diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/middleware/cookies.rb')
| -rw-r--r-- | actionpack/lib/action_dispatch/middleware/cookies.rb | 198 |
1 files changed, 99 insertions, 99 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/cookies.rb b/actionpack/lib/action_dispatch/middleware/cookies.rb index 36a0db6e61..968a6c539e 100644 --- a/actionpack/lib/action_dispatch/middleware/cookies.rb +++ b/actionpack/lib/action_dispatch/middleware/cookies.rb @@ -1,5 +1,6 @@ require 'active_support/core_ext/hash/keys' 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' @@ -86,7 +87,8 @@ module ActionDispatch SIGNED_COOKIE_SALT = "action_dispatch.signed_cookie_salt".freeze ENCRYPTED_COOKIE_SALT = "action_dispatch.encrypted_cookie_salt".freeze ENCRYPTED_SIGNED_COOKIE_SALT = "action_dispatch.encrypted_signed_cookie_salt".freeze - TOKEN_KEY = "action_dispatch.secret_token".freeze + SECRET_TOKEN = "action_dispatch.secret_token".freeze + SECRET_KEY_BASE = "action_dispatch.secret_key_base".freeze # Cookies can typically store 4096 bytes. MAX_COOKIE_SIZE = 4096 @@ -94,8 +96,70 @@ module ActionDispatch # Raised when storing more than 4K of session data. CookieOverflow = Class.new StandardError + # Include in a cookie jar to allow chaining, e.g. cookies.permanent.signed + module ChainedCookieJars + # Returns a jar that'll automatically set the assigned cookies to have an expiration date 20 years from now. Example: + # + # cookies.permanent[:prefers_open_id] = true + # # => Set-Cookie: prefers_open_id=true; path=/; expires=Sun, 16-Dec-2029 03:24:16 GMT + # + # This jar is only meant for writing. You'll read permanent cookies through the regular accessor. + # + # This jar allows chaining with the signed jar as well, so you can set permanent, signed cookies. Examples: + # + # cookies.permanent.signed[:remember_me] = current_user.id + # # => Set-Cookie: remember_me=BAhU--848956038e692d7046deab32b7131856ab20e14e; path=/; expires=Sun, 16-Dec-2029 03:24:16 GMT + def permanent + @permanent ||= PermanentCookieJar.new(self, @key_generator, @options) + end + + # Returns a jar that'll automatically generate a signed representation of cookie value and verify it when reading from + # 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), an ActiveSupport::MessageVerifier::InvalidSignature exception will + # be raised. + # + # This jar requires that you set a suitable secret for the verification on your app's +config.secret_key_base+. + # + # Example: + # + # cookies.signed[:discount] = 45 + # # => Set-Cookie: discount=BAhpMg==--2c1c6906c90a3bc4fd54a51ffb41dffa4bf6b5f7; path=/ + # + # cookies.signed[:discount] # => 45 + def signed + @signed ||= begin + if @options[:upgrade_legacy_signed_cookie_jar] + UpgradeLegacySignedCookieJar.new(self, @key_generator, @options) + else + SignedCookieJar.new(self, @key_generator, @options) + end + end + end + + # Only needed for supporting the +UpgradeSignatureToEncryptionCookieStore+, users and plugin authors should not use this + def signed_using_old_secret #:nodoc: + @signed_using_old_secret ||= SignedCookieJar.new(self, ActiveSupport::DummyKeyGenerator.new(@options[:secret_token]), @options) + end + + # 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), an ActiveSupport::MessageVerifier::InvalidSignature exception + # will be raised. + # + # This jar requires that you set a suitable secret for the verification on your app's +config.secret_key_base+. + # + # Example: + # + # cookies.encrypted[:discount] = 45 + # # => Set-Cookie: discount=ZS9ZZ1R4cG1pcUJ1bm80anhQang3dz09LS1mbDZDSU5scGdOT3ltQ2dTdlhSdWpRPT0%3D--ab54663c9f4e3bc340c790d6d2b71e92f5b60315; path=/ + # + # cookies.encrypted[:discount] # => 45 + def encrypted + @encrypted ||= EncryptedCookieJar.new(self, @key_generator, @options) + end + end + class CookieJar #:nodoc: - include Enumerable + include Enumerable, ChainedCookieJars # This regular expression is used to split the levels of a domain. # The top level domain can be any string without a period or @@ -115,7 +179,10 @@ module ActionDispatch { signed_cookie_salt: env[SIGNED_COOKIE_SALT] || '', encrypted_cookie_salt: env[ENCRYPTED_COOKIE_SALT] || '', encrypted_signed_cookie_salt: env[ENCRYPTED_SIGNED_COOKIE_SALT] || '', - token_key: env[TOKEN_KEY] } + secret_token: env[SECRET_TOKEN], + secret_key_base: env[SECRET_KEY_BASE], + upgrade_legacy_signed_cookie_jar: env[SECRET_TOKEN].present? && env[SECRET_KEY_BASE].present? + } end def self.build(request) @@ -232,59 +299,6 @@ module ActionDispatch @cookies.each_key{ |k| delete(k, options) } end - # Returns a jar that'll automatically set the assigned cookies to have an expiration date 20 years from now. Example: - # - # cookies.permanent[:prefers_open_id] = true - # # => Set-Cookie: prefers_open_id=true; path=/; expires=Sun, 16-Dec-2029 03:24:16 GMT - # - # This jar is only meant for writing. You'll read permanent cookies through the regular accessor. - # - # This jar allows chaining with the signed jar as well, so you can set permanent, signed cookies. Examples: - # - # cookies.permanent.signed[:remember_me] = current_user.id - # # => Set-Cookie: remember_me=BAhU--848956038e692d7046deab32b7131856ab20e14e; path=/; expires=Sun, 