我的blog中,已经写过一篇关于aes加密算法的调用。不过使用的参数必须时unsigned char类型。我们在
编程中使用最多的char类型,我从网上下载了一个代码,追加了一部分代码。
其主要功能进行实现unsigned char类型数据到char类型转化,将unsigned char结果与16进制字符串串之间的转化。代码如下:
点击(此处)折叠或打开
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#ifndef AES_H
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#define AES_H
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#include <string.h>
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class AES
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{
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public:
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AES(unsigned char* key);
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virtual ~AES();
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unsigned char* Cipher(unsigned char* input);
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unsigned char* InvCipher(unsigned char* input);
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void* Cipher(void* input, int length=0);
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void* InvCipher(void* input, int length);
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void Cipher(char *input, char *output);
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void InvCipher(char *inut, char *output);
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private:
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unsigned char Sbox[256];
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unsigned char InvSbox[256];
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unsigned char w[11][4][4];
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void KeyExpansion(unsigned char* key, unsigned
char w[][4][4]);
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unsigned char FFmul(unsigned char a, unsigned char b);
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void SubBytes(unsigned char state[][4]);
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void ShiftRows(unsigned char state[][4]);
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void MixColumns(unsigned char state[][4]);
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void AddRoundKey(unsigned char state[][4], unsigned
char k[][4]);
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void InvSubBytes(unsigned char state[][4]);
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void InvShiftRows(unsigned char state[][4]);
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void InvMixColumns(unsigned char state[][4]);
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int strToHex(const char *ch, char *hex);
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int hexToStr(const char *hex, char *ch);
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int ascillToValue(const char
ch);
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char valueToHexCh(const int value);
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int getUCharLen(const unsigned
char *uch);
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int strToUChar(const char *ch, unsigned
char *uch);
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int ucharToStr(const unsigned
char *uch, char *ch);
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int ucharToHex(const unsigned
char *uch, char *hex);
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int hexToUChar(const char *hex, unsigned
char *uch);
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};
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- #endif // AES_H
点击(此处)折叠或打开
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#include "aes.h"
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AES::AES(unsigned char* key)
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{
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unsigned char sBox[] =
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{ /* 0 1 2 3 4 5 6
7 8 9 a b c d e f */
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0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76, /*0*/
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0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0, /*1*/
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0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15, /*2*/
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0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75, /*3*/
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0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84, /*4*/
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0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf, /*5*/
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0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8, /*6*/
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0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2, /*7*/
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0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73, /*8*/
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0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb, /*9*/
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0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79, /*a*/
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0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08, /*b*/
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0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a, /*c*/
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0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e, /*d*/
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0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf, /*e*/
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0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16 /*f*/
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};
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unsigned char invsBox[256] =
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{ /* 0 1 2 3 4 5 6
7 8 9 a b c d e f */
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0x52,0x09,0x6a,0xd5,0x30,0x36,0xa5,0x38,0xbf,0x40,0xa3,0x9e,0x81,0xf3,0xd7,0xfb, /*0*/
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0x7c,0xe3,0x39,0x82,0x9b,0x2f,0xff,0x87,0x34,0x8e,0x43,0x44,0xc4,0xde,0xe9,0xcb, /*1*/
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0x54,0x7b,0x94,0x32,0xa6,0xc2,0x23,0x3d,0xee,0x4c,0x95,0x0b,0x42,0xfa,0xc3,0x4e, /*2*/
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0x08,0x2e,0xa1,0x66,0x28,0xd9,0x24,0xb2,0x76,0x5b,0xa2,0x49,0x6d,0x8b,0xd1,0x25, /*3*/
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0x72,0xf8,0xf6,0x64,0x86,0x68,0x98,0x16,0xd4,0xa4,0x5c,0xcc,0x5d,0x65,0xb6,0x92, /*4*/
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0x6c,0x70,0x48,0x50,0xfd,0xed,0xb9,0xda,0x5e,0x15,0x46,0x57,0xa7,0x8d,0x9d,0x84, /*5*/
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0x90,0xd8,0xab,0x00,0x8c,0xbc,0xd3,0x0a,0xf7,0xe4,0x58,0x05,0xb8,0xb3,0x45,0x06, /*6*/
