.h文件
#include "sm4.h"
//4字节无符号数组转无符号long型
void four_uCh2uLong(u8 *in, u32 *out)
{
int i = 0;
*out = 0;
for (i = 0; i < 4; i++)
*out = ((u32)in[i] << (24 - i * 8)) ^ *out;
}
//无符号long型转4字节无符号数组
void uLong2four_uCh(u32 in, u8 *out)
{
int i = 0;
//从32位unsigned long的高位开始取
for (i = 0; i < 4; i++)
*(out + i) = (u32)(in >> (24 - i * 8));
}
//左移,保留丢弃位放置尾部
u32 move(u32 data, int length)
{
u32 result = 0;
result = (data << length) ^ (data >> (32 - length));
return result;
}
//秘钥处理函数,先使用Sbox进行非线性变化,再将线性变换L置换为L'
u32 func_key(u32 input)
{
int i = 0;
u32 ulTmp = 0;
u8 ucIndexList[4] = { 0 };
u8 ucSboxValueList[4] = { 0 };
uLong2four_uCh(input, ucIndexList);
for (i = 0; i < 4; i++)
{
ucSboxValueList[i] = TBL_SBOX[ucIndexList[i]];
}
four_uCh2uLong(ucSboxValueList, &ulTmp);
ulTmp = ulTmp ^ move(ulTmp, 13) ^ move(ulTmp, 23);
return ulTmp;
}
//加解密数据处理函数,先使用Sbox进行非线性变化,再进行线性变换L
u32 func_data(u32 input)
{
int i = 0;
u32 ulTmp = 0;
u8 ucIndexList[4] = { 0 };
u8 ucSboxValueList[4] = { 0 };
uLong2four_uCh(input, ucIndexList);
for (i = 0; i < 4; i++)
{
ucSboxValueList[i] = TBL_SBOX[ucIndexList[i]];
}
four_uCh2uLong(ucSboxValueList, &ulTmp);
ulTmp = ulTmp ^ move(ulTmp, 2) ^ move(ulTmp, 10) ^ move(ulTmp, 18) ^ move(ulTmp, 24);
return ulTmp;
}
//加密函数(可以加密任意长度数据,16字节为一次循环,不足部分补0凑齐16字节的整数倍)
//len:数据长度(任意长度数据) key:密钥(16字节) input:输入的原始数据 output:加密后输出数据
void encode_fun(u8 len,u8 *key, u8 *input, u8 *output)
{
int i = 0,j=0;
u8 *p = (u8 *)malloc(50); //定义一个50字节缓存区
u32 ulKeyTmpList[4] = { 0 }; //存储密钥的u32数据
u32 ulKeyList[36] = { 0 }; //用于密钥扩展算法与系统参数FK运算后的结果存储
u32 ulDataList[36] = { 0 }; //用于存放加密数据
/***************************开始生成子秘钥********************************************/
four_uCh2uLong(key, &(ulKeyTmpList[0]));
four_uCh2uLong(key + 4, &(ulKeyTmpList[1]));
four_uCh2uLong(key + 8, &(ulKeyTmpList[2]));
four_uCh2uLong(key + 12, &(ulKeyTmpList[3]));
ulKeyList[0] = ulKeyTmpList[0] ^ TBL_SYS_PARAMS[0];
ulKeyList[1] = ulKeyTmpList[1] ^ TBL_SYS_PARAMS[1];
ulKeyList[2] = ulKeyTmpList[2] ^ TBL_SYS_PARAMS[2];
ulKeyList[3] = ulKeyTmpList[3] ^ TBL_SYS_PARAMS[3];
for (i = 0; i < 32; i++) //32次循环迭代运算
{
//5-36为32个子秘钥
ulKeyList[i + 4] = ulKeyList[i] ^ func_key(ulKeyList[i + 1] ^ ulKeyList[i + 2] ^ ulKeyList[i + 3] ^ TBL_FIX_PARAMS[i]);
}
/***********************************生成32轮32位长子秘钥结束**********************************/
for (i = 0; i < len; i++) //将输入数据存放在p缓存区
*(p + i) = *(input + i);
