AES-128加密算法，C语言实现

/******************************************************************************* **文件名 aes.c **版本号： 1.0 **运行环境： RealView MDK-ARM 5.0 **作者： LXB **日期: 2018-4-03 **功能: AES-ECB加密PKCS5填充 **相关文件: 无 **修改日志： 2018-4-03 创建 *******************************************************************************/ #include "AES128.h" unsigned char kTable[16] = { 0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x74, 0x21,0x40,0x33,0x34,0x35,0x36,0x37,0x38 }; /** * 密钥扩展要用到的矩阵 **/ static const int RCON[10][4]= { 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 }; /** * 列混合要用到的矩阵 **/ static const unsigned char colM[4][4] = { 0x02, 0x03, 0x01, 0x01, 0x01, 0x02, 0x03, 0x01, 0x01, 0x01, 0x02, 0x03, 0x03, 0x01, 0x01, 0x02 }; /** * 逆列混合用到的矩阵 */ static const unsigned char deColM[4][4] = { 0xe, 0xb, 0xd, 0x9, 0x9, 0xe, 0xb, 0xd, 0xd, 0x9, 0xe, 0xb, 0xb, 0xd, 0x9, 0xe }; /** * S盒 **/ static const unsigned char S_box[16][16]= { 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 }; static const unsigned char InverS_box[16][16]= { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d }; /** *原始密钥+10轮扩展密钥 *w_state[0][0]-w_state[3][3]，存放原始密钥，16个字节 *w_state[4*round][0]-w_state[4*round+3][3]，存放第round轮扩展密钥，16个字节 **/ static unsigned char w_state[44][4]; //16个字节密钥，每4个一组。原始密钥+10轮扩展密钥 /** * 扩展密钥，结果是把w中的每个元素初始化,44列*4行————W[44][4] **/ void extendKey(unsigned char *key) { unsigned char i; unsigned char j; unsigned char temp[4],round; for( i = 0; i < 4; i++) //将16个字节的key依次存入W[0~3][3] { for( j=0;j<4;j++) { w_state[i][j]=*key++; } } for( i=4,round=0;i<44;i++) { if(i%4==0) { T_transform(w_state[i-1],temp,round); for( j=0;j<4;j++) { w_state[i][j]=w_state[i-4][j]^temp[j]; } round++; } else for( j=0;j<4;j++) { w_state[i][j]=w_state[i-4][j]^w_state[i-1][j]; } } } void T_transform(unsigned char *input,unsigned char *output,unsigned char round) { unsigned char temp[4]; unsigned char row,col; //第二步，字节替换，查S盒。 unsigned char i; temp[0]=input[1]; //第一步，左移1位 temp[1]=input[2]; temp[2]=input[3]; temp[3]=input[0]; for( i=0;i<4;i++) { row=temp[i]>>4; col=temp[i]&0x0F; output[i]=S_box[row][col]^RCON[round][i]; //第三步，与RCON异或 } } /** * 字节替换，根据索引，从S盒中获得元素 **/ void SBox_transform(unsigned char input[16]) { unsigned char row,col,i; for( i=0;i<16;i++) { row=input[i]>>4; col=input[i]&0x0F; input[i]=S_box[row][col]; } } /** * 逆字节变换，根据索引，从逆S盒中获得元素 */ void Inver_SBox_transform(unsigned char input[16]) { unsigned char row,col,i; for( i=0;i<16;i++) { row=input[i]>>4; col=input[i]&0x0F; input[i]=InverS_box[row][col]; } } /** *将数组左移step位 **/ void left_shift_step(unsigned char *input, unsigned char step) { unsigned char temp[4],i; unsigned char num=0; for( i=0;i<4;i++) { temp[i]=input[i]; } if(step%4!=0) { num=step%4; } for( i=0;i<4;i++) { input[i]=temp[num]; num++; num=num%4; } } /** *行移位 **/ void row_shift(unsigned char input[16]) { unsigned char row2[4],row3[4],row4[4]; unsigned char i; for( i=0;i<4;i++) { row2[i]=input[1+i*4]; row3[i]=input[2+i*4]; row4[i]=input[3+i*4]; } left_shift_step(row2,1); left_shift_step(row3,2); left_shift_step(row4,3); for( i=0;i<4;i++) { input[1+i*4]=row2[i]; input[2+i*4]=row3[i]; input[3+i*4]=row4[i]; } } /** * 把4个元素的数组循环右移step位 */ void right_shift_step(unsigned char *input, unsigned char step) { int temp[4]; int i; unsigned char num=0; for( i = 0; i < 4; i++) { temp[i] = input[i]; } if(step%4!=0) { num=4-step%4; } for( i=0;i<4;i++) { input[i]=temp[num]; num++; if(num==4) { num=0; } } } /** *逆行移位 **/ void Inver_row_shift(unsigned char input[16]) { unsigned char row2[4],row3[4],row4[4]; unsigned char i; for( i=0;i<4;i++) { row2[i]=input[1+i*4]; row3[i]=input[2+i*4]; row4[i]=input[3+i*4]; } right_shift_step(row2,1); right_shift_step(row3,2); right_shift_step(row4,3