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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
syntax = "proto2";
option optimize_for = LITE_RUNTIME;
package gcm;
// Stores a public/private key-pair.
// Next tag: 5
message KeyPair {
// The type of key used for key agreement. Currently only the ECDH key
// agreement scheme is supported, using NIST P-256.
enum KeyType {
ECDH_P256 = 0;
}
required KeyType type = 1;
// The private key matching the size requirements of |type|.
optional bytes private_key = 2;
reserved 3; // public_key_x509, now deleted.
// The public key as an uncompressed EC point according to SEC 2.3.3.
optional bytes public_key = 4;
}
// Stores a vector of public/private key-pairs associated with an app id and
// optionally the authorized entity of an instance id token.
//
// In the current implementation, each (app_id, authorized_entity) pair will
// have a single encryption key-pair associated with it at most. The message
// allows for multiple key pairs in case we need to force-cycle all keys,
// allowing the old keys to remain valid for a period of time enabling the web
// app to update.
//
// Next tag: 6
message EncryptionData {
// The app id to whom this encryption data belongs.
required string app_id = 1;
// The sender id of the instance id token that this encryption data belongs
// to. Must not be empty. Must be omitted for non-InstanceID registrations.
optional string authorized_entity = 4;
// DEPRECATED: The actual public/private key-pairs.
repeated KeyPair keys = 2;
// P-256 private key stored as a PKCS #8 PrivateKeyInfo block.
optional string private_key = 5;
// The authentication secret associated with the subscription. Must be a
// cryptographically secure number of at least 12 bytes.
optional bytes auth_secret = 3;
}
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