for (i = 0; i < 16-len % 16; i++)//将不足16位补0凑齐16的整数倍
*(p + len + i) = 0;
for (j = 0; j < len / 16 + ((len % 16) ? 1:0); j++) //进行循环加密,并将加密后数据保存(可以看出此处是以16字节为一次加密,进行循环,即若16字节则进行一次,17字节补0至32字节后进行加密两次,以此类推)
{
/*开始处理加密数据*/
four_uCh2uLong(p + 16 * j, &(ulDataList[0]));
four_uCh2uLong(p + 16 * j + 4, &(ulDataList[1]));
four_uCh2uLong(p + 16 * j + 8, &(ulDataList[2]));
four_uCh2uLong(p + 16 * j + 12, &(ulDataList[3]));
//加密
for (i = 0; i < 32; i++)
{
ulDataList[i + 4] = ulDataList[i] ^ func_data(ulDataList[i + 1] ^ ulDataList[i + 2] ^ ulDataList[i + 3] ^ ulKeyList[i + 4]);
}
/*将加密后数据输出*/
uLong2four_uCh(ulDataList[35], output + 16 * j);
uLong2four_uCh(ulDataList[34], output + 16 * j + 4);
uLong2four_uCh(ulDataList[33], output + 16 * j + 8);
uLong2four_uCh(ulDataList[32], output + 16 * j + 12);
}
free(p);
}
//解密函数(与加密函数基本一致,只是秘钥使用的顺序不同,即把钥匙反着用就是解密)
//len:数据长度 key:密钥 input:输入的加密后数据 output:输出的解密后数据
void decode_fun(u8 len,u8 *key, u8 *input, u8 *output)
{
int i = 0,j=0;
u32 ulKeyTmpList[4] = { 0 };//存储密钥的u32数据
u32 ulKeyList[36] = { 0 }; //用于密钥扩展算法与系统参数FK运算后的结果存储
u32 ulDataList[36] = { 0 }; //用于存放加密数据
/*开始生成子秘钥*/
four_uCh2uLong(key, &(ulKeyTmpList[0]));
four_uCh2uLong(key + 4, &(ulKeyTmpList[1]));
four_uCh2uLong(key + 8, &(ulKeyTmpList[2]));
four_uCh2uLong(key + 12, &(ulKeyTmpList[3]));
ulKeyList[0] = ulKeyTmpList[0] ^ TBL_SYS_PARAMS[0];
ulKeyList[1] = ulKeyTmpList[1] ^ TBL_SYS_PARAMS[1];
ulKeyList[2] = ulKeyTmpList[2] ^ TBL_SYS_PARAMS[2];
ulKeyList[3] = ulKeyTmpList[3] ^ TBL_SYS_PARAMS[3];
for (i = 0; i < 32; i++) //32次循环迭代运算
{
//5-36为32个子秘钥
ulKeyList[i + 4] = ulKeyList[i] ^ func_key(ulKeyList[i + 1] ^ ulKeyList[i + 2] ^ ulKeyList[i + 3] ^ TBL_FIX_PARAMS[i]);
}
/*生成32轮32位长子秘钥结束*/
for (j = 0; j < len / 16; j++) //进行循环加密,并将加密后数据保存
{
/*开始处理解密数据*/
four_uCh2uLong(input + 16 * j, &(ulDataList[0]));
four_uCh2uLong(input + 16 * j + 4, &(ulDataList[1]));
four_uCh2uLong(input + 16 * j + 8, &(ulDataList[2]));
four_uCh2uLong(input + 16 * j + 12, &(ulDataList[3]));
//解密
for (i = 0; i < 32; i++)
{
ulDataList[i + 4] = ulDataList[i] ^ func_data(ulDataList[i + 1] ^ ulDataList[i + 2] ^ ulDataList[i + 3] ^ ulKeyList[35 - i]);//与加密唯一不同的就是轮密钥的使用顺序
}
/*将解密后数据输出*/
uLong2four_uCh(ulDataList[35], output + 16 * j);
uLong2four_uCh(ulDataList[34], output + 16 * j + 4);
uLong2four_uCh(ulDataList[33], output + 16 * j + 8);
uLong2four_uCh(ulDataList[32], output + 16 * j + 12);
}
}
//无符号字符数组转16进制打印
void print_hex(u8 *data, int len)
