crypto/openssl-0.9.7d/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                 X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
  69                 EVP_PKEY_free(pubkey->pkey);
  70         }
  71         return 1;
  72 }
  73
  74 ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
  75         ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
  76         ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
  77 } ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
  78
  79 IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
  80
  81 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
  82         {
  83         int ok=0;
  84         X509_PUBKEY *pk;
  85         X509_ALGOR *a;
  86         ASN1_OBJECT *o;
  87         unsigned char *s,*p = NULL;
  88         int i;
  89
  90         if (x == NULL) return(0);
  91
  92         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
  93         a=pk->algor;
  94
  95         /* set the algorithm id */
  96         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
  97         ASN1_OBJECT_free(a->algorithm);
  98         a->algorithm=o;
  99
 100         /* Set the parameter list */
 101         if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
 102                 {
 103                 if ((a->parameter == NULL) ||
 104                         (a->parameter->type != V_ASN1_NULL))
 105                         {
 106                         ASN1_TYPE_free(a->parameter);
 107                         a->parameter=ASN1_TYPE_new();
 108                         a->parameter->type=V_ASN1_NULL;
 109                         }
 110                 }
 111         else
 112 #ifndef OPENSSL_NO_DSA
 113                 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                 if ((p=(unsigned char *)OPENSSL_malloc(i)) == NULL) goto err;
 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         else
 132 #endif
 133                 {
 134                 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
 135                 goto err;
 136                 }
 137
 138         if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
 139         if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
 140                 {
 141                 X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
 142                 goto err;
 143                 }
 144         p=s;
 145         i2d_PublicKey(pkey,&p);
 146         if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
 147         /* Set number of unused bits to zero */
 148         pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 149         pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 150
 151         OPENSSL_free(s);
 152
 153 #if 0
 154         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 155         pk->pkey=pkey;
 156 #endif
 157
 158         if (*x != NULL)
 159                 X509_PUBKEY_free(*x);
 160
 161         *x=pk;
 162         pk=NULL;
 163
 164         ok=1;
 165 err:
 166         if (pk != NULL) X509_PUBKEY_free(pk);
 167         return(ok);
 168         }
 169
 170 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
 171         {
 172         EVP_PKEY *ret=NULL;
 173         long j;
 174         int type;
 175         unsigned char *p;
 176 #ifndef OPENSSL_NO_DSA
 177         const unsigned char *cp;
 178         X509_ALGOR *a;
 179 #endif
 180
 181         if (key == NULL) goto err;
 182
 183         if (key->pkey != NULL)
 184             {
 185             CRYPTO_add(&key->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 186             return(key->pkey);
 187             }
 188
 189         if (key->public_key == NULL) goto err;
 190
 191         type=OBJ_obj2nid(key->algor->algorithm);
 192         p=key->public_key->data;
 193         j=key->public_key->length;
 194         if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
 195                 {
 196                 X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
 197                 goto err;
 198                 }
 199         ret->save_parameters=0;
 200
 201 #ifndef OPENSSL_NO_DSA
 202         a=key->algor;
 203         if (ret->type == EVP_PKEY_DSA)
 204                 {
 205                 if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
 206                         {
 207                         ret->pkey.dsa->write_params=0;
 208                         cp=p=a->parameter->value.sequence->data;
 209                         j=a->parameter->value.sequence->length;
 210                         if (!d2i_DSAparams(&ret->pkey.dsa,&cp,(long)j))
 211                                 goto err;
 212                         }
 213                 ret->save_parameters=1;
 214                 }
 215 #endif
 216         key->pkey=ret;
 217         CRYPTO_add(&ret->references,1,CRYPTO_LOCK_EVP_PKEY);
 218         return(ret);
 219 err:
 220         if (ret != NULL)
 221                 EVP_PKEY_free(ret);
 222         return(NULL);
 223         }
 224
 225 /* Now two pseudo ASN1 routines that take an EVP_PKEY structure
 226  * and encode or decode as X509_PUBKEY
 227  */
 228
 229 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp,
 230              long length)
 231 {
 232         X509_PUBKEY *xpk;
 233         EVP_PKEY *pktmp;
 234         xpk = d2i_X509_PUBKEY(NULL, pp, length);
 235         if(!xpk) return NULL;
 236         pktmp = X509_PUBKEY_get(xpk);
 237         X509_PUBKEY_free(xpk);
 238         if(!pktmp) return NULL;
 239         if(a) {
 240                 EVP_PKEY_free(*a);
 241                 *a = pktmp;
 242         }
 243         return pktmp;
 244 }
 245
 246 int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
 247 {
 248         X509_PUBKEY *xpk=NULL;
 249         int ret;
 250         if(!a) return 0;
 251         if(!X509_PUBKEY_set(&xpk, a)) return 0;
 252         ret = i2d_X509_PUBKEY(xpk, pp);
 253         X509_PUBKEY_free(xpk);
 254         return ret;
 255 }
 256
 257 /* The following are equivalents but which return RSA and DSA
 258  * keys
 259  */
 260 #ifndef OPENSSL_NO_RSA
 261 RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp,
 262              long length)
 263 {
 264         EVP_PKEY *pkey;
 265         RSA *key;
 266         unsigned char *q;
 267         q = *pp;
 268         pkey = d2i_PUBKEY(NULL, &q, length);
 269         if(!pkey) return NULL;
 270         key = EVP_PKEY_get1_RSA(pkey);
 271         EVP_PKEY_free(pkey);
 272         if(!key) return NULL;
 273         *pp = q;
 274         if(a) {
 275                 RSA_free(*a);
 276                 *a = key;
 277         }
 278         return key;
 279 }
 280
 281 int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
 282 {
 283         EVP_PKEY *pktmp;
 284         int ret;
 285         if(!a) return 0;
 286         pktmp = EVP_PKEY_new();
 287         if(!pktmp) {
 288                 ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
 289                 return 0;
 290         }
 291         EVP_PKEY_set1_RSA(pktmp, a);
 292         ret = i2d_PUBKEY(pktmp, pp);
 293         EVP_PKEY_free(pktmp);
 294         return ret;
 295 }
 296 #endif
 297
 298 #ifndef OPENSSL_NO_DSA
 299 DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp,
 300              long length)
 301 {
 302         EVP_PKEY *pkey;
 303         DSA *key;
 304         unsigned char *q;
 305         q = *pp;
 306         pkey = d2i_PUBKEY(NULL, &q, length);
 307         if(!pkey) return NULL;
 308         key = EVP_PKEY_get1_DSA(pkey);
 309         EVP_PKEY_free(pkey);
 310         if(!key) return NULL;
 311         *pp = q;
 312         if(a) {
 313                 DSA_free(*a);
 314                 *a = key;
 315         }
 316         return key;
 317 }
 318
 319 int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
 320 {
 321         EVP_PKEY *pktmp;
 322         int ret;
 323         if(!a) return 0;
 324         pktmp = EVP_PKEY_new();
 325         if(!pktmp) {
 326                 ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
 327                 return 0;
 328         }
 329         EVP_PKEY_set1_DSA(pktmp, a);
 330         ret = i2d_PUBKEY(pktmp, pp);
 331         EVP_PKEY_free(pktmp);
 332         return ret;
 333 }
 334 #endif