aesc語言

③ 求C語言的AES加密代碼 能用的貼出來吧 給滿分

#include "stdio.h"
#include "memory.h"
#include "time.h"
#include "stdlib.h"

#define PLAIN_FILE_OPEN_ERROR -1
#define KEY_FILE_OPEN_ERROR -2
#define CIPHER_FILE_OPEN_ERROR -3
#define OK 1

typedef char ElemType;

/*初始置換表IP*/
int IP_Table[64] = { 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};
/*逆初始置換表IP^-1*/
int IP_1_Table[64] = {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};

/*擴充置換表E*/
int E_Table[48] = {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};

/*置換函數P*/
int P_Table[32] = {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*/
int S[8][4][16] =
/*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*/
{{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}}};
/*置換選擇1*/
int PC_1[56] = {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};

/*置換選擇2*/
int PC_2[48] = {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};

/*對左移次數的規定*/
int MOVE_TIMES[16] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};

int ByteToBit(ElemType ch,ElemType bit[8]);
int BitToByte(ElemType bit[8],ElemType *ch);
int Char8ToBit64(ElemType ch[8],ElemType bit[64]);
int Bit64ToChar8(ElemType bit[64],ElemType ch[8]);
int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]);
int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]);
int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]);
int DES_ROL(ElemType data[56], int time);
int DES_IP_Transform(ElemType data[64]);
int DES_IP_1_Transform(ElemType data[64]);
int DES_E_Transform(ElemType data[48]);
int DES_P_Transform(ElemType data[32]);
int DES_SBOX(ElemType data[48]);
int DES_XOR(ElemType R[48], ElemType L[48],int count);
int DES_Swap(ElemType left[32],ElemType right[32]);
int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]);
int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48], ElemType plainBlock[8]);
int DES_Encrypt(char *plainFile, char *keyStr,char *cipherFile);
int DES_Decrypt(char *cipherFile, char *keyStr,char *plainFile);

/*位元組轉換成二進制*/
int ByteToBit(ElemType ch, ElemType bit[8]){
int cnt;
for(cnt = 0;cnt < 8; cnt++){
*(bit+cnt) = (ch>>cnt)&1;
}
return 0;
}

/*二進制轉換成位元組*/
int BitToByte(ElemType bit[8],ElemType *ch){
int cnt;
for(cnt = 0;cnt < 8; cnt++){
*ch |= *(bit + cnt)<<cnt;
}
return 0;
}

/*將長度為8的字元串轉為二進制位串*/
int Char8ToBit64(ElemType ch[8],ElemType bit[64]){
int cnt;
for(cnt = 0; cnt < 8; cnt++){
ByteToBit(*(ch+cnt),bit+(cnt<<3));
}
return 0;
}

/*將二進制位串轉為長度為8的字元串*/
int Bit64ToChar8(ElemType bit[64],ElemType ch[8]){
int cnt;
memset(ch,0,8);
for(cnt = 0; cnt < 8; cnt++){
BitToByte(bit+(cnt<<3),ch+cnt);
}
return 0;
}

/*生成子密鑰*/
int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]){
ElemType temp[56];
int cnt;
DES_PC1_Transform(key,temp);/*PC1置換*/
for(cnt = 0; cnt < 16; cnt++){/*16輪跌代，產生16個子密鑰*/
DES_ROL(temp,MOVE_TIMES[cnt]);/*循環左移*/
DES_PC2_Transform(temp,subKeys[cnt]);/*PC2置換，產生子密鑰*/
}
return 0;
}

/*密鑰置換1*/
int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]){
int cnt;
for(cnt = 0; cnt < 56; cnt++){
tempbts[cnt] = key[PC_1[cnt]];
}
return 0;
}

/*密鑰置換2*/
int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]){
int cnt;
for(cnt = 0; cnt < 48; cnt++){
tempbts[cnt] = key[PC_2[cnt]];
}
return 0;
}

/*循環左移*/
int DES_ROL(ElemType data[56], int time){
ElemType temp[56];

/*保存將要循環移動到右邊的位*/
memcpy(temp,data,time);
memcpy(temp+time,data+28,time);

/*前28位移動*/
memcpy(data,data+time,28-time);
memcpy(data+28-time,temp,time);

/*後28位移動*/
memcpy(data+28,data+28+time,28-time);
memcpy(data+56-time,temp+time,time);

return 0;
}

/*IP置換*/
int DES_IP_Transform(ElemType data[64]){
int cnt;
ElemType temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}

/*IP逆置換*/
int DES_IP_1_Transform(ElemType data[64]){
int cnt;
ElemType temp[64];
for(cnt = 0; cnt < 64; cnt++){
temp[cnt] = data[IP_1_Table[cnt]];
}
memcpy(data,temp,64);
return 0;
}

