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#--
#
# $RCSfile$
#
# = 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 licenced under the same licence as Ruby.
# (See the file 'LICENCE'.)
#
# = Version
# $Id: digest.rb 41809 2013-07-06 16:52:56Z nagachika $
#
#++
module OpenSSL
class Digest
alg = %w(DSS DSS1 MD2 MD4 MD5 MDC2 RIPEMD160 SHA SHA1)
if OPENSSL_VERSION_NUMBER > 0x00908000
alg += %w(SHA224 SHA256 SHA384 SHA512)
end
# Return the +data+ hash 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::SHA256.digest("abc")
def self.digest(name, data)
super(data, name)
end
alg.each{|name|
klass = Class.new(Digest){
define_method(:initialize){|*data|
if data.length > 1
raise ArgumentError,
"wrong number of arguments (#{data.length} for 1)"
end
super(name, data.first)
}
}
singleton = (class << klass; self; end)
singleton.class_eval{
define_method(:digest){|data| Digest.digest(name, data) }
define_method(:hexdigest){|data| Digest.hexdigest(name, data) }
}
const_set(name, klass)
}
# This class is only provided for backwards compatibility. Use OpenSSL::Digest in the future.
class Digest < Digest
def initialize(*args)
# add warning
super(*args)
end
end
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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