2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2014-2019 Netflix Inc.
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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_CBC_IMPLICIT_IV_LEN 16
51 /* Type values for the record layer */
52 #define TLS_RLTYPE_APP 23
55 * Nonce for GCM for TLS 1.2 per RFC 5288.
57 struct tls_nonce_data {
58 uint8_t fixed[TLS_AEAD_GCM_LEN];
63 * AEAD additional data format for TLS 1.2 per RFC 5246.
65 struct tls_aead_data {
66 uint64_t seq; /* In network order */
74 * AEAD additional data format for TLS 1.3 per RFC 8446.
76 struct tls_aead_data_13 {
84 * Stream Cipher MAC additional data input. This does not match the
85 * exact data on the wire (the sequence number is not placed on the
86 * wire, and any explicit IV after the record header is not covered by
97 #define TLS_MAJOR_VER_ONE 3
98 #define TLS_MINOR_VER_ZERO 1 /* 3, 1 */
99 #define TLS_MINOR_VER_ONE 2 /* 3, 2 */
100 #define TLS_MINOR_VER_TWO 3 /* 3, 3 */
101 #define TLS_MINOR_VER_THREE 4 /* 3, 4 */
103 /* For TCP_TXTLS_ENABLE and TCP_RXTLS_ENABLE. */
105 struct tls_enable_v0 {
106 const uint8_t *cipher_key;
107 const uint8_t *iv; /* Implicit IV. */
108 const uint8_t *auth_key;
109 int cipher_algorithm; /* e.g. CRYPTO_AES_CBC */
112 int auth_algorithm; /* e.g. CRYPTO_SHA2_256_HMAC */
121 const uint8_t *cipher_key;
122 const uint8_t *iv; /* Implicit IV. */
123 const uint8_t *auth_key;
124 int cipher_algorithm; /* e.g. CRYPTO_AES_CBC */
127 int auth_algorithm; /* e.g. CRYPTO_SHA2_256_HMAC */
135 /* Structure for TLS_GET_RECORD. */
136 struct tls_get_record {
137 /* TLS record header. */
146 struct tls_session_params {
149 uint8_t iv[TLS_CBC_IMPLICIT_IV_LEN];
150 int cipher_algorithm;
152 uint16_t cipher_key_len;
154 uint16_t auth_key_len;
155 uint16_t max_frame_len;
164 /* Used in APIs to request RX vs TX sessions. */
168 #define KTLS_API_VERSION 7
177 struct ktls_crypto_backend {
178 LIST_ENTRY(ktls_crypto_backend) next;
179 int (*try)(struct socket *so, struct ktls_session *tls, int direction);
186 struct ktls_session {
188 int (*sw_encrypt)(struct ktls_session *tls,
189 const struct tls_record_layer *hdr, uint8_t *trailer,
190 struct iovec *src, struct iovec *dst, int iovcnt,
191 uint64_t seqno, uint8_t record_type);
192 int (*sw_decrypt)(struct ktls_session *tls,
193 const struct tls_record_layer *hdr, struct mbuf *m,
194 uint64_t seqno, int *trailer_len);
198 struct m_snd_tag *snd_tag;
200 struct ktls_crypto_backend *be;
201 void (*free)(struct ktls_session *tls);
202 struct tls_session_params params;
204 volatile u_int refcount;
207 struct task reset_tag_task;
210 } __aligned(CACHE_LINE_SIZE);
212 void ktls_check_rx(struct sockbuf *sb);
213 int ktls_crypto_backend_register(struct ktls_crypto_backend *be);
214 int ktls_crypto_backend_deregister(struct ktls_crypto_backend *be);
215 int ktls_enable_rx(struct socket *so, struct tls_enable *en);
216 int ktls_enable_tx(struct socket *so, struct tls_enable *en);
217 void ktls_destroy(struct ktls_session *tls);
218 void ktls_frame(struct mbuf *m, struct ktls_session *tls, int *enqueue_cnt,
219 uint8_t record_type);
220 void ktls_seq(struct sockbuf *sb, struct mbuf *m);
221 void ktls_enqueue(struct mbuf *m, struct socket *so, int page_count);
222 void ktls_enqueue_to_free(struct mbuf *m);
223 int ktls_get_rx_mode(struct socket *so);
224 int ktls_set_tx_mode(struct socket *so, int mode);
225 int ktls_get_tx_mode(struct socket *so);
226 int ktls_output_eagain(struct inpcb *inp, struct ktls_session *tls);
228 int ktls_modify_txrtlmt(struct ktls_session *tls, uint64_t max_pacing_rate);
231 static inline struct ktls_session *
232 ktls_hold(struct ktls_session *tls)
236 refcount_acquire(&tls->refcount);
241 ktls_free(struct ktls_session *tls)
244 if (refcount_release(&tls->refcount))
248 #endif /* !_KERNEL */
249 #endif /* !_SYS_KTLS_H_ */