/usr/lib/ruby/vendor_ruby/net/ssh/transport/hmac/abstract.rb is in ruby-net-ssh 1:3.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | require 'openssl'
require 'openssl/digest'
module Net; module SSH; module Transport; module HMAC
# The base class of all OpenSSL-based HMAC algorithm wrappers.
class Abstract
class <<self
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
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
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
end
def key_length
self.class.key_length
end
def mac_length
self.class.mac_length
end
def digest_class
self.class.digest_class
end
# The key in use for this instance.
attr_reader :key
def initialize(key=nil)
self.key = key
end
# Sets the key to the given value, truncating it so that it is the correct
# length.
def key=(value)
@key = value ? value.to_s[0,key_length] : nil
end
# Compute the HMAC digest for the given data string.
def digest(data)
OpenSSL::HMAC.digest(digest_class.new, key, data)[0,mac_length]
end
end
end; end; end; end
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