| #include "openssl/sms4.h"
#include #define GETCH() getchar()
#define PUTCH(ch) int SM4_ECB(int Flag, unsigned char* Key, unsigned char* In, unsigned char* Out, unsigned int Len);
int AddPadding(unsigned char* In, int inLen, unsigned char* Out, int* outLen); /*
sm4 ecb模式加密/解密
Flag 运算标志，0为加密，1为解密。
Key sm4算法密钥。
In sm4算法ecb运算输入数据。
Out sm4算法ecb计算得到密文。
Len ecb明文/密文长度。
*/
int SM4_ECB(int Flag, unsigned char* Key, unsigned char* In, unsigned char* Out, unsigned int Len)
{
int i;
int Ret;
int PadLen;
unsigned char Pad[256];//可以根据实际情况malloc需要的空间
sms4_key_t key;
if (!Flag)
{
memset(Pad, 0, sizeof(Pad));
Ret = AddPadding(In, Len, Pad, &PadLen);//检查是否是16倍数，不是补全
if (Ret < 0)
{
return -2;
}
sms4_set_encrypt_key(&key, Key); for (i = 0; i < PadLen / 16; i++)
{
sms4_encrypt(Pad + i * 16, Out + i * 16, &key);
}
}
else
{
sms4_set_decrypt_key(&key, Key);
for (i = 0; i < Len / 16; i++)
{
sms4_encrypt(In + i * 16, Out + i * 16, &key);
}
}
return 0;
}
int AddPadding(unsigned char* In, int inLen, unsigned char* Out, int* outLen)
{
int PaddingLen = -1;
char tmpPadding[16]; if (inLen <= 0)
{
return -1;
}
*outLen = 0;
PaddingLen = 16 - (inLen % 16 == 0 ? 16 : inLen % 16);
if (PaddingLen == 0)
{
memcpy(Out, In, inLen);
*outLen = inLen;
return 1;
}
memset(tmpPadding, 0, 16);
memset(tmpPadding, PaddingLen, PaddingLen); memcpy(Out, In, inLen);
*outLen += inLen; memcpy(Out + *outLen, tmpPadding, PaddingLen);
*outLen += PaddingLen;
return 0;
} int main()
{
int rv;
int flag = 0;
unsigned char pbKeyValue[16] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10 };
unsigned char pbPlainText[16] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10 };
unsigned char pbCipherText[16] = { 0x68,0x1e,0xdf,0x34,0xd2,0x06,0x96,0x5e,0x86,0xb3,0xe9,0x4f,0x53,0x6e,0x42,0x46 };
unsigned char pbDataOut[16] = { 0 }; unsigned int len = sizeof(pbPlainText);
//flag=0，调用加密方法，将加密结果取出与标准加密结果对比
rv = SM4_ECB(flag, pbKeyValue, pbPlainText, pbDataOut, len);
if (len != sizeof(pbCipherText) || memcmp(pbDataOut, pbCipherText, len) != 0)
{
printf("\n");
printf("sm4-ecb encrypt is error!\n");
printf("\n按任意键继续...");
GETCH();
}
else
{
printf("\n");
printf("sm4-ecb encrypt is ok!\n");
printf("\n按任意键继续...");
GETCH();
}
} |
