/*

 * Copyright 1995-2017 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 "internal/cryptlib.h"

#include <openssl/bn.h>

#include <openssl/rsa.h>

int RSA_padding_add_none(unsigned char *to, int tlen,

                         const unsigned char *from, int flen)

{

    if (flen > tlen) {

        RSAerr(RSA_F_RSA_PADDING_ADD_NONE, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);

        return 0;

    }

    if (flen < tlen) {

        RSAerr(RSA_F_RSA_PADDING_ADD_NONE, RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE);

        return 0;

    }

    memcpy(to, from, (unsigned int)flen);

    return 1;

}

int RSA_padding_check_none(unsigned char *to, int tlen,

                           const unsigned char *from, int flen, int num)

{

    if (flen > tlen) {

        RSAerr(RSA_F_RSA_PADDING_CHECK_NONE, RSA_R_DATA_TOO_LARGE);

        return -1;

    }

    memset(to, 0, tlen - flen);

    memcpy(to + tlen - flen, from, flen);

    return tlen;

}