Check your passwords against https://haveibeenpwned.com/Passwords

check_passwords.cr

# Check your passwords against https://haveibeenpwned.com/Passwords
# Usage:
# crystal run --release check_passwords.cr -- pwned-passwords*.txt
# Enter your passwords one per line, then press Return twice

require "digest/sha1"

my_passwords = Hash(String, String).new
until (line = gets || "").empty?
  my_passwords[Digest::SHA1.hexdigest(line).upcase] = line
end

ARGV.each do |filename|
  puts "----#{filename}----"
  File.each_line(filename) do |line|
    if my_passwords.has_key? line
      puts my_passwords[line]
    end
  end
end