158790314SJakub Kicinski /* 284c61fe1SJakub Kicinski * Copyright (c) 2016 Tom Herbert <tom@herbertland.com> 358790314SJakub Kicinski * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved. 458790314SJakub Kicinski * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved. 558790314SJakub Kicinski * 658790314SJakub Kicinski * This software is available to you under a choice of one of two 758790314SJakub Kicinski * licenses. You may choose to be licensed under the terms of the GNU 858790314SJakub Kicinski * General Public License (GPL) Version 2, available from the file 958790314SJakub Kicinski * COPYING in the main directory of this source tree, or the 1058790314SJakub Kicinski * OpenIB.org BSD license below: 1158790314SJakub Kicinski * 1258790314SJakub Kicinski * Redistribution and use in source and binary forms, with or 1358790314SJakub Kicinski * without modification, are permitted provided that the following 1458790314SJakub Kicinski * conditions are met: 1558790314SJakub Kicinski * 1658790314SJakub Kicinski * - Redistributions of source code must retain the above 1758790314SJakub Kicinski * copyright notice, this list of conditions and the following 1858790314SJakub Kicinski * disclaimer. 1958790314SJakub Kicinski * 2058790314SJakub Kicinski * - Redistributions in binary form must reproduce the above 2158790314SJakub Kicinski * copyright notice, this list of conditions and the following 2258790314SJakub Kicinski * disclaimer in the documentation and/or other materials 2358790314SJakub Kicinski * provided with the distribution. 2458790314SJakub Kicinski * 2558790314SJakub Kicinski * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 2658790314SJakub Kicinski * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 2758790314SJakub Kicinski * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 2858790314SJakub Kicinski * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 2958790314SJakub Kicinski * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 3058790314SJakub Kicinski * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 3158790314SJakub Kicinski * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 3258790314SJakub Kicinski * SOFTWARE. 3358790314SJakub Kicinski */ 3458790314SJakub Kicinski 3558790314SJakub Kicinski #ifndef _TLS_INT_H 3658790314SJakub Kicinski #define _TLS_INT_H 3758790314SJakub Kicinski 3858790314SJakub Kicinski #include <asm/byteorder.h> 3958790314SJakub Kicinski #include <linux/types.h> 4058790314SJakub Kicinski #include <linux/skmsg.h> 4158790314SJakub Kicinski #include <net/tls.h> 426a7eccefSChuck Lever #include <net/tls_prot.h> 4358790314SJakub Kicinski 44fd31f399SJakub Kicinski #define TLS_PAGE_ORDER (min_t(unsigned int, PAGE_ALLOC_COSTLY_ORDER, \ 45fd31f399SJakub Kicinski TLS_MAX_PAYLOAD_SIZE >> PAGE_SHIFT)) 46fd31f399SJakub Kicinski 4758790314SJakub Kicinski #define __TLS_INC_STATS(net, field) \ 4858790314SJakub Kicinski __SNMP_INC_STATS((net)->mib.tls_statistics, field) 4958790314SJakub Kicinski #define TLS_INC_STATS(net, field) \ 5058790314SJakub Kicinski SNMP_INC_STATS((net)->mib.tls_statistics, field) 5158790314SJakub Kicinski #define TLS_DEC_STATS(net, field) \ 5258790314SJakub Kicinski SNMP_DEC_STATS((net)->mib.tls_statistics, field) 5358790314SJakub Kicinski 548db44ab2SSabrina Dubroca struct tls_cipher_desc { 55176a3f50SSabrina Dubroca unsigned int nonce; 56fd0fc6fdSSabrina Dubroca unsigned int iv; 57fd0fc6fdSSabrina Dubroca unsigned int key; 58fd0fc6fdSSabrina Dubroca unsigned int salt; 59fd0fc6fdSSabrina Dubroca unsigned int tag; 60fd0fc6fdSSabrina Dubroca unsigned int rec_seq; 61176a3f50SSabrina Dubroca unsigned int iv_offset; 62176a3f50SSabrina Dubroca