wg_cookie.h

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    1 /* SPDX-License-Identifier: ISC
    2  *
    3  * Copyright (C) 2015-2021 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
    4  * Copyright (C) 2019-2021 Matt Dunwoodie <ncon@noconroy.net>
    5  */
    6 
    7 #ifndef __COOKIE_H__
    8 #define __COOKIE_H__
    9 
   10 #include "crypto.h"
   11 
   12 #define COOKIE_MAC_SIZE         16
   13 #define COOKIE_KEY_SIZE         32
   14 #define COOKIE_NONCE_SIZE       XCHACHA20POLY1305_NONCE_SIZE
   15 #define COOKIE_COOKIE_SIZE      16
   16 #define COOKIE_SECRET_SIZE      32
   17 #define COOKIE_INPUT_SIZE       32
   18 #define COOKIE_ENCRYPTED_SIZE   (COOKIE_COOKIE_SIZE + COOKIE_MAC_SIZE)
   19 
   20 struct vnet;
   21 
   22 struct cookie_macs {
   23         uint8_t mac1[COOKIE_MAC_SIZE];
   24         uint8_t mac2[COOKIE_MAC_SIZE];
   25 };
   26 
   27 struct cookie_maker {
   28         uint8_t         cm_mac1_key[COOKIE_KEY_SIZE];
   29         uint8_t         cm_cookie_key[COOKIE_KEY_SIZE];
   30 
   31         struct rwlock   cm_lock;
   32         bool            cm_cookie_valid;
   33         uint8_t         cm_cookie[COOKIE_COOKIE_SIZE];
   34         sbintime_t      cm_cookie_birthdate;    /* sbinuptime */
   35         bool            cm_mac1_sent;
   36         uint8_t         cm_mac1_last[COOKIE_MAC_SIZE];
   37 };
   38 
   39 struct cookie_checker {
   40         struct rwlock   cc_key_lock;
   41         uint8_t         cc_mac1_key[COOKIE_KEY_SIZE];
   42         uint8_t         cc_cookie_key[COOKIE_KEY_SIZE];
   43 
   44         struct mtx      cc_secret_mtx;
   45         sbintime_t      cc_secret_birthdate;    /* sbinuptime */
   46         uint8_t         cc_secret[COOKIE_SECRET_SIZE];
   47 };
   48 
   49 int     cookie_init(void);
   50 void    cookie_deinit(void);
   51 void    cookie_checker_init(struct cookie_checker *);
   52 void    cookie_checker_free(struct cookie_checker *);
   53 void    cookie_checker_update(struct cookie_checker *,
   54             const uint8_t[COOKIE_INPUT_SIZE]);
   55 void    cookie_checker_create_payload(struct cookie_checker *,
   56             struct cookie_macs *cm, uint8_t[COOKIE_NONCE_SIZE],
   57             uint8_t [COOKIE_ENCRYPTED_SIZE], struct sockaddr *);
   58 void    cookie_maker_init(struct cookie_maker *, const uint8_t[COOKIE_INPUT_SIZE]);
   59 void    cookie_maker_free(struct cookie_maker *);
   60 int     cookie_maker_consume_payload(struct cookie_maker *,
   61             uint8_t[COOKIE_NONCE_SIZE], uint8_t[COOKIE_ENCRYPTED_SIZE]);
   62 void    cookie_maker_mac(struct cookie_maker *, struct cookie_macs *,
   63             void *, size_t);
   64 int     cookie_checker_validate_macs(struct cookie_checker *,
   65             struct cookie_macs *, void *, size_t, bool, struct sockaddr *,
   66             struct vnet *);
   67 
   68 #ifdef SELFTESTS
   69 bool    cookie_selftest(void);
   70 #endif /* SELFTESTS */
   71 
   72 #endif /* __COOKIE_H__ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/wg/wg_cookie.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/wg/wg_cookie.h