51 lines
1.1 KiB
Ruby
51 lines
1.1 KiB
Ruby
require 'digest.so'
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module Digest
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def self.const_missing(name)
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case name
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when :SHA256, :SHA384, :SHA512
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lib = 'digest/sha2.so'
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else
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lib = File.join('digest', name.to_s.downcase)
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end
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begin
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require lib
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rescue LoadError => e
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raise LoadError, "library not found for class Digest::#{name} -- #{lib}", caller(1)
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end
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unless Digest.const_defined?(name)
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raise NameError, "uninitialized constant Digest::#{name}", caller(1)
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end
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Digest.const_get(name)
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end
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class ::Digest::Class
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# creates a digest object and reads a given file, _name_.
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#
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# p Digest::SHA256.file("X11R6.8.2-src.tar.bz2").hexdigest
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# # => "f02e3c85572dc9ad7cb77c2a638e3be24cc1b5bea9fdbb0b0299c9668475c534"
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def self.file(name)
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new.file(name)
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end
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end
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module Instance
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# updates the digest with the contents of a given file _name_ and
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# returns self.
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def file(name)
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File.open(name, "rb") {|f|
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buf = ""
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while f.read(16384, buf)
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update buf
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end
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}
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self
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end
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end
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end
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def Digest(name)
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Digest.const_get(name)
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end
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