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| 1 /* crypto/dsa/dsa_lib.c */ | |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This package is an SSL implementation written | |
| 6 * by Eric Young (eay@cryptsoft.com). | |
| 7 * The implementation was written so as to conform with Netscapes SSL. | |
| 8 * | |
| 9 * This library is free for commercial and non-commercial use as long as | |
| 10 * the following conditions are aheared to. The following conditions | |
| 11 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 13 * included with this distribution is covered by the same copyright terms | |
| 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 15 * | |
| 16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 17 * the code are not to be removed. | |
| 18 * If this package is used in a product, Eric Young should be given attribution | |
| 19 * as the author of the parts of the library used. | |
| 20 * This can be in the form of a textual message at program startup or | |
| 21 * in documentation (online or textual) provided with the package. | |
| 22 * | |
| 23 * Redistribution and use in source and binary forms, with or without | |
| 24 * modification, are permitted provided that the following conditions | |
| 25 * are met: | |
| 26 * 1. Redistributions of source code must retain the copyright | |
| 27 * notice, this list of conditions and the following disclaimer. | |
| 28 * 2. Redistributions in binary form must reproduce the above copyright | |
| 29 * notice, this list of conditions and the following disclaimer in the | |
| 30 * documentation and/or other materials provided with the distribution. | |
| 31 * 3. All advertising materials mentioning features or use of this software | |
| 32 * must display the following acknowledgement: | |
| 33 * "This product includes cryptographic software written by | |
| 34 * Eric Young (eay@cryptsoft.com)" | |
| 35 * The word 'cryptographic' can be left out if the rouines from the library | |
| 36 * being used are not cryptographic related :-). | |
| 37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 38 * the apps directory (application code) you must include an acknowledgement: | |
| 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 40 * | |
| 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 51 * SUCH DAMAGE. | |
| 52 * | |
| 53 * The licence and distribution terms for any publically available version or | |
| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 55 * copied and put under another distribution licence | |
| 56 * [including the GNU Public Licence.] | |
| 57 */ | |
| 58 | |
| 59 /* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */ | |
| 60 | |
| 61 #include <stdio.h> | |
| 62 #include "cryptlib.h" | |
| 63 #include <openssl/bn.h> | |
| 64 #include <openssl/dsa.h> | |
| 65 #include <openssl/asn1.h> | |
| 66 #ifndef OPENSSL_NO_ENGINE | |
| 67 #include <openssl/engine.h> | |
| 68 #endif | |
| 69 #ifndef OPENSSL_NO_DH | |
| 70 #include <openssl/dh.h> | |
| 71 #endif | |
| 72 | |
| 73 #ifdef OPENSSL_FIPS | |
| 74 #include <openssl/fips.h> | |
| 75 #endif | |
| 76 | |
| 77 const char DSA_version[]="DSA" OPENSSL_VERSION_PTEXT; | |
| 78 | |
| 79 static const DSA_METHOD *default_DSA_method = NULL; | |
| 80 | |
| 81 void DSA_set_default_method(const DSA_METHOD *meth) | |
| 82 { | |
| 83 default_DSA_method = meth; | |
| 84 } | |
| 85 | |
| 86 const DSA_METHOD *DSA_get_default_method(void) | |
| 87 { | |
| 88 if(!default_DSA_method) | |
