BCryptCloseAlgorithmProvider function (bcrypt.h)

The BCryptCloseAlgorithmProvider function closes an algorithm provider.


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


[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.

Return code Description
The function was successful.
The algorithm handle in the hAlgorithm parameter is not valid.


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). For more information, see WDK and Developer Tools.Windows Server 2008 and Windows Vista:  To call this function in kernel mode, use Ksecdd.lib.


Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header bcrypt.h
Library Bcrypt.lib
DLL Bcrypt.dll

See also