// Yuri Zarechny for News2News (c) 2007 
 
#include "stdafx.h"
#include "windows.h"
#include "conio.h"
#include "wincrypt.h"
 
char Buf [256];
DWORD BufSize;
 
LPSTR CreateHash(LPSTR tohash, ALG_ID alg)
{
    HCRYPTPROV hProv;
    HCRYPTHASH hash;
 
    if (CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL,
        CRYPT_VERIFYCONTEXT))
    {   
        if (CryptCreateHash(hProv, alg, 0, 0, &hash))
        {
            if (CryptHashData(hash, (BYTE *)&tohash, sizeof(tohash), 0))
            {
                ZeroMemory(&Buf, sizeof(Buf));
                BufSize = sizeof(Buf);
 
                if (!CryptGetHashParam(hash, HP_HASHVAL,
                    (BYTE *) &Buf, &BufSize, 0))
                    printf("Call to CryptGetHashParam failed. Error: %d\n",
                    GetLastError());
 
            } else printf("Call to CryptHashData failed. Error: %d\n",
                GetLastError());
 
            if (!CryptDestroyHash(hash))
                printf("Call to CryptDestroyHash failed. Error: %d\n",
                GetLastError());
 
        } else printf("Call to CryptCreateHash failed. Error: %d\n", 
            GetLastError());
 
        if (!CryptReleaseContext(hProv, 0))
            printf("Call to CryptReleaseContext failed. Error: %d\n", 
            GetLastError());
 
    } else printf("Call to CryptAcquireContext failed. Error: %d\n", 
        GetLastError());
 
    return Buf;
}
 
int _tmain()
{
    printf("SHA hash: %s\n", CreateHash("Visual C++", CALG_SHA));
    printf("MD5 hash: %s\n", CreateHash("Visual C++", CALG_MD5));
 
    printf("\nPress any key to exit.");
    getch();
    return 0;
}