1 /* $OpenBSD: rsa_lib.c,v 1.43 2022/06/27 12:30:28 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 "evp_locl.h" 71 #include "rsa_locl.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 87 void 88 RSA_set_default_method(const RSA_METHOD *meth) 89 { 90 default_RSA_meth = meth; 91 } 92 93 const RSA_METHOD * 94 RSA_get_default_method(void) 95 { 96 if (default_RSA_meth == NULL) 97 default_RSA_meth = RSA_PKCS1_SSLeay(); 98 99 return default_RSA_meth; 100 } 101 102 const RSA_METHOD * 103 RSA_get_method(const RSA *rsa) 104 { 105 return rsa->meth; 106 } 107 108 int 109 RSA_set_method(RSA *rsa, const RSA_METHOD *meth) 110 { 111 /* 112 * NB: The caller is specifically setting a method, so it's not up to us 113 * to deal with which ENGINE it comes from. 114 */ 115 const RSA_METHOD *mtmp; 116 117 mtmp = rsa->meth; 118 if (mtmp->finish) 119 mtmp->finish(rsa); 120 #ifndef OPENSSL_NO_ENGINE 121 ENGINE_finish(rsa->engine); 122 rsa->engine = NULL; 123 #endif 124 rsa->meth = meth; 125 if (meth->init) 126 meth->init(rsa); 127 return 1; 128 } 129 130 RSA * 131 RSA_new_method(ENGINE *engine) 132 { 133 RSA *ret; 134 135 if ((ret = calloc(1, sizeof(RSA))) == NULL) { 136 RSAerror(ERR_R_MALLOC_FAILURE); 137 return NULL; 138 } 139 140 ret->meth = RSA_get_default_method(); 141 142 #ifndef OPENSSL_NO_ENGINE 143 if (engine != NULL) { 144 if (!ENGINE_init(engine)) { 145 RSAerror(ERR_R_ENGINE_LIB); 146 goto err; 147 } 148 ret->engine = engine; 149 } else { 150 ret->engine = ENGINE_get_default_RSA(); 151 } 152 153 if (ret->engine != NULL) { 154 if ((ret->meth = ENGINE_get_RSA(ret->engine)) == NULL) { 155 RSAerror(ERR_R_ENGINE_LIB); 156 goto err; 157 } 158 } 159 #endif 160 161 ret->references = 1; 162 ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW; 163 164 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) 165 goto err; 166 167 if (ret->meth->init != NULL && !ret->meth->init(ret)) { 168 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data); 169 goto err; 170 } 171 172 return ret; 173 174 err: 175 #ifndef OPENSSL_NO_ENGINE 176 ENGINE_finish(ret->engine); 177 #endif 178 free(ret); 179 180 return NULL; 181 } 182 183 void 184 RSA_free(RSA *r) 185 { 186 int i; 187 188 if (r == NULL) 189 return; 190 191 i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA); 192 if (i > 0) 193 return; 194 195 if (r->meth->finish) 196 r->meth->finish(r); 197 #ifndef OPENSSL_NO_ENGINE 198 ENGINE_finish(r->engine); 199 #endif 200 201 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data); 202 203 BN_clear_free(r->n); 204 BN_clear_free(r->e); 205 BN_clear_free(r->d); 206 BN_clear_free(r->p); 207 BN_clear_free(r->q); 208 BN_clear_free(r->dmp1); 209 BN_clear_free(r->dmq1); 210 BN_clear_free(r->iqmp); 211 BN_BLINDING_free(r->blinding); 212 BN_BLINDING_free(r->mt_blinding); 213 RSA_PSS_PARAMS_free(r->pss); 214 free(r); 215 } 216 217 int 218 RSA_up_ref(RSA *r) 219 { 220 int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA); 221 return i > 1 ? 