关于des加密的问题。

渴死的鱼都被人用了啊 2013-08-26 05:41:23

之前找了N多的代码都是跟c#加密出来的不一样。刚才找到一个只有加密。没有解密。！晕死。

#include "stdafx.h"
#define _WIN32_WINNT 0x0400
#include <stdio.h>
#include <windows.h>
#include <wincrypt.h>
#include <string>
using namespace std;

#pragma comment( lib, "Advapi32.lib" )

//
// for DES
//

typedef struct
{
BLOBHEADER header;
DWORD cbKeySize;
BYTE rgbKeyData[8];
}KeyBlob;

LPSTR ConvertGBKToUtf8( LPSTR strGBK )
{
int len = MultiByteToWideChar(CP_ACP, 0, (LPSTR)strGBK, -1, NULL,0);
unsigned short * wszUtf8 = new unsigned short[len+1];
memset( wszUtf8, 0, len * 2 + 2 );
MultiByteToWideChar( CP_ACP, 0, (LPSTR)strGBK, -1, (LPWSTR)wszUtf8, len );

len = WideCharToMultiByte( CP_UTF8, 0, (LPCWSTR)wszUtf8, -1, NULL, 0, NULL, NULL );
char *szUtf8=new char[len + 1];
memset( szUtf8, 0, len + 1 );
WideCharToMultiByte ( CP_UTF8, 0, (LPCWSTR)wszUtf8, -1, szUtf8, len, NULL,NULL );

return szUtf8;
}

void Base64Encode(BYTE *src, int src_len, BYTE *dst)
{

int i = 0, j = 0;

char base64_map[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

for (; i < src_len - src_len % 3; i += 3) {

dst[j++] = base64_map[(src[i] >> 2) & 0x3F];

dst[j++] = base64_map[((src[i] << 4) & 0x30) + ((src[i + 1] >> 4) & 0xF)];

dst[j++] = base64_map[((src[i + 1] << 2) & 0x3C) + ((src[i + 2] >> 6) & 0x3)];

dst[j++] = base64_map[src[i + 2] & 0x3F];

}

if (src_len % 3 == 1) {

dst[j++] = base64_map[(src[i] >> 2) & 0x3F];

dst[j++] = base64_map[(src[i] << 4) & 0x30];

dst[j++] = '=';

dst[j++] = '=';

}else if (src_len % 3 == 2) {

dst[j++] = base64_map[(src[i] >> 2) & 0x3F];

dst[j++] = base64_map[((src[i] << 4) & 0x30) + ((src[i + 1] >> 4) & 0xF)];

dst[j++] = base64_map[(src[i + 1] << 2) & 0x3C];

dst[j++] = '=';

}

dst[j] = '\0';

}

DWORD DesEncrypt(char* szEncrypt, char* szKey, BYTE* szOut, DWORD nOutLen, char* sz_kiv)
{
char* sz_utf8_buff = ConvertGBKToUtf8( szEncrypt );

DWORD dwEncrypt = strlen(sz_utf8_buff);

if( szOut == NULL || \
nOutLen < dwEncrypt + 8 - (dwEncrypt % 8) || \
strlen( szKey ) < 8)
return 0;
memcpy(szOut, sz_utf8_buff, dwEncrypt);

//
// init
//

HCRYPTPROV hProv = NULL;
HCRYPTKEY hSessionKey = NULL;
BOOL bResult = TRUE;

KeyBlob blob;
blob.header.bType = PLAINTEXTKEYBLOB;
blob.header.bVersion = CUR_BLOB_VERSION;
blob.header.reserved = 0;
blob.header.aiKeyAlg = CALG_DES;
blob.cbKeySize = 8;
memcpy(blob.rgbKeyData, szKey, 8);

BYTE IV[9] = {0};

memcpy( IV, sz_kiv, 8 );

//
// start
//

CryptAcquireContext(&hProv,NULL, MS_DEF_PROV, PROV_RSA_FULL,0);
CryptImportKey(hProv, (BYTE*)&blob, sizeof(blob), 0, 0, &hSessionKey);
CryptSetKeyParam(hSessionKey, KP_IV, (BYTE*)IV, 0);

//
// Do
//
////解密
//CryptDecrypt(hSessionKey,NULL,TRUE,0,(BYTE*)szOut,&dwEncrypt);
////加密
CryptEncrypt(hSessionKey, NULL, TRUE, 0, (BYTE*)szOut, &dwEncrypt, nOutLen);
//
// Clean
//

CryptDestroyKey(hSessionKey);
CryptReleaseContext(hProv, 0);
delete sz_utf8_buff;

return dwEncrypt;
}

char* Encrypt( char* sz_encrypt, char* sz_key, char* sz_kiv )
{
BYTE szOut[1024] = {0};

//
// do Des crypt
//

DWORD dwRet = DesEncrypt( sz_encrypt, sz_key, szOut, 1024,sz_kiv );

//
// do base64
//

int nLen = strlen( (char*)szOut );
int nLenOut = nLen * 4 / 3;
BYTE* szBase64 = new BYTE[nLenOut+1];

memset( szBase64, 0, nLenOut + 1 );

Base64Encode( szOut, nLen, szBase64 );

return (char*)szBase64;
}

//int main(int argc, char* argv[])
//{
//
// char* szResoult = Encrypt( "asd", "VavicApp","VavicApp" );
// printf( "%s\n", szResoult);
//
// return 0;
//}

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