53 lines
1.3 KiB
Ruby
53 lines
1.3 KiB
Ruby
# frozen_string_literal: true
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#
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# Copyright (C) 2019 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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ScryptProvider = Struct.new(:cost) do
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def encrypt(*tokens)
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SCrypt::Password.create(
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join_tokens(tokens),
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cost:
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)
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end
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# Does the hash match the tokens? Uses the same tokens that were used to encrypt.
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def matches?(hash, *tokens)
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hash = new_from_hash(hash)
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return false if hash.blank?
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hash == join_tokens(tokens)
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end
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def cost_matches?(hash)
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hash.starts_with?(cost)
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end
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private
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def join_tokens(tokens)
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tokens.flatten.join
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end
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def new_from_hash(hash)
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SCrypt::Password.new(hash)
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rescue SCrypt::Errors::InvalidHash
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nil
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end
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end
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