/*

 * Copyright 1999-2016 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>

/* ASN1 packing and unpacking functions */

ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)

{

    ASN1_STRING *octmp;

     if (oct == NULL || *oct == NULL) {

        if ((octmp = ASN1_STRING_new()) == NULL) {

            ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);

            return NULL;

        }

    } else {

        octmp = *oct;

    }

    OPENSSL_free(octmp->data);

    octmp->data = NULL;

    if ((octmp->length = ASN1_item_i2d(obj, &octmp->data, it)) == 0) {

        ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR);

        goto err;

    }

    if (octmp->data == NULL) {

        ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    if (oct != NULL && *oct == NULL)

        *oct = octmp;

    return octmp;

 err:

    if (oct == NULL || *oct == NULL)

        ASN1_STRING_free(octmp);

    return NULL;

}

/* Extract an ASN1 object from an ASN1_STRING */

void *ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it)

{

    const unsigned char *p;

    void *ret;

    p = oct->data;

    if ((ret = ASN1_item_d2i(NULL, &p, oct->length, it)) == NULL)

        ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR);

    return ret;

}