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-rw-r--r--activesupport/lib/active_support/message_verifier.rb14
1 files changed, 7 insertions, 7 deletions
diff --git a/activesupport/lib/active_support/message_verifier.rb b/activesupport/lib/active_support/message_verifier.rb
index 6c46b68eaf..9a4468f73c 100644
--- a/activesupport/lib/active_support/message_verifier.rb
+++ b/activesupport/lib/active_support/message_verifier.rb
@@ -4,28 +4,28 @@ require 'active_support/core_ext/object/blank'
module ActiveSupport
# MessageVerifier makes it easy to generate and verify messages which are signed
# to prevent tampering.
- #
+ #
# This is useful for cases like remember-me tokens and auto-unsubscribe links where the
# session store isn't suitable or available.
#
# Remember Me:
# cookies[:remember_me] = @verifier.generate([@user.id, 2.weeks.from_now])
- #
+ #
# In the authentication filter:
#
# id, time = @verifier.verify(cookies[:remember_me])
# if time < Time.now
# self.current_user = User.find(id)
# end
- #
+ #
class MessageVerifier
class InvalidSignature < StandardError; end
-
+
def initialize(secret, digest = 'SHA1')
@secret = secret
@digest = digest
end
-
+
def verify(signed_message)
raise InvalidSignature if signed_message.blank?
@@ -36,12 +36,12 @@ module ActiveSupport
raise InvalidSignature
end
end
-
+
def generate(value)
data = ActiveSupport::Base64.encode64s(Marshal.dump(value))
"#{data}--#{generate_digest(data)}"
end
-
+
private
# constant-time comparison algorithm to prevent timing attacks
def secure_compare(a, b)