/*擴展置換*/
int DES_E_Transform(ElemType data[48]){
int cnt;
ElemType temp[48];
for(cnt = 0; cnt < 48; cnt++){
temp[cnt] = data[E_Table[cnt]];
}
memcpy(data,temp,48);
return 0;
}

/*P置換*/
int DES_P_Transform(ElemType data[32]){
int cnt;
ElemType temp[32];
for(cnt = 0; cnt < 32; cnt++){
temp[cnt] = data[P_Table[cnt]];
}
memcpy(data,temp,32);
return 0;
}

/*異或*/
int DES_XOR(ElemType R[48], ElemType L[48] ,int count){
int cnt;
for(cnt = 0; cnt < count; cnt++){
R[cnt] ^= L[cnt];
}
return 0;
}

/*S盒置換*/
int DES_SBOX(ElemType data[48]){
int cnt;
int line,row,output;
int cur1,cur2;
for(cnt = 0; cnt < 8; cnt++){
cur1 = cnt*6;
cur2 = cnt<<2;

/*計算在S盒中的行與列*/
line = (data[cur1]<<1) + data[cur1+5];
row = (data[cur1+1]<<3) + (data[cur1+2]<<2)
+ (data[cur1+3]<<1) + data[cur1+4];
output = S[cnt][line][row];

/*化為2進制*/
data[cur2] = (output&0X08)>>3;
data[cur2+1] = (output&0X04)>>2;
data[cur2+2] = (output&0X02)>>1;
data[cur2+3] = output&0x01;
}
return 0;
}

/*交換*/
int DES_Swap(ElemType left[32], ElemType right[32]){
ElemType temp[32];
memcpy(temp,left,32);
memcpy(left,right,32);
memcpy(right,temp,32);
return 0;
}

/*加密單個分組*/
int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]){
ElemType plainBits[64];
ElemType Right[48];
int cnt;

Char8ToBit64(plainBlock,plainBits);
/*初始置換（IP置換）*/
DES_IP_Transform(plainBits);

/*16輪迭代*/
for(cnt = 0; cnt < 16; cnt++){
memcpy(Right,plainBits+32,32);
/*將右半部分進行擴展置換，從32位擴展到48位*/
DES_E_Transform(Right);
/*將右半部分與子密鑰進行異或操作*/
DES_XOR(Right,subKeys[cnt],48);
/*異或結果進入S盒，輸出32位結果*/
DES_SBOX(Right);
/*P置換*/
DES_P_Transform(Right);
/*將明文左半部分與右半部分進行異或*/
DES_XOR(plainBits,Right,32);
if(cnt != 15){
/*最終完成左右部的交換*/
DES_Swap(plainBits,plainBits+32);
}
}
/*逆初始置換（IP^1置換）*/
DES_IP_1_Transform(plainBits);
Bit64ToChar8(plainBits,cipherBlock);
return 0;
}

/*解密單個分組*/
int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48],ElemType plainBlock[8]){
ElemType cipherBits[64];
ElemType Right[48];
int cnt;

Char8ToBit64(cipherBlock,cipherBits);
/*初始置換（IP置換）*/
DES_IP_Transform(cipherBits);

/*16輪迭代*/
for(cnt = 15; cnt >= 0; cnt--){
memcpy(Right,cipherBits+32,32);
/*將右半部分進行擴展置換，從32位擴展到48位*/
DES_E_Transform(Right);
/*將右半部分與子密鑰進行異或操作*/
DES_XOR(Right,subKeys[cnt],48);
/*異或結果進入S盒，輸出32位結果*/
DES_SBOX(Right);
/*P置換*/
DES_P_Transform(Right);
/*將明文左半部分與右半部分進行異或*/
DES_XOR(cipherBits,Right,32);
if(cnt != 0){
/*最終完成左右部的交換*/
DES_Swap(cipherBits,cipherBits+32);
}
}
/*逆初始置換（IP^1置換）*/
DES_IP_1_Transform(cipherBits);
Bit64ToChar8(cipherBits,plainBlock);
return 0;
}

/*加密文件*/
int DES_Encrypt(char *plainFile, char *keyStr,char *cipherFile){
FILE *plain,*cipher;
int count;
ElemType plainBlock[8],cipherBlock[8],keyBlock[8];
ElemType bKey[64];
ElemType subKeys[16][48];
if((plain = fopen(plainFile,"rb")) == NULL){
return PLAIN_FILE_OPEN_ERROR;
}
if((cipher = fopen(cipherFile,"wb")) == NULL){
return CIPHER_FILE_OPEN_ERROR;
}
/*設置密鑰*/
memcpy(keyBlock,keyStr,8);
/*將密鑰轉換為二進制流*/
Char8ToBit64(keyBlock,bKey);
/*生成子密鑰*/
DES_MakeSubKeys(bKey,subKeys);

while(!feof(plain)){
/*每次讀8個位元組，並返回成功讀取的位元組數*/
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);
/*最後一個字元保存包括最後一個字元在內的所填充的字元數量*/
plainBlock[7] = 8 - count;
DES_EncryptBlock(plainBlock,subKeys,cipherBlock);
fwrite(cipherBlock,sizeof(char),8,cipher);
}
fclose(plain);
fclose(cipher);
return OK;
}

