private static extern bool CryptCreateHash(IntPtr hProv, ALG_ID algid, IntPtr hKey, uint dwFlags, ref IntPtr phHash);
private static bool SignVerifyFile(HCRYPTPROV hProv, HCRYPTKEY hPubKey, CertKeySpec dwKeySpec, ALG_ID HashAlgId, string szFileToSign, string szSigFile, bool fSign)
{
const uint BUFFER_SIZE = 4096;
uint dwSignature;
bool fResult;
bool fReturn = false;
try
{
// Open Data file
using var hDataFile = CreateFile(szFileToSign, Kernel32.FileAccess.GENERIC_READ, 0, default, FileMode.Open, FileFlagsAndAttributes.FILE_ATTRIBUTE_NORMAL);
if (hDataFile.IsInvalid)
{
MyPrintf(("CreateFile failed with %d\n"), GetLastError());
throw new Exception();
}
// Open/Create signature file
using var hSigFile = CreateFile(szSigFile, Kernel32.FileAccess.GENERIC_READ | Kernel32.FileAccess.GENERIC_WRITE, 0, default, FileMode.Open, FileFlagsAndAttributes.FILE_ATTRIBUTE_NORMAL);
if (hSigFile.IsInvalid)
{
MyPrintf(("CreateFile failed with %d\n"), GetLastError());
throw new Exception();
}
SafeHCRYPTHASH hHash;
// Create Hash
fResult = CryptCreateHash(hProv, HashAlgId, default, 0, out hHash);
public static extern bool CryptCreateHash(IntPtr hProv, ALG_ID Algid, IntPtr hKey, uint dwFlags, out IntPtr phHash);
public static extern bool CryptDeriveKey(IntPtr hProv, ALG_ID Algid, IntPtr hBaseData, uint dwFlags, ref IntPtr phKey);
public static extern bool CryptGenKey(
[In] IntPtr hProv,
[In] ALG_ID Algid,
[In] uint dwFlags,
[Out] out IntPtr phKey
);
