1 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL 2 * project 2006. 3 */ 4 /* ==================================================================== 5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * 3. All advertising materials mentioning features or use of this 20 * software must display the following acknowledgment: 21 * "This product includes software developed by the OpenSSL Project 22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 23 * 24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25 * endorse or promote products derived from this software without 26 * prior written permission. For written permission, please contact 27 * licensing (at) OpenSSL.org. 28 * 29 * 5. Products derived from this software may not be called "OpenSSL" 30 * nor may "OpenSSL" appear in their names without prior written 31 * permission of the OpenSSL Project. 32 * 33 * 6. Redistributions of any form whatsoever must retain the following 34 * acknowledgment: 35 * "This product includes software developed by the OpenSSL Project 36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49 * OF THE POSSIBILITY OF SUCH DAMAGE. 50 * ==================================================================== 51 * 52 * This product includes cryptographic software written by Eric Young 53 * (eay (at) cryptsoft.com). This product includes software written by Tim 54 * Hudson (tjh (at) cryptsoft.com). 55 * 56 */ 57 58 #include <stdio.h> 59 #include "cryptlib.h" 60 #include <openssl/asn1t.h> 61 #include <openssl/x509.h> 62 #ifndef OPENSSL_NO_ENGINE 63 #include <openssl/engine.h> 64 #endif 65 #include "asn1_locl.h" 66 67 extern const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[]; 68 extern const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[]; 69 extern const EVP_PKEY_ASN1_METHOD dh_asn1_meth; 70 extern const EVP_PKEY_ASN1_METHOD eckey_asn1_meth; 71 extern const EVP_PKEY_ASN1_METHOD hmac_asn1_meth; 72 extern const EVP_PKEY_ASN1_METHOD cmac_asn1_meth; 73 74 /* Keep this sorted in type order !! */ 75 static const EVP_PKEY_ASN1_METHOD *standard_methods[] = 76 { 77 #ifndef OPENSSL_NO_RSA 78 &rsa_asn1_meths[0], 79 &rsa_asn1_meths[1], 80 #endif 81 #ifndef OPENSSL_NO_DH 82 &dh_asn1_meth, 83 #endif 84 #ifndef OPENSSL_NO_DSA 85 &dsa_asn1_meths[0], 86 &dsa_asn1_meths[1], 87 &dsa_asn1_meths[2], 88 &dsa_asn1_meths[3], 89 &dsa_asn1_meths[4], 90 #endif 91 #ifndef OPENSSL_NO_EC 92 &eckey_asn1_meth, 93 #endif 94 &hmac_asn1_meth, 95 &cmac_asn1_meth 96 }; 97 98 typedef int sk_cmp_fn_type(const char * const *a, const char * const *b); 99 DECLARE_STACK_OF(EVP_PKEY_ASN1_METHOD) 100 static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL; 101 102 103 104 #ifdef TEST 105 void main() 106 { 107 int i; 108 for (i = 0; 109 i < sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *); 110 i++) 111 fprintf(stderr, "Number %d id=%d (%s)\n", i, 112 standard_methods[i]->pkey_id, 113 OBJ_nid2sn(standard_methods[i]->pkey_id)); 114 } 115 #endif 116 117 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *, 118 const EVP_PKEY_ASN1_METHOD *, ameth); 119 120 static int ameth_cmp(const EVP_PKEY_ASN1_METHOD * const *a, 121 const EVP_PKEY_ASN1_METHOD * const *b) 122 { 123 return ((*a)->pkey_id - (*b)->pkey_id); 124 } 125 126 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *, 127 const EVP_PKEY_ASN1_METHOD *, ameth); 128 129 int EVP_PKEY_asn1_get_count(void) 130 { 131 int num = sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *); 132 if (app_methods) 133 num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods); 134 return num; 135 } 136 137 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx) 138 { 139 int num = sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *); 140 if (idx < 0) 141 return NULL; 142 if (idx < num) 143 return standard_methods[idx]; 144 idx -= num; 145 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx); 146 } 147 148 static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type) 149 { 150 EVP_PKEY_ASN1_METHOD tmp; 151 const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret; 152 tmp.pkey_id = type; 153 if (app_methods) 154 { 155 int idx; 156 idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp); 157 if (idx >= 0) 158 return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx); 159 } 160 ret = OBJ_bsearch_ameth(&t, standard_methods, 161 sizeof(standard_methods) 162 /sizeof(EVP_PKEY_ASN1_METHOD *)); 163 if (!ret || !