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-rw-r--r--activesupport/lib/active_support/message_verifier.rb8
1 files changed, 7 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/message_verifier.rb b/activesupport/lib/active_support/message_verifier.rb
index 64c5232cf4..4c3deffe6e 100644
--- a/activesupport/lib/active_support/message_verifier.rb
+++ b/activesupport/lib/active_support/message_verifier.rb
@@ -15,7 +15,7 @@ module ActiveSupport
# In the authentication filter:
#
# id, time = @verifier.verify(cookies[:remember_me])
- # if time < Time.now
+ # if Time.now < time
# self.current_user = User.find(id)
# end
#
@@ -24,6 +24,12 @@ module ActiveSupport
# hash upon initialization:
#
# @verifier = ActiveSupport::MessageVerifier.new('s3Krit', serializer: YAML)
+ #
+ # +MessageVerifier+ creates HMAC signatures using SHA1 hash algorithm by default.
+ # If you want to use a different hash algorithm, you can change it by providing
+ # `:digest` key as an option while initializing the verifier:
+ #
+ # @verifier = ActiveSupport::MessageVerifier.new('s3Krit', digest: 'SHA256')
class MessageVerifier
class InvalidSignature < StandardError; end