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Diffstat (limited to 'src/crypto/evp/sign.c')
| -rw-r--r-- | src/crypto/evp/sign.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/crypto/evp/sign.c b/src/crypto/evp/sign.c new file mode 100644 index 0000000..1faf7c6 --- /dev/null +++ b/src/crypto/evp/sign.c @@ -0,0 +1,151 @@ +/* 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.] */ + +#include <openssl/evp.h> + +#include <openssl/digest.h> +#include <openssl/err.h> + +#include "internal.h" + + +int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { + return EVP_DigestInit_ex(ctx, type, impl); +} + +int EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type) { + return EVP_DigestInit(ctx, type); +} + +int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { + return EVP_DigestUpdate(ctx, data, len); +} + +int EVP_SignFinal(const EVP_MD_CTX *ctx, uint8_t *sig, + unsigned int *out_sig_len, EVP_PKEY *pkey) { + uint8_t m[EVP_MAX_MD_SIZE]; + unsigned int m_len; + int ret = 0; + EVP_MD_CTX tmp_ctx; + EVP_PKEY_CTX *pkctx = NULL; + size_t sig_len = EVP_PKEY_size(pkey); + + *out_sig_len = 0; + EVP_MD_CTX_init(&tmp_ctx); + if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) || + !EVP_DigestFinal_ex(&tmp_ctx, m, &m_len)) { + goto out; + } + EVP_MD_CTX_cleanup(&tmp_ctx); + + pkctx = EVP_PKEY_CTX_new(pkey, NULL); + if (!pkctx || EVP_PKEY_sign_init(pkctx) <= 0 || + EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0 || + EVP_PKEY_sign(pkctx, sig, &sig_len, m, m_len) <= 0) { + goto out; + } + *out_sig_len = sig_len; + ret = 1; + +out: + if (pkctx) { + EVP_PKEY_CTX_free(pkctx); + } + + return ret; +} + +int EVP_VerifyInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { + return EVP_DigestInit_ex(ctx, type, impl); +} + +int EVP_VerifyInit(EVP_MD_CTX *ctx, const EVP_MD *type) { + return EVP_DigestInit(ctx, type); +} + +int EVP_VerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { + return EVP_DigestUpdate(ctx, data, len); +} + +int EVP_VerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig, size_t sig_len, + EVP_PKEY *pkey) { + uint8_t m[EVP_MAX_MD_SIZE]; + unsigned int m_len; + int ret = 0; + EVP_MD_CTX tmp_ctx; + EVP_PKEY_CTX *pkctx = NULL; + + EVP_MD_CTX_init(&tmp_ctx); + if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) || + !EVP_DigestFinal_ex(&tmp_ctx, m, &m_len)) { + EVP_MD_CTX_cleanup(&tmp_ctx); + goto out; + } + EVP_MD_CTX_cleanup(&tmp_ctx); + + pkctx = EVP_PKEY_CTX_new(pkey, NULL); + if (!pkctx || + EVP_PKEY_verify_init(pkctx) <= 0 || + EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0) { + goto out; + } + ret = EVP_PKEY_verify(pkctx, sig, sig_len, m, m_len); + +out: + EVP_PKEY_CTX_free(pkctx); + return ret; +} + |