# Copyright 2018 New Vector Ltd
#
# 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.
openapi: 3.1.0
info:
  title: Matrix Federation Key Exchange API
  version: 1.0.0
paths:
  /server:
    get:
      summary: Get the homeserver's public key(s)
      description: |-
        Gets the homeserver's published signing keys.
        The homeserver may have any number of active keys and may have a
        number of old keys.

        Intermediate notary servers should cache a response for half of its
        lifetime to avoid serving a stale response. Originating servers should
        avoid returning responses that expire in less than an hour to avoid
        repeated requests for a certificate that is about to expire. Requesting
        servers should limit how frequently they query for certificates to
        avoid flooding a server with requests.

        If the server fails to respond to this request, intermediate notary
        servers should continue to return the last response they received
        from the server so that the signatures of old events can still be
        checked.
      operationId: getServerKey
      responses:
        "200":
          description: The homeserver's keys
          content:
            application/json:
              schema:
                $ref: definitions/keys.yaml
servers:
  - url: "{protocol}://{hostname}{basePath}"
    variables:
      protocol:
        enum:
          - http
          - https
        default: https
      hostname:
        default: localhost:8448
      basePath:
        default: /_matrix/key/v2