112 lines
3 KiB
Ruby
112 lines
3 KiB
Ruby
# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
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class Ldap
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# Class for handling LDAP GUIDs.
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# strongly inspired by
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# https://gist.github.com/astockwell/359c950fbc650c339eea
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# Big thanks to @astockwell
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class Guid
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# Checks if the given string is a valid GUID.
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#
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# @param string [String] The string that should be checked for valid GUID format.
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#
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# @example
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# Ldap::Guid.valid?('f742b361-32c6-4a92-baaa-eaae7df657ee')
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# #=> true
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#
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# @return [Boolean]
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def self.valid?(string)
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string.match?(%r{\w{8}-\w{4}-\w{4}-\w{4}-\w+})
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end
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# Convers a given GUID string into the HEX equivalent.
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#
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# @param string [String] The GUID string that should converted into HEX.
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#
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# @example
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# Ldap::Guid.hex('f742b361-32c6-4a92-baaa-eaae7df657ee')
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# #=> "a\xB3B\xF7\xC62\x92J\xBA\xAA\xEA\xAE}\xF6W\xEE".b
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#
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# @return [String] The HEX equivalent of the given GUID string.
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def self.hex(string)
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new(string).hex
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end
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# Convers a given HEX string into the GUID equivalent.
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#
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# @param string [String] The HEX string that should converted into a GUID.
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#
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# @example
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# Ldap::Guid.string("a\xB3B\xF7\xC62\x92J\xBA\xAA\xEA\xAE}\xF6W\xEE".b)
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# #=> 'f742b361-32c6-4a92-baaa-eaae7df657ee'
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#
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# @return [String] The GUID equivalent of the given HEX string.
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def self.string(hex)
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new(hex).string
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end
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# Initializes an instance for the LDAP::Guid class to convert from/to HEX and GUID strings.
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#
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# @param string [String] The HEX or GUID string that should converted.
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#
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# @example
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# guid = Ldap::Guid.new('f742b361-32c6-4a92-baaa-eaae7df657ee')
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#
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# @return [nil]
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def initialize(guid)
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@guid = guid
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end
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# Convers the GUID string into the HEX equivalent.
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#
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# @example
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# guid.hex
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# #=> "a\xB3B\xF7\xC62\x92J\xBA\xAA\xEA\xAE}\xF6W\xEE".b
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#
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# @return [String] The HEX equivalent of the GUID string.
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def hex
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[oracle_raw16(guid)].pack('H*')
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end
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# Convers the HEX string into the GUID equivalent.
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#
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# @example
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# guid.string
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# #=> 'f742b361-32c6-4a92-baaa-eaae7df657ee'
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#
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# @return [String] The GUID equivalent of the HEX string.
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def string
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oracle_raw16(guid.unpack1('H*'), dashify: true)
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end
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private
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attr_reader :guid
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def oracle_raw16(string, dashify: false)
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# remove dashes
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string.delete!('-')
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# split every two chars
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parts = string.scan(%r{.{1,2}})
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# re-order according to oracle format index and join
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oracle_format_indices = [3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, 12, 13, 14, 15]
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result = oracle_format_indices.map { |index| parts[index] }.join
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# add dashes if requested
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return result if !dashify
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[
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result[0..7],
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result[8..11],
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result[12..15],
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result[16..19],
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result[20..result.size]
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].join('-')
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end
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end
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end
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