1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57 #include <openssl/evp.h> 58 59 #include <assert.h> 60 #include <string.h> 61 62 #include <openssl/bio.h> 63 #include <openssl/dsa.h> 64 #include <openssl/ec.h> 65 #include <openssl/err.h> 66 #include <openssl/mem.h> 67 #include <openssl/obj.h> 68 #include <openssl/rsa.h> 69 #include <openssl/thread.h> 70 71 #include "internal.h" 72 #include "../internal.h" 73 74 75 EVP_PKEY *EVP_PKEY_new(void) { 76 EVP_PKEY *ret; 77 78 ret = OPENSSL_malloc(sizeof(EVP_PKEY)); 79 if (ret == NULL) { 80 OPENSSL_PUT_ERROR(EVP, ERR_R_MALLOC_FAILURE); 81 return NULL; 82 } 83 84 memset(ret, 0, sizeof(EVP_PKEY)); 85 ret->type = EVP_PKEY_NONE; 86 ret->references = 1; 87 88 return ret; 89 } 90 91 static void free_it(EVP_PKEY *pkey) { 92 if (pkey->ameth && pkey->ameth->pkey_free) { 93 pkey->ameth->pkey_free(pkey); 94 pkey->pkey.ptr = NULL; 95 pkey->type = EVP_PKEY_NONE; 96 } 97 } 98 99 void EVP_PKEY_free(EVP_PKEY *pkey) { 100 if (pkey == NULL) { 101 return; 102 } 103 104 if (!CRYPTO_refcount_dec_and_test_zero(&pkey->references)) { 105 return; 106 } 107 108 free_it(pkey); 109 OPENSSL_free(pkey); 110 } 111 112 EVP_PKEY *EVP_PKEY_up_ref(EVP_PKEY *pkey) { 113 CRYPTO_refcount_inc(&pkey->references); 114 return pkey; 115 } 116 117 int EVP_PKEY_is_opaque(const EVP_PKEY *pkey) { 118 if (pkey->ameth && pkey->ameth->pkey_opaque) { 119 return pkey->ameth->pkey_opaque(pkey); 120 } 121 return 0; 122 } 123 124 int EVP_PKEY_supports_digest(const EVP_PKEY *pkey, const EVP_MD *md) { 125 if (pkey->ameth && pkey->ameth->pkey_supports_digest) { 126 return pkey->ameth->pkey_supports_digest(pkey, md); 127 } 128 return 1; 129 } 130 131 int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b) { 132 if (a->type != b->type) { 133 return -1; 134 } 135 136 if (a->ameth) { 137 int ret; 138 /* Compare parameters if the algorithm has them */ 139 if (a->ameth->param_cmp) { 140 ret = a->ameth->param_cmp(a, b); 141 if (ret <= 0) { 142 return ret; 143 } 144 } 145 146 if (a->ameth->pub_cmp) { 147 return a->ameth->pub_cmp(a, b); 148 } 149 } 150 151 return -2; 152 } 153 154 int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from) { 155 if (to->type != from->type) { 156 OPENSSL_PUT_ERROR(EVP, EVP_R_DIFFERENT_KEY_TYPES); 157 goto err; 158 } 159 160 if (EVP_PKEY_missing_parameters(from)) { 161 OPENSSL_PUT_ERROR(EVP, EVP_R_MISSING_PARAMETERS); 162 goto err; 163 } 164 165 if (from->ameth && from->ameth->param_copy) { 166 return from->ameth->param_copy(to, from); 167 } 168 169 err: 170 return 0; 171 } 172 173 int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey) { 174 if (pkey->ameth && pkey->ameth->param_missing) { 175 return pkey->ameth->param_missing(pkey); 176 } 177 return 0; 178 } 179 180 int EVP_PKEY_size(const EVP_PKEY *pkey) { 181 if (pkey && pkey->ameth && pkey->ameth->pkey_size) { 182 return pkey->ameth->pkey_size(pkey); 183 } 184 return 0; 185 } 186 187 int EVP_PKEY_bits(EVP_PKEY *pkey) { 188 if (pkey && pkey->ameth && pkey->ameth->pkey_bits) { 189 return pkey->ameth->pkey_bits(pkey); 190 } 191 return 0; 192 } 193 194 int EVP_PKEY_id(const EVP_PKEY *pkey) { 195 return pkey->type; 196 } 197 198 /* TODO(fork): remove the first argument. */ 199 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pengine, int nid) { 200 switch (nid) { 201 case EVP_PKEY_RSA: 202 case EVP_PKEY_RSA2: 203 return &rsa_asn1_meth; 204 case EVP_PKEY_EC: 205 return &ec_asn1_meth; 206 case EVP_PKEY_DSA: 207 return &dsa_asn1_meth; 208 default: 209 return NULL; 210 } 211 } 212 213 int EVP_PKEY_type(int nid) { 214 const EVP_PKEY_ASN1_METHOD *meth = EVP_PKEY_asn1_find(NULL, nid); 215 if (meth == NULL) { 216 return NID_undef; 217 } 218 return meth->pkey_id; 219 } 220 221 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) { 222 if (EVP_PKEY_assign_RSA(pkey, key)) { 223 RSA_up_ref(key); 224 return 1; 225 } 226 return 0; 227 } 228 229 int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key) { 230 return EVP_PKEY_assign(pkey, EVP_PKEY_RSA, key); 231 } 232 233 RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey) { 234 if (pkey->type != EVP_PKEY_RSA) { 235 OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_RSA_KEY); 236 return NULL; 237 } 238 return pkey->pkey.rsa; 239 } 240 241 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey) { 242 RSA *rsa = EVP_PKEY_get0_RSA(pkey); 243 if (rsa != NULL) { 244 RSA_up_ref(rsa); 245 } 246 return rsa; 247 } 