1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57 #include <openssl/evp.h> 58 59 #include <openssl/digest.h> 60 #include <openssl/err.h> 61 62 #include "internal.h" 63 64 65 int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { 66 return EVP_DigestInit_ex(ctx, type, impl); 67 } 68 69 int EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type) { 70 return EVP_DigestInit(ctx, type); 71 } 72 73 int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { 74 return EVP_DigestUpdate(ctx, data, len); 75 } 76 77 int EVP_SignFinal(const EVP_MD_CTX *ctx, uint8_t *sig, 78 unsigned int *out_sig_len, EVP_PKEY *pkey) { 79 uint8_t m[EVP_MAX_MD_SIZE]; 80 unsigned int m_len; 81 int ret = 0; 82 EVP_MD_CTX tmp_ctx; 83 EVP_PKEY_CTX *pkctx = NULL; 84 size_t sig_len = EVP_PKEY_size(pkey); 85 86 *out_sig_len = 0; 87 EVP_MD_CTX_init(&tmp_ctx); 88 if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) || 89 !EVP_DigestFinal_ex(&tmp_ctx, m, &m_len)) { 90 goto out; 91 } 92 EVP_MD_CTX_cleanup(&tmp_ctx); 93 94 pkctx = EVP_PKEY_CTX_new(pkey, NULL); 95 if (!pkctx || !EVP_PKEY_sign_init(pkctx) || 96 !EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) || 97 !EVP_PKEY_sign(pkctx, sig, &sig_len, m, m_len)) { 98 goto out; 99 } 100 *out_sig_len = sig_len; 101 ret = 1; 102 103 out: 104 if (pkctx) { 105 EVP_PKEY_CTX_free(pkctx); 106 } 107 108 return ret; 109 } 110 111 int EVP_VerifyInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { 112 return EVP_DigestInit_ex(ctx, type, impl); 113 } 114 115 int EVP_VerifyInit(EVP_MD_CTX *ctx, const EVP_MD *type) { 116 return EVP_DigestInit(ctx, type); 117 } 118 119 int EVP_VerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { 120 return EVP_DigestUpdate(ctx, data, len); 121 } 122 123 int EVP_VerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig, size_t sig_len, 124 EVP_PKEY *pkey) { 125 uint8_t m[EVP_MAX_MD_SIZE]; 126 unsigned int m_len; 127 int ret = 0; 128 EVP_MD_CTX tmp_ctx; 129 EVP_PKEY_CTX *pkctx = NULL; 130 131 EVP_MD_CTX_init(&tmp_ctx); 132 if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) || 133 !EVP_DigestFinal_ex(&tmp_ctx, m, &m_len)) { 134 EVP_MD_CTX_cleanup(&tmp_ctx); 135 goto out; 136 } 137 EVP_MD_CTX_cleanup(&tmp_ctx); 138 139 pkctx = EVP_PKEY_CTX_new(pkey, NULL); 140 if (!pkctx || 141 !EVP_PKEY_verify_init(pkctx) || 142 !EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest)) { 143 goto out; 144 } 145 ret = EVP_PKEY_verify(pkctx, sig, sig_len, m, m_len); 146 147 out: 148 EVP_PKEY_CTX_free(pkctx); 149 return ret; 150 } 151 152
