(SQL Server) POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted 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
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    -- The mailman object is used for receiving (POP3) 
    -- and sending (SMTP) email.
    DECLARE @mailman int
    -- Use "Chilkat_9_5_0.MailMan" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.MailMan', @mailman OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- 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'

    -- If running on Microsoft Windows, the Chilkat mailman
    -- will automatically search the registry-based certificate stores
    -- for matching certificates and private keys required for
    -- decryption.  However, on Linux, MAX OS X, and other
    -- operating systems, no such thing exists.  Therefore, you'll 
    -- need to specify one or more PFX (.p12 / .pfx) files as
    -- sources for locating the certs required for decyrption.
    DECLARE @success int
    EXEC sp_OAMethod @mailman, 'AddPfxSourceFile', @success OUT, '/pfxFiles/certs_and_keys_1.pfx', 'pfxPassword1'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mailman
        RETURN
      END
    EXEC sp_OAMethod @mailman, 'AddPfxSourceFile', @success OUT, '/pfxFiles/certs_and_keys_2.pfx', 'pfxPassword2'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mailman
        RETURN
      END
    -- ...
    -- Note: On MS Windows, it is not required to provide PFX sources
    -- if the needed certs and private keys are already installed
    -- on the system (in the registry-based certificate stores).

    -- Copy the all email from the user's POP3 mailbox 
    -- into a bundle object.  The email remains on the server.
    DECLARE @bundle int
    EXEC sp_OAMethod @mailman, 'CopyMail', @bundle 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

    -- S/MIME security envelopes are automatically "unwrapped" 
    -- when a message is retrieved from the server. Signed emails are automatically verified, and 
    -- encrypted emails are automatically decrypted, restoring the email to the original state before 
    -- signing and/or encrypting. Information about the signing and encrypting certificates can be 
    -- retrieved from the Email object (methods: GetSignedByCert, GetEncryptedByCert; 
    -- properties: SignedBy, EncryptedBy, SignaturesValid, Decrypted, ReceivedSigned, 
    -- ReceivedEncrypted).

    -- Loop over the bundle, 
    DECLARE @i int
    SELECT @i = 0
    EXEC sp_OAGetProperty @bundle, 'MessageCount', @iTmp0 OUT
    WHILE @i < @iTmp0
      BEGIN
        DECLARE @email int

        EXEC sp_OAMethod @bundle, 'GetEmail', @email OUT, @i

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

        -- At this point, if the email was signed and/or encrypted, it is already "unwrapped", i.e.
        -- the email is already decrypted and in a state as if it were never signed or encrypted.
        -- You may check to see if the email was received encrypted or signed, and if so,
        -- whether it was successfully unwrapped and who signed or encrypted it:
        EXEC sp_OAGetProperty @email, 'ReceivedEncrypted', @iTmp0 OUT
        IF @iTmp0 = 1
          BEGIN


            PRINT 'This email was encrypted when received.'
            EXEC sp_OAGetProperty @email, 'Decrypted', @iTmp0 OUT
            IF @iTmp0 = 1
              BEGIN

                PRINT 'This email was successfully decrypted.  It was encrypted by:'
                EXEC sp_OAGetProperty @email, 'EncryptedBy', @sTmp0 OUT
                PRINT @sTmp0
              END
            ELSE
              BEGIN

                PRINT 'This email was not decrypted.'
              END
          END
        EXEC sp_OAGetProperty @email, 'ReceivedSigned', @iTmp0 OUT
        IF @iTmp0 = 1
          BEGIN


            PRINT 'This email was signed when received.'
            EXEC sp_OAGetProperty @email, 'SignaturesValid', @iTmp0 OUT
            IF @iTmp0 = 1
              BEGIN

                PRINT 'The signature was verified.  It was signed by:'
                EXEC sp_OAGetProperty @email, 'SignedBy', @sTmp0 OUT
                PRINT @sTmp0
              END
            ELSE
              BEGIN

                PRINT 'The signature verification failed.'
              END
          END

        -- The email's body, HTML body, attachments, etc.
        -- are decrypted and available just like any non-encrypted email.


        PRINT '--'
        EXEC @hr = sp_OADestroy @email

        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @bundle


    EXEC @hr = sp_OADestroy @mailman


END
GO