(SQL Server) Get the Server Certificate, Certificate Chain, and Root CA Certificate

Demonstrates how to get the HTTP server certificate, its certificate chain, and the root CA certificate.

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

    -- We're getting the SSL/TLS certificate, so make sure to connect to the SSL/TLS port (443).
    DECLARE @sslCert int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @sslCert OUT

    EXEC sp_OAMethod @http, 'GetServerCert', @success OUT, 'apple.com', 443, @sslCert
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @sslCert
        RETURN
      END

    DECLARE @certChain int
    EXEC @hr = sp_OACreate 'Chilkat.CertChain', @certChain OUT

    EXEC sp_OAMethod @sslCert, 'BuildCertChain', @success OUT, @certChain
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @sslCert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @sslCert
        EXEC @hr = sp_OADestroy @certChain
        RETURN
      END

    DECLARE @cert int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT

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


        EXEC sp_OAGetProperty @cert, 'SubjectDN', @sTmp0 OUT
        PRINT 'SubjectDN ' + @i + ': ' + @sTmp0


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

    -- If the certificate chain reaches the root CA cert, then the last cert in the chain
    -- is the root CA cert.
    EXEC sp_OAGetProperty @certChain, 'ReachesRoot', @iTmp0 OUT
    IF @iTmp0 = 1
      BEGIN
        DECLARE @caCert int
        EXEC @hr = sp_OACreate 'Chilkat.Cert', @caCert OUT

        EXEC sp_OAMethod @certChain, 'CertAt', @success OUT, @numCerts - 1, @caCert

        EXEC sp_OAGetProperty @caCert, 'SubjectDN', @sTmp0 OUT
        PRINT 'CA Root Cert: ' + @sTmp0
      END

    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @sslCert
    EXEC @hr = sp_OADestroy @certChain
    EXEC @hr = sp_OADestroy @cert
    EXEC @hr = sp_OADestroy @caCert


END
GO