1 /* crypto/asn1/x_pubkey.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 */ 72 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, 73 void *exarg) 74 { 75 if (operation == ASN1_OP_FREE_POST) 76 { 77 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval; 78 EVP_PKEY_free(pubkey->pkey); 79 } 80 return 1; 81 } 82 83 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = { 84 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR), 85 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING) 86 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY) 87 88 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY) 89 90 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey) 91 { 92 X509_PUBKEY *pk=NULL; 93 94 if (x == NULL) return(0); 95 96 if ((pk=X509_PUBKEY_new()) == NULL) goto error; 97 98 if (pkey->ameth) 99 { 100 if (pkey->ameth->pub_encode) 101 { 102 if (!pkey->ameth->pub_encode(pk, pkey)) 103 { 104 X509err(X509_F_X509_PUBKEY_SET, 105 X509_R_PUBLIC_KEY_ENCODE_ERROR); 106 goto error; 107 } 108 } 109 else 110 { 111 X509err(X509_F_X509_PUBKEY_SET, 112 X509_R_METHOD_NOT_SUPPORTED); 113 goto error; 114 } 115 } 116 else 117 { 118 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM); 119 goto error; 120 } 121 122 if (*x != NULL) 123 X509_PUBKEY_free(*x); 124 125 *x=pk; 126 127 return 1; 128 error: 129 if (pk != NULL) X509_PUBKEY_free(pk); 130 return 0; 131 } 132 133 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key) 134 { 135 EVP_PKEY *ret=NULL; 136 137 if (key == NULL) goto error; 138 139 if (key->pkey != NULL) 140 { 141 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); 142 return key->pkey; 143 } 144 145 if (key->public_key == NULL) goto error; 146 147 if ((ret = EVP_PKEY_new()) == NULL) 148 { 149 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE); 150 goto error; 151 } 152 153 if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) 154 { 155 X509err(X509_F_X509_PUBKEY_GET,X509_R_UNSUPPORTED_ALGORITHM); 156 goto error; 157 } 158 159 if (ret->ameth->pub_decode) 160 { 161 if (!ret->ameth->pub_decode(ret, key)) 162 { 163 X509err(X509_F_X509_PUBKEY_GET, 164 X509_R_PUBLIC_KEY_DECODE_ERROR); 165 goto error; 166 } 167 } 168 else 169 { 170 X509err(X509_F_X509_PUBKEY_GET, X509_R_METHOD_NOT_SUPPORTED); 171 goto error; 172 } 173 174 /* Check to see if another thread set key->pkey first */ 175 CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY); 176 if (key->pkey) 177 { 178 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 179 EVP_PKEY_free(ret); 180 ret = key->pkey; 181 } 182 else 183 { 184 key->pkey = ret; 185 CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY); 186 } 187 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); 188 189 return ret; 190 191 error: 192 if (ret != NULL) 193 EVP_PKEY_free(ret); 194 return(NULL); 195 } 196 197 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure 198 * and encode or decode as X509_PUBKEY 199 */ 200 201 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, 202 long length) 203 { 204 X509_PUBKEY *xpk; 205 EVP_PKEY *pktmp; 206 xpk = d2i_X509_PUBKEY(NULL, pp, length); 207 if(!xpk) return NULL; 208 pktmp = X509_PUBKEY_get(xpk); 209 X509_PUBKEY_free(xpk); 210 if(!pktmp) return NULL; 211 if(a) 212 { 213 EVP_PKEY_free(*a); 214 *a = pktmp; 215 } 216 return pktmp; 217 } 218 219 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) 220 { 221 X509_PUBKEY *xpk=NULL; 222 int ret; 223 if(!a) return 0; 224 if(!X509_PUBKEY_set(&xpk, a)) return 0; 