/*解密文件*/
int DES_Decrypt(char *cipherFile, char *keyStr,char *plainFile){
FILE *plain, *cipher;
int count,times = 0;
long fileLen;
ElemType plainBlock[8],cipherBlock[8],keyBlock[8];
ElemType bKey[64];
ElemType subKeys[16][48];
if((cipher = fopen(cipherFile,"rb")) == NULL){
return CIPHER_FILE_OPEN_ERROR;
}
if((plain = fopen(plainFile,"wb")) == NULL){
return PLAIN_FILE_OPEN_ERROR;
}

/*設置密鑰*/
memcpy(keyBlock,keyStr,8);
/*將密鑰轉換為二進制流*/
Char8ToBit64(keyBlock,bKey);
/*生成子密鑰*/
DES_MakeSubKeys(bKey,subKeys);

/*取文件長度 */
fseek(cipher,0,SEEK_END);/*將文件指針置尾*/
fileLen = ftell(cipher); /*取文件指針當前位置*/
rewind(cipher); /*將文件指針重指向文件頭*/
while(1){
/*密文的位元組數一定是8的整數倍*/
fread(cipherBlock,sizeof(char),8,cipher);
DES_DecryptBlock(cipherBlock,subKeys,plainBlock);
times += 8;
if(times < fileLen){
fwrite(plainBlock,sizeof(char),8,plain);
}
else{
break;
}
}
/*判斷末尾是否被填充*/
if(plainBlock[7] < 8){
for(count = 8 - plainBlock[7]; count < 7; count++){
if(plainBlock[count] != '\0'){
break;
}
}
}
if(count == 7){/*有填充*/
fwrite(plainBlock,sizeof(char),8 - plainBlock[7],plain);
}
else{/*無填充*/
fwrite(plainBlock,sizeof(char),8,plain);
}

fclose(plain);
fclose(cipher);
return OK;
}

int main()
{
clock_t a,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();
return 0;
}

④ aes演算法c語言實現

http://wenku..com/link?url=__-4vlYsYV62kNnt7l9SF3 這里很多，如果不是專門弄這個的很少會去研究的。

專門弄這個的人自己的代碼很少給出來的。。

⑤ 用C語言編寫AES加密演算法，遇到問題。

一行行列印語句，問題的核心沒有講出來，大家怎麼幫你呢，我們只能保證這個列印過程是正確的。

⑥ 求純C語言的加密解密演算法編碼（AES、DES。。。。。。）

請選擇參考資料的網頁
BeeCrypt 是一個包含高度優化的C語言加密庫，包括MD5，SHA－等多種加密解密演算法，該庫是通用函數庫，並與任何版權無關。符合GNU開放源碼要求

點擊下列連接可以直接下載源代碼

http://prdownloads.sourceforge.net/beecrypt/beecrypt-4.1.2.tar.gz?download

⑦ 誰會用C語言實現AES演算法，謝謝

1 AES加密、解密演算法原理和AVR實現

AES是分組密鑰，演算法輸入128位數據，密鑰長度也是128位。用Nr表示對一個數據分組加密的輪數（加密輪數與密鑰長度的關系如表1所列）。每一輪都需要一個與輸入分組具有相同長度的擴展密鑰Expandedkey(i)的參與。由於外部輸入的加密密鑰K長度有限,所以在演算法中要用一個密鑰擴展程序(Keyexpansion)把外部密鑰K擴展成更長的比特串,以生成各輪的加密和解密密鑰。

1.1圈變化
AES每一個圈變換由以下三個層組成:
非線性層——進行Subbyte變換；
線行混合層——進行ShiftRow和MixColumn運算；
密鑰加層——進行AddRoundKey運算。

① Subbyte變換是作用在狀態中每個位元組上的一種非線性位元組轉換,可以通過計算出來的S盒進行映射。
Schange:
ldi zh,＄01;將指針指向S盒的首地址
mov zl,r2；將要查找的數據作為指針低地址
ldtemp,z+；取出這個對應的數據
mov r2,temp；交換數據完成查表
.
.
.
ret

