c AES_CBC_128_padding5加密算法
c语言
最近需要对数据进行加密需要你用AES加密算法,从网上找到了一个,然后进行了修改,可以正常使用
#include <stdio.h> #include <stdlib.h> #include <string.h> unsigned char FA(unsigned char b); unsigned char FB(unsigned char b); unsigned char FC(unsigned char b); unsigned char FD(unsigned char b); unsigned char FE(unsigned char b); unsigned char Ff(unsigned char b); void Cipher(unsigned char* input, unsigned char* output,unsigned char* w);//加密 void InvCipher(unsigned char* input, unsigned char* output,unsigned char* w);//解密 static unsigned char AesSbox[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 unsigned char AesiSbox[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 }; 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 }; unsigned char FA(unsigned char b){if (b < 0x80) return (b <<1);else return ( (b << 1) ^ (0x1b) );} unsigned char FB(unsigned char b){return FA(b) ^ b ;} unsigned char FC(unsigned char b){return FA(FA(FA(b))) ^ b ;} unsigned char FD(unsigned char b){return FA(FA(FA(b))) ^ FA(b) ^ b ;} unsigned char FE(unsigned char b){return FA(FA(FA(b))) ^ FA(FA(b)) ^ b;} unsigned char Ff(unsigned char b){return FA(FA(FA(b))) ^ FA(FA(b)) ^ FA(b);} void Cipher(unsigned char* input, unsigned char* output,unsigned char* exp_key) { int i,j; int round ; unsigned char ttt[4*4]; unsigned char State[4][4]; for(i=0;i<16;i++) State[i%4][i/4]=input[i]; for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=State[i][j]^exp_key[4*j+i]; for (round = 1; round <= 9; round++) { for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=AesSbox[State[i][j]]; for(j=0;j<4;j++)for(i=0;i<4;i++)ttt[4*i+j]=State[i][j]; for(i=1;i<4;i++)for(j=0;j<4;j++) {if(i==1)State[i][j]=ttt[4*i+(j+1)%4];else if(i==2)State[i][j]=ttt[4*i+(j+2)%4];else if(i==3)State[i][j]=ttt[4*i+(j+3)%4];} for(j=0;j<4;j++) for(i=0;i<4;i++) ttt[4*i+j]=State[i][j]; for(j=0;j<4;j++) { State[0][j] = FA(ttt[0+j]) ^ FB(ttt[4*1+j]) ^ ttt[4*2+j] ^ ttt[4*3+j]; State[1][j] = ttt[0+j] ^ FA(ttt[4*1+j]) ^ FB(ttt[4*2+j]) ^ ttt[4*3+j]; State[2][j] = ttt[0+j] ^ ttt[4*1+j] ^ FA(ttt[4*2+j]) ^ FB(ttt[4*3+j]); State[3][j] = FB(ttt[0+j]) ^ ttt[4*1+j] ^ ttt[4*2+j] ^ FA(ttt[4*3+j]); } for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=State[i][j]^exp_key[4*((round*4)+j)+i]; } for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=AesSbox[State[i][j]]; for(j=0;j<4;j++)for(i=0;i<4;i++)ttt[4*i+j]=State[i][j]; for(i=1;i<4;i++)for(j=0;j<4;j++) {if(i==1)State[i][j]=ttt[4*i+(j+1)%4];else if(i==2)State[i][j]=ttt[4*i+(j+2)%4];else if(i==3)State[i][j]=ttt[4*i+(j+3)%4];} for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=State[i][j]^exp_key[4*(40+j)+i]; for ( i = 0; i < 16; i++)output[i] = State[i%4][i/4]; } //Aes解密函数 void InvCipher(unsigned char* input,unsigned char* output,unsigned char* exp_key) { int round; int i,j; unsigned char ttt[4*4]; unsigned char State[4][4]; for ( i = 0; i < 16; i++)State[i % 4][ i / 4] = input[i]; for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=State[i][j]^exp_key[4*(40+j)+i]; for (round = 9; round >= 1; round--) { for(j=0;j<4;j++)for(i=0;i<4;i++)ttt[4*i+j]=State[i][j]; for(i=1;i<4;i++)for(j=0;j<4;j++) {if(i==1)State[i][j]=ttt[4*i+(j+3)%4];else if(i==2)State[i][j]=ttt[4*i+(j+2)%4];else