message-signed-or-encrypted-p

message-signed-or-encrypted-p is a compiled Lisp function in `message.el'.

(message-signed-or-encrypted-p &optional DONT-EMULATE-MIME HANDLES)

Say whether the current buffer contains signed or encrypted message.
If DONT-EMULATE-MIME is nil, this function does the MIME emulation on
messages that don't conform to PGP/MIME described in RFC2015. HANDLES
is for the internal use.