The base class of all OpenSSL-based HMAC algorithm wrappers.
The key in use for this instance.
# File lib/net/ssh/transport/hmac/abstract.rb, line 34 def digest_class(*v) @digest_class = nil if !defined?(@digest_class) if v.empty? @digest_class = superclass.digest_class if @digest_class.nil? && superclass.respond_to?(:digest_class) return @digest_class elsif v.length == 1 @digest_class = v.first else raise ArgumentError, "wrong number of arguments (#{v.length} for 1)" end end
# File lib/net/ssh/transport/hmac/abstract.rb, line 10 def key_length(*v) @key_length = nil if !defined?(@key_length) if v.empty? @key_length = superclass.key_length if @key_length.nil? && superclass.respond_to?(:key_length) return @key_length elsif v.length == 1 @key_length = v.first else raise ArgumentError, "wrong number of arguments (#{v.length} for 1)" end end
# File lib/net/ssh/transport/hmac/abstract.rb, line 22 def mac_length(*v) @mac_length = nil if !defined?(@mac_length) if v.empty? @mac_length = superclass.mac_length if @mac_length.nil? && superclass.respond_to?(:mac_length) return @mac_length elsif v.length == 1 @mac_length = v.first else raise ArgumentError, "wrong number of arguments (#{v.length} for 1)" end end
# File lib/net/ssh/transport/hmac/abstract.rb, line 62 def initialize(key=nil) self.key = key end
Compute the HMAC digest for the given data string.
# File lib/net/ssh/transport/hmac/abstract.rb, line 73 def digest(data) OpenSSL::HMAC.digest(digest_class.new, key, data)[0,mac_length] end
# File lib/net/ssh/transport/hmac/abstract.rb, line 55 def digest_class self.class.digest_class end
Sets the key to the given value, truncating it so that it is the correct length.
# File lib/net/ssh/transport/hmac/abstract.rb, line 68 def key=(value) @key = value ? value.to_s[0,key_length] : nil end
# File lib/net/ssh/transport/hmac/abstract.rb, line 47 def key_length self.class.key_length end
# File lib/net/ssh/transport/hmac/abstract.rb, line 51 def mac_length self.class.mac_length end