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#!/usr/bin/env ruby
require 'openssl'
def crypt_by_password(alg, pass, salt, text)
puts "--Setup--"
puts %(cipher alg: "#{alg}")
puts %(plain text: "#{text}")
puts %(password: "#{pass}")
puts %(salt: "#{salt}")
puts
puts "--Encrypting--"
enc = OpenSSL::Cipher::Cipher.new(alg)
enc.encrypt
enc.pkcs5_keyivgen(pass, salt)
cipher = enc.update(text)
cipher << enc.final
puts %(encrypted text: #{cipher.inspect})
puts
puts "--Decrypting--"
dec = OpenSSL::Cipher::Cipher.new(alg)
dec.decrypt
dec.pkcs5_keyivgen(pass, salt)
plain = dec.update(cipher)
plain << dec.final
puts %(decrypted text: "#{plain}")
puts
end
def ciphers
ciphers = OpenSSL::Cipher.ciphers.sort
ciphers.each{|i|
if i.upcase != i && ciphers.include?(i.upcase)
ciphers.delete(i)
end
}
return ciphers
end
puts "Supported ciphers in #{OpenSSL::OPENSSL_VERSION}:"
ciphers.each_with_index{|name, i|
printf("%-15s", name)
puts if (i + 1) % 5 == 0
}
puts
puts
alg = ARGV.shift || ciphers.first
pass = "secret password"
salt = "8 octets" # or nil
text = "abcdefghijklmnopqrstuvwxyz"
crypt_by_password(alg, pass, salt, text)
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