Cryptlib/OpenSSL/crypto/rsa/rsa_lib.c

   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 #ifdef OPENSSL_FIPS
  94         if (FIPS_mode())
  95             return FIPS_rsa_pkcs1_ssleay();
  96         else
  97             return RSA_PKCS1_SSLeay();
  98 #else
  99 # ifdef RSA_NULL
 100         default_RSA_meth = RSA_null_method();
 101 # else
 102         default_RSA_meth = RSA_PKCS1_SSLeay();
 103 # endif
 104 #endif
 105     }
 106
 107     return default_RSA_meth;
 108 }
 109
 110 const RSA_METHOD *RSA_get_method(const RSA *rsa)
 111 {
 112     return rsa->meth;
 113 }
 114
 115 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
 116 {
 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      */
 121     const RSA_METHOD *mtmp;
 122     mtmp = rsa->meth;
 123     if (mtmp->finish)
 124         mtmp->finish(rsa);
 125 #ifndef OPENSSL_NO_ENGINE
 126     if (rsa->engine) {
 127         ENGINE_finish(rsa->engine);
 128         rsa->engine = NULL;
 129     }
 130 #endif
 131     rsa->meth = meth;
 132     if (meth->init)
 133         meth->init(rsa);
 134     return 1;
 135 }
 136
 137 RSA *RSA_new_method(ENGINE *engine)
 138 {
 139     RSA *ret;
 140
 141     ret = (RSA *)OPENSSL_malloc(sizeof(RSA));
 142     if (ret == NULL) {
 143         RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
 144         return NULL;
 145     }
 146     memset(ret,0,sizeof(RSA));
 147
 148     ret->meth = RSA_get_default_method();
 149 #ifndef OPENSSL_NO_ENGINE
 150     if (engine) {
 151         if (!ENGINE_init(engine)) {
 152             RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
 153             OPENSSL_free(ret);
 154             return NULL;
 155         }
 156         ret->engine = engine;
 157     } else
 158         ret->engine = ENGINE_get_default_RSA();
 159     if (ret->engine) {
 160         ret->meth = ENGINE_get_RSA(ret->engine);
 161         if (!ret->meth) {
 162             RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
 163             ENGINE_finish(ret->engine);
 164             OPENSSL_free(ret);
 165             return NULL;
 166         }
 167     }
 168 #endif
 169
 170     ret->pad = 0;
 171     ret->version = 0;
 172     ret->n = NULL;
 173     ret->e = NULL;
 174     ret->d = NULL;
 175     ret->p = NULL;
 176     ret->q = NULL;
 177     ret->dmp1 = NULL;
 178     ret->dmq1 = NULL;
 179     ret->iqmp = NULL;
 180     ret->references = 1;
 181     ret->_method_mod_n = NULL;
 182     ret->_method_mod_p = NULL;
 183     ret->_method_mod_q = NULL;
 184     ret->blinding = NULL;
 185     ret->mt_blinding = NULL;
 186     ret->bignum_data = NULL;
 187     ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
 188     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
 189 #ifndef OPENSSL_NO_ENGINE
 190         if (ret->engine)
 191             ENGINE_finish(ret->engine);
 192 #endif
 193         OPENSSL_free(ret);
 194         return (NULL);
 195     }
 196
 197     if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
 198 #ifndef OPENSSL_NO_ENGINE
 199         if (ret->engine)
 200             ENGINE_finish(ret->engine);
 201 #endif
 202         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
 203         OPENSSL_free(ret);
 204         ret = NULL;
 205     }
 206     return (ret);
 207 }
 208
 209 void RSA_free(RSA *r)
 210 {
 211     int i;
 212
 213     if (r == NULL)
 214         return;
 215
 216     i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA);
 217 #ifdef REF_PRINT
