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author | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-16 18:49:26 +0900 |
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committer | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-30 00:39:06 +0900 |
commit | fcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch) | |
tree | 64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/ext/digest/sha2/lib/sha2.rb |
Fresh start
Diffstat (limited to 'jni/ruby/ext/digest/sha2/lib/sha2.rb')
-rw-r--r-- | jni/ruby/ext/digest/sha2/lib/sha2.rb | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/jni/ruby/ext/digest/sha2/lib/sha2.rb b/jni/ruby/ext/digest/sha2/lib/sha2.rb new file mode 100644 index 0000000..fffc1f4 --- /dev/null +++ b/jni/ruby/ext/digest/sha2/lib/sha2.rb @@ -0,0 +1,107 @@ +#-- +# 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: sha2.rb 35293 2012-04-10 22:41:04Z drbrain $ + +require 'digest' +require 'digest/sha2.so' + +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. + # + # Valid bit lengths are 256, 384 and 512. + 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 + + # call-seq: + # digest_obj.reset -> digest_obj + # + # Resets the digest to the initial state and returns self. + def reset + @sha2.reset + self + end + + # call-seq: + # digest_obj.update(string) -> digest_obj + # digest_obj << string -> digest_obj + # + # Updates the digest using a given _string_ and returns self. + def update(str) + @sha2.update(str) + self + end + alias << update + + def finish # :nodoc: + @sha2.digest! + end + private :finish + + + # call-seq: + # digest_obj.block_length -> Integer + # + # Returns the block length of the digest in bytes. + # + # Digest::SHA256.new.block_length * 8 + # # => 512 + # Digest::SHA384.new.block_length * 8 + # # => 1024 + # Digest::SHA512.new.block_length * 8 + # # => 1024 + def block_length + @sha2.block_length + end + + # call-seq: + # digest_obj.digest_length -> Integer + # + # Returns the length of the hash value of the digest in bytes. + # + # Digest::SHA256.new.digest_length * 8 + # # => 256 + # Digest::SHA384.new.digest_length * 8 + # # => 384 + # Digest::SHA512.new.digest_length * 8 + # # => 512 + # + # For example, digests produced by Digest::SHA256 will always be 32 bytes + # (256 bits) in size. + def digest_length + @sha2.digest_length + end + + def initialize_copy(other) # :nodoc: + @sha2 = other.instance_eval { @sha2.clone } + end + + def inspect # :nodoc: + "#<%s:%d %s>" % [self.class.name, @bitlen, hexdigest] + end + end +end |