/* * Copyright (c) 2020 Doc.ai and/or its affiliates. * 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. */ #ifndef __included_wg_messages_h__ #define __included_wg_messages_h__ #include <stdint.h> #include <wireguard/wireguard_noise.h> #include <wireguard/wireguard_cookie.h> #define WG_TICK 0.01 /**< WG tick period (s) */ #define WHZ (u32) (1/WG_TICK) /**< WG tick frequency */ #define NOISE_KEY_LEN_BASE64 ((((NOISE_PUBLIC_KEY_LEN) + 2) / 3) * 4 + 1) #define noise_encrypted_len(plain_len) ((plain_len) + NOISE_AUTHTAG_LEN) enum limits { REKEY_TIMEOUT = 5, REKEY_TIMEOUT_JITTER = WHZ / 3, KEEPALIVE_TIMEOUT = 10, MAX_TIMER_HANDSHAKES = 90 / REKEY_TIMEOUT, MAX_PEERS = 1U << 20 }; #define foreach_wg_message_type \ _(INVALID, "Invalid") \ _(HANDSHAKE_INITIATION, "Handshake initiation") \ _(HANDSHAKE_RESPONSE, "Handshake response") \ _(HANDSHAKE_COOKIE, "Handshake cookie") \ _(DATA, "Data") \ typedef enum message_type { #define _(v,s) MESSAGE_##v, foreach_wg_message_type #undef _ } message_type_t; typedef struct message_header { message_type_t type; } message_header_t; typedef struct message_handshake_initiation { message_header_t header; u32 sender_index; u8 unencrypted_ephemeral[NOISE_PUBLIC_KEY_LEN]; u8 encrypted_static[noise_encrypted_len (NOISE_PUBLIC_KEY_LEN)]; u8 encrypted_timestamp[noise_encrypted_len (NOISE_TIMESTAMP_LEN)]; message_macs_t macs; } message_handshake_initiation_t; typedef struct message_handshake_response { message_header_t header; u32 sender_index; u32 receiver_index; u8 unencrypted_ephemeral[NOISE_PUBLIC_KEY_LEN]; u8 encrypted_nothing[noise_encrypted_len (0)]; message_macs_t macs; } message_handshake_response_t; typedef struct message_handshake_cookie { message_header_t header; u32 receiver_index; u8 nonce[COOKIE_NONCE_SIZE]; u8 encrypted_cookie[noise_encrypted_len (COOKIE_MAC_SIZE)]; } message_handshake_cookie_t; typedef struct message_data { message_header_t header; u32 receiver_index; u64 counter; u8 encrypted_data[]; } message_data_t; #define message_data_len(plain_len) \ (noise_encrypted_len(plain_len) + sizeof(message_data_t)) #endif /* __included_wg_messages_h__ */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */