1 /* $OpenBSD: x_pubkey.c,v 1.22 2014/07/12 16:03:36 miod Exp $ */ 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 61 #include <openssl/opensslconf.h> 62 63 #include <openssl/asn1t.h> 64 #include <openssl/err.h> 65 #include <openssl/x509.h> 66 67 #ifndef OPENSSL_NO_DSA 68 #include <openssl/dsa.h> 69 #endif 70 #ifndef OPENSSL_NO_RSA 71 #include <openssl/rsa.h> 72 #endif 73 74 #include "asn1_locl.h" 75 76 /* Minor tweak to operation: free up EVP_PKEY */ 77 static int 78 pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg) 79 { 80 if (operation == ASN1_OP_FREE_POST) { 81 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; 82 EVP_PKEY_free(pubkey->pkey); 83 } 84 return 1; 85 } 86 87 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { 88 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), 89 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) 90 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) 91 92 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) 93 94 int 95 X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) 96 { 97 X509_PUBKEY *pk = NULL; 98 99 if (x == NULL) 100 return (0); 101 if ((pk = X509_PUBKEY_new()) == NULL) 102 goto error; 103 104 if (pkey->ameth) { 105 if (pkey->ameth->pub_encode) { 106 if (!pkey->ameth->pub_encode(pk, pkey)) { 107 X509err(X509_F_X509_PUBKEY_SET, 108 X509_R_PUBLIC_KEY_ENCODE_ERROR); 109 goto error; 110 } 111 } else { 112 X509err(X509_F_X509_PUBKEY_SET, 113 X509_R_METHOD_NOT_SUPPORTED); 114 goto error; 115 } 116 } else { 117 X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); 118 goto error; 119 } 120 121 if (*x != NULL) 122 X509_PUBKEY_free(*x); 123 124 *x = pk; 125 126 return 1; 127 128 error: 129 if (pk != NULL) 130 X509_PUBKEY_free(pk); 131 return 0; 132 } 133 134 EVP_PKEY * 135 X509_PUBKEY_get(X509_PUBKEY *key) 136 { 137 EVP_PKEY *ret = NULL; 138 139 if (key == NULL) 140 goto error; 141 142 if (key->pkey != NULL) { 143 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); 144 return key->pkey; 145 } 146 147 if (key->public_key == NULL) 148 goto error; 149 150 if ((ret = EVP_PKEY_new()) == NULL) { 151 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); 152 goto error; 153 } 154 155 if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) { 156 X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM); 157 goto error; 158 } 159 160 if (ret->ameth->pub_decode) { 161 if (!ret->ameth->pub_decode(ret, key)) { 162 X509err(X509_F_X509_PUBKEY_GET, 163 X509_R_PUBLIC_KEY_DECODE_ERROR); 164 goto error; 165 } 166 } else { 167 X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED); 168 goto error; 169 } 170 171 /* Check to see if another thread set key->pkey first */ 172 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); 173 if (key->pkey) { 174 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 175 EVP_PKEY_free(ret); 176 ret = key->pkey; 177 } else { 178 key->pkey = ret; 179 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 180 } 181 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); 182 183 return ret; 184 185 error: 186 EVP_PKEY_free(ret); 187 return (NULL); 188 } 189 190 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure 191 * and encode or decode as X509_PUBKEY 192 */ 193 194 EVP_PKEY * 195 d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) 196 { 197 X509_PUBKEY *xpk; 198 EVP_PKEY *pktmp; 199 xpk = d2i_X509_PUBKEY(NULL, pp, length); 200 if (!xpk) 201 return NULL; 202 pktmp = X509_PUBKEY_get(xpk); 203 X509_PUBKEY_free(xpk); 204 if (!pktmp) 205 return NULL; 206 if (a) { 207 EVP_PKEY_free(*a); 208 *a = pktmp; 209 } 210 return pktmp; 211 } 212 213 int 214 i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) 