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最近研究了一下alchemy,网上找了Aes算法C语言实现,写了个简单的加密解密功能。
- //========================================================
- // AlchemyAes
- // a library for actionscript3 use the AES Encrypt function in alchemy C/C++ code
- //@filename alchemyLib.cpp
- //@date 2011.12.11
- //@auther noahwang
- //@email noahwang@usa.com
- //========================================================
- #include "AS3.h"
- #include "alchemyLib.h"
- AS3_Val doAes(void *data, AS3_Val args)
- {
- AS3_Val input = NULL;
- unsigned int in_len;
- char * ar;
- AS3_ArrayValue(args, "AS3ValType, IntType", &input, &in_len);
- ar = (char *)malloc(in_len);
-
- AS3_ByteArray_readBytes((void*)ar, input, in_len);
-
-
- char * aesData;
- int out_len = 0;
- char * keyStr = "hizaozao";
-
- //use AES to Encrypt the bytes
- aesData = DES_Encrypt(ar, keyStr, in_len, out_len );
- //make a new as3 byteArray var
- AS3_Val baNS = AS3_String("flash.utils");
- AS3_Val baClass = AS3_NSGetS(baNS, "ByteArray");
- AS3_Val emptyParams = AS3_Array("");
- AS3_Val byteArray2 = AS3_New(baClass, emptyParams);
-
- AS3_ByteArray_writeBytes(byteArray2, aesData, out_len);
- return byteArray2;
- }
- AS3_Val doUnAes(void *data, AS3_Val args)
- {
- AS3_Val input = NULL;
- unsigned int in_len;
- char * ar;
- AS3_ArrayValue(args, "AS3ValType, IntType", &input, &in_len);
- ar = (char *)malloc(in_len);
-
- AS3_ByteArray_readBytes((void*)ar, input, in_len);
-
-
- char * aesData;
- int out_len = 0;
- char * keyStr = "hizaozao";
-
- //use AES to Decrypt the bytes
- aesData = DES_Decrypt(ar, keyStr, in_len, out_len );
- //make a new as3 byteArray var
- AS3_Val baNS = AS3_String("flash.utils");
- AS3_Val baClass = AS3_NSGetS(baNS, "ByteArray");
- AS3_Val emptyParams = AS3_Array("");
- AS3_Val byteArray2 = AS3_New(baClass, emptyParams);
-
- AS3_ByteArray_writeBytes(byteArray2, aesData, out_len);
- return byteArray2;
- }
- int main(int argc, char *argv[])
- {
- // regular function
- AS3_Val doAesVal = AS3_Function(NULL, doAes);
-
- // async function
- AS3_Val doUnAesVal = AS3_Function(NULL, doUnAes);
-
- // construct an object that holds refereces to the 2 functions
- AS3_Val result = AS3_Object("doAes: AS3ValType, doUnAes: AS3ValType",
- doAesVal, doUnAesVal);
- AS3_Release(doAesVal);
- AS3_Release(doUnAesVal);
- // notify that we initialized -- THIS DOES NOT RETURN!
- AS3_LibInit(result);
- return 0;
- }
复制代码- //========================================================
- // AlchemyAes
- // a library for actionscript3 use the AES Encrypt function in alchemy C/C++ code
- //@filename alchemyLib.h
- //@date 2011.12.11
- //@auther noahwang
- //@email noahwang@usa.com
- //========================================================
- #include "aes.h"
复制代码- //========================================================
- // AlchemyAes
- // a library for actionscript3 use the AES Encrypt function in alchemy C/C++ code
- //@filename aes.c
- //@date 2011.12.11
- //@auther noahwang
- //@email noahwang@usa.com
- //========================================================
- #include "stdio.h"
- #include "string.h"
- #include "time.h"
- #include "stdlib.h"
- #ifndef __AES_H__
- #define __AES_H__
- typedef char ElemType;
- 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]);
- char * DES_Encrypt(char *plainFile, char *keyStr,int in_len, int & out_len);
- char * DES_Decrypt(char *cipherFile, char *keyStr,int in_len, int & out_len);
- #endif //__AES_H__
复制代码- //========================================================
- // AlchemyAes
- // a library for actionscript3 use the AES Encrypt function in alchemy C/C++ code
- //@filename aes.h
- //@date 2011.12.11
- //@auther noahwang
- //@email noahwang@usa.com
- //========================================================
- #include "aes.h"
- /*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};
- /*字节转换成二进制*/
- int ByteToBit(ElemType ch, ElemType bit[8]){
- int cnt;
- for(cnt = 0;cnt < 8; cnt++){
- *(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 = 0;cnt < 8; cnt++){
- *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 = 0; cnt < 8; cnt++){
- 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 = 0; cnt < 8; cnt++){
- 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 = 0; cnt < 16; cnt++){/*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 = 0; cnt < 56; cnt++){
