1 /* $OpenBSD: rsa_lib.c,v 1.47 2023/07/08 12:26:45 beck 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/err.h> 66 #include <openssl/evp.h> 67 #include <openssl/lhash.h> 68 #include <openssl/rsa.h> 69 70 #include "evp_local.h" 71 #include "rsa_local.h" 72 73 #ifndef OPENSSL_NO_ENGINE 74 #include <openssl/engine.h> 75 #endif 76 77 static const RSA_METHOD *default_RSA_meth = NULL; 78 79 RSA * 80 RSA_new(void) 81 { 82 RSA *r = RSA_new_method(NULL); 83 84 return r; 85 } 86 LCRYPTO_ALIAS(RSA_new); 87 88 void 89 RSA_set_default_method(const RSA_METHOD *meth) 90 { 91 default_RSA_meth = meth; 92 } 93 LCRYPTO_ALIAS(RSA_set_default_method); 94 95 const RSA_METHOD * 96 RSA_get_default_method(void) 97 { 98 if (default_RSA_meth == NULL) 99 default_RSA_meth = RSA_PKCS1_SSLeay(); 100 101 return default_RSA_meth; 102 } 103 LCRYPTO_ALIAS(RSA_get_default_method); 104 105 const RSA_METHOD * 106 RSA_get_method(const RSA *rsa) 107 { 108 return rsa->meth; 109 } 110 LCRYPTO_ALIAS(RSA_get_method); 111 112 int 113 RSA_set_method(RSA *rsa, const RSA_METHOD *meth) 114 { 115 /* 116 * NB: The caller is specifically setting a method, so it's not up to us 117 * to deal with which ENGINE it comes from. 118 */ 119 const RSA_METHOD *mtmp; 120 121 mtmp = rsa->meth; 122 if (mtmp->finish) 123 mtmp->finish(rsa); 124 #ifndef OPENSSL_NO_ENGINE 125 ENGINE_finish(rsa->engine); 126 rsa->engine = NULL; 127 #endif 128 rsa->meth = meth; 129 if (meth->init) 130 meth->init(rsa); 131 return 1; 132 } 133 LCRYPTO_ALIAS(RSA_set_method); 134 135 RSA * 136 RSA_new_method(ENGINE *engine) 137 { 138 RSA *ret; 139 140 if ((ret = calloc(1, sizeof(RSA))) == NULL) { 141 RSAerror(ERR_R_MALLOC_FAILURE); 142 return NULL; 143 } 144 145 ret->meth = RSA_get_default_method(); 146 147 #ifndef OPENSSL_NO_ENGINE 148 if (engine != NULL) { 149 if (!ENGINE_init(engine)) { 150 RSAerror(ERR_R_ENGINE_LIB); 151 goto err; 152 } 153 ret->engine = engine; 154 } else { 155 ret->engine = ENGINE_get_default_RSA(); 156 } 157 158 if (ret->engine != NULL) { 159 if ((ret->meth = ENGINE_get_RSA(ret->engine)) == NULL) { 160 RSAerror(ERR_R_ENGINE_LIB); 161 goto err; 162 } 163 } 164 #endif 165 166 ret->references = 1; 167 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; 168 169 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) 170 goto err; 171 172 if (ret->meth->init != NULL && !ret->meth->init(ret)) { 173 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); 174 goto err; 175 } 176 177 return ret; 178 179 err: 180 #ifndef OPENSSL_NO_ENGINE 181 ENGINE_finish(ret->engine); 182 #endif 183 free(ret); 184 185 return NULL; 186 } 187 LCRYPTO_ALIAS(RSA_new_method); 188 189 void 190 RSA_free(RSA *r) 191 { 192 int i; 193 194 if (r == NULL) 195 return; 196 197 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA); 198 if (i > 0) 199 return; 200 201 if (r->meth->finish) 202 r->meth->finish(r); 203 #ifndef OPENSSL_NO_ENGINE 204 ENGINE_finish(r->engine); 205 #endif 206 207 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); 208 209 BN_free(r->n); 210 BN_free(r->e); 211 BN_free(r->d); 212 BN_free(r->p); 213 BN_free(r->q); 214 BN_free(r->dmp1); 215 BN_free(r->dmq1); 216 BN_free(r->iqmp); 217 BN_BLINDING_free(r->blinding); 218 BN_BLINDING_free(r->mt_blinding); 219 RSA_PSS_PARAMS_free(r->pss); 220 free(r); 221 } 222 LCRYPTO_ALIAS(RSA_free); 223 224 int 225 RSA_up_ref(RSA *r) 226 { 227 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); 228 return i > 1 ? 