#!/bin/sh

if [  $# -lt 2 ]; then
    echo "Usage: $0 public-key file [sig file]"
    exit
fi

cert=$1
file=$2
sig=$2.sig

if [  $# -eq 3 ]; then
    sig=$3
fi

openssl base64 -d < $sig > $file.bsig
openssl dgst -sha256 -verify $cert -signature $file.bsig $file
rm -f $file.bsig