| 89 { | |
| 90 #ifdef OPENSSL_FIPS | |
| 91 if (FIPS_mode()) | |
| 92 return FIPS_dsa_openssl(); | |
| 93 else | |
| 94 return DSA_OpenSSL(); | |
| 95 #else | |
| 96 default_DSA_method = DSA_OpenSSL(); | |
| 97 #endif | |
| 98 } | |
| 99 return default_DSA_method; | |
| 100 } | |
| 101 | |
| 102 DSA *DSA_new(void) | |
| 103 { | |
| 104 return DSA_new_method(NULL); | |
| 105 } | |
| 106 | |
| 107 int DSA_set_method(DSA *dsa, const DSA_METHOD *meth) | |
| 108 { | |
| 109 /* NB: The caller is specifically setting a method, so it's not up to us | |
| 110 * to deal with which ENGINE it comes from. */ | |
| 111 const DSA_METHOD *mtmp; | |
| 112 mtmp = dsa->meth; | |
| 113 if (mtmp->finish) mtmp->finish(dsa); | |
| 114 #ifndef OPENSSL_NO_ENGINE | |
| 115 if (dsa->engine) | |
| 116 { | |
| 117 ENGINE_finish(dsa->engine); | |
| 118 dsa->engine = NULL; | |
| 119 } | |
| 120 #endif | |
| 121 dsa->meth = meth; | |
| 122 if (meth->init) meth->init(dsa); | |
| 123 return 1; | |
| 124 } | |
| 125 | |
| 126 DSA *DSA_new_method(ENGINE *engine) | |
| 127 { | |
| 128 DSA *ret; | |
| 129 | |
| 130 ret=(DSA *)OPENSSL_malloc(sizeof(DSA)); | |
| 131 if (ret == NULL) | |
| 132 { | |
| 133 DSAerr(DSA_F_DSA_NEW_METHOD,ERR_R_MALLOC_FAILURE); | |
| 134 return(NULL); | |
| 135 } | |
| 136 ret->meth = DSA_get_default_method(); | |
| 137 #ifndef OPENSSL_NO_ENGINE | |
| 138 if (engine) | |
| 139 { | |
| 140 if (!ENGINE_init(engine)) | |
| 141 { | |
| 142 DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB); | |
| 143 OPENSSL_free(ret); | |
| 144 return NULL; | |
| 145 } | |
| 146 ret->engine = engine; | |
| 147 } | |
| 148 else | |
| 149 ret->engine = ENGINE_get_default_DSA(); | |
| 150 if(ret->engine) | |
| 151 { | |
| 152 ret->meth = ENGINE_get_DSA(ret->engine); | |
| 153 if(!ret->meth) | |
| 154 { | |
| 155 DSAerr(DSA_F_DSA_NEW_METHOD, | |
| 156 ERR_R_ENGINE_LIB); | |
| 157 ENGINE_finish(ret->engine); | |
| 158 OPENSSL_free(ret); | |
| 159 return NULL; | |
| 160 } | |
| 161 } | |
| 162 #endif | |
| 163 | |
| 164 ret->pad=0; | |
| 165 ret->version=0; | |
| 166 ret->write_params=1; | |
| 167 ret->p=NULL; | |
| 168 ret->q=NULL; | |
| 169 ret->g=NULL; | |
| 170 | |
| 171 ret->pub_key=NULL; | |
| 172 ret->priv_key=NULL; | |
| 173 | |
| 174 ret->kinv=NULL; | |
| 175 ret->r=NULL; | |
| 176 ret->method_mont_p=NULL; | |
| 177 | |
| 178 ret->references=1; | |
| 179 ret->flags=ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW; | |
| 180 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data); | |
| 181 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) | |
| 182 { | |
| 183 #ifndef OPENSSL_NO_ENGINE | |
| 184 if (ret->engine) | |
| 185 ENGINE_finish(ret->engine); | |
| 186 #endif | |
| 187 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data); | |
| 188 OPENSSL_free(ret); | |
| 189 ret=NULL; | |
| 190 } | |
| 191 | |
| 192 return(ret); | |
| 193 } | |
| 194 | |
| 195 void DSA_free(DSA *r) | |
| 196 { | |
| 197 int i; | |
| 198 | |
| 199 if (r == NULL) return; | |
| 200 | |
| 201 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA); | |
| 202 #ifdef REF_PRINT | |
| 203 REF_PRINT("DSA",r); | |
| 204 #endif | |
| 205 if (i > 0) return; | |
| 206 #ifdef REF_CHECK | |
| 207 if (i < 0) | |
| 208 { | |
| 209 fprintf(stderr,"DSA_free, bad reference count\n"); | |
| 210 abort(); | |
| 211 } | |
| 212 #endif | |
| 213 | |
| 214 if(r->meth->finish) | |
| 215 r->meth->finish(r); | |
| 216 #ifndef OPENSSL_NO_ENGINE | |
| 217 if(r->engine) | |
