1 /* crypto/evp/p_lib.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 "cryptlib.h" 61 #include <openssl/bn.h> 62 #include <openssl/err.h> 63 #include <openssl/objects.h> 64 #include <openssl/evp.h> 65 #include <openssl/asn1_mac.h> 66 #include <openssl/x509.h> 67 #ifndef OPENSSL_NO_RSA 68 #include <openssl/rsa.h> 69 #endif 70 #ifndef OPENSSL_NO_DSA 71 #include <openssl/dsa.h> 72 #endif 73 #ifndef OPENSSL_NO_DH 74 #include <openssl/dh.h> 75 #endif 76 77 #ifndef OPENSSL_NO_ENGINE 78 #include <openssl/engine.h> 79 #endif 80 81 #include "asn1_locl.h" 82 83 static void EVP_PKEY_free_it(EVP_PKEY *x); 84 85 int EVP_PKEY_bits(EVP_PKEY *pkey) 86 { 87 if (pkey && pkey->ameth && pkey->ameth->pkey_bits) 88 return pkey->ameth->pkey_bits(pkey); 89 return 0; 90 } 91 92 int EVP_PKEY_size(EVP_PKEY *pkey) 93 { 94 if (pkey && pkey->ameth && pkey->ameth->pkey_size) 95 return pkey->ameth->pkey_size(pkey); 96 return 0; 97 } 98 99 int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode) 100 { 101 #ifndef OPENSSL_NO_DSA 102 if (pkey->type == EVP_PKEY_DSA) 103 { 104 int ret=pkey->save_parameters; 105 106 if (mode >= 0) 107 pkey->save_parameters=mode; 108 return(ret); 109 } 110 #endif 111 #ifndef OPENSSL_NO_EC 112 if (pkey->type == EVP_PKEY_EC) 113 { 114 int ret = pkey->save_parameters; 115 116 if (mode >= 0) 117 pkey->save_parameters = mode; 118 return(ret); 119 } 120 #endif 121 return(0); 122 } 123 124 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) 125 { 126 if (to->type != from->type) 127 { 128 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES); 129 goto err; 130 } 131 132 if (EVP_PKEY_missing_parameters(from)) 133 { 134 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS); 135 goto err; 136 } 137 if (from->ameth && from->ameth->param_copy) 138 return from->ameth->param_copy(to, from); 139 err: 140 return 0; 141 } 142 143 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) 144 { 145 if (pkey->ameth && pkey->ameth->param_missing) 146 return pkey->ameth->param_missing(pkey); 147 return 0; 148 } 149 150 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) 151 { 152 if (a->type != b->type) 153 return -1; 154 if (a->ameth && a->ameth->param_cmp) 155 return a->ameth->param_cmp(a, b); 156 return -2; 157 } 158 159 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) 160 { 161 if (a->type != b->type) 162 return -1; 163 164 if (a->ameth) 165 { 166 int ret; 167 /* Compare parameters if the algorithm has them */ 168 if (a->ameth->param_cmp) 169 { 170 ret = a->ameth->param_cmp(a, b); 171 if (ret <= 0) 172 return ret; 173 } 174 175 if (a->ameth->pub_cmp) 176 return a->ameth->pub_cmp(a, b); 177 } 178 179 return -2; 180 } 181 182 EVP_PKEY *EVP_PKEY_new(void) 183 { 184 EVP_PKEY *ret; 185 186 ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY)); 187 if (ret == NULL) 188 { 189 EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE); 190 return(NULL); 191 } 192 ret->type=EVP_PKEY_NONE; 193 ret->save_type=EVP_PKEY_NONE; 194 ret->references=1; 195 ret->ameth=NULL; 196 ret->engine=NULL; 197 ret->pkey.ptr=NULL; 198 ret->attributes=NULL; 199 ret->save_parameters=1; 200 return(ret); 201 } 202 203 EVP_PKEY *EVP_PKEY_dup(EVP_PKEY *pkey) 204 { 205 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY); 206 return pkey; 207 } 208 209 /* Setup a public key ASN1 method and ENGINE from a NID or a string. 210 * If pkey is NULL just return 1 or 0 if the algorithm exists. 211 */ 212 213 static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len) 214 { 215 const EVP_PKEY_ASN1_METHOD *ameth; 216 ENGINE *e = NULL; 217 if (pkey) 218 { 219 if (pkey->pkey.ptr) 220 EVP_PKEY_free_it(pkey); 221 /* If key type matches and a method exists then this 222 * lookup has succeeded once so just indicate success. 223 */ 224 if ((type == pkey->save_type) && pkey->ameth) 225 return 1; 226 #ifndef OPENSSL_NO_ENGINE 227 /* If we have an ENGINE release it */ 228 if (pkey->engine) 229 { 230 ENGINE_finish(pkey->engine); 231 pkey->engine = NULL; 232 } 233 #endif 234 } 235 if (str) 236 ameth = EVP_PKEY_asn1_find_str(&e, str, len); 237 else 238 ameth = EVP_PKEY_asn1_find(&e, type); 239 #ifndef OPENSSL_NO_ENGINE 240 if (!pkey && e) 241 ENGINE_finish(e); 242 #endif 243 if (!ameth) 244 { 245 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM); 246 return 0; 247 } 248 if (pkey) 249 { 250 pkey->ameth = ameth; 251 pkey->engine = e; 252 253 pkey->type = pkey->ameth->pkey_id; 254 pkey->save_type=type; 255 } 256 return 1; 257 } 258 259 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) 260 { 261 return pkey_set_type(pkey, type, NULL, -1); 262 } 263 264 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len) 265 { 266 return pkey_set_type(pkey, EVP_PKEY_NONE, str, len); 267 } 268 