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0xd0,0x2c,0x1e,0x8f,0xca,0x3f,0x0f,0x02,0xc1,0xaf,0xbd,0x03,0x01,0x13,0x8a,0x6b, /*7*/
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0x3a,0x91,0x11,0x41,0x4f,0x67,0xdc,0xea,0x97,0xf2,0xcf,0xce,0xf0,0xb4,0xe6,0x73, /*8*/
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0x96,0xac,0x74,0x22,0xe7,0xad,0x35,0x85,0xe2,0xf9,0x37,0xe8,0x1c,0x75,0xdf,0x6e, /*9*/
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0x47,0xf1,0x1a,0x71,0x1d,0x29,0xc5,0x89,0x6f,0xb7,0x62,0x0e,0xaa,0x18,0xbe,0x1b, /*a*/
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0xfc,0x56,0x3e,0x4b,0xc6,0xd2,0x79,0x20,0x9a,0xdb,0xc0,0xfe,0x78,0xcd,0x5a,0xf4, /*b*/
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0x1f,0xdd,0xa8,0x33,0x88,0x07,0xc7,0x31,0xb1,0x12,0x10,0x59,0x27,0x80,0xec,0x5f, /*c*/
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0x60,0x51,0x7f,0xa9,0x19,0xb5,0x4a,0x0d,0x2d,0xe5,0x7a,0x9f,0x93,0xc9,0x9c,0xef, /*d*/
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0xa0,0xe0,0x3b,0x4d,0xae,0x2a,0xf5,0xb0,0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61, /*e*/
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0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26,0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d /*f*/
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};
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memcpy(Sbox, sBox, 256);
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memcpy(InvSbox, invsBox, 256);
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KeyExpansion(key, w);
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}
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AES::~AES()
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{
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}
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void AES::Cipher(char *input, char *output)
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{
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unsigned char uch_input[1024];
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strToUChar(input, uch_input);
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Cipher(uch_input);
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ucharToHex(uch_input,output);
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}
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void AES::InvCipher(char *input, char *output)
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{
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unsigned char uch_input[1024];
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hexToUChar(input, uch_input);
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InvCipher(uch_input);
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ucharToStr(uch_input, output);
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}
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unsigned char* AES::Cipher(unsigned
char* input)
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{
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unsigned char state[4][4];
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int i,r,c;
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for(r=0; r<4; r++)
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{
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for(c=0; c<4 ;c++)
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{
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state[r][c] = input[c*4+r];
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}
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}
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AddRoundKey(state,w[0]);
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for(i=1; i<=10; i++)
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{
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SubBytes(state);
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ShiftRows(state);
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if(i!=10)MixColumns(state);
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AddRoundKey(state,w[i]);
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}
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for(r=0; r<4; r++)
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{
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for(c=0; c<4 ;c++)
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{
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input[c*4+r] = state[r][c];
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}
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}
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return input;
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}
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unsigned char* AES::InvCipher(unsigned
char* input)
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{
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unsigned char state[4][4];
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int i,r,c;
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for(r=0; r<4; r++)
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{
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for(c=0; c<4 ;c++)
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{
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state[r][c] = input[c*4+r];
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}
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}
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AddRoundKey(state, w[10]);
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for(i=9; i>=0; i--)
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{
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InvShiftRows(state);
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InvSubBytes(state);
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AddRoundKey(state, w[i]);
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if(i)
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{
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InvMixColumns(state);
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}
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}
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for(r=0; r<4; r++)
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{
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for(c=0; c<4 ;c++)
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{
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input[c*4+r] = state[r][c];
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}
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}
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return input;
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}
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void* AES::Cipher(void* input, int length)
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{
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unsigned char* in = (unsigned
char*) input;
