#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
/*初始置换表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}
/*逆初始置换表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}
/*扩充置换表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}
/*置换函数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}}}
/*置换选择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}
/*置换选择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}
/*对左移次数的规定*/
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)
/*字节转换成二进制*/
int ByteToBit(ElemType ch, ElemType bit[8]){
int cnt
for(cnt = 0cnt <8cnt++){
*(bit+cnt) = (ch>>cnt)&1
}
return 0
}
/*二进制转换成字节*/
int BitToByte(ElemType bit[8],ElemType *ch){
int cnt
for(cnt = 0cnt <8cnt++){
*ch |= *(bit + cnt)<<cnt
}
return 0
}
/*将长度为8的字符串转为二进制位串*/
int Char8ToBit64(ElemType ch[8],ElemType bit[64]){
int cnt
for(cnt = 0cnt <8cnt++){
ByteToBit(*(ch+cnt),bit+(cnt<<3))
}
return 0
}
/*将二进制位串转为长度为8的字符串*/
int Bit64ToChar8(ElemType bit[64],ElemType ch[8]){
int cnt
memset(ch,0,8)
for(cnt = 0cnt <8cnt++){
BitToByte(bit+(cnt<<3),ch+cnt)
}
return 0
}
/*生成子密钥*/
int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]){
ElemType temp[56]
int cnt
DES_PC1_Transform(key,temp)/*PC1置换*/
for(cnt = 0cnt <16cnt++){/*16轮跌代，产生16个子密钥*/
DES_ROL(temp,MOVE_TIMES[cnt])/*循环左移*/
DES_PC2_Transform(temp,subKeys[cnt])/*PC2置换，产生子密钥*/
}
return 0
}
/*密钥置换1*/
int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]){
int cnt
for(cnt = 0cnt <56cnt++){
tempbts[cnt] = key[PC_1[cnt]]
}
return 0
}
/*密钥置换2*/
int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]){
int cnt
for(cnt = 0cnt <48cnt++){
tempbts[cnt] = key[PC_2[cnt]]
}
return 0
}
/*循环左移*/
int DES_ROL(ElemType data[56], int time){
ElemType temp[56]
/*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)
return 0
}
/*IP置换*/
int DES_IP_Transform(ElemType data[64]){
int cnt
ElemType temp[64]
for(cnt = 0cnt <64cnt++){
temp[cnt] = data[IP_Table[cnt]]
}
memcpy(data,temp,64)
return 0
}
/*IP逆置换*/
int DES_IP_1_Transform(ElemType data[64]){
int cnt
ElemType temp[64]
for(cnt = 0cnt <64cnt++){
temp[cnt] = data[IP_1_Table[cnt]]
}
memcpy(data,temp,64)
return 0
}
/*扩展置换*/
int DES_E_Transform(ElemType data[48]){
int cnt
ElemType temp[48]
for(cnt = 0cnt <48cnt++){
temp[cnt] = data[E_Table[cnt]]
}
memcpy(data,temp,48)
return 0
}
/*P置换*/
int DES_P_Transform(ElemType data[32]){
int cnt
ElemType temp[32]
for(cnt = 0cnt <32cnt++){
temp[cnt] = data[P_Table[cnt]]
}
memcpy(data,temp,32)
return 0
}
/*异或*/
int DES_XOR(ElemType R[48], ElemType L[48] ,int count){
int cnt
for(cnt = 0cnt <countcnt++){
R[cnt] ^= L[cnt]
}
return 0
}
/*S盒置换*/
int DES_SBOX(ElemType data[48]){
int cnt
int line,row,output
int cur1,cur2
for(cnt = 0cnt <8cnt++){
cur1 = cnt*6
cur2 = cnt<<2
/*计算在S盒中的行与列*/
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]
/*化为2进制*/
data[cur2] = (output&0X08)>>3
data[cur2+1] = (output&0X04)>>2
data[cur2+2] = (output&0X02)>>1
data[cur2+3] = output&0x01
}
return 0
}
/*交换*/
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
}
/*加密单个分组*/
int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]){
ElemType plainBits[64]
ElemType copyRight[48]
int cnt
Char8ToBit64(plainBlock,plainBits)
/*初始置换（IP置换）*/
DES_IP_Transform(plainBits)
/*16轮迭代*/
for(cnt = 0cnt <16cnt++){
memcpy(copyRight,plainBits+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,subKeys[cnt],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(plainBits,copyRight,32)
if(cnt != 15){
/*最终完成左右部的交换*/
DES_Swap(plainBits,plainBits+32)
}
}
/*逆初始置换（IP^1置换）*/
DES_IP_1_Transform(plainBits)
Bit64ToChar8(plainBits,cipherBlock)
return 0
}
/*解密单个分组*/
int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48],ElemType plainBlock[8]){
