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# frozen_string_literal: true
# rubocop:todo all
# Copyright (C) 2020 MongoDB Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module Mongo
module Auth
class Scram256
# Defines behavior around a single SCRAM-SHA-256 conversation between
# the client and server.
#
# @api private
class Conversation < ScramConversationBase
private
# HI algorithm implementation.
#
# @api private
#
# @see http://tools.ietf.org/html/rfc5802#section-2.2
#
# @since 2.0.0
def hi(data)
OpenSSL::PKCS5.pbkdf2_hmac(
data,
salt,
iterations,
digest.size,
digest,
)
end
# Salted password algorithm implementation.
#
# @api private
#
# @see http://tools.ietf.org/html/rfc5802#section-3
#
# @since 2.0.0
def salted_password
@salted_password ||= CredentialCache.cache(cache_key(:salted_password)) do
hi(user.sasl_prepped_password)
end
end
def digest
@digest ||= OpenSSL::Digest::SHA256.new.freeze
end
end
end
end
end
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