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(SQL Server) IMAP Download and Verify Signed (S/MIME) EmailDemonstrates how to download and verify digitally signed S/MIME email. Note: This example requires Chilkat v11.0.0 or greater.
-- 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 requires the Chilkat API to have been previously unlocked. -- See Global Unlock Sample for sample code. DECLARE @imap int EXEC @hr = sp_OACreate 'Chilkat.Imap', @imap OUT IF @hr <> 0 BEGIN PRINT 'Failed to create ActiveX component' RETURN END -- Connect to an IMAP server. -- Use TLS EXEC sp_OASetProperty @imap, 'Ssl', 1 EXEC sp_OASetProperty @imap, 'Port', 993 EXEC sp_OAMethod @imap, 'Connect', @success OUT, 'imap.example.com' IF @success = 0 BEGIN EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @imap RETURN END EXEC sp_OAMethod @imap, 'Login', @success OUT, 'myLogin', 'myPassword' IF @success = 0 BEGIN EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @imap RETURN END -- Select an IMAP mailbox EXEC sp_OAMethod @imap, 'SelectMailbox', @success OUT, 'Inbox' IF @success = 0 BEGIN EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @imap RETURN END -- We can choose to fetch UIDs or sequence numbers. DECLARE @fetchUids int SELECT @fetchUids = 1 -- Get the message IDs of all the emails in the mailbox DECLARE @messageSet int EXEC @hr = sp_OACreate 'Chilkat.MessageSet', @messageSet OUT EXEC sp_OAMethod @imap, 'QueryMbx', @success OUT, 'ALL', @fetchUids, @messageSet IF @success = 0 BEGIN EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @imap EXEC @hr = sp_OADestroy @messageSet RETURN END DECLARE @email int EXEC @hr = sp_OACreate 'Chilkat.Email', @email OUT DECLARE @cert int EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT DECLARE @i int SELECT @i = 0 EXEC sp_OAGetProperty @messageSet, 'Count', @iTmp0 OUT WHILE @i < @iTmp0 BEGIN DECLARE @uid nvarchar(4000) EXEC sp_OAMethod @messageSet, 'GetId', @uid OUT, @i PRINT 'uid: ' + @uid EXEC sp_OAMethod @imap, 'FetchEmail', @success OUT, 0, @uid, 1, @email IF @success = 0 BEGIN EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT PRINT @sTmp0 EXEC @hr = sp_OADestroy @imap EXEC @hr = sp_OADestroy @messageSet EXEC @hr = sp_OADestroy @email EXEC @hr = sp_OADestroy @cert RETURN END -- The security layers of signed and/or encrypted emails -- are automatically "unwrapped" when loaded into -- a Chilkat email object. -- An application only needs to check to see if an email -- was received signed or encrypted, and then examine -- the success/failure. For example: EXEC sp_OAGetProperty @email, 'ReceivedSigned', @iTmp0 OUT IF @iTmp0 = 1 BEGIN PRINT 'This email was signed.' -- Check to see if the signatures were verified. EXEC sp_OAGetProperty @email, 'SignaturesValid', @iTmp0 OUT IF @iTmp0 = 1 BEGIN PRINT 'Digital signature(s) verified.' EXEC sp_OAGetProperty @email, 'SignedBy', @sTmp0 OUT PRINT 'Signer: ' + @sTmp0 -- Get the certificate used for signing. EXEC sp_OAMethod @email, 'LastSignerCert', @success OUT, 0, @cert IF @success = 0 BEGIN PRINT 'Failed to get signing certificate object.' END ELSE BEGIN EXEC sp_OAGetProperty @cert, 'SubjectCN', @sTmp0 OUT PRINT 'Signing cert: ' + @sTmp0 END END ELSE BEGIN PRINT 'Digital signature verification failed.' END END SELECT @i = @i + 1 END -- Disconnect from the IMAP server. EXEC sp_OAMethod @imap, 'Disconnect', @success OUT EXEC @hr = sp_OADestroy @imap EXEC @hr = sp_OADestroy @messageSet EXEC @hr = sp_OADestroy @email EXEC @hr = sp_OADestroy @cert END GO |
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