# File lib/rye/key.rb, line 49
49:     def self.sign(secret, string, digesttype="sha1")
50:       @@digest ||= {} 
51:       @@digest[digest] ||= OpenSSL::Digest::Digest.new(digesttype)
52:       sig = OpenSSL::HMAC.hexdigest(@@digest[digest], secret, string).strip
53:     end