unsigned int key_offset; 63176a3f50SSabrina Dubroca unsigned int salt_offset; 64176a3f50SSabrina Dubroca unsigned int rec_seq_offset; 65176a3f50SSabrina Dubroca char *cipher_name; 66176a3f50SSabrina Dubroca bool offloadable; 67176a3f50SSabrina Dubroca size_t crypto_info; 68fd0fc6fdSSabrina Dubroca }; 69fd0fc6fdSSabrina Dubroca 70037303d6SSabrina Dubroca #define TLS_CIPHER_MIN TLS_CIPHER_AES_GCM_128 71037303d6SSabrina Dubroca #define TLS_CIPHER_MAX TLS_CIPHER_ARIA_GCM_256 728db44ab2SSabrina Dubroca extern const struct tls_cipher_desc tls_cipher_desc[TLS_CIPHER_MAX + 1 - TLS_CIPHER_MIN]; 73037303d6SSabrina Dubroca 748db44ab2SSabrina Dubroca static inline const struct tls_cipher_desc *get_cipher_desc(u16 cipher_type) 75037303d6SSabrina Dubroca { 76037303d6SSabrina Dubroca if (cipher_type < TLS_CIPHER_MIN || cipher_type > TLS_CIPHER_MAX) 77037303d6SSabrina Dubroca return NULL; 78037303d6SSabrina Dubroca 798db44ab2SSabrina Dubroca return &tls_cipher_desc[cipher_type - TLS_CIPHER_MIN]; 80037303d6SSabrina Dubroca } 81037303d6SSabrina Dubroca 82176a3f50SSabrina Dubroca static inline char *crypto_info_iv(struct tls_crypto_info *crypto_info, 83176a3f50SSabrina Dubroca const struct tls_cipher_desc *cipher_desc) 84176a3f50SSabrina Dubroca { 85176a3f50SSabrina Dubroca return (char *)crypto_info + cipher_desc->iv_offset; 86176a3f50SSabrina Dubroca } 87176a3f50SSabrina Dubroca 88176a3f50SSabrina Dubroca static inline char *crypto_info_key(struct tls_crypto_info *crypto_info, 89176a3f50SSabrina Dubroca const struct tls_cipher_desc *cipher_desc) 90176a3f50SSabrina Dubroca { 91176a3f50SSabrina Dubroca return (char *)crypto_info + cipher_desc->key_offset; 92176a3f50SSabrina Dubroca } 93176a3f50SSabrina Dubroca 94176a3f50SSabrina Dubroca static inline char *crypto_info_salt(struct tls_crypto_info *crypto_info, 95176a3f50SSabrina Dubroca const struct tls_cipher_desc *cipher_desc) 96176a3f50SSabrina Dubroca { 97176a3f50SSabrina Dubroca return (char *)crypto_info + cipher_desc->salt_offset; 98176a3f50SSabrina Dubroca } 99176a3f50SSabrina Dubroca 100176a3f50SSabrina Dubroca static inline char *crypto_info_rec_seq(struct tls_crypto_info *crypto_info, 101176a3f50SSabrina Dubroca const struct tls_cipher_desc *cipher_desc) 102176a3f50SSabrina Dubroca { 103176a3f50SSabrina Dubroca return (char *)crypto_info + cipher_desc->rec_seq_offset; 104176a3f50SSabrina Dubroca } 105176a3f50SSabrina Dubroca 106fd0fc6fdSSabrina Dubroca 10758790314SJakub Kicinski /* TLS records are maintained in 'struct tls_rec'. It stores the memory pages 10858790314SJakub Kicinski * allocated or mapped for each TLS record. After encryption, the records are 10958790314SJakub Kicinski * stores in a linked list. 11058790314SJakub Kicinski */ 11158790314SJakub Kicinski struct tls_rec { 11258790314SJakub Kicinski struct list_head list; 11358790314SJakub Kicinski int tx_ready; 11458790314SJakub Kicinski int tx_flags; 11558790314SJakub Kicinski 11658790314SJakub Kicinski struct sk_msg msg_plaintext; 11758790314SJakub Kicinski struct sk_msg msg_encrypted; 11858790314SJakub Kicinski 11958790314SJakub Kicinski /* AAD | msg_plaintext.sg.data | sg_tag */ 12058790314SJakub Kicinski struct scatterlist sg_aead_in[2]; 12158790314SJakub Kicinski /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */ 12258790314SJakub Kicinski struct scatterlist sg_aead_out[2]; 12358790314SJakub Kicinski 12458790314SJakub Kicinski char content_type; 12558790314SJakub Kicinski struct scatterlist sg_content_type; 12658790314SJakub Kicinski 1278d338c76SHerbert Xu struct sock *sk; 1288d338c76SHerbert Xu 12958790314SJakub Kicinski char aad_space[TLS_AAD_SPACE_SIZE]; 130bee6b7b3SSabrina Dubroca u8 