5.7.3 Support for ROT-13

The ROT-13 transformation is a simple form of encryption where the letters A-M are transposed with the letters L-Z. It is often used in Usenet postings/mailing lists to prevent people from accidentally reading a disturbing message.

GNU Anubis supports ROT-13 via a loadable Guile function. To enable this support, add the following to your GUILE section:

guile-load-program rot-13.scm

Then, in your RULE section use:

Scheme Function: rot-13 keyword-arguments

The command accepts the following keyword-arguments:

#:body

Encrypt the entire body of the message

#:subject

Encrypt the ‘Subject’ header.

For example:

trigger "rot-13.*body"
 guile-process rot-13 #:body
done
trigger "rot-13.*subj"
 guile-process rot-13 #:subject
done

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