diff options
Diffstat (limited to 'activesupport/lib/active_support/message_encryptor.rb')
-rw-r--r-- | activesupport/lib/active_support/message_encryptor.rb | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/activesupport/lib/active_support/message_encryptor.rb b/activesupport/lib/active_support/message_encryptor.rb index b7dc0689b0..92ab6fe648 100644 --- a/activesupport/lib/active_support/message_encryptor.rb +++ b/activesupport/lib/active_support/message_encryptor.rb @@ -1,5 +1,6 @@ require 'openssl' require 'base64' +require 'active_support/core_ext/array/extract_options' module ActiveSupport # MessageEncryptor is a simple way to encrypt values which get stored @@ -11,10 +12,11 @@ module ActiveSupport # This can be used in situations similar to the <tt>MessageVerifier</tt>, but # where you don't want users to be able to determine the value of the payload. # - # key = OpenSSL::Digest::SHA256.new('password').digest # => "\x89\xE0\x156\xAC..." - # crypt = ActiveSupport::MessageEncryptor.new(key) # => #<ActiveSupport::MessageEncryptor ...> - # encrypted_data = crypt.encrypt_and_sign('my secret data') # => "NlFBTTMwOUV5UlA1QlNEN2xkY2d6eThYWWh..." - # crypt.decrypt_and_verify(encrypted_data) # => "my secret data" + # salt = SecureRandom.random_bytes(64) + # key = ActiveSupport::KeyGenerator.new('password').generate_key(salt) # => "\x89\xE0\x156\xAC..." + # crypt = ActiveSupport::MessageEncryptor.new(key) # => #<ActiveSupport::MessageEncryptor ...> + # encrypted_data = crypt.encrypt_and_sign('my secret data') # => "NlFBTTMwOUV5UlA1QlNEN2xkY2d6eThYWWh..." + # crypt.decrypt_and_verify(encrypted_data) # => "my secret data" class MessageEncryptor module NullSerializer #:nodoc: def self.load(value) @@ -27,7 +29,7 @@ module ActiveSupport end class InvalidMessage < StandardError; end - OpenSSLCipherError = OpenSSL::Cipher.const_defined?(:CipherError) ? OpenSSL::Cipher::CipherError : OpenSSL::CipherError + OpenSSLCipherError = OpenSSL::Cipher::CipherError # Initialize a new MessageEncryptor. +secret+ must be at least as long as # the cipher key size. For the default 'aes-256-cbc' cipher, this is 256 @@ -38,6 +40,7 @@ module ActiveSupport # Options: # * <tt>:cipher</tt> - Cipher to use. Can be any cipher returned by # <tt>OpenSSL::Cipher.ciphers</tt>. Default is 'aes-256-cbc'. + # * <tt>:digest</tt> - String of digest to use for signing. Default is +SHA1+. # * <tt>:serializer</tt> - Object serializer to use. Default is +Marshal+. def initialize(secret, *signature_key_or_options) options = signature_key_or_options.extract_options! @@ -45,7 +48,7 @@ module ActiveSupport @secret = secret @sign_secret = sign_secret @cipher = options[:cipher] || 'aes-256-cbc' - @verifier = MessageVerifier.new(@sign_secret || @secret, :serializer => NullSerializer) + @verifier = MessageVerifier.new(@sign_secret || @secret, digest: options[:digest] || 'SHA1', serializer: NullSerializer) @serializer = options[:serializer] || Marshal end @@ -65,22 +68,21 @@ module ActiveSupport def _encrypt(value) cipher = new_cipher - # Rely on OpenSSL for the initialization vector - iv = cipher.random_iv - cipher.encrypt cipher.key = @secret - cipher.iv = iv + + # Rely on OpenSSL for the initialization vector + iv = cipher.random_iv encrypted_data = cipher.update(@serializer.dump(value)) encrypted_data << cipher.final - [encrypted_data, iv].map {|v| ::Base64.strict_encode64(v)}.join("--") + "#{::Base64.strict_encode64 encrypted_data}--#{::Base64.strict_encode64 iv}" end def _decrypt(encrypted_message) cipher = new_cipher - encrypted_data, iv = encrypted_message.split("--").map {|v| ::Base64.decode64(v)} + encrypted_data, iv = encrypted_message.split("--").map {|v| ::Base64.strict_decode64(v)} cipher.decrypt cipher.key = @secret @@ -90,7 +92,7 @@ module ActiveSupport decrypted_data << cipher.final @serializer.load(decrypted_data) - rescue OpenSSLCipherError, TypeError + rescue OpenSSLCipherError, TypeError, ArgumentError raise InvalidMessage end |