AES MFC实现

来源:http://www.goldns.net 作者:www.xpj68.com 人气:114 发布时间:2019-12-15
摘要:#include "stdafx.h" #include "AES.h" for (j = 0; j 4; j++) { State[0][j] = (unsigned char) ( (int)gfmultby0e(temp[j]) ^(int)gfmultby0b(temp[4+j]) ^ (int)gfmultby0d(temp[4*2+j]) ^ (int)gfmultby09(temp[4*3+j]) ); State[1][j] = (unsigned char)

#include "stdafx.h"
#include "AES.h"

for (j = 0; j < 4; j++)
{
State[0][j] = (unsigned char) ( (int)gfmultby0e(temp[j]) ^ (int)gfmultby0b(temp[4+j]) ^
(int)gfmultby0d(temp[4*2+j]) ^ (int)gfmultby09(temp[4*3+j]) );
State[1][j] = (unsigned char) ( (int)gfmultby09(temp[j]) ^ (int)gfmultby0e(temp[4+j]) ^
(int)gfmultby0b(temp[4*2+j]) ^ (int)gfmultby0d(temp[4*3+j]) );
State[2][j] = (unsigned char) ( (int)gfmultby0d(temp[j]) ^ (int)gfmultby09(temp[4+j]) ^
(int)gfmultby0e(temp[4*2+j]) ^ (int)gfmultby0b(temp[4*3+j]) );
State[3][j] = (unsigned char) ( (int)gfmultby0b(temp[j]) ^ (int)gfmultby0d(temp[4+j]) ^
(int)gfmultby09(temp[4*2+j]) ^ (int)gfmultby0e(temp[4*3+j]) );
}
}
////////////////////////////////////////////////////////////////////////////////////////////////
unsigned char Aes::gfmultby01(unsigned char b)
{
return b;
}
unsigned char Aes::gfmultby02(unsigned char b)
{
if (b < 0x80)
return (unsigned char)(int)(b <<1);
else
return (unsigned char)( (int)(b << 1) ^ (int)(0x1b) );
}

密学中的高档加密(Advanced Encryption Standard,AES),又称Rijndael加密法,是United States际结盟邦政党选取的蓬蓬勃勃种区块加密标准。那些正式用来替代原先的DES,已经被多方深入分析且广为全球所利用。经过四年的取舍流程,高等加密标准由美利哥国标与才能商量院 (NIST)于二〇〇三年四月12日宣告于FIPS PUB 197,并在二〇〇一年四月十一日改为有效的正规。二〇〇六年,高等加密标准已然成为对称密钥加密中最盛行的算法之生龙活虎。
透过三个星期的血战,终于在前任能解密16字节字符串的底子上解密任意长度字符串,并将其封装为类,今后的调用直接引用该类就能够,在包装的经过中可真是冲击出现众多题目,不算大,但却实在不轻巧找到在那之中的缓和的点子。
在包装的历程中要害现身转手多少个难题:
1、内部存款和储蓄器溢出
2、解密到自然长度的字符串后,解密现身乱码
3、 在用对话框程序开展测量检验时,明文也许密文展现不到对话框上
4、解密后,密文全部被译出,但后边跟着无端多出肯定长度的乱码
5、对话框中不能开展换行
6、有个别长度的字符串解密现身被截断,截断点前面包车型客车密文被译为乱码
7、相近长度的字符串,有些译出来准确,而有些译出来为乱码
8、无端提醒触发中断点
现今各自来论述以上难题应时而生的缘由及缓慢解决方案:
问题1:
由来:new内部存款和储蓄器的朗朗上口相当不足,由于字符串结尾字符的震慑招致边界溢出:如new: char *inBuff = new char [nLen];而选择的时候却用了nLen+1个字节。
不留余地方案:分配内部存款和储蓄器是多分配二个字节:char *inBuff = new char [nLen+1];
问题2:
缘由:在拓展解密时,将前方加密的字符串copy到缓存,而缓存的轻重分配不足,如本有14000个字节的密文,但解密缓存只抽成了513个字节来缓存密文。
除恶务尽方案:任何应用程序唯有达成效果与利益了,能力谈其属性,以致内部存款和储蓄器占用,所以应竭尽确保缓存的轻重,char inBuff[900000];
问题3:
由来:控件未有刷新。
削株掘根方案:在对话框程序中,如若想要直接通过edit控件的Value变量赋值给对话框,则必需刷新控件:程序后面加上UpDataData(卡塔尔;语句。
问题4:
案由:解密后的输出缓存分配过大。
解决方案:char *outPut=new char [nlen];
aes.InvCipherByte(m_key, inBuff,nlen,outPut卡塔尔;假使分配时为char *outPut=new char [nlen+1];则难点应时而生。
问题5:
缘由:对话框控件属性没有开展相应设置。
削株掘根方案:return——》true,多媒体——》true,滚动条——》true。
问题6:
原因: 字符串长度管理有误。
减轻方案: nlen=strlen(inBuff卡塔尔(英语:State of Qatar);
char *outPut=new char [nlen];如果 char *outPut=new char [nlen/3];字符串被截断。
问题7:
原因:如公开为12345(5个字节)、hello(5个字节),数字解密没难点,但字母现身乱码,是因为内部存款和储蓄器分配相当不够。
斩尽杀绝方案:分配内存时,多分配贰个字节
问题8:
原因:copy字符串时,copy长度多了。
施工方案:fwrite(ouBuff,1,inBuffLen,foutput卡塔尔;,要是fwrite(ouBuff,1,(inBuffLen+1),foutput卡塔尔(英语:State of Qatar);,难题现身。
实则真正在卷入时,现身的标题远远不仅于上述多少个。
最近证实下该类的骨干封装理念:
该类算法都是有法师们曾经设计好,大家只须要按大家和谐的内需多少组织下逻辑,前边已经有人解密16字节的字符串,并且各样算法还算不错了,这大家就只要求在16字节的基本功上持续大家的妄动长度。
于是乎应际而生了三个字符分割函数:void Split(CString source, CStringArray& dest, CString division卡塔尔(قطر‎;//字符串分割函数
起功用是将大家的字符串分割为拾九个字节后,调用前边原来就有的算法,当前在本文中该函数首若是用在解密中,而加密函数是一贯将分开算法写进加密函数。
一下子是已打包好的类:
头文件:
/****************************************************************
**功能:AES加密及解密——字符串(放肆长度)、文件(任意大小)
**作者:
**公司:
**始建日期:二零一二.11.6
*****************************************************************/

