| OLD | NEW |
|---|
| (Empty) |
| 1 /* fips_dsa_sign.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 3 * project 2007. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 2007 The OpenSSL Project. All rights reserved. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * | |
| 15 * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 * notice, this list of conditions and the following disclaimer in | |
| 17 * the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * | |
| 20 * 3. All advertising materials mentioning features or use of this | |
| 21 * software must display the following acknowledgment: | |
| 22 * "This product includes software developed by the OpenSSL Project | |
| 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 24 * | |
| 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 26 * endorse or promote products derived from this software without | |
| 27 * prior written permission. For written permission, please contact | |
| 28 * licensing@OpenSSL.org. | |
| 29 * | |
| 30 * 5. Products derived from this software may not be called "OpenSSL" | |
| 31 * nor may "OpenSSL" appear in their names without prior written | |
| 32 * permission of the OpenSSL Project. | |
| 33 * | |
| 34 * 6. Redistributions of any form whatsoever must retain the following | |
| 35 * acknowledgment: | |
| 36 * "This product includes software developed by the OpenSSL Project | |
| 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 38 * | |
| 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 51 * ==================================================================== | |
| 52 * | |
| 53 * This product includes cryptographic software written by Eric Young | |
| 54 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@cryptsoft.com). | |
| 56 * | |
| 57 */ | |
| 58 | |
| 59 #include <string.h> | |
| 60 #include <openssl/evp.h> | |
| 61 #include <openssl/dsa.h> | |
| 62 #include <openssl/err.h> | |
| 63 #include <openssl/sha.h> | |
| 64 #include <openssl/bn.h> | |
| 65 | |
| 66 #ifdef OPENSSL_FIPS | |
| 67 | |
| 68 /* FIPS versions of DSA_sign() and DSA_verify(). | |
| 69 * These include a tiny ASN1 encoder/decoder to handle the specific | |
| 70 * case of a DSA signature. | |
| 71 */ | |
| 72 | |
| 73 #if 0 | |
| 74 int FIPS_dsa_size(DSA *r) | |
| 75 { | |
| 76 int ilen; | |
| 77 ilen = BN_num_bytes(r->q); | |
| 78 if (ilen > 20) | |
| 79 return -1; | |
| 80 /* If MSB set need padding byte */ | |
| 81 ilen ++; | |
| 82 /* Also need 2 bytes INTEGER header for r and s plus | |
| 83 * 2 bytes SEQUENCE header making 6 in total. | |
| 84 */ | |
| 85 return ilen * 2 + 6; | |
| 86 } | |
| 87 #endif | |
| 88 | |
| 89 /* Tiny ASN1 encoder for DSA_SIG structure. We can assume r, s smaller than | |
| 90 * 0x80 octets as by the DSA standards they will be less than 2^160 | |
| 91 */ | |
| 92 | |
| 93 int FIPS_dsa_sig_encode(unsigned char *out, DSA_SIG *sig) | |
| 94 { | |
| 95 int rlen, slen, rpad, spad, seqlen; | |
| 96 rlen = BN_num_bytes(sig->r); | |
| 97 if (rlen > 20) | |
| 98 return -1; | |
| 99 if (BN_num_bits(sig->r) & 0x7) | |
| 100 rpad = 0; | |
| 101 else | |
| 102 rpad = 1; | |
| 103 slen = BN_num_bytes(sig->s); | |
| 104 if (slen > 20) | |
| 105 return -1; | |
| 106 if (BN_num_bits(sig->s) & 0x7) | |
| 107 spad = 0; | |
| 108 else | |
| 109 spad = 1; | |
| 110 /* Length of SEQUENCE, (1 tag + 1 len octet) * 2 + content octets */ | |
| 111 seqlen = rlen + rpad + slen + spad + 4; | |
| 112 /* Actual encoded length: include SEQUENCE header */ | |
| 113 if (!out) | |
| 114 return seqlen + 2; | |
| 115 | |
| 116 /* Output SEQUENCE header */ | |
| 117 *out++ = V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED; | |
| 118 *out++ = (unsigned char)seqlen; | |
| 119 | |
| 120 /* Output r */ | |
| 121 *out++ = V_ASN1_INTEGER; | |
| 122 *out++ = (unsigned char)(rlen + rpad); | |
| 123 if (rpad) | |
| 124 *out++ = 0; | |
| 125 BN_bn2bin(sig->r, out); | |
| 126 out += rlen; | |
| 127 | |
| 128 /* Output s */ | |
| 129 *out++ = V_ASN1_INTEGER; | |
| 130 *out++ = (unsigned char)(slen + spad); | |
| 131 if (spad) | |
