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70 lines
2.4 KiB
70 lines
2.4 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is a project management system.
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# Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2013 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# See doc/COPYRIGHT.rdoc for more details.
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#++
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##
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# LEGACY password hashing method using salted SHA-1
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# This is only included for testing hashed passwords and will raise when trying
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# to save new passwords with that strategy.
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class UserPassword::SHA1 < UserPassword
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protected
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##
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# Determines whether the hashed value of +plain+ matches the stored password hash.
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def hash_matches?(plain)
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test_hash = derive_password!(plain)
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secure_equals?(test_hash, hashed_password)
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end
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# constant-time comparison algorithm to prevent timing attacks
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def secure_equals?(a, b)
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return false if a.blank? || b.blank? || a.bytesize != b.bytesize
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l = a.unpack "C#{a.bytesize}"
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res = 0
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b.each_byte do |byte| res |= byte ^ l.shift end
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res == 0
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end
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##
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# Override the base method to disallow new passwords being generated this way.
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def salt_and_hash_password!
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raise ArgumentError, 'Do not use UserPassword::SHA1 for new passwords!'
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end
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##
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# Hash a plaintext password with a given salt
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# The hashed password has following form: SHA1(salt + SHA1(password))
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def derive_password!(input)
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hashfn("#{salt}#{hashfn(input)}")
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end
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def hashfn(input)
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Digest::SHA1.hexdigest(input)
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end
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end
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