1 /* $OpenBSD: rsa_lib.c,v 1.48 2023/07/28 10:05:16 tb 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 "bn_local.h" 71 #include "evp_local.h" 72 #include "rsa_local.h" 73 74 #ifndef OPENSSL_NO_ENGINE 75 #include <openssl/engine.h> 76 #endif 77 78 static const RSA_METHOD *default_RSA_meth = NULL; 79 80 RSA * 81 RSA_new(void) 82 { 83 RSA *r = RSA_new_method(NULL); 84 85 return r; 86 } 87 LCRYPTO_ALIAS(RSA_new); 88 89 void 90 RSA_set_default_method(const RSA_METHOD *meth) 91 { 92 default_RSA_meth = meth; 93 } 94 LCRYPTO_ALIAS(RSA_set_default_method); 95 96 const RSA_METHOD * 97 RSA_get_default_method(void) 98 { 99 if (default_RSA_meth == NULL) 100 default_RSA_meth = RSA_PKCS1_SSLeay(); 101 102 return default_RSA_meth; 103 } 104 LCRYPTO_ALIAS(RSA_get_default_method); 105 106 const RSA_METHOD * 107 RSA_get_method(const RSA *rsa) 108 { 109 return rsa->meth; 110 } 111 LCRYPTO_ALIAS(RSA_get_method); 112 113 int 114 RSA_set_method(RSA *rsa, const RSA_METHOD *meth) 115 { 116 /* 117 * NB: The caller is specifically setting a method, so it's not up to us 118 * to deal with which ENGINE it comes from. 119 */ 120 const RSA_METHOD *mtmp; 121 122 mtmp = rsa->meth; 123 if (mtmp->finish) 124 mtmp->finish(rsa); 125 #ifndef OPENSSL_NO_ENGINE 126 ENGINE_finish(rsa->engine); 127 rsa->engine = NULL; 128 #endif 129 rsa->meth = meth; 130 if (meth->init) 131 meth->init(rsa); 132 return 1; 133 } 134 LCRYPTO_ALIAS(RSA_set_method); 135 136 RSA * 137 RSA_new_method(ENGINE *engine) 138 { 139 RSA *ret; 140 141 if ((ret = calloc(1, sizeof(RSA))) == NULL) { 142 RSAerror(ERR_R_MALLOC_FAILURE); 143 return NULL; 144 } 145 146 ret->meth = RSA_get_default_method(); 147 148 #ifndef OPENSSL_NO_ENGINE 149 if (engine != NULL) { 150 if (!ENGINE_init(engine)) { 151 RSAerror(ERR_R_ENGINE_LIB); 152 goto err; 153 } 154 ret->engine = engine; 155 } else { 156 ret->engine = ENGINE_get_default_RSA(); 157 } 158 159 if (ret->engine != NULL) { 160 if ((ret->meth = ENGINE_get_RSA(ret->engine)) == NULL) { 161 RSAerror(ERR_R_ENGINE_LIB); 162 goto err; 163 } 164 } 165 #endif 166 167 ret->references = 1; 168 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; 169 170 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) 171 goto err; 172 173 if (ret->meth->init != NULL && !ret->meth->init(ret)) { 174 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); 175 goto err; 176 } 177 178 return ret; 179 180 err: 181 #ifndef OPENSSL_NO_ENGINE 182 ENGINE_finish(ret->engine); 183 #endif 184 free(ret); 185 186 return NULL; 187 } 188 LCRYPTO_ALIAS(RSA_new_method); 189 190 void 191 RSA_free(RSA *r) 192 { 193 int i; 194 195 if (r == NULL) 196 return; 197 198 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA); 199 if (i > 0) 200 return; 201 202 if (r->meth->finish) 203 r->meth->finish(r); 204 #ifndef OPENSSL_NO_ENGINE 205 ENGINE_finish(r->engine); 206 #endif 207 208 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); 209 210 BN_free(r->n); 211 BN_free(r->e); 212 BN_free(r->d); 213 BN_free(r->p); 214 BN_free(r->q); 215 BN_free(r->dmp1); 216 BN_free(r->dmq1); 217 BN_free(r->iqmp); 218 BN_BLINDING_free(r->blinding); 219 BN_BLINDING_free(r->mt_blinding); 220 RSA_PSS_PARAMS_free(r->pss); 221 free(r); 222 } 223 LCRYPTO_ALIAS(RSA_free); 224 225 int 226 RSA_up_ref(RSA *r) 227 { 228 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); 229 return i > 1 ? 1 : 0; 230 } 231 LCRYPTO_ALIAS(RSA_up_ref); 232 233 int 234 RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 235 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 236 { 237 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, 238 new_func, dup_func, free_func); 239 } 240 LCRYPTO_ALIAS(RSA_get_ex_new_index); 241 242 int 243 RSA_set_ex_data(RSA *r, int idx, void *arg) 244 { 245 return CRYPTO_set_ex_data(&r->ex_data, idx, arg); 246 } 247 LCRYPTO_ALIAS(RSA_set_ex_data); 248 249 void * 250 RSA_get_ex_data(const RSA *r, int idx) 251 { 252 return CRYPTO_get_ex_data(&r->ex_data, idx); 253 } 254 