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 xpk = d2i_X509_PUBKEY(NULL, pp, length); 192 if (!xpk) 193 return NULL; 194 pktmp = X509_PUBKEY_get(xpk); 195 X509_PUBKEY_free(xpk); 196 if (!pktmp) 197 return NULL; 198 if (a) { 199 EVP_PKEY_free(*a); 200 *a = pktmp; 201 } 202 return pktmp; 203} 204 205int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) 206{ 207 X509_PUBKEY *xpk = NULL; 208 int ret; 209 if (!a) 210 return 0; 211 if (!X509_PUBKEY_set(&xpk, a)) 212 return 0; 213 ret = i2d_X509_PUBKEY(xpk, pp); 214 X509_PUBKEY_free(xpk); 215 return ret; 216} 217 218/* 219 * The following are equivalents but which return RSA and DSA keys 220 */ 221#ifndef OPENSSL_NO_RSA 222RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length) 223{ 224 EVP_PKEY *pkey; 225 RSA *key; 226 const unsigned char *q; 227 q = *pp; 228 pkey = d2i_PUBKEY(NULL, &q, length); 229 if (!pkey) 230 return NULL; 231 key = EVP_PKEY_get1_RSA(pkey); 232 EVP_PKEY_free(pkey); 233 if (!key) 234 return NULL; 235 *pp = q; 236 if (a) { 237 RSA_free(*a); 238 *a = key; 239 } 240 return key; 241} 242 243int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) 244{ 245 EVP_PKEY *pktmp; 246 int ret; 247 if (!a) 248 return 0; 249 pktmp = EVP_PKEY_new(); 250 if (!pktmp) { 251 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); 252 return 0; 253 } 254 EVP_PKEY_set1_RSA(pktmp, a); 255 ret = i2d_PUBKEY(pktmp, pp); 256 EVP_PKEY_free(pktmp); 257 return ret; 258} 259#endif 260 261#ifndef OPENSSL_NO_DSA 262DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length) 263{ 264 EVP_PKEY *pkey; 265 DSA *key; 266 const unsigned char *q; 267 q = *pp; 268 pkey = d2i_PUBKEY(NULL, &q, length); 269 if (!pkey) 270 return NULL; 271 key = EVP_PKEY_get1_DSA(pkey); 272 EVP_PKEY_free(pkey); 273 if (!key) 274 return NULL; 275 *pp = q; 276 if (a) { 277 DSA_free(*a); 278 *a = key; 279 } 280 return key; 281} 282 283int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) 284{ 285 EVP_PKEY *pktmp; 286 int ret; 287 if (!a) 288 return 0; 289 pktmp = EVP_PKEY_new(); 290 if (!pktmp) { 291 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); 292 return 0; 293 } 294 EVP_PKEY_set1_DSA(pktmp, a); 295 ret = i2d_PUBKEY(pktmp, pp); 296 EVP_PKEY_free(pktmp); 297 return ret; 298} 299#endif 300 301#ifndef OPENSSL_NO_EC 302EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) 303{ 304 EVP_PKEY *pkey; 305 EC_KEY *key; 306 const unsigned char *q; 307 q = *pp; 308 pkey = d2i_PUBKEY(NULL, &q, length); 309 if (!pkey) 310 return (NULL); 311 key = EVP_PKEY_get1_EC_KEY(pkey); 312 EVP_PKEY_free(pkey); 313 if (!key) 314 return (NULL); 315 *pp = q; 316 if (a) { 317 EC_KEY_free(*a); 318 *a = key; 319 } 320 return (key); 321} 322 323int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) 324{ 325 EVP_PKEY *pktmp; 326 int ret; 327 if (!a) 328 return (0); 329 if ((pktmp = EVP_PKEY_new()) == NULL) { 330 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); 331 return (0); 332 } 333 EVP_PKEY_set1_EC_KEY(pktmp, a); 334 ret = i2d_PUBKEY(pktmp, pp); 335 EVP_PKEY_free(pktmp); 336 return (ret); 337} 338#endif 339 340int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, 341 int ptype, void *pval, 342 unsigned char *penc, int penclen) 343{ 344 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) 345 return 0; 346 if (penc) { 347 if (pub->public_key->data) 348 OPENSSL_free(pub->public_key->data); 349 pub->public_key->data = penc; 350 pub->public_key->length = penclen; 351 /* Set number of unused bits to zero */ 352 pub->public_key->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 353 pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT; 354 } 355 return 1; 356} 357 358int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, 359 const unsigned char **pk, int *ppklen, 360 X509_ALGOR **pa, X509_PUBKEY *pub) 361{ 362 if (ppkalg) 363 *ppkalg = pub->algor->algorithm; 364 if (pk) { 365 *pk = pub->public_key->data; 366 *ppklen = pub->public_key->length; 367 } 368 if (pa) 369 *pa = pub->algor; 370 return 1; 371} 372