#!/bin/sh

# Quit out if anything fails.

set -e

# Clean out patent-or-otherwise-encumbered code.

# MDC-2: 4,908,861 13/03/2007 - expired, we do not remove it but do not enable it anyway

# IDEA:  5,214,703 07/01/2012 - expired, we do not remove it anymore

# RC5:   5,724,428 01/11/2015 - expired, we do not remove it anymore

# EC:    ????????? ??/??/2020

# SRP:   ????????? ??/??/2017 - expired, we do not remove it anymore

# Remove assembler portions of IDEA, MDC2, and RC5.

# (find crypto/rc5/asm -type f | xargs -r rm -fv)

for c in `find crypto/bn -name "*gf2m.c"`; do

	echo Destroying $c

	> $c

done

for c in `find crypto/ec -name "ec2*.c" -o -name "ec_curve.c"`; do

	echo Destroying $c

	> $c

done

for c in `find test -name "ectest.c"`; do

	echo Destroying $c

	> $c

done

for h in `find crypto ssl apps test -name "*.h"` ; do

	echo Removing EC2M references from $h

	cat $h | \

	awk    'BEGIN {ech=1;} \

		/^#[ \t]*ifndef.*NO_EC2M/ {ech--; next;} \

                /^#[ \t]*if/ {if(ech < 1) ech--;} \

		{if(ech>0) {;print $0};} \

		/^#[ \t]*endif/ {if(ech < 1) ech++;}' > $h.hobbled && \

	mv $h.hobbled $h

done