#!/bin/sh

# This is a fake ykchalresp program that provides canned responses, for testing.

device=
slot=
blocking=1
hmac=
in=

while getopts 12HNn:i: arg
do
    case "$arg" in
        n)
            device="$OPTARG"
            ;;
        1)
            slot=1
            ;;
        2)
            slot=2
            ;;
        H)
            hmac=1
            ;;
        N)
            blocking=0
            ;;
        i)
            in="$OPTARG"
            ;;
    esac
done

if [ -z "$hmac" ]
then
    echo 'HMAC-SHA1 not requested' >&2
    exit 3
fi

if [ "$in" != '-' ]
then
    echo "Unexpected input file: $in" >&2
    exit 3
fi

read challenge

succeed() {
    echo "${YKCHALRESP_RESPONSE:-f000000000000000000000000000000000000000}"
    exit 0
}

case "$YKCHALRESP_MOCK" in
    block)
        if [ "$blocking" -eq 0 ]
        then
            echo "Yubikey core error: operation would block" >&2
            exit 1
        fi
        sleep 2
        succeed
        ;;
    error)
        echo "Yubikey core error: ${YKCHALRESP_ERROR:-not yet implemented}" >&2
        exit 1
        ;;
    usberror)
        echo "USB error: something happened" >&2
        exit 1
        ;;
    *)  # OK
        succeed
        ;;
esac
exit 2