crypto/asn1/a_set.c

   1 /* crypto/asn1/a_set.c */
   2 /* Copyright (C) 1995-1997 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 /* ASN1err(ASN1_F_ASN1_TYPE_NEW,ERR_R_MALLOC_FAILURE);
  64  */
  65
  66 int i2d_ASN1_SET(a,pp,func,ex_tag,ex_class)
  67 STACK *a;
  68 unsigned char **pp;
  69 int (*func)();
  70 int ex_tag;
  71 int ex_class;
  72         {
  73         int ret=0,r;
  74         int i;
  75         unsigned char *p;
  76
  77         if (a == NULL) return(0);
  78         for (i=sk_num(a)-1; i>=0; i--)
  79                 ret+=func(sk_value(a,i),NULL);
  80         r=ASN1_object_size(1,ret,ex_tag);
  81         if (pp == NULL) return(r);
  82
  83         p= *pp;
  84         ASN1_put_object(&p,1,ret,ex_tag,ex_class);
  85         for (i=0; i<sk_num(a); i++)
  86                 func(sk_value(a,i),&p);
  87
  88         *pp=p;
  89         return(r);
  90         }
  91
  92 STACK *d2i_ASN1_SET(a,pp,length,func,ex_tag,ex_class)
  93 STACK **a;
  94 unsigned char **pp;
  95 long length;
  96 char *(*func)();
  97 int ex_tag;
  98 int ex_class;
  99         {
 100         ASN1_CTX c;
 101         STACK *ret=NULL;
 102
 103         if ((a == NULL) || ((*a) == NULL))
 104                 { if ((ret=sk_new(NULL)) == NULL) goto err; }
 105         else
 106                 ret=(*a);
 107
 108         c.p= *pp;
 109         c.max=(length == 0)?0:(c.p+length);
 110
 111         c.inf=ASN1_get_object(&c.p,&c.slen,&c.tag,&c.xclass,c.max-c.p);
 112         if (c.inf & 0x80) goto err;
 113         if (ex_class != c.xclass)
 114                 {
 115                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_CLASS);
 116                 goto err;
 117                 }
 118         if (ex_tag != c.tag)
 119                 {
 120                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_TAG);
 121                 goto err;
 122                 }
 123         if ((c.slen+c.p) > c.max)
 124                 {
 125                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_LENGTH_ERROR);
 126                 goto err;
 127                 }
 128         /* check for infinite constructed - it can be as long
 129          * as the amount of data passed to us */
 130         if (c.inf == (V_ASN1_CONSTRUCTED+1))
 131                 c.slen=length+ *pp-c.p;
 132         c.max=c.p+c.slen;
 133
 134         while (c.p < c.max)
 135                 {
 136                 char *s;
 137
 138                 if (M_ASN1_D2I_end_sequence()) break;
 139                 if ((s=func(NULL,&c.p,c.slen,c.max-c.p)) == NULL) goto err;
 140                 if (!sk_push(ret,s)) goto err;
 141                 }
 142         if (a != NULL) (*a)=ret;
 143         *pp=c.p;
 144         return(ret);
 145 err:
 146         if ((ret != NULL) && ((a == NULL) || (*a != ret))) sk_free(ret);
 147         return(NULL);
 148         }
 149