rt-thread/bsp/essemi/es8p508x/libraries/Library/Source/lib_aes.c

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/***************************************************************
*Copyright (C), 2017, Shanghai Eastsoft Microelectronics Co., Ltd.
*文件名:
*作 者: AE
*版 本: V1.00
*日 期: 2017/07/14
*描 述:
*备 注: 适用于 ES8P508芯片
本软件仅供学习和演示使用,对用户直接引用代码所带来的风险或后果不承担任何法律责任。
***************************************************************/
#include "lib_aes.h"
/***************************************************************
函数名AES_Init
描 述AES功能初始化函数
输入值AES_InitStruct 初始化结构体
输出值:无
返回值:无
***************************************************************/
void AES_Init(AES_InitStruType * AES_InitStruct)
{
AES_Reset();
AES->CON.ENCRYPT = AES_InitStruct->MODE;
return;
}
/***************************************************************
函数名AES_WriteKey
描 述AES写入密钥函数
输入值AES_KEY 待写入密钥
输出值:无
返回值:无
***************************************************************/
void AES_WriteKey(uint32_t *AES_KEY)
{
uint32_t *address = AES_KEY;
AES->KEY3.AES_KEY3 = *address;
address ++;
AES->KEY2.AES_KEY2 = *address;
address ++;
AES->KEY1.AES_KEY1 = *address;
address ++;
AES->KEY0.AES_KEY0 = *address;
}
/***************************************************************
函数名AES_ReadKey
描 述AES读出密钥函数
输入值:无
输出值AES_DATA读出密钥存放位置
返回值:无
***************************************************************/
void AES_ReadKey(uint32_t * AES_KEY)
{
uint32_t *address = AES_KEY;
*address = AES->KEY3.AES_KEY3;
address ++;
*address = AES->KEY2.AES_KEY2;
address ++;
*address = AES->KEY1.AES_KEY1;
address ++;
*address = AES->KEY0.AES_KEY0;
return;
}
/***************************************************************
函数名AES_WriteData
描 述AES写入数据函数
输入值AES_DATA 待写入数据
输出值:无
返回值:无
***************************************************************/
void AES_WriteData(uint32_t *AES_DATA)
{
uint32_t *address = AES_DATA;
AES->DATA3.AES_DATA3 = *address;
address ++;
AES->DATA2.AES_DATA2 = *address;
address ++;
AES->DATA1.AES_DATA1 = *address;
address ++;
AES->DATA0.AES_DATA0 = *address;
}
/***************************************************************
函数名AES_WriteData
描 述AES读出数据函数
输入值:无
输出值AES_DATA读出数据存放位置
返回值:无
***************************************************************/
void AES_ReadData(uint32_t * AES_DATA)
{
uint32_t *address = AES_DATA;
*address = AES->DATA3.AES_DATA3;
address ++;
*address = AES->DATA2.AES_DATA2;
address ++;
*address = AES->DATA1.AES_DATA1;
address ++;
*address = AES->DATA0.AES_DATA0;
return;
}
/***************************************************************
函数名AES_ITConfig
描 述AES中断使能
输入值AES_IE
NewState Enable/Disable
输出值:无
返回值:无
***************************************************************/
void AES_ITConfig(AES_TYPE_IT AES_IE, TYPE_FUNCEN NewState)
{
uint32_t Word = AES->CON.Word&0xffffff8e;
if(AES->CON.GO_DONE == 1)
{
return;
}
if (NewState == ENABLE)
Word |= (uint32_t)AES_IE;
else
Word &= ~(uint32_t)AES_IE;
AES->CON.Word = Word;
return;
}
/***************************************************************
函数名AES_GetFlagStatus
描 述AES获得特定中断标志函数
输入值IFName
AES_IF_IF 加解密完成中断
输出值:无
返回值:中断标志与否
***************************************************************/
FlagStatus AES_GetFlagStatus(AES_TYPE_IF IFName)
{
if(AES->CON.Word & IFName) {
return SET;
}
return RESET;
}
/***************************************************************
函数名AES_ClearITPendingBit
描 述AES清除特定中断标志函数
输入值IFName
AES_IF_DONE 加解密完成中断
输出值:无
返回值:无
***************************************************************/
void AES_ClearITPendingBit(void)
{
/* 考虑到IF与GO_DONE在同一个word中对IF赋值可能会存在一些问题
* 例如GO_DONE是1时取值随后GO_DONE变成0而赋值会以原来的1再对其进行赋值
* 该部分需要进行测试
*/
if(AES->CON.GO_DONE == SET)
{
return;
}
AES->CON.IF = SET;
return;
}
/***************************************************************
函数名AES_GetDoneStatus
描 述AES获得是否加/解密完成
输入值:无
输出值:无
返回值AES_DONE_NO 加密未完成
AES_DONE_YES 未加密或者加密已经完成
***************************************************************/
AES_TYPE_DONE AES_GetDoneStatus(void)
{
if(AES->CON.GO_DONE == 1)
{
return AES_DONE_NO;
}
return AES_DONE_YES;
}
/***************************************************************
函数名AES_Reset
描 述AES复位
输入值:无
输出值:无
返回值:无
***************************************************************/
void AES_Reset(void)
{
AES->DATA0.Word = 0x00000000;
AES->DATA1.Word = 0x00000000;
AES->DATA2.Word = 0x00000000;
AES->DATA3.Word = 0x00000000;
AES->KEY0.Word = 0x00000000;
AES->KEY1.Word = 0x00000000;
AES->KEY2.Word = 0x00000000;
AES->KEY3.Word = 0x00000000;
AES->CON.Word = 0x00000000;
}