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Add check of IP address

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compare_server_name_to_cert() now checks the DNS names and IP addresses in the subjectAltName extension for a match.
This commit is contained in:
David Cooper 2016-06-13 11:09:15 -04:00 committed by GitHub
parent 0a1c4d565c
commit b264714fd9
1 changed files with 12 additions and 4 deletions
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testssl.sh
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@ -3161,7 +3161,7 @@ compare_server_name_to_cert()
{
local servername=$1
local cert=$2
local cn sans san basename
local cn dns_sans ip_sans san basename
cn="$(get_cn_from_cert $cert)"
if [[ -n "$cn" ]]; then
@ -3173,9 +3173,10 @@ compare_server_name_to_cert()
fi
fi
sans=$($OPENSSL x509 -in $cert -noout -text 2>>$ERRFILE | grep -A3 "Subject Alternative Name" | grep "DNS:" | \
sed -e 's/DNS://g' -e 's/ //g' -e 's/,/ /g' -e 's/othername:<unsupported>//g')
for san in $sans; do
# Check whether any of the DNS names in the certificate match the servername
dns_sans=$($OPENSSL x509 -in $cert -noout -text 2>>$ERRFILE | grep -A3 "Subject Alternative Name" | \
sed -e 's/,/\n/g' | grep "DNS:" | sed -e 's/DNS://g' -e 's/ //g')
for san in $dns_sans; do
[[ "$san" == "$servername" ]] && return 0
# If $san is a wildcard name, then do a wildcard match
if echo -n "$san" | grep -q '^*.'; then
@ -3183,6 +3184,13 @@ compare_server_name_to_cert()
[[ "$san" == "*.$basename" ]] && [[ "$servername" == *".$basename" ]] && return 0
fi
done
# Check whether any of the IP addresses in the certificate match the serername
ip_sans=$($OPENSSL x509 -in $cert -noout -text 2>>$ERRFILE | grep -A3 "Subject Alternative Name" | \
sed -e 's/,/\n/g' | grep "IP Address:" | sed -e 's/IP Address://g' -e 's/ //g')
for san in $ip_sans; do
[[ "$san" == "$servername" ]] && return 0
done
return 1
}