p_lib.c revision 280297
1/* crypto/evp/p_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 "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 83static void EVP_PKEY_free_it(EVP_PKEY *x); 84 85int 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 92int 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 99int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode) 100{ 101#ifndef OPENSSL_NO_DSA 102 if (pkey->type == EVP_PKEY_DSA) { 103 int ret = pkey->save_parameters; 104 105 if (mode >= 0) 106 pkey->save_parameters = mode; 107 return (ret); 108 } 109#endif 110#ifndef OPENSSL_NO_EC 111 if (pkey->type == EVP_PKEY_EC) { 112 int ret = pkey->save_parameters; 113 114 if (mode >= 0) 115 pkey->save_parameters = mode; 116 return (ret); 117 } 118#endif 119 return (0); 120} 121 122int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) 123{ 124 if (to->type != from->type) { 125 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES); 126 goto err; 127 } 128 129 if (EVP_PKEY_missing_parameters(from)) { 130 EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS); 131 goto err; 132 } 133 if (from->ameth && from->ameth->param_copy) 134 return from->ameth->param_copy(to, from); 135 err: 136 return 0; 137} 138 139int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) 140{ 141 if (pkey->ameth && pkey->ameth->param_missing) 142 return pkey->ameth->param_missing(pkey); 143 return 0; 144} 145 146int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) 147{ 148 if (a->type != b->type) 149 return -1; 150 if (a->ameth && a->ameth->param_cmp) 151 return a->ameth->param_cmp(a, b); 152 return -2; 153} 154 155int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) 156{ 157 if (a->type != b->type) 158 return -1; 159 160 if (a->ameth) { 161 int ret; 162 /* Compare parameters if the algorithm has them */ 163 if (a->ameth->param_cmp) { 164 ret = a->ameth->param_cmp(a, b); 165 if (ret <= 0) 166 return ret; 167 } 168 169 if (a->ameth->pub_cmp) 170 return a->ameth->pub_cmp(a, b); 171 } 172 173 return -2; 174} 175 176EVP_PKEY *EVP_PKEY_new(void) 177{ 178 EVP_PKEY *ret; 179 180 ret = (EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY)); 181 if (ret == NULL) { 182 EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE); 183 return (NULL); 184 } 185 ret->type = EVP_PKEY_NONE; 186 ret->save_type = EVP_PKEY_NONE; 187 ret->references = 1; 188 ret->ameth = NULL; 189 ret->engine = NULL; 190 ret->pkey.ptr = NULL; 191 ret->attributes = NULL; 192 ret->save_parameters = 1; 193 return (ret); 194} 195 196/* 197 * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey 198 * is NULL just return 1 or 0 if the algorithm exists. 199 */ 200 201static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len) 202{ 203 const EVP_PKEY_ASN1_METHOD *ameth; 204 ENGINE *e = NULL; 205 if (pkey) { 206 if (pkey->pkey.ptr) 207 EVP_PKEY_free_it(pkey); 208 /* 209 * If key type matches and a method exists then this lookup has 210 * succeeded once so just indicate success. 211 */ 212 if ((type == pkey->save_type) && pkey->ameth) 213 return 1; 214#ifndef OPENSSL_NO_ENGINE 215 /* If we have an ENGINE release it */ 216 if (pkey->engine) { 217 ENGINE_finish(pkey->engine); 218 pkey->engine = NULL; 219 } 220#endif 221 } 222 if (str) 223 ameth = EVP_PKEY_asn1_find_str(&e, str, len); 224 else 225 ameth = EVP_PKEY_asn1_find(&e, type); 226#ifndef OPENSSL_NO_ENGINE 227 if (!pkey && e) 228 ENGINE_finish(e); 229#endif 230 if (!ameth) { 231 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM); 232 return 0; 233 } 234 if (pkey) { 235 pkey->ameth = ameth; 236 pkey->engine = e; 237 238 pkey->type = pkey->ameth->pkey_id; 239 pkey->save_type = type; 240 } 241 return 1; 242} 243 244int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) 245{ 246 return pkey_set_type(pkey, type, NULL, -1); 247} 248 249int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len) 250{ 251 return pkey_set_type(pkey, EVP_PKEY_NONE, str, len); 252} 253 254int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) 255{ 256 if (!EVP_PKEY_set_type(pkey, type)) 257 return 0; 258 pkey->pkey.ptr = key; 259 return (key != NULL); 260} 261 262void *EVP_PKEY_get0(EVP_PKEY *pkey) 263{ 264 return pkey->pkey.ptr; 265} 266 267#ifndef OPENSSL_NO_RSA 268int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) 269{ 270 int ret = EVP_PKEY_assign_RSA(pkey, key); 271 if (ret) 272 RSA_up_ref(key); 273 return ret; 274} 275 276RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) 277{ 278 if (pkey->type != EVP_PKEY_RSA) { 279 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY); 280 return NULL; 281 } 282 RSA_up_ref(pkey->pkey.rsa); 283 return pkey->pkey.rsa; 284} 285#endif 286 287#ifndef OPENSSL_NO_DSA 288int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) 289{ 290 int ret = EVP_PKEY_assign_DSA(pkey, key); 291 if (ret) 292 DSA_up_ref(key); 293 return ret; 294} 295 296DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) 297{ 298 if (pkey->type != EVP_PKEY_DSA) { 299 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY); 300 return NULL; 301 } 302 DSA_up_ref(pkey->pkey.dsa); 303 return pkey->pkey.dsa; 304} 305#endif 306 307#ifndef OPENSSL_NO_EC 308 309int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) 310{ 311 int ret = EVP_PKEY_assign_EC_KEY(pkey, key); 312 if (ret) 313 EC_KEY_up_ref(key); 314 return ret; 315} 316 317EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) 318{ 319 if (pkey->type != EVP_PKEY_EC) { 320 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY); 321 return NULL; 322 } 323 EC_KEY_up_ref(pkey->pkey.ec); 324 return pkey->pkey.ec; 325} 326#endif 327 328#ifndef OPENSSL_NO_DH 329 330int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key) 331{ 332 int ret = EVP_PKEY_assign_DH(pkey, key); 333 if (ret) 334 DH_up_ref(key); 335 return ret; 336} 337 338DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey) 339{ 340 if (pkey->type != EVP_PKEY_DH) { 341 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY); 342 return NULL; 343 } 344 DH_up_ref(pkey->pkey.dh); 345 return pkey->pkey.dh; 346} 347#endif 348 349int EVP_PKEY_type(int type) 350{ 351 int ret; 352 const EVP_PKEY_ASN1_METHOD *ameth; 353 ENGINE *e; 354 ameth = EVP_PKEY_asn1_find(&e, type); 355 if (ameth) 356 ret = ameth->pkey_id; 357 else 358 ret = NID_undef; 359#ifndef OPENSSL_NO_ENGINE 360 if (e) 361 ENGINE_finish(e); 362#endif 363 return ret; 364} 365 366int EVP_PKEY_id(const EVP_PKEY *pkey) 367{ 368 return pkey->type; 369} 370 371int EVP_PKEY_base_id(const EVP_PKEY *pkey) 372{ 373 return EVP_PKEY_type(pkey->type); 374} 375 376void EVP_PKEY_free(EVP_PKEY *x) 377{ 378 int i; 379 380 if (x == NULL) 381 return; 382 383 i = CRYPTO_add(&x->references, -1, CRYPTO_LOCK_EVP_PKEY); 384#ifdef REF_PRINT 385 REF_PRINT("EVP_PKEY", x); 386#endif 387 if (i > 0) 388 return; 389#ifdef REF_CHECK 390 if (i < 0) { 391 fprintf(stderr, "EVP_PKEY_free, bad reference count\n"); 392 abort(); 393 } 394#endif 395 EVP_PKEY_free_it(x); 396 if (x->attributes) 397 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free); 398 OPENSSL_free(x); 399} 400 401static void EVP_PKEY_free_it(EVP_PKEY *x) 402{ 403 if (x->ameth && x->ameth->pkey_free) { 404 x->ameth->pkey_free(x); 405 x->pkey.ptr = NULL; 406 } 407#ifndef OPENSSL_NO_ENGINE 408 if (x->engine) { 409 ENGINE_finish(x->engine); 410 x->engine = NULL; 411 } 412#endif 413} 414 415static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent, 416 const char *kstr) 417{ 418 BIO_indent(out, indent, 128); 419 BIO_printf(out, "%s algorithm \"%s\" unsupported\n", 420 kstr, OBJ_nid2ln(pkey->type)); 421 return 1; 422} 423 424int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey, 425 int indent, ASN1_PCTX *pctx) 426{ 427 if (pkey->ameth && pkey->ameth->pub_print) 428 return pkey->ameth->pub_print(out, pkey, indent, pctx); 429 430 return unsup_alg(out, pkey, indent, "Public Key"); 431} 432 433int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey, 434 int indent, ASN1_PCTX *pctx) 435{ 436 if (pkey->ameth && pkey->ameth->priv_print) 437 return pkey->ameth->priv_print(out, pkey, indent, pctx); 438 439 return unsup_alg(out, pkey, indent, "Private Key"); 440} 441 442int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey, 443 int indent, ASN1_PCTX *pctx) 444{ 445 if (pkey->ameth && pkey->ameth->param_print) 446 return pkey->ameth->param_print(out, pkey, indent, pctx); 447 return unsup_alg(out, pkey, indent, "Parameters"); 448} 449 450int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid) 451{ 452 if (!pkey->ameth || !pkey->ameth->pkey_ctrl) 453 return -2; 454 return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 455 0, pnid); 456} 457