LCRYPTO_ALIAS(RSA_get_ex_data); 255 256 int 257 RSA_security_bits(const RSA *rsa) 258 { 259 return BN_security_bits(RSA_bits(rsa), -1); 260 } 261 LCRYPTO_ALIAS(RSA_security_bits); 262 263 void 264 RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d) 265 { 266 if (n != NULL) 267 *n = r->n; 268 if (e != NULL) 269 *e = r->e; 270 if (d != NULL) 271 *d = r->d; 272 } 273 LCRYPTO_ALIAS(RSA_get0_key); 274 275 int 276 RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) 277 { 278 if ((r->n == NULL && n == NULL) || (r->e == NULL && e == NULL)) 279 return 0; 280 281 if (n != NULL) { 282 BN_free(r->n); 283 r->n = n; 284 } 285 if (e != NULL) { 286 BN_free(r->e); 287 r->e = e; 288 } 289 if (d != NULL) { 290 BN_free(r->d); 291 r->d = d; 292 } 293 294 return 1; 295 } 296 LCRYPTO_ALIAS(RSA_set0_key); 297 298 void 299 RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1, 300 const BIGNUM **iqmp) 301 { 302 if (dmp1 != NULL) 303 *dmp1 = r->dmp1; 304 if (dmq1 != NULL) 305 *dmq1 = r->dmq1; 306 if (iqmp != NULL) 307 *iqmp = r->iqmp; 308 } 309 LCRYPTO_ALIAS(RSA_get0_crt_params); 310 311 int 312 RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp) 313 { 314 if ((r->dmp1 == NULL && dmp1 == NULL) || 315 (r->dmq1 == NULL && dmq1 == NULL) || 316 (r->iqmp == NULL && iqmp == NULL)) 317 return 0; 318 319 if (dmp1 != NULL) { 320 BN_free(r->dmp1); 321 r->dmp1 = dmp1; 322 } 323 if (dmq1 != NULL) { 324 BN_free(r->dmq1); 325 r->dmq1 = dmq1; 326 } 327 if (iqmp != NULL) { 328 BN_free(r->iqmp); 329 r->iqmp = iqmp; 330 } 331 332 return 1; 333 } 334 LCRYPTO_ALIAS(RSA_set0_crt_params); 335 336 void 337 RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q) 338 { 339 if (p != NULL) 340 *p = r->p; 341 if (q != NULL) 342 *q = r->q; 343 } 344 LCRYPTO_ALIAS(RSA_get0_factors); 345 346 int 347 RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q) 348 { 349 if ((r->p == NULL && p == NULL) || (r->q == NULL && q == NULL)) 350 return 0; 351 352 if (p != NULL) { 353 BN_free(r->p); 354 r->p = p; 355 } 356 if (q != NULL) { 357 BN_free(r->q); 358 r->q = q; 359 } 360 361 return 1; 362 } 363 LCRYPTO_ALIAS(RSA_set0_factors); 364 365 const BIGNUM * 366 RSA_get0_n(const RSA *r) 367 { 368 return r->n; 369 } 370 LCRYPTO_ALIAS(RSA_get0_n); 371 372 const BIGNUM * 373 RSA_get0_e(const RSA *r) 374 { 375 return r->e; 376 } 377 LCRYPTO_ALIAS(RSA_get0_e); 378 379 const BIGNUM * 380 RSA_get0_d(const RSA *r) 381 { 382 return r->d; 383 } 384 LCRYPTO_ALIAS(RSA_get0_d); 385 386 const BIGNUM * 387 RSA_get0_p(const RSA *r) 388 { 389 return r->p; 390 } 391 LCRYPTO_ALIAS(RSA_get0_p); 392 393 const BIGNUM * 394 RSA_get0_q(const RSA *r) 395 { 396 return r->q; 397 } 398 LCRYPTO_ALIAS(RSA_get0_q); 399 400 const BIGNUM * 401 RSA_get0_dmp1(const RSA *r) 402 { 403 return r->dmp1; 404 } 405 LCRYPTO_ALIAS(RSA_get0_dmp1); 406 407 const BIGNUM * 408 RSA_get0_dmq1(const RSA *r) 409 { 410 return r->dmq1; 411 } 412 LCRYPTO_ALIAS(RSA_get0_dmq1); 413 414 const BIGNUM * 415 RSA_get0_iqmp(const RSA *r) 416 { 417 return r->iqmp; 418 } 419 LCRYPTO_ALIAS(RSA_get0_iqmp); 420 421 const RSA_PSS_PARAMS * 422 RSA_get0_pss_params(const RSA *r) 423 { 424 return r->pss; 425 } 426 LCRYPTO_ALIAS(RSA_get0_pss_params); 427 428 void 429 RSA_clear_flags(RSA *r, int flags) 430 { 431 r->flags &= ~flags; 432 } 433 LCRYPTO_ALIAS(RSA_clear_flags); 434 435 int 436 RSA_test_flags(const RSA *r, int flags) 437 { 438 return r->flags & flags; 439 } 440 LCRYPTO_ALIAS(RSA_test_flags); 441 442 void 443 RSA_set_flags(RSA *r, int flags) 444 { 445 r->flags |= flags; 446 } 447 LCRYPTO_ALIAS(RSA_set_flags); 448 449 int 450 RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2) 451 { 452 /* Return an error if the key type is not RSA or RSA-PSS. */ 453 if (ctx != NULL && ctx->pmeth != NULL && 454 ctx->pmeth->pkey_id != EVP_PKEY_RSA && 455 ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) 456 return -1; 457 458 return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2); 459 } 460 LCRYPTO_ALIAS(RSA_pkey_ctx_ctrl); 461