77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* SPDX-License-Identifier: ISC
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*
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* Copyright (C) 2015-2021 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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* Copyright (C) 2019-2021 Matt Dunwoodie <ncon@noconroy.net>
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*/
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#ifndef __COOKIE_H__
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#define __COOKIE_H__
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/rwlock.h>
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#include <sys/queue.h>
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#include <netinet/in.h>
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#include <crypto/siphash/siphash.h>
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#include "crypto.h"
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#define COOKIE_MAC_SIZE 16
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#define COOKIE_KEY_SIZE 32
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#define COOKIE_NONCE_SIZE XCHACHA20POLY1305_NONCE_SIZE
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#define COOKIE_COOKIE_SIZE 16
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#define COOKIE_SECRET_SIZE 32
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#define COOKIE_INPUT_SIZE 32
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#define COOKIE_ENCRYPTED_SIZE (COOKIE_COOKIE_SIZE + COOKIE_MAC_SIZE)
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struct cookie_macs {
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uint8_t mac1[COOKIE_MAC_SIZE];
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uint8_t mac2[COOKIE_MAC_SIZE];
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};
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struct cookie_maker {
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uint8_t cm_mac1_key[COOKIE_KEY_SIZE];
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uint8_t cm_cookie_key[COOKIE_KEY_SIZE];
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struct rwlock cm_lock;
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bool cm_cookie_valid;
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uint8_t cm_cookie[COOKIE_COOKIE_SIZE];
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sbintime_t cm_cookie_birthdate; /* sbinuptime */
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bool cm_mac1_sent;
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uint8_t cm_mac1_last[COOKIE_MAC_SIZE];
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};
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struct cookie_checker {
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struct rwlock cc_key_lock;
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uint8_t cc_mac1_key[COOKIE_KEY_SIZE];
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uint8_t cc_cookie_key[COOKIE_KEY_SIZE];
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struct mtx cc_secret_mtx;
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sbintime_t cc_secret_birthdate; /* sbinuptime */
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uint8_t cc_secret[COOKIE_SECRET_SIZE];
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};
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int cookie_init(void);
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void cookie_deinit(void);
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void cookie_checker_init(struct cookie_checker *);
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void cookie_checker_free(struct cookie_checker *);
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void cookie_checker_update(struct cookie_checker *,
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const uint8_t[COOKIE_INPUT_SIZE]);
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void cookie_checker_create_payload(struct cookie_checker *,
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struct cookie_macs *cm, uint8_t[COOKIE_NONCE_SIZE],
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uint8_t [COOKIE_ENCRYPTED_SIZE], struct sockaddr *);
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void cookie_maker_init(struct cookie_maker *, const uint8_t[COOKIE_INPUT_SIZE]);
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void cookie_maker_free(struct cookie_maker *);
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int cookie_maker_consume_payload(struct cookie_maker *,
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uint8_t[COOKIE_NONCE_SIZE], uint8_t[COOKIE_ENCRYPTED_SIZE]);
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void cookie_maker_mac(struct cookie_maker *, struct cookie_macs *,
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void *, size_t);
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int cookie_checker_validate_macs(struct cookie_checker *,
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struct cookie_macs *, void *, size_t, bool, struct sockaddr *,
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struct vnet *);
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#ifdef SELFTESTS
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bool cookie_selftest(void);
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#endif /* SELFTESTS */
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#endif /* __COOKIE_H__ */
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