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(SQL Server) IMAP SSH Tunneling (Port Forwarding)

Demonstrates how to setup and use an SSH tunnel for IMAP.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @imap int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Imap', @imap OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int

    --  Anything unlocks the component and begins a fully-functional 30-day trial.
    EXEC sp_OAMethod @imap, 'UnlockComponent', @success OUT, 'Anything for 30-day trial'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  The SSH hostname may be a hostname or an
    --  IP address, such as "192.168.1.108".
    --  The port is typically 22 (the standard port for SSH).
    DECLARE @sshHostname nvarchar(4000)
    SELECT @sshHostname = 'www.mysshserver.com'
    DECLARE @sshPort int
    SELECT @sshPort = 22

    --  Connect to an SSH server and establish the SSH tunnel:
    EXEC sp_OAMethod @imap, 'SshOpenTunnel', @success OUT, @sshHostname, @sshPort
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  Authenticate with the SSH server via a login/password
    --  or with a public key.
    --  This example demonstrates SSH password authentication.
    --  Note: This is not authenticating with the IMAP server, it is
    --  for authenticating with the SSH server, which is separate.
    EXEC sp_OAMethod @imap, 'SshAuthenticatePw', @success OUT, 'mySshLogin', 'mySshPassword'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  OK, the SSH tunnel is setup.  The IMAP component may
    --  be used exactly the same as usual, except all communications
    --  are sent through the SSH tunnel.

    --  Connect to an IMAP server via the SSH tunnel.
    --  Because the SSH tunnel has been previously setup,
    --  this does not establish a direct connection with the IMAP
    --  server.  It directs the SSH server to establish the connection.

    --  In this example, the IMAP server requires SSL/TLS.  The TLS connection
    --  will be enclosed within the SSH tunnel.
    EXEC sp_OASetProperty @imap, 'Ssl', 1
    EXEC sp_OASetProperty @imap, 'Port', 993
    EXEC sp_OAMethod @imap, 'Connect', @success OUT, 'imap.my-imap-server.com'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  Authenticate with the IMAP server via the SSH tunnel.
    EXEC sp_OAMethod @imap, 'Login', @success OUT, 'myLogin', 'myPassword'
    IF @success <> 1
      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 <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  How many messages in Inbox?
    DECLARE @msgCount int
    EXEC sp_OAGetProperty @imap, 'NumMessages', @msgCount OUT
    IF @msgCount = 0
      BEGIN

        PRINT 'No messages found.'
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    DECLARE @upperBound int
    SELECT @upperBound = 10
    IF @msgCount < @upperBound
      BEGIN
        SELECT @upperBound = @msgCount
      END

    --  Download up to the 1st 10 messages.
    DECLARE @i int

    DECLARE @bUid int
    SELECT @bUid = 0
    SELECT @i = 1
    WHILE @i <= @upperBound
      BEGIN

        DECLARE @email int
        EXEC sp_OAMethod @imap, 'FetchSingle', @email OUT, @i, @bUid
        IF @email Is NULL 
          BEGIN
            EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @imap
            RETURN

          END
        ELSE
          BEGIN
            EXEC sp_OAGetProperty @email, 'From', @sTmp0 OUT
            PRINT @sTmp0
            EXEC sp_OAGetProperty @email, 'Subject', @sTmp0 OUT
            PRINT @sTmp0

            PRINT '----'

            EXEC @hr = sp_OADestroy @email

          END
        SELECT @i = @i + 1
      END

    --  Disconnect from the IMAP server.
    --  The SSH tunnel remains open.
    EXEC sp_OAMethod @imap, 'Disconnect', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  It is possible to re-use the existing SSH tunnel for the next connection:
    EXEC sp_OAMethod @imap, 'Connect', @success OUT, 'imap.my-imap-server2.com'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  Review the LastErrorText to see that the connection was made via the SSH tunnel:
    EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
    PRINT @sTmp0

    EXEC sp_OAMethod @imap, 'Disconnect', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END

    --  Finally, close the SSH tunnel.
    EXEC sp_OAMethod @imap, 'SshCloseTunnel', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @imap, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imap
        RETURN
      END


    PRINT 'IMAP SSH tunneling example completed.'

    EXEC @hr = sp_OADestroy @imap


END
GO

 

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