#!/bin/sh -e
#
# update-ca-certificates
#
# Copyright (c) 2003 Fumitoshi UKAI <ukai@debian.or.jp>
# Copyright (c) 2009 Philipp Kern <pkern@debian.org>
#
# 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 02111-1301,
# USA.
#

verbose=0
fresh=0
default=0
DESTDIR=
CERTSCONF=/etc/ca-certificates.conf
CERTSCONFD=/etc/ca-certificates.d
CERTSDIR=/usr/share/ca-certificates
LOCALCERTSDIR=/etc/certs
CERTBUNDLE=/etc/certs/ca-certificates.crt
ETCCERTSDIR=/etc/openssl/certs
HOOKSDIR=/etc/ca-certificates/update.d

while [ $# -gt 0 ];
do
  case $1 in
    --verbose|-v)
      verbose=1;;
    --fresh|-f)
      fresh=1;;
    --default|-d)
      default=1
      fresh=1;;
    --destdir)
      DESTDIR=$2; shift;;
    --certsconf)
      shift
      CERTSCONF="$1";;
    --certsdir)
      shift
      CERTSDIR="$1";;
    --localcertsdir)
      shift
      LOCALCERTSDIR="$1";;
    --certbundle)
      shift
      CERTBUNDLE="$1";;
    --etccertsdir)
      shift
      ETCCERTSDIR="$1";;
    --hooksdir)
      shift
      HOOKSDIR="$1";;
    --sysroot)
      shift
      SYSROOT="$1"
      CERTSCONF="$1/${CERTSCONF}"
      CERTSDIR="$1/${CERTSDIR}"
      LOCALCERTSDIR="$1/${LOCALCERTSDIR}"
      ETCCERTSDIR="$1/${ETCCERTSDIR}"
      HOOKSDIR="$1/${HOOKSDIR}";;
    --help|-h|*)
      echo "$0: [--verbose] [--fresh]"
      exit;;
  esac
  shift
done

CERTSCONF=${DESTDIR}${CERTSCONF}
CERTSCONFD=${DESTDIR}${CERTSCONFD}
CERTSDIR=${DESTDIR}${CERTSDIR}
LOCALCERTSDIR=${DESTDIR}${LOCALCERTSDIR}
CERTBUNDLE=${DESTDIR}${CERTBUNDLE}
ETCCERTSDIR=${DESTDIR}${ETCCERTSDIR}
HOOKSDIR=${DESTDIR}${HOOKSDIR}

if [ ! -s "$CERTSCONF" ]
then
  fresh=1
fi

cleanup() {
  rm -f "$TEMPBUNDLE"
  rm -f "$ADDED"
  rm -f "$REMOVED"
}
trap cleanup 0

# Helper files.  (Some of them are not simple arrays because we spawn
# subshells later on.)
TEMPBUNDLE="${CERTBUNDLE}.new"
ADDED="$(mktemp -p "${TMPDIR:-/tmp}" "ca-certificates.tmp.XXXXXX")"
REMOVED="$(mktemp -p "${TMPDIR:-/tmp}" "ca-certificates.tmp.XXXXXX")"

# Adds a certificate to the bundle being built.  The OpenSSL hashed
# CApath is regenerated afterwards from the finished bundle by p11-kit.
add() {
  CERT="$1"
  echo "+$CERT" >> "$ADDED"
  # Add trailing newline to certificate, if it is missing (#635570)
  sed -e '$a\' "$CERT" >> "$TEMPBUNDLE"
}

remove() {
  CERT="$1"
  echo "-$CERT" >> "$REMOVED"
}

echo "Updating certificates in $ETCCERTSDIR..."

# Add default certificate authorities if requested
if [ "$default" = 1 ]; then
  find -L "$CERTSDIR" -type f -name '*.crt' | sort | while read -r crt
  do
    add "$crt"
  done
fi

for conf in $CERTSCONF $CERTSCONFD/*.conf; do
  # skip inexistent files (matched by glob)
  [ -f $conf ] || continue

  # Handle certificates that should be removed.  This is an explicit act
  # by prefixing lines in the configuration files with exclamation marks (!).
  sed -n -e '/^$/d' -e 's/^!//p' $conf | while read -r crt
  do
    remove "$CERTSDIR/$crt"
  done

  sed -e '/^$/d' -e '/^#/d' -e '/^!/d' $conf | while read -r crt
  do
    if test -f "$CERTSDIR/$crt"
    then
      add "$CERTSDIR/$crt"
    elif test -f "$LOCALCERTSDIR/$crt"
    then
      add "$LOCALCERTSDIR/$crt"
    else
      echo "W: $CERTSDIR/$crt or $LOCALCERTSDIR/$crt not found, but listed in $conf." >&2
      continue
    fi
  done
done

ADDED_CNT=$(wc -l < "$ADDED")
REMOVED_CNT=$(wc -l < "$REMOVED")

# chmod and mv only if TEMPBUNDLE exists or install may fail, #996005
if [ -f "$TEMPBUNDLE" ]
then
  chmod 0644 "$TEMPBUNDLE"
  mv -f "$TEMPBUNDLE" "$CERTBUNDLE"
  # Restore proper SELinux label after moving the file
  [ -x /sbin/restorecon ] && /sbin/restorecon "$CERTBUNDLE" >/dev/null 2>&1
fi

# Regenerate the OpenSSL hashed CApath from the freshly built bundle.
# p11-kit computes the hashes itself, so ca-certificates stays off the
# openssl -> ca-certificates dependency cycle.  Skipped under --destdir
# because trust reads the live system trust module, not the buildroot.
if [ -z "$DESTDIR" ]
then
  # drop stale symlinks (incl. the legacy openssl-rehash layout) first;
  # trust extract leaves foreign symlinks in place otherwise
  find "$ETCCERTSDIR" -maxdepth 1 -type l -delete 2>/dev/null || :
  trust extract --format=openssl-directory --filter=ca-anchors --overwrite "$ETCCERTSDIR"
fi

echo "$ADDED_CNT added, $REMOVED_CNT removed; done."

# vim:set et sw=2:
