lib/mongo/crypt/kms/credentials.rb
# frozen_string_literal: true
# rubocop:todo all
# Copyright (C) 2019-2021 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 Crypt
module KMS
# KMS Credentials object contains credentials for using KMS providers.
#
# @api private
class Credentials
# @return [ Credentials::AWS | nil ] AWS KMS credentials.
attr_reader :aws
# @return [ Credentials::Azure | nil ] Azure KMS credentials.
attr_reader :azure
# @return [ Credentials::GCP | nil ] GCP KMS credentials.
attr_reader :gcp
# @return [ Credentials::KMIP | nil ] KMIP KMS credentials.
attr_reader :kmip
# @return [ Credentials::Local | nil ] Local KMS credentials.
attr_reader :local
# Creates a KMS credentials object form a parameters hash.
#
# @param [ Hash ] kms_providers A hash that contains credential for
# KMS providers. The hash should have KMS provider names as keys,
# and required parameters for every provider as values.
# Required parameters for KMS providers are described in corresponding
# classes inside Mongo::Crypt::KMS module.
#
# @note There may be more than one KMS provider specified.
#
# @raise [ ArgumentError ] If required options are missing or incorrectly
# formatted.
def initialize(kms_providers)
if kms_providers.nil?
raise ArgumentError.new("KMS providers options must not be nil")
end
if kms_providers.key?(:aws)
@aws = AWS::Credentials.new(kms_providers[:aws])
end
if kms_providers.key?(:azure)
@azure = Azure::Credentials.new(kms_providers[:azure])
end
if kms_providers.key?(:gcp)
@gcp = GCP::Credentials.new(kms_providers[:gcp])
end
if kms_providers.key?(:kmip)
@kmip = KMIP::Credentials.new(kms_providers[:kmip])
end
if kms_providers.key?(:local)
@local = Local::Credentials.new(kms_providers[:local])
end
if @aws.nil? && @azure.nil? && @gcp.nil? && @kmip.nil? && @local.nil?
raise ArgumentError.new(
"KMS providers options must have one of the following keys: " +
":aws, :azure, :gcp, :kmip, :local"
)
end
end
# Convert credentials object to a BSON document in libmongocrypt format.
#
# @return [ BSON::Document ] Credentials as BSON document.
def to_document
BSON::Document.new.tap do |bson|
bson[:aws] = @aws.to_document if @aws
bson[:azure] = @azure.to_document if @azure
bson[:gcp] = @gcp.to_document if @gcp
bson[:kmip] = @kmip.to_document if @kmip
bson[:local] = @local.to_document if @local
end
end
end
end
end
end