/*
?*??FIPS-197?compliant?AES?implementation
?*
?*??Copyright?（C）?2006-2015?ARM?Limited?All?Rights?Reserved
?*??SPDX-License-Identifier:?Apache-2.0
?*
?*??Licensed?under?the?Apache?License?Version?2.0?（the?“License“）;?you?may
?*??not?use?this?file?except?in?compliance?with?the?License.
?*??You?may?obtain?a?copy?of?the?License?at
?*
?*??http://www.apache.org/licenses/LICENSE-2.0
?*
?*??Unless?required?by?applicable?law?or?agreed?to?in?writing?software
?*??distributed?under?the?License?is?distributed?on?an?“AS?IS“?BASIS?WITHOUT
?*??WARRANTIES?OR?CONDITIONS?OF?ANY?KIND?either?express?or?implied.
?*??See?the?License?for?the?specific?language?governing?permissions?and
?*??limitations?under?the?License.
?*
?*??This?file?is?part?of?mbed?TLS?（https://tls.mbed.org）
?*/
/*
?*??The?AES?block?cipher?was?designed?by?Vincent?Rijmen?and?Joan?Daemen.
?*
?*??http://csrc.nist.gov/encryption/aes/rijndael/Rijndael.pdf
?*??http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
?*/

#if?!defined（MBEDTLS_CONFIG_FILE）
//#include?“config.h“
#else
#include?MBEDTLS_CONFIG_FILE
#endif

#include?
#include?
#include?

#include?“aes.h“

#if?!defined（MBEDTLS_AES_ALT）

/*?Implementation?that?should?never?be?optimized?out?by?the?compiler?*/
static?void?mbedtls_zeroize（?void?*v?size_t?n?）?{
????volatile?unsigned?char?*p?=?（unsigned?char*）v;?while（?n--?）?*p++?=?0;
}

/*?Add?base64?and?padding?By?zhanggf?start?1?*/
#ifndef?base64
static?const?char?*ALPHA_base?=?“ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/“;

unsigned?char*?str2hex（char?*str）?{
????unsigned?char?*ret?=?NULL;
????int?str_len?=?strlen（str）;
????int?i?=?0;

????ret?=?（char?*）malloc（str_len/2）;
	memset（ret?0?str_len/2）;
????for?（i?=0;i?????????sscanf（str+i“%2hhx“&ret[i/2]）;
????}
????return?ret;
}

int?AES_padding7_buf（char?*pszBufint?iSize?char?*pszOutbuf?int?iOutbufLen）?{
	int??iFinalSize?=?-1;
????int?pidding_size?=?AES_BLOCK_SIZE?-?（iSize?%?AES_BLOCK_SIZE）;
????int?i;
?
	if?（iOutbufLen?==?0）?{
		return?iFinalSize;
	}

????iFinalSize?=?iSize?+?pidding_size;
	memset（pszOutbuf?0?iOutbufLen）;
????memcpy（pszOutbuf?pszBuf?iSize）;
????if?（pidding_size!=0）?{
????????for?（i?=?iSize;i?????????????pszOutbuf[i]?=?pidding_size;
????????}
????}
	
????return?iFinalSize;
}

int?AES_padding0_buf（char?*pszBufint?iSize?char?*pszOutbuf?int?iOutbufLen）?{
	int??iFinalSize?=?-1;
????int?pidding_size?=?AES_BLOCK_SIZE?-?（iSize?%?AES_BLOCK_SIZE）;
????int?i;
?
	if?（iOutbufLen?==?0）?{
		return?iFinalSize;
	}

????iFinalSize?=?iSize?+?pidding_size;
	memset（pszOutbuf?0?iOutbufLen）;
????memcpy（pszOutbuf?pszBuf?iSize）;
????if?（pidding_size!=0）?{
????????for?（i?=?iSize;i?????????????pszOutbuf[i]?=?0;
????????}
????}
	
????return?iFinalSize;
}
?
void?AES_printf_hex（char?*pszBuf?int?iBufLen）
{
	int?iLoop?=?0;
	
	for?（;?iLoop?		printf（“%02x“?（unsigned?char）ps