release/src/router/openssl/crypto/asn1/asn_pack.c

   1 /* asn_pack.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 1999.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61 #include "cryptlib.h"
  62 #include <openssl/asn1.h>
  63
  64 #ifndef NO_ASN1_OLD
  65
  66 /* ASN1 packing and unpacking functions */
  67
  68 /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */
  69
  70 STACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len,
  71                                          d2i_of_void *d2i,
  72                                          void (*free_func) (OPENSSL_BLOCK))
  73 {
  74     STACK_OF(OPENSSL_BLOCK) *sk;
  75     const unsigned char *pbuf;
  76     pbuf = buf;
  77     if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func,
  78                             V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL)))
  79         ASN1err(ASN1_F_ASN1_SEQ_UNPACK, ASN1_R_DECODE_ERROR);
  80     return sk;
  81 }
  82
  83 /*
  84  * Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a
  85  * OPENSSL_malloc'ed buffer
  86  */
  87
  88 unsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d,
  89                              unsigned char **buf, int *len)
  90 {
  91     int safelen;
  92     unsigned char *safe, *p;
  93     if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE,
  94                                  V_ASN1_UNIVERSAL, IS_SEQUENCE))) {
  95         ASN1err(ASN1_F_ASN1_SEQ_PACK, ASN1_R_ENCODE_ERROR);
  96         return NULL;
  97     }
  98     if (!(safe = OPENSSL_malloc(safelen))) {
  99         ASN1err(ASN1_F_ASN1_SEQ_PACK, ERR_R_MALLOC_FAILURE);
 100         return NULL;
 101     }
 102     p = safe;
 103     i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
 104                  IS_SEQUENCE);
 105     if (len)
 106         *len = safelen;
 107     if (buf)
 108         *buf = safe;
 109     return safe;
 110 }
 111
 112 /* Extract an ASN1 object from an ASN1_STRING */
 113
 114 void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i)
 115 {
 116     const unsigned char *p;
 117     char *ret;
 118
 119     p = oct->data;
 120     if (!(ret = d2i(NULL, &p, oct->length)))
 121         ASN1err(ASN1_F_ASN1_UNPACK_STRING, ASN1_R_DECODE_ERROR);
 122     return ret;
 123 }
 124
 125 /* Pack an ASN1 object into an ASN1_STRING */
 126
 127 ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct)
 128 {
 129     unsigned char *p;
 130     ASN1_STRING *octmp;
 131
 132     if (!oct || !*oct) {
 133         if (!(octmp = ASN1_STRING_new())) {
 134             ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE);
 135             return NULL;
 136         }
 137         if (oct)
 138             *oct = octmp;
 139     } else
 140         octmp = *oct;
 141
 142     if (!(octmp->length = i2d(obj, NULL))) {
 143         ASN1err(ASN1_F_ASN1_PACK_STRING, ASN1_R_ENCODE_ERROR);
 144         goto err;
 145     }
 146     if (!(p = OPENSSL_malloc(octmp->length))) {
 147         ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE);
 148         goto err;
 149     }
 150     octmp->data = p;
 151     i2d(obj, &p);
 152     return octmp;
 153  err:
 154     if (!oct || !*oct) {
 155         ASN1_STRING_free(octmp);
 156         if (oct)
 157             *oct = NULL;
 158     }
 159     return NULL;
 160 }
 161
 162 #endif
 163
 164 /* ASN1_ITEM versions of the above */
 165
 166 ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
 167 {
 168     ASN1_STRING *octmp;
 169
 170     if (!oct || !*oct) {
 171         if (!(octmp = ASN1_STRING_new())) {
 172             ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
 173             return NULL;
 174         }
 175         if (oct)
 176             *oct = octmp;
 177     } else
 178         octmp = *oct;
 179
 180     if (octmp->data) {
 181         OPENSSL_free(octmp->data);
 182         octmp->data = NULL;
 183     }
 184
 185     if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
 186         ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR);
 187         return NULL;
 188     }
 189     if (!octmp->data) {
 190         ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
 191         return NULL;
 192     }
 193     return octmp;
 194 }
 195
 196 /* Extract an ASN1 object from an ASN1_STRING */
 197
 198 void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
 199 {
 200     const unsigned char *p;
 201     void *ret;
 202
 203     p = oct->data;
 204     if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
 205         ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR);
 206     return ret;
 207 }