opkg: add support for SHA256 verification

based on a patch by Evan Hunt <each@isc.org>
Signed-off-by: Steven Barth <steven@midlink.org>

SVN-Revision: 38302

scripts/ipkg-make-index.sh

@@ -18,11 +18,13 @@ for pkg in `find $pkg_dir -name '*.ipk' | sort`; do
 	echo "Generating index for package $pkg" >&2
 	file_size=$(ls -l $pkg | awk '{print $5}')
 	md5sum=$(md5sum $pkg | awk '{print $1}')
+	sha256sum=$(openssl sha256 $pkg | awk '{print $2}')
 	# Take pains to make variable value sed-safe
 	sed_safe_pkg=`echo $pkg | sed -e 's/^\.\///g' -e 's/\\//\\\\\\//g'`
 	tar -xzOf $pkg ./control.tar.gz | tar xzOf - ./control | sed -e "s/^Description:/Filename: $sed_safe_pkg\\
 Size: $file_size\\
 MD5Sum: $md5sum\\
+SHA256sum: $sha256sum\\
 Description:/"
 	echo ""
 done