② ShiftRow是一個位元組換位。它將狀態中的行按照不同的偏移量進行循環移位，而這個偏移量也是根據Nb的不同而選擇的[3]。
shiftrow:;這是一個位元組換位的子程序
mov temp,r3;因為是4×4
mov r3,r7; r2 r6 r10 r14 r2 r6 r10 r14
mov r7,r11; r3 r7 r11 r15---r7 r11 r15 r3
mov r11,r15; r4 r8 r12 r17 r12 r17 r4 r8
mov r15,temp; r5 r9 r13 r18 r18 r5 r9 r13
mov temp,r4
mov temp1,r8
mov r4,r12
mov r8,r17
mov r12,temp
mov r17,temp1
mov temp,r18
mov r18,r13
mov r13,r9
mov r9,r5
mov r5,temp
ret

③ 在MixColumn變換中,把狀態中的每一列看作GF(28)上的多項式a(x)與固定多項式c(x)相乘的結果。b(x)=c(x)*a(x)的系數這樣計算:*運算不是普通的乘法運算,而是特殊的運算，即
b(x)=c(x)·a(x)(mod x4+1)
對於這個運算
b0=02。a0+03。a1+a2+a3
令xtime(a0)=02。a0
其中，符號「。」表示模一個八次不可約多項式的同餘乘法[3]。
mov temp,a0;這是一個mixcolimn子程序
rcall xtime;調用xtime程序
mov a0,temp
mov temp,a1
rcall xtime
eor a0,a1
eor a0,temp
eor a0,a2
eor a0,a3;完成b(x)的計算
.
.
.
xtime:;這是一個子程序
ldi temp1,＄1b
lsl temp
brcs next1;如果最高位是1,則轉移
next: ret;否則什麼也不變化
next1:eor temp,temp1
rjmp next

對於逆變化,其矩陣C要改變成相應的D,即b(x)=d(x)＊a(x)。

④ 密鑰加層運算(addround)是將圈密鑰狀態中的對應位元組按位「異或」。

⑤ 根據線性變化的性質[1],解密運算是加密變化的逆變化。這里不再詳細敘述。

1.2輪變化

對不同的分組長度，其對應的輪變化次數是不同的,如表1所列。

1.3密鑰擴展
AES演算法利用外部輸入密鑰K(密鑰串的字數為Nk),通過密鑰的擴展程序得到共計4(Nr+1)字的擴展密鑰。它涉及如下三個模塊:

① 位置變換(rotword)——把一個4位元組的序列[A,B,C,D]變化成[B,C,D,A]；

② S盒變換(subword)——對一個4位元組進行S盒代替；

③ 變換Rcon[i]——Rcon[i]表示32位比特字[xi-1,00,00,00]。這里的x是（02），如
Rcon[1]=[01000000]；Rcon[2]=[02000000]；Rcon[3]=[04000000]……

擴展密鑰的生成：擴展密鑰的前Nk個字就是外部密鑰K；以後的字W[[i]]等於它前一個字W[[i-1]]與前第Nk個字W[[i-Nk]]的「異或」,即W[[i]]=W[[i-1]]�W[[i- Nk]]。但是若i為Nk的倍數,則W[i]=W[i-Nk]�Subword(Rotword(W[[i-1]]))�Rcon[i/Nk]。

程序執行的時候,主要調用以上幾個子程序，具體實現如下：
Keyexpansion:
rcall rotwoed
rcall subword
rcall Rcon
.
.
.

2 AES加密、解密演算法的優化

由以上演算法的流程中可以清楚地看到，整個演算法中程序耗時最多的就是圈變化部分，因此對於演算法的優化也就在此；而圈變化部分可以優化的也就是列變化。因為列變化是一個模乘同餘規則。由於AES加密和解密是不對稱的,如果不對其進行優化,會使演算法的解密速度遠遠大於加密的速度[1]。

① 加密運算。對列變換（Mixcolumn）可以通過調用xtime子程序進行優化。

另一種有效的優化方法就是離線構造一個表格，即列變化表格。這樣只要通過查表的方式就可以提高加密速度。

② 解密演算法的優化。由於解密的列變換的系數分別是09、0E、0B和0D。在AVR單片機上實現以上的乘法顯然是需要很多的時間,從而導致了解密的性能降低。

優化方法一：對列變化進行分解使倍乘次數降低。

仔細研究解密矩陣的系數，不難發現解密矩陣和加密矩陣有著一定的聯系，即解密矩陣等於加密矩陣和一個矩陣的相乘。通過這樣的聯系，就可以對演算法進行優化：

這樣一來,只用幾個簡單的「異或」就可以實現列變化，使倍乘的次數降低,提高解密的速度。
優化方法二：構造表格。

同加密構造方法一樣，可以構造四個表格T[ea]=e×a; T[9a]=9×a;T[9a]=9×a;T[ba]=b×a。這樣一來，也只需要進行查表和簡單的異或就可以完成解密的任務。雖然這種方法將增加額外的開銷,但是它卻是一種有效的方法。