1 : 0; 229 } 230 LCRYPTO_ALIAS(RSA_up_ref); 231 232 int 233 RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 234 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 235 { 236 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, 237 new_func, dup_func, free_func); 238 } 239 LCRYPTO_ALIAS(RSA_get_ex_new_index); 240 241 int 242 RSA_set_ex_data(RSA *r, int idx, void *arg) 243 { 244 return CRYPTO_set_ex_data(&r->ex_data, idx, arg); 245 } 246 LCRYPTO_ALIAS(RSA_set_ex_data); 247 248 void * 249 RSA_get_ex_data(const RSA *r, int idx) 250 { 251 return CRYPTO_get_ex_data(&r->ex_data, idx); 252 } 253 LCRYPTO_ALIAS(RSA_get_ex_data); 254 255 int 256 RSA_security_bits(const RSA *rsa) 257 { 258 return BN_security_bits(RSA_bits(rsa), -1); 259 } 260 LCRYPTO_ALIAS(RSA_security_bits); 261 262 void 263 RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d) 264 { 265 if (n != NULL) 266 *n = r->n; 267 if (e != NULL) 268 *e = r->e; 269 if (d != NULL) 270 *d = r->d; 271 } 272 LCRYPTO_ALIAS(RSA_get0_key); 273 274 int 275 RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) 276 { 277 if ((r->n == NULL && n == NULL) || (r->e == NULL && e == NULL)) 278 return 0; 279 280 if (n != NULL) { 281 BN_free(r->n); 282 r->n = n; 283 } 284 if (e != NULL) { 285 BN_free(r->e); 286 r->e = e; 287 } 288 if (d != NULL) { 289 BN_free(r->d); 290 r->d = d; 291 } 292 293 return 1; 294 } 295 LCRYPTO_ALIAS(RSA_set0_key); 296 297 void 298 RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1, 299 const BIGNUM **iqmp) 300 { 301 if (dmp1 != NULL) 302 *dmp1 = r->dmp1; 303 if (dmq1 != NULL) 304 *dmq1 = r->dmq1; 305 if (iqmp != NULL) 306 *iqmp = r->iqmp; 307 } 308 LCRYPTO_ALIAS(RSA_get0_crt_params); 309 310 int 311 RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp) 312 { 313 if ((r->dmp1 == NULL && dmp1 == NULL) || 314 (r->dmq1 == NULL && dmq1 == NULL) || 315 (r->iqmp == NULL && iqmp == NULL)) 316 return 0; 317 318 if (dmp1 != NULL) { 319 BN_free(r->dmp1); 320 r->dmp1 = dmp1; 321 } 322 if (dmq1 != NULL) { 323 BN_free(r->dmq1); 324 r->dmq1 = dmq1; 325 } 326 if (iqmp != NULL) { 327 BN_free(r->iqmp); 328 r->iqmp = iqmp; 329 } 330 331 return 1; 332 } 333 LCRYPTO_ALIAS(RSA_set0_crt_params); 334 335 void 336 RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q) 337 { 338 if (p != NULL) 339 *p = r->p; 340 if (q != NULL) 341 *q = r->q; 342 } 343 LCRYPTO_ALIAS(RSA_get0_factors); 344 345 int 346 RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q) 347 { 348 if ((r->p == NULL && p == NULL) || (r->q == NULL && q == NULL)) 349 return 0; 350 351 if (p != NULL) { 352 BN_free(r->p); 353 r->p = p; 354 } 355 if (q != NULL) { 356 BN_free(r->q); 357 r->q = q; 358 } 359 360 return 1; 361 } 362 LCRYPTO_ALIAS(RSA_set0_factors); 363 364 const BIGNUM * 365 RSA_get0_n(const RSA *r) 366 { 367 return r->n; 368 } 369 LCRYPTO_ALIAS(RSA_get0_n); 370 371 const BIGNUM * 372 RSA_get0_e(const RSA *r) 373 { 374 return r->e; 375 } 376 LCRYPTO_ALIAS(RSA_get0_e); 377 378 const BIGNUM * 379 RSA_get0_d(const RSA *r) 380 { 381 return r->d; 382 } 383 LCRYPTO_ALIAS(RSA_get0_d); 384 385 const BIGNUM * 386 RSA_get0_p(const RSA *r) 387 { 388 return r->p; 389 } 390 LCRYPTO_ALIAS(RSA_get0_p); 391 392 const BIGNUM * 393 RSA_get0_q(const RSA *r) 394 { 395 return r->q; 396 } 397 LCRYPTO_ALIAS(RSA_get0_q); 398 399 const BIGNUM * 400 RSA_get0_dmp1(const RSA *r) 401 { 402 return r->dmp1; 403 } 404 LCRYPTO_ALIAS(RSA_get0_dmp1); 405 406 const BIGNUM * 407 RSA_get0_dmq1(const RSA *r) 408 { 409 return r->dmq1; 410 } 411 LCRYPTO_ALIAS(RSA_get0_dmq1); 412 413 const BIGNUM * 414 RSA_get0_iqmp(const RSA *r) 415 { 416 return r->iqmp; 417 } 418 LCRYPTO_ALIAS(RSA_get0_iqmp); 419 420 const RSA_PSS_PARAMS * 421 RSA_get0_pss_params(const RSA *r) 422 { 423 return r->pss; 424 } 425 LCRYPTO_ALIAS(RSA_get0_pss_params); 426 427 void 428 RSA_clear_flags(RSA *r, int flags) 429 { 430 r->flags &= ~flags; 431 } 432 LCRYPTO_ALIAS(RSA_clear_flags); 433 434 int 435 RSA_test_flags(const RSA *r, int flags) 436 { 437 return r->flags & flags; 438 } 439 LCRYPTO_ALIAS(RSA_test_flags); 440 441 void 442 RSA_set_flags(RSA *r, int flags) 443 { 444 r->flags |= flags; 445 } 446 LCRYPTO_ALIAS(RSA_set_flags); 447 448 int 449 RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2) 450 { 451 /* Return an error if the key type is not RSA or RSA-PSS. */ 452 if (ctx != NULL && ctx->pmeth != NULL && 453 ctx->pmeth->pkey_id != EVP_PKEY_RSA && 454 ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) 455 return -1; 456 457 return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2); 458 } 459 LCRYPTO_ALIAS(RSA_pkey_ctx_ctrl); 460