{
int i = 0;
char alTmp[16] = { '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' };
for (i = 0; i < len; i++)
{
printf("%c", alTmp[data[i] / 16]);
printf("%c", alTmp[data[i] % 16]);
putchar(' ');
}
putchar('\n');
}
/*在主函数中实现任意字节加密与解密,并且结果正确*/
int main(void)
{
u8 i,len;
u8 encode_Result[50] = { 0 }; //定义加密输出缓存区
u8 decode_Result[50] = { 0 }; //定义解密输出缓存区
u8 key[16] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10 }; //定义16字节的密钥
//u8 Data_plain[18] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23 };//定义18字节的原始输入数据(测试用)
//u8 Data_plain[32] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10 };//定义32字节的原始输入数据(测试用)
u8 Data_plain[16] = { 0x01,0x23,0,0,0,0,0,0,0,0,0,0,0,0,0,0};//定义16字节的原始输入数据(测试用)
len = 16 * (sizeof(Data_plain) / 16) + 16 * ((sizeof(Data_plain) % 16) ? 1 : 0);//得到扩充后的字节数(解密函数会用到)
encode_fun(sizeof(Data_plain),key, Data_plain, encode_Result); //数据加密
printf("加密后数据是:\n");
for (i = 0; i < len ; i++)
printf("%x ", *(encode_Result + i));
/*注意:此处解密函数的输入数据长度应为扩展后的数据长度,即必为16的倍数*/
decode_fun(len,key, encode_Result, decode_Result); //数据解密
printf("解密后数据是:\n");
for (i = 0; i < len; i++)
printf("%x ", *(decode_Result + i));
system("pause");
return 0;
}
.c文件
#include "sm4.h"
//4字节无符号数组转无符号long型
void four_uCh2uLong(u8 *in, u32 *out)
{
int i = 0;
*out = 0;
for (i = 0; i < 4; i++)
*out = ((u32)in[i] << (24 - i * 8)) ^ *out;
}
//无符号long型转4字节无符号数组
void uLong2four_uCh(u32 in, u8 *out)
{
int i = 0;
//从32位unsigned long的高位开始取
for (i = 0; i < 4; i++)
*(out + i) = (u32)(in >> (24 - i * 8));
}
//左移,保留丢弃位放置尾部
u32 move(u32 data, int length)
{
u32 result = 0;
result = (data << length) ^ (data >> (32 - length));
return result;
}
//秘钥处理函数,先使用Sbox进行非线性变化,再将线性变换L置换为L'
u32 func_key(u32 input)
{
int i = 0;
u32 ulTmp = 0;
u8 ucIndexList[4] = { 0 };
u8 ucSboxValueList[4] = { 0 };
uLong2four_uCh(input, ucIndexList);
for (i = 0; i < 4; i++)
{
ucSboxValueList[i] = TBL_SBOX[ucIndexList[i]];
}
four_uCh2uLong(ucSboxValueList, &ulTmp);
ulTmp = ulTmp ^ move(ulTmp, 13) ^ move(ulTmp, 23);
return ulTmp;
}
//加解密数据处理函数,先使用Sbox进行非线性变化,再进行线性变换L
u32 func_data(u32 input)
{
int i = 0;
u32 ulTmp = 0;
u8 ucIndexList[4] = { 0 };
u8 ucSboxValueList[4] = { 0 };
uLong2four_uCh(input, ucIndexList);
for (i = 0; i < 4; i++)
{
ucSboxValueList[i] = TBL_SBOX[ucIndexList[i]];
}
four_uCh2uLong(ucSboxValueList, &ulTmp);
ulTmp = ulTmp ^ move(ulTmp, 2) ^ move(ulTmp, 10) ^ move(ulTmp, 18) ^ move(ulTmp, 24);
