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Creates a cryptographic provider within SQL Server from an Extensible Key Management (EKM) provider.

Topic link icon Transact-SQL Syntax Conventions

    FROM FILE = path_of_DLL


Is the name of the Extensible Key Management provider.


Is the path of the .dll file that implements the SQL Server Extensible Key Management interface.

All keys created by a provider will reference the provider by its GUID. The GUID is retained across all versions of the DLL.

The DLL that implements SQLEKM interface must be digitally signed using any certificate. SQL Server will verify the signature. This includes its certificate chain, which must have its root installed at the Trusted Root Cert Authorities location on a Windows system. If the signature is not verified correctly, the CREATE CRYPTOGRAPHIC PROVIDER statement will fail. For more information about certificates and certificate chains, see SQL Server Certificates and Asymmetric Keys.

When an EKM provider dll does not implement all of the necessary methods, CREATE CRYPTOGRAPHIC PROVIDER can return error 33085:

One or more methods cannot be found in cryptographic provider library '%.*ls'.

When the header file used to create the EKM provider dll is out of date, CREATE CRYPTOGRAPHIC PROVIDER can return error 33032:

SQL Crypto API version '%02d.%02d' implemented by provider is not supported. Supported version is '%02d.%02d'.

Requires CONTROL SERVER permission or membership in the sysadmin fixed server role.

The following example creates a cryptographic provider called SecurityProvider in SQL Server from a .dll file. The .dll file is named c:\SecurityProvider\SecurityProvider_v1.dll and it is installed on the server. The provider's certificate must first be installed on the server.

-- Install the provider
    FROM FILE = 'c:\SecurityProvider\SecurityProvider_v1.dll'

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