1/* crypto/asn1/x_pubkey.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/asn1t.h> 62#include <openssl/x509.h> 63#include "asn1_locl.h" 64#ifndef OPENSSL_NO_RSA 65# include <openssl/rsa.h> 66#endif 67#ifndef OPENSSL_NO_DSA 68# include <openssl/dsa.h> 69#endif 70 71/* Minor tweak to operation: free up EVP_PKEY */ 72static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 73 void *exarg) 74{ 75 if (operation == ASN1_OP_FREE_POST) { 76 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; 77 EVP_PKEY_free(pubkey->pkey); 78 } 79 return 1; 80} 81 82ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { 83 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), 84 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) 85} ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) 86 87IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) 88 89int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) 90{ 91 X509_PUBKEY *pk = NULL; 92 93 if (x == NULL) 94 return (0); 95 96 if ((pk = X509_PUBKEY_new()) == NULL) 97 goto error; 98 99 if (pkey->ameth) { 100 if (pkey->ameth->pub_encode) { 101 if (!pkey->ameth->pub_encode(pk, pkey)) { 102 X509err(X509_F_X509_PUBKEY_SET, 103 X509_R_PUBLIC_KEY_ENCODE_ERROR); 104 goto error; 105 } 106 } else { 107 X509err(X509_F_X509_PUBKEY_SET, X509_R_METHOD_NOT_SUPPORTED); 108 goto error; 109 } 110 } else { 111 X509err(X509_F_X509_PUBKEY_SET, X509_R_UNSUPPORTED_ALGORITHM); 112 goto error; 113 } 114 115 if (*x != NULL) 116 X509_PUBKEY_free(*x); 117 118 *x = pk; 119 120 return 1; 121 error: 122 if (pk != NULL) 123 X509_PUBKEY_free(pk); 124 return 0; 125} 126 127EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) 128{ 129 EVP_PKEY *ret = NULL; 130 131 if (key == NULL) 132 goto error; 133 134 if (key->pkey != NULL) { 135 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); 136 return key->pkey; 137 } 138 139 if (key->public_key == NULL) 140 goto error; 141 142 if ((ret = EVP_PKEY_new()) == NULL) { 143 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); 144 goto error; 145 } 146 147 if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) { 148 X509err(X509_F_X509_PUBKEY_GET, X509_R_UNSUPPORTED_ALGORITHM); 149 goto error; 150 } 151 152 if (ret->ameth->pub_decode) { 153 if (!ret->ameth->pub_decode(ret, key)) { 154 X509err(X509_F_X509_PUBKEY_GET, X509_R_PUBLIC_KEY_DECODE_ERROR); 155 goto error; 156 } 157 } else { 158 X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED); 159 goto error; 160 } 161 162 /* Check to see if another thread set key->pkey first */ 163 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); 164 if (key->pkey) { 165 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 166 EVP_PKEY_free(ret); 167 ret = key->pkey; 168 } else { 169 key->pkey = ret; 170 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 171 } 172 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); 173 174 return ret; 175 176 error: 177 if (ret != NULL) 178 EVP_PKEY_free(ret); 179 return (NULL); 180} 181 182/* 183 * Now two pseudo ASN1 routines that take an EVP_PKEY structure and encode or 184 * decode as X509_PUBKEY 185 */ 186 187EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length) 188{ 189 X509_PUBKEY *xpk; 190 EVP_PKEY *pktmp; 191 const unsigned char *q; 192 q = *pp; 193 xpk = d2i_X509_PUBKEY(NULL, &q, length); 194 if (!xpk) 195 return NULL; 196 pktmp = X509_PUBKEY_get(xpk); 197 X509_PUBKEY_free(xpk); 198 if (!pktmp) 199 return NULL; 200 *pp = q; 201 if (a) { 202 EVP_PKEY_free(*a); 203 *a = pktmp; 204 } 205 return pktmp; 206} 207 208int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) 209{ 210 