AES源码（java）实现过程解析
最近要学习AES的算法实现过程，在⽹上了很多AES加解密的代码，发现⼤多数都是调⽤API的，看不到具体实现过程，后来在CSDN上了⼀下AES的源码(免积分的)，但是没有注释，有注释的都需要积分，所以我⾃⼰理了⼀遍，顺便把源码也分享给⼤家。
在分析代码的过程中发现下载的代码是按照⾏排序的，但是课本中讲的是按照列排序，所以后⾯我⾃⼰⼜把代码写成列排序的。下⾯解释⼀下什么是** ⾏列 **排序。
按照列排序
输⼊序列为：x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 x16
矩阵排列为：
x1 x5 x9 x13
x2 x6 x10 x14
x3 x7 x11 x15
x4 x8 x12 x16
按照⾏排序
输⼊序列为：x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 x16
矩阵排列为：
x1 x2 x3 x4
x5 x6 x7 x8
x9 x10 x11 x12
x13 x14 x15 x16
最后给出实现代码⾸先是列实现，然后是⾏实现。
/**
* AES过程演⽰这是按照课程中AES讲解的顺序做的也就是按照列排序
* 输⼊序列为：x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 x16
* 矩阵排列为：
* x1 x5 x9 x13
* x2 x6 x10 x14
* x3 x7 x11 x15
* x4 x8 x12 x16
*
* @author Bloomeet
* @time 2018/9/23 19:55
*/
public class AESclass_column {
static int Nr =10;//轮数
static int key[]={0x00,0x71,0xDA,0x60,0x01,0x01,0x79,0x15,0x20,
0x98,0x17,0x35,0x01,0xAE,0x14,0x94};//16进制密钥
static int text[]={0x00,0x01,0xda,0x86,0x01,0xA1,0x78,0x15,0x00,
0x98,0x17,0x35,0x01,0xAF,0x34,0x66};//16进制明⽂
// static int key[] = {0x00, 0x01, 0x20, 0x01, 0x71, 0x01, 0x98, 0xAE, 0xDA,
// 0x79, 0x17, 0x14, 0x60, 0x15, 0x35, 0x94};//16进制密钥
//
// static int text[] = {0x00, 0x01, 0x00, 0x01, 0x01, 0xA1, 0x98, 0xAF, 0xDA,
// 0x78, 0x17, 0x34, 0x86, 0x15, 0x35, 0x66};//16进制明⽂
// 0x78, 0x17, 0x34, 0x86, 0x15, 0x35, 0x66};//16进制明⽂
static int sbox[]={0x63,0x7C,0x77,0x7B,0xF2,0x6B,0x6F,0xC5,0x30, 0x01,0x67,0x2B,0xFE,0xD7,0xAB,0x76,0xCA,0x82,0xC9,0x7D,
0xFA,0x59,0x47,0xF0,0xAD,0xD4,0xA2,0xAF,0x9C,0xA4,0x72,
0xC0,0xB7,0xFD,0x93,0x26,0x36,0x3F,0xF7,0xCC,0x34,0xA5,
0xE5,0xF1,0x71,0xD8,0x31,0x15,0x04,0xC7,0x23,0xC3,0x18,
0x96,0x05,0x9A,0x07,0x12,0x80,0xE2,0xEB,0x27,0xB2,0x75,
0x09,0x83,0x2C,0x1A,0x1B,0x6E,0x5A,0xA0,0x52,0x3B,0xD6,
0xB3,0x29,0xE3,0x2F,0x84,0x53,0xD1,0x00,0xED,0x20,0xFC,
0xB1,0x5B,0x6A,0xCB,0xBE,0x39,0x4A,0x4C,0x58,0xCF,0xD0,
0xEF,0xAA,0xFB,0x43,0x4D,0x33,0x85,0x45,0xF9,0x02,0x7F,
机械键盘键位图0x50,0x3C,0x9F,0xA8,0x51,0xA3,0x40,0x8F,0x92,0x9D,0x38,
0xF5,0xBC,0xB6,0xDA,0x21,0x10,0xFF,0xF3,0xD2,0xCD,0x0C, 0x13,0xEC,0x5F,0x97,0x44,0x17,0xC4,0xA7,0x7E,0x3D,0x64,
0x5D,0x19,0x73,0x60,0x81,0x4F,0xDC,0x22,0x2A,0x90,0x88,
0x46,0xEE,0xB8,0x14,0xDE,0x5E,0x0B,0xDB,0xE0,0x32,0x3A,
0x0A,0x49,0x06,0x24,0x5C,0xC2,0xD3,0xAC,0x62,0x91,0x95,
0xE4,0x79,0xE7,0xC8,0x37,0x6D,0x8D,0xD5,0x4E,0xA9,0x6C,
0x56,0xF4,0xEA,0x65,0x7A,0xAE,0x08,0xBA,0x78,0x25,0x2E,
0x1C,0xA6,0xB4,0xC6,0xE8,0xDD,0x74,0x1F,0x4B,0xBD,0x8B,
0x8A,0x70,0x3E,0xB5,0x66,0x48,0x03,0xF6,0x0E,0x61,0x35,
0x57,0xB9,0x86,0xC1,0x1D,0x9E,0xE1,0xF8,0x98,0x11,0x69,
