vs2008C++实现AES加密解密算法

#include "stdafx.h" #include "AES.h" const BYTE Sbox[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} }; const BYTE iSbox[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} }; const BYTE Rcon[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} }; BYTE *AES::RotWord( BYTE *word ) { BYTE *result = new BYTE [4]; result[0] = word[1]; result[1] = word[2]; result[2] = word[3]; result[3] = word[0]; delete[] word; return result; }; BYTE *AES::SubWord( BYTE *word ) { BYTE *result = new BYTE[4]; result[0] = Sbox[ word[0] >> 4][ word[0] & 0x0f ]; result[1] = Sbox[ word[1] >> 4][ word[1] & 0x0f ]; result[2] = Sbox[ word[2] >> 4][ word[2] & 0x0f ]; result[3] = Sbox[ word[3] >> 4][ word[3] & 0x0f ]; delete[] word; return result; } AES::AES( ENUM_KEYSIZE keysize, BYTE *key ) { this->Nb = 4; switch( keysize ) { case AES::BIT128: this->Nk = 4; this->Nr = 10; break; case AES::BIT192: this->Nk = 6; this->Nr = 12; break; case AES::BIT256: default: this->Nk = 8; this->Nr = 14; break; } this->key = new BYTE[this->Nk * 4]; memcpy( this->key, key, this->Nk * 4 ); this->w = new BYTE4[Nb * (Nr+1)]; for( int row = 0; row < Nk; ++row ) { w[row].w[0] = this->key[4*row]; w[row].w[1] = this->key[4*row+1]; w[row].w[2] = this->key[4*row+2]; w[row].w[3] = this->key[4*row+3]; } BYTE *temp = new BYTE[4]; for( int row = Nk; row < Nb *(Nr + 1); ++ row ) { temp[0] = this->w[row-1].w[0]; temp[1] = this->w[row-1].w[1]; temp[2] = this->w[row-1].w[2]; temp[3] = this->w[row-1].w[3]; if (row % Nk == 0) { temp = SubWord(RotWord(temp));//this change two size temp[0] = (BYTE)( (int)temp[0] ^ (int)Rcon[row/Nk][0] ); temp[1] = (BYTE)( (int)temp[1] ^ (int)Rcon[row/Nk][1] ); temp[2] = (BYTE)( (int)temp[2] ^ (int)Rcon[row/Nk][2] ); temp[3] = (BYTE)( (int)temp[3] ^ (int)Rcon[row/Nk][3] ); } else if ( Nk > 6 && (row % Nk == 4) ) { temp = SubWord(temp); } // w[row] = w[row-Nk] xor temp this->w[row].w[0] = (BYTE) ( (int)this->w[row-Nk].w[0] ^ (int)temp[0] ); this->w[row].w[1] = (BYTE) ( (int)this->w[row-Nk].w[1] ^ (int)temp[1] ); this->w[row].w[2] = (BYTE) ( (int)this->w[row-Nk].w[2] ^ (int)temp[2] ); this->w[row].w[3] = (BYTE) ( (int)this->w[row-Nk].w[3] ^ (int)temp[3] ); }//loop delete[] temp; for(int i=0;i<4;i++) { this->State[i] = NULL; } } AES::~AES(void) { for(int i=0;i<4;i++) { if (this->State[i] != NULL) { delete []this->State[i]; } } } void* AES::Cipher(void* input, int length, int &outlength) { int i; outlength = length + (16-length%16); BYTE* in = new BYTE[outlength]; memcpy(in, input, length); for(i = length; i<outlength; i++) { in[i] = outlength - length; } //BYTE* in = (BYTE*) input; for(i=0; i<length; i+=16) { Cipher(in+i); } return in; } void AES::Cipher( BYTE *input) { if (this->State[0] == NULL) { for(int i=0;i<4;i++) { this->State[i] = new BYTE[this->Nb]; } } for (int i = 0; i < (4 * Nb); ++i) { this->State[i%4][i/4] = input[i]; } AddRoundKey(0); for (int round = 1; round <= (Nr - 1); ++round) // main round loop { SubBytes(); ShiftRows(); MixColumns(); AddRoundKey(round); } // main round loop SubBytes(); ShiftRows(); AddRoundKey(Nr); // output = state for (int i = 0; i < (4 * Nb); ++i) { input[i] = this->State[i % 4][ i / 4]; } } void* AES::InvCipher(void* input, int inlength, int outlength) { BYTE* in = (BYTE*) input; int i; for(i=0; i<inlength; i+=16) { InvCipher(in+i); } if(outlength <= 0) { return NULL; } else { BYTE* out = new BYTE[outlength]; memcpy(out, in, outlength); return out; } } void AES::InvCipher( BYTE *input) { if (this->State[0] == NULL) { for(int i=0;i<4;i++) { this->State[i] = new BYTE[this->Nb]; } }