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#!/bin/sh
#
# update-ca-certificates script for embedded systems.
#
# Copyright (C) 2009  Phil Sutter <phil@nwl.cc>
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

CRTCONF=/etc/ca-certificates.conf
CRTDIR=/usr/share/ca-certificates
LNKDIR=/etc/ssl/certs
OPENSSL="openssl"

cert_type() { # (certfile)
	grep -qE '^-----BEGIN (X509 |TRUSTED |)CERTIFICATE-----' $1 && {
		echo "cert"
		return 0
	}
	grep -qE '^-----BEGIN X509 CRL-----' $1 && {
		echo "crl"
		return 0
	}
	echo "unknown"
	return 1
}

${OPENSSL} version >/dev/null 2>&1 || {
	echo "Fatal: no openssl executable found, bailing out"
	exit 1
}

for l in $(ls ${DESTDIR}${LNKDIR}/* 2>/dev/null); do
	[ -L "$l" ] && rm -f "$l"
done

cat ${DESTDIR}$CRTCONF | while read crt; do
	[ -n "$crt" ] || continue
	[[ "$crt" = -* ]] && continue

	cname="$(basename $crt)"

	ln -s ${CRTDIR}/$crt ${DESTDIR}${LNKDIR}/$cname

	ctype="$(cert_type ${DESTDIR}${CRTDIR}/$crt)"
	case $ctype in
		cert)
			sslcmd="x509"
			pfx=""
		;;
		crl)
			sslcmd="crl"
			pfx="r"
		;;
		*)
			echo "Warning: ignoring unknown filetype ${DESTDIR}${CRTDIR}/$crt"
			continue
		;;
	esac

	hsh="$(${OPENSSL} $sslcmd -hash -noout -in ${DESTDIR}${CRTDIR}/$crt)"
	idx=0
	while [ -e ${DESTDIR}${LNKDIR}/${hsh}.${pfx}${idx} ]; do
		let "idx++"
	done
	ln -s ${CRTDIR}/$crt ${DESTDIR}${LNKDIR}/${hsh}.${pfx}${idx}
done

if [ -z ${DESTDIR} ]; then
  cat /etc/ssl/certs/*.0 > /etc/ssl/cert.pem
fi

exit 0