Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | |
| 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 | |