1 /* crypto/rsa/rsa_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 <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 #ifdef OPENSSL_FIPS 71 #include <openssl/fips.h> 72 #endif 73 74 const char RSA_version[]="RSA" OPENSSL_VERSION_PTEXT; 75 76 static const RSA_METHOD *default_RSA_meth=NULL; 77 78 RSA *RSA_new(void) 79 { 80 RSA *r=RSA_new_method(NULL); 81 82 return r; 83 } 84 85 void RSA_set_default_method(const RSA_METHOD *meth) 86 { 87 default_RSA_meth = meth; 88 } 89 90 const RSA_METHOD *RSA_get_default_method(void) 91 { 92 if (default_RSA_meth == NULL) 93 { 94 #ifdef OPENSSL_FIPS 95 if (FIPS_mode()) 96 return FIPS_rsa_pkcs1_ssleay(); 97 else 98 return RSA_PKCS1_SSLeay(); 99 #else 100 #ifdef RSA_NULL 101 default_RSA_meth=RSA_null_method(); 102 #else 103 default_RSA_meth=RSA_PKCS1_SSLeay(); 104 #endif 105 #endif 106 } 107 108 return default_RSA_meth; 109 } 110 111 const RSA_METHOD *RSA_get_method(const RSA *rsa) 112 { 113 return rsa->meth; 114 } 115 116 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth) 117 { 118 /* NB: The caller is specifically setting a method, so it's not up to us 119 * to deal with which ENGINE it comes from. */ 120 const RSA_METHOD *mtmp; 121 mtmp = rsa->meth; 122 if (mtmp->finish) mtmp->finish(rsa); 123 #ifndef OPENSSL_NO_ENGINE 124 if (rsa->engine) 125 { 126 ENGINE_finish(rsa->engine); 127 rsa->engine = NULL; 128 } 129 #endif 130 rsa->meth = meth; 131 if (meth->init) meth->init(rsa); 132 return 1; 133 } 134 135 RSA *RSA_new_method(ENGINE *engine) 136 { 137 RSA *ret; 138 139 ret=(RSA *)OPENSSL_malloc(sizeof(RSA)); 140 if (ret == NULL) 141 { 142 RSAerr(RSA_F_RSA_NEW_METHOD,ERR_R_MALLOC_FAILURE); 143 return NULL; 144 } 145 146 ret->meth = RSA_get_default_method(); 147 #ifndef OPENSSL_NO_ENGINE 148 if (engine) 149 { 150 if (!ENGINE_init(engine)) 151 { 152 RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB); 153 OPENSSL_free(ret); 154 return NULL; 155 } 156 ret->engine = engine; 157 } 158 else 159 ret->engine = ENGINE_get_default_RSA(); 160 if(ret->engine) 161 { 162 ret->meth = ENGINE_get_RSA(ret->engine); 163 if(!ret->meth) 164 { 165 RSAerr(RSA_F_RSA_NEW_METHOD, 166 ERR_R_ENGINE_LIB); 167 ENGINE_finish(ret->engine); 168 OPENSSL_free(ret); 169 return NULL; 170 } 171 } 172 #endif 173 174 ret->pad=0; 175 ret->version=0; 176 ret->n=NULL; 177 ret->e=NULL; 178 ret->d=NULL; 179 ret->p=NULL; 180 ret->q=NULL; 181 ret->dmp1=NULL; 182 ret->dmq1=NULL; 183 ret->iqmp=NULL; 184 ret->references=1; 185 ret->_method_mod_n=NULL; 186 ret->_method_mod_p=NULL; 187 ret->_method_mod_q=NULL; 188 ret->blinding=NULL; 189 ret->mt_blinding=NULL; 190 ret->bignum_data=NULL; 191 ret->flags=ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; 192 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) 193 { 194 #ifndef OPENSSL_NO_ENGINE 195 if (ret->engine) 196 ENGINE_finish(ret->engine); 197 #endif 198 OPENSSL_free(ret); 199 return(NULL); 200 } 201 202 if ((ret->meth->init != NULL) && !ret->meth->init(ret)) 203 { 204 #ifndef OPENSSL_NO_ENGINE 205 if (ret->engine) 206 ENGINE_finish(ret->engine); 207 #endif 