INITUSER.C

/******************************************************************************\ 
*       This is a part of the Microsoft Source Code Samples.  
*       Copyright 1996 - 1998 Microsoft Corporation. 
*       All rights reserved.  
*       This source code is only intended as a supplement to  
*       Microsoft Development Tools and/or WinHelp documentation. 
*       See these sources for detailed information regarding the  
*       Microsoft samples programs. 
\******************************************************************************/ 
 
#include <windows.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <wincrypt.h> 
 
/*****************************************************************************/ 
void _cdecl main(void) 
{ 
    HCRYPTPROV hProv; 
    HCRYPTKEY hKey; 
    CHAR szUserName[100]; 
    DWORD dwUserNameLen = 100; 
 
    // Attempt to acquire a handle to the default key container. 
    if(!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, 0)) { 
// Some sort of error occured. 
 
// Create default key container. 
if(!CryptAcquireContext(&hProv, NULL, MS_DEF_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET)) { 
    printf("Error creating key container!\n"); 
    exit(1); 
} 
 
// Get name of default key container. 
if(!CryptGetProvParam(hProv, PP_CONTAINER, szUserName, &dwUserNameLen, 0)) { 
    // Error getting key container name. 
    szUserName[0] = 0; 
} 
 
printf("Create key container '%s'\n",szUserName); 
    } 
 
    // Attempt to get handle to signature key. 
    if(!CryptGetUserKey(hProv, AT_SIGNATURE, &hKey)) { 
if(GetLastError() == NTE_NO_KEY) { 
    // Create signature key pair. 
    printf("Create signature key pair\n"); 
 
    if(!CryptGenKey(hProv,AT_SIGNATURE,0,&hKey)) { 
printf("Error %x during CryptGenKey!\n", GetLastError()); 
exit(1); 
    } else { 
CryptDestroyKey(hKey); 
    } 
} else { 
    printf("Error %x during CryptGetUserKey!\n", GetLastError()); 
    exit(1); 
} 
    } 
 
    // Attempt to get handle to exchange key. 
    if(!CryptGetUserKey(hProv,AT_KEYEXCHANGE,&hKey)) { 
if(GetLastError()==NTE_NO_KEY) { 
    // Create key exchange key pair. 
    printf("Create key exchange key pair\n"); 
 
    if(!CryptGenKey(hProv,AT_KEYEXCHANGE,0,&hKey)) { 
printf("Error %x during CryptGenKey!\n", GetLastError()); 
exit(1); 
    } else { 
CryptDestroyKey(hKey); 
    } 
} else { 
    printf("Error %x during CryptGetUserKey!\n", GetLastError()); 
    exit(1); 
} 
    } 
 
    CryptReleaseContext(hProv,0); 
 
    printf("OK\n"); 
 
    exit(0); 
}