queer.af's fork of mastodon
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# frozen_string_literal: true
class Keys::ClaimService < BaseService
HEADERS = { 'Content-Type' => 'application/activity+json' }.freeze
class Result < ActiveModelSerializers::Model
attributes :account, :device_id, :key_id,
:key, :signature
def initialize(account, device_id, key_attributes = {})
super(
account: account,
device_id: device_id,
key_id: key_attributes[:key_id],
key: key_attributes[:key],
signature: key_attributes[:signature],
)
end
end
def call(source_account, target_account_id, device_id)
@source_account = source_account
@target_account = Account.find(target_account_id)
@device_id = device_id
if @target_account.local?
claim_local_key!
else
claim_remote_key!
end
rescue ActiveRecord::RecordNotFound
nil
end
private
def claim_local_key!
device = @target_account.devices.find_by(device_id: @device_id)
key = nil
ApplicationRecord.transaction do
key = device.one_time_keys.order(Arel.sql('random()')).first!
key.destroy!
end
@result = Result.new(@target_account, @device_id, key)
end
def claim_remote_key!
query_result = QueryService.new.call(@target_account)
device = query_result.find(@device_id)
return unless device.present? && device.valid_claim_url?
json = fetch_resource_with_post(device.claim_url)
return unless json.present? && json['publicKeyBase64'].present?
@result = Result.new(@target_account, @device_id, key_id: json['id'], key: json['publicKeyBase64'], signature: json.dig('signature', 'signatureValue'))
rescue HTTP::Error, OpenSSL::SSL::SSLError, Mastodon::Error => e
Rails.logger.debug "Claiming one-time key for #{@target_account.acct}:#{@device_id} failed: #{e}"
nil
end
def fetch_resource_with_post(uri)
build_post_request(uri).perform do |response|
raise Mastodon::UnexpectedResponseError, response unless response_successful?(response) || response_error_unsalvageable?(response)
body_to_json(response.body_with_limit) if response.code == 200
end
end
def build_post_request(uri)
Request.new(:post, uri).tap do |request|
request.on_behalf_of(@source_account, :uri)
request.add_headers(HEADERS)
end
end
end