crypto/openssl-0.9.7e/crypto/asn1/evp_asn1.c

   1 /* crypto/asn1/evp_asn1.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.h>
  62 #include <openssl/asn1_mac.h>
  63
  64 int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)
  65         {
  66         ASN1_STRING *os;
  67
  68         if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0);
  69         if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0);
  70         ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);
  71         return(1);
  72         }
  73
  74 /* int max_len:  for returned value    */
  75 int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data,
  76              int max_len)
  77         {
  78         int ret,num;
  79         unsigned char *p;
  80
  81         if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL))
  82                 {
  83                 ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
  84                 return(-1);
  85                 }
  86         p=M_ASN1_STRING_data(a->value.octet_string);
  87         ret=M_ASN1_STRING_length(a->value.octet_string);
  88         if (ret < max_len)
  89                 num=ret;
  90         else
  91                 num=max_len;
  92         memcpy(data,p,num);
  93         return(ret);
  94         }
  95
  96 int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
  97              int len)
  98         {
  99         int n,size;
 100         ASN1_OCTET_STRING os,*osp;
 101         ASN1_INTEGER in;
 102         unsigned char *p;
 103         unsigned char buf[32]; /* when they have 256bit longs,
 104                                 * I'll be in trouble */
 105         in.data=buf;
 106         in.length=32;
 107         os.data=data;
 108         os.type=V_ASN1_OCTET_STRING;
 109         os.length=len;
 110         ASN1_INTEGER_set(&in,num);
 111         n =  i2d_ASN1_INTEGER(&in,NULL);
 112         n+=M_i2d_ASN1_OCTET_STRING(&os,NULL);
 113
 114         size=ASN1_object_size(1,n,V_ASN1_SEQUENCE);
 115
 116         if ((osp=ASN1_STRING_new()) == NULL) return(0);
 117         /* Grow the 'string' */
 118         ASN1_STRING_set(osp,NULL,size);
 119
 120         M_ASN1_STRING_length_set(osp, size);
 121         p=M_ASN1_STRING_data(osp);
 122
 123         ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 124           i2d_ASN1_INTEGER(&in,&p);
 125         M_i2d_ASN1_OCTET_STRING(&os,&p);
 126
 127         ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp);
 128         return(1);
 129         }
 130
 131 /* we return the actual length..., num may be missing, in which
 132  * case, set it to zero */
 133 /* int max_len:  for returned value    */
 134 int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,
 135              int max_len)
 136         {
 137         int ret= -1,n;
 138         ASN1_INTEGER *ai=NULL;
 139         ASN1_OCTET_STRING *os=NULL;
 140         unsigned char *p;
 141         long length;
 142         ASN1_CTX c;
 143
 144         if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))
 145                 {
 146                 goto err;
 147                 }
 148         p=M_ASN1_STRING_data(a->value.sequence);
 149         length=M_ASN1_STRING_length(a->value.sequence);
 150
 151         c.pp= &p;
 152         c.p=p;
 153         c.max=p+length;
 154         c.error=ASN1_R_DATA_IS_WRONG;
 155
 156         M_ASN1_D2I_start_sequence();
 157         c.q=c.p;
 158         if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err;
 159         c.slen-=(c.p-c.q);
 160         c.q=c.p;
 161         if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err;
 162         c.slen-=(c.p-c.q);
 163         if (!M_ASN1_D2I_end_sequence()) goto err;
 164
 165         if (num != NULL)
 166                 *num=ASN1_INTEGER_get(ai);
 167
 168         ret=M_ASN1_STRING_length(os);
 169         if (max_len > ret)
 170                 n=ret;
 171         else
 172                 n=max_len;
 173
 174         if (data != NULL)
 175                 memcpy(data,M_ASN1_STRING_data(os),n);
 176         if (0)
 177                 {
 178 err:
 179                 ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
 180                 }
 181         if (os != NULL) M_ASN1_OCTET_STRING_free(os);
 182         if (ai != NULL) M_ASN1_INTEGER_free(ai);
 183         return(ret);
 184         }
 185