diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/middleware/cookies.rb')
| -rw-r--r-- | actionpack/lib/action_dispatch/middleware/cookies.rb | 154 |
1 files changed, 115 insertions, 39 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/cookies.rb b/actionpack/lib/action_dispatch/middleware/cookies.rb index fe110d7938..b7687ca100 100644 --- a/actionpack/lib/action_dispatch/middleware/cookies.rb +++ b/actionpack/lib/action_dispatch/middleware/cookies.rb @@ -3,6 +3,7 @@ require 'active_support/core_ext/module/attribute_accessors' require 'active_support/core_ext/object/blank' require 'active_support/key_generator' require 'active_support/message_verifier' +require 'active_support/json' module ActionDispatch class Request < Rack::Request @@ -23,15 +24,15 @@ module ActionDispatch # # This cookie will be deleted when the user's browser is closed. # cookies[:user_name] = "david" # - # # Assign an array of values to a cookie. - # cookies[:lat_lon] = [47.68, -122.37] + # # Cookie values are String based. Other data types need to be serialized. + # cookies[:lat_lon] = JSON.generate([47.68, -122.37]) # # # Sets a cookie that expires in 1 hour. # cookies[:login] = { value: "XJ-122", expires: 1.hour.from_now } # # # Sets a signed cookie, which prevents users from tampering with its value. - # # The cookie is signed by your app's <tt>secrets.secret_key_base</tt> value. - # # It can be read using the signed method <tt>cookies.signed[:name]</tt> + # # The cookie is signed by your app's `secrets.secret_key_base` value. + # # It can be read using the signed method `cookies.signed[:name]` # cookies.signed[:user_id] = current_user.id # # # Sets a "permanent" cookie (which expires in 20 years from now). @@ -42,10 +43,10 @@ module ActionDispatch # # Examples of reading: # - # cookies[:user_name] # => "david" - # cookies.size # => 2 - # cookies[:lat_lon] # => [47.68, -122.37] - # cookies.signed[:login] # => "XJ-122" + # cookies[:user_name] # => "david" + # cookies.size # => 2 + # JSON.parse(cookies[:lat_lon]) # => [47.68, -122.37] + # cookies.signed[:login] # => "XJ-122" # # Example for deleting: # @@ -63,18 +64,20 @@ module ActionDispatch # # The option symbols for setting cookies are: # - # * <tt>:value</tt> - The cookie's value or list of values (as an array). + # * <tt>:value</tt> - The cookie's value. # * <tt>:path</tt> - The path for which this cookie applies. Defaults to the root # of the application. # * <tt>:domain</tt> - The domain for which this cookie applies so you can # restrict to the domain level. If you use a schema like www.example.com # and want to share session with user.example.com set <tt>:domain</tt> # to <tt>:all</tt>. Make sure to specify the <tt>:domain</tt> option with - # <tt>:all</tt> again when deleting cookies. + # <tt>:all</tt> or <tt>Array</tt> again when deleting cookies. # - # domain: nil # Does not sets cookie domain. (default) + # domain: nil # Does not set cookie domain. (default) # domain: :all # Allow the cookie for the top most level - # domain and subdomains. + # # domain and subdomains. + # domain: %w(.example.com .example.org) # Allow the cookie + # # for concrete domain names. # # * <tt>:expires</tt> - The time at which this cookie expires, as a \Time object. # * <tt>:secure</tt> - Whether this cookie is only transmitted to HTTPS servers. @@ -89,6 +92,8 @@ module ActionDispatch ENCRYPTED_SIGNED_COOKIE_SALT = "action_dispatch.encrypted_signed_cookie_salt".freeze SECRET_TOKEN = "action_dispatch.secret_token".freeze SECRET_KEY_BASE = "action_dispatch.secret_key_base".freeze + COOKIES_SERIALIZER = "action_dispatch.cookies_serializer".freeze + COOKIES_DIGEST = "action_dispatch.cookies_digest".freeze # Cookies can typically store 4096 bytes. MAX_COOKIE_SIZE = 4096 @@ -117,7 +122,7 @@ module ActionDispatch # the cookie again. This is useful for creating cookies with values that the user is not supposed to change. If a signed # cookie was tampered with by the user (or a 3rd party), nil will be returned. # - # If +secrets.secret_key_base+ and +config.secret_token+ (deprecated) are both set, + # If +secrets.secret_key_base+ and +secrets.secret_token+ (deprecated) are both set, # legacy cookies signed with the old key generator will be transparently upgraded. # # This jar requires that you set