(SQL Server) Convert Java KeyStore to PEM

Loads a Java keystore file and saves the trusted certificate entries to a PEM file.

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

    DECLARE @jks int
    -- Use "Chilkat_9_5_0.JavaKeyStore" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JavaKeyStore', @jks OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @jksPassword nvarchar(4000)
    SELECT @jksPassword = 'myJksPassword'

    -- Load the Java keystore from a file.  The JKS file password is used
    -- to verify the keyed digest that is found at the very end of the keystore.
    -- It verifies that the keystore has not been modified.
    DECLARE @success int
    EXEC sp_OAMethod @jks, 'LoadFile', @success OUT, @jksPassword, '/someDir/keyStore.jks'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @jks, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jks
        RETURN
      END

    -- Open/create the output PEM file. 
    -- This example uses Chilkat's file access class for writing the output file.
    -- You may replace the file I/O lines of code with whatever is most convenient for you.
    DECLARE @fac int
    -- Use "Chilkat_9_5_0.FileAccess" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.FileAccess', @fac OUT

    EXEC sp_OAMethod @fac, 'OpenForWrite', @success OUT, '/pemFiles/caCerts.pem'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @fac, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @jks
        EXEC @hr = sp_OADestroy @fac
        RETURN
      END

    DECLARE @numCerts int
    EXEC sp_OAGetProperty @jks, 'NumTrustedCerts', @numCerts OUT
    DECLARE @i int

    DECLARE @cert int

    DECLARE @pem nvarchar(4000)

    -- Iterate over the trusted certs, get the PEM for each,
    -- and append it to the output file.
    SELECT @i = 0
    WHILE @i < @numCerts
      BEGIN
        EXEC sp_OAMethod @jks, 'GetTrustedCert', @cert OUT, @i

        -- Get the certificate in PEM format.  
        EXEC sp_OAMethod @cert, 'ExportCertPem', @pem OUT

        -- Append the PEM string to the open file.
        -- The PEM contains only us-ascii chars..
        EXEC sp_OAMethod @fac, 'AppendAnsi', @success OUT, @pem
        IF @success <> 1
          BEGIN
            EXEC sp_OAGetProperty @fac, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @cert

            EXEC @hr = sp_OADestroy @jks
            EXEC @hr = sp_OADestroy @fac
            RETURN
          END

        EXEC @hr = sp_OADestroy @cert

        SELECT @i = @i + 1
      END

    -- Close the output file.
    EXEC sp_OAMethod @fac, 'FileClose', NULL


    PRINT 'Trusted certificates saved to PEM.'

    EXEC @hr = sp_OADestroy @jks
    EXEC @hr = sp_OADestroy @fac


END
GO