Viewing file:  asn_pack.c (1.55 KB) -rw-r--r--
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/*
* Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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) {
ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
return NULL;
}
} else {
octmp = *oct;
}
ASN1_STRING_set0(octmp, NULL, 0);
if ((octmp->length = ASN1_item_i2d(obj, &octmp->data, it)) == 0) {
ERR_raise(ERR_LIB_ASN1, ASN1_R_ENCODE_ERROR);
goto err;
}
if (octmp->data == NULL) {
ERR_raise(ERR_LIB_ASN1, 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)
ERR_raise(ERR_LIB_ASN1, ASN1_R_DECODE_ERROR);
return ret;
}
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