| 132 *out++ = 0; | |
| 133 BN_bn2bin(sig->s, out); | |
| 134 return seqlen + 2; | |
| 135 } | |
| 136 | |
| 137 /* Companion DSA_SIG decoder */ | |
| 138 | |
| 139 int FIPS_dsa_sig_decode(DSA_SIG *sig, const unsigned char *in, int inlen) | |
| 140 { | |
| 141 int seqlen, rlen, slen; | |
| 142 const unsigned char *rbin; | |
| 143 /* Sanity check */ | |
| 144 | |
| 145 /* Need SEQUENCE tag */ | |
| 146 if (*in++ != (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED)) | |
| 147 return 0; | |
| 148 /* Get length octet */ | |
| 149 seqlen = *in++; | |
| 150 /* Check sensible length value */ | |
| 151 if (seqlen < 4 || seqlen > 0x7F) | |
| 152 return 0; | |
| 153 /* Check INTEGER tag */ | |
| 154 if (*in++ != V_ASN1_INTEGER) | |
| 155 return 0; | |
| 156 rlen = *in++; | |
| 157 seqlen -= 2 + rlen; | |
| 158 /* Check sensible seqlen value */ | |
| 159 if (seqlen < 2) | |
| 160 return 0; | |
| 161 rbin = in; | |
| 162 in += rlen; | |
| 163 /* Check INTEGER tag */ | |
| 164 if (*in++ != V_ASN1_INTEGER) | |
| 165 return 0; | |
| 166 slen = *in++; | |
| 167 /* Remaining bytes of SEQUENCE should exactly match | |
| 168 * encoding of s | |
| 169 */ | |
| 170 if (seqlen != (slen + 2)) | |
| 171 return 0; | |
| 172 if (!sig->r && !(sig->r = BN_new())) | |
| 173 return 0; | |
| 174 if (!sig->s && !(sig->s = BN_new())) | |
| 175 return 0; | |
| 176 if (!BN_bin2bn(rbin, rlen, sig->r)) | |
| 177 return 0; | |
| 178 if (!BN_bin2bn(in, slen, sig->s)) | |
| 179 return 0; | |
| 180 return 1; | |
| 181 } | |
| 182 | |
| 183 static int fips_dsa_sign(int type, const unsigned char *x, int y, | |
| 184 unsigned char *sig, unsigned int *siglen, EVP_MD_SVCTX *sv) | |
| 185 { | |
| 186 DSA *dsa = sv->key; | |
| 187 unsigned char dig[EVP_MAX_MD_SIZE]; | |
| 188 unsigned int dlen; | |
| 189 DSA_SIG *s; | |
| 190 EVP_DigestFinal_ex(sv->mctx, dig, &dlen); | |
| 191 s=dsa->meth->dsa_do_sign(dig,dlen,dsa); | |
| 192 OPENSSL_cleanse(dig, dlen); | |
| 193 if (s == NULL) | |
| 194 { | |
| 195 *siglen=0; | |
| 196 return 0; | |
| 197 } | |
| 198 *siglen= FIPS_dsa_sig_encode(sig, s); | |
| 199 DSA_SIG_free(s); | |
| 200 if (*siglen < 0) | |
| 201 return 0; | |
| 202 return 1; | |
| 203 } | |
| 204 | |
| 205 static int fips_dsa_verify(int type, const unsigned char *x, int y, | |
| 206 const unsigned char *sigbuf, unsigned int siglen, EVP_MD_SVCTX *sv) | |
| 207 { | |
| 208 DSA *dsa = sv->key; | |
| 209 DSA_SIG *s; | |
| 210 int ret=-1; | |
| 211 unsigned char dig[EVP_MAX_MD_SIZE]; | |
| 212 unsigned int dlen; | |
| 213 | |
| 214 s = DSA_SIG_new(); | |
| 215 if (s == NULL) | |
| 216 return ret; | |
| 217 if (!FIPS_dsa_sig_decode(s,sigbuf,siglen)) | |
| 218 goto err; | |
| 219 EVP_DigestFinal_ex(sv->mctx, dig, &dlen); | |
| 220 ret=dsa->meth->dsa_do_verify(dig,dlen,s,dsa); | |
| 221 OPENSSL_cleanse(dig, dlen); | |
| 222 err: | |
| 223 DSA_SIG_free(s); | |
| 224 return ret; | |
| 225 } | |
| 226 | |
| 227 static int init(EVP_MD_CTX *ctx) | |
| 228 { return SHA1_Init(ctx->md_data); } | |
| 229 | |
| 230 static int update(EVP_MD_CTX *ctx,const void *data,size_t count) | |
| 231 { return SHA1_Update(ctx->md_data,data,count); } | |
| 232 | |
| 233 static int final(EVP_MD_CTX *ctx,unsigned char *md) | |
| 234 { return SHA1_Final(md,ctx->md_data); } | |
| 235 | |
| 236 static const EVP_MD dss1_md= | |
| 237 { | |
| 238 NID_dsa, | |
| 239 NID_dsaWithSHA1, | |
| 240 SHA_DIGEST_LENGTH, | |
| 241 EVP_MD_FLAG_FIPS|EVP_MD_FLAG_SVCTX, | |
| 242 init, | |
| 243 update, | |
| 244 final, | |
| 245 NULL, | |
| 246 NULL, | |
| 247 (evp_sign_method *)fips_dsa_sign, | |
| 248 (evp_verify_method *)fips_dsa_verify, | |
| 249 {EVP_PKEY_DSA,EVP_PKEY_DSA2,EVP_PKEY_DSA3, EVP_PKEY_DSA4,0}, | |
| 250 SHA_CBLOCK, | |
| 251 sizeof(EVP_MD *)+sizeof(SHA_CTX), | |
| 252 }; | |
| 253 | |
| 254 const EVP_MD *EVP_dss1(void) | |
| 255 { | |
| 256 return(&dss1_md); | |
| 257 } | |
| 258 #endif | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 9254031:
Upgrade chrome's OpenSSL to same version Android ships with. (Closed)
Base URL: http://src.chromium.org/svn/trunk/deps/third_party/openssl/