AES加密算法c语言实现代码.pdf

AES加密算法c语言实现代码.pdf

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AES加密算法c语言实现代码#includestdio.h#includememory.h#includetime.h#includestdlib.h#definePLAIN_FILE_OPEN_ERROR-1#defineKEY_FILE_OPEN_ERROR-2#defineCIPHER_FILE_OPEN_ERROR-3#defineOK1typedefcharElemType;/*初始置换表IP*/intIP_Table64=57,49,41,33,25,17,9,1,59,51,43,35,27,19,11,3,61,53,45,37,29,21,13,5,63,55,47,39,31,23,15,7,56,48,40,32,24,16,8,0,58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,62,54,46,38,30,22,14,6;/*逆初始置换表IP-1*/intIP_1_Table64=39,7,47,15,55,23,63,31,38,6,46,14,54,22,62,30,37,5,45,13,53,21,61,29,36,4,44,12,52,20,60,28,35,3,43,11,51,19,59,27,34,2,42,10,50,18,58,26,33,1,41,9,49,17,57,25,32,0,40,8,48,16,56,24;/*扩充置换表E*/intE_Table48=31,0,1,2,3,4,3,4,5,6,7,8,7,8,9,10,11,12,11,12,13,14,15,16,15,16,17,18,19,20,19,20,21,22,23,24,23,24,25,26,27,28,27,28,29,30,31,0;/*置换函数P*/intP_Table32=15,6,19,20,28,11,27,16,0,14,22,25,4,17,30,9,1,7,23,13,31,26,2,8,18,12,29,5,21,10,3,24;/*S盒*/intS8416=/*S1*/14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8,4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13,/*S2*/15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,/*S3*/10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,/*S4*/7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14,/*S5*/2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14,11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3,/*S6*/第1页AES加密算法c语言实现代码12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,/*S7*/4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,/*S8*/13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11;/*置换选择1*/intPC_156=56,48,40,32,24,16,8,0,57,49,41,33,25,17,9,1,58,50,42,34,26,18,10,2,59,51,43,35,62,54,46,38,30,22,14,6,61,53,45,37,29,21,13,5,60,52,44,36,28,20,12,4,27,19,11,3;/*置换选择2*/intPC_248=13,16,10,23,0,4,2,27,14,5,20,9,22,18,11,3,25,7,15,6,26,19,12,1,40,51,30,36,46,54,29,39,50,44,32,46,43,48,38,55,33,52,45,41,49,35,28,31;/*对左移次数的规定*/intMOVE_TIMES16=1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1;intByteToBit（ElemTypech,ElemTypebit8）;intBitToByte（ElemTypebit8,ElemType*ch）;intChar8ToBit64（ElemTypech8,ElemTypebit64）;intBit64ToChar8（ElemTypebit64,ElemTypech8）;intDES_MakeSubKeys（ElemTypekey64,ElemTypesubKeys1648）;intDES_PC1_Transform（ElemTypekey64,ElemTypetempbts56）;intDES_PC2_Transform（ElemTypekey56,ElemTypetempbts48）;intDES_ROL（ElemTypedata56,inttime）;intDES_IP_Transform（ElemTypedata64）;intDES_IP_1_Transform（ElemTypedata64）;intDES_E_Transform（ElemTypedata48）;intDES_P_Transform（ElemTypedata32）;intDES_SBOX（ElemTypedata48）;intDES_XOR（ElemTypeR48,ElemTypeL48,intcount）;intDES_Swap（ElemTypeleft32,ElemTyperight32）;intDES_EncryptBlock（ElemTypeplainBlock8,ElemTypesubKeys1648,ElemTypecipherBlock8）;intDES_DecryptBlock（ElemTypecipherBlock8,ElemTypesubKeys1648,ElemTypeplainBlock8）;intDES_Encrypt（char*plainFile,char*keyStr,char*cipherFile）;intDES_Decrypt（char*cipherFile,char