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 "asn1_mac.h"
  62
  63 /*
  64  * ASN1err(ASN1_F_D2I_X509_PUBKEY,ERR_R_ASN1_LENGTH_MISMATCH);
  65  * ASN1err(ASN1_F_X509_PUBKEY_NEW,ERR_R_ASN1_LENGTH_MISMATCH);
  66  */
  67
  68 int i2d_X509_PUBKEY(a,pp)
  69 X509_PUBKEY *a;
  70 unsigned char **pp;
  71         {
  72         M_ASN1_I2D_vars(a);
  73
  74         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
  75         M_ASN1_I2D_len(a->public_key,   i2d_ASN1_BIT_STRING);
  76
  77         M_ASN1_I2D_seq_total();
  78
  79         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
  80         M_ASN1_I2D_put(a->public_key,   i2d_ASN1_BIT_STRING);
  81
  82         M_ASN1_I2D_finish();
  83         }
  84
  85 X509_PUBKEY *d2i_X509_PUBKEY(a,pp,length)
  86 X509_PUBKEY **a;
  87 unsigned char **pp;
  88 long length;
  89         {
  90         M_ASN1_D2I_vars(a,X509_PUBKEY *,X509_PUBKEY_new);
  91
  92         M_ASN1_D2I_Init();
  93         M_ASN1_D2I_start_sequence();
  94         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
  95         M_ASN1_D2I_get(ret->public_key,d2i_ASN1_BIT_STRING);
  96         if (ret->pkey != NULL)
  97                 {
  98                 EVP_PKEY_free(ret->pkey);
  99                 ret->pkey=NULL;
 100                 }
 101         M_ASN1_D2I_Finish(a,X509_PUBKEY_free,ASN1_F_D2I_X509_PUBKEY);
 102         }
 103
 104 X509_PUBKEY *X509_PUBKEY_new()
 105         {
 106         X509_PUBKEY *ret=NULL;
 107         ASN1_CTX c;
 108
 109         M_ASN1_New_Malloc(ret,X509_PUBKEY);
 110         M_ASN1_New(ret->algor,X509_ALGOR_new);
 111         M_ASN1_New(ret->public_key,ASN1_BIT_STRING_new);
 112         ret->pkey=NULL;
 113         return(ret);
 114         M_ASN1_New_Error(ASN1_F_X509_PUBKEY_NEW);
 115         }
 116
 117 void X509_PUBKEY_free(a)
 118 X509_PUBKEY *a;
 119         {
 120         if (a == NULL) return;
 121         X509_ALGOR_free(a->algor);
 122         ASN1_BIT_STRING_free(a->public_key);
 123         if (a->pkey != NULL) EVP_PKEY_free(a->pkey);
 124         Free((char *)a);
 125         }
 126
 127 int X509_PUBKEY_set(x,pkey)
 128 X509_PUBKEY **x;
 129 EVP_PKEY *pkey;
 130         {
 131         int ok=0;
 132         X509_PUBKEY *pk;
 133         X509_ALGOR *a;
 134         ASN1_OBJECT *o;
 135         unsigned char *s,*p;
 136         int i;
 137
 138         if (x == NULL) return(0);
 139
 140         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
 141         a=pk->algor;
 142
 143         /* set the algorithm id */
 144         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
 145         ASN1_OBJECT_free(a->algorithm);
 146         a->algorithm=o;
 147
 148         /* Set the parameter list */
 149         if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
 150                 {
 151                 if ((a->parameter == NULL) ||
 152                         (a->parameter->type != V_ASN1_NULL))
 153                         {
 154                         ASN1_TYPE_free(a->parameter);
 155                         a->parameter=ASN1_TYPE_new();
 156                         a->parameter->type=V_ASN1_NULL;
 157                         }
 158                 }
 159         else
 160 #ifndef NO_DSA
 161                 if (pkey->type == EVP_PKEY_DSA)
 162                 {
 163                 unsigned char *pp;
 164                 DSA *dsa;
 165
 166                 dsa=pkey->pkey.dsa;
 167                 dsa->write_params=0;
 168                 ASN1_TYPE_free(a->parameter);
 169                 i=i2d_DSAparams(dsa,NULL);
 170                 p=(unsigned char *)Malloc(i);
 171                 pp=p;
 172                 i2d_DSAparams(dsa,&pp);
 173                 a->parameter=ASN1_TYPE_new();
 174                 a->parameter->type=V_ASN1_SEQUENCE;
 175                 a->parameter->value.sequence=ASN1_STRING_new();
 176                 ASN1_STRING_set(a->parameter->value.sequence,p,i);
 177                 Free(p);
 178                 }
 179         else
 180 #endif
 181                 {
 182                 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
 183                 goto err;
 184                 }
 185
 186         i=i2d_PublicKey(pkey,NULL);
 187         if ((s=(unsigned char *)Malloc(i+1)) == NULL) goto err;
 188         p=s;
 189         i2d_PublicKey(pkey,&p);
 190         if (!ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
 191         Free(s);
 192
 193         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 194         pk->pkey=pkey;
 195
 196         if (*x != NULL)
 197                 X509_PUBKEY_free(*x);
 198
 199         *x=pk;
 200         pk=NULL;
 201
 202         ok=1;
 203 err:
 204         if (pk != NULL) X509_PUBKEY_free(pk);
 205         return(ok);
 206         }
 207
 208 EVP_PKEY *X509_PUBKEY_get(key)
 209 X509_PUBKEY *key;
 210         {
 211         EVP_PKEY *ret=NULL;
 212         long j;
 213         int type;
 214         unsigned char *p;
 215 #ifndef NO_DSA
 216         X509_ALGOR *a;
 217 #endif
 218
 219         if (key == NULL) goto err;
 220
 221         if (key->pkey != NULL) return(key->pkey);
 222
 223         if (key->public_key == NULL) goto err;
 224
 225         type=OBJ_obj2nid(key->algor->algorithm);
 226         p=key->public_key->data;
 227         j=key->public_key->length;
 228         if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
 229                 {
 230                 X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
 231                 goto err;
 232                 }
 233         ret->save_parameters=0;
 234
 235 #ifndef NO_DSA
 236         a=key->algor;
 237         if (ret->type == EVP_PKEY_DSA)
 238                 {
 239                 if (a->parameter->type == V_ASN1_SEQUENCE)
 240                         {
 241                         ret->pkey.dsa->write_params=0;
 242                         p=a->parameter->value.sequence->data;
 243                         j=a->parameter->value.sequence->length;
 244                         if (!d2i_DSAparams(&ret->pkey.dsa,&p,(long)j))
 245                                 goto err;
 246                         }
 247                 ret->save_parameters=1;
 248                 }
 249 #endif
 250         key->pkey=ret;
 251         return(ret);
 252 err:
 253         if (ret != NULL)
 254                 EVP_PKEY_free(ret);
 255         return(NULL);
 256         }
 257