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 /* Setup a public key ASN1 method and ENGINE from a NID or a string. 204 * If pkey is NULL just return 1 or 0 if the algorithm exists. 205 */ 206 207 static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len) 208 { 209 const EVP_PKEY_ASN1_METHOD *ameth; 210 ENGINE *e = NULL; 211 if (pkey) 212 { 213 if (pkey->pkey.ptr) 214 EVP_PKEY_free_it(pkey); 215 /* If key type matches and a method exists then this 216 * lookup has succeeded once so just indicate success. 217 */ 218 if ((type == pkey->save_type) && pkey->ameth) 219 return 1; 220 #ifndef OPENSSL_NO_ENGINE 221 /* If we have an ENGINE release it */ 222 if (pkey->engine) 223 { 224 ENGINE_finish(pkey->engine); 225 pkey->engine = NULL; 226 } 227 #endif 228 } 229 if (str) 230 ameth = EVP_PKEY_asn1_find_str(&e, str, len); 231 else 232 ameth = EVP_PKEY_asn1_find(&e, type); 233 #ifndef OPENSSL_NO_ENGINE 234 if (!pkey && e) 235 ENGINE_finish(e); 236 #endif 237 if (!ameth) 238 { 239 EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM); 240 return 0; 241 } 242 if (pkey) 243 { 244 pkey->ameth = ameth; 245 pkey->engine = e; 246 247 pkey->type = pkey->ameth->pkey_id; 248 pkey->save_type=type; 249 } 250 return 1; 251 } 252 253 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) 254 { 255 return pkey_set_type(pkey, type, NULL, -1); 256 } 257 258 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len) 259 { 260 return pkey_set_type(pkey, EVP_PKEY_NONE, str, len); 261 } 262 263 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) 264 { 265 if (!EVP_PKEY_set_type(pkey, type)) 266 return 0; 267 pkey->pkey.ptr=key; 268 return (key != NULL); 269 } 270 271 void *EVP_PKEY_get0(EVP_PKEY *pkey) 272 { 273 return pkey->pkey.ptr; 274 } 275 276 #ifndef OPENSSL_NO_RSA 277 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) 278 { 279 int ret = EVP_PKEY_assign_RSA(pkey, key); 280 if(ret) 281 RSA_up_ref(key); 282 return ret; 283 } 284 285 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) 286 { 287 if(pkey->type != EVP_PKEY_RSA) { 288 EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY); 289 return NULL; 290 } 291 RSA_up_ref(pkey->pkey.rsa); 292 return pkey->pkey.rsa; 293 } 294 #endif 295 296 #ifndef OPENSSL_NO_DSA 297 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) 298 { 299 int ret = EVP_PKEY_assign_DSA(pkey, key); 300 if(ret) 301 DSA_up_ref(key); 302 return ret; 303 } 304 305 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) 306 { 307 if(pkey->type != EVP_PKEY_DSA) { 308 EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY); 309 return NULL; 310 } 311 DSA_up_ref(pkey->pkey.dsa); 312 return pkey->pkey.dsa; 313 } 314 #endif 315 316 #ifndef OPENSSL_NO_EC 317 318 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) 319 { 320 int ret = EVP_PKEY_assign_EC_KEY(pkey,key); 321 if (ret) 322 EC_KEY_up_ref(key); 323 return ret; 324 } 325 326 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) 327 { 328 if (pkey->type != EVP_PKEY_EC) 329 { 330 EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY); 331 return NULL; 332 } 333 EC_KEY_up_ref(pkey->pkey.ec); 334 return pkey->pkey.ec; 335 } 336 #endif 337 338 339 #ifndef OPENSSL_NO_DH 340 341 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key) 342 { 343 int ret = EVP_PKEY_assign_DH(pkey, key); 344 if(ret) 345 DH_up_ref(key); 346 return ret; 347 } 348 349 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey) 350 { 351 if(pkey->type != EVP_PKEY_DH) { 352 EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY); 353 return NULL; 354 } 355 DH_up_ref(pkey->pkey.dh); 356 return pkey->pkey.dh; 357 } 358 #endif 359 360 int EVP_PKEY_type(int type) 361 { 362 int ret; 363 const EVP_PKEY_ASN1_METHOD *ameth; 364 ENGINE *e; 365 ameth = EVP_PKEY_asn1_find(&e, type); 366 if (ameth) 367 ret = ameth->pkey_id; 368 else 369 ret = NID_undef; 370 #ifndef OPENSSL_NO_ENGINE 371 if (e) 372 ENGINE_finish(e); 373 #endif 374 return ret; 375 } 376 377 int EVP_PKEY_id(const EVP_PKEY *pkey) 378 { 379 return pkey->type; 380 } 381 382 int EVP_PKEY_base_id(const EVP_PKEY *pkey) 383 { 384 return EVP_PKEY_type(pkey->type); 385 } 386 387 void EVP_PKEY_free(EVP_PKEY *x) 388 { 389 int i; 390 391 if (x == NULL) return; 392 393 i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY); 394 #ifdef REF_PRINT 395 REF_PRINT("EVP_PKEY",x); 396 #endif 397 if (i > 0) return; 398 #ifdef REF_CHECK 399 if (i < 0) 400 { 401 fprintf(stderr,"EVP_PKEY_free, bad reference count\n"); 402 abort(); 403 } 404 #endif 405 EVP_PKEY_free_it(x); 406 if (x->attributes) 407 sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free); 408 OPENSSL_free(x); 409 } 410 411 static void EVP_PKEY_free_it(EVP_PKEY *x) 412 { 413 if (x->ameth && x->ameth->pkey_free) 414 { 415 x->ameth->pkey_free(x); 416 x->pkey.ptr = NULL; 417 } 418 #ifndef OPENSSL_NO_ENGINE 419 if (x->engine) 420 { 421 ENGINE_finish(x->engine); 422 x->engine = NULL; 423 } 424 #endif 425 } 426 427 static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent, 428 const char *kstr) 429 { 430 BIO_indent(out, indent, 128); 431 BIO_printf(out, "%s algorithm \"%s\" unsupported\n", 432 kstr, OBJ_nid2ln(pkey->type)); 433 return 1; 434 } 435 436 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey, 437 int indent, ASN1_PCTX *pctx) 438 { 439 if (pkey->ameth && pkey->ameth->pub_print) 440 return pkey->ameth->pub_print(out, pkey, indent, pctx); 441 442 return unsup_alg(out, pkey, indent, "Public Key"); 443 } 444 445 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey, 446 int indent, ASN1_PCTX *pctx) 447 { 448 if (pkey->ameth && pkey->ameth->priv_print) 449 return pkey->ameth->priv_print(out, pkey, indent, pctx); 450 451 return unsup_alg(out, pkey, indent, "Private Key"); 452 } 453 454 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey, 455 int indent, ASN1_PCTX *pctx) 456 { 457 if (pkey->ameth && pkey->ameth->param_print) 458 return pkey->ameth->param_print(out, pkey, indent, pctx); 459 return unsup_alg(out, pkey, indent, "Parameters"); 460 } 461 462 int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid) 463 { 464 if (!pkey->ameth || !pkey->ameth->pkey_ctrl) 465 return -2; 466 return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 467 0, pnid); 468 } 469 470