////////////////////////////////////////////////////////////////////////////////////////////////
//Aes解密函数(对文本解密能够调用该函数卡塔尔(英语:State of Qatar)
void Aes::InvCipher(unsigned char* input,unsigned char* output)
{
memset(&State[0][0],0,16);
for (int i = 0; i < (4 * Nb); i++)
{
State[i % 4][ i / 4] = input[i];
}

for(r=0; r<4; r++)
{
for(c=0; c<4 ;c++)
{
state[r][c] = input[c*4+r];
}
}

//////////////////////////////////////////////////////////////////////////////////////
//字符串解密函数(可解密大肆长度字符串)
//KeyValue:解密KEY值
//input:待解密的字符串
//outPut:解密后的字符串
void Aes::InvCipherByte(CString KeyValue, char *input,UINT nSend,char * outPut)
{
int length=strlen(KeyValue);
unsigned char str2[33];
strcpy((char *)str2,(LPSTR)(LPCTSTR)KeyValue);
if (length<=16&&length>0)keysize=16;
else if(length<=24&&length>16)keysize=24;
else if(length>24&&length<=32)keysize=32;
Aes aes(keysize,str2);

BYTE input1[16];
BYTE output1[16];

 

CString strSend;
strSend.Format("%s",input);

void InvSubBytes(unsigned char state[][4]);
void InvShiftRows(unsigned char state[][4]);
void InvMixColumns(unsigned char state[][4]);
};

}
////////////////////////////////////////////////////////////////////////////////////////////////
//构造函数
Aes::Aes(int keysize,unsigned char* keyBytes)
{
SetNbNkNr(keysize卡塔尔国; //设置密钥块数,轮数
memcpy(key,keyBytes,keysize卡塔尔; //字符串拷贝函数,把keyBytes的keysize个字符复制到key中
KeyExpansion(卡塔尔; //密钥扩大,必需超前做的初阶化
}
//字符ASCII码值到字符字面值的调换 如 '0'转变到0, 'a'转变来10
int Aes::char2num(char ch)
{
if(ch>='0'&&ch<='9')return ch-'0';
else if(ch>='a'&&ch<='f')return ch-'a'+10;
return 0;
}
////////////////////////////////////////////////////////////////////////////////////////////////
void Aes::SetNbNkNr(int keySize)
{
Nb=4;
if(keySize==Bits128)
{
Nk=4; //4*4字节,128位密钥,10轮加密
Nr=10;
}
else if(keySize==Bits192)
{
Nk=6; //6*4字节,192位密钥,12轮加密
Nr=12;
}
else if(keySize== Bits256)
{
Nk=8; //8*4字节,256位密钥,14轮加密
Nr=14;
}
}
////////////////////////////////////////////////////////////////////////////////////////////////
void Aes::KeyExpansion()
{

memset(w,0,16*15);
for(int row=0;row<Nk;row++) //拷贝seed 密钥
{
w[4*row+0] = key[4*row];
w[4*row+1] = key[4*row+1];
w[4*row+2] = key[4*row+2];
w[4*row+3] = key[4*row+3];
}
byte* temp = new byte[4];
for(int row=Nk;row<4*(Nr+1);row++)
{
temp[0]=w[4*row-4]; //当前列的前一列
temp[1]=w[4*row-3];
temp[2]=w[4*row-2];
temp[3]=w[4*row-1];
if(row%Nk==0卡塔尔(قطر‎ //逢nk时,对当前列的前一列作特殊管理
{
temp=SubWord(RotWord(temp卡塔尔国卡塔尔(قطر‎; //先移位,再代换,最终和轮常量异或
temp[0] = (byte)( (int)temp[0] ^ (int) AesRcon[4*(row/Nk)+0] );
temp[1] = (byte)( (int)temp[1] ^ (int) AesRcon[4*(row/Nk)+1] );
temp[2] = (byte)( (int)temp[2] ^ (int) AesRcon[4*(row/Nk)+2] );
temp[3] = (byte)( (int)temp[3] ^ (int) AesRcon[4*(row/Nk)+3] );
}
else if ( Nk > 6 && (row % Nk == 4卡塔尔(英语:State of Qatar) 卡塔尔 //这么些还并没有搞理解
{
temp = SubWord(temp);
}

void AES::ShiftRows(unsigned char state[][4])
{
unsigned char t[4];
int r,c;
for(r=1; r<4; r++)
{
for(c=0; c<4; c++)
{
t[c] = state[r][(c+r)%4];
}
for(c=0; c<4; c++)
{
state[r][c] = t[c];
}
}
}