*keyStr,char*plainFile）;/*字节转换成二进制*/intByteToBit（ElemTypech,ElemTypebit8）intcnt;for（cnt=0;cntcnt）&1;return0;/*二进制转换成字节*/intBitToByte（ElemTypebit8,ElemType*ch）intcnt;for（cnt=0;cnt8;cnt+）*ch|=*（bit+cnt）cnt;return0;/*将长度为8的字符串转为二进制位串*/intChar8ToBit64（ElemTypech8,ElemTypebit64）第2页AES加密算法c语言实现代码intcnt;for（cnt=0;cnt8;cnt+）ByteToBit（*（ch+cnt）,bit+（cnt3）;return0;/*将二进制位串转为长度为8的字符串*/intBit64ToChar8（ElemTypebit64,ElemTypech8）intcnt;memset（ch,0,8）;for（cnt=0;cnt8;cnt+）BitToByte（bit+（cnt3）,ch+cnt）;return0;/*生成子密钥*/intDES_MakeSubKeys（ElemTypekey64,ElemTypesubKeys1648）ElemTypetemp56;intcnt;DES_PC1_Transform（key,temp）;/*PC1置换*/for（cnt=0;cnt16;cnt+）/*16轮跌代，产生16个子密钥*/DES_ROL（temp,MOVE_TIMEScnt）;/*循环左移*/DES_PC2_Transform（temp,subKeyscnt）;/*PC2置换，产生子密钥*/return0;/*密钥置换1*/intDES_PC1_Transform（ElemTypekey64,ElemTypetempbts56）intcnt;for（cnt=0;cnt56;cnt+）tempbtscnt=keyPC_1cnt;return0;/*密钥置换2*/intDES_PC2_Transform（ElemTypekey56,ElemTypetempbts48）intcnt;for（cnt=0;cnt48;cnt+）tempbtscnt=keyPC_2cnt;return0;/*循环左移*/intDES_ROL（ElemTypedata56,inttime）ElemTypetemp56;/*保存将要循环移动到右边的位*/memcpy（temp,data,time）;memcpy（temp+time,data+28,time）;/*前28位移动*/memcpy（data,data+time,28-time）;memcpy（data+28-time,temp,time）;/*后28位移动*/memcpy（data+28,data+28+time,28-time）;memcpy（data+56-time,temp+time,time）;return0;/*IP置换*/intDES_IP_Transform（ElemTypedata64）intcnt;ElemTypetemp64;for（cnt=0;cnt64;cnt+）tempcnt=dataIP_Tablecnt;memcpy（data,temp,64）;return0;第3页AES加密算法c语言实现代码/*IP逆置换*/intDES_IP_1_Transform（ElemTypedata64）intcnt;ElemTypetemp64;for（cnt=0;cnt64;cnt+）tempcnt=dataIP_1_Tablecnt;memcpy（data,temp,64）;return0;/*扩展置换*/intDES_E_Transform（ElemTypedata48）intcnt;ElemTypetemp48;for（cnt=0;cnt48;cnt+）tempcnt=dataE_Tablecnt;memcpy（data,temp,48）;return0;/*P置换*/intDES_P_Transform（ElemTypedata32）intcnt;ElemTypetemp32;for（cnt=0;cnt32;cnt+）tempcnt=dataP_Tablecnt;memcpy（data,temp,32）;return0;/*异或*/intDES_XOR（ElemTypeR48,ElemTypeL48,intcount）intcnt;for（cnt=0;cntcount;cnt+）Rcnt=Lcnt;return0;/*S盒置换*/intDES_SBOX（ElemTypedata48）intcnt;intline,row,output;intcur1,cur2;for（cnt=0;cnt8;cnt+）cur1=cnt*6;cur2=cnt2;/*计算在S盒中的行与列*/line=（datacur11）+datacur1+5;row=（datacur1+13）+（datacur1+22）+（datacur1+33;datacur2+1=（output&0X04）2;datacur2+2=（output&0X02）1;datacur2+3=output&0x01;return0;/*交换*/intDES_Swap（ElemTypeleft32,ElemTyperight32）ElemTypetemp32;memcpy（temp,left,32）;memcpy（left,right,32）;memcpy（right,temp,32）;return0;第4页AES加密算法c语言实现代码/*加密单个分组*/intDES_EncryptBlock（ElemTypeplainBlock8,ElemTypesubKeys1648,ElemTypecipherBlock8）ElemTypeplainBits64;ElemTypecopyRight48;intcnt;Char8ToBit64（plainBlock,plainBits）;/*初始置换（IP置换）*/DES_IP_Transform（plainBits）;/*16轮迭代*/for（cnt=0;cnt=0;cnt-）memcpy（copyRight,cipherBits+32,32）;/*将右半部分进行扩展置换，从32位扩展到48位*/DES_E_Transform（copyRight）;/*将右半部分与子密钥进行异或操作*/DES_XOR（copyRight,subKeyscnt,48）;/*异或结果进入S盒，输出32位结果*/DES_SBOX（copyRight）;/*P置换*/DES_P_Transform（copyRight）;/*将明文左半部分与右半部分进行异或*/DES_XOR（cipherBits,copyRight,32）;if（cnt!