16-Dec-2029 03:24:16 GMT - def permanent - @permanent ||= PermanentCookieJar.new(self, @key_generator, @options) - end - - # Returns a jar that'll automatically generate a signed representation of cookie value and verify it when reading from - # 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), an ActiveSupport::MessageVerifier::InvalidSignature exception will - # be raised. - # - # This jar requires that you set a suitable secret for the verification on your app's +config.secret_key_base+. - # - # Example: - # - # cookies.signed[:discount] = 45 - # # => Set-Cookie: discount=BAhpMg==--2c1c6906c90a3bc4fd54a51ffb41dffa4bf6b5f7; path=/ - # - # cookies.signed[:discount] # => 45 - def signed - @signed ||= SignedCookieJar.new(self, @key_generator, @options) - end - - # Only needed for supporting the +UpgradeSignatureToEncryptionCookieStore+, users and plugin authors should not use this - def signed_using_old_secret #:nodoc: - @signed_using_old_secret ||= SignedCookieJar.new(self, ActiveSupport::DummyKeyGenerator.new(@options[:token_key]), @options) - end - - # 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), an ActiveSupport::MessageVerifier::InvalidSignature exception - # will be raised. - # - # This jar requires that you set a suitable secret for the verification on your app's +config.secret_key_base+. - # - # Example: - # - # cookies.encrypted[:discount] = 45 - # # => Set-Cookie: discount=ZS9ZZ1R4cG1pcUJ1bm80anhQang3dz09LS1mbDZDSU5scGdOT3ltQ2dTdlhSdWpRPT0%3D--ab54663c9f4e3bc340c790d6d2b71e92f5b60315; path=/ - # - # cookies.encrypted[:discount] # => 45 - def encrypted - @encrypted ||= EncryptedCookieJar.new(self, @key_generator, @options) - end - def write(headers) @set_cookies.each { |k, v| ::Rack::Utils.set_cookie_header!(headers, k, v) if write_cookie?(v) } @delete_cookies.each { |k, v| ::Rack::Utils.delete_cookie_header!(headers, k, v) } @@ -306,6 +320,8 @@ module ActionDispatch end class PermanentCookieJar #:nodoc: + include ChainedCookieJars + def initialize(parent_jar, key_generator, options = {}) @parent_jar = parent_jar @key_generator = key_generator @@ -326,26 +342,11 @@ module ActionDispatch options[:expires] = 20.years.from_now @parent_jar[key] = options end - - def permanent - @permanent ||= PermanentCookieJar.new(self, @key_generator, @options) - end - - def signed - @signed ||= SignedCookieJar.new(self, @key_generator, @options) - end - - def encrypted - @encrypted ||= EncryptedCookieJar.new(self, @key_generator, @options) - end - - def method_missing(method, *arguments, &block) - ActiveSupport::Deprecation.warn "#{method} is deprecated with no replacement. " + - "You probably want to try this method over the parent CookieJar." - end end class SignedCookieJar #:nodoc: + include ChainedCookieJars + def initialize(parent_jar, key_generator, options = {}) @parent_jar = parent_jar @options = options @@ -372,26 +373,42 @@ module ActionDispatch raise CookieOverflow if options[:value].size > MAX_COOKIE_SIZE @parent_jar[key] = options end + end - def permanent - @permanent ||= PermanentCookieJar.new(self, @key_generator, @options) + # UpgradeLegacySignedCookieJar is used instead of SignedCookieJar if + # config.secret_token and config.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: + def initialize(*args) + super + @legacy_verifier = ActiveSupport::MessageVerifier.new(@options[:secret_token]) end - def signed - @signed ||= SignedCookieJar.new(self, @key_generator, @options) + def [](name) + if signed_message = @parent_jar[name] + verify_signed_message(signed_message) || verify_and_upgrade_legacy_signed_message(name, signed_message) + end end - def encrypted - @encrypted ||= EncryptedCookieJar.new(self, @key_generator, @options) + def verify_signed_message(signed_message) + @verifier.verify(signed_message) + rescue ActiveSupport::MessageVerifier::InvalidSignature + nil end - def method_missing(method, *arguments, &block) - ActiveSupport::Deprecation.warn "#{method} is deprecated with no replacement. " + - "You probably want to try this method over the parent CookieJar." + def verify_and_upgrade_legacy_signed_message(name, signed_message) + @legacy_verifier.verify(signed_message).tap do |value| + self[name] = value + end + rescue ActiveSupport::MessageVerifier::InvalidSignature + nil end end class EncryptedCookieJar #:nodoc: + include ChainedCookieJars + def initialize(parent_jar, key_generator, options = {}) if ActiveSupport::DummyKeyGenerator === key_generator raise "Encrypted Cookies must be used in conjunction with config.secret_key_base." + @@ -425,23 +442,6 @@ module ActionDispatch raise CookieOverflow if options[:value].size > MAX_COOKIE_SIZE @parent_jar[key] = options end - - def permanent - @permanent ||= PermanentCookieJar.new(self, @key_generator, @options) - end - - def signed - @signed ||= SignedCookieJar.new(self, @key_generator, @options) - end - - def encrypted - @encrypted ||= EncryptedCookieJar.new(self, @key_generator, @options) - end - - def method_missing(method, *arguments, &block) - ActiveSupport::Deprecation.warn "#{method} is deprecated with no replacement. " + - "You probably want to try this method over the parent CookieJar." - end end def initialize(app) |