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int i;
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if(!length)
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{
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while(*(in+length++));
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in = (unsigned char*) input;
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}
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for(i=0; i<length; i+=16)
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{
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Cipher(in+i);
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}
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return input;
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}
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void* AES::InvCipher(void* input, int length)
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{
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unsigned char* in = (unsigned
char*) input;
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int i;
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for(i=0; i<length; i+=16)
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{
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InvCipher(in+i);
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}
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return input;
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}
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void AES::KeyExpansion(unsigned
char* key, unsigned char w[][4][4])
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{
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int i,j,r,c;
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unsigned char rc[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36};
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for(r=0; r<4; r++)
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{
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for(c=0; c<4; c++)
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{
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w[0][r][c] = key[r+c*4];
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}
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}
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for(i=1; i<=10; i++)
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{
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for(j=0; j<4; j++)
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{
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unsigned char t[4];
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for(r=0; r<4; r++)
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{
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t[r] = j ? w[i][r][j-1] : w[i-1][r][3];
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}
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if(j == 0)
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{
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unsigned char temp = t[0];
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for(r=0; r<3; r++)
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{
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t[r] = Sbox[t[(r+1)%4]];
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}
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t[3] = Sbox[temp];
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t[0] ^= rc[i-1];
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}
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for(r=0; r<4; r++)
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{
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w[i][r][j] = w[i-1][r][j] ^
t[r];
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}
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}
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}
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}
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unsigned char AES::FFmul(unsigned
char a, unsigned char b)
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{
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unsigned char bw[4];
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unsigned char res=0;
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int i;
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bw[0] = b;
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for(i=1; i<4; i++)
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{
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bw[i] = bw[i-1]<<1;
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if(bw[i-1]&0x80)
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{
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bw[i]^=0x1b;
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}
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}
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for(i=0; i<4; i++)
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{
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if((a>>i)&0x01)
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{
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res ^= bw[i];
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}
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}
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return res;
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}
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void AES::SubBytes(unsigned
char state[][4])
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{
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int r,c;
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for(r=0; r<4; r++)
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{
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for(c=0; c<4; c++)
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{
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state[r][c] = Sbox[state[r][c]];
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}
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}
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}
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void AES::ShiftRows(unsigned
char state[][4])
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{
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unsigned char t[4];
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int r,c;
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for(r=1; r<4; r++)
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{
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for(c=0; c<4; c++)
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{
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t[c] = state[r][(c+r)%4];
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}
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for(c=0; c<4; c++)
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{
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state[r][c] = t[c];
