1 /* $OpenBSD: rsa_lib.c,v 1.29 2014/10/18 17:20:40 jsing Exp $ */ 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 61 #include <openssl/opensslconf.h> 62 63 #include <openssl/bn.h> 64 #include <openssl/crypto.h> 65 #include <openssl/lhash.h> 66 #include <openssl/rsa.h> 67 68 #ifndef OPENSSL_NO_ENGINE 69 #include <openssl/engine.h> 70 #endif 71 72 static const RSA_METHOD *default_RSA_meth = NULL; 73 74 RSA * 75 RSA_new(void) 76 { 77 RSA *r = RSA_new_method(NULL); 78 79 return r; 80 } 81 82 void 83 RSA_set_default_method(const RSA_METHOD *meth) 84 { 85 default_RSA_meth = meth; 86 } 87 88 const RSA_METHOD * 89 RSA_get_default_method(void) 90 { 91 if (default_RSA_meth == NULL) 92 default_RSA_meth = RSA_PKCS1_SSLeay(); 93 94 return default_RSA_meth; 95 } 96 97 const RSA_METHOD * 98 RSA_get_method(const RSA *rsa) 99 { 100 return rsa->meth; 101 } 102 103 int 104 RSA_set_method(RSA *rsa, const RSA_METHOD *meth) 105 { 106 /* 107 * NB: The caller is specifically setting a method, so it's not up to us 108 * to deal with which ENGINE it comes from. 109 */ 110 const RSA_METHOD *mtmp; 111 112 mtmp = rsa->meth; 113 if (mtmp->finish) 114 mtmp->finish(rsa); 115 #ifndef OPENSSL_NO_ENGINE 116 if (rsa->engine) { 117 ENGINE_finish(rsa->engine); 118 rsa->engine = NULL; 119 } 120 #endif 121 rsa->meth = meth; 122 if (meth->init) 123 meth->init(rsa); 124 return 1; 125 } 126 127 RSA * 128 RSA_new_method(ENGINE *engine) 129 { 130 RSA *ret; 131 132 ret = malloc(sizeof(RSA)); 133 if (ret == NULL) { 134 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); 135 return NULL; 136 } 137 138 ret->meth = RSA_get_default_method(); 139 #ifndef OPENSSL_NO_ENGINE 140 if (engine) { 141 if (!ENGINE_init(engine)) { 142 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); 143 free(ret); 144 return NULL; 145 } 146 ret->engine = engine; 147 } else 148 ret->engine = ENGINE_get_default_RSA(); 149 if (ret->engine) { 150 ret->meth = ENGINE_get_RSA(ret->engine); 151 if (!ret->meth) { 152 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); 153 ENGINE_finish(ret->engine); 154 free(ret); 155 return NULL; 156 } 157 } 158 #endif 159 160 ret->pad = 0; 161 ret->version = 0; 162 ret->n = NULL; 163 ret->e = NULL; 164 ret->d = NULL; 165 ret->p = NULL; 166 ret->q = NULL; 167 ret->dmp1 = NULL; 168 ret->dmq1 = NULL; 169 ret->iqmp = NULL; 170 ret->references = 1; 171 ret->_method_mod_n = NULL; 172 ret->_method_mod_p = NULL; 173 ret->_method_mod_q = NULL; 174 ret->blinding = NULL; 175 ret->mt_blinding = NULL; 176 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; 177 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) { 178 #ifndef OPENSSL_NO_ENGINE 179 if (ret->engine) 180 ENGINE_finish(ret->engine); 181 #endif 182 free(ret); 183 return NULL; 184 } 185 186 if (ret->meth->init != NULL && !ret->meth->init(ret)) { 187 #ifndef OPENSSL_NO_ENGINE 188 if (ret->engine) 189 ENGINE_finish(ret->engine); 190 #endif 191 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); 192 free(ret); 193 ret = NULL; 194 } 195 return ret; 196 } 197 198 void 199 RSA_free(RSA *r) 200 { 201 int i; 202 203 if (r == NULL) 204 return; 205 206 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA); 207 if (i > 0) 208 return; 209 210 if (r->meth->finish) 211 r->meth->finish(r); 212 #ifndef OPENSSL_NO_ENGINE 213 if (r->engine) 214 ENGINE_finish(r->engine); 215 #endif 216 217 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); 218 219 BN_clear_free(r->n); 220 BN_clear_free(r->e); 221 BN_clear_free(r->d); 222 BN_clear_free(r->p); 223 BN_clear_free(r->q); 224 BN_clear_free(r->dmp1); 225 BN_clear_free(r->dmq1); 226 BN_clear_free(r->iqmp); 227 BN_BLINDING_free(r->blinding); 228 BN_BLINDING_free(r->mt_blinding); 229 free(r); 230 } 231 232 int 233 RSA_up_ref(RSA *r) 234 { 235 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); 236 return i > 1 ? 1 : 0; 237 } 238 239 int 240 RSA_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_RSA, argl, argp, 244 new_func, dup_func, free_func); 245 } 246 247 int 248 RSA_set_ex_data(RSA *r, int idx, void *arg) 249 { 250 return CRYPTO_set_ex_data(&r->ex_data, idx, arg); 251 } 252 253 void * 254 RSA_get_ex_data(const RSA *r, int idx) 255 { 256 return CRYPTO_get_ex_data(&r->ex_data, idx); 257 } 258