return ulTmp;
}
//加密函数(可以加密任意长度数据,16字节为一次循环,不足部分补0凑齐16字节的整数倍)
//len:数据长度(任意长度数据) key:密钥(16字节) input:输入的原始数据 output:加密后输出数据
void encode_fun(u8 len,u8 *key, u8 *input, u8 *output)
{
int i = 0,j=0;
u8 *p = (u8 *)malloc(50); //定义一个50字节缓存区
u32 ulKeyTmpList[4] = { 0 }; //存储密钥的u32数据
u32 ulKeyList[36] = { 0 }; //用于密钥扩展算法与系统参数FK运算后的结果存储
u32 ulDataList[36] = { 0 }; //用于存放加密数据
/***************************开始生成子秘钥********************************************/
four_uCh2uLong(key, &(ulKeyTmpList[0]));
four_uCh2uLong(key + 4, &(ulKeyTmpList[1]));
four_uCh2uLong(key + 8, &(ulKeyTmpList[2]));
four_uCh2uLong(key + 12, &(ulKeyTmpList[3]));
ulKeyList[0] = ulKeyTmpList[0] ^ TBL_SYS_PARAMS[0];
ulKeyList[1] = ulKeyTmpList[1] ^ TBL_SYS_PARAMS[1];
ulKeyList[2] = ulKeyTmpList[2] ^ TBL_SYS_PARAMS[2];
ulKeyList[3] = ulKeyTmpList[3] ^ TBL_SYS_PARAMS[3];
for (i = 0; i < 32; i++) //32次循环迭代运算
{
//5-36为32个子秘钥
ulKeyList[i + 4] = ulKeyList[i] ^ func_key(ulKeyList[i + 1] ^ ulKeyList[i + 2] ^ ulKeyList[i + 3] ^ TBL_FIX_PARAMS[i]);
}
/***********************************生成32轮32位长子秘钥结束**********************************/
for (i = 0; i < len; i++) //将输入数据存放在p缓存区
*(p + i) = *(input + i);
for (i = 0; i < 16-len % 16; i++)//将不足16位补0凑齐16的整数倍
*(p + len + i) = 0;
for (j = 0; j < len / 16 + ((len % 16) ? 1:0); j++) //进行循环加密,并将加密后数据保存(可以看出此处是以16字节为一次加密,进行循环,即若16字节则进行一次,17字节补0至32字节后进行加密两次,以此类推)
{
/*开始处理加密数据*/
four_uCh2uLong(p + 16 * j, &(ulDataList[0]));
four_uCh2uLong(p + 16 * j + 4, &(ulDataList[1]));
four_uCh2uLong(p + 16 * j + 8, &(ulDataList[2]));
four_uCh2uLong(p + 16 * j + 12, &(ulDataList[3]));
//加密
for (i = 0; i < 32; i++)
{
ulDataList[i + 4] = ulDataList[i] ^ func_data(ulDataList[i + 1] ^ ulDataList[i + 2] ^ ulDataList[i + 3] ^ ulKeyList[i + 4]);
}
/*将加密后数据输出*/
uLong2four_uCh(ulDataList[35], output + 16 * j);
uLong2four_uCh(ulDataList[34], output + 16 * j + 4);
uLong2four_uCh(ulDataList[33], output + 16 * j + 8);
uLong2four_uCh(ulDataList[32], output + 16 * j + 12);
}
free(p);
}
//解密函数(与加密函数基本一致,只是秘钥使用的顺序不同,即把钥匙反着用就是解密)
//len:数据长度 key:密钥 input:输入的加密后数据 output:输出的解密后数据
void decode_fun(u8 len,u8 *key, u8 *input, u8 *output)
{
int i = 0,j=0;
u32 ulKeyTmpList[4] = { 0 };//存储密钥的u32数据
u32 ulKeyList[36] = { 0 }; //用于密钥扩展算法与系统参数FK运算后的结果存储
u32 ulDataList[36] = { 0 }; //用于存放加密数据
/*开始生成子秘钥*/
four_uCh2uLong(key, &(ulKeyTmpList[0]));
four_uCh2uLong(key + 4, &(ulKeyTmpList[1]));