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}
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}
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}
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void AES::MixColumns(unsigned
char state[][4])
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{
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unsigned char t[4];
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int r,c;
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for(c=0; c< 4; c++)
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{
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for(r=0; r<4; r++)
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{
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t[r] = state[r][c];
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}
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for(r=0; r<4; r++)
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{
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state[r][c] = FFmul(0x02, t[r])
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^ FFmul(0x03, t[(r+1)%4])
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^ FFmul(0x01, t[(r+2)%4])
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^ FFmul(0x01, t[(r+3)%4]);
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}
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}
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}
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void AES::AddRoundKey(unsigned
char state[][4], unsigned
char k[][4])
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{
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int r,c;
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for(c=0; c<4; c++)
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{
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for(r=0; r<4; r++)
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{
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state[r][c] ^= k[r][c];
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}
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}
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}
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void AES::InvSubBytes(unsigned
char state[][4])
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{
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int r,c;
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for(r=0; r<4; r++)
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{
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for(c=0; c<4; c++)
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{
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state[r][c] = InvSbox[state[r][c]];
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}
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}
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}
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void AES::InvShiftRows(unsigned
char state[][4])
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{
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unsigned char t[4];
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int r,c;
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for(r=1; r<4; r++)
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{
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for(c=0; c<4; c++)
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{
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t[c] = state[r][(c-r+4)%4];
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}
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for(c=0; c<4; c++)
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{
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state[r][c] = t[c];
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}
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}
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}
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void AES::InvMixColumns(unsigned
char state[][4])
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{
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unsigned char t[4];
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int r,c;
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for(c=0; c< 4; c++)
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{
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for(r=0; r<4; r++)
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{
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t[r] = state[r][c];
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}
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for(r=0; r<4; r++)
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{
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state[r][c] = FFmul(0x0e, t[r])
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^ FFmul(0x0b, t[(r+1)%4])
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^ FFmul(0x0d, t[(r+2)%4])
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^ FFmul(0x09, t[(r+3)%4]);
-
}
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}
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}
-
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int AES::getUCharLen(const unsigned
char *uch)
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{
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int len = 0;
-
while(*uch++)
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++len;
-
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return len;
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}
-
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int AES::ucharToHex(const unsigned
char *uch, char *hex)
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{
-
int high,low;
-
int tmp = 0;
-
if(uch == NULL || hex == NULL){
-
return -1;
-
}
-
-
if(getUCharLen(uch) == 0){
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return -2;
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}
-
-
while(*uch){
-
tmp = (int)*uch;
-
high = tmp >> 4;
-
low = tmp & 15;
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*hex++ = valueToHexCh(high); //先写高字节
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*hex++ = valueToHexCh(low); //其次写低字节
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uch++;
-
}
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*hex = '\0';
-
return 0;
-
}
-
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int AES::hexToUChar(const char *hex, unsigned
char *uch)
-
{
-
int high,low;
-
int tmp = 0;
-
if(hex == NULL || uch == NULL){
-
return -1;
-
}
-
-
if(strlen(hex) %2 == 1){
-
return -2;
-
}
-
-
while(*hex){
-
high = ascillToValue(*hex);
-
if(high < 0){
-
*uch = '\0';
-
return -3;
-
}
-
hex++; //指针移动到下一个字符上
-
low = ascillToValue(*hex);
-
if(low < 0){
-
*uch = '\0';
-
return -3;
-
}
-
tmp = (high << 4) + low;
-
*uch++ = tmp;
-
hex++;
-
}
-
*uch = (int)'\0';
-
return 0;
-
}
-
-
int AES::strToUChar(const char *ch, unsigned
char *uch)
-
{
-