215 { 216 X509_PUBKEY *xpk = NULL; 217 int ret; 218 if (!a) 219 return 0; 220 if (!X509_PUBKEY_set(&xpk, a)) 221 return 0; 222 ret = i2d_X509_PUBKEY(xpk, pp); 223 X509_PUBKEY_free(xpk); 224 return ret; 225 } 226 227 /* The following are equivalents but which return RSA and DSA 228 * keys 229 */ 230 #ifndef OPENSSL_NO_RSA 231 RSA * 232 d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) 233 { 234 EVP_PKEY *pkey; 235 RSA *key; 236 const unsigned char *q; 237 q = *pp; 238 pkey = d2i_PUBKEY(NULL, &q, length); 239 if (!pkey) 240 return NULL; 241 key = EVP_PKEY_get1_RSA(pkey); 242 EVP_PKEY_free(pkey); 243 if (!key) 244 return NULL; 245 *pp = q; 246 if (a) { 247 RSA_free(*a); 248 *a = key; 249 } 250 return key; 251 } 252 253 int 254 i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) 255 { 256 EVP_PKEY *pktmp; 257 int ret; 258 if (!a) 259 return 0; 260 pktmp = EVP_PKEY_new(); 261 if (!pktmp) { 262 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); 263 return 0; 264 } 265 EVP_PKEY_set1_RSA(pktmp, a); 266 ret = i2d_PUBKEY(pktmp, pp); 267 EVP_PKEY_free(pktmp); 268 return ret; 269 } 270 #endif 271 272 #ifndef OPENSSL_NO_DSA 273 DSA * 274 d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) 275 { 276 EVP_PKEY *pkey; 277 DSA *key; 278 const unsigned char *q; 279 q = *pp; 280 pkey = d2i_PUBKEY(NULL, &q, length); 281 if (!pkey) 282 return NULL; 283 key = EVP_PKEY_get1_DSA(pkey); 284 EVP_PKEY_free(pkey); 285 if (!key) 286 return NULL; 287 *pp = q; 288 if (a) { 289 DSA_free(*a); 290 *a = key; 291 } 292 return key; 293 } 294 295 int 296 i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) 297 { 298 EVP_PKEY *pktmp; 299 int ret; 300 if (!a) 301 return 0; 302 pktmp = EVP_PKEY_new(); 303 if (!pktmp) { 304 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); 305 return 0; 306 } 307 EVP_PKEY_set1_DSA(pktmp, a); 308 ret = i2d_PUBKEY(pktmp, pp); 309 EVP_PKEY_free(pktmp); 310 return ret; 311 } 312 #endif 313 314 #ifndef OPENSSL_NO_EC 315 EC_KEY * 316 d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) 317 { 318 EVP_PKEY *pkey; 319 EC_KEY *key; 320 const unsigned char *q; 321 q = *pp; 322 pkey = d2i_PUBKEY(NULL, &q, length); 323 if (!pkey) 324 return (NULL); 325 key = EVP_PKEY_get1_EC_KEY(pkey); 326 EVP_PKEY_free(pkey); 327 if (!key) 328 return (NULL); 329 *pp = q; 330 if (a) { 331 EC_KEY_free(*a); 332 *a = key; 333 } 334 return (key); 335 } 336 337 int 338 i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) 339 { 340 EVP_PKEY *pktmp; 341 int ret; 342 if (!a) 343 return (0); 344 if ((pktmp = EVP_PKEY_new()) == NULL) { 345 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); 346 return (0); 347 } 348 EVP_PKEY_set1_EC_KEY(pktmp, a); 349 ret = i2d_PUBKEY(pktmp, pp); 350 EVP_PKEY_free(pktmp); 351 return (ret); 352 } 353 #endif 354 355 int 356 X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype, 357 void *pval, unsigned char *penc, int penclen) 358 { 359 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) 360 return 0; 361 if (penc) { 362 free(pub->public_key->data); 363 pub->public_key->data = penc; 364 pub->public_key->length = penclen; 365 /* Set number of unused bits to zero */ 366 pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); 367 pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; 368 } 369 return 1; 370 } 371 372 int 373 X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk, 374 int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub) 375 { 376 if (ppkalg) 377 *ppkalg = pub->algor->algorithm; 378 if (pk) { 379 *pk = pub->public_key->data; 380 *ppklen = pub->public_key->length; 381 } 382 if (pa) 383 *pa = pub->algor; 384 return 1; 385 } 386