3 AES加密與解密的實驗模擬

根據以上實驗步驟和優化方法得出表2、3所列實驗結果。

設主密鑰為:(128bit)。
加密明文:。
密文:。
解密密文:。
明文:。

總之,AES密碼是一個非對稱密碼體制，它的解密要比加密復雜和費時。解密優化演算法沒有增加存儲空間的基礎上,以列變化為基礎進行處理，程序比原始的要小，而且節約了時間。解密優化方法速度最快，效率最高，但要增加系統的存儲空間,因此它的程序也是最大的一個
流程圖省略 朋友參考吧

⑧ 求AES演算法加密C語言完整程序

恰好我有。能運行的，C語言的。

#include <string.h>
#include "aes.h"
#include "commonage.h"

#define byte unsigned char

#define BPOLY 0x1b //!< Lower 8 bits of (x^8+x^4+x^3+x+1), ie. (x^4+x^3+x+1).
#define BLOCKSIZE 16 //!< Block size in number of bytes.

#define KEYBITS 128 //!< Use AES128.
#define ROUNDS 10 //!< Number of rounds.
#define KEYLENGTH 16 //!< Key length in number of bytes.

byte xdata block1[ 256 ]; //!< Workspace 1.
byte xdata block2[ 256 ]; //!< Worksapce 2.

byte xdata * powTbl; //!< Final location of exponentiation lookup table.
byte xdata * logTbl; //!< Final location of logarithm lookup table.
byte xdata * sBox; //!< Final location of s-box.
byte xdata * sBoxInv; //!< Final location of inverse s-box.
byte xdata * expandedKey; //!< Final location of expanded key.

void CalcPowLog( byte * powTbl, byte * logTbl )
{
byte xdata i = 0;
byte xdata t = 1;

do {
// Use 0x03 as root for exponentiation and logarithms.
powTbl[i] = t;
logTbl[t] = i;
i++;

// Muliply t by 3 in GF(2^8).
t ^= (t << 1) ^ (t & 0x80 ? BPOLY : 0);
} while( t != 1 ); // Cyclic properties ensure that i < 255.

powTbl[255] = powTbl[0]; // 255 = '-0', 254 = -1, etc.
}

void CalcSBox( byte * sBox )
{
byte xdata i, rot;
byte xdata temp;
byte xdata result;

// Fill all entries of sBox[].
i = 0;
do {
// Inverse in GF(2^8).
if( i > 0 ) {
temp = powTbl[ 255 - logTbl[i] ];
} else {
temp = 0;
}

// Affine transformation in GF(2).
result = temp ^ 0x63; // Start with adding a vector in GF(2).
for( rot = 0; rot < 4; rot++ ) {
// Rotate left.
temp = (temp<<1) | (temp>>7);

// Add rotated byte in GF(2).
result ^= temp;
}

// Put result in table.
sBox[i] = result;
} while( ++i != 0 );
}

void CalcSBoxInv( byte * sBox, byte * sBoxInv )
{
byte xdata i = 0;
byte xdata j = 0;

// Iterate through all elements in sBoxInv using i.
do {
// Search through sBox using j.
cleardog();
do {
// Check if current j is the inverse of current i.
if( sBox[ j ] == i ) {
// If so, set sBoxInc and indicate search finished.
sBoxInv[ i ] = j;
j = 255;
}
} while( ++j != 0 );
} while( ++i != 0 );
}

void CycleLeft( byte * row )
{
// Cycle 4 bytes in an array left once.
byte xdata temp = row[0];
row[0] = row[1];
row[1] = row[2];
row[2] = row[3];
row[3] = temp;
}

void InvMixColumn( byte * column )
{
byte xdata r0, r1, r2, r3;

r0 = column[1] ^ column[2] ^ column[3];
r1 = column[0] ^ column[2] ^ column[3];
r2 = column[0] ^ column[1] ^ column[3];
r3 = column[0] ^ column[1] ^ column[2];

column[0] = (column[0] << 1) ^ (column[0] & 0x80 ? BPOLY : 0);
column[1] = (column[1] << 1) ^ (column[1] & 0x80 ? BPOLY : 0);
column[2] = (column[2] << 1) ^ (column[2] & 0x80 ? BPOLY : 0);
column[3] = (column[3] << 1) ^ (column[3] & 0x80 ? BPOLY : 0);

r0 ^= column[0] ^ column[1];
r1 ^= column[1] ^ column[2];
r2 ^= column[2] ^ column[3];
r3 ^= column[0] ^ column[3];

column[0] = (column[0] << 1) ^ (column[0] & 0x80 ? BPOLY : 0);
column[1] = (column[1] << 1) ^ (column[1] & 0x80 ? BPOLY : 0);
column[2] = (column[2] << 1) ^ (column[2] & 0x80 ? BPOLY : 0);
column[3] = (column[3] << 1) ^ (column[3] & 0x80 ? BPOLY : 0);

