/*
 * Copyright (c) 2022-2024, ArtInChip Technology Co., Ltd
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Authors: Xiong Hao <hao.xiong@artinchip.com>
 */

#ifndef _RSA_PAD_H_
#define _RSA_PAD_H_

#define RSA_PKCS1_PADDING 1
#define RSA_NO_PADDING    2

#define RSA_PKCS1_PADDING_SIZE 11

/*
 * Reference openssl-1.1.1m rsa_pk1.c code and "RFC8017 : PKCS #1: RSA
 * Cryptography Specifications Version 2.2" implementation.
 */
int rsa_padding_add_pkcs1_type_1(unsigned char *to, int tlen,
                                 const unsigned char *from, int flen);
int rsa_padding_check_pkcs1_type_1(unsigned char *to, int tlen,
                                   const unsigned char *from, int flen,
                                   int num);
/*
 * PKCS#1 v1.5 encryption. See "RFC8017: PKCS #1: RSA Cryptography
 * Specifications Version 2.2" section 7.2.1.,
 */
int rsa_padding_add_pkcs1_type_2(unsigned char *to, int tlen,
                                 const unsigned char *from, int flen);
/*
 * PKCS#1 v1.5 decryption. See "RFC8017: PKCS #1: RSA Cryptography
 * Specifications Version 2.2" section 7.2.2.,
 */
int rsa_padding_check_pkcs1_type_2(unsigned char *to, int tlen,
                                   const unsigned char *from, int flen,
                                   int num);
int rsa_padding_add_none(unsigned char *to, int tlen, const unsigned char *from,
                         int flen);
int rsa_padding_check_none(unsigned char *to, int tlen,
                           const unsigned char *from, int flen, int num);

#endif