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(X509_PUBKEY *a, unsigned char **pp)
  69         {
  70         M_ASN1_I2D_vars(a);
  71
  72         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
  73         M_ASN1_I2D_len(a->public_key,   i2d_ASN1_BIT_STRING);
  74
  75         M_ASN1_I2D_seq_total();
  76
  77         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
  78         M_ASN1_I2D_put(a->public_key,   i2d_ASN1_BIT_STRING);
  79
  80         M_ASN1_I2D_finish();
  81         }
  82
  83 X509_PUBKEY *d2i_X509_PUBKEY(X509_PUBKEY **a, unsigned char **pp,
  84              long length)
  85         {
  86         M_ASN1_D2I_vars(a,X509_PUBKEY *,X509_PUBKEY_new);
  87
  88         M_ASN1_D2I_Init();
  89         M_ASN1_D2I_start_sequence();
  90         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
  91         M_ASN1_D2I_get(ret->public_key,d2i_ASN1_BIT_STRING);
  92         if (ret->pkey != NULL)
  93                 {
  94                 EVP_PKEY_free(ret->pkey);
  95                 ret->pkey=NULL;
  96                 }
  97         M_ASN1_D2I_Finish(a,X509_PUBKEY_free,ASN1_F_D2I_X509_PUBKEY);
  98         }
  99
 100 X509_PUBKEY *X509_PUBKEY_new(void)
 101         {
 102         X509_PUBKEY *ret=NULL;
 103         ASN1_CTX c;
 104
 105         M_ASN1_New_Malloc(ret,X509_PUBKEY);
 106         M_ASN1_New(ret->algor,X509_ALGOR_new);
 107         M_ASN1_New(ret->public_key,ASN1_BIT_STRING_new);
 108         ret->pkey=NULL;
 109         return(ret);
 110         M_ASN1_New_Error(ASN1_F_X509_PUBKEY_NEW);
 111         }
 112
 113 void X509_PUBKEY_free(X509_PUBKEY *a)
 114         {
 115         if (a == NULL) return;
 116         X509_ALGOR_free(a->algor);
 117         ASN1_BIT_STRING_free(a->public_key);
 118         if (a->pkey != NULL) EVP_PKEY_free(a->pkey);
 119         Free((char *)a);
 120         }
 121
 122 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
 123         {
 124         int ok=0;
 125         X509_PUBKEY *pk;
 126         X509_ALGOR *a;
 127         ASN1_OBJECT *o;
 128         unsigned char *s,*p;
 129         int i;
 130
 131         if (x == NULL) return(0);
 132
 133         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
 134         a=pk->algor;
 135
 136         /* set the algorithm id */
 137         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
 138         ASN1_OBJECT_free(a->algorithm);
 139         a->algorithm=o;
 140
 141         /* Set the parameter list */
 142         if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
 143                 {
 144                 if ((a->parameter == NULL) ||
 145                         (a->parameter->type != V_ASN1_NULL))
 146                         {
 147                         ASN1_TYPE_free(a->parameter);
 148                         a->parameter=ASN1_TYPE_new();
 149                         a->parameter->type=V_ASN1_NULL;
 150                         }
 151                 }
 152         else
 153 #ifndef NO_DSA
 154                 if (pkey->type == EVP_PKEY_DSA)
 155                 {
 156                 unsigned char *pp;
 157                 DSA *dsa;
 158
 159                 dsa=pkey->pkey.dsa;
 160                 dsa->write_params=0;
 161                 ASN1_TYPE_free(a->parameter);
 162                 i=i2d_DSAparams(dsa,NULL);
 163                 p=(unsigned char *)Malloc(i);
 164                 pp=p;
 165                 i2d_DSAparams(dsa,&pp);
 166                 a->parameter=ASN1_TYPE_new();
 167                 a->parameter->type=V_ASN1_SEQUENCE;
 168                 a->parameter->value.sequence=ASN1_STRING_new();
 169                 ASN1_STRING_set(a->parameter->value.sequence,p,i);
 170                 Free(p);
 171                 }
 172         else
 173 #endif
 174                 {
 175                 X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
 176                 goto err;
 177                 }
 178
 179         if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
 180         if ((s=(unsigned char *)Malloc(i+1)) == NULL) goto err;
 181         p=s;
 182         i2d_PublicKey(pkey,&p);
 183         if (!ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
 184         /* Set number of unused bits to zero */
 185         pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 186         pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 187
 188         Free(s);
 189
 190         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 191         pk->pkey=pkey;
 192
 193         if (*x != NULL)
 194                 X509_PUBKEY_free(*x);
 195
 196         *x=pk;
 197         pk=NULL;
 198
 199         ok=1;
 200 err:
 201         if (pk != NULL) X509_PUBKEY_free(pk);
 202         return(ok);
 203         }
 204
 205 EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
 206         {
 207         EVP_PKEY *ret=NULL;
 208         long j;
 209         int type;
 210         unsigned char *p;
 211 #ifndef NO_DSA
 212         X509_ALGOR *a;
 213 #endif
 214
 215         if (key == NULL) goto err;
 216
 217         if (key->pkey != NULL)
 218             {
 219             CRYPTO_add(&key->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
 220             return(key->pkey);
 221             }
 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         CRYPTO_add(&ret->references,1,CRYPTO_LOCK_EVP_PKEY);
 252         return(ret);
 253 err:
 254         if (ret != NULL)
 255                 EVP_PKEY_free(ret);
 256         return(NULL);
 257         }
 258