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(SQL Server) POP3 Verify Signed (S/MIME) Email

Demonstrates how to download and verify digitally signed S/MIME email.

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)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @mailman int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.MailMan', @mailman OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int

    -- Set the POP3 server's hostname
    EXEC sp_OASetProperty @mailman, 'MailHost', 'pop.someMailServer.com'

    -- Set the POP3 login/password.
    EXEC sp_OASetProperty @mailman, 'PopUsername', 'myLogin'
    EXEC sp_OASetProperty @mailman, 'PopPassword', 'myPassword'

    DECLARE @sa int
    EXEC sp_OAMethod @mailman, 'GetUidls', @sa OUT
    EXEC sp_OAGetProperty @mailman, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mailman
        RETURN
      END

    DECLARE @email int

    DECLARE @uidl nvarchar(4000)

    DECLARE @i int
    SELECT @i = 0
    EXEC sp_OAGetProperty @sa, 'Count', @iTmp0 OUT
    WHILE @i < @iTmp0
      BEGIN

        EXEC sp_OAMethod @sa, 'GetString', @uidl OUT, @i

        EXEC sp_OAMethod @mailman, 'FetchEmail', @email OUT, @uidl
        EXEC sp_OAGetProperty @mailman, 'LastMethodSuccess', @iTmp0 OUT
        IF @iTmp0 = 0
          BEGIN
            EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @sa

            EXEC @hr = sp_OADestroy @mailman
            RETURN
          END

        EXEC sp_OAGetProperty @email, 'From', @sTmp0 OUT
        PRINT @sTmp0
        EXEC sp_OAGetProperty @email, 'Subject', @sTmp0 OUT
        PRINT @sTmp0

        -- 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

                -- The certificate used for signing may be obtained
                -- by calling email.GetSignedByCert.
                DECLARE @cert int

                EXEC sp_OAMethod @email, 'GetSignedByCert', @cert OUT
                EXEC sp_OAGetProperty @email, 'LastMethodSuccess', @iTmp0 OUT
                IF @iTmp0 = 0
                  BEGIN

                    PRINT 'Failed to get signing certificate object.'
                  END
                ELSE
                  BEGIN

                    EXEC sp_OAGetProperty @cert, 'SubjectCN', @sTmp0 OUT
                    PRINT 'Signing cert: ' + @sTmp0
                    EXEC @hr = sp_OADestroy @cert

                  END

              END
            ELSE
              BEGIN

                PRINT 'Digital signature verification failed.'
              END

          END
        EXEC @hr = sp_OADestroy @email

        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @sa

    EXEC sp_OAMethod @mailman, 'Pop3EndSession', @success OUT

    EXEC @hr = sp_OADestroy @mailman


END
GO

 

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