| 218 ENGINE_finish(r->engine); | |
| 219 #endif | |
| 220 | |
| 221 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data); | |
| 222 | |
| 223 if (r->p != NULL) BN_clear_free(r->p); | |
| 224 if (r->q != NULL) BN_clear_free(r->q); | |
| 225 if (r->g != NULL) BN_clear_free(r->g); | |
| 226 if (r->pub_key != NULL) BN_clear_free(r->pub_key); | |
| 227 if (r->priv_key != NULL) BN_clear_free(r->priv_key); | |
| 228 if (r->kinv != NULL) BN_clear_free(r->kinv); | |
| 229 if (r->r != NULL) BN_clear_free(r->r); | |
| 230 OPENSSL_free(r); | |
| 231 } | |
| 232 | |
| 233 int DSA_up_ref(DSA *r) | |
| 234 { | |
| 235 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA); | |
| 236 #ifdef REF_PRINT | |
| 237 REF_PRINT("DSA",r); | |
| 238 #endif | |
| 239 #ifdef REF_CHECK | |
| 240 if (i < 2) | |
| 241 { | |
| 242 fprintf(stderr, "DSA_up_ref, bad reference count\n"); | |
| 243 abort(); | |
| 244 } | |
| 245 #endif | |
| 246 return ((i > 1) ? 1 : 0); | |
| 247 } | |
| 248 | |
| 249 int DSA_size(const DSA *r) | |
| 250 { | |
| 251 int ret,i; | |
| 252 ASN1_INTEGER bs; | |
| 253 unsigned char buf[4]; /* 4 bytes looks really small. | |
| 254 However, i2d_ASN1_INTEGER() will not look | |
| 255 beyond the first byte, as long as the second | |
| 256 parameter is NULL. */ | |
| 257 | |
| 258 i=BN_num_bits(r->q); | |
| 259 bs.length=(i+7)/8; | |
| 260 bs.data=buf; | |
| 261 bs.type=V_ASN1_INTEGER; | |
| 262 /* If the top bit is set the asn1 encoding is 1 larger. */ | |
| 263 buf[0]=0xff; | |
| 264 | |
| 265 i=i2d_ASN1_INTEGER(&bs,NULL); | |
| 266 i+=i; /* r and s */ | |
| 267 ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE); | |
| 268 return(ret); | |
| 269 } | |
| 270 | |
| 271 int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, | |
| 272 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) | |
| 273 { | |
| 274 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp, | |
| 275 new_func, dup_func, free_func); | |
| 276 } | |
| 277 | |
| 278 int DSA_set_ex_data(DSA *d, int idx, void *arg) | |
| 279 { | |
| 280 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg)); | |
| 281 } | |
| 282 | |
| 283 void *DSA_get_ex_data(DSA *d, int idx) | |
| 284 { | |
| 285 return(CRYPTO_get_ex_data(&d->ex_data,idx)); | |
| 286 } | |
| 287 | |
| 288 #ifndef OPENSSL_NO_DH | |
| 289 DH *DSA_dup_DH(const DSA *r) | |
| 290 { | |
| 291 /* DSA has p, q, g, optional pub_key, optional priv_key. | |
| 292 * DH has p, optional length, g, optional pub_key, optional priv_key, | |
| 293 * optional q. | |
| 294 */ | |
| 295 | |
| 296 DH *ret = NULL; | |
| 297 | |
| 298 if (r == NULL) | |
| 299 goto err; | |
| 300 ret = DH_new(); | |
| 301 if (ret == NULL) | |
| 302 goto err; | |
| 303 if (r->p != NULL) | |
| 304 if ((ret->p = BN_dup(r->p)) == NULL) | |
| 305 goto err; | |
| 306 if (r->q != NULL) | |
| 307 { | |
| 308 ret->length = BN_num_bits(r->q); | |
| 309 if ((ret->q = BN_dup(r->q)) == NULL) | |
| 310 goto err; | |
| 311 } | |
| 312 if (r->g != NULL) | |
| 313 if ((ret->g = BN_dup(r->g)) == NULL) | |
| 314 goto err; | |
| 315 if (r->pub_key != NULL) | |
| 316 if ((ret->pub_key = BN_dup(r->pub_key)) == NULL) | |
| 317 goto err; | |
| 318 if (r->priv_key != NULL) | |
| 319 if ((ret->priv_key = BN_dup(r->priv_key)) == NULL) | |
| 320 goto err; | |
| 321 | |
| 322 return ret; | |
| 323 | |
| 324 err: | |
| 325 if (ret != NULL) | |
| 326 DH_free(ret); | |
| 327 return NULL; | |
| 328 } | |
| 329 #endif | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master