AddRoundKey(state, w[10]);
for(i=9; i>=0; i--)
{
InvShiftRows(state);
InvSubBytes(state);
AddRoundKey(state, w[i]);
if(i)
{
InvMixColumns(state);
}
}

 

AES::AES(unsigned char* key)
{
unsigned char sBox[] =
{ /* 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*/
};
unsigned char invsBox[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, /*0*/
0x7c,0xe3,0x39,0x82,0x9b,0x2f,0xff,0x87,0x34,0x8e,0x43,0x44,0xc4,0xde,0xe9,0xcb, /*1*/
0x54,0x7b,0x94,0x32,0xa6,0xc2,0x23,0x3d,0xee,0x4c,0x95,0x0b,0x42,0xfa,0xc3,0x4e, /*2*/
0x08,0x2e,0xa1,0x66,0x28,0xd9,0x24,0xb2,0x76,0x5b,0xa2,0x49,0x6d,0x8b,0xd1,0x25, /*3*/
0x72,0xf8,0xf6,0x64,0x86,0x68,0x98,0x16,0xd4,0xa4,0x5c,0xcc,0x5d,0x65,0xb6,0x92, /*4*/
0x6c,0x70,0x48,0x50,0xfd,0xed,0xb9,0xda,0x5e,0x15,0x46,0x57,0xa7,0x8d,0x9d,0x84, /*5*/
0x90,0xd8,0xab,0x00,0x8c,0xbc,0xd3,0x0a,0xf7,0xe4,0x58,0x05,0xb8,0xb3,0x45,0x06, /*6*/
0xd0,0x2c,0x1e,0x8f,0xca,0x3f,0x0f,0x02,0xc1,0xaf,0xbd,0x03,0x01,0x13,0x8a,0x6b, /*7*/
0x3a,0x91,0x11,0x41,0x4f,0x67,0xdc,0xea,0x97,0xf2,0xcf,0xce,0xf0,0xb4,0xe6,0x73, /*8*/
0x96,0xac,0x74,0x22,0xe7,0xad,0x35,0x85,0xe2,0xf9,0x37,0xe8,0x1c,0x75,0xdf,0x6e, /*9*/
0x47,0xf1,0x1a,0x71,0x1d,0x29,0xc5,0x89,0x6f,0xb7,0x62,0x0e,0xaa,0x18,0xbe,0x1b, /*a*/
0xfc,0x56,0x3e,0x4b,0xc6,0xd2,0x79,0x20,0x9a,0xdb,0xc0,0xfe,0x78,0xcd,0x5a,0xf4, /*b*/
0x1f,0xdd,0xa8,0x33,0x88,0x07,0xc7,0x31,0xb1,0x12,0x10,0x59,0x27,0x80,0xec,0x5f, /*c*/
0x60,0x51,0x7f,0xa9,0x19,0xb5,0x4a,0x0d,0x2d,0xe5,0x7a,0x9f,0x93,0xc9,0x9c,0xef, /*d*/
0xa0,0xe0,0x3b,0x4d,0xae,0x2a,0xf5,0xb0,0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61, /*e*/
0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26,0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d /*f*/
};
memcpy(Sbox, sBox, 256);
memcpy(InvSbox, invsBox, 256);
KeyExpansion(key, w);
}

}
void Aes::InvMixColumns()
{
unsigned char temp[4*4];
int i,j;
for (i = 0; i < 4; i++) // copy State into temp[]
{
for (j = 0; j < 4; j++卡塔尔(英语:State of Qatar) //0e 0b 0d 09 逆袭变矩阵 Page108
{ //09 0e 0b 0d
temp[4*i+j] = State[i][j]; //0d 09 0e 0b
} //0b 0d 09 0e
}

SubBytes(卡塔尔; //字节代换
ShiftRows(); //行移位
AddRoundKey(Nr卡塔尔国; //轮密钥加

BYTE input1[16];
BYTE output1[16];

}

unsigned char Aes::gfmultby0e(unsigned char b)
{
return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
(int)gfmultby02(gfmultby02(b)) ^(int)gfmultby02(b) );
}
////////////////////////////////////////////////////////////////////////////////////////////////
//多字符串加密函数最大256字节
void Aes::CipherAny(unsigned char* input,unsigned char* output)//unsigned char* output
{
int blocknum=0,ByteLen,blockend=0;
ByteLen = strlen((char *)input);

#include "stdafx.h"
#include "string.h"
#include "AES.h"

void AES::InvSubBytes(unsigned char state[][4])
{
int r,c;
for(r=0; r<4; r++)
{
for(c=0; c<4; c++)
{
state[r][c] = InvSbox[state[r][c]];
}
}
}

if(ByteLen>16)
{
blocknum = ByteLen/16;//得到商作为i的巡回
blockend = ByteLen%16;//得到余数作为最后加密位数
for (int i=0;i<blocknum;i++)
{
InvCipher(input,output);
input=input+16;
www.xpj68.com,output=output+16;
}
if (blockend)
{
InvCipher(input,output);
}
}
else
{
InvCipher(input,output);
}
}

void print(unsigned char* state);

void Split(CString source, CStringArray& dest, CString division卡塔尔(英语:State of Qatar);//字符串分割函数

void SetNbNkNr(int keySize);
void AddRoundKey(int round卡塔尔(قطر‎; //轮密钥加
void SubBytes(卡塔尔国; //S盒字节代换
void InvSubBytes(卡塔尔(英语:State of Qatar); //逆S盒字节代换
void ShiftRows(); //行移位
void InvShiftRows();
void MixColumns(); //列混淆
void InvMixColumns();
unsigned char gfmultby01(unsigned char b);
unsigned char gfmultby02(unsigned char b);
unsigned char gfmultby03(unsigned char b);
unsigned char gfmultby09(unsigned char b);
unsigned char gfmultby0b(unsigned char b);
unsigned char gfmultby0d(unsigned char b);
unsigned char gfmultby0e(unsigned char b);
void KeyExpansion(卡塔尔; //密钥扩大
unsigned char* SubWord(unsigned char* word卡塔尔国; //密钥S盒字代换
unsigned char* RotWord(unsigned char* word卡塔尔国; //密钥移位
//Dump();
//DumpKey();
// DumpTwoByTwo(char* a);
public:
void CipherAny(unsigned char* input,unsigned char* output);
void InvCipherAny(unsigned char* input,unsigned char* output);//unsigned char* output

}

void AES::KeyExpansion(unsigned char* key, unsigned char w[][4][4])
{
int i,j,r,c;
unsigned char rc[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36};
for(r=0; r<4; r++)
{
for(c=0; c<4; c++)
{
w[0][r][c] = key[r+c*4];
}
}
for(i=1; i<=10; i++)
{
for(j=0; j<4; j++)
{
unsigned char t[4];
for(r=0; r<4; r++)
{
t[r] = j ? w[i][r][j-1] : w[i-1][r][3];
}
if(j == 0)
{
unsigned char temp = t[0];
for(r=0; r<3; r++)
{
t[r] = Sbox[t[(r+1)%4]];
}
t[3] = Sbox[temp];
t[0] ^= rc[i-1];
}
for(r=0; r<4; r++)
{
w[i][r][j] = w[i-1][r][j] ^ t[r];
}
}
}
}

class AES
{
public:
AES(unsigned char* key);
virtual ~AES();
unsigned char* Cipher(unsigned char* input);
unsigned char* InvCipher(unsigned char* input);
void* Cipher(void* input, int length=0);
void* InvCipher(void* input, int length);

}

#endif // !defined(AFX_AES_H__6BDD3760_BDE8_4C42_85EE_6F7A434B81C4__INCLUDED_)

void* AES::Cipher(void* input, int length)
{
unsigned char* in = (unsigned char*) input;
int i;
if(!length)
{
while(*(in+length++));
in = (unsigned char*) input;
}
for(i=0; i<length; i+=16)
{
Cipher(in+i);
}
return input;
}

class AES
{
public:
AES(unsigned char* key);
virtual ~AES();
unsigned char* Cipher(unsigned char* input);
unsigned char* InvCipher(unsigned char* input);
void* Cipher(void* input, int length=0);
void* InvCipher(void* input, int length);

}
void Aes::InvShiftRows()
{
unsigned char temp[4*4];
int i,j;
for(j=0;j<4;j++)
{
for(i=0;i<4;i++)
{
temp[4*i+j]=State[i][j];
}
}
for(i=1;i<4;i++)
{
for(j=0;j<4;j++)
{
//if(i==1)State[i][j]=temp[4*i+(j-1)%4]; 在这里犯了贰个错误 -1%4=-1 并非3,所以接收了下边再加二个4的做法
if(i==1)State[i][j]=temp[4*i+(j+3)%4]; //第黄金时代行右移1位 j-1+4=j+3
else if(i==2)State[i][j]=temp[4*i+(j+2)%4]; //第二行右移2位 j-2+4=j+2
else if(i==3)State[i][j]=temp[4*i+(j+1)%4]; //第三行右移3位 j-3+4=j+2
}
}

for(r=0; r<4; r++)
{
for(c=0; c<4 ;c++)
{
input[c*4+r] = state[r][c];
}
}

UINT iMeg=nSend/16,i,j=0;
while(iMeg)
{
i=0;
for(j=16*(nSend/16-iMeg);j<16*(nSend/16-iMeg+1);j++)
{
input1[i]=pByte[j];
i++;
}
aes.Cipher(input1,output1);
for(i=0;i<16;i++)
{
str.Format("x%x",output1[i]);
strSend+=str;
}
iMeg--;
}
if(nSend%16!=0)
{
for(i=0;i<16;i++)
{
if(i<nSend%16)
{
input1[i]=pByte[j];
j++;
}
else
input1[i]=0x0;
}
aes.Cipher(input1,output1);
for(i=0;i<16;i++)
{
str.Format("x%x",output1[i]);
strSend+=str;//最后密文
}
}
int preLen = strSend.GetLength()+1;
memcpy(outPut, (LPCTSTR)strSend, preLen);
}

 

void AES::SubBytes(unsigned char state[][4])
{
int r,c;
for(r=0; r<4; r++)
{
for(c=0; c<4; c++)
{
state[r][c] = Sbox[state[r][c]];
}
}
}

aes.InvCipherByte(KeyValue, inBuff, (lFileLen+1), ouBuff);
CString strSend;//发送数据
strSend.Format("%s",ouBuff);
int inBuffLen = strlen(ouBuff);
fwrite(ouBuff,1,inBuffLen,foutput);

unsigned char* AES::Cipher(unsigned char* input)
{
unsigned char state[4][4];
int i,r,c;

 

unsigned char* AES::InvCipher(unsigned char* input)
{
unsigned char state[4][4];
int i,r,c;

// BYTE key[16]={0x12,0x44,0x56,0x38,0x55,0x82,0x56,0x85,0x23,0x25,0x56,0x45,0x52,0x47,0x45,0x86};
// Aes aes(24,key);

void AES::AddRoundKey(unsigned char state[][4], unsigned char k[][4])
{
int r,c;
for(c=0; c<4; c++)
{
for(r=0; r<4; r++)
{
state[r][c] ^= k[r][c];
}
}
}

private:
unsigned char Sbox[256];
unsigned char InvSbox[256];
unsigned char w[11][4][4];

}

#endif // !defined(AFX_AES_H__6BDD3760_BDE8_4C42_85EE_6F7A434B81C4__INCLUDED_)

static unsigned char AesiSbox[16*16]=
{
// populate the iSbox matrix
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
/*0*/ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
/*1*/ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
/*2*/ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
/*3*/ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
/*4*/ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
/*5*/ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
/*6*/ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
/*7*/ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
/*8*/ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
/*9*/ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
/*a*/ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
/*b*/ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
/*c*/ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
/*d*/ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
/*e*/ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
/*f*/ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
};
static unsigned char AesRcon[11*4]=
{
0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00,
0x04, 0x00, 0x00, 0x00,
0x08, 0x00, 0x00, 0x00,
0x10, 0x00, 0x00, 0x00,
0x20, 0x00, 0x00, 0x00,
0x40, 0x00, 0x00, 0x00,
0x80, 0x00, 0x00, 0x00,
0x1b, 0x00, 0x00, 0x00,
0x36, 0x00, 0x00, 0x00
};

void* AES::InvCipher(void* input, int length)
{
unsigned char* in = (unsigned char*) input;
int i;
for(i=0; i<length; i+=16)
{
InvCipher(in+i);
}
return input;
}

unsigned char key[32];
unsigned char w[16*15];

delete inBuff;
delete ouBuff;
fclose(finput);
fclose(foutput);
}
/////////////////////////////////////////////////////
//解密文件
//KeyValue:解密KEY值
//inBuffFile:待解密的文件名(含文件路线)
//outBuffFile:解密后文件的保留名称(含文件路线)
void Aes::InvCipherFile(CString KeyValue, char* inBuffFile, char* outBuffFile)
{
Aes aes;
CString EnDe_filename;
EnDe_filename = inBuffFile;
if(EnDe_filename=="")return;
FILE* finput;
FILE* foutput;
finput=fopen((LPCTSTR)EnDe_filename,"rb");
if(!finput)
{
return;
}
fseek(finput,0,SEEK_END);
long lFileLen=ftell(finput卡塔尔(英语:State of Qatar); //ftell(卡塔尔(英语:State of Qatar)函数重临文件地方提示符的当前值,即假设未来是在文书结尾,则那些值就是文本长度
fseek(finput,0,SEEK_SET);
long blocknum=lFileLen/16;
long leftnum=lFileLen%16;
EnDe_filename = outBuffFile;
foutput=fopen((LPCTSTR)EnDe_filename,"wb");
if(!foutput)
{
fclose(finput);
return;
}

}
////////////////////////////////////////////////////////////////////////////////////////////////
void Aes::ShiftRows()
{
unsigned char temp[4*4]; //Page105
int i,j;
for(j=0;j<4;j++)
{
for(i=0;i<4;i++)
{
temp[4*i+j]=State[i][j];
}
}
for(i=1;i<4;i++)
{
for(j=0;j<4;j++)
{
if(i==1)State[i][j]=temp[4*i+(j+1)%4]; //第生机勃勃行左移1位
else if(i==2)State[i][j]=temp[4*i+(j+2)%4]; //第二行左移2位
else if(i==3)State[i][j]=temp[4*i+(j+3)%4]; //第三行左移3位
}
}

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

 

if(ByteLen>16)
{
blocknum = ByteLen/16;//拿到商作为i的巡回
blockend = ByteLen%16;//得到余数作为最终加密位数
for (int i=0;i<blocknum;i++)
{
Cipher(input,output);
input=input+16;
output=output+16;
}
if (blockend)
{
Cipher(input,output);
}
}
else
{
Cipher(input,output);
}
}

void CipherFile(CString KeyValue, char* inBuff, char* outBuff卡塔尔;//加密文件
void InvCipherFile(CString KeyValue, char* inBuff, char* outBuff卡塔尔国;//解密文件
public:
int keysize;
};

unsigned char Aes::gfmultby0d(unsigned char b)
{
return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
(int)gfmultby02(gfmultby02(b)) ^ (int)(b) );
}

void KeyExpansion(unsigned char* key, unsigned char w[][4][4]);
unsigned char FFmul(unsigned char a, unsigned char b);

void SubBytes(unsigned char state[][4]);
void ShiftRows(unsigned char state[][4]);
void MixColumns(unsigned char state[][4]);
void AddRoundKey(unsigned char state[][4], unsigned char k[][4]);

unsigned char Aes::gfmultby03(unsigned char b)
{
return (unsigned char) ( (int)gfmultby02(b) ^ (int)b );
}

delete inBuff;
delete ouBuff;
fclose(finput);
fclose(foutput);
}

//解密256字节的函数
void Aes::InvCipherAny(unsigned char* input,unsigned char* output)//unsigned char* output
{
int blocknum=0,ByteLen,blockend=0;
ByteLen = strlen((char *)input);

cpp文件:
#include "StdAfx.h" //注目的在于这 #include "Aes.h"不得以献身日前,不然出错,
#include "Aes.h"
Aes::~Aes()
{

// output = state
for (int i = 0; i < (4 * Nb); i++)
{
output[i] = State[i % 4][ i / 4];
}

#include <windows.h>
#define Bits128 16
#define Bits192 24
#define Bits256 32

}
Aes::Aes()
{

#include "stdafx.h"

static unsigned char AesSbox[16*16]=
{// populate the Sbox matrix
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
/*0*/ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
/*1*/ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
/*2*/ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
/*3*/ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
/*4*/ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
/*5*/ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
/*6*/ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
/*7*/ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
/*8*/ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
/*9*/ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
/*a*/ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
/*b*/ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
/*c*/ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
/*d*/ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
/*e*/ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
/*f*/ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
};

AddRoundKey(state,w[0]);

int iMeg=(lenx-1)/16,i,j=0,k=0;
while(iMeg)
{
i=0;
for(j=16*((lenx-1)/16-iMeg);j<16*((lenx-1)/16-iMeg+1);j++)
{

}

input1[i]=(unsigned char)strtol(dest[j],NULL,16);
i++;
}
aes.InvCipher(input1,output1);
for(i=0;i<16;i++)
{
outPut[k]=(char)output1[i];
k++;
}
iMeg--;
}
}
//////////////////////////////////////////////////////////////////////////////////////
//KEY值设置
VOID Aes::set_key(int KeySize,UCHAR *KeyBytes)
{
SetNbNkNr(keysize卡塔尔(قطر‎; //设置密钥块数,轮数
memcpy(key, KeyBytes, keysize卡塔尔(英语:State of Qatar); //字符串拷贝函数,把keyBytes的keysize个字符复制到key中
KeyExpansion(卡塔尔国; //密钥扩大,必需提前做的最初化

 

InvShiftRows();
InvSubBytes();
AddRoundKey(0);

#include "stdafx.h"

void KeyExpansion(unsigned char* key, unsigned char w[][4][4]);
unsigned char FFmul(unsigned char a, unsigned char b);

void print(unsigned char* state)
{
int i;
for(i=0; i<16; i++)
{
printf("%s%X ",state[i]>15 ? "" : "0", state[i]);
}
printf("n");
}

void CipherByte(CString KeyValue, char *input,UINT nSend,char * outPut卡塔尔国;//加密字符串
void InvCipherByte(CString KeyValue, char *input,UINT nSend,char * outPut卡塔尔国;//解密字符串

// w[row] = w[row-Nk] xor temp
w[4*row+0] = (byte) ( (int) w[4*(row-Nk)+0] ^ (int)temp[0] );
w[4*row+1] = (byte) ( (int) w[4*(row-Nk)+1] ^ (int)temp[1] );
w[4*row+2] = (byte) ( (int) w[4*(row-Nk)+2] ^ (int)temp[2] );
w[4*row+3] = (byte) ( (int) w[4*(row-Nk)+3] ^ (int)temp[3] );
} // for loop

memcpy(pByte,strSend.GetBuffer(0),nSend);
strSend="";

void AES::MixColumns(unsigned char state[][4])
{
unsigned char t[4];
int r,c;
for(c=0; c< 4; c++)
{
for(r=0; r<4; r++)
{
t[r] = state[r][c];
}
for(r=0; r<4; r++)
{
state[r][c] = FFmul(0x02, t[r])
^ FFmul(0x03, t[(r+1)%4])
^ FFmul(0x01, t[(r+2)%4])
^ FFmul(0x01, t[(r+3)%4]);
}
}
}

//////////////////////////////////////////////
//加密文件
//KeyValue:加密KEY值
//inBuffFile:待加密的文书名(含文件路线)
//outBuffFile:加密后文件的保存名称(含文件路线)
void Aes::CipherFile(CString KeyValue, char* inBuffFile, char* outBuffFile)
{
Aes aes;
CString EnDe_filename;
EnDe_filename = inBuffFile;
if(EnDe_filename=="")return;
FILE* finput;
FILE* foutput;
finput=fopen((LPCTSTR)EnDe_filename,"rb");
if(!finput)
{
return;
}
fseek(finput,0,SEEK_END);
long lFileLen=ftell(finput卡塔尔国; //ftell(卡塔尔国函数重回文件地方提示符的眼下值,即只要前几天是在文书结尾,则这些值正是文件长度
fseek(finput,0,SEEK_SET);
long blocknum=lFileLen/16;
long leftnum=lFileLen%16;
EnDe_filename = outBuffFile;
foutput=fopen((LPCTSTR)EnDe_filename,"wb");
if(!foutput)
{
fclose(finput);
return;
}
char *inBuff = new char [lFileLen+1];
char *ouBuff = new char[(lFileLen/16+1)*48+1];

aes.CipherByte(KeyValue, inBuff, (lFileLen+1), ouBuff);
CString strSend;//发送数据
strSend.Format("%s",ouBuff);
int ouBuffLen = strlen(strSend);
fwrite(ouBuff,1,ouBuffLen,foutput);

for(r=0; r<4; r++)
{
for(c=0; c<4 ;c++)
{
input[c*4+r] = state[r][c];
}
}

int lenx=dest.GetSize();

for (int round = Nr-1; round >= 1; round--) // main round loop
{
InvShiftRows();
InvSubBytes();
AddRoundKey(round);
InvMixColumns();
} // end main round loop for InvCipher

// BYTE key[16]={0x12,0x44,0x56,0x38,0x55,0x82,0x56,0x85,0x23,0x25,0x56,0x45,0x52,0x47,0x45,0x86};
// Aes aes(24,key);

void InvSubBytes(unsigned char state[][4]);
void InvShiftRows(unsigned char state[][4]);
void InvMixColumns(unsigned char state[][4]);
};

class Aes // Advanced Encryption Standard
{
public:
~Aes();
Aes();
Aes(int keySize, unsigned char* keyBytes);
unsigned char State[4][4];
void Cipher(unsigned char* input, unsigned char* output); // encipher 16-bit input
void InvCipher(unsigned char* input, unsigned char* output); // decipher 16-bit input
private:
int Nb; // block size in 32-bit words. Always 4 for AES. (128 bits).
int Nk; // key size in 32-bit words. 4, 6, 8. (128, 192, 256 bits).
int Nr; // number of rounds. 10, 12, 14.

char *inBuff = new char [lFileLen + 1];
char *ouBuff = new char[(lFileLen/16+1)*48+1];
fread(inBuff,1,lFileLen,finput);
inBuff[lFileLen] = '';

for(i=1; i<=10; i++)
{
SubBytes(state);
ShiftRows(state);
if(i!=10)MixColumns(state);
AddRoundKey(state,w[i]);
}

void AES::InvShiftRows(unsigned char state[][4])
{
unsigned char t[4];
int r,c;
for(r=1; r<4; r++)
{
for(c=0; c<4; c++)
{
t[c] = state[r][(c-r+4)%4];
}
for(c=0; c<4; c++)
{
state[r][c] = t[c];
}
}
}

//////////////////////////////////////////////////////////////////////////////////////
//字符串加密函数(可加密猖狂长度字符串)
//KeyValue:加密KEY值
//input:待加密的字符串
//outPut:加密后的字符串
void Aes::CipherByte(CString KeyValue, char *input,UINT nSend,char * outPut)
{
int length=strlen(KeyValue);
unsigned char str1[33];
strcpy((char *)str1,(LPSTR)(LPCTSTR)KeyValue);
if (length<=16&&length>0)keysize=16;
else if(length<=24&&length>16)keysize=24;
else if(length>24&&length<=32)keysize=32;
Aes aes(keysize,str1);

void AES::InvMixColumns(unsigned char state[][4])
{
unsigned char t[4];
int r,c;
for(c=0; c< 4; c++)
{
for(r=0; r<4; r++)
{
t[r] = state[r][c];
}
for(r=0; r<4; r++)
{
state[r][c] = FFmul(0x0e, t[r])
^ FFmul(0x0b, t[(r+1)%4])
^ FFmul(0x0d, t[(r+2)%4])
^ FFmul(0x09, t[(r+3)%4]);
}
}
}

void SubBytes(unsigned char state[][4]);
void ShiftRows(unsigned char state[][4]);
void MixColumns(unsigned char state[][4]);
void AddRoundKey(unsigned char state[][4], unsigned char k[][4]);

///////////////////////////////////////////////////
//分割函数
//source:待分割的字符串
//dest:分割字符串后缓存到dest数组
//division:分割关键字
void Aes::Split(CString source, CStringArray& dest, CString division)
{
int len=source.GetLength();
dest.RemoveAll();
int pos = 0;
int pre_pos = 0;
while( -1 != pos )
{
pre_pos = pos+1;
pos = source.Find(division,(pos+1));
if(-1==pos)
dest.Add(source.Mid(pre_pos,(len-pre_pos)));
dest.Add(source.Mid(pre_pos,(pos-pre_pos)));
}

unsigned char Aes::gfmultby0b(unsigned char b)
{
return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^
(int)gfmultby02(b) ^ (int)b );
}

int main(int argc, char* argv[])
{
unsigned int a;
unsigned int b;
unsigned char input[16];
unsigned char key[16];
char name;
printf("Cipher(c) or InvCipher(i)?n");
scanf("%c",&name);
if (name=='c')
{
printf("Please input M:n");
for (int i=0;i<16;i++)
{
scanf ("%x",&a);
input[i]=a;
}
printf("Please input K:n");
for (int ii=0;ii<16;ii++)
{
scanf("%x",&b);
key[ii]=b;
}
AES aes(key);
aes.Cipher(input);
printf("After Cipher(C):n");
print(input);
}
if (name =='i')
{
printf("Please input C:n");
for (int i=0;i<16;i++)
{
scanf ("%x",&a);
input[i]=a;
}
printf("Please input K:n");
for (int ii=0;ii<16;ii++)
{
scanf("%x",&b);
key[ii]=b;
}
AES aes(key);
aes.InvCipher(input);
printf("After InvCipher(M):n");
print(input);
}
return 0;

for (int round = 1; round <= (Nr - 1); round++) // main round loop
{
SubBytes(卡塔尔; //字节代换
ShiftRows(); //行移位
MixColumns(); //列混淆
AddRoundKey(round卡塔尔(قطر‎; //轮密钥加
} // main round loop

}
}
}
void Aes::InvSubBytes()
{
int i,j;
for(j=0;j<4;j++)
{
for(i=0;i<4;i++)
{
State[i][j]=AesiSbox[State[i][j]]; //因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]
}
}

CStringArray dest;
Split(strSend, dest,"x");

unsigned char AES::FFmul(unsigned char a, unsigned char b)
{
unsigned char bw[4];
unsigned char res=0;
int i;
bw[0] = b;
for(i=1; i<4; i++)
{
bw[i] = bw[i-1]<<1;
if(bw[i-1]&0x80)
{
bw[i]^=0x1b;
}
}
for(i=0; i<4; i++)
{
if((a>>i)&0x01)
{
res ^= bw[i];
}
}
return res;
}

int char2num(char ch);
void set_key(int KeySize,UCHAR *KeyBytes);

return input;
}

for(r=0; r<4; r++)
{
for(c=0; c<4 ;c++)
{
state[r][c] = input[c*4+r];
}
}

#if !defined(AFX_AES_H__6BDD3760_BDE8_4C42_85EE_6F7A434B81C4__INCLUDED_)
#define AFX_AES_H__6BDD3760_BDE8_4C42_85EE_6F7A434B81C4__INCLUDED_

 

// output = state
for (int i = 0; i < (4 * Nb); i++)
{
output[i] = State[i % 4][ i / 4];
}
}
////////////////////////////////////////////////////////////////////////////////////////////////
//轮密钥加
void Aes::AddRoundKey(int round)
{
int i,j; //i行 j列 //因为密钥w是一列一列排列的,即 k0 k4 k8 k12
for(j=0;j<4;j++) // k1 k5 k9 k13
{ // k2 k6 k10k14
for(i=0;i<4;i++) // k3 k7 k11k15
{ // 所以i行j列的下标是4*((round*4)+j)+i即16*round+4*j+i
State[i][j]=(unsigned char)((int)State[i][j]^(int)w[4*((round*4)+j)+i]);
}
}
}
////////////////////////////////////////////////////////////////////////////////////////////////
//字节代换函数
void Aes::SubBytes() //Page 103
{
int i,j;
for(j=0;j<4;j++)
{
for(i=0;i<4;i++)
{
State[i][j]=AesSbox[State[i][j]];
//因为 16*(State[i][j]>>4)+State[i][j]&0x0f=State[i][j]

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

AddRoundKey(Nr);

return input;
}

AES::~AES()
{

 

}
////////////////////////////////////////////////////////////////////////////////////////////////
void Aes::MixColumns()
{
unsigned char temp[4*4];
int i,j;
for(j=0;j<4;j++卡塔尔国 //2 3 1 1 列混淆矩阵 Page107
{ //1 2 3 1
for(i=0;i<4;i++) //1 1 2 3
{ //3 1 1 2
temp[4*i+j]=State[i][j];
}
}
for(j=0;j<4;j++)
{
State[0][j] = (unsigned char) ( (int)gfmultby02(temp[0+j]) ^ (int)gfmultby03(temp[4*1+j]) ^
(int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
State[1][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby02(temp[4*1+j]) ^
(int)gfmultby03(temp[4*2+j]) ^ (int)gfmultby01(temp[4*3+j]) );
State[2][j] = (unsigned char) ( (int)gfmultby01(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
(int)gfmultby02(temp[4*2+j]) ^ (int)gfmultby03(temp[4*3+j]) );
State[3][j] = (unsigned char) ( (int)gfmultby03(temp[0+j]) ^ (int)gfmultby01(temp[4*1+j]) ^
(int)gfmultby01(temp[4*2+j]) ^ (int)gfmultby02(temp[4*3+j]) );
}

}
////////////////////////////////////////////////////////////////////////////////////////////////
//Aes加密函数(对文本加密能够调用该函数卡塔尔(قطر‎
void Aes::Cipher(unsigned char* input, unsigned char* output)
{
memset(&State[0][0],0,16);
for(int i=0;i<4*Nb;i++卡塔尔国//这里是先写列后写行的,即输入是一列一列的步入的
{
State[i%4][i/4]=input[i]; //换到先写行后写列也是足以的,只要在输出时也是如此就能够了
}
AddRoundKey(0卡塔尔(قطر‎; //轮密钥加

private:
unsigned char Sbox[256];
unsigned char InvSbox[256];
unsigned char w[11][4][4];

unsigned char Aes::gfmultby09(unsigned char b)
{
return (unsigned char)( (int)gfmultby02(gfmultby02(gfmultby02(b))) ^ (int)b );
}

fread(inBuff,1,lFileLen,finput);
inBuff[lFileLen] = '';

 

}
////////////////////////////////////////////////////////////////////////////////////////////////
//密钥移位函数
unsigned char* Aes::RotWord(unsigned char* word)
{
byte* temp = new byte[4];
temp[0] = word[1];
temp[1] = word[2];
temp[2] = word[3];
temp[3] = word[0];
return temp;
}
////////////////////////////////////////////////////////////////////////////////////////////////
//密钥字代换函数
unsigned char* Aes::SubWord(unsigned char* word)
{
byte* temp = new byte[4];
for(int j=0;j<4;j++)
{
temp[j] = AesSbox[16*(word[j] >> 4)+(word[j] & 0x0f)]; //实际上也足以写成AesSbox[[j]];因为两岸对等
}
return temp;

#if !defined(AFX_AES_H__6BDD3760_BDE8_4C42_85EE_6F7A434B81C4__INCLUDED_)
#define AFX_AES_H__6BDD3760_BDE8_4C42_85EE_6F7A434B81C4__INCLUDED_

CString strSend,str;
strSend.Format("%s",input);
BYTE *pByte=new BYTE[nSend] ;

本文由澳门新葡亰娱乐场发布于www.xpj68.com,转载请注明出处:AES MFC实现

关键词:

上一篇:UK内部UX团队管理

下一篇:没有了

频道精选

最火资讯