Depending on the state of the CFB, the Comm. Bridge may be required to extract data from the security offset. If the CFB being processed has been encrypted, the Comm. Bridge must decrypt the CFB in order to obtain the security data.
The DECRYPT Comm. Bridge user exit is intended to provide a user-written decryption routine that must be able to correctly decrypt the CFB previously encrypted by the client runtime's encryption user exit.
The Comm. Bridge passes the encrypted portion of the CFB to the DECRYPT exit routine. The exit returns a decrypted version of the data it was passed as input.
On return from the DECRYPT user exit, the Comm. Bridge parses out the user ID and password. The Comm. Bridge uses this retrieved security data when servicing the associated cooperative flow request.
The Comm. Bridge decrypts the CFB for it is internal use only. When the CFB is forwarded on to the target server environment, it remains in the encrypted state as received from the originating DPC.
The DECRYPT user exit is discussed in more detail in the User Exit Reference Guide. Also, see the chapter Distributed Processing - Overview Guide for a detailed discussion on encryption and security within a DP application.
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