208 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); 209 OPENSSL_free(ret); 210 ret=NULL; 211 } 212 return(ret); 213 } 214 215 void RSA_free(RSA *r) 216 { 217 int i; 218 219 if (r == NULL) return; 220 221 i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_RSA); 222 #ifdef REF_PRINT 223 REF_PRINT("RSA",r); 224 #endif 225 if (i > 0) return; 226 #ifdef REF_CHECK 227 if (i < 0) 228 { 229 fprintf(stderr,"RSA_free, bad reference count\n"); 230 abort(); 231 } 232 #endif 233 234 if (r->meth->finish) 235 r->meth->finish(r); 236 #ifndef OPENSSL_NO_ENGINE 237 if (r->engine) 238 ENGINE_finish(r->engine); 239 #endif 240 241 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); 242 243 if (r->n != NULL) BN_clear_free(r->n); 244 if (r->e != NULL) BN_clear_free(r->e); 245 if (r->d != NULL) BN_clear_free(r->d); 246 if (r->p != NULL) BN_clear_free(r->p); 247 if (r->q != NULL) BN_clear_free(r->q); 248 if (r->dmp1 != NULL) BN_clear_free(r->dmp1); 249 if (r->dmq1 != NULL) BN_clear_free(r->dmq1); 250 if (r->iqmp != NULL) BN_clear_free(r->iqmp); 251 if (r->blinding != NULL) BN_BLINDING_free(r->blinding); 252 if (r->mt_blinding != NULL) BN_BLINDING_free(r->mt_blinding); 253 if (r->bignum_data != NULL) OPENSSL_free_locked(r->bignum_data); 254 OPENSSL_free(r); 255 } 256 257 int RSA_up_ref(RSA *r) 258 { 259 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); 260 #ifdef REF_PRINT 261 REF_PRINT("RSA",r); 262 #endif 263 #ifdef REF_CHECK 264 if (i < 2) 265 { 266 fprintf(stderr, "RSA_up_ref, bad reference count\n"); 267 abort(); 268 } 269 #endif 270 return ((i > 1) ? 1 : 0); 271 } 272 273 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 274 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 275 { 276 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, 277 new_func, dup_func, free_func); 278 } 279 280 int RSA_set_ex_data(RSA *r, int idx, void *arg) 281 { 282 return(CRYPTO_set_ex_data(&r->ex_data,idx,arg)); 283 } 284 285 void *RSA_get_ex_data(const RSA *r, int idx) 286 { 287 return(CRYPTO_get_ex_data(&r->ex_data,idx)); 288 } 289 290 int RSA_memory_lock(RSA *r) 291 { 292 int i,j,k,off; 293 char *p; 294 BIGNUM *bn,**t[6],*b; 295 BN_ULONG *ul; 296 297 if (r->d == NULL) return(1); 298 t[0]= &r->d; 299 t[1]= &r->p; 300 t[2]= &r->q; 301 t[3]= &r->dmp1; 302 t[4]= &r->dmq1; 303 t[5]= &r->iqmp; 304 k=sizeof(BIGNUM)*6; 305 off=k/sizeof(BN_ULONG)+1; 306 j=1; 307 for (i=0; i<6; i++) 308 j+= (*t[i])->top; 309 if ((p=OPENSSL_malloc_locked((off+j)*sizeof(BN_ULONG))) == NULL) 310 { 311 RSAerr(RSA_F_RSA_MEMORY_LOCK,ERR_R_MALLOC_FAILURE); 312 return(0); 313 } 314 bn=(BIGNUM *)p; 315 ul=(BN_ULONG *)&(p[off]); 316 for (i=0; i<6; i++) 317 { 318 b= *(t[i]); 319 *(t[i])= &(bn[i]); 320 memcpy((char *)&(bn[i]),(char *)b,sizeof(BIGNUM)); 321 bn[i].flags=BN_FLG_STATIC_DATA; 322 bn[i].d=ul; 323 memcpy((char *)ul,b->d,sizeof(BN_ULONG)*b->top); 324 ul+=b->top; 325 BN_clear_free(b); 326 } 327 328 /* I should fix this so it can still be done */ 329 r->flags&= ~(RSA_FLAG_CACHE_PRIVATE|RSA_FLAG_CACHE_PUBLIC); 330 331 r->bignum_data=p; 332 return(1); 333 } 334