#!/bin/bash
file="$1"

### signatures ###
public=(
	"16b0e942929d6592d4a01b66b334427ba4db03b388a876432958d9010bd8d8b5"
	"b0197042824a752c2dba717a4b2ded88852111bbe12e6b5f57fdfa3abb9312c0"
	"ba2e6ff4de41ade9959702195d4c26c764e7aab85c627363681c29dbc4a8a2c5"
	"a4da8601d27c73a22094a98b02501367c451f364aaabfcf5c597784bf272429c"
	"fb9d6beba63dcb6175d0248c1e743b5fe4359474eb264d27f389d7a962e24477"
	"f70f9ddeb307fff8fca31a76f4fbd0ac676dab8ad143625f0a4160d434d72876"
	"9841dde0b9f6485d5fcdc858fb15c1db1c3bc77fb81aef3f0d4b835f76a3d73b"
	"39ef16b1853e54249dae2d06948329a93e3e13f354aaab792552aacd1d0b45ba"
	"5126eda4161bca3fcae134fa0e1824e55dffb986cc4e7fe37842857a118e2820"
)

name=(
	"HeJ"
	"thardes2"
	"oscar-"
	"THiSCO"
	"northalpha"
	"Barbarossa"
	"kb-light"
	"phimeas"
	"leeps"
)

### programm comes here ###
function progress {
        echo -en "\033[1;34m➔  "
        echo -en $*
        echo -en "\033[0m\n"
}

function info {
        echo -en "\033[1;36m"
        echo -en $*
        echo -en "\033[0m\n"
}

function success {
        echo -en "\033[1;32m  ✔ "
        echo -en $*
        echo -en "\033[0m\n"
}

function fail {
        echo -en "\033[1;31m  ✘ "
        echo -en $*
        echo -en "\033[0m\n"
}

if [ $# != 1 ]; then
	fail "Usage: `basename ${0}` manifest_file" >&2
	exit 1
fi

if [ ! -r "${file}" ]; then
	fail "Manifest \"${file}\" does not exist or is not readable!" >&2
	exit 1
fi

manifest="$(mktemp)"
n=0
m=0
count=$((${#public[@]}))

sed -e '/\-\-\-/,$d' $file > $manifest
signatures=$( sed -e '1,/\-\-\-/d' ${file} )

progress "checking signatures of ${file}"

for sign in ${signatures[@]}; do
	n=$(($n+1))
	right=0
	for i in `seq 0 $(($count-1))`; do
		if type "ecdsautil" > /dev/null 2>&1; then
			ecdsautil verify -s $sign -p ${public[i]} ${manifest}
		elif type "ecdsaverify" > /dev/null 2>&1; then
			ecdsaverify -s $sign -p ${public[i]} ${manifest}
		else
			fail "ecdsautil not found"
			exit 1
		fi
		if [ $? -eq 0 ]; then
			m=$(($m+1))
			right=1
			success "valid signature of ${name[i]}"
		fi
	done
	if [ $right == 0 ]; then
		 fail "can't verify signature No $n"
	fi
done

rm -f -- "${manifest}"
progress "finsh"
info "$n signatures checked, $m signatures valid."