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Diffstat (limited to 'openssl/crypto/asn1/a_sign.c')
| -rw-r--r-- | openssl/crypto/asn1/a_sign.c | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/a_sign.c b/openssl/crypto/asn1/a_sign.c new file mode 100644 index 0000000..51c6a0c --- /dev/null +++ b/openssl/crypto/asn1/a_sign.c @@ -0,0 +1,331 @@ +/* crypto/asn1/a_sign.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) 1998-2003 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 <time.h> + +#include "cryptlib.h" + +#ifndef NO_SYS_TYPES_H +# include <sys/types.h> +#endif + +#include <openssl/bn.h> +#include <openssl/evp.h> +#include <openssl/x509.h> +#include <openssl/objects.h> +#include <openssl/buffer.h> +#include "asn1_locl.h" + +#ifndef NO_ASN1_OLD + +int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2, + ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey, + const EVP_MD *type) +{ + EVP_MD_CTX ctx; + unsigned char *p, *buf_in = NULL, *buf_out = NULL; + int i, inl = 0, outl = 0, outll = 0; + X509_ALGOR *a; + + EVP_MD_CTX_init(&ctx); + for (i = 0; i < 2; i++) { + if (i == 0) + a = algor1; + else + a = algor2; + if (a == NULL) + continue; + if (type->pkey_type == NID_dsaWithSHA1) { + /* + * special case: RFC 2459 tells us to omit 'parameters' with + * id-dsa-with-sha1 + */ + ASN1_TYPE_free(a->parameter); + a->parameter = NULL; + } else if ((a->parameter == NULL) || + (a->parameter->type != V_ASN1_NULL)) { + ASN1_TYPE_free(a->parameter); + if ((a->parameter = ASN1_TYPE_new()) == NULL) + goto err; + a->parameter->type = V_ASN1_NULL; + } + ASN1_OBJECT_free(a->algorithm); + a->algorithm = OBJ_nid2obj(type->pkey_type); + if (a->algorithm == NULL) { + ASN1err(ASN1_F_ASN1_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE); + goto err; + } + if (a->algorithm->length == 0) { + ASN1err(ASN1_F_ASN1_SIGN, + ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); + goto err; + } + } + inl = i2d(data, NULL); + buf_in = (unsigned char *)OPENSSL_malloc((unsigned int)inl); + outll = outl = EVP_PKEY_size(pkey); + buf_out = (unsigned char *)OPENSSL_malloc((unsigned int)outl); + if ((buf_in == NULL) || (buf_out == NULL)) { + outl = 0; + ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE); + goto err; + } + p = buf_in; + + i2d(data, &p); + if (!EVP_SignInit_ex(&ctx, type, NULL) + || !EVP_SignUpdate(&ctx, (unsigned char *)buf_in, inl) + || !EVP_SignFinal(&ctx, (unsigned char *)buf_out, + (unsigned int *)&outl, pkey)) { + outl = 0; + ASN1err(ASN1_F_ASN1_SIGN, ERR_R_EVP_LIB); + goto err; + } + if (signature->data != NULL) + OPENSSL_free(signature->data); + signature->data = buf_out; + buf_out = NULL; + signature->length = outl; + /* + * In the interests of compatibility, I'll make sure that the bit string + * has a 'not-used bits' value of 0 + */ + signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); + signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; + err: + EVP_MD_CTX_cleanup(&ctx); + if (buf_in != NULL) { + OPENSSL_cleanse((char *)buf_in, (unsigned int)inl); + OPENSSL_free(buf_in); + } + if (buf_out != NULL) { + OPENSSL_cleanse((char *)buf_out, outll); + OPENSSL_free(buf_out); + } + return (outl); +} + +#endif + +int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, + X509_ALGOR *algor2, ASN1_BIT_STRING *signature, void *asn, + EVP_PKEY *pkey, const EVP_MD *type) +{ + EVP_MD_CTX ctx; + EVP_MD_CTX_init(&ctx); + if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey)) { + EVP_MD_CTX_cleanup(&ctx); + return 0; + } + return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx); +} + +int ASN1_item_sign_ctx(const ASN1_ITEM *it, + X509_ALGOR *algor1, X509_ALGOR *algor2, + ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx) +{ + const EVP_MD *type; + EVP_PKEY *pkey; + unsigned char *buf_in = NULL, *buf_out = NULL; + size_t inl = 0, outl = 0, outll = 0; + int signid, paramtype; + int rv; + + type = EVP_MD_CTX_md(ctx); + pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); + + if (!type || !pkey) { + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED); + return 0; + } + + if (pkey->ameth->item_sign) { + rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2, signature); + if (rv == 1) + outl = signature->length; + /*- + * Return value meanings: + * <=0: error. + * 1: method does everything. + * 2: carry on as normal. + * 3: ASN1 method sets algorithm identifiers: just sign. + */ + if (rv <= 0) + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB); + if (rv <= 1) + goto err; + } else + rv = 2; + + if (rv == 2) { + if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) { + if (!pkey->ameth || + !OBJ_find_sigid_by_algs(&signid, + EVP_MD_nid(type), + pkey->ameth->pkey_id)) { + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, + ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); + return 0; + } + } else + signid = type->pkey_type; + + if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) + paramtype = V_ASN1_NULL; + else + paramtype = V_ASN1_UNDEF; + + if (algor1) + X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL); + if (algor2) + X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL); + + } + + inl = ASN1_item_i2d(asn, &buf_in, it); + outll = outl = EVP_PKEY_size(pkey); + buf_out = OPENSSL_malloc((unsigned int)outl); + if ((buf_in == NULL) || (buf_out == NULL)) { + outl = 0; + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_MALLOC_FAILURE); + goto err; + } + + if (!EVP_DigestSignUpdate(ctx, buf_in, inl) + || !EVP_DigestSignFinal(ctx, buf_out, &outl)) { + outl = 0; + ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB); + goto err; + } + if (signature->data != NULL) + OPENSSL_free(signature->data); + signature->data = buf_out; + buf_out = NULL; + signature->length = outl; + /* + * In the interests of compatibility, I'll make sure that the bit string + * has a 'not-used bits' value of 0 + */ + signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); + signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; + err: + EVP_MD_CTX_cleanup(ctx); + if (buf_in != NULL) { + OPENSSL_cleanse((char *)buf_in, (unsigned int)inl); + OPENSSL_free(buf_in); + } + if (buf_out != NULL) { + OPENSSL_cleanse((char *)buf_out, outll); + OPENSSL_free(buf_out); + } + return (outl); +} |