if(i==3)State[i][j]=ttt[4*i+(j+1)%4];} for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=AesiSbox[State[i][j]]; for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=State[i][j]^exp_key[4*((round*4)+j)+i]; for (i = 0; i < 4; i++)for (j = 0; j < 4; j++) ttt[4*i+j] = State[i][j]; for (j = 0; j < 4; j++) { State[0][j] = Ff(ttt[j]) ^ FD(ttt[4+j]) ^ FE(ttt[4*2+j]) ^ FC(ttt[4*3+j]); State[1][j] = FC(ttt[j]) ^ Ff(ttt[4+j]) ^ FD(ttt[4*2+j]) ^ FE(ttt[4*3+j]); State[2][j] = FE(ttt[j]) ^ FC(ttt[4+j]) ^ Ff(ttt[4*2+j]) ^ FD(ttt[4*3+j]); State[3][j] = FD(ttt[j]) ^ FE(ttt[4+j]) ^ FC(ttt[4*2+j]) ^ Ff(ttt[4*3+j]); } } for(j=0;j<4;j++)for(i=0;i<4;i++)ttt[4*i+j]=State[i][j]; for(i=1;i<4;i++)for(j=0;j<4;j++) {if(i==1)State[i][j]=ttt[4*i+(j+3)%4];else if(i==2)State[i][j]=ttt[4*i+(j+2)%4];else if(i==3)State[i][j]=ttt[4*i+(j+1)%4];} for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]=AesiSbox[State[i][j]]; for(j=0;j<4;j++)for(i=0;i<4;i++)State[i][j]= State[i][j] ^ exp_key[4*j+i]; for ( i = 0; i < 16; i++)output[i] = State[i%4][i/4]; } /***************************************************** *函数功能: AES加密, 模式CBC,数据块128位,填充方式:pkcs5padding * 参数: * input_buff:需要加密的数组指针 * InputLen:加密数据的字节长度 * p_key: 指向密钥数据的指针, 1~16字节长度 * output_buff:加密结果输出指针 * * 返回值: OutLength 加密后的输出长度 *********************************************************/ unsigned long AES128_CBC_Encrypt(unsigned char * input_buff,unsigned long InputLen,unsigned char * p_key,unsigned char * output_buff,unsigned char *iv) { unsigned long OutLength=0; long i,j; unsigned char *lpCurInBuff=input_buff; unsigned char *lpCurOutBuff=output_buff; long blocknum=InputLen/16; long leftnum=InputLen%16; int row; unsigned char temp[4]; unsigned char ex_key[16*15]; for( row=0;row<4;row++) //拷贝seed 密钥 { ex_key[4*row+0] = *(p_key+4*row); ex_key[4*row+1] = *(p_key+4*row+1); ex_key[4*row+2] = *(p_key+4*row+2); ex_key[4*row+3] = *(p_key+4*row+3); } for( row=4;row<44;row++) { temp[0]=ex_key[4*row-4]; //当前列的前一列 temp[1]=ex_key[4*row-3]; temp[2]=ex_key[4*row-2]; temp[3]=ex_key[4*row-1]; if(row%4==0) { unsigned char exchange_buff=0; exchange_buff = temp[0]; temp[0] = AesSbox[16*(temp[1] >> 4)+(temp[1] & 0x0f)]; temp[1] = AesSbox[16*(temp[2] >> 4)+(temp[2] & 0x0f)]; temp[2] = AesSbox[16*(temp[3] >> 4)+(temp[3] & 0x0f)]; temp[3] = AesSbox[16*(exchange_buff >> 4)+(exchange_buff & 0x0f)]; temp[0] = temp[0] ^ AesRcon[4*(row/4)+0] ; temp[1] = temp[1] ^ AesRcon[4*(row/4)+1] ; temp[2] = temp[2] ^ AesRcon[4*(row/4)+2] ; temp[3] = temp[3] ^ AesRcon[4*(row/4)+3] ; } ex_key[4*row+0] = ex_key[4*(row-4)+0] ^ temp[0] ; ex_key[4*row+1] = ex_key[4*(row-4)+1] ^ temp[1] ; ex_key[4*row+2] = ex_key[4*(row-4)+2] ^ temp[2] ; ex_key[4*row+3] = ex_key[4*(row-4)+3] ^ temp[3] ; } for( i=0;i<blocknum;i++) { for(j = 0; j < 16; j++ )lpCurOutBuff[j] = lpCurInBuff[j] ^ iv[j] ; Cipher(lpCurOutBuff,lpCurOutBuff,ex_key); memcpy(iv, lpCurOutBuff, 16 ); lpCurInBuff+=16; lpCurOutBuff+=16; OutLength+=16; } if(leftnum) { unsigned char inbuff[16]; memset(inbuff,16-leftnum,16); memcpy(inbuff,lpCurInBuff,leftnum); for(j = 0; j < 16; j++ )lpCurOutBuff[j] = inbuff[j] ^ iv[j]; Cipher(lpCurOutBuff,lpCurOutBuff,ex_key); memcpy(iv, lpCurOutBuff, 16 ); lpCurOutBuff+=16; OutLength+=16; } else { unsigned char extrabuff[16]; memset(extrabuff,16,16); for(j = 0; j < 16; j++ )lpCurOutBuff[j] = extrabuff[j] ^ iv[j]; Cipher(lpCurOutBuff,lpCurOutBuff,ex_key); memcpy(iv, lpCurOutBuff, 16 ); OutLength+=16; } return OutLength; } /******************************************************* *函数功能: AES解密, 模式CBC,数据块128位,填充方式:pkcs5padding * 参数: * input_buff:需要解密的数组指针 * InputLen:需要解密数据的字节长度 * p_key: 指向密钥数据的指针, 1~16字节长度 * output_buff:加密结果输出指针 * * 返回值: OutLength 加密后的输出长度 ********************************************************/ unsigned long AES128_CBC_Decrypt(unsigned char * input_buff,unsigned long InputLen,unsigned char * p_key,unsigned char * output_buff,unsigned char *iv) { unsigned long OutLength=0; long blocknum=InputLen/16; long leftnum=InputLen%16; long i,j; unsigned char temp[16]; unsigned char *pCurInBuf=input_buff; unsigned char *pCurOutBuf=output_buff; int row; if(leftnum) {return 0;} unsigned char ex_key[16*15]; for( row=0;row<4;row++) { ex_key[4*row+0] = *(p_key+4*row); ex_key[4*row+1] = *(p_key+4*row+1); ex_key[4*row+2] = *(p_key+4*row+2); ex_key[4*row+3] = *(p_key+4*row+3); } for( row=4;row<44;row++) { temp[0]=ex_key[4*row-4]; //当前列的前一列 temp[1]=ex_key[4*row-3]; temp[2]=ex_key[4*row-2]; temp[3]=ex_key[4*row-1]; if(row%4==0) { unsigned char exchange_buff=0; exchange_buff = temp[0]; temp[0] = AesSbox[16*(temp[1] >> 4)+(temp[1] & 0x0f)]; temp[1] = AesSbox[16*(temp[2] >> 4)+(temp[2] & 0x0f)]; temp[2] = AesSbox[16*(temp[3] >> 4)+(temp[3] & 0x0f)]; temp[3] = AesSbox[16*(exchange_buff >> 4)+(exchange_buff & 0x0f)]; temp[0] = temp[0] ^ AesRcon[4*(row/4)+0] ; temp[1] = temp[1] ^ AesRcon[4*(row/4)+1] ; temp[2] = temp[2] ^ AesRcon[4*(row/4)+2] ; temp[3] = temp[3] ^ AesRcon[4*(row/4)+3] ; } ex_key[4*row+0] = ex_key[4*(row-4)+0] ^ temp[0] ; ex_key[4*row+1] = ex_key[4*(row-4)+1] ^ temp[1] ; ex_key[4*row+2] = ex_key[4*(row-4)+2] ^ temp[2] ; ex_key[4*row+3] = ex_key[4*(row-4)+3] ^ temp[3] ; } for(i=0;i<blocknum;i++) { InvCipher(pCurInBuf,pCurOutBuf,ex_key); for(j = 0; j < 16; j++ ) { pCurOutBuf[j] = pCurOutBuf[j] ^ iv[j] ; } memcpy( iv, pCurInBuf, 16 ); if(i == (blocknum-1)) { memset(temp,0,16); if(pCurOutBuf[15] != 0x10) { if(pCurOutBuf[15] < 0x10) { OutLength = InputLen - pCurOutBuf[15]; memcpy( temp, pCurOutBuf, 16-pCurOutBuf[15] ); memcpy( pCurOutBuf, temp, 16 ); } else break; } else { OutLength = InputLen - 16; memcpy( pCurOutBuf, temp, 16 ); } } pCurInBuf+=16; pCurOutBuf+=16; } return OutLength; } void test(){ int i=0; unsigned long outlen; unsigned char in[]={0x63,0xf4,0xf0,0x60,0x60,0x60,0xb8,0x62,0xa8,0x67,0xac,0x67,0xc9,0x80,0x1b,0xa4,0x18,0xa7,0x18,0x99,0x5a,0x9a,0x25,0x5b,0x18,0x19,0x5b,0x58,0x1a,0xa5,0x19,0x99,0x99,0x59,0x5a,0x1a,0xa4,0x58,0xa6,0x26,0x19,0x1a,0xa5,0xa5,0x99,0x5a,0x18,0x32,0x28,0x7f,0x60,0x00,0x00};//5*16+2 = 82 unsigned char out_data[96]={0}; unsigned char in_data[96]={0}; unsigned char key[]={"SFKJ201800001400"}; unsigned char iv[20] = {0};//偏移量 outlen=AES128_CBC_Encrypt(in,53,key,out_data,iv); printf("Encrypt_data: "); for(i=0;i<outlen;i++) { if(i%16==0)printf("\n"); printf("%02x ",out_data[i]); } memset(iv,0,20); outlen=AES128_CBC_Decrypt(out_data,64,key,in_data,iv); printf("\n\nDecrypt_data: "); for(i=0;i<outlen;i++) { if(i%16==0)printf("\n"); printf("%02x ",in_data[i]); } printf("\n\n\n"); }