a suitable secret for the verification on your app's +secrets.secret_key_base+. @@ -140,7 +145,7 @@ module ActionDispatch # Returns a jar that'll automatically encrypt cookie values before sending them to the client and will decrypt them for read. # If the cookie was tampered with by the user (or a 3rd party), nil will be returned. # - # If +secrets.secret_key_base+ and +config.secret_token+ (deprecated) are both set, + # If +secrets.secret_key_base+ and +secrets.secret_token+ (deprecated) are both set, # legacy cookies signed with the old key generator will be transparently upgraded. # # This jar requires that you set a suitable secret for the verification on your app's +secrets.secret_key_base+. @@ -172,15 +177,19 @@ module ActionDispatch end end + # Passing the ActiveSupport::MessageEncryptor::NullSerializer downstream + # to the Message{Encryptor,Verifier} allows us to handle the + # (de)serialization step within the cookie jar, which gives us the + # opportunity to detect and migrate legacy cookies. module VerifyAndUpgradeLegacySignedMessage def initialize(*args) super - @legacy_verifier = ActiveSupport::MessageVerifier.new(@options[:secret_token]) + @legacy_verifier = ActiveSupport::MessageVerifier.new(@options[:secret_token], serializer: ActiveSupport::MessageEncryptor::NullSerializer) end def verify_and_upgrade_legacy_signed_message(name, signed_message) - @legacy_verifier.verify(signed_message).tap do |value| - self[name] = value + deserialize(name, @legacy_verifier.verify(signed_message)).tap do |value| + self[name] = { value: value } end rescue ActiveSupport::MessageVerifier::InvalidSignature nil @@ -210,7 +219,9 @@ module ActionDispatch encrypted_signed_cookie_salt: env[ENCRYPTED_SIGNED_COOKIE_SALT] || '', secret_token: env[SECRET_TOKEN], secret_key_base: env[SECRET_KEY_BASE], - upgrade_legacy_signed_cookies: env[SECRET_TOKEN].present? && env[SECRET_KEY_BASE].present? + upgrade_legacy_signed_cookies: env[SECRET_TOKEN].present? && env[SECRET_KEY_BASE].present?, + serializer: env[COOKIES_SERIALIZER], + digest: env[COOKIES_DIGEST] } end @@ -235,6 +246,15 @@ module ActionDispatch @secure = secure @options = options @cookies = {} + @committed = false + end + + def committed?; @committed; end + + def commit! + @committed = true + @set_cookies.freeze + @delete_cookies.freeze end def each(&block) @@ -263,7 +283,7 @@ module ActionDispatch def handle_options(options) #:nodoc: options[:path] ||= "/" - if options[:domain] == :all + if options[:domain] == :all || options[:domain] == 'all' # if there is a provided tld length then we use it otherwise default domain regexp domain_regexp = options[:tld_length] ? /([^.]+\.?){#{options[:tld_length]}}$/ : DOMAIN_REGEXP @@ -278,8 +298,8 @@ module ActionDispatch end end - # Sets the cookie named +name+. The second argument may be the very cookie - # value, or a hash of options as documented above. + # Sets the cookie named +name+. The second argument may be the cookie's + # value or a hash of options as documented above. def []=(name, options) if options.is_a?(Hash) options.symbolize_keys! @@ -334,8 +354,8 @@ module ActionDispatch end def recycle! #:nodoc: - @set_cookies.clear - @delete_cookies.clear + @set_cookies = {} + @delete_cookies = {} end mattr_accessor :always_write_cookie @@ -372,31 +392,83 @@ module ActionDispatch end end + class JsonSerializer + def self.load(value) + ActiveSupport::JSON.decode(value) + end + + def self.dump(value) + ActiveSupport::JSON.encode(value) + end + end + + module SerializedCookieJars + MARSHAL_SIGNATURE = "\x04\x08".freeze + + protected + def needs_migration?(value) + @options[:serializer] == :hybrid && value.start_with?(MARSHAL_SIGNATURE) + end + + def serialize(value) + serializer.dump(value) + end + + def deserialize(name, value) + if value + if needs_migration?