0xD9,0x8E,0x94,0x9B,0x1E,0x87,0xE9,0xCE,0x55,0x28,0xDF,
0x8C,0xA1,0x89,0x0D,0xBF,0xE6,0x42,0x68,0x41,0x99,0x2D,
0x0F,0xB0,0x54,0xBB,0x16,};//S盒表
static int RCon[];//密钥的常量数组
static int word[][];//轮密钥扩展后的数组，⼤⼩为 word[44][4]
public static void main(String[] args){
keyExpansion();//密钥
int i, r =0;
plottingtext =addRoundKey(text,0);//初始轮密钥加
r++;
for(; r <= Nr; r++){// 迭代10轮
for(i =0; i <16; i++){
text[i]=subByte(text[i]);// 字节替代
}
text =shiftRows(text);// ⾏移位
if(r !=10){// 注意：AES加密最后⼀轮没有列混合
text =mixColumn(text);// 列混合
}
text =addRoundKey(text, r);// 轮密钥加
}
//输出加密结果
for(i =0; i <16; i++){
System.out.HexString(text[i])+" ");
if(i %4==3){
System.out.println();
}
}
}
/**
* 密钥数组扩展
*/
static void keyExpansion(){
RCon =new int[10];//轮常量为固定值
RCon[0]=0x01;
RCon[1]=0x02;
RCon[2]=0x04;
RCon[3]=0x08;
RCon[4]=0x10;
RCon[5]=0x20;
RCon[6]=0x40;
RCon[7]=0x80;
RCon[8]=0x1B;
孙侨潞去世时的照片RCon[9]=0x36;
word =new int[44][4];//44组轮密钥
int i, j;
int temp[];
for(i =0; i <4; i++){
for(j =0; j <4; j++){
word[i][j]= key[j *4+ i];//把初始密钥放⼊数组
}
}
/*通过密钥计算规则计算余下数组
*
*1.如果i不是4的倍数，那么第i列由如下等式确定：
*W[i]=W[i-4]⨁W[i-1]
*2.如果i是4的倍数，那么第i列由如下等式确定：
*W[i]=W[i-4]⨁T(W[i-1])
*其中，T是⼀个有点复杂的函数。函数T由3部分组成：字循环(每次循环⼀位)、字节代换（s盒）和轮常量异或。 */
for(i =4; i <44; i++){
temp = word[i -1];//看作W[i-1]
if(i %4==0){//i为4的倍数进⼊函数运算 W[i-1]=T(W[i-1])
temp =subWord(rotWord(temp));
temp[0]= temp[0]^ RCon[i /4-1];
}
for(j =0; j <4; j++){
word[i][j]= word[i -4][j]^ temp[j];//相当于W[i]=W[i-4]⨁W[i-1]
}
}
}
//密钥扩展中的移位
static int[]rotWord(int[] word){
int[] rot =new int[4];
int i;
for(i =0; i <4; i++){
rot[i]= word[(i +1)%4];
}
return rot;
}
//密钥扩展中的4个字节的代换（4个字节为⼀组）例如 A2 BE C4 D5
static int[]subWord(int[] word){
int sub[]=new int[4];
int i;
for(i =0; i <4; i++){
歌词特效制作软件sub[i]=subByte(word[i]);
}
return sub;
}
}
//S盒的单个字节代换例如 AE
static int subByte(int w){
int x = w /16;
int y = w %16;
return sbox[x *16+ y];
}
//轮密钥加
static int[]addRoundKey(int[] text,int round){
int[] add =new int[16];
int i, j;
for(i =0; i <4; i++){
for(j =0; j <4; j++){
//System.out.HexString(word[4 * round + i][j]) + ",");//第round轮的轮密钥 add[4* j + i]= text[4* j + i]^ word[4* round + i][j];//逐⽐特异或
}
//System.out.println();
}
return add;
}
//⾏移位（循环移位）规则：第0⾏移0位 ..... 第3⾏移3位
static int[]shiftRows(int[] text){
int[] shift =new int[16];
int i, j;
for(i =0; i <4; i++){
for(j =0; j <4; j++){
if((4* i + j + i)==8||(4* i + j + i)==12||(4* i + j + i)==13||(4* i + j + i)>15){
shift[4* i + j]= text[(4* i + j + i)-4];
}else{
shift[4* i + j]= text[4* i + j + i];
}
}
}
return shift;
}
//列混合