248 249 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key) { 250 if (EVP_PKEY_assign_DSA(pkey, key)) { 251 DSA_up_ref(key); 252 return 1; 253 } 254 return 0; 255 } 256 257 int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key) { 258 return EVP_PKEY_assign(pkey, EVP_PKEY_DSA, key); 259 } 260 261 DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey) { 262 if (pkey->type != EVP_PKEY_DSA) { 263 OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_A_DSA_KEY); 264 return NULL; 265 } 266 return pkey->pkey.dsa; 267 } 268 269 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey) { 270 DSA *dsa = EVP_PKEY_get0_DSA(pkey); 271 if (dsa != NULL) { 272 DSA_up_ref(dsa); 273 } 274 return dsa; 275 } 276 277 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) { 278 if (EVP_PKEY_assign_EC_KEY(pkey, key)) { 279 EC_KEY_up_ref(key); 280 return 1; 281 } 282 return 0; 283 } 284 285 int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key) { 286 return EVP_PKEY_assign(pkey, EVP_PKEY_EC, key); 287 } 288 289 EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey) { 290 if (pkey->type != EVP_PKEY_EC) { 291 OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_EC_KEY_KEY); 292 return NULL; 293 } 294 return pkey->pkey.ec; 295 } 296 297 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey) { 298 EC_KEY *ec_key = EVP_PKEY_get0_EC_KEY(pkey); 299 if (ec_key != NULL) { 300 EC_KEY_up_ref(ec_key); 301 } 302 return ec_key; 303 } 304 305 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key) { 306 if (!EVP_PKEY_set_type(pkey, type)) { 307 return 0; 308 } 309 pkey->pkey.ptr = key; 310 return key != NULL; 311 } 312 313 const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pengine, 314 const char *name, 315 size_t len) { 316 if (len == 3 && memcmp(name, "RSA", 3) == 0) { 317 return &rsa_asn1_meth; 318 } if (len == 2 && memcmp(name, "EC", 2) == 0) { 319 return &ec_asn1_meth; 320 } else if (len == 3 && memcmp(name, "DSA", 3) == 0) { 321 return &dsa_asn1_meth; 322 } 323 return NULL; 324 } 325 326 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type) { 327 const EVP_PKEY_ASN1_METHOD *ameth; 328 329 if (pkey && pkey->pkey.ptr) { 330 free_it(pkey); 331 } 332 333 ameth = EVP_PKEY_asn1_find(NULL, type); 334 if (ameth == NULL) { 335 OPENSSL_PUT_ERROR(EVP, EVP_R_UNSUPPORTED_ALGORITHM); 336 ERR_add_error_dataf("algorithm %d (%s)", type, OBJ_nid2sn(type)); 337 return 0; 338 } 339 340 if (pkey) { 341 pkey->ameth = ameth; 342 pkey->type = pkey->ameth->pkey_id; 343 } 344 345 return 1; 346 } 347 348 349 350 int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b) { 351 if (a->type != b->type) { 352 return -1; 353 } 354 if (a->ameth && a->ameth->param_cmp) { 355 return a->ameth->param_cmp(a, b); 356 } 357 return -2; 358 } 359 360 static int print_unsupported(BIO *out, const EVP_PKEY *pkey, int indent, 361 const char *kstr) { 362 BIO_indent(out, indent, 128); 363 BIO_printf(out, "%s algorithm \"%s\" unsupported\n", kstr, 364 OBJ_nid2ln(pkey->type)); 365 return 1; 366 } 367 368 int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey, int indent, 369 ASN1_PCTX *pctx) { 370 if (pkey->ameth && pkey->ameth->pub_print) { 371 return pkey->ameth->pub_print(out, pkey, indent, pctx); 372 } 373 374 return print_unsupported(out, pkey, indent, "Public Key"); 375 } 376 377 int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey, int indent, 378 ASN1_PCTX *pctx) { 379 if (pkey->ameth && pkey->ameth->priv_print) { 380 return pkey->ameth->priv_print(out, pkey, indent, pctx); 381 } 382 383 return print_unsupported(out, pkey, indent, "Private Key"); 384 } 385 386 int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey, int indent, 387 ASN1_PCTX *pctx) { 388 if (pkey->ameth && pkey->ameth->param_print) { 389 return pkey->ameth->param_print(out, pkey, indent, pctx); 390 } 391 392 return print_unsupported(out, pkey, indent, "Parameters"); 393 } 394 395 int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md) { 396 return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD, 0, 397 (void *)md); 398 } 399 400 int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **out_md) { 401 return EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_GET_MD, 402 0, (void *)out_md); 403 } 404 405 void OpenSSL_add_all_algorithms(void) {} 406 407 void OpenSSL_add_all_ciphers(void) {} 408 409 void OpenSSL_add_all_digests(void) {} 410 411 void EVP_cleanup(void) {} 412
