crypto/asn1/x_pubkey.c

   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
  64 /* Minor tweak to operation: free up EVP_PKEY */
  65 static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
  66         {
  67         if (operation == ASN1_OP_FREE_POST)
  68                 {
  69                 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
  70                 EVP_PKEY_free(pubkey->pkey);
  71                 }
  72         return 1;
  73         }
  74
  75 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
  76         ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
  77         ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
  78 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
  79
  80 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
  81
  82 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
  83         {
  84         int ok=0;
  85         X509_PUBKEY *pk;
  86         X509_ALGOR *a;
  87         ASN1_OBJECT *o;
  88         unsigned char *s,*p;
  89         int i;
  90
  91         if (x == NULL) return(0);
  92
  93         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
  94         a=pk->algor;
  95
  96         /* set the algorithm id */
  97         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
  98         ASN1_OBJECT_free(a->algorithm);
  99         a->algorithm=o;
 100
 101         /* Set the parameter list */
 102         if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
 103                 {
 104                 if ((a->parameter == NULL) ||
 105                         (a->parameter->type != V_ASN1_NULL))
 106                         {
 107                         ASN1_TYPE_free(a->parameter);
 108                         a->parameter=ASN1_TYPE_new();
 109                         a->parameter->type=V_ASN1_NULL;
 110                         }
 111                 }
 112 #ifndef OPENSSL_NO_DSA
 113         else if (pkey->type == EVP_PKEY_DSA)
 114                 {
 115                 unsigned char *pp;
 116                 DSA *dsa;
 117
 118                 dsa=pkey->pkey.dsa;
 119                 dsa->write_params=0;
 120                 ASN1_TYPE_free(a->parameter);
 121                 i=i2d_DSAparams(dsa,NULL);
 122                 p=(unsigned char *)OPENSSL_malloc(i);
 123                 pp=p;
 124                 i2d_DSAparams(dsa,&pp);
 125                 a->parameter=ASN1_TYPE_new();
 126                 a->parameter->type=V_ASN1_SEQUENCE;
 127                 a->parameter->value.sequence=ASN1_STRING_new();
 128                 ASN1_STRING_set(a->parameter->value.sequence,p,i);
 129                 OPENSSL_free(p);
 130                 }
 131 #endif
 132 #ifndef OPENSSL_NO_ECDSA
 133         else if (pkey->type == EVP_PKEY_ECDSA)
 134                 {
 135                 unsigned char *pp;
 136                 ECDSA *ecdsa;
 137
 138                 ecdsa = pkey->pkey.ecdsa;
 139                 ecdsa->write_params=0;
 140                 ASN1_TYPE_free(a->parameter);
 141                 if ((i = i2d_ECDSAParameters(ecdsa, NULL)) == 0)
 142                         {
 143                         X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
 144                         goto err;
 145                         }
 146                 if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
 147                         {
 148                         X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
 149                         goto err;
 150                         }
 151                 pp = p;
 152                 if (!i2d_ECDSAParameters(ecdsa, &pp))
 153                         {
 154                         X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_LIB);
 155                         OPENSSL_free(p);
 156                         goto err;
 157                         }
 158                 if ((a->parameter = ASN1_TYPE_new()) == NULL)
 159                         {
 160                         X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
 161                         OPENSSL_free(p);
 162                         goto err;
 163                         }
 164                 a->parameter->type = V_ASN1_SEQUENCE;
 165                 if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
 166                         {
 167                         X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
 168                         OPENSSL_free(p);
 169                         goto err;
 170                         }
 171                 ASN1_STRING_set(a->parameter->value.sequence, p, i);
 172                 OPENSSL_free(p);
 173                 }
 174 #endif
 175         else if (1)
 176                 {
