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#include <iostream>
#include <fstream>
#include <windows.h>
#include <Wincrypt.h>
using namespace std;
int main()
{
srand( time ( NULL ) - 3 );
HCRYPTPROV hCryptProv = NULL;
BYTE pbData[16];
LPCSTR UserName = "MyKeyContainer";
cout << "lpcstr = " << UserName << endl;
cout << hCryptProv << endl << endl;
for (int i = 0; i < 17; ++i)
{
cout << pbData[i] << " ";
}cout << endl << endl << endl;
if( CryptAcquireContext( &hCryptProv, // handle to the CSP
UserName, // container name
NULL, // use the default provider
PROV_RSA_FULL, // provider type
0)) // flag values
{
printf("A cryptographic context with the %s key container \n", UserName);
printf("has been acquired.\n\n");
}
else
{
//-------------------------------------------------------------------
// An error occurred in acquiring the context. This could mean
// that the key container requested does not exist. In this case,
// the function can be called again to attempt to create a new key
// container. Error codes are defined in Winerror.h.
if (GetLastError() == NTE_BAD_KEYSET)
{
if(CryptAcquireContext(
&hCryptProv,
UserName,
NULL,
PROV_RSA_FULL,
CRYPT_NEWKEYSET))
{
printf("A new key container has been created.\n");
}
else
{
printf("Could not create a new key container.\n");
exit(1);
}
}
else
{
printf("A cryptographic service handle could not be "
"acquired.\n");
exit(1);
}
} // End of else.
//-------------------------------------------------------------------
// A cryptographic context and a key container are available. Perform
// any functions that require a cryptographic provider handle.
//-------------------------------------------------------------------
// When the handle is no longer needed, it must be released.
/*if (CryptReleaseContext(hCryptProv,0))
{
printf("The handle has been released.\n");
}
else
{
printf("The handle could not be released.\n");
}*/
cout << "username = " << UserName << " " << endl;
cout << "pbdata is now " << pbData << " " << endl;
if (CryptGenRandom ( hCryptProv, 8, pbData ) )
{
printf("Random sequence generated. \n");
}
else
{
printf("Error during CryptGenRandom.\n");
cout << "now " << hCryptProv << " " << endl;
exit(1);
}
cout << "pbdata is now " << pbData << " " << endl;
cout << "pbdata is now " << pbData << " " << endl;
cout << "hCryptProv is " << hCryptProv << " " << endl;
HCRYPTKEY hKey;
ALG_ID ENCRYPT_ALGORITHM = PROV_RSA_FULL;
DWORD KEYLENGTH = 3;
if(CryptGenKey(
hCryptProv,
ENCRYPT_ALGORITHM,
KEYLENGTH | CRYPT_EXPORTABLE,
&hKey))
{
printf("A session key has been created.\n");
}
else
{
printf("Error during CryptGenKey.\n");
exit(1);
}
//-------------------------------------------------------------------
// The key created can be exported into a key BLOB that can be
// written to a file.
// ...
// When you have finished using the key, free the resource.
cout << "hKey = " << hKey << " " << endl << endl << endl;
if (!CryptDestroyKey(hKey))
{
printf("Error during CryptDestroyKey.\n");
exit(1);
}
cout << "hkey = " << hKey << " " << endl << endl;
return 0;
}
|
Sep 16, 2009 at 9:23pm