diff options
Diffstat (limited to 'openssl/crypto/dsa/dsa_ameth.c')
| -rw-r--r-- | openssl/crypto/dsa/dsa_ameth.c | 678 |
1 files changed, 678 insertions, 0 deletions
diff --git a/openssl/crypto/dsa/dsa_ameth.c b/openssl/crypto/dsa/dsa_ameth.c new file mode 100644 index 0000000..c4fa105 --- /dev/null +++ b/openssl/crypto/dsa/dsa_ameth.c @@ -0,0 +1,678 @@ +/* + * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project + * 2006. + */ +/* ==================================================================== + * Copyright (c) 2006 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 + * licensing@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 "cryptlib.h" +#include <openssl/x509.h> +#include <openssl/asn1.h> +#include <openssl/dsa.h> +#include <openssl/bn.h> +#ifndef OPENSSL_NO_CMS +# include <openssl/cms.h> +#endif +#include "asn1_locl.h" + +static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) +{ + const unsigned char *p, *pm; + int pklen, pmlen; + int ptype; + void *pval; + ASN1_STRING *pstr; + X509_ALGOR *palg; + ASN1_INTEGER *public_key = NULL; + + DSA *dsa = NULL; + + if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey)) + return 0; + X509_ALGOR_get0(NULL, &ptype, &pval, palg); + + if (ptype == V_ASN1_SEQUENCE) { + pstr = pval; + pm = pstr->data; + pmlen = pstr->length; + + if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) { + DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR); + goto err; + } + + } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) { + if (!(dsa = DSA_new())) { + DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE); + goto err; + } + } else { + DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR); + goto err; + } + + if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) { + DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR); + goto err; + } + + if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) { + DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR); + goto err; + } + + ASN1_INTEGER_free(public_key); + EVP_PKEY_assign_DSA(pkey, dsa); + return 1; + + err: + if (public_key) + ASN1_INTEGER_free(public_key); + if (dsa) + DSA_free(dsa); + return 0; + +} + +static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) +{ + DSA *dsa; + int ptype; + unsigned char *penc = NULL; + int penclen; + ASN1_STRING *str = NULL; + + dsa = pkey->pkey.dsa; + if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) { + str = ASN1_STRING_new(); + if (!str) { + DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); + goto err; + } + str->length = i2d_DSAparams(dsa, &str->data); + if (str->length <= 0) { + DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); + goto err; + } + ptype = V_ASN1_SEQUENCE; + } else + ptype = V_ASN1_UNDEF; + + dsa->write_params = 0; + + penclen = i2d_DSAPublicKey(dsa, &penc); + + if (penclen <= 0) { + DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA), + ptype, str, penc, penclen)) + return 1; + + err: + if (penc) + OPENSSL_free(penc); + if (str) + ASN1_STRING_free(str); + + return 0; +} + +/* + * In PKCS#8 DSA: you just get a private key integer and parameters in the + * AlgorithmIdentifier the pubkey must be recalculated. + */ + +static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) +{ + const unsigned char *p, *pm; + int pklen, pmlen; + int ptype; + void *pval; + ASN1_STRING *pstr; + X509_ALGOR *palg; + ASN1_INTEGER *privkey = NULL; + BN_CTX *ctx = NULL; + + STACK_OF(ASN1_TYPE) *ndsa = NULL; + DSA *dsa = NULL; + + int ret = 0; + + if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8)) + return 0; + X509_ALGOR_get0(NULL, &ptype, &pval, palg); + + /* Check for broken DSA PKCS#8, UGH! */ + if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) { + ASN1_TYPE *t1, *t2; + if (!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen))) + goto decerr; + if (sk_ASN1_TYPE_num(ndsa) != 2) + goto decerr; + /*- + * Handle Two broken types: + * SEQUENCE {parameters, priv_key} + * SEQUENCE {pub_key, priv_key} + */ + + t1 = sk_ASN1_TYPE_value(ndsa, 0); + t2 = sk_ASN1_TYPE_value(ndsa, 1); + if (t1->type == V_ASN1_SEQUENCE) { + p8->broken = PKCS8_EMBEDDED_PARAM; + pval = t1->value.ptr; + } else if (ptype == V_ASN1_SEQUENCE) + p8->broken = PKCS8_NS_DB; + else + goto decerr; + + if (t2->type != V_ASN1_INTEGER) + goto decerr; + + privkey = t2->value.integer; + } else { + const unsigned char *q = p; + if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen))) + goto decerr; + if (privkey->type == V_ASN1_NEG_INTEGER) { + p8->broken = PKCS8_NEG_PRIVKEY; + ASN1_STRING_clear_free(privkey); + if (!(privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen))) + goto decerr; + } + if (ptype != V_ASN1_SEQUENCE) + goto decerr; + } + + pstr = pval; + pm = pstr->data; + pmlen = pstr->length; + if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) + goto decerr; + /* We have parameters now set private key */ + if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) { + DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR); + goto dsaerr; + } + /* Calculate public key */ + if (!(dsa->pub_key = BN_new())) { + DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE); + goto dsaerr; + } + if (!(ctx = BN_CTX_new())) { + DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE); + goto dsaerr; + } + + if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) { + DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR); + goto dsaerr; + } + + EVP_PKEY_assign_DSA(pkey, dsa); + + ret = 1; + goto done; + + decerr: + DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR); + dsaerr: + DSA_free(dsa); + done: + BN_CTX_free(ctx); + if (ndsa) + sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free); + else + ASN1_STRING_clear_free(privkey); + return ret; +} + +static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) +{ + ASN1_STRING *params = NULL; + ASN1_INTEGER *prkey = NULL; + unsigned char *dp = NULL; + int dplen; + + if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) { + DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS); + goto err; + } + + params = ASN1_STRING_new(); + + if (!params) { + DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); + goto err; + } + + params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data); + if (params->length <= 0) { + DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); + goto err; + } + params->type = V_ASN1_SEQUENCE; + + /* Get private key into integer */ + prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL); + + if (!prkey) { + DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR); + goto err; + } + + dplen = i2d_ASN1_INTEGER(prkey, &dp); + + ASN1_STRING_clear_free(prkey); + prkey = NULL; + + if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0, + V_ASN1_SEQUENCE, params, dp, dplen)) + goto err; + + return 1; + + err: + if (dp != NULL) + OPENSSL_free(dp); + if (params != NULL) + ASN1_STRING_free(params); + if (prkey != NULL) + ASN1_STRING_clear_free(prkey); + return 0; +} + +static int int_dsa_size(const EVP_PKEY *pkey) +{ + return (DSA_size(pkey->pkey.dsa)); +} + +static int dsa_bits(const EVP_PKEY *pkey) +{ + return BN_num_bits(pkey->pkey.dsa->p); +} + +static int dsa_missing_parameters(const EVP_PKEY *pkey) +{ + DSA *dsa; + dsa = pkey->pkey.dsa; + if (dsa == NULL || dsa->p == NULL || dsa->q == NULL || dsa->g == NULL) + return 1; + return 0; +} + +static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) +{ + BIGNUM *a; + + if ((a = BN_dup(from->pkey.dsa->p)) == NULL) + return 0; + if (to->pkey.dsa->p != NULL) + BN_free(to->pkey.dsa->p); + to->pkey.dsa->p = a; + + if ((a = BN_dup(from->pkey.dsa->q)) == NULL) + return 0; + if (to->pkey.dsa->q != NULL) + BN_free(to->pkey.dsa->q); + to->pkey.dsa->q = a; + + if ((a = BN_dup(from->pkey.dsa->g)) == NULL) + return 0; + if (to->pkey.dsa->g != NULL) + BN_free(to->pkey.dsa->g); + to->pkey.dsa->g = a; + return 1; +} + +static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) +{ + if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) || + BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) || + BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g)) + return 0; + else + return 1; +} + +static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) +{ + if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0) + return 0; + else + return 1; +} + +static void int_dsa_free(EVP_PKEY *pkey) +{ + DSA_free(pkey->pkey.dsa); +} + +static void update_buflen(const BIGNUM *b, size_t *pbuflen) +{ + size_t i; + if (!b) + return; + if (*pbuflen < (i = (size_t)BN_num_bytes(b))) + *pbuflen = i; +} + +static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype) +{ + unsigned char *m = NULL; + int ret = 0; + size_t buf_len = 0; + const char *ktype = NULL; + + const BIGNUM *priv_key, *pub_key; + + if (ptype == 2) + priv_key = x->priv_key; + else + priv_key = NULL; + + if (ptype > 0) + pub_key = x->pub_key; + else + pub_key = NULL; + + if (ptype == 2) + ktype = "Private-Key"; + else if (ptype == 1) + ktype = "Public-Key"; + else + ktype = "DSA-Parameters"; + + update_buflen(x->p, &buf_len); + update_buflen(x->q, &buf_len); + update_buflen(x->g, &buf_len); + update_buflen(priv_key, &buf_len); + update_buflen(pub_key, &buf_len); + + m = (unsigned char *)OPENSSL_malloc(buf_len + 10); + if (m == NULL) { + DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (priv_key) { + if (!BIO_indent(bp, off, 128)) + goto