crypto/evp/m_sha1.c

   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
  58 #include <stdio.h>
  59 #include "internal/cryptlib.h"
  60
  61 #include <openssl/evp.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/sha.h>
  64 #ifndef OPENSSL_NO_RSA
  65 # include <openssl/rsa.h>
  66 #endif
  67 #include "internal/evp_int.h"
  68
  69 static int init(EVP_MD_CTX *ctx)
  70 {
  71     return SHA1_Init(EVP_MD_CTX_md_data(ctx));
  72 }
  73
  74 static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
  75 {
  76     return SHA1_Update(EVP_MD_CTX_md_data(ctx), data, count);
  77 }
  78
  79 static int final(EVP_MD_CTX *ctx, unsigned char *md)
  80 {
  81     return SHA1_Final(md, EVP_MD_CTX_md_data(ctx));
  82 }
  83
  84 static int ctrl(EVP_MD_CTX *ctx, int cmd, int mslen, void *ms)
  85 {
  86     unsigned char padtmp[40];
  87     unsigned char sha1tmp[SHA_DIGEST_LENGTH];
  88
  89     SHA_CTX *sha1 = EVP_MD_CTX_md_data(ctx);
  90
  91     if (cmd != EVP_CTRL_SSL3_MASTER_SECRET)
  92         return 0;
  93
  94     /* SSLv3 client auth handling: see RFC-6101 5.6.8 */
  95     if (mslen != 48)
  96         return 0;
  97
  98     /* At this point hash contains all handshake messages, update
  99      * with master secret and pad_1.
 100      */
 101
 102     if (SHA1_Update(sha1, ms, mslen) <= 0)
 103         return 0;
 104
 105     /* Set padtmp to pad_1 value */
 106     memset(padtmp, 0x36, sizeof(padtmp));
 107
 108     if (!SHA1_Update(sha1, padtmp, sizeof(padtmp)))
 109         return 0;
 110
 111     if (!SHA1_Final(sha1tmp, sha1))
 112         return 0;
 113
 114     /* Reinitialise context */
 115
 116     if (!SHA1_Init(sha1))
 117         return 0;
 118
 119     if (SHA1_Update(sha1, ms, mslen) <= 0)
 120         return 0;
 121
 122     /* Set padtmp to pad_2 value */
 123     memset(padtmp, 0x5c, sizeof(padtmp));
 124
 125     if (!SHA1_Update(sha1, padtmp, sizeof(padtmp)))
 126         return 0;
 127
 128     if (!SHA1_Update(sha1, sha1tmp, sizeof(sha1tmp)))
 129         return 0;
 130
 131     /* Now when ctx is finalised it will return the SSL v3 hash value */
 132     OPENSSL_cleanse(sha1tmp, sizeof(sha1tmp));
 133
 134     return 1;
 135
 136 }
 137
 138 static const EVP_MD sha1_md = {
 139     NID_sha1,
 140     NID_sha1WithRSAEncryption,
 141     SHA_DIGEST_LENGTH,
 142     EVP_MD_FLAG_DIGALGID_ABSENT,
 143     init,
 144     update,
 145     final,
 146     NULL,
 147     NULL,
 148     SHA_CBLOCK,
 149     sizeof(EVP_MD *) + sizeof(SHA_CTX),
 150     ctrl
 151 };
 152
 153 const EVP_MD *EVP_sha1(void)
 154 {
 155     return (&sha1_md);
 156 }
 157
 158 static int init224(EVP_MD_CTX *ctx)
 159 {
 160     return SHA224_Init(EVP_MD_CTX_md_data(ctx));
 161 }
 162
 163 static int init256(EVP_MD_CTX *ctx)
 164 {
 165     return SHA256_Init(EVP_MD_CTX_md_data(ctx));
 166 }
 167
 168 /*
 169  * Even though there're separate SHA224_[Update|Final], we call
 170  * SHA256 functions even in SHA224 context. This is what happens
 171  * there anyway, so we can spare few CPU cycles:-)
 172  */
 173 static int update256(EVP_MD_CTX *ctx, const void *data, size_t count)
 174 {
 175     return SHA256_Update(EVP_MD_CTX_md_data(ctx), data, count);
 176 }
 177
 178 static int final256(EVP_MD_CTX *ctx, unsigned char *md)
 179 {
 180     return SHA256_Final(md, EVP_MD_CTX_md_data(ctx));
 181 }
 182
 183 static const EVP_MD sha224_md = {
 184     NID_sha224,
 185     NID_sha224WithRSAEncryption,
 186     SHA224_DIGEST_LENGTH,
 187     EVP_MD_FLAG_DIGALGID_ABSENT,
 188     init224,
 189     update256,
 190     final256,
 191     NULL,
 192     NULL,
 193     SHA256_CBLOCK,
 194     sizeof(EVP_MD *) + sizeof(SHA256_CTX),
 195 };
 196
 197 const EVP_MD *EVP_sha224(void)
 198 {
 199     return (&sha224_md);
 200 }
 201
 202 static const EVP_MD sha256_md = {
 203     NID_sha256,
 204     NID_sha256WithRSAEncryption,
 205     SHA256_DIGEST_LENGTH,
 206     EVP_MD_FLAG_DIGALGID_ABSENT,
 207     init256,
 208     update256,
 209     final256,
 210     NULL,
 211     NULL,
 212     SHA256_CBLOCK,
 213     sizeof(EVP_MD *) + sizeof(SHA256_CTX),
 214 };
 215
 216 const EVP_MD *EVP_sha256(void)
 217 {
 218     return (&sha256_md);
 219 }
 220
 221 static int init384(EVP_MD_CTX *ctx)
 222 {
 223     return SHA384_Init(EVP_MD_CTX_md_data(ctx));
 224 }
 225
 226 static int init512(EVP_MD_CTX *ctx)
 227 {
 228     return SHA512_Init(EVP_MD_CTX_md_data(ctx));
 229 }
 230
 231 /* See comment in SHA224/256 section */
 232 static int update512(EVP_MD_CTX *ctx, const void *data, size_t count)
 233 {
 234     return SHA512_Update(EVP_MD_CTX_md_data(ctx), data, count);
 235 }
 236
 237 static int final512(EVP_MD_CTX *ctx, unsigned char *md)
 238 {
 239     return SHA512_Final(md, EVP_MD_CTX_md_data(ctx));
 240 }
 241
 242 static const EVP_MD sha384_md = {
 243     NID_sha384,
 244     NID_sha384WithRSAEncryption,
 245     SHA384_DIGEST_LENGTH,
 246     EVP_MD_FLAG_DIGALGID_ABSENT,
 247     init384,
 248     update512,
 249     final512,
 250     NULL,
 251     NULL,
 252     SHA512_CBLOCK,
 253     sizeof(EVP_MD *) + sizeof(SHA512_CTX),
 254 };
 255
 256 const EVP_MD *EVP_sha384(void)
 257 {
 258     return (&sha384_md);
 259 }
 260
 261 static const EVP_MD sha512_md = {
 262     NID_sha512,
 263     NID_sha512WithRSAEncryption,
 264     SHA512_DIGEST_LENGTH,
 265     EVP_MD_FLAG_DIGALGID_ABSENT,
 266     init512,
 267     update512,
 268     final512,
 269     NULL,
 270     NULL,
 271     SHA512_CBLOCK,
 272     sizeof(EVP_MD *) + sizeof(SHA512_CTX),
 273 };
 274
 275 const EVP_MD *EVP_sha512(void)
 276 {
 277     return (&sha512_md);
 278 }