39 lines
1.2 KiB
Ruby
39 lines
1.2 KiB
Ruby
# -*- coding: binary -*-
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module Rex
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module Text
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# We are re-opening the module to add these module methods.
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# Breaking them up this way allows us to maintain a little higher
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# degree of organisation and make it easier to find what you're looking for
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# without hanging the underlying calls that we historically rely upon.
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# @param str [String] Data to checksum
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# @return [Integer] 8-bit checksum
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def self.checksum8(str)
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(str.unpack("C*").inject(:+) || 0) % 0x100
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end
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# @param str [String] Little-endian data to checksum
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# @return [Integer] 16-bit checksum
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def self.checksum16_le(str)
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(str.unpack("v*").inject(:+) || 0) % 0x10000
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end
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# @param str [String] Big-endian data to checksum
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# @return [Integer] 16-bit checksum
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def self.checksum16_be(str)
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(str.unpack("n*").inject(:+) || 0) % 0x10000
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end
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# @param str [String] Little-endian data to checksum
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# @return [Integer] 32-bit checksum
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def self.checksum32_le(str)
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(str.unpack("V*").inject(:+) || 0) % 0x100000000
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end
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# @param str [String] Big-endian data to checksum
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# @return [Integer] 32-bit checksum
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def self.checksum32_be(str)
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(str.unpack("N*").inject(:+) || 0) % 0x100000000
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end
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end
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end |