2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2014-2019 Netflix Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/refcount.h>
34 #include <sys/_task.h>
37 struct tls_record_layer {
43 } __attribute__ ((packed));
45 #define TLS_MAX_MSG_SIZE_V10_2 16384
46 #define TLS_MAX_PARAM_SIZE 1024 /* Max key/mac/iv in sockopt */
47 #define TLS_AEAD_GCM_LEN 4
48 #define TLS_1_3_GCM_IV_LEN 12
49 #define TLS_CHACHA20_IV_LEN 12
50 #define TLS_CBC_IMPLICIT_IV_LEN 16
52 /* Type values for the record layer */
53 #define TLS_RLTYPE_ALERT 21
54 #define TLS_RLTYPE_HANDSHAKE 22
55 #define TLS_RLTYPE_APP 23
58 * Nonce for GCM for TLS 1.2 per RFC 5288.
60 struct tls_nonce_data {
61 uint8_t fixed[TLS_AEAD_GCM_LEN];
66 * AEAD additional data format for TLS 1.2 per RFC 5246.
68 struct tls_aead_data {
69 uint64_t seq; /* In network order */
77 * AEAD additional data format for TLS 1.3 per RFC 8446.
79 struct tls_aead_data_13 {
87 * Stream Cipher MAC additional data input. This does not match the
88 * exact data on the wire (the sequence number is not placed on the
89 * wire, and any explicit IV after the record header is not covered by
100 #define TLS_MAJOR_VER_ONE 3
101 #define TLS_MINOR_VER_ZERO 1 /* 3, 1 */
102 #define TLS_MINOR_VER_ONE 2 /* 3, 2 */
103 #define TLS_MINOR_VER_TWO 3 /* 3, 3 */
104 #define TLS_MINOR_VER_THREE 4 /* 3, 4 */
106 /* For TCP_TXTLS_ENABLE and TCP_RXTLS_ENABLE. */
108 struct tls_enable_v0 {
109 const uint8_t *cipher_key;
110 const uint8_t *iv; /* Implicit IV. */
111 const uint8_t *auth_key;
112 int cipher_algorithm; /* e.g. CRYPTO_AES_CBC */
115 int auth_algorithm; /* e.g. CRYPTO_SHA2_256_HMAC */
124 const uint8_t *cipher_key;
125 const uint8_t *iv; /* Implicit IV. */
126 const uint8_t *auth_key;
127 int cipher_algorithm; /* e.g. CRYPTO_AES_CBC */
130 int auth_algorithm; /* e.g. CRYPTO_SHA2_256_HMAC */
138 /* Structure for TLS_GET_RECORD. */
139 struct tls_get_record {
140 /* TLS record header. */
149 struct tls_session_params {
152 uint8_t iv[TLS_CBC_IMPLICIT_IV_LEN];
153 int cipher_algorithm;
155 uint16_t cipher_key_len;
157 uint16_t auth_key_len;
158 uint16_t max_frame_len;
167 /* Used in APIs to request RX vs TX sessions. */
172 struct ktls_ocf_encrypt_state;
173 struct ktls_ocf_session;
180 struct ktls_session {
181 struct ktls_ocf_session *ocf_session;
182 struct m_snd_tag *snd_tag;
183 struct tls_session_params params;
185 volatile u_int refcount;
188 struct task reset_tag_task;
189 struct task disable_ifnet_task;
191 struct inpcb *inp; /* Used by transmit tasks. */
192 struct socket *so; /* Used by receive task. */
194 struct ifnet *rx_ifp;
197 bool disable_ifnet_pending;
199 bool sequential_records;
201 /* Only used for TLS 1.0. */
203 STAILQ_HEAD(, mbuf) pending_records;
204 } __aligned(CACHE_LINE_SIZE);
206 extern unsigned int ktls_ifnet_max_rexmit_pct;
209 KTLS_MBUF_CRYPTO_ST_MIXED = 0,
210 KTLS_MBUF_CRYPTO_ST_ENCRYPTED = 1,
211 KTLS_MBUF_CRYPTO_ST_DECRYPTED = -1,
212 } ktls_mbuf_crypto_st_t;
214 void ktls_check_rx(struct sockbuf *sb);
215 ktls_mbuf_crypto_st_t ktls_mbuf_crypto_state(struct mbuf *mb, int offset, int len);
216 void ktls_disable_ifnet(void *arg);
217 int ktls_enable_rx(struct socket *so, struct tls_enable *en);
218 int ktls_enable_tx(struct socket *so, struct tls_enable *en);
219 void ktls_destroy(struct ktls_session *tls);
220 void ktls_frame(struct mbuf *m, struct ktls_session *tls, int *enqueue_cnt,
221 uint8_t record_type);
222 bool ktls_permit_empty_frames(struct ktls_session *tls);
223 void ktls_seq(struct sockbuf *sb, struct mbuf *m);
224 void ktls_enqueue(struct mbuf *m, struct socket *so, int page_count);
225 void ktls_enqueue_to_free(struct mbuf *m);
226 int ktls_get_rx_mode(struct socket *so, int *modep);
227 int ktls_set_tx_mode(struct socket *so, int mode);
228 int ktls_get_tx_mode(struct socket *so, int *modep);
229 int ktls_get_rx_sequence(struct inpcb *inp, uint32_t *tcpseq, uint64_t *tlsseq);
230 void ktls_input_ifp_mismatch(struct sockbuf *sb, struct ifnet *ifp);
231 int ktls_output_eagain(struct inpcb *inp, struct ktls_session *tls);
233 int ktls_modify_txrtlmt(struct ktls_session *tls, uint64_t max_pacing_rate);
235 bool ktls_pending_rx_info(struct sockbuf *sb, uint64_t *seqnop, size_t *residp);
237 static inline struct ktls_session *
238 ktls_hold(struct ktls_session *tls)
242 refcount_acquire(&tls->refcount);
247 ktls_free(struct ktls_session *tls)
250 if (refcount_release(&tls->refcount))
254 #endif /* !_KERNEL */
255 #endif /* !_SYS_KTLS_H_ */