fdm-sanitize

#!/usr/bin/awk -f
#
# $Id$
#
# Copyright (c) 2006 Nicholas Marriott <nicholas.marriott@gmail.com>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
# OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
#
# If the output of fdm -vvvv is piped to this script, it will remove usernames
# and passwords from IMAP/POP3 output, for example:
#
# fdm -vvvv f 2>&1|fdm-sanitize|tee saved-output
#

BEGIN {
	imap_user = 0;
	imap_pass = 0;
}

/> [0-9]+ LOGIN \{[0-9]+\}/ {
	imap_user = 1;
	print ($1 " " $2 " " $3 " {*}");
	fflush();
	next;
}

/> .+ ?\{[0-9]+\}/ {
	if (imap_user) {
		print ("> * {*}");
		fflush();
		imap_user = 0;
		imap_pass = 1;
		next;
	}
	print ($0);
	fflush();
	next;
}

/> APOP .+/ {
	print ("> APOP * *");
	fflush();
	next;
}

/> USER .+/ {
	print ("> USER *");
	fflush();
	next;
}

/> PASS .+/ {
	print ("> PASS *");
	fflush();
	next;
}

/> .+/ {
	if (imap_pass) {
		print ("> *");
		fflush();
		imap_pass = 0;
		next;
	}
	print ($0);
	fflush();
	next;
}

/.*/ {
	print ($0);
	fflush();
}