 218     REF_PRINT("RSA", r);
 219 #endif
 220     if (i > 0)
 221         return;
 222 #ifdef REF_CHECK
 223     if (i < 0) {
 224         fprintf(stderr, "RSA_free, bad reference count\n");
 225         abort();
 226     }
 227 #endif
 228
 229     if (r->meth->finish)
 230         r->meth->finish(r);
 231 #ifndef OPENSSL_NO_ENGINE
 232     if (r->engine)
 233         ENGINE_finish(r->engine);
 234 #endif
 235
 236     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
 237
 238     if (r->n != NULL)
 239         BN_clear_free(r->n);
 240     if (r->e != NULL)
 241         BN_clear_free(r->e);
 242     if (r->d != NULL)
 243         BN_clear_free(r->d);
 244     if (r->p != NULL)
 245         BN_clear_free(r->p);
 246     if (r->q != NULL)
 247         BN_clear_free(r->q);
 248     if (r->dmp1 != NULL)
 249         BN_clear_free(r->dmp1);
 250     if (r->dmq1 != NULL)
 251         BN_clear_free(r->dmq1);
 252     if (r->iqmp != NULL)
 253         BN_clear_free(r->iqmp);
 254     if (r->blinding != NULL)
 255         BN_BLINDING_free(r->blinding);
 256     if (r->mt_blinding != NULL)
 257         BN_BLINDING_free(r->mt_blinding);
 258     if (r->bignum_data != NULL)
 259         OPENSSL_free_locked(r->bignum_data);
 260     OPENSSL_free(r);
 261 }
 262
 263 int RSA_up_ref(RSA *r)
 264 {
 265     int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
 266 #ifdef REF_PRINT
 267     REF_PRINT("RSA", r);
 268 #endif
 269 #ifdef REF_CHECK
 270     if (i < 2) {
 271         fprintf(stderr, "RSA_up_ref, bad reference count\n");
 272         abort();
 273     }
 274 #endif
 275     return ((i > 1) ? 1 : 0);
 276 }
 277
 278 int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
 279                          CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
 280 {
 281     return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
 282                                    new_func, dup_func, free_func);
 283 }
 284
 285 int RSA_set_ex_data(RSA *r, int idx, void *arg)
 286 {
 287     return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
 288 }
 289
 290 void *RSA_get_ex_data(const RSA *r, int idx)
 291 {
 292     return (CRYPTO_get_ex_data(&r->ex_data, idx));
 293 }
 294
 295 int RSA_memory_lock(RSA *r)
 296 {
 297     int i, j, k, off;
 298     char *p;
 299     BIGNUM *bn, **t[6], *b;
 300     BN_ULONG *ul;
 301
 302     if (r->d == NULL)
 303         return (1);
 304     t[0] = &r->d;
 305     t[1] = &r->p;
 306     t[2] = &r->q;
 307     t[3] = &r->dmp1;
 308     t[4] = &r->dmq1;
 309     t[5] = &r->iqmp;
 310     k = sizeof(BIGNUM) * 6;
 311     off = k / sizeof(BN_ULONG) + 1;
 312     j = 1;
 313     for (i = 0; i < 6; i++)
 314         j += (*t[i])->top;
 315     if ((p = OPENSSL_malloc_locked((off + j) * sizeof(BN_ULONG))) == NULL) {
 316         RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
 317         return (0);
 318     }
 319     bn = (BIGNUM *)p;
 320     ul = (BN_ULONG *)&(p[off]);
 321     for (i = 0; i < 6; i++) {
 322         b = *(t[i]);
 323         *(t[i]) = &(bn[i]);
 324         memcpy((char *)&(bn[i]), (char *)b, sizeof(BIGNUM));
 325         bn[i].flags = BN_FLG_STATIC_DATA;
 326         bn[i].d = ul;
 327         memcpy((char *)ul, b->d, sizeof(BN_ULONG) * b->top);
 328         ul += b->top;
 329         BN_clear_free(b);
 330     }
 331
 332     /* I should fix this so it can still be done */
 333     r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
 334
 335     r->bignum_data = p;
 336     return (1);
 337 }