static int[]mixColumn(int[] text){
int[] mix =new int[16];
int[] mass ={2,3,1,1,
1,2,3,1,
1,1,2,3,
3,1,1,2
};
int i, j, u;borderstyle设置边框样式的属性有哪些
for(i =0; i <16; i++){
u =0;
for(j =0; j <4; j++){
u = u ^fieldMulit(mass[(i /4)*4+ j], text[4* j + i %4]);
}
mix[i]= u;
}
return mix;
}
static int fieldMulit(int x,int y){
String xString = BinaryString(x);
int i, j, mul =0, tem = y;
int i, j, mul =0, tem = y;
for(i =0; i < xString.length(); i++){
if(xString.charAt(i)=='1'){
for(j =1; j < xString.length()- i; j++){
tem = tem <<1;
if(tem >255){
tem = tem %256;
tem = tem ^0x1b;
}
}
mul = mul ^ tem;
tem = y;
}
}
return mul;
}
}
/**
* AES过程演⽰按照⾏排列与课本中讲解的排列顺序相反
* 输⼊序列为：x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13 x14 x15 x16
* 矩阵排列为：
* x1 x2 x3 x4
* x5 x6 x7 x8java下载过程
* x9 x10 x11 x12
* x13 x14 x15 x16
*
* @author Bloomeet
* @time 2018/9/23 19:55
*/
public class AESclass_Line {
static int Nr =10;//轮数
static int key[]={0x00,0x01,0x20,0x01,0x71,0x01,0x98,0xAE,0xDA, 0x79,0x17,0x14,0x60,0x15,0x35,0x94};//16进制密钥
static int text[]={0x00,0x01,0x00,0x01,0x01,0xA1,0x98,0xAF,0xDA, 0x78,0x17,0x34,0x86,0x15,0x35,0x66};//16进制明⽂
static int sbox[]={0x63,0x7C,0x77,0x7B,0xF2,0x6B,0x6F,0xC5,0x30, 0x01,0x67,0x2B,0xFE,0xD7,0xAB,0x76,0xCA,0x82,0xC9,0x7D,
0xFA,0x59,0x47,0xF0,0xAD,0xD4,0xA2,0xAF,0x9C,0xA4,0x72,
0xC0,0xB7,0xFD,0x93,0x26,0x36,0x3F,0xF7,0xCC,0x34,0xA5,
0xE5,0xF1,0x71,0xD8,0x31,0x15,0x04,0xC7,0x23,0xC3,0x18,
0x96,0x05,0x9A,0x07,0x12,0x80,0xE2,0xEB,0x27,0xB2,0x75,
0x09,0x83,0x2C,0x1A,0x1B,0x6E,0x5A,0xA0,0x52,0x3B,0xD6,
0xB3,0x29,0xE3,0x2F,0x84,0x53,0xD1,0x00,0xED,0x20,0xFC,
0xB1,0x5B,0x6A,0xCB,0xBE,0x39,0x4A,0x4C,0x58,0xCF,0xD0,
0xEF,0xAA,0xFB,0x43,0x4D,0x33,0x85,0x45,0xF9,0x02,0x7F,
0x50,0x3C,0x9F,0xA8,0x51,0xA3,0x40,0x8F,0x92,0x9D,0x38,
0xF5,0xBC,0xB6,0xDA,0x21,0x10,0xFF,0xF3,0xD2,0xCD,0x0C, 0x13,0xEC,0x5F,0x97,0x44,0x17,0xC4,0xA7,0x7E,0x3D,0x64,
0x5D,0x19,0x73,0x60,0x81,0x4F,0xDC,0x22,0x2A,0x90,0x88,
0x46,0xEE,0xB8,0x14,0xDE,0x5E,0x0B,0xDB,0xE0,0x32,0x3A,
0x0A,0x49,0x06,0x24,0x5C,0xC2,0xD3,0xAC,0x62,0x91,0x95,
0xE4,0x79,0xE7,0xC8,0x37,0x6D,0x8D,0xD5,0x4E,0xA9,0x6C,
0x56,0xF4,0xEA,0x65,0x7A,0xAE,0x08,0xBA,0x78,0x25,0x2E,
0x1C,0xA6,0xB4,0xC6,0xE8,0xDD,0x74,0x1F,0x4B,0xBD,0x8B,
0x8A,0x70,0x3E,0xB5,0x66,0x48,0x03,0xF6,0x0E,0x61,0x35,
0x57,0xB9,0x86,0xC1,0x1D,0x9E,0xE1,0xF8,0x98,0x11,0x69,
0xD9,0x8E,0x94,0x9B,0x1E,0x87,0xE9,0xCE,0x55,0x28,0xDF,
0x8C,0xA1,0x89,0x0D,0xBF,0xE6,0x42,0x68,0x41,0x99,0x2D,
0x0F,0xB0,0x54,0xBB,0x16,};//S盒表
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