diff options
author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
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committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
commit | 0dc342de848a642ecce8db697b8fecd83a63e117 (patch) | |
tree | 2b7ed4724aff1f86073e4740134bda9c4aac1a39 /trunk/ext/digest/sha2/lib/sha2.rb | |
parent | ef70cf7138ab8034b5b806f466e4b484b24f0f88 (diff) |
added tag v1_9_0_4
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'trunk/ext/digest/sha2/lib/sha2.rb')
-rw-r--r-- | trunk/ext/digest/sha2/lib/sha2.rb | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/trunk/ext/digest/sha2/lib/sha2.rb b/trunk/ext/digest/sha2/lib/sha2.rb new file mode 100644 index 0000000000..52dd639f9b --- /dev/null +++ b/trunk/ext/digest/sha2/lib/sha2.rb @@ -0,0 +1,73 @@ +#-- +# sha2.rb - defines Digest::SHA2 class which wraps up the SHA256, +# SHA384, and SHA512 classes. +#++ +# Copyright (c) 2006 Akinori MUSHA <knu@iDaemons.org> +# +# All rights reserved. You can redistribute and/or modify it under the same +# terms as Ruby. +# +# $Id$ + +require 'digest' + +module Digest + # + # A meta digest provider class for SHA256, SHA384 and SHA512. + # + class SHA2 < Digest::Class + # call-seq: + # Digest::SHA2.new(bitlen = 256) -> digest_obj + # + # Creates a new SHA2 hash object with a given bit length. + def initialize(bitlen = 256) + case bitlen + when 256 + @sha2 = Digest::SHA256.new + when 384 + @sha2 = Digest::SHA384.new + when 512 + @sha2 = Digest::SHA512.new + else + raise ArgumentError, "unsupported bit length: %s" % bitlen.inspect + end + @bitlen = bitlen + end + + # :nodoc: + def reset + @sha2.reset + self + end + + # :nodoc: + def update(str) + @sha2.update(str) + self + end + alias << update + + def finish + @sha2.digest! + end + private :finish + + def block_length + @sha2.block_length + end + + def digest_length + @sha2.digest_length + end + + # :nodoc: + def initialize_copy(other) + @sha2 = other.instance_eval { @sha2.clone } + end + + # :nodoc: + def inspect + "#<%s:%d %s>" % [self.class.name, @bitlen, hexdigest] + end + end +end |