crypto/asn1/d2i_s_pu.c

   1 /* crypto/asn1/d2i_s_pu.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 /* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
  60
  61 #ifndef NO_DSA
  62 #include <stdio.h>
  63 #include "cryptlib.h"
  64 #include <openssl/bn.h>
  65 #include <openssl/dsa.h>
  66 #include <openssl/objects.h>
  67 #include <openssl/asn1_mac.h>
  68
  69 DSA *d2i_DSAPublicKey(DSA **a, unsigned char **pp, long length)
  70         {
  71         int i=ASN1_R_PARSING;
  72         ASN1_INTEGER *bs=NULL;
  73         M_ASN1_D2I_vars(a,DSA *,DSA_new);
  74
  75         M_ASN1_D2I_Init();
  76         if ((length != 0) && ((M_ASN1_next & (~V_ASN1_CONSTRUCTED))
  77                 == (V_ASN1_UNIVERSAL|(V_ASN1_INTEGER))))
  78                 {
  79                 c.slen=length;
  80                 M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
  81                 if ((ret->pub_key=BN_bin2bn(bs->data,bs->length,ret->pub_key))
  82                         == NULL)
  83                         goto err_bn;
  84                 ret->write_params=0;
  85                 }
  86         else
  87                 {
  88                 M_ASN1_D2I_start_sequence();
  89                 M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
  90                 if ((ret->pub_key=BN_bin2bn(bs->data,bs->length,ret->pub_key))
  91                         == NULL)
  92                         goto err_bn;
  93                 M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
  94                 if ((ret->p=BN_bin2bn(bs->data,bs->length,ret->p)) == NULL)
  95                         goto err_bn;
  96                 M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
  97                 if ((ret->q=BN_bin2bn(bs->data,bs->length,ret->q)) == NULL)
  98                         goto err_bn;
  99                 M_ASN1_D2I_get(bs,d2i_ASN1_INTEGER);
 100                 if ((ret->g=BN_bin2bn(bs->data,bs->length,ret->g)) == NULL)
 101                         goto err_bn;
 102
 103                 ret->write_params=1;
 104                 }
 105
 106         ASN1_INTEGER_free(bs);
 107         bs=NULL;
 108         M_ASN1_D2I_Finish_2(a);
 109 err_bn:
 110         i=ERR_R_BN_LIB;
 111 err:
 112         ASN1err(ASN1_F_D2I_DSAPUBLICKEY,i);
 113         if ((ret != NULL) && ((a == NULL) || (*a != ret))) DSA_free(ret);
 114         if (bs != NULL) ASN1_INTEGER_free(bs);
 115         return(NULL);
 116         }
 117 #endif