DataChunk DESECBEncrypt(DataChunk messageChunk, Block key)
{
DataChunk cipherChunk = initDataChunk(messageChunk.iLength - messageChunk.iLength % 8 + 16);
Block message = initBlock(64), cipher;
KeySchedule k;
int i;
cipher = initBlock(64);
k = DESKeySchedule(key);
for (i = 0; i < messageChunk.iLength / 8; i++) {
memcpy(message, messageChunk.block + 8 * i, 8);
cipher = DESEncrypt(message, k);
memcpy(cipherChunk.block + 8 * i, cipher, 8);
}
free(message);
// If the length is not an integral multiple of 8.
if (messageChunk.iLength % 8) {
memcpy((message = initBlock(64)), messageChunk.block + 8 * i, messageChunk.iLength % 8);
cipher = DESEncrypt(message, k);
memcpy(cipherChunk.block + 8 * i, cipher, 8);
}
return (cipherChunk);
}
//========================================
// test_fun1 功能是计算DES加密
// RxComm[1]:
// RxComm[2..9]: 8字节密钥
// RxComm[10] : 待加密数据的长度
// RxComm[11....N]: 待加密数据
//========================================
void test_fun1(unsigned char xdata *RxComm,unsigned char xdata *TxComm)
{
unsigned char i;
unsigned char xdata in[129]; //待加密的数据长度 不超过128字节
unsigned char xdata out[128];
unsigned char xdata key[9];
key[0] = 8;
for(i=0;i<8;i++)
{
key[i+1] = RxComm[i+2];
}
in[0] = RxComm[10]; // 待加密数据的长度
for(i=0;i<in[0] ;i++)
{
in[i+1] = RxComm[i+11];
}
DESEncrypt(in,key,out);// in,key 两个输入参数都是LV格式,输出参数out也是LV格式.
for(i=0;i<out[0];i++)
{
TxComm[i+1] = out[i+1]; //输出8字节DES加密的结果
}
TxComm[0]=out[0]; //输出长度为 out[0]
}
void testDES() {
Block message = initBlock(64);
KeySchedule k1;
Block key = (unsigned char*)"12345678";
Block cifer;
memset(message, 0x01, 8);
k1 = DESKeySchedule(key);
cifer = DESEncrypt(message, k1);
//17 c1 2b 68 ab 3a a1 4c
}