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* ext/digest/lib/digest/hmac.rb: Fix problems with update

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timing. [Reported by: oss-ruby@technorama.net]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@11322 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
knu 2006-12-03 07:36:06 +00:00
parent b326623cef
commit bd2df89b14
1 changed files with 6 additions and 2 deletions
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8
ext/digest/lib/digest/hmac.rb
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@ -60,6 +60,7 @@ module Digest
@key = key.freeze @key = key.freeze
@ipad = ipad.inject('') { |s, c| s << c.chr }.freeze @ipad = ipad.inject('') { |s, c| s << c.chr }.freeze
@opad = opad.inject('') { |s, c| s << c.chr }.freeze @opad = opad.inject('') { |s, c| s << c.chr }.freeze
@md.update(@ipad)
end end
def initialize_copy(other) def initialize_copy(other)
@ -67,17 +68,20 @@ module Digest
end end
def update(text) def update(text)
# @md is reset when digest() returns @md.update(text)
@md.update(@opad + @md.digest(@ipad + text))
self self
end end
def reset def reset
@md.reset @md.reset
@md.update(@ipad)
self self
end end
def finish def finish
d = @md.digest!
@md.update(@opad)
@md.update(d)
@md.digest! @md.digest!
end end
private :finish private :finish