(SQL Server) Generate RSA Key and Export to Encrypted PEM

SQL Server sample showing how to generate an RSA key and export to encrypted PEM.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @rsa int
    EXEC @hr = sp_OACreate 'Chilkat.Rsa', @rsa OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Generate a 1024-bit key.  Chilkat RSA supports
    -- key sizes ranging from 512 bits to 4096 bits.
    DECLARE @privKey int
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @privKey OUT

    EXEC sp_OAMethod @rsa, 'GenKey', @success OUT, 1024, @privKey
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @rsa, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @rsa
        EXEC @hr = sp_OADestroy @privKey
        RETURN
      END

    DECLARE @strEncPem nvarchar(4000)

    EXEC sp_OAMethod @privKey, 'GetPkcs8EncryptedPem', @strEncPem OUT, 'myPassword'

    -- You now have the private key in an encrypted format,
    -- which may be (for example) saved to a database.


    PRINT @strEncPem

    EXEC @hr = sp_OADestroy @rsa
    EXEC @hr = sp_OADestroy @privKey


END
GO