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| 1 /* crypto/dh/dh_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 #include <stdio.h> | |
| 60 #include "cryptlib.h" | |
| 61 #include <openssl/bn.h> | |
| 62 #include <openssl/dh.h> | |
| 63 #ifndef OPENSSL_NO_ENGINE | |
| 64 #include <openssl/engine.h> | |
| 65 #endif | |
| 66 | |
| 67 #ifdef OPENSSL_FIPS | |
| 68 #include <openssl/fips.h> | |
| 69 #endif | |
| 70 | |
| 71 const char DH_version[]="Diffie-Hellman" OPENSSL_VERSION_PTEXT; | |
| 72 | |
| 73 static const DH_METHOD *default_DH_method = NULL; | |
| 74 | |
| 75 void DH_set_default_method(const DH_METHOD *meth) | |
| 76 { | |
| 77 default_DH_method = meth; | |
| 78 } | |
| 79 | |
| 80 const DH_METHOD *DH_get_default_method(void) | |
| 81 { | |
| 82 if(!default_DH_method) | |
| 83 { | |
| 84 #ifdef OPENSSL_FIPS | |
| 85 if (FIPS_mode()) | |
| 86 return FIPS_dh_openssl(); | |
| 87 else | |
| 88 return DH_OpenSSL(); | |
| 89 #else | |
| 90 default_DH_method = DH_OpenSSL(); | |
| 91 #endif | |
| 92 } | |
| 93 return default_DH_method; | |
| 94 } | |
| 95 | |
| 96 int DH_set_method(DH *dh, const DH_METHOD *meth) | |
| 97 { | |
| 98 /* NB: The caller is specifically setting a method, so it's not up to us | |
| 99 * to deal with which ENGINE it comes from. */ | |
| 100 const DH_METHOD *mtmp; | |
| 101 mtmp = dh->meth; | |
| 102 if (mtmp->finish) mtmp->finish(dh); | |
| 103 #ifndef OPENSSL_NO_ENGINE | |
| 104 if (dh->engine) | |
| 105 { | |
| 106 ENGINE_finish(dh->engine); | |
| 107 dh->engine = NULL; | |
| 108 } | |
| 109 #endif | |
| 110 dh->meth = meth; | |
| 111 if (meth->init) meth->init(dh); | |
| 112 return 1; | |
| 113 } | |
| 114 | |
| 115 DH *DH_new(void) | |
| 116 { | |
| 117 return DH_new_method(NULL); | |
| 118 } | |
| 119 | |
| 120 DH *DH_new_method(ENGINE *engine) | |
| 121 { | |
| 122 DH *ret; | |
| 123 | |
| 124 ret=(DH *)OPENSSL_malloc(sizeof(DH)); | |
| 125 if (ret == NULL) | |
| 126 { | |
| 127 DHerr(DH_F_DH_NEW_METHOD,ERR_R_MALLOC_FAILURE); | |
| 128 return(NULL); | |
| 129 } | |
| 130 | |
| 131 ret->meth = DH_get_default_method(); | |
| 132 #ifndef OPENSSL_NO_ENGINE | |
| 133 if (engine) | |
| 134 { | |
| 135 if (!ENGINE_init(engine)) | |
| 136 { | |
| 137 DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); | |
| 138 OPENSSL_free(ret); | |
| 139 return NULL; | |
| 140 } | |
| 141 ret->engine = engine; | |
| 142 } | |
| 143 else | |
| 144 ret->engine = ENGINE_get_default_DH(); | |
| 145 if(ret->engine) | |
| 146 { | |
| 147 ret->meth = ENGINE_get_DH(ret->engine); | |
| 148 if(!ret->meth) | |
| 149 { | |
| 150 DHerr(DH_F_DH_NEW_METHOD,ERR_R_ENGINE_LIB); | |
| 151 ENGINE_finish(ret->engine); | |
| 152 OPENSSL_free(ret); | |
| 153 return NULL; | |
| 154 } | |
| 155 } | |
| 156 #endif | |
| 157 | |
| 158 ret->pad=0; | |
| 159 ret->version=0; | |
| 160 ret->p=NULL; | |
| 161 ret->g=NULL; | |
| 162 ret->length=0; | |
| 163 ret->pub_key=NULL; | |
| 164 ret->priv_key=NULL; | |
| 165 ret->q=NULL; | |
| 166 ret->j=NULL; | |
