Class: PasswordManager

Inherits:
Object
  • Object
show all
Defined in:
lib/kafo/password_manager.rb

Instance Method Summary collapse

Instance Method Details

#aes_decrypt(text, passphrase) ⇒ Object 



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# File 'lib/kafo/password_manager.rb', line 35

def aes_decrypt(text, passphrase)
  cipher = OpenSSL::Cipher::Cipher.new("aes-256-cbc")
  cipher.decrypt
  cipher.key = Digest::SHA2.hexdigest(passphrase)
  cipher.iv = Digest::SHA2.hexdigest(passphrase + passphrase)

  decrypted = cipher.update(Base64.decode64(text))
  decrypted << cipher.final
  decrypted
end

#aes_encrypt(text, passphrase) ⇒ Object 



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# File 'lib/kafo/password_manager.rb', line 24

def aes_encrypt(text, passphrase)
  cipher = OpenSSL::Cipher::Cipher.new("aes-256-cbc")
  cipher.encrypt
  cipher.key = Digest::SHA2.hexdigest(passphrase)
  cipher.iv = Digest::SHA2.hexdigest(passphrase + passphrase)

  encrypted = cipher.update(text)
  encrypted << cipher.final
  Base64.encode64(encrypted)
end

#password(n = 32) ⇒ Object

generate a random password of lenght n

on ruby >= 1.9 we use builtin method urlsafe_base64, on olders we use our own implementation (inspired by urlsafe_base64)

the result may contain A-Z, a-z, 0-9, “-” and “_”. “=”



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# File 'lib/kafo/password_manager.rb', line 14

def password(n = 32)
  return SecureRandom.urlsafe_base64(n) if SecureRandom.respond_to?(:urlsafe_base64)

  s = [SecureRandom.random_bytes(n)].pack("m*")
  s.delete!("\n")
  s.tr!("+/", "-_")
  s.delete!("=")
  s
end