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(SQL Server) HTTP - Verify Server is a Trusted Root CA

Demonstrates how to only allow connections to an HTTP server having a certificate with a root that is in our list of trusted CA root certificates.

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
    DECLARE @sTmp0 nvarchar(4000)
    -- Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
    -- by calling UnlockBundle.  It requires a Bundle unlock code.
    DECLARE @chilkatGlob int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Global', @chilkatGlob OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @chilkatGlob, 'UnlockBundle', @success OUT, 'Anything for 30-day trial.'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @chilkatGlob, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @chilkatGlob
        RETURN
      END

    --  On my particular system, the root CA cert for this URL is not pre-installed.
    --  Note: This may be different for you.
    --  Also, this example was written on 29-May-2015.  This URL was valid at the time,
    --  but may not be valid at a future date.
    DECLARE @url nvarchar(4000)
    SELECT @url = 'https://animals.nationalgeographic.com/animals/invertebrates/starfish/'

    DECLARE @http int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Http', @http OUT

    --  Require that the SSL/TLS server certificate is not expired,
    --  and that the certificate signature is valid.
    --  This does not ensure that it has a chain of authentication to
    --  a trusted root.  To ensure that, the TrustedRoots object (below) is required.
    EXEC sp_OASetProperty @http, 'RequireSslCertVerify', 1

    --  Do the HTTPS page fetch (through the SSH tunnel)
    DECLARE @html nvarchar(4000)
    EXEC sp_OAMethod @http, 'QuickGetStr', @html OUT, @url
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @chilkatGlob
        EXEC @hr = sp_OADestroy @http
        RETURN
      END


    PRINT 'The HTTP GET was successful.'

    --  Now let's require that HTTP requests to SSL/TLS servers that don't have trusted CA roots
    --  should fail.
    DECLARE @trustedRoots int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.TrustedRoots', @trustedRoots OUT

    --  Indicate that we will trust any pre-installed certificates on this system.
    --  (The meaning of pre-installed certificates depends on the operating system, and in
    --  some environments there is no such thing as pre-installed certificates.  See the reference
    --  documentation for the TrustedRoots class.)
    EXEC sp_OASetProperty @trustedRoots, 'TrustSystemCaRoots', 1

    --  Activate the trusted roots globally for all Chilkat objects.
    --  This call really shouldn't fail, so we're not checking the return value.
    EXEC sp_OAMethod @trustedRoots, 'Activate', @success OUT

    --  Given that our previous HTTP GET likely kept the connection open,
    --  make sure that all HTTP connections are closed before re-trying.
    --  Otherwise, we'll simply be re-using the pre-existing connection.
    EXEC sp_OAMethod @http, 'CloseAllConnections', @success OUT

    --  Now let's try fetching the URL again.  It should fail this time because
    --  there is a requirement that the SSL/TLS server certificate must have a trusted root,
    --  and the trusted root for this URL is not installed on my system (but may be different for you..)
    EXEC sp_OAMethod @http, 'QuickGetStr', @html OUT, @url
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0

        PRINT 'Good, the HTTP request failed as expected.'
      END
    ELSE
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0

        PRINT 'Hmmm... we did not fail as expected?'
      END

    EXEC @hr = sp_OADestroy @chilkatGlob
    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @trustedRoots


END
GO

 

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