crypto/asn1/a_dup.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
  62 #ifndef NO_OLD_ASN1
  63
  64 void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, void *x)
  65 {
  66     unsigned char *b, *p;
  67     const unsigned char *p2;
  68     int i;
  69     char *ret;
  70
  71     if (x == NULL)
  72         return (NULL);
  73
  74     i = i2d(x, NULL);
  75     b = OPENSSL_malloc(i + 10);
  76     if (b == NULL) {
  77         ASN1err(ASN1_F_ASN1_DUP, ERR_R_MALLOC_FAILURE);
  78         return (NULL);
  79     }
  80     p = b;
  81     i = i2d(x, &p);
  82     p2 = b;
  83     ret = d2i(NULL, &p2, i);
  84     OPENSSL_free(b);
  85     return (ret);
  86 }
  87
  88 #endif
  89
  90 /*
  91  * ASN1_ITEM version of dup: this follows the model above except we don't
  92  * need to allocate the buffer. At some point this could be rewritten to
  93  * directly dup the underlying structure instead of doing and encode and
  94  * decode.
  95  */
  96
  97 void *ASN1_item_dup(const ASN1_ITEM *it, void *x)
  98 {
  99     unsigned char *b = NULL;
 100     const unsigned char *p;
 101     long i;
 102     void *ret;
 103
 104     if (x == NULL)
 105         return (NULL);
 106
 107     i = ASN1_item_i2d(x, &b, it);
 108     if (b == NULL) {
 109         ASN1err(ASN1_F_ASN1_ITEM_DUP, ERR_R_MALLOC_FAILURE);
 110         return (NULL);
 111     }
 112     p = b;
 113     ret = ASN1_item_d2i(NULL, &p, i, it);
 114     OPENSSL_free(b);
 115     return (ret);
 116 }