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/asn1_mac.h>
  62
  63 int i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **pp)
  64         {
  65         M_ASN1_I2D_vars(a);
  66
  67         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
  68         M_ASN1_I2D_len(a->public_key,   i2d_ASN1_BIT_STRING);
  69
  70         M_ASN1_I2D_seq_total();
  71
  72         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
  73         M_ASN1_I2D_put(a->public_key,   i2d_ASN1_BIT_STRING);
  74
  75         M_ASN1_I2D_finish();
  76         }
  77
  78 X509_PUBKEY *d2i_X509_PUBKEY(X509_PUBKEY **a, unsigned char **pp,
  79              long length)
  80         {
  81         M_ASN1_D2I_vars(a,X509_PUBKEY *,X509_PUBKEY_new);
  82
  83         M_ASN1_D2I_Init();
  84         M_ASN1_D2I_start_sequence();
  85         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
  86         M_ASN1_D2I_get(ret->public_key,d2i_ASN1_BIT_STRING);
  87         if (ret->pkey != NULL)
  88                 {
  89                 EVP_PKEY_free(ret->pkey);
  90                 ret->pkey=NULL;
  91                 }
  92         M_ASN1_D2I_Finish(a,X509_PUBKEY_free,ASN1_F_D2I_X509_PUBKEY);
  93         }
  94
  95 X509_PUBKEY *X509_PUBKEY_new(void)
  96         {
  97         X509_PUBKEY *ret=NULL;
  98         ASN1_CTX c;
  99
 100         M_ASN1_New_Malloc(ret,X509_PUBKEY);
 101         M_ASN1_New(ret->algor,X509_ALGOR_new);
 102         M_ASN1_New(ret->public_key,ASN1_BIT_STRING_new);
 103         ret->pkey=NULL;
 104         return(ret);
 105         M_ASN1_New_Error(ASN1_F_X509_PUBKEY_NEW);
 106         }
 107
 108 void X509_PUBKEY_free(X509_PUBKEY *a)
 109         {
 110         if (a == NULL) return;
 111         X509_ALGOR_free(a->algor);
 112         ASN1_BIT_STRING_free(a->public_key);
 113         if (a->pkey != NULL) EVP_PKEY_free(a->pkey);
 114         Free((char *)a);
 115         }
 116
 117 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
 118         {
 119         int ok=0;
 120         X509_PUBKEY *pk;
 121         X509_ALGOR *a;
 122         ASN1_OBJECT *o;
 123         unsigned char *s,*p;
 124         int i;
 125
 126         if (x == NULL) return(0);
 127
 128         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
 129         a=pk->algor;
 130
 131         /* set the algorithm id */
 132         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
 133         ASN1_OBJECT_free(a->algorithm);
 134         a->algorithm=o;
 135
 136         /* Set the parameter list */
 137         if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
 138                 {
 139                 if ((a->parameter == NULL) ||
 140                         (a->parameter->type != V_ASN1_NULL))
 141                         {
 142                         ASN1_TYPE_free(a->parameter);
 143                         a->parameter=ASN1_TYPE_new();
 144                         a->parameter->type=V_ASN1_NULL;
 145                         }
 146                 }
 147         else
 148 #ifndef NO_DSA
 149                 if (pkey->type == EVP_PKEY_DSA)
 150                 {
 151                 unsigned char *pp;
 152                 DSA *dsa;
 153
 154                 dsa=pkey->pkey.dsa;
 155                 dsa->write_params=0;
 156                 ASN1_TYPE_free(a->parameter);
 157                 i=i2d_DSAparams(dsa,NULL);
 158                 p=(unsigned char *)Malloc(i);
 159                 pp=p;
 160                 i2d_DSAparams(dsa,&pp);
 161                 a->parameter=ASN1_TYPE_new();
 162                 a->parameter->type=V_ASN1_SEQUENCE;
 163                 a->parameter->value.sequence=ASN1_STRING_new();
 164                 ASN1_STRING_set(a->parameter->value.sequence,p,i);
 165                 Free(p);
 166                 }
 167         else
 168 #endif
 169                 {
 170                 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
 171                 goto err;
 172                 }
 173
 174         if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
 175         if ((s=(unsigned char *)Malloc(i+1)) == NULL) goto err;
 176         p=s;
 177         i2d_PublicKey(pkey,&p);
 178         if (!ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
 179         /* Set number of unused bits to zero */
 180         pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 181         pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 182
 183         Free(s);
 184
 185         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 186         pk->pkey=pkey;
 187
 188         if (*x != NULL)
 189                 X509_PUBKEY_free(*x);
 190
 191         *x=pk;
 192         pk=NULL;
 193
 194         ok=1;
 195 err:
 196         if (pk != NULL) X509_PUBKEY_free(pk);
 197         return(ok);
 198         }
 199
 200 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
 201         {
 202         EVP_PKEY *ret=NULL;
 203         long j;
 204         int type;
 205         unsigned char *p;
 206 #ifndef NO_DSA
 207         X509_ALGOR *a;
 208 #endif
 209
 210         if (key == NULL) goto err;
 211
 212         if (key->pkey != NULL)
 213             {
 214             CRYPTO_add(&key->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 215             return(key->pkey);
 216             }
 217
 218         if (key->public_key == NULL) goto err;
 219
 220         type=OBJ_obj2nid(key->algor->algorithm);
 221         p=key->public_key->data;
 222         j=key->public_key->length;
 223         if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
 224                 {
 225                 X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
 226                 goto err;
 227                 }
 228         ret->save_parameters=0;
 229
 230 #ifndef NO_DSA
 231         a=key->algor;
 232         if (ret->type == EVP_PKEY_DSA)
 233                 {
 234                 if (a->parameter->type == V_ASN1_SEQUENCE)
 235                         {
 236                         ret->pkey.dsa->write_params=0;
 237                         p=a->parameter->value.sequence->data;
 238                         j=a->parameter->value.sequence->length;
 239                         if (!d2i_DSAparams(&ret->pkey.dsa,&p,(long)j))
 240                                 goto err;
 241                         }
 242                 ret->save_parameters=1;
 243                 }
 244 #endif
 245         key->pkey=ret;
 246         CRYPTO_add(&ret->references,1,CRYPTO_LOCK_EVP_PKEY);
 247         return(ret);
 248 err:
 249         if (ret != NULL)
 250                 EVP_PKEY_free(ret);
 251         return(NULL);
 252         }
 253