private IntPtr OpenAlgorithmProvider(string alg, string provider, string chainingMode)
{
IntPtr hAlg = IntPtr.Zero;
uint status = BCrypt.BCryptOpenAlgorithmProvider(out hAlg, alg, provider, 0x0);
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("BCrypt.BCryptOpenAlgorithmProvider() failed with status code:{0}", status));
}
byte[] chainMode = Encoding.Unicode.GetBytes(chainingMode);
status = BCrypt.BCryptSetAlgorithmProperty(hAlg, BCrypt.BCRYPT_CHAINING_MODE, chainMode, chainMode.Length, 0x0);
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("BCrypt.BCryptSetAlgorithmProperty(BCrypt.BCRYPT_CHAINING_MODE, BCrypt.BCRYPT_CHAIN_MODE_GCM) failed with status code:{0}", status));
}
return(hAlg);
}
private byte[] GetProperty(IntPtr hAlg, string name)
{
int size = 0;
uint status = BCrypt.BCryptGetProperty(hAlg, name, null, 0, ref size, 0x0);
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("BCrypt.BCryptGetProperty() (get size) failed with status code:{0}", status));
}
byte[] value = new byte[size];
status = BCrypt.BCryptGetProperty(hAlg, name, value, value.Length, ref size, 0x0);
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("BCrypt.BCryptGetProperty() failed with status code:{0}", status));
}
return(value);
}