269 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) 270 { 271 if (!EVP_PKEY_set_type(pkey, type)) 272 return 0; 273 pkey->pkey.ptr=key; 274 return (key != NULL); 275 } 276 277 void *EVP_PKEY_get0(EVP_PKEY *pkey) 278 { 279 return pkey->pkey.ptr; 280 } 281 282 #ifndef OPENSSL_NO_RSA 283 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) 284 { 285 int ret = EVP_PKEY_assign_RSA(pkey, key); 286 if(ret) 287 RSA_up_ref(key); 288 return ret; 289 } 290 291 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) 292 { 293 if(pkey->type != EVP_PKEY_RSA) { 294 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY); 295 return NULL; 296 } 297 RSA_up_ref(pkey->pkey.rsa); 298 return pkey->pkey.rsa; 299 } 300 #endif 301 302 #ifndef OPENSSL_NO_DSA 303 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) 304 { 305 int ret = EVP_PKEY_assign_DSA(pkey, key); 306 if(ret) 307 DSA_up_ref(key); 308 return ret; 309 } 310 311 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) 312 { 313 if(pkey->type != EVP_PKEY_DSA) { 314 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY); 315 return NULL; 316 } 317 DSA_up_ref(pkey->pkey.dsa); 318 return pkey->pkey.dsa; 319 } 320 #endif 321 322 #ifndef OPENSSL_NO_EC 323 324 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) 325 { 326 int ret = EVP_PKEY_assign_EC_KEY(pkey,key); 327 if (ret) 328 EC_KEY_up_ref(key); 329 return ret; 330 } 331 332 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) 333 { 334 if (pkey->type != EVP_PKEY_EC) 335 { 336 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY); 337 return NULL; 338 } 339 EC_KEY_up_ref(pkey->pkey.ec); 340 return pkey->pkey.ec; 341 } 342 #endif 343 344 345 #ifndef OPENSSL_NO_DH 346 347 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key) 348 { 349 int ret = EVP_PKEY_assign_DH(pkey, key); 350 if(ret) 351 DH_up_ref(key); 352 return ret; 353 } 354 355 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey) 356 { 357 if(pkey->type != EVP_PKEY_DH) { 358 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY); 359 return NULL; 360 } 361 DH_up_ref(pkey->pkey.dh); 362 return pkey->pkey.dh; 363 } 364 #endif 365 366 int EVP_PKEY_type(int type) 367 { 368 int ret; 369 const EVP_PKEY_ASN1_METHOD *ameth; 370 ENGINE *e; 371 ameth = EVP_PKEY_asn1_find(&e, type); 372 if (ameth) 373 ret = ameth->pkey_id; 374 else 375 ret = NID_undef; 376 #ifndef OPENSSL_NO_ENGINE 377 if (e) 378 ENGINE_finish(e); 379 #endif 380 return ret; 381 } 382 383 int EVP_PKEY_id(const EVP_PKEY *pkey) 384 { 385 return pkey->type; 386 } 387 388 int EVP_PKEY_base_id(const EVP_PKEY *pkey) 389 { 390 return EVP_PKEY_type(pkey->type); 391 } 392 393 void EVP_PKEY_free(EVP_PKEY *x) 394 { 395 int i; 396 397 if (x == NULL) return; 398 399 i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY); 400 #ifdef REF_PRINT 401 REF_PRINT("EVP_PKEY",x); 402 #endif 403 if (i > 0) return; 404 #ifdef REF_CHECK 405 if (i < 0) 406 { 407 fprintf(stderr,"EVP_PKEY_free, bad reference count\n"); 408 abort(); 409 } 410 #endif 411 EVP_PKEY_free_it(x); 412 if (x->attributes) 413 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free); 414 OPENSSL_free(x); 415 } 416 417 static void EVP_PKEY_free_it(EVP_PKEY *x) 418 { 419 if (x->ameth && x->ameth->pkey_free) 420 { 421 x->ameth->pkey_free(x); 422 x->pkey.ptr = NULL; 423 } 424 #ifndef OPENSSL_NO_ENGINE 425 if (x->engine) 426 { 427 ENGINE_finish(x->engine); 428 x->engine = NULL; 429 } 430 #endif 431 } 432 433 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent, 434 const char *kstr) 435 { 436 BIO_indent(out, indent, 128); 437 BIO_printf(out, "%s algorithm \"%s\" unsupported\n", 438 kstr, OBJ_nid2ln(pkey->type)); 439 return 1; 440 } 441 442 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey, 443 int indent, ASN1_PCTX *pctx) 444 { 445 if (pkey->ameth && pkey->ameth->pub_print) 446 return pkey->ameth->pub_print(out, pkey, indent, pctx); 447 448 return unsup_alg(out, pkey, indent, "Public Key"); 449 } 450 451 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey, 452 int indent, ASN1_PCTX *pctx) 453 { 454 if (pkey->ameth && pkey->ameth->priv_print) 455 return pkey->ameth->priv_print(out, pkey, indent, pctx); 456 457 return unsup_alg(out, pkey, indent, "Private Key"); 458 } 459 460 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey, 461 int indent, ASN1_PCTX *pctx) 462 { 463 if (pkey->ameth && pkey->ameth->param_print) 464 return pkey->ameth->param_print(out, pkey, indent, pctx); 465 return unsup_alg(out, pkey, indent, "Parameters"); 466 } 467 468 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid) 469 { 470 if (!pkey->ameth || !pkey->ameth->pkey_ctrl) 471 return -2; 472 return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 473 0, pnid); 474 } 475 476