err; + if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p)) + <= 0) + goto err; + } + + if (!ASN1_bn_print(bp, "priv:", priv_key, m, off)) + goto err; + if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off)) + goto err; + if (!ASN1_bn_print(bp, "P: ", x->p, m, off)) + goto err; + if (!ASN1_bn_print(bp, "Q: ", x->q, m, off)) + goto err; + if (!ASN1_bn_print(bp, "G: ", x->g, m, off)) + goto err; + ret = 1; + err: + if (m != NULL) + OPENSSL_free(m); + return (ret); +} + +static int dsa_param_decode(EVP_PKEY *pkey, + const unsigned char **pder, int derlen) +{ + DSA *dsa; + if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) { + DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB); + return 0; + } + EVP_PKEY_assign_DSA(pkey, dsa); + return 1; +} + +static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder) +{ + return i2d_DSAparams(pkey->pkey.dsa, pder); +} + +static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, + ASN1_PCTX *ctx) +{ + return do_dsa_print(bp, pkey->pkey.dsa, indent, 0); +} + +static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, + ASN1_PCTX *ctx) +{ + return do_dsa_print(bp, pkey->pkey.dsa, indent, 1); +} + +static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, + ASN1_PCTX *ctx) +{ + return do_dsa_print(bp, pkey->pkey.dsa, indent, 2); +} + +static int old_dsa_priv_decode(EVP_PKEY *pkey, + const unsigned char **pder, int derlen) +{ + DSA *dsa; + if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) { + DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB); + return 0; + } + EVP_PKEY_assign_DSA(pkey, dsa); + return 1; +} + +static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) +{ + return i2d_DSAPrivateKey(pkey->pkey.dsa, pder); +} + +static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, + const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx) +{ + DSA_SIG *dsa_sig; + const unsigned char *p; + if (!sig) { + if (BIO_puts(bp, "\n") <= 0) + return 0; + else + return 1; + } + p = sig->data; + dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length); + if (dsa_sig) { + int rv = 0; + size_t buf_len = 0; + unsigned char *m = NULL; + update_buflen(dsa_sig->r, &buf_len); + update_buflen(dsa_sig->s, &buf_len); + m = OPENSSL_malloc(buf_len + 10); + if (m == NULL) { + DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (BIO_write(bp, "\n", 1) != 1) + goto err; + + if (!ASN1_bn_print(bp, "r: ", dsa_sig->r, m, indent)) + goto err; + if (!ASN1_bn_print(bp, "s: ", dsa_sig->s, m, indent)) + goto err; + rv = 1; + err: + if (m) + OPENSSL_free(m); + DSA_SIG_free(dsa_sig); + return rv; + } + return X509_signature_dump(bp, sig, indent); +} + +static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) +{ + switch (op) { + case ASN1_PKEY_CTRL_PKCS7_SIGN: + if (arg1 == 0) { + int snid, hnid; + X509_ALGOR *alg1, *alg2; + PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2); + if (alg1 == NULL || alg1->algorithm == NULL) + return -1; + hnid = OBJ_obj2nid(alg1->algorithm); + if (hnid == NID_undef) + return -1; + if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) + return -1; + X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); + } + return 1; +#ifndef OPENSSL_NO_CMS + case ASN1_PKEY_CTRL_CMS_SIGN: + if (arg1 == 0) { + int snid, hnid; + X509_ALGOR *alg1, *alg2; + CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2); + if (alg1 == NULL || alg1->algorithm == NULL) + return -1; + hnid = OBJ_obj2nid(alg1->algorithm); + if (hnid == NID_undef) + return -1; + if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey))) + return -1; + X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0); + } + return 1; + + case ASN1_PKEY_CTRL_CMS_RI_TYPE: + *(int *)arg2 = CMS_RECIPINFO_NONE; + return 1; +#endif + + case ASN1_PKEY_CTRL_DEFAULT_MD_NID: + *(int *)arg2 = NID_sha256; + return 2; + + default: + return -2; + + } + +} + +/* NB these are sorted in pkey_id order, lowest first */ + +const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = { + + { + EVP_PKEY_DSA2, + EVP_PKEY_DSA, + ASN1_PKEY_ALIAS}, + + { + EVP_PKEY_DSA1, + EVP_PKEY_DSA, + ASN1_PKEY_ALIAS}, + + { + EVP_PKEY_DSA4, + EVP_PKEY_DSA, + ASN1_PKEY_ALIAS}, + + { + EVP_PKEY_DSA3, + EVP_PKEY_DSA, + ASN1_PKEY_ALIAS}, + + { + EVP_PKEY_DSA, + EVP_PKEY_DSA, + 0, + + "DSA", + "OpenSSL DSA method", + + dsa_pub_decode, + dsa_pub_encode, + dsa_pub_cmp, + dsa_pub_print, + + dsa_priv_decode, + dsa_priv_encode, + dsa_priv_print, + + int_dsa_size, + dsa_bits, + + dsa_param_decode, + dsa_param_encode, + dsa_missing_parameters, + dsa_copy_parameters, + dsa_cmp_parameters, + dsa_param_print, + dsa_sig_print, + + int_dsa_free, + dsa_pkey_ctrl, + old_dsa_priv_decode, + old_dsa_priv_encode} +}; |