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Check if a password has been pwned with the Pwned Passwords V2 API
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| require 'io/console' | |
| require 'open-uri' | |
| require 'digest' | |
| puts "The 5-character prefix of the password's SHA-1 hash will be sent." | |
| puts "For details, see https://www.troyhunt.com/ive-just-launched-pwned-passwords-version-2/" | |
| print 'Password (hidden): ' | |
| password = $stdin.noecho(&:gets).strip | |
| puts | |
| hash = Digest::SHA1.hexdigest(password).upcase | |
| prefix = hash[0...5] | |
| url = "https://api.pwnedpasswords.com/range/#{prefix}" | |
| print "Requesting #{url}. Continue (y/n)? " | |
| if $stdin.gets.strip.downcase[0] != 'y' | |
| puts 'Canceled.' | |
| exit | |
| end | |
| pwned = open(url) do |response| | |
| Hash[response.each_line.map { |line| | |
| suffix, count = line.strip.split(':') | |
| [(prefix + suffix).upcase, count.to_i] | |
| }] | |
| end | |
| count = pwned[hash] | |
| print "Password with SHA-1 hash #{hash} " | |
| if count | |
| puts "has been pwned. Seen #{count} time#{count == 1 ? '' : 's'}." | |
| else | |
| puts "has not been pwned." | |
| end |
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