int tmp = 0;
-
if(ch == NULL || uch == NULL)
-
return -1;
-
if(strlen(ch) == 0)
-
return -2;
-
-
while(*ch){
-
tmp = (int)*ch;
-
*uch++ = tmp;
-
ch++;
-
}
-
*uch = (int)'\0';
-
return 0;
-
}
-
-
int AES::ucharToStr(const unsigned
char *uch, char *ch)
-
{
-
int tmp = 0;
-
if(uch == NULL || ch == NULL)
-
return -1;
-
-
while(*uch){
-
tmp = (int)*uch;
-
*ch++ = (char)tmp;
-
uch++;
-
}
-
*ch = '\0';
-
-
return 0;
-
}
-
-
int AES::strToHex(const char *ch, char *hex)
-
{
-
int high,low;
-
int tmp = 0;
-
if(ch == NULL || hex == NULL){
-
return -1;
-
}
-
-
if(strlen(ch) == 0){
-
return -2;
-
}
-
-
while(*ch){
-
tmp = (int)*ch;
-
high = tmp >> 4;
-
low = tmp & 15;
-
*hex++ = valueToHexCh(high); //先写高字节
-
*hex++ = valueToHexCh(low); //其次写低字节
-
ch++;
-
}
-
*hex = '\0';
-
return 0;
-
}
-
-
int AES::hexToStr(const char *hex, char *ch)
-
{
-
int high,low;
-
int tmp = 0;
-
if(hex == NULL || ch == NULL){
-
return -1;
-
}
-
-
if(strlen(hex) %2 == 1){
-
return -2;
-
}
-
-
while(*hex){
-
high = ascillToValue(*hex);
-
if(high < 0){
-
*ch = '\0';
-
return -3;
-
}
-
hex++; //指针移动到下一个字符上
-
low = ascillToValue(*hex);
-
if(low < 0){
-
*ch = '\0';
-
return -3;
-
}
-
tmp = (high << 4) + low;
-
*ch++ = (char)tmp;
-
hex++;
-
}
-
*ch = '\0';
-
return 0;
-
}
-
-
int AES::ascillToValue(const char
ch){
-
int result = 0;
-
//获取16进制的高字节位数据
-
if(ch >= '0' && ch <= '9'){
-
result = (int)(ch - '0');
-
}
-
else if(ch >= 'a' && ch <= 'z'){
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result = (int)(ch - 'a') + 10;
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}
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else if(ch >= 'A' && ch <= 'Z'){
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result = (int)(ch - 'A') + 10;
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}
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else{
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result = -1;
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}
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return result;
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}
-
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char AES::valueToHexCh(const int value)
-
{
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char result = '\0';
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if(value >= 0 && value <= 9){
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result = (char)(value + 48); //48为ascii编码的‘0’字符编码值
-
}
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else if(value >= 10 && value <= 15){
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result = (char)(value - 10 + 65); //减去10则找出其在16进制的偏移量,65为ascii的'A'的字符编码值
-
}
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else{
-
;
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}
-
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return result;
- }
直接使用char类型字符串,就好了。调用如下:
点击(此处)折叠或打开
-
#include <QString>
-
-
#include <stdio.h>
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#include "aes.h"
-
-
int main(int argc, char *argv[])
-
{
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char mingwen[] = "http://www.baidu.com";
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char miwen_hex[1024];
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//char miwen_hex[] = "8FEEEFE524F8B68DC1FCA2899AC1A6B82E636F6D";
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char result[1024];
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unsigned char key[] = "xcysoft123";
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AES aes(key);
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aes.Cipher(mingwen, miwen_hex);
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printf("%s\n",miwen_hex);
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aes.InvCipher(miwen_hex, result);
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printf("%s\n",result);
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getchar();
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return 0;
- }
AES.rar
补充:在QT开发环境中,我们经常使用的QString类型进行字符串的加密,解密。因此编写一个类。
来进行方便的操作,代码如下:
AesHelper.h的源代码
点击(此处)折叠或打开
-
#ifndef AESHELPER_H
-
#define AESHELPER_H
-
-
#include <QString>
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#include <QTextCodec>
-
-
#include <string.h>
-
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#include "aes.h"
-
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class AesHelper
-
{
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public:
-
AesHelper();
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~AesHelper();
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QString aesEncrypt(QString mingwen);
-
-
QString aesUncrypt(QString miwen);
-
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private:
-
AES *aes;
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};
-
- #endif // AESHELPER_H
点击(此处)折叠或打开
-
#include "AesHelper.h"
-
-
AesHelper::AesHelper()
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{
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unsigned char key[] = "1p2w3e4r";
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aes = new AES(key);
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}
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AesHelper::~AesHelper()
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{
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delete aes;
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aes = 0;
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}
-
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QString AesHelper::aesEncrypt(QString
mingwen)
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{
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QString result = QString("");
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char ch_mingwen[10240];
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char ch_miwen[10240];
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strcpy(ch_mingwen, mingwen.toUtf8().data());
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aes->Cipher(ch_mingwen, ch_miwen);
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result = QString(ch_miwen);
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return result;
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}
-
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QString AesHelper::aesUncrypt(QString
miwen)
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{
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QString result = QString("");
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char ch_mingwen[10240];
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char ch_miwen[10240];
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strcpy(ch_miwen, miwen.toUtf8().data());
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aes->InvCipher(ch_miwen, ch_mingwen);
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result = QString(ch_mingwen);
-
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return result;
- }