r0 ^= column[0] ^ column[2];
r1 ^= column[1] ^ column[3];
r2 ^= column[0] ^ column[2];
r3 ^= column[1] ^ column[3];

column[0] = (column[0] << 1) ^ (column[0] & 0x80 ? BPOLY : 0);
column[1] = (column[1] << 1) ^ (column[1] & 0x80 ? BPOLY : 0);
column[2] = (column[2] << 1) ^ (column[2] & 0x80 ? BPOLY : 0);
column[3] = (column[3] << 1) ^ (column[3] & 0x80 ? BPOLY : 0);

column[0] ^= column[1] ^ column[2] ^ column[3];
r0 ^= column[0];
r1 ^= column[0];
r2 ^= column[0];
r3 ^= column[0];

column[0] = r0;
column[1] = r1;
column[2] = r2;
column[3] = r3;
}

byte Multiply( unsigned char num, unsigned char factor )
{
byte mask = 1;
byte result = 0;

while( mask != 0 ) {
// Check bit of factor given by mask.
if( mask & factor ) {
// Add current multiple of num in GF(2).
result ^= num;
}

// Shift mask to indicate next bit.
mask <<= 1;

// Double num.
num = (num << 1) ^ (num & 0x80 ? BPOLY : 0);
}

return result;
}

byte DotProct( unsigned char * vector1, unsigned char * vector2 )
{
byte result = 0;

result ^= Multiply( *vector1++, *vector2++ );
result ^= Multiply( *vector1++, *vector2++ );
result ^= Multiply( *vector1++, *vector2++ );
result ^= Multiply( *vector1 , *vector2 );

return result;
}

void MixColumn( byte * column )
{
byte xdata row[8] = {
0x02, 0x03, 0x01, 0x01,
0x02, 0x03, 0x01, 0x01
}; // Prepare first row of matrix twice, to eliminate need for cycling.

byte xdata result[4];

// Take dot procts of each matrix row and the column vector.
result[0] = DotProct( row+0, column );
result[1] = DotProct( row+3, column );
result[2] = DotProct( row+2, column );
result[3] = DotProct( row+1, column );

// Copy temporary result to original column.
column[0] = result[0];
column[1] = result[1];
column[2] = result[2];
column[3] = result[3];
}

void SubBytes( byte * bytes, byte count )
{
do {
*bytes = sBox[ *bytes ]; // Substitute every byte in state.
bytes++;
} while( --count );
}

void InvSubBytesAndXOR( byte * bytes, byte * key, byte count )
{
do {
// *bytes = sBoxInv[ *bytes ] ^ *key; // Inverse substitute every byte in state and add key.
*bytes = block2[ *bytes ] ^ *key; // Use block2 directly. Increases speed.
bytes++;
key++;
} while( --count );
}

void InvShiftRows( byte * state )
{
byte temp;

// Note: State is arranged column by column.

// Cycle second row right one time.
temp = state[ 1 + 3*4 ];
state[ 1 + 3*4 ] = state[ 1 + 2*4 ];
state[ 1 + 2*4 ] = state[ 1 + 1*4 ];
state[ 1 + 1*4 ] = state[ 1 + 0*4 ];
state[ 1 + 0*4 ] = temp;

// Cycle third row right two times.
temp = state[ 2 + 0*4 ];
state[ 2 + 0*4 ] = state[ 2 + 2*4 ];
state[ 2 + 2*4 ] = temp;
temp = state[ 2 + 1*4 ];
state[ 2 + 1*4 ] = state[ 2 + 3*4 ];
state[ 2 + 3*4 ] = temp;

// Cycle fourth row right three times, ie. left once.
temp = state[ 3 + 0*4 ];
state[ 3 + 0*4 ] = state[ 3 + 1*4 ];
state[ 3 + 1*4 ] = state[ 3 + 2*4 ];
state[ 3 + 2*4 ] = state[ 3 + 3*4 ];
state[ 3 + 3*4 ] = temp;
}

void ShiftRows( byte * state )
{
byte temp;

// Note: State is arranged column by column.