1 : 0; 222 } 223 224 int 225 RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 226 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 227 { 228 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp, 229 new_func, dup_func, free_func); 230 } 231 232 int 233 RSA_set_ex_data(RSA *r, int idx, void *arg) 234 { 235 return CRYPTO_set_ex_data(&r->ex_data, idx, arg); 236 } 237 238 void * 239 RSA_get_ex_data(const RSA *r, int idx) 240 { 241 return CRYPTO_get_ex_data(&r->ex_data, idx); 242 } 243 244 int 245 RSA_security_bits(const RSA *rsa) 246 { 247 return BN_security_bits(RSA_bits(rsa), -1); 248 } 249 250 void 251 RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d) 252 { 253 if (n != NULL) 254 *n = r->n; 255 if (e != NULL) 256 *e = r->e; 257 if (d != NULL) 258 *d = r->d; 259 } 260 261 int 262 RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) 263 { 264 if ((r->n == NULL && n == NULL) || (r->e == NULL && e == NULL)) 265 return 0; 266 267 if (n != NULL) { 268 BN_free(r->n); 269 r->n = n; 270 } 271 if (e != NULL) { 272 BN_free(r->e); 273 r->e = e; 274 } 275 if (d != NULL) { 276 BN_free(r->d); 277 r->d = d; 278 } 279 280 return 1; 281 } 282 283 void 284 RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1, 285 const BIGNUM **iqmp) 286 { 287 if (dmp1 != NULL) 288 *dmp1 = r->dmp1; 289 if (dmq1 != NULL) 290 *dmq1 = r->dmq1; 291 if (iqmp != NULL) 292 *iqmp = r->iqmp; 293 } 294 295 int 296 RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp) 297 { 298 if ((r->dmp1 == NULL && dmp1 == NULL) || 299 (r->dmq1 == NULL && dmq1 == NULL) || 300 (r->iqmp == NULL && iqmp == NULL)) 301 return 0; 302 303 if (dmp1 != NULL) { 304 BN_free(r->dmp1); 305 r->dmp1 = dmp1; 306 } 307 if (dmq1 != NULL) { 308 BN_free(r->dmq1); 309 r->dmq1 = dmq1; 310 } 311 if (iqmp != NULL) { 312 BN_free(r->iqmp); 313 r->iqmp = iqmp; 314 } 315 316 return 1; 317 } 318 319 void 320 RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q) 321 { 322 if (p != NULL) 323 *p = r->p; 324 if (q != NULL) 325 *q = r->q; 326 } 327 328 int 329 RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q) 330 { 331 if ((r->p == NULL && p == NULL) || (r->q == NULL && q == NULL)) 332 return 0; 333 334 if (p != NULL) { 335 BN_free(r->p); 336 r->p = p; 337 } 338 if (q != NULL) { 339 BN_free(r->q); 340 r->q = q; 341 } 342 343 return 1; 344 } 345 346 const BIGNUM * 347 RSA_get0_n(const RSA *r) 348 { 349 return r->n; 350 } 351 352 const BIGNUM * 353 RSA_get0_e(const RSA *r) 354 { 355 return r->e; 356 } 357 358 const BIGNUM * 359 RSA_get0_d(const RSA *r) 360 { 361 return r->d; 362 } 363 364 const BIGNUM * 365 RSA_get0_p(const RSA *r) 366 { 367 return r->p; 368 } 369 370 const BIGNUM * 371 RSA_get0_q(const RSA *r) 372 { 373 return r->q; 374 } 375 376 const BIGNUM * 377 RSA_get0_dmp1(const RSA *r) 378 { 379 return r->dmp1; 380 } 381 382 const BIGNUM * 383 RSA_get0_dmq1(const RSA *r) 384 { 385 return r->dmq1; 386 } 387 388 const BIGNUM * 389 RSA_get0_iqmp(const RSA *r) 390 { 391 return r->iqmp; 392 } 393 394 const RSA_PSS_PARAMS * 395 RSA_get0_pss_params(const RSA *r) 396 { 397 return r->pss; 398 } 399 400 void 401 RSA_clear_flags(RSA *r, int flags) 402 { 403 r->flags &= ~flags; 404 } 405 406 int 407 RSA_test_flags(const RSA *r, int flags) 408 { 409 return r->flags & flags; 410 } 411 412 void 413 RSA_set_flags(RSA *r, int flags) 414 { 415 r->flags |= flags; 416 } 417 418 int 419 RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2) 420 { 421 /* Return an error if the key type is not RSA or RSA-PSS. */ 422 if (ctx != NULL && ctx->pmeth != NULL && 423 ctx->pmeth->pkey_id != EVP_PKEY_RSA && 424 ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS) 425 return -1; 426 427 return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2); 428 } 429