ElemType cipherBits[64]
ElemType copyRight[48]
int cnt
Char8ToBit64(cipherBlock,cipherBits)
/*初始置换（IP置换）*/
DES_IP_Transform(cipherBits)
/*16轮迭代*/
for(cnt = 15cnt >= 0cnt--){
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,subKeys[cnt],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（IP^1置换）*/
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
}
/*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*/
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
}
/*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(times <fileLen){
fwrite(plainBlock,sizeof(char),8,plain)
}
else{
break
}
}
/*判断末尾是否被填充*/
if(plainBlock[7] <8){
for(count = 8 - plainBlock[7]count <7count++){
if(plainBlock[count] != '\0'){
break
}
}
}
if(count == 7){/*有填充*/
fwrite(plainBlock,sizeof(char),8 - plainBlock[7],plain)
}
else{/*无填充*/
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
}
#include <string.h>#include <stdio.h>
#include <stdlib.h>
#include <openssl/aes.h>
#include "encode.h"
int encode(char *content,int way)
{
AES_KEY aes
unsigned char key[AES_BLOCK_SIZE]
unsigned char iv[AES_BLOCK_SIZE]
unsigned char *encrypt_string
unsigned char *input_string
int len,i
/*Set Input string*/
if((strlen(content)+1)%AES_BLOCK_SIZE==0)
len=strlen(content)+1
else
len=((strlen(content)+1)/AES_BLOCK_SIZE+1)*AES_BLOCK_SIZE
input_string=(unsigned char *)calloc(len,sizeof(unsigned char))
if(input_string==NULL)
return -1
strncpy(input_string,content,strlen(content))
for(i=0i<16++i)
key[i]=i+12
for(i=0i<AES_BLOCK_SIZE++i)
iv[i]=i
if(way==0)
{
if(AES_set_encrypt_key(key,128,&aes)<0)
return -1
}
else
{
if(AES_set_decrypt_key(key,128,&aes)<0)
return -1
}
encrypt_string=(unsigned char *)calloc(len,sizeof(unsigned char))
if(encrypt_string==NULL)
return -1
if(way==0)
AES_cbc_encrypt(input_string,encrypt_string,len,&aes,iv,AES_ENCRYPT)
else
AES_cbc_encrypt(input_string,encrypt_string,len,&aes,iv,AES_DECRYPT)
strcpy(content,(char *)encrypt_string)
free(input_string)
free(encrypt_string)
return 0
}
恰好我有。能运行的，C语言的。#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 = 0rot <4rot++ ) {
// 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 DotProduct( 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 products of each matrix row and the column vector.
result[0] = DotProduct( row+0, column )
result[1] = DotProduct( row+3, column )
result[2] = DotProduct( row+2, column )
result[3] = DotProduct( 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
//以下为加解密密码，共16字节。可以选择任意值
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 )//完成一个块(16字节，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用来存贮密码表
KeyExpansion( expandedKey )
sBoxInv = block2// Must be block2. block2至此开始只用来存贮SBOXINV
CalcSBoxInv( sBox, sBoxInv )
}
//对一个16字节块解密,参数buffer是解密密缓存，chainBlock是要解密的块
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 )
}
//对一个16字节块完成加密，参数buffer是加密缓存，chainBlock是要加密的块
void aesEncrypt( unsigned char * buffer, unsigned char * chainBlock )
{
CopyBytes( buffer, chainBlock, BLOCKSIZE )
//XORBytes( buffer, chainBlock, BLOCKSIZE )
Cipher( buffer, expandedKey )
CopyBytes( chainBlock, buffer, BLOCKSIZE )
}
//加解密函数，参数为加解密标志，要加解密的数据缓存起始指针，要加解密的数据长度（如果解密运算，必须是16的整数倍。）
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//未加密数据的原始长度
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=0i<Blocksi++)
{
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字节的块补零处理
}
else
{
Blocks=DataLen/16
}
for(i=0i<Blocksi++)
{
cleardog()
aesEncrypt(tempbuf,ChiperDataBuf+4+16*i)
}
cleardog()
return(Blocks*16+4)
}
}
//#endif
以上是C文件。以下是头文件
#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
这是我根据网上程序改写的。只支持128位加解密。没有使用占内存很多的查表法。故运算速度会稍慢。
