zt自己动手用工行U盾加密自己私有文件

原文url: http://www.bigsea.com.cn/archives/821/

zt自己动手用工行U盾加密自己私有文件

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安全技术
| by bigsea
| 4788 Views.
| 2008, November 26, 5:59 PM

本帖子原来是fleshwound的投稿文章，被root转入论坛。

作者:ecceccecc

URL:http://www.smatrix.org

网上的文件加密
软件多如牛毛，文件加密的核心是对对称密钥的保护。网上基于口令的文件加密很弱的，自己动手用工行u盾
可以做一个文件加密程序，绝对的安全。AES大家goole上一找就行了。对称密钥核心部分用下面的代码就可以了。

#include <windows.h>

#include <tchar.h>

#include <wincrypt.h>

#include <stdio.h>

int _tmain(int argc, _TCHAR* argv[])

{

HCRYPTPROV hProv;

HCRYPTKEY hKey;

BYTE *pbKeyBlob = NULL;

DWORD dwBlobLen;

BYTE *pbData = NULL;

DWORD cbData;

DWORD i;





//LPTSTR MSCSP=TEXT("Logoxin CSP v1.0");

//LPSTR MSACSP="Logoxin CSP v1.0";



LPTSTR MSCSP=TEXT("SafeSign CSP Version 1.0");

LPSTR MSACSP="SafeSign CSP Version 1.0";





BYTE pbBuffer[128];

BYTE *pbConst= (BYTE *)"The data that is to be Encrypted.";

DWORD dwBufferLen = (DWORD)strlen((char *)pbConst)+1;

memcpy(pbBuffer,pbConst,dwBufferLen);

if(!CryptAcquireContext(&hProv, NULL, MSCSP, PROV_RSA_FULL, 0))

printf("Error %x CryptAcquireContext!n", GetLastError());

if(!CryptGetProvParam(hProv, PP_ENUMCONTAINERS, pbData, &cbData, CRYPT_FIRST))

printf("Error %x CryptGetProvParam!n", GetLastError());

pbData = new BYTE[cbData];

//Get the Container Name

if(!CryptGetProvParam(hProv, PP_ENUMCONTAINERS, pbData, &cbData, CRYPT_FIRST))

printf("Error %x CryptGetProvParam!n", GetLastError());

//ReleaseContext

if(!CryptReleaseContext(hProv,0))

printf("Error %x during ReleaseContext!n", GetLastError());



//Get the Container

if(!CryptAcquireContextA(&hProv, (LPCSTR)pbData, MSACSP, PROV_RSA_FULL, 0))

printf("Error %x CryptAcquireContext!n", GetLastError());

if(!CryptGetUserKey(hProv,AT_KEYEXCHANGE,&hKey))

printf("Error %x CryptGetUserKey!n", GetLastError());



// Determine the size of the key BLOB and allocate memory.

if(!CryptExportKey(hKey, 0, PUBLICKEYBLOB , 0, NULL, &dwBlobLen))

printf("Error %x computing BLOB length!n", GetLastError());

if((pbKeyBlob = (BYTE *)malloc(dwBlobLen)) == NULL)

printf("Out of memory!n");



// Export the key into a simple key BLOB.

if(!CryptExportKey(hKey, 0, PUBLICKEYBLOB , 0, pbKeyBlob, &dwBlobLen))

printf("Error %x during CryptExportKey!n", GetLastError());

//Encrypt PlainText

if(!CryptEncrypt(hKey,NULL,TRUE,0,pbBuffer,&dwBufferLen,128))

printf("Error %x during CryptEncrypt!n", GetLastError());

printf("the Ciper isn");

for(i=0;i<dwBufferLen;i++)

printf("%02X",pbBuffer);

printf("n");



//Decrypt CipherText

if(!CryptDecrypt(hKey,NULL,TRUE,0,pbBuffer,&dwBufferLen))

printf("Error %x during CryptDecrypt!n", GetLastError());

printf("the Plain isn");

for(i=0;i<dwBufferLen;i++)

printf("%c",pbBuffer);

printf("n");



if(hKey)

{

if(!CryptDestroyKey(hKey))

printf("Error %x during CryptDestoryKey!n", GetLastError());

}





//ReleaseContext

if(!CryptReleaseContext(hProv,0))

printf("Error %x during ReleaseContext!n", GetLastError());





return 1;

}

(你可以随意转载，但请保留原作者信息，有任何关于密码学和USBKEY,网银的问题可以来交流！

by ecceccecc）