class Net::SSH::Transport::HMAC::Abstract
The base class of all OpenSSL-based HMAC
algorithm wrappers.
Attributes
The key in use for this instance.
Public Class Methods
Source
# File lib/net/ssh/transport/hmac/abstract.rb, line 11 def aead(*v) @aead = false if !defined?(@aead) if v.empty? @aead = superclass.aead if @aead.nil? && superclass.respond_to?(:aead) return @aead elsif v.length == 1 @aead = v.first else raise ArgumentError, "wrong number of arguments (#{v.length} for 1)" end end
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# File lib/net/ssh/transport/hmac/abstract.rb, line 59 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
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# File lib/net/ssh/transport/hmac/abstract.rb, line 23 def etm(*v) @etm = false if !defined?(@etm) if v.empty? @etm = superclass.etm if @etm.nil? && superclass.respond_to?(:etm) return @etm elsif v.length == 1 @etm = v.first else raise ArgumentError, "wrong number of arguments (#{v.length} for 1)" end end
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# File lib/net/ssh/transport/hmac/abstract.rb, line 35 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
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# File lib/net/ssh/transport/hmac/abstract.rb, line 47 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
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# File lib/net/ssh/transport/hmac/abstract.rb, line 95 def initialize(key = nil) self.key = key end
Public Instance Methods
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# File lib/net/ssh/transport/hmac/abstract.rb, line 106 def digest(data) OpenSSL::HMAC.digest(digest_class.new, key, data)[0, mac_length] end
Compute the HMAC
digest for the given data string.
Source
# File lib/net/ssh/transport/hmac/abstract.rb, line 88 def digest_class self.class.digest_class end
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# File lib/net/ssh/transport/hmac/abstract.rb, line 101 def key=(value) @key = value ? value.to_s[0, key_length] : nil end
Sets the key to the given value, truncating it so that it is the correct length.
Source
# File lib/net/ssh/transport/hmac/abstract.rb, line 80 def key_length self.class.key_length end
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# File lib/net/ssh/transport/hmac/abstract.rb, line 84 def mac_length self.class.mac_length end