(SQL Server) Iterate Keys and Certs in PEM

Demonstrates how to access each of the private keys and certs contained within a 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
    DECLARE @iTmp0 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 @pem int
    EXEC @hr = sp_OACreate 'Chilkat.Pem', @pem OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Load the PEM from a file.
    -- If the PEM is encrypted, provide a password.  Otherwise pass an empty string for the password.
    DECLARE @password nvarchar(4000)
    SELECT @password = 'myPassword'
    EXEC sp_OAMethod @pem, 'LoadPemFile', @success OUT, '../myPemFiles/myPem.pem', @password
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pem, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pem
        RETURN
      END

    -- Note: If the app already has the PEM pre-loaded in a string variable, then load it 
    -- by calling LoadPem instead.  
    DECLARE @pemContent nvarchar(4000)
    SELECT @pemContent = '... the PEM contents ...'
    EXEC sp_OAMethod @pem, 'LoadPem', @success OUT, @pemContent, @password
    -- Check for success as before..

    -- Iterate over the private keys.
    DECLARE @numPrivateKeys int
    EXEC sp_OAGetProperty @pem, 'NumPrivateKeys', @numPrivateKeys OUT
    DECLARE @i int
    SELECT @i = 0

    DECLARE @privKey int
    EXEC @hr = sp_OACreate 'Chilkat.PrivateKey', @privKey OUT

    WHILE @i < @numPrivateKeys
      BEGIN
        EXEC sp_OAMethod @pem, 'PrivateKeyAt', @success OUT, @i, @privKey


        EXEC sp_OAGetProperty @privKey, 'BitLength', @iTmp0 OUT

        PRINT 'Private Key ' + @i + ' is ' + @iTmp0 + ' in length'
        SELECT @i = @i + 1
      END

    -- Iterate over the certificates.
    DECLARE @cert int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT

    DECLARE @numCerts int
    EXEC sp_OAGetProperty @pem, 'NumCerts', @numCerts OUT
    SELECT @i = 0
    WHILE @i < @numCerts
      BEGIN
        EXEC sp_OAMethod @pem, 'CertAt', @success OUT, @i, @cert


        EXEC sp_OAGetProperty @cert, 'SubjectDN', @sTmp0 OUT
        PRINT 'Certificate ' + @i + ' : ' + @sTmp0
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @pem
    EXEC @hr = sp_OADestroy @privKey
    EXEC @hr = sp_OADestroy @cert


END
GO