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# frozen_string_literal: true
#--
# = Ruby-space predefined Digest subclasses
#
# = Info
# 'OpenSSL for Ruby 2' project
# Copyright (C) 2002 Michal Rokos <m.rokos@sh.cvut.cz>
# All rights reserved.
#
# = Licence
# This program is licensed under the same licence as Ruby.
# (See the file 'LICENCE'.)
#++
module OpenSSL
class Digest
# Return the hash value computed with _name_ Digest. _name_ is either the
# long name or short name of a supported digest algorithm.
#
# === Examples
#
# OpenSSL::Digest.digest("SHA256", "abc")
#
# which is equivalent to:
#
# OpenSSL::Digest.digest('SHA256', "abc")
def self.digest(name, data)
super(data, name)
end
%w(MD4 MD5 RIPEMD160 SHA1 SHA224 SHA256 SHA384 SHA512).each do |name|
klass = Class.new(self) {
define_method(:initialize, ->(data = nil) {super(name, data)})
}
singleton = (class << klass; self; end)
singleton.class_eval{
define_method(:digest) {|data| new.digest(data)}
define_method(:hexdigest) {|data| new.hexdigest(data)}
}
const_set(name.tr('-', '_'), klass)
end
# Deprecated.
#
# This class is only provided for backwards compatibility.
# Use OpenSSL::Digest instead.
class Digest < Digest; end # :nodoc:
deprecate_constant :Digest
end # Digest
# Returns a Digest subclass by _name_
#
# require 'openssl'
#
# OpenSSL::Digest("MD5")
# # => OpenSSL::Digest::MD5
#
# Digest("Foo")
# # => NameError: wrong constant name Foo
def Digest(name)
OpenSSL::Digest.const_get(name)
end
module_function :Digest
end # OpenSSL
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