/*

 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <stdio.h>

#include "internal/cryptlib.h"

#include <openssl/asn1.h>

#ifndef NO_OLD_ASN1

void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, void *x)

{

    unsigned char *b, *p;

    const unsigned char *p2;

    int i;

    char *ret;

    if (x == NULL)

        return NULL;

    i = i2d(x, NULL);

    b = OPENSSL_malloc(i + 10);

    if (b == NULL) {

        ASN1err(ASN1_F_ASN1_DUP, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    p = b;

    i = i2d(x, &p);

    p2 = b;

    ret = d2i(NULL, &p2, i);

    OPENSSL_free(b);

    return ret;

}

#endif

/*

 * ASN1_ITEM version of dup: this follows the model above except we don't

 * need to allocate the buffer. At some point this could be rewritten to

 * directly dup the underlying structure instead of doing and encode and

 * decode.

 */

void *ASN1_item_dup(const ASN1_ITEM *it, void *x)

{

    unsigned char *b = NULL;

    const unsigned char *p;

    long i;

    void *ret;

    if (x == NULL)

        return NULL;

    i = ASN1_item_i2d(x, &b, it);

    if (b == NULL) {

        ASN1err(ASN1_F_ASN1_ITEM_DUP, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    p = b;

    ret = ASN1_item_d2i(NULL, &p, i, it);

    OPENSSL_free(b);

    return ret;

}