// Cycle second row left one time.
temp = state[ 1 + 0*4 ];
state[ 1 + 0*4 ] = state[ 1 + 1*4 ];
state[ 1 + 1*4 ] = state[ 1 + 2*4 ];
state[ 1 + 2*4 ] = state[ 1 + 3*4 ];
state[ 1 + 3*4 ] = temp;

// Cycle third row left two times.
temp = state[ 2 + 0*4 ];
state[ 2 + 0*4 ] = state[ 2 + 2*4 ];
state[ 2 + 2*4 ] = temp;
temp = state[ 2 + 1*4 ];
state[ 2 + 1*4 ] = state[ 2 + 3*4 ];
state[ 2 + 3*4 ] = temp;

// Cycle fourth row left three times, ie. right once.
temp = state[ 3 + 3*4 ];
state[ 3 + 3*4 ] = state[ 3 + 2*4 ];
state[ 3 + 2*4 ] = state[ 3 + 1*4 ];
state[ 3 + 1*4 ] = state[ 3 + 0*4 ];
state[ 3 + 0*4 ] = temp;
}

void InvMixColumns( byte * state )
{
InvMixColumn( state + 0*4 );
InvMixColumn( state + 1*4 );
InvMixColumn( state + 2*4 );
InvMixColumn( state + 3*4 );
}

void MixColumns( byte * state )
{
MixColumn( state + 0*4 );
MixColumn( state + 1*4 );
MixColumn( state + 2*4 );
MixColumn( state + 3*4 );
}

void XORBytes( byte * bytes1, byte * bytes2, byte count )
{
do {
*bytes1 ^= *bytes2; // Add in GF(2), ie. XOR.
bytes1++;
bytes2++;
} while( --count );
}

void CopyBytes( byte * to, byte * from, byte count )
{
do {
*to = *from;
to++;
from++;
} while( --count );
}

void KeyExpansion( byte * expandedKey )
{
byte xdata temp[4];
byte i;
byte xdata Rcon[4] = { 0x01, 0x00, 0x00, 0x00 }; // Round constant.

unsigned char xdata *key;
unsigned char xdata a[16];
key=a;
//以下為加解密密碼，共16位元組。可以選擇任意值
key[0]=0x30;
key[1]=0x30;
key[2]=0x30;
key[3]=0x30;
key[4]=0x30;
key[5]=0x30;
key[6]=0x30;
key[7]=0x30;
key[8]=0x30;
key[9]=0x30;
key[10]=0x30;
key[11]=0x30;
key[12]=0x30;
key[13]=0x30;
key[14]=0x30;
key[15]=0x30;
////////////////////////////////////////////

// Copy key to start of expanded key.
i = KEYLENGTH;
do {
*expandedKey = *key;
expandedKey++;
key++;
} while( --i );

// Prepare last 4 bytes of key in temp.
expandedKey -= 4;
temp[0] = *(expandedKey++);
temp[1] = *(expandedKey++);
temp[2] = *(expandedKey++);
temp[3] = *(expandedKey++);

// Expand key.
i = KEYLENGTH;
while( i < BLOCKSIZE*(ROUNDS+1) ) {
// Are we at the start of a multiple of the key size?
if( (i % KEYLENGTH) == 0 ) {
CycleLeft( temp ); // Cycle left once.
SubBytes( temp, 4 ); // Substitute each byte.
XORBytes( temp, Rcon, 4 ); // Add constant in GF(2).
*Rcon = (*Rcon << 1) ^ (*Rcon & 0x80 ? BPOLY : 0);
}

// Keysize larger than 24 bytes, ie. larger that 192 bits?
#if KEYLENGTH > 24
// Are we right past a block size?
else if( (i % KEYLENGTH) == BLOCKSIZE ) {
SubBytes( temp, 4 ); // Substitute each byte.
}
#endif

// Add bytes in GF(2) one KEYLENGTH away.
XORBytes( temp, expandedKey - KEYLENGTH, 4 );

// Copy result to current 4 bytes.
*(expandedKey++) = temp[ 0 ];
*(expandedKey++) = temp[ 1 ];
*(expandedKey++) = temp[ 2 ];
*(expandedKey++) = temp[ 3 ];

i += 4; // Next 4 bytes.
}
}

void InvCipher( byte * block, byte * expandedKey )
{
byte round = ROUNDS-1;
expandedKey += BLOCKSIZE * ROUNDS;

XORBytes( block, expandedKey, 16 );
expandedKey -= BLOCKSIZE;

do {
InvShiftRows( block );
InvSubBytesAndXOR( block, expandedKey, 16 );
expandedKey -= BLOCKSIZE;
InvMixColumns( block );
} while( --round );

InvShiftRows( block );
InvSubBytesAndXOR( block, expandedKey, 16 );
}

void Cipher( byte * block, byte * expandedKey ) //完成一個塊(16位元組，128bit)的加密
{
byte round = ROUNDS-1;

XORBytes( block, expandedKey, 16 );
expandedKey += BLOCKSIZE;

do {
SubBytes( block, 16 );
ShiftRows( block );
MixColumns( block );
XORBytes( block, expandedKey, 16 );
expandedKey += BLOCKSIZE;
} while( --round );