=0）/*最终完成左右部的交换*/DES_Swap（cipherBits,cipherBits+32）;/*逆初始置换（IP1置换）*/DES_IP_1_Transform（cipherBits）;Bit64ToChar8（cipherBits,plainBlock）;return0;/*加密文件*/intDES_Encrypt（char*plainFile,char*keyStr,char*cipherFile）FILE*plain,*cipher;intcount;ElemTypeplainBlock8,cipherBlock8,keyBlock8;第5页AES加密算法c语言实现代码ElemTypebKey64;ElemTypesubKeys1648;if（plain=fopen（plainFile,rb）=NULL）returnPLAIN_FILE_OPEN_ERROR;if（cipher=fopen（cipherFile,wb）=NULL）returnCIPHER_FILE_OPEN_ERROR;/*设置密钥*/memcpy（keyBlock,keyStr,8）;/*将密钥转换为二进制流*/Char8ToBit64（keyBlock,bKey）;/*生成子密钥*/DES_MakeSubKeys（bKey,subKeys）;while（!

feof（plain）/*每次读8个字节，并返回成功读取的字节数*/if（count=fread（plainBlock,sizeof（char）,8,plain）=8）DES_EncryptBlock（plainBlock,subKeys,cipherBlock）;fwrite（cipherBlock,sizeof（char）,8,cipher）;if（count）/*填充*/memset（plainBlock+count,0,7-count）;/*最后一个字符保存包括最后一个字符在内的所填充的字符数量*/plainBlock7=8-count;DES_EncryptBlock（plainBlock,subKeys,cipherBlock）;fwrite（cipherBlock,sizeof（char）,8,cipher）;fclose（plain）;fclose（cipher）;returnOK;/*解密文件*/intDES_Decrypt（char*cipherFile,char*keyStr,char*plainFile）FILE*plain,*cipher;intcount,times=0;longfileLen;ElemTypeplainBlock8,cipherBlock8,keyBlock8;ElemTypebKey64;ElemTypesubKeys1648;if（cipher=fopen（cipherFile,rb）=NULL）returnCIPHER_FILE_OPEN_ERROR;if（plain=fopen（plainFile,wb）=NULL）returnPLAIN_FILE_OPEN_ERROR;/*设置密钥*/memcpy（keyBlock,keyStr,8）;/*将密钥转换为二进制流*/Char8ToBit64（keyBlock,bKey）;/*生成子密钥*/DES_MakeSubKeys（bKey,subKeys）;/*取文件长度*/fseek（cipher,0,SEEK_END）;/*将文件指针置尾*/fileLen=ftell（cipher）;/*取文件指针当前位置*/rewind（cipher）;/*将文件指针重指向文件头*/while

（1）/*密文的字节数一定是8的整数倍*/fread（cipherBlock,sizeof（char）,8,cipher）;DES_DecryptBlock（cipherBlock,subKeys,plainBlock）;times+=8;if（timesfileLen）fwrite（plainBlock,sizeof（char）,8,plain）;elsebreak;/*判断末尾是否被填充*/if（plainBlock78）第6页AES加密算法c语言实现代码for（count=8-plainBlock7;count7;count+）if（plainBlockcount!

=0）break;if（count=7）/*有填充*/fwrite（plainBlock,sizeof（char）,8-plainBlock7,plain）;else/*无填充*/fwrite（plainBlock,sizeof（char）,8,plain）;fclose（plain）;fclose（cipher）;returnOK;intmain（）clock_ta,b;a=clock（）;DES_Encrypt（1.txt,key.txt,2.txt）;b=clock（）;printf（加密消耗%d毫秒n,b-a）;system（pause）;a=clock（）;DES_Decrypt（2.txt,key.txt,3.txt）;b=clock（）;printf（解密消耗%d毫秒n,b-a）;getchar（）;return0;第7页