225 ret = i2d_X509_PUBKEY(xpk, pp); 226 X509_PUBKEY_free(xpk); 227 return ret; 228 } 229 230 /* The following are equivalents but which return RSA and DSA 231 * keys 232 */ 233 #ifndef OPENSSL_NO_RSA 234 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, 235 long length) 236 { 237 EVP_PKEY *pkey; 238 RSA *key; 239 const unsigned char *q; 240 q = *pp; 241 pkey = d2i_PUBKEY(NULL, &q, length); 242 if (!pkey) return NULL; 243 key = EVP_PKEY_get1_RSA(pkey); 244 EVP_PKEY_free(pkey); 245 if (!key) return NULL; 246 *pp = q; 247 if (a) 248 { 249 RSA_free(*a); 250 *a = key; 251 } 252 return key; 253 } 254 255 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) 256 { 257 EVP_PKEY *pktmp; 258 int ret; 259 if (!a) return 0; 260 pktmp = EVP_PKEY_new(); 261 if (!pktmp) 262 { 263 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE); 264 return 0; 265 } 266 EVP_PKEY_set1_RSA(pktmp, a); 267 ret = i2d_PUBKEY(pktmp, pp); 268 EVP_PKEY_free(pktmp); 269 return ret; 270 } 271 #endif 272 273 #ifndef OPENSSL_NO_DSA 274 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, 275 long length) 276 { 277 EVP_PKEY *pkey; 278 DSA *key; 279 const unsigned char *q; 280 q = *pp; 281 pkey = d2i_PUBKEY(NULL, &q, length); 282 if (!pkey) return NULL; 283 key = EVP_PKEY_get1_DSA(pkey); 284 EVP_PKEY_free(pkey); 285 if (!key) return NULL; 286 *pp = q; 287 if (a) 288 { 289 DSA_free(*a); 290 *a = key; 291 } 292 return key; 293 } 294 295 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) 296 { 297 EVP_PKEY *pktmp; 298 int ret; 299 if(!a) return 0; 300 pktmp = EVP_PKEY_new(); 301 if(!pktmp) 302 { 303 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE); 304 return 0; 305 } 306 EVP_PKEY_set1_DSA(pktmp, a); 307 ret = i2d_PUBKEY(pktmp, pp); 308 EVP_PKEY_free(pktmp); 309 return ret; 310 } 311 #endif 312 313 #ifndef OPENSSL_NO_EC 314 EC_KEY *d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length) 315 { 316 EVP_PKEY *pkey; 317 EC_KEY *key; 318 const unsigned char *q; 319 q = *pp; 320 pkey = d2i_PUBKEY(NULL, &q, length); 321 if (!pkey) return(NULL); 322 key = EVP_PKEY_get1_EC_KEY(pkey); 323 EVP_PKEY_free(pkey); 324 if (!key) return(NULL); 325 *pp = q; 326 if (a) 327 { 328 EC_KEY_free(*a); 329 *a = key; 330 } 331 return(key); 332 } 333 334 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) 335 { 336 EVP_PKEY *pktmp; 337 int ret; 338 if (!a) return(0); 339 if ((pktmp = EVP_PKEY_new()) == NULL) 340 { 341 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); 342 return(0); 343 } 344 EVP_PKEY_set1_EC_KEY(pktmp, a); 345 ret = i2d_PUBKEY(pktmp, pp); 346 EVP_PKEY_free(pktmp); 347 return(ret); 348 } 349 #endif 350 351 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, 352 int ptype, void *pval, 353 unsigned char *penc, int penclen) 354 { 355 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) 356 return 0; 357 if (penc) 358 { 359 if (pub->public_key->data) 360 OPENSSL_free(pub->public_key->data); 361 pub->public_key->data = penc; 362 pub->public_key->length = penclen; 363 /* Set number of unused bits to zero */ 364 pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); 365 pub->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT; 366 } 367 return 1; 368 } 369 370 int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, 371 const unsigned char **pk, int *ppklen, 372 X509_ALGOR **pa, 373 X509_PUBKEY *pub) 374 { 375 if (ppkalg) 376 *ppkalg = pub->algor->algorithm; 377 if (pk) 378 { 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
