/*

 * 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>

#include <openssl/asn1t.h>

int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)

{

    ASN1_STRING *os;

    if ((os = ASN1_OCTET_STRING_new()) == NULL)

        return 0;

    if (!ASN1_OCTET_STRING_set(os, data, len)) {

        ASN1_OCTET_STRING_free(os);

        return 0;

    }

    ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os);

    return 1;

}

/* int max_len:  for returned value    */

int ASN1_TYPE_get_octetstring(const ASN1_TYPE *a, unsigned char *data, int max_len)

{

    int ret, num;

    const unsigned char *p;

    if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) {

        ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING, ASN1_R_DATA_IS_WRONG);

        return -1;

    }

    p = ASN1_STRING_get0_data(a->value.octet_string);

    ret = ASN1_STRING_length(a->value.octet_string);

    if (ret < max_len)

        num = ret;

    else

        num = max_len;

    memcpy(data, p, num);

    return ret;

}

typedef struct {

    int32_t num;

    ASN1_OCTET_STRING *oct;

} asn1_int_oct;

ASN1_SEQUENCE(asn1_int_oct) = {

        ASN1_EMBED(asn1_int_oct, num, INT32),

        ASN1_SIMPLE(asn1_int_oct, oct, ASN1_OCTET_STRING)

} static_ASN1_SEQUENCE_END(asn1_int_oct)

DECLARE_ASN1_ITEM(asn1_int_oct)

int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,

                                  int len)

{

    asn1_int_oct atmp;

    ASN1_OCTET_STRING oct;

    atmp.num = num;

    atmp.oct = &oct;

    oct.data = data;

    oct.type = V_ASN1_OCTET_STRING;

    oct.length = len;

    oct.flags = 0;

    if (ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(asn1_int_oct), &atmp, &a))

        return 1;

    return 0;

}

/*

 * we return the actual length...

 */

/* int max_len:  for returned value    */

int ASN1_TYPE_get_int_octetstring(const ASN1_TYPE *a, long *num,

                                  unsigned char *data, int max_len)

{

    asn1_int_oct *atmp = NULL;

    int ret = -1, n;

    if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) {

        goto err;

    }

    atmp = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(asn1_int_oct), a);

    if (atmp == NULL)

        goto err;

    if (num != NULL)

        *num = atmp->num;

    ret = ASN1_STRING_length(atmp->oct);

    if (max_len > ret)

        n = ret;

    else

        n = max_len;

    if (data != NULL)

        memcpy(data, ASN1_STRING_get0_data(atmp->oct), n);

    if (ret == -1) {

 err:

        ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING, ASN1_R_DATA_IS_WRONG);

    }

    M_ASN1_free_of(atmp, asn1_int_oct);

    return ret;

}