aes⼦密钥⽣成c语⾔_AES加密解密算法C语⾔代码实现/*------------------------------------ This program demonstrates how to use AES to encrypt/decrypt a
block (128 bits) of data.
Editer:NeilJones
Date:2014/11/10
-----------------------------------*/
#include
#include
int RoundKey[10][16]; //!> 轮密钥 ；
int CipherKey[16]={0x2b,0x28,0xab,0x09, // !>(例⼦)加密密钥；
0x7e,0xae,0xf7,0xcf,
0x15,0xd2,0x15,0x4f,
0x16,0xa6,0x88,0x3c};
int State[16]={0x32,0x88,0x31,0xe0, // !>(例⼦)明⽂；
0x43,0x5a,0x31,0x37,
0xf6,0x30,0x98,0x07,
0xa8,0x8d,0xa2,0x34};
int sbox[256] = {
//0 1 2 3 4 5 6 7 8 9 A B C D E F
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, //0
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, //1
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, //2
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, //3
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, //4
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, //5
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, //6
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, //7
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, //8
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, //9
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, //A
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, //B
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, //C
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, //D
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, //E 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 }; //F int rsbox[256] = {
//0 1 2 3 4 5 6 7 8 9 A B C D E F
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };
int Rcon[40] = {
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
/*------------------------------
--------------------------------*/
void AddRoundKey(int * ex_state, int * RoundKey); //密钥加函数；
void SubBytes(int * ex_state, int * S_box); //字节代换函数； void ShiftRows(int * ex_state); //⾏移位函数；
void MixColumns(int * ex_state); //列混合函数；
void Round(int * ex_state, int * S_box,int * RoundKey); //轮函数;
void Final_Round(int * ex_state, int * S_box,int * RoundKey); //最后轮函数；
void Aes_Encrypt(int * ex_state, int * S_box,int *cphkey,int RoundKey[10][16]); //加密函数；void Aes_Decrypt(int * ex_state, int * S_box,int *cphkey,int RoundKey[10][16]); //解密函数；void RotByte(int * temp); //!>移位函数(作为Key_Schedule函数的辅助函数)
void Key_Schedule(int * cphkey,int RoundKey[10][16]); //⽣成轮密钥的函数；
void InvSubBytes(int * ex_state, int * RS_box); //逆字节代换函数；
void InvShiftRows(int * ex_state); //逆⾏移位函数；
void InvMixColumns(int * ex_state); //逆列混合函数；
void InvRound(int * ex_state, int * RS_box,int * RoundKey); //逆轮函数;
void InvFinal_Round(int * ex_state, int * RS_box,int * RoundKey);//逆最后轮函数；
/*---------------------------------*/
/*-----------------------------------
函数功能具体实现
------------------------------------*/
void SubBytes(int * ex_state, int * S_box) //字节代换函数；
{
int i,k;
for(i=0;i<16;i++)
{
k=ex_state[i];
ex_state[i]=S_box[k];
}
}
void ShiftRows(int * ex_state) //⾏移位函数；
{
int k,temp;
/*--------------*第⼆⾏(不好意思，原谅我⽤的⽅法⽐较笨 0.0 )；
temp=ex_state[4];
ex_state[4]=ex_state[5];
ex_state[5]=ex_state[6];
ex_state[6]=ex_state[7];
ex_state[7]=temp;
/*-------------------*第三⾏；
temp=ex_state[8];
ex_state[8]=ex_state[10];
ex_state[10]=temp;
temp=ex_state[9];
ex_state[9]=ex_state[11];
ex_state[11]=temp;
/*-------------------*///第四⾏；这⾥的话就需要两个缓存来辅助了；
temp=ex_state[13];
ex_state[13]=ex_state[12];
k=ex_state[14];
ex_state[14]=temp;
temp=ex_state[15];
ex_state[15]=k;
ex_state[12]=temp;
/*--------------------*/
}
void AddRoundKey(int * ex_state, int * RoundKey) //密钥加函数；
{
int i;
for(i=0;i<4;i++)
{
ex_state[i]^=RoundKey[i];
ex_state[i+4]^=RoundKey[i+4];
ex_state[i+8]^=RoundKey[i+8];
ex_state[i+12]^=RoundKey[i+12];
}
}
/*----------------------------------------------------*以下三个函数都属于MixColumns函数范畴；int xtime(int n) //!> ⽤来把这个数*0x02;
{
int temp;
temp=n<<1;
if(n&0x80)
{
temp=temp^0x1b;
}
return temp;
}
int mixcolumn(int m,int n)
{
int temp;
for(temp=m,m=0;n;n=n>>1)
{
if(n&1)
{
m=m^temp;
}
temp=xtime(temp);
}
return m&0xff;
}
void MixColumns(int * ex_state) //列混合函数；还需要⼀个mix()函数来帮助这个函数;
{
int i;
int p_state[16]={0}; //定义⼀个新的p-state来记录输⼊的ex_state，以免ex_state发⽣变化时，p-state还能使⽤原先的那个ex_state;
for(i=0;i<16;i++)
p_state[i]=ex_state[i];
for(i=0;i<16;i++)
{
if(i>=0&&i<4)
{
ex_state[i]=mixcolumn(ex_state[i],0x02)^mixcolumn(ex_state[i+1*4],0x03)^p_state[i+2*4]^p_state[i+3*4];
}
else if(i>=4&&i<8)
{
ex_state[i]=p_state[i-4]^mixcolumn(ex_state[i],0x02)^mixcolumn(ex_state[i+1*4],0x03)^p_state[i+2*4];
}
else if(i>=8&&i<12)
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