Digest::HMAC

 
               # File digest/lib/digest/hmac.rb, line 43
def initialize(key, digester)
  @md = digester.new

  block_len = @md.block_length

  if key.bytesize > block_len
    key = @md.digest(key)
  end

  ipad = Array.new(block_len).fill(0x36)
  opad = Array.new(block_len).fill(0x5c)

  key.bytes.each_with_index { |c, i|
    ipad[i] ^= c
    opad[i] ^= c
  }

  @key = key.freeze
  @ipad = ipad.inject('') { |s, c| s << c.chr }.freeze
  @opad = opad.inject('') { |s, c| s << c.chr }.freeze
  @md.update(@ipad)
end
            

 
               # File digest/lib/digest/hmac.rb, line 94
def block_length
  @md.block_length
end
            

 
               # File digest/lib/digest/hmac.rb, line 90
def digest_length
  @md.digest_length
end
            

 
               # File digest/lib/digest/hmac.rb, line 66
def initialize_copy(other)
  @md = other.instance_eval { @md.clone }
end
            

 
               # File digest/lib/digest/hmac.rb, line 98
def inspect
  sprintf('#<%s: key=%s, digest=%s>', self.class.name, @key.inspect, @md.inspect.sub(/^\#<(.*)>$/) { $1 });
end
            

 
               # File digest/lib/digest/hmac.rb, line 76
def reset
  @md.reset
  @md.update(@ipad)
  self
end
            

 
               # File digest/lib/digest/hmac.rb, line 70
def update(text)
  @md.update(text)
  self
end