/*

 * Copyright 1995-2021 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/buffer.h>

#include <openssl/asn1.h>

#ifndef NO_OLD_ASN1

# ifndef OPENSSL_NO_STDIO

int ASN1_i2d_fp(i2d_of_void *i2d, FILE *out, const void *x)

{

    BIO *b;

    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {

        ERR_raise(ERR_LIB_ASN1, ERR_R_BUF_LIB);

        return 0;

    }

    BIO_set_fp(b, out, BIO_NOCLOSE);

    ret = ASN1_i2d_bio(i2d, b, x);

    BIO_free(b);

    return ret;

}

# endif

int ASN1_i2d_bio(i2d_of_void *i2d, BIO *out, const void *x)

{

    char *b;

    unsigned char *p;

    int i, j = 0, n, ret = 1;

    n = i2d(x, NULL);

    if (n <= 0)

        return 0;

    b = OPENSSL_malloc(n);

    if (b == NULL)

        return 0;

    p = (unsigned char *)b;

    i2d(x, &p);

    for (;;) {

        i = BIO_write(out, &(b[j]), n);

        if (i == n)

            break;

        if (i <= 0) {

            ret = 0;

            break;

        }

        j += i;

        n -= i;

    }

    OPENSSL_free(b);

    return ret;

}

#endif

#ifndef OPENSSL_NO_STDIO

int ASN1_item_i2d_fp(const ASN1_ITEM *it, FILE *out, const void *x)

{

    BIO *b;

    int ret;

    if ((b = BIO_new(BIO_s_file())) == NULL) {

        ERR_raise(ERR_LIB_ASN1, ERR_R_BUF_LIB);

        return 0;

    }

    BIO_set_fp(b, out, BIO_NOCLOSE);

    ret = ASN1_item_i2d_bio(it, b, x);

    BIO_free(b);

    return ret;

}

#endif

int ASN1_item_i2d_bio(const ASN1_ITEM *it, BIO *out, const void *x)

{

    unsigned char *b = NULL;

    int i, j = 0, n, ret = 1;

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

    if (b == NULL) {

        ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);

        return 0;

    }

    for (;;) {

        i = BIO_write(out, &(b[j]), n);

        if (i == n)

            break;

        if (i <= 0) {

            ret = 0;

            break;

        }

        j += i;

        n -= i;

    }

    OPENSSL_free(b);

    return ret;

}

BIO *ASN1_item_i2d_mem_bio(const ASN1_ITEM *it, const ASN1_VALUE *val)

{

    BIO *res;

    if (it == NULL || val == NULL) {

        ERR_raise(ERR_LIB_ASN1, ERR_R_PASSED_NULL_PARAMETER);

        return NULL;

    }

    if ((res = BIO_new(BIO_s_mem())) == NULL)

        return NULL;

    if (ASN1_item_i2d_bio(it, res, val) <= 0) {

        BIO_free(res);

        res = NULL;

    }

    return res;

}