 177                 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
 178                 goto err;
 179                 }
 180
 181         if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
 182         if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL) goto err;
 183         p=s;
 184         i2d_PublicKey(pkey,&p);
 185         if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
 186         /* Set number of unused bits to zero */
 187         pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 188         pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 189
 190         OPENSSL_free(s);
 191
 192 #if 0
 193         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 194         pk->pkey=pkey;
 195 #endif
 196
 197         if (*x != NULL)
 198                 X509_PUBKEY_free(*x);
 199
 200         *x=pk;
 201         pk=NULL;
 202
 203         ok=1;
 204 err:
 205         if (pk != NULL) X509_PUBKEY_free(pk);
 206         return(ok);
 207         }
 208
 209 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
 210         {
 211         EVP_PKEY *ret=NULL;
 212         long j;
 213         int type;
 214         unsigned char *p;
 215 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
 216         const unsigned char *cp;
 217         X509_ALGOR *a;
 218 #endif
 219
 220         if (key == NULL) goto err;
 221
 222         if (key->pkey != NULL)
 223                 {
 224                 CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
 225                 return(key->pkey);
 226                 }
 227
 228         if (key->public_key == NULL) goto err;
 229
 230         type=OBJ_obj2nid(key->algor->algorithm);
 231         if ((ret = EVP_PKEY_new()) == NULL)
 232                 {
 233                 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
 234                 goto err;
 235                 }
 236         ret->type = EVP_PKEY_type(type);
 237
 238         /* the parameters must be extracted before the public key (ECDSA!) */
 239
 240 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
 241         a=key->algor;
 242 #endif
 243
 244         if (0)
 245                 ;
 246 #ifndef OPENSSL_NO_DSA
 247         else if (ret->type == EVP_PKEY_DSA)
 248                 {
 249                 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
 250                         {
 251                         if ((ret->pkey.dsa = DSA_new()) == NULL)
 252                                 {
 253                                 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
 254                                 goto err;
 255                                 }
 256                         ret->pkey.dsa->write_params=0;
 257                         cp=p=a->parameter->value.sequence->data;
 258                         j=a->parameter->value.sequence->length;
 259                         if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
 260                                 goto err;
 261                         }
 262                 ret->save_parameters=1;
 263                 }
 264 #endif
 265 #ifndef OPENSSL_NO_ECDSA
 266         else if (ret->type == EVP_PKEY_ECDSA)
 267                 {
 268                 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
 269                         {
 270                         if ((ret->pkey.ecdsa= ECDSA_new()) == NULL)
 271                                 {
 272                                 X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
 273                                 goto err;
 274                                 }
 275                         ret->pkey.ecdsa->write_params = 0;
 276                         cp = p = a->parameter->value.sequence->data;
 277                         j = a->parameter->value.sequence->length;
 278                         if (!d2i_ECDSAParameters(&ret->pkey.ecdsa, &cp, (long)j))
 279                                 {
 280                                 X509err(X509_F_X509_PUBKEY_GET, ERR_R_ECDSA_LIB);
 281                                 goto err;
 282                                 }
 283                         }
 284                 ret->save_parameters = 1;
 285                 }
 286 #endif
 287
 288         p=key->public_key->data;
 289         j=key->public_key->length;
 290         if ((ret = d2i_PublicKey(type, &ret, &p, (long)j)) == NULL)
 291                 {
 292                 X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
 293                 goto err;
 294                 }
 295
 296         key->pkey = ret;
 297         CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
 298         return(ret);
 299 err:
 300         if (ret != NULL)
