BCryptCloseAlgorithmProvider function (bcrypt.h)

The BCryptCloseAlgorithmProvider function closes a CNG algorithm provider.

Note: Callers targeting Windows 10 and later should consider using CNG Algorithm Pseudo-handles instead of opening and closing CNG algorithm providers. See remarks of the CNG Algorithm Pseudo-handle documentation for restrictions.

Syntax

NTSTATUS BCryptCloseAlgorithmProvider(
  [in, out] BCRYPT_ALG_HANDLE hAlgorithm,
  [in]      ULONG             dwFlags
);

Parameters

[in, out] hAlgorithm

A handle that represents the algorithm provider to close. This handle is obtained by calling the BCryptOpenAlgorithmProvider function.

[in] dwFlags

A set of flags that modify the behavior of this function. No flags are defined for this function.

Return value

Returns a status code that indicates the success or failure of the function.

Possible return codes include, but are not limited to, the following.

Remarks

BCryptCloseAlgorithmProvider can be called either from user mode or kernel mode. Kernel mode callers must be executing at PASSIVE_LEVEL IRQL.

To call this function in kernel mode, use Cng.lib, which is part of the Driver Development Kit (DDK). Windows Server 2008 and Windows Vista: To call this function in kernel mode, use Ksecdd.lib.

Requirements

See also

BCryptOpenAlgorithmProvider

CNG Algorithm Pseudo-handles