crypto/asn1/evp_asn1.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include "internal/cryptlib.h"
  60 #include <openssl/asn1.h>
  61 #include <openssl/asn1t.h>
  62
  63 int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)
  64 {
  65     ASN1_STRING *os;
  66
  67     if ((os = ASN1_OCTET_STRING_new()) == NULL)
  68         return (0);
  69     if (!ASN1_OCTET_STRING_set(os, data, len)) {
  70         ASN1_OCTET_STRING_free(os);
  71         return 0;
  72     }
  73     ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os);
  74     return (1);
  75 }
  76
  77 /* int max_len:  for returned value    */
  78 int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, int max_len)
  79 {
  80     int ret, num;
  81     unsigned char *p;
  82
  83     if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) {
  84         ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING, ASN1_R_DATA_IS_WRONG);
  85         return (-1);
  86     }
  87     p = ASN1_STRING_data(a->value.octet_string);
  88     ret = ASN1_STRING_length(a->value.octet_string);
  89     if (ret < max_len)
  90         num = ret;
  91     else
  92         num = max_len;
  93     memcpy(data, p, num);
  94     return (ret);
  95 }
  96
  97 typedef struct {
  98     long num;
  99     ASN1_OCTET_STRING *oct;
 100 } asn1_int_oct;
 101
 102 ASN1_SEQUENCE(asn1_int_oct) = {
 103         ASN1_SIMPLE(asn1_int_oct, num, LONG),
 104         ASN1_SIMPLE(asn1_int_oct, oct, ASN1_OCTET_STRING)
 105 } static_ASN1_SEQUENCE_END(asn1_int_oct)
 106
 107 DECLARE_ASN1_ITEM(asn1_int_oct)
 108
 109 int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
 110                                   int len)
 111 {
 112     asn1_int_oct atmp;
 113     ASN1_OCTET_STRING oct;
 114
 115     atmp.num = num;
 116     atmp.oct = &oct;
 117     oct.data = data;
 118     oct.type = V_ASN1_OCTET_STRING;
 119     oct.length = len;
 120     oct.flags = 0;
 121
 122     if (ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(asn1_int_oct), &atmp, &a))
 123         return 1;
 124     return 0;
 125 }
 126
 127 /*
 128  * we return the actual length...
 129  */
 130 /* int max_len:  for returned value    */
 131 int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num,
 132                                   unsigned char *data, int max_len)
 133 {
 134     asn1_int_oct *atmp = NULL;
 135     int ret = -1, n;
 136
 137     if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) {
 138         goto err;
 139     }
 140
 141     atmp = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(asn1_int_oct), a);
 142
 143     if (atmp == NULL)
 144         goto err;
 145
 146     if (num != NULL)
 147         *num = atmp->num;
 148
 149     ret = ASN1_STRING_length(atmp->oct);
 150     if (max_len > ret)
 151         n = ret;
 152     else
 153         n = max_len;
 154
 155     if (data != NULL)
 156         memcpy(data, ASN1_STRING_data(atmp->oct), n);
 157     if (ret == -1) {
 158  err:
 159         ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING, ASN1_R_DATA_IS_WRONG);
 160     }
 161     M_ASN1_free_of(atmp, asn1_int_oct);
 162     return ret;
 163 }