 301                 EVP_PKEY_free(ret);
 302         return(NULL);
 303         }
 304
 305 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
 306  * and encode or decode as X509_PUBKEY
 307  */
 308
 309 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp,
 310              long length)
 311         {
 312         X509_PUBKEY *xpk;
 313         EVP_PKEY *pktmp;
 314         xpk = d2i_X509_PUBKEY(NULL, pp, length);
 315         if(!xpk) return NULL;
 316         pktmp = X509_PUBKEY_get(xpk);
 317         X509_PUBKEY_free(xpk);
 318         if(!pktmp) return NULL;
 319         if(a)
 320                 {
 321                 EVP_PKEY_free(*a);
 322                 *a = pktmp;
 323                 }
 324         return pktmp;
 325         }
 326
 327 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
 328         {
 329         X509_PUBKEY *xpk=NULL;
 330         int ret;
 331         if(!a) return 0;
 332         if(!X509_PUBKEY_set(&xpk, a)) return 0;
 333         ret = i2d_X509_PUBKEY(xpk, pp);
 334         X509_PUBKEY_free(xpk);
 335         return ret;
 336         }
 337
 338 /* The following are equivalents but which return RSA and DSA
 339  * keys
 340  */
 341 #ifndef OPENSSL_NO_RSA
 342 RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp,
 343              long length)
 344         {
 345         EVP_PKEY *pkey;
 346         RSA *key;
 347         unsigned char *q;
 348         q = *pp;
 349         pkey = d2i_PUBKEY(NULL, &q, length);
 350         if (!pkey) return NULL;
 351         key = EVP_PKEY_get1_RSA(pkey);
 352         EVP_PKEY_free(pkey);
 353         if (!key) return NULL;
 354         *pp = q;
 355         if (a)
 356                 {
 357                 RSA_free(*a);
 358                 *a = key;
 359                 }
 360         return key;
 361         }
 362
 363 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
 364         {
 365         EVP_PKEY *pktmp;
 366         int ret;
 367         if (!a) return 0;
 368         pktmp = EVP_PKEY_new();
 369         if (!pktmp)
 370                 {
 371                 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
 372                 return 0;
 373                 }
 374         EVP_PKEY_set1_RSA(pktmp, a);
 375         ret = i2d_PUBKEY(pktmp, pp);
 376         EVP_PKEY_free(pktmp);
 377         return ret;
 378         }
 379 #endif
 380
 381 #ifndef OPENSSL_NO_DSA
 382 DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp,
 383              long length)
 384         {
 385         EVP_PKEY *pkey;
 386         DSA *key;
 387         unsigned char *q;
 388         q = *pp;
 389         pkey = d2i_PUBKEY(NULL, &q, length);
 390         if (!pkey) return NULL;
 391         key = EVP_PKEY_get1_DSA(pkey);
 392         EVP_PKEY_free(pkey);
 393         if (!key) return NULL;
 394         *pp = q;
 395         if (a)
 396                 {
 397                 DSA_free(*a);
 398                 *a = key;
 399                 }
 400         return key;
 401         }
 402
 403 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
 404         {
 405         EVP_PKEY *pktmp;
 406         int ret;
 407         if(!a) return 0;
 408         pktmp = EVP_PKEY_new();
 409         if(!pktmp)
 410                 {
 411                 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
 412                 return 0;
 413                 }
 414         EVP_PKEY_set1_DSA(pktmp, a);
 415         ret = i2d_PUBKEY(pktmp, pp);
 416         EVP_PKEY_free(pktmp);
 417         return ret;
 418         }
 419 #endif
 420
 421 #ifndef OPENSSL_NO_ECDSA
 422 ECDSA *d2i_ECDSA_PUBKEY(ECDSA **a, unsigned char **pp, long length)
 423         {
 424         EVP_PKEY *pkey;
 425         ECDSA *key;
 426         unsigned char *q;
 427         q = *pp;
 428         pkey = d2i_PUBKEY(NULL, &q, length);
 429         if (!pkey) return(NULL);
 430         key = EVP_PKEY_get1_ECDSA(pkey);
 431         EVP_PKEY_free(pkey);
 432         if (!key)  return(NULL);
 433         *pp = q;
 434         if (a)
 435                 {
 436                 ECDSA_free(*a);
 437                 *a = key;
 438                 }
 439         return(key);
 440         }
 441
 442 int i2d_ECDSA_PUBKEY(ECDSA *a, unsigned char **pp)
 443         {
 444         EVP_PKEY *pktmp;
 445         int ret;
 446         if (!a) return(0);
 447         if ((pktmp = EVP_PKEY_new()) == NULL)
 448                 {
 449                 ASN1err(ASN1_F_I2D_ECDSA_PUBKEY, ERR_R_MALLOC_FAILURE);
 450                 return(0);
 451                 }
 452         EVP_PKEY_set1_ECDSA(pktmp, a);
 453         ret = i2d_PUBKEY(pktmp, pp);
 454         EVP_PKEY_free(pktmp);
 455         return(ret);
 456         }
 457 #endif