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 */ 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 key->pkey = ret; 175 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY); 176 177 return ret; 178 179 error: 180 if (ret != NULL) 181 EVP_PKEY_free(ret); 182 return(NULL); 183 } 184 185 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure 186 * and encode or decode as X509_PUBKEY 187 */ 188 189 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, 190 long length) 191 { 192 X509_PUBKEY *xpk; 193 EVP_PKEY *pktmp; 194 xpk = d2i_X509_PUBKEY(NULL, pp, length); 195 if(!xpk) return NULL; 196 pktmp = X509_PUBKEY_get(xpk); 197 X509_PUBKEY_free(xpk); 198 if(!pktmp) return NULL; 199 if(a) 200 { 201 EVP_PKEY_free(*a); 202 *a = pktmp; 203 } 204 return pktmp; 205 } 206 207 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp) 208 { 209 X509_PUBKEY *xpk=NULL; 210 int ret; 211 if(!a) return 0; 212 if(!X509_PUBKEY_set(&xpk, a)) return 0; 213 ret = i2d_X509_PUBKEY(xpk, pp); 214 X509_PUBKEY_free(xpk); 215 return ret; 216 } 217 218 /* The following are equivalents but which return RSA and DSA 219 * keys 220 */ 221 #ifndef OPENSSL_NO_RSA 222 RSA *d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, 223 long length) 224 { 225 EVP_PKEY *pkey; 226 RSA *key; 227 const unsigned char *q; 228 q = *pp; 229 pkey = d2i_PUBKEY(NULL, &q, length); 230 if (!pkey) return NULL; 231 key = EVP_PKEY_get1_RSA(pkey); 232 EVP_PKEY_free(pkey); 233 if (!key) return NULL; 234 *pp = q; 235 if (a) 236 { 237 RSA_free(*a); 238 *a = key; 239 } 240 return key; 241 } 242 243 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp) 244 { 245 EVP_PKEY *pktmp; 246 int ret; 247 if (!a) return 0; 248 pktmp = EVP_PKEY_new(); 249 if (!pktmp) 250 { 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 262 DSA *d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, 263 long length) 264 { 265 EVP_PKEY *pkey; 266 DSA *key; 267 const unsigned char *q; 268 q = *pp; 269 pkey = d2i_PUBKEY(NULL, &q, length); 270 if (!pkey) return NULL; 271 key = EVP_PKEY_get1_DSA(pkey); 272 EVP_PKEY_free(pkey); 273 if (!key) return NULL; 274 *pp = q; 275 if (a) 276 { 277 DSA_free(*a); 278 *a = key; 279 } 280 return key; 281 } 282 283 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp) 284 { 285 EVP_PKEY *pktmp; 286 int ret; 287 if(!a) return 0; 288 pktmp = EVP_PKEY_new(); 289 if(!pktmp) 290 { 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 302 EC_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) return(NULL); 310 key = EVP_PKEY_get1_EC_KEY(pkey); 311 EVP_PKEY_free(pkey); 312 if (!key) return(NULL); 313 *pp = q; 314 if (a) 315 { 316 EC_KEY_free(*a); 317 *a = key; 318 } 319 return(key); 320 } 321 322 int i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp) 323 { 324 EVP_PKEY *pktmp; 325 int ret; 326 if (!a) return(0); 327 if ((pktmp = EVP_PKEY_new()) == NULL) 328 { 329 ASN1err(ASN1_F_I2D_EC_PUBKEY, ERR_R_MALLOC_FAILURE); 330 return(0); 331 } 332 EVP_PKEY_set1_EC_KEY(pktmp, a); 333 ret = i2d_PUBKEY(pktmp, pp); 334 EVP_PKEY_free(pktmp); 335 return(ret); 336 } 337 #endif 338 339 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, 340 int ptype, void *pval, 341 unsigned char *penc, int penclen) 342 { 343 if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval)) 344 return 0; 345 if (penc) 346 { 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 } 357 358 int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, 359 const unsigned char **pk, int *ppklen, 360 X509_ALGOR **pa, 361 X509_PUBKEY *pub) 362 { 363 if (ppkalg) 364 *ppkalg = pub->algor->algorithm; 365 if (pk) 366 { 367 *pk = pub->public_key->data; 368 *ppklen = pub->public_key->length; 369 } 370 if (pa) 371 *pa = pub->algor; 372 return 1; 373 } 374