/*
 * Copyright 2008 Freescale Semiconductor, Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <config.h>

#include <openssl/sha.h>
#include <openssl/rsa.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/bn.h>
#include <openssl/pem.h>

#include "../fs/aw_fs/ff.h"

extern RSA *PEM_read_RSA_PUBKEY(FILE *fp, RSA **x, void *cb, void *u);
/*
************************************************************************************************************
*
*                                             function
*
*    name          :
*
*    parmeters     :
*
*    return        :
*
*    note          :
*
*
************************************************************************************************************
*/
int sunxi_rsa_publickey_decrypt(char *source_str, char *decryped_data, int data_bytes, char *key_path)
{
    RSA *p_rsa;
    FILE file;
    int rsa_len, ret = -1;

	printf("sunxi_rsa_publickey_decrypt key name=%s\n", key_path);

	ret = f_open (&file, key_path, FA_OPEN_EXISTING | FA_READ );
    if(ret)
    {
        printf("open key file error\n");

        return -1;
    }
    if((p_rsa=PEM_read_RSA_PUBKEY(&file,NULL,NULL,NULL))==NULL)
    {
        printf("unable to get public key\n");

        goto __sunxi_rsa_publickey_decrypt_err;
    }

    rsa_len=RSA_size(p_rsa);

    if(RSA_public_decrypt(rsa_len,(unsigned char *)source_str, (unsigned char*)decryped_data, p_rsa, RSA_NO_PADDING)<0)
    {
        goto __sunxi_rsa_publickey_decrypt_err;
    }
    ret = 0;

__sunxi_rsa_publickey_decrypt_err:
	f_close(&file);

	if(p_rsa != NULL)
		RSA_free(p_rsa);

    return ret;
}
/*
************************************************************************************************************
*
*                                             function
*
*    name          :
*
*    parmeters     :
*
*    return        :
*
*    note          :
*
*
************************************************************************************************************
*/
//char *sunxi_rsa_privatekey_encrypt(char *source_str, char *encryped_data, int data_bytes, char *key_path)
//{
//    RSA *p_rsa;
//    FILE file;
//    int rsa_len, ret;
//    FATFS openssl_mount;
//
//	printf("sunxi_rsa_encrypt key name=%s\n", key_path);
//
//	f_mount(0, &openssl_mount, "bootloader");
//	ret = f_open (&file, key_path, FA_OPEN_EXISTING | FA_READ );
//    if(ret)
//    {
//        printf("open key file error\n");
//
//        return NULL;
//    }
//    if((p_rsa=PEM_read_RSAPrivateKey(&file,NULL,NULL,NULL))==NULL)
//    {
//        printf("unable to get private key\n");
//
//        goto __sunxi_rsa_privatekey_encrypt_err;
//    }
//
//	rsa_len=RSA_size(p_rsa);
//	ret = RSA_private_encrypt(rsa_len, (unsigned char *)source_str,(unsigned char*)encryped_data, p_rsa, RSA_NO_PADDING);
//    if(ret)
//    {
//        goto __sunxi_rsa_privatekey_encrypt_err;
//    }
//
//__sunxi_rsa_privatekey_encrypt_err:
//	f_close(&file);
//	f_mount(0, NULL, NULL);
//
//	if(p_rsa != NULL)
//		RSA_free(p_rsa);
//
//    return 0;
//}
///*
//************************************************************************************************************
//*
//*                                             function
//*
//*    name          :
//*
//*    parmeters     :
//*
//*    return        :
//*
//*    note          :
//*
//*
//************************************************************************************************************
//*/
//int sha256(char *source_str, int str_len, char *sha256_value)
//{
//	SHA256_CTX	ctx;
//  	char   data_default[128];
//	char  *data;
//	const  char *info = "Testing SHA-256";
//	uint   size;
//
//    memset(sha256_value, 0, SHA256_DIGEST_LENGTH);
//
//    SHA256_Init(&ctx);
//    SHA256_Update(&ctx, (u_int8_t *)source_str, str_len);
//    SHA256_Final(sha256_value, &ctx);
//
//	dump(sha256, 256 + 32);
//
//	arm_neon_init();
//
//	return 0;
//}