(value) + Marshal.load(value).tap do |v| + self[name] = { value: v } + end + else + serializer.load(value) + end + end + end + + def serializer + serializer = @options[:serializer] || :marshal + case serializer + when :marshal + Marshal + when :json, :hybrid + JsonSerializer + else + serializer + end + end + + def digest + @options[:digest] || 'SHA1' + end + end + class SignedCookieJar #:nodoc: include ChainedCookieJars + include SerializedCookieJars def initialize(parent_jar, key_generator, options = {}) @parent_jar = parent_jar @options = options secret = key_generator.generate_key(@options[:signed_cookie_salt]) - @verifier = ActiveSupport::MessageVerifier.new(secret) + @verifier = ActiveSupport::MessageVerifier.new(secret, digest: digest, serializer: ActiveSupport::MessageEncryptor::NullSerializer) end def [](name) if signed_message = @parent_jar[name] - verify(signed_message) + deserialize name, verify(signed_message) end end def []=(name, options) if options.is_a?(Hash) options.symbolize_keys! - options[:value] = @verifier.generate(options[:value]) + options[:value] = @verifier.generate(serialize(options[:value])) else - options = { :value => @verifier.generate(options) } + options = { :value => @verifier.generate(serialize(options)) } end - raise CookieOverflow if options[:value].size > MAX_COOKIE_SIZE + raise CookieOverflow if options[:value].bytesize > MAX_COOKIE_SIZE @parent_jar[name] = options end @@ -409,7 +481,7 @@ module ActionDispatch end # UpgradeLegacySignedCookieJar is used instead of SignedCookieJar if - # config.secret_token and secrets.secret_key_base are both set. It reads + # secrets.secret_token and secrets.secret_key_base are both set. It reads # legacy cookies signed with the old dummy key generator and re-saves # them using the new key generator to provide a smooth upgrade path. class UpgradeLegacySignedCookieJar < SignedCookieJar #:nodoc: @@ -417,13 +489,14 @@ module ActionDispatch def [](name) if signed_message = @parent_jar[name] - verify(signed_message) || verify_and_upgrade_legacy_signed_message(name, signed_message) + deserialize(name, verify(signed_message)) || verify_and_upgrade_legacy_signed_message(name, signed_message) end end end class EncryptedCookieJar #:nodoc: include ChainedCookieJars + include SerializedCookieJars def initialize(parent_jar, key_generator, options = {}) if ActiveSupport::LegacyKeyGenerator === key_generator @@ -435,12 +508,12 @@ module ActionDispatch @options = options secret = key_generator.generate_key(@options[:encrypted_cookie_salt]) sign_secret = key_generator.generate_key(@options[:encrypted_signed_cookie_salt]) - @encryptor = ActiveSupport::MessageEncryptor.new(secret, sign_secret) + @encryptor = ActiveSupport::MessageEncryptor.new(secret, sign_secret, digest: digest, serializer: ActiveSupport::MessageEncryptor::NullSerializer) end def [](name) if encrypted_message = @parent_jar[name] - decrypt_and_verify(encrypted_message) + deserialize name, decrypt_and_verify(encrypted_message) end end @@ -450,9 +523,10 @@ module ActionDispatch else options = { :value => options } end - options[:value] = @encryptor.encrypt_and_sign(options[:value]) - raise CookieOverflow if options[:value].size > MAX_COOKIE_SIZE + options[:value] = @encryptor.encrypt_and_sign(serialize(options[:value])) + + raise CookieOverflow if options[:value].bytesize > MAX_COOKIE_SIZE @parent_jar[name] = options end @@ -465,7 +539,7 @@ module ActionDispatch end # UpgradeLegacyEncryptedCookieJar is used by ActionDispatch::Session::CookieStore - # instead of EncryptedCookieJar if config.secret_token and secrets.secret_key_base + # instead of EncryptedCookieJar if secrets.secret_token and secrets.secret_key_base # are both set. It reads legacy cookies signed with the old dummy key generator and # encrypts and re-saves them using the new key generator to provide a smooth upgrade path. class UpgradeLegacyEncryptedCookieJar < EncryptedCookieJar #:nodoc: @@ -473,7 +547,7 @@ module ActionDispatch def [](name) if encrypted_or_signed_message = @parent_jar[name] - decrypt_and_verify(encrypted_or_signed_message) || verify_and_upgrade_legacy_signed_message(name, encrypted_or_signed_message) + deserialize(name, decrypt_and_verify(encrypted_or_signed_message)) || verify_and_upgrade_legacy_signed_message(name, encrypted_or_signed_message) end end end @@ -486,9 +560,11 @@ module ActionDispatch status, headers, body = @app.call(env) if cookie_jar = env['action_dispatch.cookies'] - cookie_jar.write(headers) - if headers[HTTP_HEADER].respond_to?(:join) - headers[HTTP_HEADER] = headers[HTTP_HEADER].join("\n") + unless cookie_jar.committed? + cookie_jar.write(headers) + if headers[HTTP_HEADER].respond_to?(:join) + headers[HTTP_HEADER] = headers[HTTP_HEADER].join("\n") + end end end |