1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@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@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@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@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 65int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { 66 return EVP_DigestInit_ex(ctx, type, impl); 67} 68 69int EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type) { 70 return EVP_DigestInit(ctx, type); 71} 72 73int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { 74 return EVP_DigestUpdate(ctx, data, len); 75} 76 77int 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/* TODO(fork): this used to be used only with SHA-family hashes. Now we've 95 * removed the flag completely. Why was it added for just those hashes? */ 96#if 0 97 if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) { 98#endif 99 100 pkctx = EVP_PKEY_CTX_new(pkey, NULL); 101 if (!pkctx || EVP_PKEY_sign_init(pkctx) <= 0 || 102 EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0 || 103 EVP_PKEY_sign(pkctx, sig, &sig_len, m, m_len) <= 0) { 104 goto out; 105 } 106 *out_sig_len = sig_len; 107 ret = 1; 108 109out: 110 if (pkctx) { 111 EVP_PKEY_CTX_free(pkctx); 112 } 113 114 return ret; 115} 116 117int EVP_VerifyInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) { 118 return EVP_DigestInit_ex(ctx, type, impl); 119} 120 121int EVP_VerifyInit(EVP_MD_CTX *ctx, const EVP_MD *type) { 122 return EVP_DigestInit(ctx, type); 123} 124 125int EVP_VerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) { 126 return EVP_DigestUpdate(ctx, data, len); 127} 128 129int EVP_VerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig, size_t sig_len, 130 EVP_PKEY *pkey) { 131 uint8_t m[EVP_MAX_MD_SIZE]; 132 unsigned int m_len; 133 int ret = 0; 134 EVP_MD_CTX tmp_ctx; 135 EVP_PKEY_CTX *pkctx = NULL; 136 137 EVP_MD_CTX_init(&tmp_ctx); 138 if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) || 139 !EVP_DigestFinal_ex(&tmp_ctx, m, &m_len)) { 140 EVP_MD_CTX_cleanup(&tmp_ctx); 141 goto out; 142 } 143 EVP_MD_CTX_cleanup(&tmp_ctx); 144 145/* TODO(fork): this used to be used only with SHA-family hashes. Now we've 146 * removed the flag completely. Why was it added for just those hashes? */ 147#if 0 148 if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) { 149#endif 150 pkctx = EVP_PKEY_CTX_new(pkey, NULL); 151 if (!pkctx || 152 EVP_PKEY_verify_init(pkctx) <= 0 || 153 EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0) { 154 goto out; 155 } 156 ret = EVP_PKEY_verify(pkctx, sig, sig_len, m, m_len); 157 158out: 159 EVP_PKEY_CTX_free(pkctx); 160 return ret; 161} 162 163