2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2014-2019 Netflix Inc.
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7 * modification, are permitted provided that the following conditions
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13 * documentation and/or other materials provided with the distribution.
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31 #include <sys/refcount.h>
32 #include <sys/_task.h>
35 struct tls_record_layer {
41 } __attribute__ ((packed));
43 #define TLS_MAX_MSG_SIZE_V10_2 16384
44 #define TLS_MAX_PARAM_SIZE 1024 /* Max key/mac/iv in sockopt */
45 #define TLS_AEAD_GCM_LEN 4
46 #define TLS_1_3_GCM_IV_LEN 12
47 #define TLS_CHACHA20_IV_LEN 12
48 #define TLS_CBC_IMPLICIT_IV_LEN 16
50 /* Type values for the record layer */
51 #define TLS_RLTYPE_ALERT 21
52 #define TLS_RLTYPE_HANDSHAKE 22
53 #define TLS_RLTYPE_APP 23
56 * Nonce for GCM for TLS 1.2 per RFC 5288.
58 struct tls_nonce_data {
59 uint8_t fixed[TLS_AEAD_GCM_LEN];
64 * AEAD additional data format for TLS 1.2 per RFC 5246.
66 struct tls_aead_data {
67 uint64_t seq; /* In network order */
75 * AEAD additional data format for TLS 1.3 per RFC 8446.
77 struct tls_aead_data_13 {
85 * Stream Cipher MAC additional data input. This does not match the
86 * exact data on the wire (the sequence number is not placed on the
87 * wire, and any explicit IV after the record header is not covered by
98 #define TLS_MAJOR_VER_ONE 3
99 #define TLS_MINOR_VER_ZERO 1 /* 3, 1 */
100 #define TLS_MINOR_VER_ONE 2 /* 3, 2 */
101 #define TLS_MINOR_VER_TWO 3 /* 3, 3 */
102 #define TLS_MINOR_VER_THREE 4 /* 3, 4 */
104 /* For TCP_TXTLS_ENABLE and TCP_RXTLS_ENABLE. */
106 struct tls_enable_v0 {
107 const uint8_t *cipher_key;
108 const uint8_t *iv; /* Implicit IV. */
109 const uint8_t *auth_key;
110 int cipher_algorithm; /* e.g. CRYPTO_AES_CBC */
113 int auth_algorithm; /* e.g. CRYPTO_SHA2_256_HMAC */
122 const uint8_t *cipher_key;
123 const uint8_t *iv; /* Implicit IV. */
124 const uint8_t *auth_key;
125 int cipher_algorithm; /* e.g. CRYPTO_AES_CBC */
128 int auth_algorithm; /* e.g. CRYPTO_SHA2_256_HMAC */
136 /* Structure for TLS_GET_RECORD. */
137 struct tls_get_record {
138 /* TLS record header. */
147 struct tls_session_params {
150 uint8_t iv[TLS_CBC_IMPLICIT_IV_LEN];
151 int cipher_algorithm;
153 uint16_t cipher_key_len;
155 uint16_t auth_key_len;
156 uint16_t max_frame_len;
165 /* Used in APIs to request RX vs TX sessions. */
170 struct ktls_ocf_encrypt_state;
171 struct ktls_ocf_session;
178 struct ktls_session {
179 struct ktls_ocf_session *ocf_session;
180 struct m_snd_tag *snd_tag;
181 struct tls_session_params params;
183 volatile u_int refcount;
186 struct task reset_tag_task;
187 struct task disable_ifnet_task;
189 struct inpcb *inp; /* Used by transmit tasks. */
190 struct socket *so; /* Used by receive task. */
192 struct ifnet *rx_ifp;
197 bool sequential_records;
199 /* Only used for TLS 1.0. */
201 STAILQ_HEAD(, mbuf) pending_records;
203 /* Used to destroy any kTLS session */
204 struct task destroy_task;
205 } __aligned(CACHE_LINE_SIZE);
207 extern unsigned int ktls_ifnet_max_rexmit_pct;
210 KTLS_MBUF_CRYPTO_ST_MIXED = 0,
211 KTLS_MBUF_CRYPTO_ST_ENCRYPTED = 1,
212 KTLS_MBUF_CRYPTO_ST_DECRYPTED = -1,
213 } ktls_mbuf_crypto_st_t;
215 void ktls_check_rx(struct sockbuf *sb);
216 ktls_mbuf_crypto_st_t ktls_mbuf_crypto_state(struct mbuf *mb, int offset, int len);
217 void ktls_disable_ifnet(void *arg);
218 int ktls_enable_rx(struct socket *so, struct tls_enable *en);
219 int ktls_enable_tx(struct socket *so, struct tls_enable *en);
220 void ktls_destroy(struct ktls_session *tls);
221 void ktls_frame(struct mbuf *m, struct ktls_session *tls, int *enqueue_cnt,
222 uint8_t record_type);
223 bool ktls_permit_empty_frames(struct ktls_session *tls);
224 void ktls_seq(struct sockbuf *sb, struct mbuf *m);
225 void ktls_enqueue(struct mbuf *m, struct socket *so, int page_count);
226 void ktls_enqueue_to_free(struct mbuf *m);
227 int ktls_get_rx_mode(struct socket *so, int *modep);
228 int ktls_set_tx_mode(struct socket *so, int mode);
229 int ktls_get_tx_mode(struct socket *so, int *modep);
230 int ktls_get_rx_sequence(struct inpcb *inp, uint32_t *tcpseq, uint64_t *tlsseq);
231 void ktls_input_ifp_mismatch(struct sockbuf *sb, struct ifnet *ifp);
232 int ktls_output_eagain(struct inpcb *inp, struct ktls_session *tls);
234 int ktls_modify_txrtlmt(struct ktls_session *tls, uint64_t max_pacing_rate);
236 bool ktls_pending_rx_info(struct sockbuf *sb, uint64_t *seqnop, size_t *residp);
238 static inline struct ktls_session *
239 ktls_hold(struct ktls_session *tls)
243 refcount_acquire(&tls->refcount);
248 ktls_free(struct ktls_session *tls)
251 if (refcount_release(&tls->refcount))
255 #endif /* !_KERNEL */
256 #endif /* !_SYS_KTLS_H_ */