syntax = "proto2";

option optimize_for = LITE_RUNTIME;

package cryptohome.cryptorecovery;

// !!! DO NOT MODIFY !!!
// The message structs below are exchanged with the server and must be synced
// with the server/HSM implementation.

// Request for the current epoch
message CryptoRecoveryEpochRequest {
  optional int32 protocol_version = 1;  // protocol version
}

// Epoch public key response
message CryptoRecoveryEpochResponse {
  optional int32 protocol_version = 1;  // protocol version
  optional bytes epoch_pub_key = 2;     // public key of the current epoch
  optional bytes epoch_meta_data =
      3;  // cbor encoded metadata of current epoch. clients can also treat this
          // as an opaque blob.
}

// Request for a cryptohome recovery
message CryptoRecoveryRpcRequest {
  optional int32 protocol_version = 1;            // protocol version
  optional bytes cbor_cryptorecoveryrequest = 2;  // cbor encoded request
}

// Result of a cryptohome recovery
message CryptoRecoveryRpcResponse {
  optional int32 protocol_version = 1;             // protocol version
  optional bytes cbor_cryptorecoveryresponse = 2;  // cbor encoded response
}