
-        /*
-         * If peer sent no signature algorithms extension and we have set
-         * preferred signature algorithms check we support sha1.
-         */
-        if (default_nid > 0 && c->conf_sigalgs) {
-            size_t j;
-            const unsigned char *p = c->conf_sigalgs;
-            for (j = 0; j < c->conf_sigalgslen; j += 2, p += 2) {
-                if (p[0] == TLSEXT_hash_sha1 && p[1] == rsign)
-                    break;
-            }
-            if (j == c->conf_sigalgslen) {
-                if (check_flags)
-                    goto skip_sigs;
-                else
-                    goto end;
-            }
-        }
-        /* Check signature algorithm of each cert in chain */
-        if (!tls1_check_sig_alg(c, x, default_nid)) {
-            if (!check_flags)
-                goto end;
-        } else
-            rv |= CERT_PKEY_EE_SIGNATURE;
-        rv |= CERT_PKEY_CA_SIGNATURE;
-        for (i = 0; i < sk_X509_num(chain); i++) {
-            if (!tls1_check_sig_alg(c, sk_X509_value(chain, i), default_nid)) {
-                if (check_flags) {
-                    rv &= ~CERT_PKEY_CA_SIGNATURE;
-                    break;
-                } else
-                    goto end;
-            }
-        }
-    }
-    /* Else not TLS 1.2, so mark EE and CA signing algorithms OK */
-    else if (check_flags)
-        rv |= CERT_PKEY_EE_SIGNATURE | CERT_PKEY_CA_SIGNATURE;
- skip_sigs:
-    /* Check cert parameters are consistent */
-    if (tls1_check_cert_param(s, x, check_flags ? 1 : 2))
-        rv |= CERT_PKEY_EE_PARAM;
-    else if (!check_flags)
-        goto end;
-    if (!s->server)
-        rv |= CERT_PKEY_CA_PARAM;
-    /* In strict mode check rest of chain too */
-    else if (strict_mode) {
-        rv |= CERT_PKEY_CA_PARAM;
-        for (i = 0; i < sk_X509_num(chain); i++) {
-            X509 *ca = sk_X509_value(chain, i);
-            if (!tls1_check_cert_param(s, ca, 0)) {
-                if (check_flags) {
-                    rv &= ~CERT_PKEY_CA_PARAM;
-                    break;
-                } else
-                    goto end;
-            }
-        }
-    }
-    if (!s->server && strict_mode) {
-        STACK_OF(X509_NAME) *ca_dn;
-        int check_type = 0;
-        switch (pk->type) {
-        case EVP_PKEY_RSA:
-            check_type = TLS_CT_RSA_SIGN;
-            break;
-        case EVP_PKEY_DSA:
-            check_type = TLS_CT_DSS_SIGN;
-            break;
-        case EVP_PKEY_EC:
-            check_type = TLS_CT_ECDSA_SIGN;
-            break;
-        case EVP_PKEY_DH:
-        case EVP_PKEY_DHX:
-            {
-                int cert_type = X509_certificate_type(x, pk);
-                if (cert_type & EVP_PKS_RSA)
-                    check_type = TLS_CT_RSA_FIXED_DH;
-                if (cert_type & EVP_PKS_DSA)
-                    check_type = TLS_CT_DSS_FIXED_DH;
-            }
-        }
-        if (check_type) {
-            const unsigned char *ctypes;
-            int ctypelen;
-            if (c->ctypes) {
-                ctypes = c->ctypes;
-                ctypelen = (int)c->ctype_num;
-            } else {
-                ctypes = (unsigned char *)s->s3->tmp.ctype;
-                ctypelen = s->s3->tmp.ctype_num;
-            }
-            for (i = 0; i < ctypelen; i++) {
-                if (ctypes[i] == check_type) {
-                    rv |= CERT_PKEY_CERT_TYPE;
-                    break;
-                }
-            }
-            if (!(rv & CERT_PKEY_CERT_TYPE) && !check_flags)
-                goto end;
-        } else
-            rv |= CERT_PKEY_CERT_TYPE;
-
-        ca_dn = s->s3->tmp.ca_names;
-
-        if (!sk_X509_NAME_num(ca_dn))
-            rv |= CERT_PKEY_ISSUER_NAME;
-
-        if (!(rv & CERT_PKEY_ISSUER_NAME)) {
-            if (ssl_check_ca_name(ca_dn, x))
-                rv |= CERT_PKEY_ISSUER_NAME;
-        }
-        if (!(rv & CERT_PKEY_ISSUER_NAME)) {
-            for (i = 0; i < sk_X509_num(chain); i++) {
-                X509 *xtmp = sk_X509_value(chain, i);
-                if (ssl_check_ca_name(ca_dn, xtmp)) {
-                    rv |= CERT_PKEY_ISSUER_NAME;
-                    break;
-                }
-            }
-        }
-        if (!check_flags && !(rv & CERT_PKEY_ISSUER_NAME))
-            goto end;
-    } else
-        rv |= CERT_PKEY_ISSUER_NAME | CERT_PKEY_CERT_TYPE;
-
-    if (!check_flags || (rv & check_flags) == check_flags)
-        rv |= CERT_PKEY_VALID;
-
- end:
-
-    if (TLS1_get_version(s) >= TLS1_2_VERSION) {
-        if (cpk->valid_flags & CERT_PKEY_EXPLICIT_SIGN)
-            rv |= CERT_PKEY_EXPLICIT_SIGN | CERT_PKEY_SIGN;
-        else if (cpk->digest)
-            rv |= CERT_PKEY_SIGN;
-    } else
-        rv |= CERT_PKEY_SIGN | CERT_PKEY_EXPLICIT_SIGN;
-
-    /*
-     * When checking a CERT_PKEY structure all flags are irrelevant if the
-     * chain is invalid.
-     */
-    if (!check_flags) {
-        if (rv & CERT_PKEY_VALID)
-            cpk->valid_flags = rv;
-        else {
-            /* Preserve explicit sign flag, clear rest */
-            cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
-            return 0;
-        }
-    }
-    return rv;
-}
-
-/* Set validity of certificates in an SSL structure */
-void tls1_set_cert_validity(SSL *s)
-{
-    tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_ENC);
-    tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_SIGN);
-    tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
-    tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DH_RSA);
-    tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DH_DSA);
-    tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);
-}
-
-/* User level utiity function to check a chain is suitable */
-int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
-{
-    return tls1_check_chain(s, x, pk, chain, -1);
-}
-
-#endif