SubBytes( block, 16 );
ShiftRows( block );
XORBytes( block, expandedKey, 16 );
}

void aesInit( unsigned char * tempbuf )
{
powTbl = block1;
logTbl = block2;
CalcPowLog( powTbl, logTbl );

sBox = tempbuf;
CalcSBox( sBox );

expandedKey = block1; //至此block1用來存貯密碼表
KeyExpansion( expandedKey );

sBoxInv = block2; // Must be block2. block2至此開始只用來存貯SBOXINV
CalcSBoxInv( sBox, sBoxInv );
}

//對一個16位元組塊解密,參數buffer是解密密緩存，chainBlock是要解密的塊
void aesDecrypt( unsigned char * buffer, unsigned char * chainBlock )
{
//byte xdata temp[ BLOCKSIZE ];

//CopyBytes( temp, buffer, BLOCKSIZE );
CopyBytes(buffer,chainBlock,BLOCKSIZE);
InvCipher( buffer, expandedKey );
//XORBytes( buffer, chainBlock, BLOCKSIZE );
CopyBytes( chainBlock, buffer, BLOCKSIZE );
}

//對一個16位元組塊完成加密，參數buffer是加密緩存，chainBlock是要加密的塊
void aesEncrypt( unsigned char * buffer, unsigned char * chainBlock )
{
CopyBytes( buffer, chainBlock, BLOCKSIZE );
//XORBytes( buffer, chainBlock, BLOCKSIZE );
Cipher( buffer, expandedKey );
CopyBytes( chainBlock, buffer, BLOCKSIZE );
}

//加解密函數，參數為加解密標志，要加解密的數據緩存起始指針，要加解密的數據長度（如果解密運算，必須是16的整數倍。）
unsigned char aesBlockDecrypt(bit Direct,unsigned char *ChiperDataBuf,unsigned char DataLen)
{
unsigned char xdata i;
unsigned char xdata Blocks;
unsigned char xdata sBoxbuf[256];
unsigned char xdata tempbuf[16];
unsigned long int xdata OrignLen=0; //未加密數據的原始長度

if(Direct==0)
{
*((unsigned char *)&OrignLen+3)=ChiperDataBuf[0];
*((unsigned char *)&OrignLen+2)=ChiperDataBuf[1];
*((unsigned char *)&OrignLen+1)=ChiperDataBuf[2];
*((unsigned char *)&OrignLen)=ChiperDataBuf[3];
DataLen=DataLen-4;
}
else
{
memmove(ChiperDataBuf+4,ChiperDataBuf,DataLen);
OrignLen=DataLen;
ChiperDataBuf[0]=OrignLen;
ChiperDataBuf[1]=OrignLen>>8;
ChiperDataBuf[2]=OrignLen>>16;
ChiperDataBuf[3]=OrignLen>>24;
}
cleardog();
aesInit(sBoxbuf); //初始化
if(Direct==0) //解密
{
Blocks=DataLen/16;
for(i=0;i<Blocks;i++)
{
cleardog();
aesDecrypt(tempbuf,ChiperDataBuf+4+16*i);
}
memmove(ChiperDataBuf,ChiperDataBuf+4,OrignLen);
cleardog();
return(OrignLen);
}
else //加密
{
if(DataLen%16!=0)
{
Blocks=DataLen/16+1;
//memset(ChiperDataBuf+4+Blocks*16-(DataLen%16),0x00,DataLen%16); //不足16位元組的塊補零處理
}
else
{
Blocks=DataLen/16;
}

for(i=0;i<Blocks;i++)
{
cleardog();
aesEncrypt(tempbuf,ChiperDataBuf+4+16*i);
}
cleardog();
return(Blocks*16+4);
}

}

//#endif
以上是C文件。以下是頭文件

#ifndef AES_H
#define AES_H

extern void aesInit( unsigned char * tempbuf );
extern void aesDecrypt(unsigned char *buffer, unsigned char *chainBlock);
extern void aesEncrypt( unsigned char * buffer, unsigned char * chainBlock );

extern void aesInit( unsigned char * tempbuf );
extern void aesDecrypt( unsigned char * buffer, unsigned char * chainBlock );
extern void aesEncrypt( unsigned char * buffer, unsigned char * chainBlock );

extern unsigned char aesBlockDecrypt(bit Direct,unsigned char *ChiperDataBuf,unsigned char DataLen);

#endif // AES_H

這是我根據網上程序改寫的。只支持128位加解密。沒有使用占內存很多的查表法。故運算速度會稍慢。

⑨ 誰知道哪裡有AES演算法加密，解密c++/C語言代碼

推薦用java，因為有現成的class給你用。。。如果用C++有好多東西需要自己寫。可能java裡面20行能搞定加密和解密的所有步驟，如果C++自己把所有演算法加上各種數據類型轉換之類的，無法估計多多少倍的代碼了。前提還是你已經會寫如果做密鑰。