- 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 = 0; cnt < 48; cnt++){
- 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 = 0; cnt < 64; cnt++){
- 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 = 0; cnt < 64; cnt++){
- 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 = 0; cnt < 48; cnt++){
- 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 = 0; cnt < 32; cnt++){
- 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 = 0; cnt < count; cnt++){
- 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 = 0; cnt < 8; cnt++){
- 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 = 0; cnt < 16; cnt++){
- 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 = 15; 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,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*/
- char * DES_Encrypt(char *plainFile, char *keyStr,int in_len, int & out_len){
-
- int iii = 0;
-
- char *cipherFile;
- int count = in_len % 8;
- int len = 0;
- int times = in_len / 8;
-
- cipherFile = (char*)malloc(times * 8 + (count !=0)?8:0);
-
- ElemType plainBlock[8],cipherBlock[8],keyBlock[8];
- ElemType bKey[64];
- ElemType subKeys[16][48];
-
- /*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(times--){
- /*每次读8个字节*/
- memcpy(plainBlock, (plainFile + len),8);
- DES_EncryptBlock(plainBlock,subKeys,cipherBlock);
- memcpy( (cipherFile + len), cipherBlock,8);
- len += 8;
-
- }
-
- if(count){
-
- memcpy(plainBlock, (plainFile + len),8);
- /*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);
- memcpy((cipherFile + len), cipherBlock,8);
- len += 8;
- }
-
- iii = 0;
-
- out_len = len;
-
- return cipherFile;
- }
-
- /*解密文件*/
- char * DES_Decrypt(char *cipherFile, char *keyStr,int in_len, int & out_len){
-
- int iii = 0;
- //printf("密文:\n");
- //for(;iii<in_len;iii++){
- //printf("%d", *(cipherFile + iii));
- // }
- // printf("\n");
-
- char *plainFile;
-
- int len = 0;
- int count = 0;
- int times = in_len / 8;
-
- plainFile = (char*)malloc(in_len);
-
- ElemType plainBlock[8],cipherBlock[8],keyBlock[8];
- ElemType bKey[64];
- ElemType subKeys[16][48];
-
- /*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);
-
- //printf("times: %d \n", times);
- while(times--){
- /*密文的字节数一定是8的整数倍*/
- //printf("times: %d \n", times);
- memcpy(cipherBlock, (cipherFile + len),8);
- DES_DecryptBlock(cipherBlock,subKeys,plainBlock);
- if(times > 0){
- memcpy((plainFile + len), plainBlock,8);
- len += 8;
- }else{
- break;
- }
- }
-
- /*判断末尾是否被填充*/
- if(plainBlock[7] < 8){
- for(count = 8 - plainBlock[7]; count < 7; count++){
- if(plainBlock[count] != '\0'){
- break;
- }
- }
- }
- printf("count: %d \n",plainBlock[7]);
- if(count == 7){/*有填充*/
-
- memcpy((plainFile + len), plainBlock,8 - plainBlock[7]);
- len += 8 - plainBlock[7];
- //fwrite(plainBlock,sizeof(char),8 - plainBlock[7],plain);
- }
- else{/*无填充*/
-
- memcpy((plainFile + len), plainBlock,8);
- len += 8;
- //fwrite(plainBlock,sizeof(char),8,plain);
- }
-
- //printf("len: %d \n",len);
- //iii = 0;
- //printf("原文:\n");
- // for(;iii<len;iii++){
- // printf("%d", *(plainFile +iii));
- // }
- // printf("\n");
-
- out_len = len;
-
- return plainFile;
- }
复制代码
AlchemyLibrary.as
- package
- {
- import cmodule.alchemyLib.CLibInit;
-
- import flash.display.Sprite;
- import flash.utils.ByteArray;
-
- /**
- * AlchemyLibrary
- * @date 2011.12.11
- * @author noah
- * @email noahwang@usa.com
- */
- public class AlchemyLibrary extends Sprite
- {
- public function AlchemyLibrary()
- {
- var alchemyLib:CLibInit = new CLibInit;
- var alchemyObj:Object = alchemyLib.init();
-
- var by:ByteArray = new ByteArray();
- by.writeUTFBytes("abcdefghijklmnopqrstuvwxyza");
- by.position = 0;
-
- trace("加密前长度: " + by.length);
-
- var by2:ByteArray = alchemyObj.doAes(by, by.length);
- if(by2){
- by2.position = 0;
- trace("加密后长度: " + by2.length);
-
- var by3:ByteArray = alchemyObj.doUnAes(by2, by2.length);
- if(by3){
- by3.position = 0;
-
- var len:uint = by3.length;
- trace("解密后长度: " + by3.length);
- var str:String = "";
- while(len--){
- str += by3.readUTFBytes(1);
- }
- trace(str);
- }
- }
- }
- }
- }
复制代码 以上全部代码,
可以在sourceforge上直接提取项目和代码,欢迎提出宝贵意见。
svn://svn.code.sf.net/u/noahwang/code/trunk/
http://sourceforge.net/u/noahwang/code/3/tree/trunk/
本文来自:http://bbs.9ria.com/thread-106692-1-1.html
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