checkcerts.sh: add some support for non-Linux systems

Date computations as performed in this script require the use of GNU date,
which is only available by default on Linux systems. With this check-in we
explicitly check for the existence of GNU date before continuing with the date
calculations.

Previous versions of this script relied on 'certtool' to print the expiration
dates but certtool isn't available by default on non-Linux systems either. The
previous check-in added support for using OpenSSL, retaining the old behavior
on non-Linux systems.

(Also a re-arrangement of the date warning logic)
This commit is contained in:
kytv
2013-03-30 14:24:59 +00:00
parent 427abb081c
commit bfc327833c

View File

@ -4,6 +4,9 @@
# Returns nonzero on failure. Fails if cert cannot be read or is older than
# $SOON (default 30).
#
# Hard dependency: OpenSSL OR gnutls
# Recommended: GNU date
#
# zzz 2011-08
# kytv 2013-03
# public domain
@ -22,17 +25,58 @@ elif [ $(which certtool) ]; then : ;else
exit 1
fi
CHECKCERT() {
# This "grouping hack" is here to prevent errors from being displayed with the
# original Bourne shell (Linux shells don't need the {}s
if { date --help;} >/dev/null 2>&1 ; then
HAVE_GNUDATE=1
fi
checkcert() {
if [ $OPENSSL ]; then
DATA=$(openssl x509 -enddate -noout -in $1| cut -d'=' -f2-)
else
DATA=$(certtool -i < "$1" | sed -e '/Not\sAfter/!d' -e 's/^.*:\s\(.*\)/\1/')
fi
# While this isn't strictly needed it'll ensure that the output is consistent,
# regardles of the tool used.
date -u -d "$(echo $DATA)" '+%F %H:%M'
# regardles of the tool used. Dates/times are formatting according to OpenSSL's output
# since this available by default on most systems.
if [ -n "$HAVE_GNUDATE" ]; then
LANG=C date -u -d "$(echo $DATA)" '+%b %d %H:%M:%S %Y GMT'
else
echo $DATA
fi
}
compute_dates() {
# Date computations currently depend on GNU date(1).
# If run on a non-Linux system just print the expiration date.
# TODO Cross-platform date calculation support
if [ -n "$HAVE_GNUDATE" ]; then
SECS=$(date -u -d "$EXPIRES" '+%s')
DAYS="$(expr \( $SECS - $NOW \) / 86400)"
if [ $DAYS -ge $SOON ]; then
echo "Expires in $DAYS days ($EXPIRES)"
elif [ $DAYS -eq 1 ]; then
DAYS=$(echo $DAYS | sed 's/^-//')
echo "****** Check for $I failed, expires tomorrow ($EXPIRES) ******"
FAIL=1
elif [ $DAYS -eq 0 ]; then
echo "****** Check for $i failed, expires today ($EXPIRES) ******"
FAIL=1
elif [ $DAYS -le $SOON ] && [ $DAYS -gt 0 ]; then
echo "****** Check for $i failed, expires in $DAYS days (<= ${SOON}d) ($EXPIRES) ******"
FAIL=1
elif [ $DAYS -lt $WARN ] && [ $DAYS -gt $SOON ]; then
echo "****** WARNING: $i expires in $DAYS days (<= ${WANT}d) ($EXPIRES) ******"
elif [ $DAYS -lt 0 ]; then
DAYS=$(echo $DAYS | sed 's/^-//')
echo "****** Check for $i failed, expired $DAYS days ago ($EXPIRES) ******"
FAIL=1
fi
else
echo $EXPIRES
fi
}
cd `dirname $0`/../../installer/resources/certificates
@ -41,32 +85,12 @@ NOW=$(date -u '+%s')
for i in *.crt
do
echo "Checking $i ..."
EXPIRES=`CHECKCERT $i`
EXPIRES=`checkcert $i`
if [ -z "$EXPIRES" ]; then
echo "********* FAILED CHECK FOR $i *************"
FAIL=1
else
SECS=$(date -u -d "$EXPIRES" '+%s')
DAYS="$(expr \( $SECS - $NOW \) / 86400)"
if [ $DAYS -ge $SOON ]; then
echo "Expires in $DAYS days ($EXPIRES)"
elif [ $DAYS -le $SOON ] && [ $DAYS -gt 0 ]; then
echo "****** Check for $i failed, expires in $DAYS days (<= ${SOON}d) ($EXPIRES) ******"
FAIL=1
elif [ $DAYS -le $WARN ] && [ $DAYS -ge $SOON ]; then
echo "****** WARNING: $i expires in $DAYS days (<= ${WANT}d) ($EXPIRES) ******"
elif [ $DAYS -eq 1 ]; then
DAYS=$(echo $DAYS | sed 's/^-//')
echo "****** Check for $I failed, expires in $DAYS day ($EXPIRES) ******"
FAIL=1
elif [ $DAYS -eq 0 ]; then
echo "****** Check for $i failed, expires today ($EXPIRES) ******"
FAIL=1
elif [ $DAYS -le 0 ]; then
DAYS=$(echo $DAYS | sed 's/^-//')
echo "****** Check for $i failed, expired $DAYS days ago ($EXPIRES) ******"
FAIL=1
fi
compute_dates
fi
done