*ret) 164 return NULL; 165 return *ret; 166 } 167 168 /* Find an implementation of an ASN1 algorithm. If 'pe' is not NULL 169 * also search through engines and set *pe to a functional reference 170 * to the engine implementing 'type' or NULL if no engine implements 171 * it. 172 */ 173 174 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type) 175 { 176 const EVP_PKEY_ASN1_METHOD *t; 177 178 for (;;) 179 { 180 t = pkey_asn1_find(type); 181 if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS)) 182 break; 183 type = t->pkey_base_id; 184 } 185 if (pe) 186 { 187 #ifndef OPENSSL_NO_ENGINE 188 ENGINE *e; 189 /* type will contain the final unaliased type */ 190 e = ENGINE_get_pkey_asn1_meth_engine(type); 191 if (e) 192 { 193 *pe = e; 194 return ENGINE_get_pkey_asn1_meth(e, type); 195 } 196 #endif 197 *pe = NULL; 198 } 199 return t; 200 } 201 202 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe, 203 const char *str, int len) 204 { 205 int i; 206 const EVP_PKEY_ASN1_METHOD *ameth; 207 if (len == -1) 208 len = strlen(str); 209 if (pe) 210 { 211 #ifndef OPENSSL_NO_ENGINE 212 ENGINE *e; 213 ameth = ENGINE_pkey_asn1_find_str(&e, str, len); 214 if (ameth) 215 { 216 /* Convert structural into 217 * functional reference 218 */ 219 if (!ENGINE_init(e)) 220 ameth = NULL; 221 ENGINE_free(e); 222 *pe = e; 223 return ameth; 224 } 225 #endif 226 *pe = NULL; 227 } 228 for (i = 0; i < EVP_PKEY_asn1_get_count(); i++) 229 { 230 ameth = EVP_PKEY_asn1_get0(i); 231 if (ameth->pkey_flags & ASN1_PKEY_ALIAS) 232 continue; 233 if (((int)strlen(ameth->pem_str) == len) && 234 !strncasecmp(ameth->pem_str, str, len)) 235 return ameth; 236 } 237 return NULL; 238 } 239 240 int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth) 241 { 242 if (app_methods == NULL) 243 { 244 app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp); 245 if (!app_methods) 246 return 0; 247 } 248 if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth)) 249 return 0; 250 sk_EVP_PKEY_ASN1_METHOD_sort(app_methods); 251 return 1; 252 } 253 254 int EVP_PKEY_asn1_add_alias(int to, int from) 255 { 256 EVP_PKEY_ASN1_METHOD *ameth; 257 ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL); 258 if (!ameth) 259 return 0; 260 ameth->pkey_base_id = to; 261 return EVP_PKEY_asn1_add0(ameth); 262 } 263 264 int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id, int *ppkey_flags, 265 const char **pinfo, const char **ppem_str, 266 const EVP_PKEY_ASN1_METHOD *ameth) 267 { 268 if (!ameth) 269 return 0; 270 if (ppkey_id) 271 *ppkey_id = ameth->pkey_id; 272 if (ppkey_base_id) 273 *ppkey_base_id = ameth->pkey_base_id; 274 if (ppkey_flags) 275 *ppkey_flags = ameth->pkey_flags; 276 if (pinfo) 277 *pinfo = ameth->info; 278 if (ppem_str) 279 *ppem_str = ameth->pem_str; 280 return 1; 281 } 282 283 const EVP_PKEY_ASN1_METHOD* EVP_PKEY_get0_asn1(EVP_PKEY *pkey) 284 { 285 return pkey->ameth; 286 } 287 288 EVP_PKEY_ASN1_METHOD* EVP_PKEY_asn1_new(int id, int flags, 289 const char *pem_str, const char *info) 290 { 291 EVP_PKEY_ASN1_METHOD *ameth; 292 ameth = OPENSSL_malloc(sizeof(EVP_PKEY_ASN1_METHOD)); 293 if (!ameth) 294 return NULL; 295 296 memset(ameth, 0, sizeof(EVP_PKEY_ASN1_METHOD)); 297 298 ameth->pkey_id = id; 299 ameth->pkey_base_id = id; 300 ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC; 301 302 if (info) 303 { 304 ameth->info = BUF_strdup(info); 305 if (!ameth->info) 306 goto err; 307 } 308 else 309 ameth->info = NULL; 310 311 if (pem_str) 312 { 313 ameth->pem_str = BUF_strdup(pem_str); 314 if (!ameth->pem_str) 315 goto err; 316 } 317 else 318 ameth->pem_str = NULL; 319 320 ameth->pub_decode = 0; 321 ameth->pub_encode = 0; 322 ameth->pub_cmp = 0; 