private SHA1CryptoServiceProvider(CspParameters parameters)
{
_paramCSP = parameters;
_hHash = IntPtr.Zero;
if (SharedStatics.Crypto_SHA1CryptoServiceProviderContext == _zeroPointer)
{
IntPtr hCSP = IntPtr.Zero;
int hr = _AcquireCSP(_paramCSP, ref hCSP);
if (hCSP == IntPtr.Zero)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_CSP_CouldNotAcquire"));
}
SharedStatics.Crypto_SHA1CryptoServiceProviderContext = hCSP;
// next bit is in case we do two acquires...
if (SharedStatics.Crypto_SHA1CryptoServiceProviderContext != hCSP)
{
_FreeCSP(hCSP);
}
}
_hHash = _CreateHash(SharedStatics.Crypto_SHA1CryptoServiceProviderContext, CALG_SHA1);
if (_hHash == IntPtr.Zero)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_CSP_CreateHash"));
}
_HashHandleProtector = new __HashHandleProtector(_hHash);
}
/************************* PUBLIC METHODS ************************/
/// <include file='doc\SHA1CryptoServiceProvider.uex' path='docs/doc[@for="SHA1CryptoServiceProvider.Initialize"]/*' />
public override void Initialize()
{
if (_HashHandleProtector != null && !_HashHandleProtector.IsClosed)
{
_HashHandleProtector.Close();
}
_hHash = _CreateHash(SharedStatics.Crypto_SHA1CryptoServiceProviderContext, CALG_SHA1);
if (_hHash == IntPtr.Zero)
{
throw new CryptographicException(Environment.GetResourceString("Cryptography_CSP_CreateHash"));
}
_HashHandleProtector = new __HashHandleProtector(_hHash);
}