X509_PUBKEY *xpk = NULL; 211 int ret; 212 if (!a) 213 return 0; 214 if (!X509_PUBKEY_set(&xpk, a)) 215 return 0; 216 ret = i2d_X509_PUBKEY(xpk, pp); 217 X509_PUBKEY_free(xpk); 218 return ret; 219} 220 221/* 222 * The following are equivalents but which return RSA and DSA keys 223 */ 224#ifndef OPENSSL_NO_RSA 225RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) 226{ 227 EVP_PKEY *pkey; 228 RSA *key; 229 const unsigned char *q; 230 q = *pp; 231 pkey = d2i_PUBKEY(NULL, &q, length); 232 if (!pkey) 233 return NULL; 234 key = EVP_PKEY_get1_RSA(pkey); 235 EVP_PKEY_free(pkey); 236 if (!key) 237 return NULL; 238 *pp = q; 239 if (a) { 240 RSA_free(*a); 241 *a = key; 242 } 243 return key; 244} 245 246int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) 247{ 248 EVP_PKEY *pktmp; 249 int ret; 250 if (!a) 251 return 0; 252 pktmp = EVP_PKEY_new(); 253 if (!pktmp) { 254 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); 255 return 0; 256 } 257 EVP_PKEY_set1_RSA(pktmp, a); 258 ret = i2d_PUBKEY(pktmp, pp); 259 EVP_PKEY_free(pktmp); 260 return ret; 261} 262#endif 263 264#ifndef OPENSSL_NO_DSA 265DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) 266{ 267 EVP_PKEY *pkey; 268 DSA *key; 269 const unsigned char *q; 270 q = *pp; 271 pkey = d2i_PUBKEY(NULL, &q, length); 272 if (!pkey) 273 return NULL; 274 key = EVP_PKEY_get1_DSA(pkey); 275 EVP_PKEY_free(pkey); 276 if (!key) 277 return NULL; 278 *pp = q; 279 if (a) { 280 DSA_free(*a); 281 *a = key; 282 } 283 return key; 284} 285 286int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) 287{ 288 EVP_PKEY *pktmp; 289 int ret; 290 if (!a) 291 return 0; 292 pktmp = EVP_PKEY_new(); 293 if (!pktmp) { 294 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); 295 return 0; 296 } 297 EVP_PKEY_set1_DSA(pktmp, a); 298 ret = i2d_PUBKEY(pktmp, pp); 299 EVP_PKEY_free(pktmp); 300 return ret; 301} 302#endif 303 304#ifndef OPENSSL_NO_EC 305EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) 306{ 307 EVP_PKEY *pkey; 308 EC_KEY *key; 309 const unsigned char *q; 310 q = *pp; 311 pkey = d2i_PUBKEY(NULL, &q, length); 312 if (!pkey) 313 return (NULL); 314 key = EVP_PKEY_get1_EC_KEY(pkey); 315 EVP_PKEY_free(pkey); 316 if (!key) 317 return (NULL); 318 *pp = q; 319 if (a) { 320 EC_KEY_free(*a); 321 *a = key; 322 } 323 return (key); 324} 325 326int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) 327{ 328 EVP_PKEY *pktmp; 329 int ret; 330 if (!a) 331 return (0); 332 if ((pktmp = EVP_PKEY_new()) == NULL) { 333 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); 334 return (0); 335 } 336 EVP_PKEY_set1_EC_KEY(pktmp, a); 337 ret = i2d_PUBKEY(pktmp, pp); 338 EVP_PKEY_free(pktmp); 339 return (ret); 340} 341#endif 342 343int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, 344 int ptype, void *pval, 345 unsigned char *penc, int penclen) 346{ 347 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) 348 return 0; 349 if (penc) { 350 if (pub->public_key->data) 351 OPENSSL_free(pub->public_key->data); 352 pub->public_key->data = penc; 353 pub->public_key->length = penclen; 354 /* Set number of unused bits to zero */ 355 pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 356 pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; 357 } 358 return 1; 359} 360 361int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, 362 const unsigned char **pk, int *ppklen, 363 X509_ALGOR **pa, X509_PUBKEY *pub) 364{ 365 if (ppkalg) 366 *ppkalg = pub->algor->algorithm; 367 if (pk) { 368 *pk = pub->public_key->data; 369 *ppklen = pub->public_key->length; 370 } 371 if (pa) 372 *pa = pub->algor; 373 return 1; 374} 375