323 ameth->pub_print = 0; 324 325 ameth->priv_decode = 0; 326 ameth->priv_encode = 0; 327 ameth->priv_print = 0; 328 329 ameth->old_priv_encode = 0; 330 ameth->old_priv_decode = 0; 331 332 ameth->item_verify = 0; 333 ameth->item_sign = 0; 334 335 ameth->pkey_size = 0; 336 ameth->pkey_bits = 0; 337 338 ameth->param_decode = 0; 339 ameth->param_encode = 0; 340 ameth->param_missing = 0; 341 ameth->param_copy = 0; 342 ameth->param_cmp = 0; 343 ameth->param_print = 0; 344 345 ameth->pkey_free = 0; 346 ameth->pkey_ctrl = 0; 347 348 return ameth; 349 350 err: 351 352 EVP_PKEY_asn1_free(ameth); 353 return NULL; 354 355 } 356 357 void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst, 358 const EVP_PKEY_ASN1_METHOD *src) 359 { 360 361 dst->pub_decode = src->pub_decode; 362 dst->pub_encode = src->pub_encode; 363 dst->pub_cmp = src->pub_cmp; 364 dst->pub_print = src->pub_print; 365 366 dst->priv_decode = src->priv_decode; 367 dst->priv_encode = src->priv_encode; 368 dst->priv_print = src->priv_print; 369 370 dst->old_priv_encode = src->old_priv_encode; 371 dst->old_priv_decode = src->old_priv_decode; 372 373 dst->pkey_size = src->pkey_size; 374 dst->pkey_bits = src->pkey_bits; 375 376 dst->param_decode = src->param_decode; 377 dst->param_encode = src->param_encode; 378 dst->param_missing = src->param_missing; 379 dst->param_copy = src->param_copy; 380 dst->param_cmp = src->param_cmp; 381 dst->param_print = src->param_print; 382 383 dst->pkey_free = src->pkey_free; 384 dst->pkey_ctrl = src->pkey_ctrl; 385 386 dst->item_sign = src->item_sign; 387 dst->item_verify = src->item_verify; 388 389 } 390 391 void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth) 392 { 393 if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC)) 394 { 395 if (ameth->pem_str) 396 OPENSSL_free(ameth->pem_str); 397 if (ameth->info) 398 OPENSSL_free(ameth->info); 399 OPENSSL_free(ameth); 400 } 401 } 402 403 void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth, 404 int (*pub_decode)(EVP_PKEY *pk, X509_PUBKEY *pub), 405 int (*pub_encode)(X509_PUBKEY *pub, const EVP_PKEY *pk), 406 int (*pub_cmp)(const EVP_PKEY *a, const EVP_PKEY *b), 407 int (*pub_print)(BIO *out, const EVP_PKEY *pkey, int indent, 408 ASN1_PCTX *pctx), 409 int (*pkey_size)(const EVP_PKEY *pk), 410 int (*pkey_bits)(const EVP_PKEY *pk)) 411 { 412 ameth->pub_decode = pub_decode; 413 ameth->pub_encode = pub_encode; 414 ameth->pub_cmp = pub_cmp; 415 ameth->pub_print = pub_print; 416 ameth->pkey_size = pkey_size; 417 ameth->pkey_bits = pkey_bits; 418 } 419 420 void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth, 421 int (*priv_decode)(EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf), 422 int (*priv_encode)(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk), 423 int (*priv_print)(BIO *out, const EVP_PKEY *pkey, int indent, 424 ASN1_PCTX *pctx)) 425 { 426 ameth->priv_decode = priv_decode; 427 ameth->priv_encode = priv_encode; 428 ameth->priv_print = priv_print; 429 } 430 431 void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth, 432 int (*param_decode)(EVP_PKEY *pkey, 433 const unsigned char **pder, int derlen), 434 int (*param_encode)(const EVP_PKEY *pkey, unsigned char **pder), 435 int (*param_missing)(const EVP_PKEY *pk), 436 int (*param_copy)(EVP_PKEY *to, const EVP_PKEY *from), 437 int (*param_cmp)(const EVP_PKEY *a, const EVP_PKEY *b), 438 int (*param_print)(BIO *out, const EVP_PKEY *pkey, int indent, 439 ASN1_PCTX *pctx)) 440 { 441 ameth->param_decode = param_decode; 442 ameth->param_encode = param_encode; 443 ameth->param_missing = param_missing; 444 ameth->param_copy = param_copy; 445 ameth->param_cmp = param_cmp; 446 ameth->param_print = param_print; 447 } 448 449 void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth, 450 void (*pkey_free)(EVP_PKEY *pkey)) 451 { 452 ameth->pkey_free = pkey_free; 453 } 454 455 void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth, 456 int (*pkey_ctrl)(EVP_PKEY *pkey, int op, 457 long arg1, void *arg2)) 458 { 459 ameth->pkey_ctrl = pkey_ctrl; 460 } 461
