Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 174 | key->pkey = ret; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | } |