AES加密算法的C++实现过程(17500字)

来源:m.fanwen118.com时间:2021.1.11

//AES.H

#ifndef _AES_H_

#define _AES_H_

#include"stdafx.h"

#define AES_KEY_ROW_NUMBER 4

#define AES_KEY_COLUMN_NUMBER 4

#define AES_ROUND_COUNT 10

class AES : public Encryption

{

public:

AES(void);

AES(BYTE* key);

virtual ~AES(void);

void Encrypt(BYTE *, BYTE *,size_t);

void Decrypt(BYTE *, BYTE *,size_t);

private:

BYTE swapbox[11][4][4];

BYTE* Cipher(BYTE* input);

BYTE* InvCipher(BYTE* input);

BYTE* Cipher(void * input, size_t length);

BYTE* InvCipher(void * input, size_t length);

voidKeyExpansion(BYTE* key, BYTE w[][4][AES_KEY_COLUMN_NUMBER]);

BYTE FFmul(BYTE a, BYTE b);

voidSubBytes(BYTE state[][AES_KEY_COLUMN_NUMBER]);

voidShiftRows(BYTE state[][AES_KEY_COLUMN_NUMBER]);

voidMixColumns(BYTE state[][AES_KEY_COLUMN_NUMBER]);

voidAddRoundKey(BYTE state[][AES_KEY_COLUMN_NUMBER], BYTE k[][AES_KEY_COLUMN_NUMBER]);

voidInvSubBytes(BYTE state[][AES_KEY_COLUMN_NUMBER]);

voidInvShiftRows(BYTE state[][AES_KEY_COLUMN_NUMBER]);

voidInvMixColumns(BYTE state[][AES_KEY_COLUMN_NUMBER]);

};

#endif// _AES_H_

//Encryption.h

#ifndef _ENCRYPTION_H_

#define _ENCRYPTION_H_

#include"stdafx.h"

class Encryption

{

public:

virtualvoid Encrypt(BYTE *, BYTE *,size_t) = 0;

virtualvoid Decrypt(BYTE *, BYTE *,size_t) = 0;

};

#endif

//EncryptionFactory.h

#ifndef _ENCRYPTION_FACTORY_H_

#define _ENCRYPTION_FACTORY_H_

#include"Encryption.h"

#include"stdafx.h"

classEncryptionFactory

{

public:

EncryptionFactory(void);

virtual ~EncryptionFactory(void);

static Encryption* getEncryption(intencryptionType,BYTE* key);

private :

static Encryption* encry;

};

#endif

//AES.cpp

#include"stdafx.h"

#include"AES.h"

#include<stdlib.h>

#include<memory.h>

//permutebox

staticunsignedcharpermutebox[] =

{ /* 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*/

};

//inversepermutationbox

static unsignedcharinversepermutationbox[]=

{ /* 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*/

};

AES::AES(void)

{

}

AES::AES(unsignedchar* key)

{

KeyExpansion(key, swapbox);

}

AES::~AES(void)

{

}

/************************************************************************/

/* create a Encrypt method */

/* param : data encrypt data */

/* param :encryptArrayencryptArray */

/* param :len encrypt data length */

/* return : void */

/************************************************************************/

void AES::Encrypt(unsignedchar* data ,unsignedchar * encryptArray,size_tlen)

{

memcpy(encryptArray,data,len);

Cipher((void *)encryptArray,len);

}

/************************************************************************/

/* create a Decrypt method */

/* param : data decrypt data */

/* param :decryptArraydecryptArray */

/* param :len decrypt data length */

/* return : void */

/************************************************************************/

void AES::Decrypt(unsignedchar * data,unsignedchar * decryptArray,size_tlen)

{

memcpy(decryptArray,data,len);

InvCipher((void *)decryptArray,len);

}

/************************************************************************/ /* create a Cipher method only one time Encrypt */ /* param : input input encrypt data */ /* return : unsigned char * */ /************************************************************************/

unsignedchar* AES::Cipher(unsignedchar* input)

{

unsignedchar state[AES_KEY_ROW_NUMBER][AES_KEY_COLUMN_NUMBER]; inti,r,c;

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER ;c++)

{

state[r][c] = input[c*AES_KEY_COLUMN_NUMBER+r];

}

}

AddRoundKey(state,swapbox[0]);

for(i=1; i<=AES_ROUND_COUNT; i++)

{

SubBytes(state);

ShiftRows(state);

if(i!=AES_ROUND_COUNT)MixColumns(state);

AddRoundKey(state,swapbox[i]);

}

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER ;c++)

{

input[c*AES_KEY_COLUMN_NUMBER+r] = state[r][c];

}

}

return input;

}

/************************************************************************/ /* create a InvCipher method only one time decrypt */ /* param : input input decrypt data */ /* return : unsigned char * */ /************************************************************************/ unsignedchar* AES::InvCipher(unsignedchar* input)

{

unsignedchar state[AES_KEY_ROW_NUMBER][AES_KEY_COLUMN_NUMBER]; inti,r,c;

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER ;c++)

{

state[r][c] = input[c*AES_KEY_COLUMN_NUMBER+r];

}

}

AddRoundKey(state, swapbox[10]);

for(i=9; i>=0; i--)

{

InvShiftRows(state);

InvSubBytes(state);

AddRoundKey(state, swapbox[i]);

if(i)

{

InvMixColumns(state);

}

}

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER ;c++)

{

input[c*AES_KEY_COLUMN_NUMBER+r] = state[r][c];

}

}

return input;

}

/************************************************************************/ /* Create a specified length of data encryption method */ /* param : input input data encryption */ /* param : length Input the length of the encrypted data */ /* return : unsigned char * */ /************************************************************************/ unsignedchar* AES::Cipher(void * input, size_t length)

{

unsignedchar* in = (unsignedchar*) input;

size_t i;

if(!length)

{

while(*(in+length++));

in = (unsignedchar*) input;

}

for(i=0; i<length; i+=16)

{

Cipher(in+i);

}

return (unsignedchar*)input;

}

/************************************************************************/ /* Create a specified length of InvCipher method */ /* param : input input data InvCipher */

/* param : length Input the length of the InvCipher data */

/* return : unsigned char * */

/************************************************************************/

unsignedchar* AES::InvCipher(void * input, size_t length)

{

unsignedchar* in = (unsignedchar*) input;

size_t i;

for(i=0; i<length; i+=16)

{

InvCipher(in+i);

}

return (unsignedchar*)input;

}

/************************************************************************/

/*Create key method */

/* param : key input data encryption key */

/* param :swapbox Conversion of key array */

/* return : void */

/************************************************************************/

void AES::KeyExpansion(unsignedchar* key, unsignedcharswapbox[][4][4])

{

inti,j,r,c;

unsignedcharrc[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36}; for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

swapbox[0][r][c] = key[r+c*AES_KEY_COLUMN_NUMBER];

}

}

for(i=1; i<=10; i++)

{

for(j=0; j<AES_KEY_COLUMN_NUMBER; j++)

{

unsignedchar t[AES_KEY_ROW_NUMBER];

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

t[r] = j ? swapbox[i][r][j-1] : swapbox[i-1][r][3];

}

if(j == 0)

{

unsignedchar temp = t[0];

for(r=0; r<AES_KEY_ROW_NUMBER-1; r++)

{

t[r] = permutebox[t[(r+1)%AES_KEY_ROW_NUMBER]];

}

t[3] = permutebox[temp];

t[0] ^= rc[i-1];

}

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

swapbox[i][r][j] = swapbox[i-1][r][j] ^ t[r];

}

}

}

}

/************************************************************************/ /*Create mixed operation method ranks */ /* param : a row char */ /* param : b column char */ /* return : unsigned char */ /************************************************************************/

unsignedchar AES::FFmul(unsignedchar a, unsignedchar b)

{

unsignedcharbw[AES_KEY_ROW_NUMBER];

unsignedchar res=0;

int i;

bw[0] = b;

for(i=1; i<AES_KEY_ROW_NUMBER; i++)

{

bw[i] = bw[i-1]<<1;

if(bw[i-1]&0x80)

{

bw[i]^=0x1b;

}

}

for(i=0; i<AES_KEY_ROW_NUMBER; i++)

{

if((a>>i)&0x01)

{

res ^= bw[i];

}

}

return res;

}

/************************************************************************/ /* Create bytes alternatives */ /* param : state[][] Byte array alternative */ /* return : void */ /************************************************************************/ void AES::SubBytes(unsignedchar state[][AES_KEY_COLUMN_NUMBER])

{

intr,c;

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

state[r][c] = permutebox[state[r][c]];

}

}

}

/************************************************************************/

/* Create rows transform method */ /* param : state[][] line array alternative */ /* return : void */ /************************************************************************/ void AES::ShiftRows(unsignedchar state[][AES_KEY_COLUMN_NUMBER]) {

unsignedchar t[AES_KEY_COLUMN_NUMBER];

intr,c;

for(r=1; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

t[c] = state[r][(c+r)%AES_KEY_COLUMN_NUMBER];

}

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

state[r][c] = t[c];

}

}

}

/************************************************************************/ /* Create columns transform method */ /* param : state[][] columns array alternative */ /* return : void */ /************************************************************************/ void AES::MixColumns(unsignedchar state[][AES_KEY_COLUMN_NUMBER]) {

unsignedchar t[AES_KEY_ROW_NUMBER];

intr,c;

for(c=0; c< AES_KEY_COLUMN_NUMBER; c++)

{

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

t[r] = state[r][c];

}

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

state[r][c] = FFmul(0x02, t[r])

^ FFmul(0x03, t[(r+1)%AES_KEY_COLUMN_NUMBER]) ^ FFmul(0x01, t[(r+2)%AES_KEY_COLUMN_NUMBER]) ^ FFmul(0x01, t[(r+3)%AES_KEY_COLUMN_NUMBER]); }

}

}

/************************************************************************/ /*Create round keys plus transform method */ /* param : state[][] keys plus array alternative */ /* param : k[][] temp array alternative */ /* return : void */ /************************************************************************/ void AES::AddRoundKey(unsignedchar state[][AES_KEY_COLUMN_NUMBER],

unsignedchark[][AES_KEY_COLUMN_NUMBER])

{

intr,c;

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

state[r][c] ^= k[r][c];

}

}

}

/************************************************************************/ /* CreateInvSubBytes alternatives */ /* param : state[][] InvSubBytes array alternative */ /* return : void */ /************************************************************************/ void AES::InvSubBytes(unsignedchar state[][AES_KEY_COLUMN_NUMBER])

{

intr,c;

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

state[r][c] = inversepermutationbox[state[r][c]];

}

}

}

/************************************************************************/ /* CreateInvShiftRows transform method */ /* param : state[][] InvShiftRows array alternative */ /* return : void */ /************************************************************************/ void AES::InvShiftRows(unsignedchar state[][AES_KEY_COLUMN_NUMBER])

{

unsignedchar t[AES_KEY_COLUMN_NUMBER];

intr,c;

for(r=1; r<AES_KEY_ROW_NUMBER; r++)

{

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

t[c] = state[r][(c-r+AES_KEY_COLUMN_NUMBER)%AES_KEY_COLUMN_NUMBER]; }

for(c=0; c<AES_KEY_COLUMN_NUMBER; c++)

{

state[r][c] = t[c];

}

}

}

/************************************************************************/ /* CreateInvMixColumns transform method */ /* param : state[][] InvMixColumns array alternative */ /* return : void */

/************************************************************************/ void AES::InvMixColumns(unsignedchar state[][AES_KEY_COLUMN_NUMBER]) {

unsignedchar t[AES_KEY_ROW_NUMBER];

intr,c;

for(c=0; c< AES_KEY_COLUMN_NUMBER; c++)

{

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

t[r] = state[r][c];

}

for(r=0; r<AES_KEY_ROW_NUMBER; r++)

{

state[r][c] = FFmul(0x0e, t[r])

^ FFmul(0x0b, t[(r+1)%AES_KEY_ROW_NUMBER]) ^ FFmul(0x0d, t[(r+2)%AES_KEY_ROW_NUMBER]) ^ FFmul(0x09, t[(r+3)%AES_KEY_ROW_NUMBER]); }

}

}

//TestEncryption.cpp用于测试主方法

#include<stdio.h>

#include<string.h>

#include<istream>

#include<vector>

unsignedchar key[] =

{

'v' ,'b','c','d',

'f' ,'i','n','o',

'e' ,'w','t','i',

'q' ,'x','l','p',

/*0xff, 0x7e, 0x15, 0x16,

0x28, 0xae, 0xd2, 0xa6,

0xab, 0xf7, 0x15, 0x88,

0x09, 0xcf, 0x4f, 0x3c*/

};

int main()

{

Encryption* aes = EncryptionFactory::getEncryption(0,key);

char* s="1234567891234567abcdefghijklmnop";

unsignedchar * strEncrypt = aes->encrypt(s);

puts((char*)strEncrypt);

} unsignedchar * strDecrypt = aes->decrypt((char*)strEncrypt); puts((char*)strDecrypt); getchar(); return 0;

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