iv_data[TLS_MAX_IV_SIZE]; 13158790314SJakub Kicinski struct aead_request aead_req; 13258790314SJakub Kicinski u8 aead_req_ctx[]; 13358790314SJakub Kicinski }; 13458790314SJakub Kicinski 13558790314SJakub Kicinski int __net_init tls_proc_init(struct net *net); 13658790314SJakub Kicinski void __net_exit tls_proc_fini(struct net *net); 13758790314SJakub Kicinski 13858790314SJakub Kicinski struct tls_context *tls_ctx_create(struct sock *sk); 13958790314SJakub Kicinski void tls_ctx_free(struct sock *sk, struct tls_context *ctx); 14058790314SJakub Kicinski void update_sk_prot(struct sock *sk, struct tls_context *ctx); 14158790314SJakub Kicinski 14258790314SJakub Kicinski int wait_on_pending_writer(struct sock *sk, long *timeo); 14358790314SJakub Kicinski void tls_err_abort(struct sock *sk, int err); 14458790314SJakub Kicinski 1451a074f76SSabrina Dubroca int init_prot_info(struct tls_prot_info *prot, 1461a074f76SSabrina Dubroca const struct tls_crypto_info *crypto_info, 1471a074f76SSabrina Dubroca const struct tls_cipher_desc *cipher_desc, 1481a074f76SSabrina Dubroca int mode); 149b6a30ec9SSabrina Dubroca int tls_set_sw_offload(struct sock *sk, int tx); 15058790314SJakub Kicinski void tls_update_rx_zc_capable(struct tls_context *tls_ctx); 15158790314SJakub Kicinski void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx); 15258790314SJakub Kicinski void tls_sw_strparser_done(struct tls_context *tls_ctx); 15358790314SJakub Kicinski int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 154df720d28SDavid Howells void tls_sw_splice_eof(struct socket *sock); 15558790314SJakub Kicinski void tls_sw_cancel_work_tx(struct tls_context *tls_ctx); 15658790314SJakub Kicinski void tls_sw_release_resources_tx(struct sock *sk); 15758790314SJakub Kicinski void tls_sw_free_ctx_tx(struct tls_context *tls_ctx); 15858790314SJakub Kicinski void tls_sw_free_resources_rx(struct sock *sk); 15958790314SJakub Kicinski void tls_sw_release_resources_rx(struct sock *sk); 16058790314SJakub Kicinski void tls_sw_free_ctx_rx(struct tls_context *tls_ctx); 16158790314SJakub Kicinski int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 16258790314SJakub Kicinski int flags, int *addr_len); 16358790314SJakub Kicinski bool tls_sw_sock_is_readable(struct sock *sk); 16458790314SJakub Kicinski ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos, 16558790314SJakub Kicinski struct pipe_inode_info *pipe, 16658790314SJakub Kicinski size_t len, unsigned int flags); 167662fbcecSHannes Reinecke int tls_sw_read_sock(struct sock *sk, read_descriptor_t *desc, 168662fbcecSHannes Reinecke sk_read_actor_t read_actor); 16958790314SJakub Kicinski 17058790314SJakub Kicinski int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size); 171d4c1e80bSDavid Howells void tls_device_splice_eof(struct socket *sock); 17258790314SJakub Kicinski int tls_tx_records(struct sock *sk, int flags); 17358790314SJakub Kicinski 17458790314SJakub Kicinski void tls_sw_write_space(struct sock *sk, struct tls_context *ctx); 17558790314SJakub Kicinski void tls_device_write_space(struct sock *sk, struct tls_context *ctx); 17658790314SJakub Kicinski 17758790314SJakub Kicinski int tls_process_cmsg(struct sock *sk, struct msghdr *msg, 17858790314SJakub Kicinski unsigned char *record_type); 179541cc48bSJakub Kicinski int decrypt_skb(struct sock *sk, struct scatterlist *sgout); 18058790314SJakub Kicinski 18158790314SJakub Kicinski int tls_sw_fallback_init(struct sock *sk, 18258790314SJakub Kicinski struct tls_offload_context_tx *offload_ctx, 18358790314SJakub Kicinski struct tls_crypto_info *crypto_info); 18458790314SJakub Kicinski 18584c61fe1SJakub Kicinski int tls_strp_dev_init(void); 18684c61fe1SJakub