1 /* $OpenBSD: rsa_lib.c,v 1.26 2014/07/10 07:43:11 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 #include <openssl/crypto.h> 61 #include "cryptlib.h" 62 #include <openssl/lhash.h> 63 #include <openssl/bn.h> 64 #include <openssl/rsa.h> 65 #include <openssl/rand.h> 66 #ifndef OPENSSL_NO_ENGINE 67 #include <openssl/engine.h> 68 #endif 69 70 static const RSA_METHOD *default_RSA_meth = NULL; 71 72 RSA * 73 RSA_new(void) 74 { 75 RSA *r = RSA_new_method(NULL); 76 77 return r; 78 } 79 80 void 81 RSA_set_default_method(const RSA_METHOD *meth) 82 { 83 default_RSA_meth = meth; 84 } 85 86 const RSA_METHOD * 87 RSA_get_default_method(void) 88 { 89 if (default_RSA_meth == NULL) 90 default_RSA_meth = RSA_PKCS1_SSLeay(); 91 92 return default_RSA_meth; 93 } 94 95 const RSA_METHOD * 96 RSA_get_method(const RSA *rsa) 97 { 98 return rsa->meth; 99 } 100 101 int 102 RSA_set_method(RSA *rsa, const RSA_METHOD *meth) 103 { 104 /* 105 * NB: The caller is specifically setting a method, so it's not up to us 106 * to deal with which ENGINE it comes from. 107 */ 108 const RSA_METHOD *mtmp; 109 110 mtmp = rsa->meth; 111 if (mtmp->finish) 112 mtmp->finish(rsa); 113 #ifndef OPENSSL_NO_ENGINE 114 if (rsa->engine) { 115 ENGINE_finish(rsa->engine); 116 rsa->engine = NULL; 117 } 118 #endif 119 rsa->meth = meth; 120 if (meth->init) 121 meth->init(rsa); 122 return 1; 123 } 124 125 RSA * 126 RSA_new_method(ENGINE *engine) 127 { 128 RSA *ret; 129 130 ret = malloc(sizeof(RSA)); 131 if (ret == NULL) { 132 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE); 133 return NULL; 134 } 135 136 ret->meth = RSA_get_default_method(); 137 #ifndef OPENSSL_NO_ENGINE 138 if (engine) { 139 if (!ENGINE_init(engine)) { 140 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); 141 free(ret); 142 return NULL; 143 } 144 ret->engine = engine; 145 } else 146 ret->engine = ENGINE_get_default_RSA(); 147 if (ret->engine) { 148 ret->meth = ENGINE_get_RSA(ret->engine); 149 if (!ret->meth) { 150 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); 151 ENGINE_finish(ret->engine); 152 free(ret); 153 return NULL; 154 } 155 } 156 #endif 157 158 ret->pad = 0; 159 ret->version = 0; 160 ret->n = NULL; 161 ret->e = NULL; 162 ret->d = NULL; 163 ret->p = NULL; 164 ret->q = NULL; 165 ret->dmp1 = NULL; 166 ret->dmq1 = NULL; 167 ret->iqmp = NULL; 168 ret->references = 1; 169 ret->_method_mod_n = NULL; 170 ret->_method_mod_p = NULL; 171 ret->_method_mod_q = NULL; 172 ret->blinding = NULL; 173 ret->mt_blinding = NULL; 174 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; 175 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) { 176 #ifndef OPENSSL_NO_ENGINE 177 if (ret->engine) 178 ENGINE_finish(ret->engine); 179 #endif 180 free(ret); 181 return NULL; 182 } 183 184 if (ret->meth->init != NULL && !ret->meth->init(ret)) { 185 #ifndef OPENSSL_NO_ENGINE 186 if (ret->engine) 187 ENGINE_finish(ret->engine); 188 #endif 189 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); 190 free(ret); 191 ret = NULL; 192 } 193 return ret; 194 } 195 196 void 197 RSA_free(RSA *r) 198 { 199 int i; 200 201 if (r == NULL) 202 return; 203 204 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA); 205 if (i > 0) 206 return; 207 208 if (r->meth->finish) 209 r->meth->finish(r); 210 #ifndef OPENSSL_NO_ENGINE 211 if (r->engine) 212 ENGINE_finish(r->engine); 213 #endif 214 215 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); 216 217 BN_clear_free(r->n); 218 BN_clear_free(r->e); 219 BN_clear_free(r->d); 220 BN_clear_free(r->p); 221 BN_clear_free(r->q); 222 BN_clear_free(r->dmp1); 223 BN_clear_free(r->dmq1); 224 BN_clear_free(r->iqmp); 225 BN_BLINDING_free(r->blinding); 226 BN_BLINDING_free(r->mt_blinding); 227 free(r); 228 } 229 230 int 231 RSA_up_ref(RSA *r) 232 { 233 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); 234 return i > 1 ? 1 : 0; 235 } 236 237 int 238 RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 239 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 240 { 241 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, 242 new_func, dup_func, free_func); 243 } 244 245 int 246 RSA_set_ex_data(RSA *r, int idx, void *arg) 247 { 248 return CRYPTO_set_ex_data(&r->ex_data, idx, arg); 249 } 250 251 void * 252 RSA_get_ex_data(const RSA *r, int idx) 253 { 254 return CRYPTO_get_ex_data(&r->ex_data, idx); 255 } 256