four_uCh2uLong(key + 8, &(ulKeyTmpList[2]));
four_uCh2uLong(key + 12, &(ulKeyTmpList[3]));
ulKeyList[0] = ulKeyTmpList[0] ^ TBL_SYS_PARAMS[0];
ulKeyList[1] = ulKeyTmpList[1] ^ TBL_SYS_PARAMS[1];
ulKeyList[2] = ulKeyTmpList[2] ^ TBL_SYS_PARAMS[2];
ulKeyList[3] = ulKeyTmpList[3] ^ TBL_SYS_PARAMS[3];
for (i = 0; i < 32; i++) //32次循环迭代运算
{
//5-36为32个子秘钥
ulKeyList[i + 4] = ulKeyList[i] ^ func_key(ulKeyList[i + 1] ^ ulKeyList[i + 2] ^ ulKeyList[i + 3] ^ TBL_FIX_PARAMS[i]);
}
/*生成32轮32位长子秘钥结束*/
for (j = 0; j < len / 16; j++) //进行循环加密,并将加密后数据保存
{
/*开始处理解密数据*/
four_uCh2uLong(input + 16 * j, &(ulDataList[0]));
four_uCh2uLong(input + 16 * j + 4, &(ulDataList[1]));
four_uCh2uLong(input + 16 * j + 8, &(ulDataList[2]));
four_uCh2uLong(input + 16 * j + 12, &(ulDataList[3]));
//解密
for (i = 0; i < 32; i++)
{
ulDataList[i + 4] = ulDataList[i] ^ func_data(ulDataList[i + 1] ^ ulDataList[i + 2] ^ ulDataList[i + 3] ^ ulKeyList[35 - i]);//与加密唯一不同的就是轮密钥的使用顺序
}
/*将解密后数据输出*/
uLong2four_uCh(ulDataList[35], output + 16 * j);
uLong2four_uCh(ulDataList[34], output + 16 * j + 4);
uLong2four_uCh(ulDataList[33], output + 16 * j + 8);
uLong2four_uCh(ulDataList[32], output + 16 * j + 12);
}
}
//无符号字符数组转16进制打印
void print_hex(u8 *data, int len)
{
int i = 0;
char alTmp[16] = { '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' };
for (i = 0; i < len; i++)
{
printf("%c", alTmp[data[i] / 16]);
printf("%c", alTmp[data[i] % 16]);
putchar(' ');
}
putchar('\n');
}
/*在主函数中实现任意字节加密与解密,并且结果正确*/
int main(void)
{
u8 i,len;
u8 encode_Result[50] = { 0 }; //定义加密输出缓存区
u8 decode_Result[50] = { 0 }; //定义解密输出缓存区
u8 key[16] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10 }; //定义16字节的密钥
//u8 Data_plain[18] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23 };//定义18字节的原始输入数据(测试用)
//u8 Data_plain[32] = { 0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10 };//定义32字节的原始输入数据(测试用)
u8 Data_plain[16] = { 0x01,0x23,0,0,0,0,0,0,0,0,0,0,0,0,0,0};//定义16字节的原始输入数据(测试用)
len = 16 * (sizeof(Data_plain) / 16) + 16 * ((sizeof(Data_plain) % 16) ? 1 : 0);//得到扩充后的字节数(解密函数会用到)
encode_fun(sizeof(Data_plain),key, Data_plain, encode_Result); //数据加密
printf("加密后数据是:\n");
for (i = 0; i < len ; i++)
printf("%x ", *(encode_Result + i));
/*注意:此处解密函数的输入数据长度应为扩展后的数据长度,即必为16的倍数*/
decode_fun(len,key, encode_Result, decode_Result); //数据解密
printf("解密后数据是:\n");
for (i = 0; i < len; i++)
printf("%x ", *(decode_Result + i));
system("pause");
return 0;
}