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|
#!/bin/sh
# This script copies the ChaCha20 implementation from the
# nettle upstream, with necessary adjustments for bundling in GnuTLS.
set +e
: ${srcdir=.}
SRC=$srcdir/devel/nettle
DST=$srcdir/lib/nettle/chacha
IMPORTS="
chacha-core-internal.c
chacha-crypt.c
chacha-internal.h
chacha-poly1305.c
chacha-poly1305.h
chacha-set-key.c
chacha-set-nonce.c
chacha.h
poly1305-internal.c
poly1305.h
"
PUBLIC="
aes.h
bignum.h
ecc-curve.h
ecc.h
macros.h
memxor.h
nettle-meta.h
nettle-types.h
"
test -d $DST || mkdir $DST
for f in $IMPORTS; do
src=$SRC/$f
dst=$DST/$f
if test -f $src; then
if test -f $dst; then
echo "Replacing $dst (existing file backed up in $dst~)"
mv $dst $dst~
else
echo "Copying file $dst"
fi
cp $src $dst
# Use <nettle/*.h> for public headers.
for h in $PUBLIC; do
p=$(echo $h | sed 's/\./\\./g')
if grep '^#include "'$p'"' $dst 2>&1 >/dev/null; then
sed 's!^#include "'$p'"!#include <nettle/'$h'>!' $dst > $dst-t && \
mv $dst-t $dst
fi
done
# Remove unused <assert.h>.
if grep '^#include <assert\.h>' $dst 2>&1 >/dev/null; then
if ! grep 'assert *(' $dst 2>&1 >/dev/null; then
sed '/^#include <assert\.h>/d' $dst > $dst-t && mv $dst-t $dst
fi
fi
case $dst in
*.h)
# Rename header guard so as not to conflict with the public ones.
if grep '^#ifndef NETTLE_.*_H\(_INCLUDED\)*' $dst 2>&1 >/dev/null; then
g=$(sed -n 's/^#ifndef NETTLE_\(.*_H\(_INCLUDED\)*\)/\1/p' $dst)
sed 's/\(NETTLE_'$g'\)/GNUTLS_LIB_NETTLE_CHACHA_\1/' $dst > $dst-t && \
mv $dst-t $dst
fi
;;
esac
case $dst in
*.h)
# Add prefix to function symbols avoid clashing with the public ones.
sed -e 's/^#define \(.*\) nettle_\1/#define \1 gnutls_nettle_chacha_\1/' \
-e 's/^#define _\(.*\) _nettle_\1/#define _\1 _gnutls_nettle_chacha_\1/' \
-e 's/^#define \(.*\) _nettle_\1/#define \1 _gnutls_nettle_chacha_\1/' \
$dst > $dst-t && \
mv $dst-t $dst
;;
esac
else
echo "Error: $src not found" 1>&2
exit 1
fi
done
|