| 167 ret->seed = NULL; | |
| 168 ret->seedlen = 0; | |
| 169 ret->counter = NULL; | |
| 170 ret->method_mont_p=NULL; | |
| 171 ret->references = 1; | |
| 172 ret->flags=ret->meth->flags & ~DH_FLAG_NON_FIPS_ALLOW; | |
| 173 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); | |
| 174 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) | |
| 175 { | |
| 176 #ifndef OPENSSL_NO_ENGINE | |
| 177 if (ret->engine) | |
| 178 ENGINE_finish(ret->engine); | |
| 179 #endif | |
| 180 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); | |
| 181 OPENSSL_free(ret); | |
| 182 ret=NULL; | |
| 183 } | |
| 184 return(ret); | |
| 185 } | |
| 186 | |
| 187 void DH_free(DH *r) | |
| 188 { | |
| 189 int i; | |
| 190 if(r == NULL) return; | |
| 191 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); | |
| 192 #ifdef REF_PRINT | |
| 193 REF_PRINT("DH",r); | |
| 194 #endif | |
| 195 if (i > 0) return; | |
| 196 #ifdef REF_CHECK | |
| 197 if (i < 0) | |
| 198 { | |
| 199 fprintf(stderr,"DH_free, bad reference count\n"); | |
| 200 abort(); | |
| 201 } | |
| 202 #endif | |
| 203 | |
| 204 if (r->meth->finish) | |
| 205 r->meth->finish(r); | |
| 206 #ifndef OPENSSL_NO_ENGINE | |
| 207 if (r->engine) | |
| 208 ENGINE_finish(r->engine); | |
| 209 #endif | |
| 210 | |
| 211 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); | |
| 212 | |
| 213 if (r->p != NULL) BN_clear_free(r->p); | |
| 214 if (r->g != NULL) BN_clear_free(r->g); | |
| 215 if (r->q != NULL) BN_clear_free(r->q); | |
| 216 if (r->j != NULL) BN_clear_free(r->j); | |
| 217 if (r->seed) OPENSSL_free(r->seed); | |
| 218 if (r->counter != NULL) BN_clear_free(r->counter); | |
| 219 if (r->pub_key != NULL) BN_clear_free(r->pub_key); | |
| 220 if (r->priv_key != NULL) BN_clear_free(r->priv_key); | |
| 221 OPENSSL_free(r); | |
| 222 } | |
| 223 | |
| 224 int DH_up_ref(DH *r) | |
| 225 { | |
| 226 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH); | |
| 227 #ifdef REF_PRINT | |
| 228 REF_PRINT("DH",r); | |
| 229 #endif | |
| 230 #ifdef REF_CHECK | |
| 231 if (i < 2) | |
| 232 { | |
| 233 fprintf(stderr, "DH_up, bad reference count\n"); | |
| 234 abort(); | |
| 235 } | |
| 236 #endif | |
| 237 return ((i > 1) ? 1 : 0); | |
| 238 } | |
| 239 | |
| 240 int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, | |
| 241 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) | |
| 242 { | |
| 243 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, | |
| 244 new_func, dup_func, free_func); | |
| 245 } | |
| 246 | |
| 247 int DH_set_ex_data(DH *d, int idx, void *arg) | |
| 248 { | |
| 249 return(CRYPTO_set_ex_data(&d->ex_data,idx,arg)); | |
| 250 } | |
| 251 | |
| 252 void *DH_get_ex_data(DH *d, int idx) | |
| 253 { | |
| 254 return(CRYPTO_get_ex_data(&d->ex_data,idx)); | |
| 255 } | |
| 256 | |
| 257 int DH_size(const DH *dh) | |
| 258 { | |
| 259 return(BN_num_bytes(dh->p)); | |
| 260 } | |
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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