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Update fido2-utils.sh #1

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e4269d3
Update fido2-utils.sh
rclabs-dev Sep 26, 2024
1b66fc2
Update fido2-utils.sh
rclabs-dev Oct 15, 2024
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41 changes: 36 additions & 5 deletions fido2-utils.sh
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Original file line number Diff line number Diff line change
@@ -1,6 +1,15 @@
#!/bin/sh
DISK="/dev/nvme0n1p3"

array_getNth() {
shift "$(( $1 + 1 ))";
printf '%s\n' "$1";
}

array_length() {
echo "$#";
}

fido2_device() {
device=$(fido2-token -L | sed 's/:.*//')
if [ -z "$device" ] ; then
Expand All @@ -10,18 +19,22 @@ fido2_device() {
fi
}

fido2_get_token_users() {
token_id=$(cryptsetup luksDump "$1" | grep -E '^\s+[0-9]+: systemd-fido2$' | sed -e 's/\s\+\([0-9]\+\):.*/\1/')
echo "$token_id"
}

fido2_get_token() {
token_id=$(cryptsetup luksDump "$1" | grep -E '^\s+[0-9]+: systemd-fido2$' | head -1 | sed -e 's/\s\+\([0-9]\+\):.*/\1/')
cryptsetup token export "$1" --token-id=$token_id
cryptsetup token export "$1" --token-id=$2
}

fido2_is_pin_required() {
pin_required=$(fido2_get_token "$1" | jq -r '."fido2-clientPin-required"')
test "$pin_required" = "true"
}

fido2_authenticate() {
token_json=$(fido2_get_token "$2")
fido2_pin_check() {
token_json=$(fido2_get_token "$2" "$3")
param_file=$(mktemp)
use_pin=$(echo $token_json | jq -r '."fido2-clientPin-required"')
if [ "$use_pin" = "true" ] ; then
Expand All @@ -43,7 +56,25 @@ fido2_authenticate() {
assert_flags="$assert_flags -t uv=$(echo $token_json | jq -r '."fido2-uv-required"')"
fi

assertion=$(echo -n "$pin" | setsid fido2-assert $assert_flags -i "$param_file" $(fido2_device) 2> /dev/null || (rm -f $param_file ; echo "Wrong PIN." 1>&2 ; exit 1))
assertion=$(echo -n "$pin" | setsid fido2-assert $assert_flags -i "$param_file" $(fido2_device) 2> /dev/null || (rm -f $param_file ; printf '%s' "Wrong"))
rm -f $param_file
printf '%s' "$assertion" | tail -1
}

fido2_authenticate() {
positionFidoUsers=$(fido2_get_token_users "$2")
totalUsers=$(($(array_length $positionFidoUsers)-1))
authOk=""
for i in $(seq 0 $totalUsers)
do
result=$(fido2_pin_check $1 $2 "$(array_getNth $i $positionFidoUsers)")
if [ $totalUsers -ge 0 ] && [ "$result" != "Wrong" ]; then
authOk=$result
fi
done
if [ -z $authOk ]; then
printf '%s' "Wrong PIN."
else
printf '%s' "$authOk"
fi
}