Kicinski void tls_strp_dev_exit(void); 18784c61fe1SJakub Kicinski 18884c61fe1SJakub Kicinski void tls_strp_done(struct tls_strparser *strp); 18984c61fe1SJakub Kicinski void tls_strp_stop(struct tls_strparser *strp); 19084c61fe1SJakub Kicinski int tls_strp_init(struct tls_strparser *strp, struct sock *sk); 19184c61fe1SJakub Kicinski void tls_strp_data_ready(struct tls_strparser *strp); 19284c61fe1SJakub Kicinski 19384c61fe1SJakub Kicinski void tls_strp_check_rcv(struct tls_strparser *strp); 19484c61fe1SJakub Kicinski void tls_strp_msg_done(struct tls_strparser *strp); 19584c61fe1SJakub Kicinski 19684c61fe1SJakub Kicinski int tls_rx_msg_size(struct tls_strparser *strp, struct sk_buff *skb); 19784c61fe1SJakub Kicinski void tls_rx_msg_ready(struct tls_strparser *strp); 19884c61fe1SJakub Kicinski 19984c61fe1SJakub Kicinski void tls_strp_msg_load(struct tls_strparser *strp, bool force_refresh); 2008b3c59a7SJakub Kicinski int tls_strp_msg_cow(struct tls_sw_context_rx *ctx); 201d4e5db64SJakub Kicinski struct sk_buff *tls_strp_msg_detach(struct tls_sw_context_rx *ctx); 20284c61fe1SJakub Kicinski int tls_strp_msg_hold(struct tls_strparser *strp, struct sk_buff_head *dst); 203c618db2aSJakub Kicinski 20458790314SJakub Kicinski static inline struct tls_msg *tls_msg(struct sk_buff *skb) 20558790314SJakub Kicinski { 20658790314SJakub Kicinski struct sk_skb_cb *scb = (struct sk_skb_cb *)skb->cb; 20758790314SJakub Kicinski 20858790314SJakub Kicinski return &scb->tls; 20958790314SJakub Kicinski } 21058790314SJakub Kicinski 211541cc48bSJakub Kicinski static inline struct sk_buff *tls_strp_msg(struct tls_sw_context_rx *ctx) 212541cc48bSJakub Kicinski { 21384c61fe1SJakub Kicinski DEBUG_NET_WARN_ON_ONCE(!ctx->strp.msg_ready || !ctx->strp.anchor->len); 21484c61fe1SJakub Kicinski return ctx->strp.anchor; 215541cc48bSJakub Kicinski } 216541cc48bSJakub Kicinski 217b92a13d4SJakub Kicinski static inline bool tls_strp_msg_ready(struct tls_sw_context_rx *ctx) 218b92a13d4SJakub Kicinski { 21984c61fe1SJakub Kicinski return ctx->strp.msg_ready; 220b92a13d4SJakub Kicinski } 221b92a13d4SJakub Kicinski 222eca9bfafSJakub Kicinski static inline bool tls_strp_msg_mixed_decrypted(struct tls_sw_context_rx *ctx) 223eca9bfafSJakub Kicinski { 224eca9bfafSJakub Kicinski return ctx->strp.mixed_decrypted; 225eca9bfafSJakub Kicinski } 226eca9bfafSJakub Kicinski 22758790314SJakub Kicinski #ifdef CONFIG_TLS_DEVICE 228816cd168SJakub Kicinski int tls_device_init(void); 22958790314SJakub Kicinski void tls_device_cleanup(void); 230*4f486699SSabrina Dubroca int tls_set_device_offload(struct sock *sk); 23158790314SJakub Kicinski void tls_device_free_resources_tx(struct sock *sk); 23258790314SJakub Kicinski int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx); 23358790314SJakub Kicinski void tls_device_offload_cleanup_rx(struct sock *sk); 23458790314SJakub Kicinski void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq); 235541cc48bSJakub Kicinski int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx); 23658790314SJakub Kicinski #else 237816cd168SJakub Kicinski static inline int tls_device_init(void) { return 0; } 23858790314SJakub Kicinski static inline void tls_device_cleanup(void) {} 23958790314SJakub Kicinski 24058790314SJakub Kicinski static inline int 241*4f486699SSabrina Dubroca tls_set_device_offload(struct sock *sk) 24258790314SJakub Kicinski { 24358790314SJakub Kicinski return -EOPNOTSUPP; 24458790314SJakub Kicinski } 24558790314SJakub Kicinski 24658790314SJakub Kicinski static inline void tls_device_free_resources_tx(struct sock *sk) {} 24758790314SJakub Kicinski 24858790314SJakub Kicinski static inline int 24958790314SJakub Kicinski tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx) 25058790314SJakub Kicinski { 25158790314SJakub Kicinski return -EOPNOTSUPP; 25258790314SJakub Kicinski } 25358790314SJakub Kicinski 25458790314SJakub Kicinski static inline void tls_device_offload_cleanup_rx(struct sock *sk) {} 25558790314SJakub Kicinski static inline void 25658790314SJakub Kicinski tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {} 25758790314SJakub Kicinski 25858790314SJakub Kicinski static inline int 259541cc48bSJakub Kicinski tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx) 26058790314SJakub Kicinski { 26158790314SJakub Kicinski return 0; 26258790314SJakub Kicinski } 26358790314SJakub Kicinski #endif 26458790314SJakub Kicinski 26558790314SJakub Kicinski int tls_push_sg(struct sock *sk, struct tls_context *ctx, 26658790314SJakub Kicinski struct scatterlist *sg, u16 first_offset, 26758790314SJakub Kicinski int flags); 26858790314SJakub Kicinski int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 26958790314SJakub Kicinski int flags); 27058790314SJakub Kicinski void tls_free_partial_record(struct sock *sk, struct tls_context *ctx); 27158790314SJakub Kicinski 27258790314SJakub Kicinski static inline bool tls_is_partially_sent_record(struct tls_context *ctx) 27358790314SJakub Kicinski { 27458790314SJakub Kicinski return !!ctx->partially_sent_record; 27558790314SJakub Kicinski } 27658790314SJakub Kicinski 27758790314SJakub Kicinski static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx) 27858790314SJakub Kicinski { 27958790314SJakub Kicinski return tls_ctx->pending_open_record_frags; 28058790314SJakub Kicinski } 28158790314SJakub Kicinski 28258790314SJakub Kicinski static inline bool tls_bigint_increment(unsigned char *seq, int len) 28358790314SJakub Kicinski { 28458790314SJakub Kicinski int i; 28558790314SJakub Kicinski 28658790314SJakub Kicinski for (i = len - 1; i >= 0; i--) { 28758790314SJakub Kicinski ++seq[i]; 28858790314SJakub Kicinski if (seq[i] != 0) 28958790314SJakub Kicinski break; 29058790314SJakub Kicinski } 29158790314SJakub Kicinski 29258790314SJakub Kicinski return (i == -1); 29358790314SJakub Kicinski } 29458790314SJakub Kicinski 29558790314SJakub Kicinski static inline void tls_bigint_subtract(unsigned char *seq, int n) 29658790314SJakub Kicinski { 29758790314SJakub Kicinski u64 rcd_sn; 29858790314SJakub Kicinski __be64 *p; 29958790314SJakub Kicinski 30058790314SJakub Kicinski BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8); 30158790314SJakub Kicinski 30258790314SJakub Kicinski p = (__be64 *)seq; 30358790314SJakub Kicinski rcd_sn = be64_to_cpu(*p); 30458790314SJakub Kicinski *p = cpu_to_be64(rcd_sn - n); 30558790314SJakub Kicinski } 30658790314SJakub Kicinski 30758790314SJakub Kicinski static inline void 30858790314SJakub Kicinski tls_advance_record_sn(struct sock *sk, struct tls_prot_info *prot, 30958790314SJakub Kicinski struct cipher_context *ctx) 31058790314SJakub Kicinski { 31158790314SJakub Kicinski if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size)) 31258790314SJakub Kicinski tls_err_abort(sk, -EBADMSG); 31358790314SJakub Kicinski 31458790314SJakub Kicinski if (prot->version != TLS_1_3_VERSION && 31558790314SJakub Kicinski prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) 31658790314SJakub Kicinski tls_bigint_increment(ctx->iv + prot->salt_size, 31758790314SJakub Kicinski prot->iv_size); 31858790314SJakub Kicinski } 31958790314SJakub Kicinski 32058790314SJakub Kicinski static inline void 32158790314SJakub Kicinski tls_xor_iv_with_seq(struct tls_prot_info *prot, char *iv, char *seq) 32258790314SJakub Kicinski { 32358790314SJakub Kicinski int i; 32458790314SJakub Kicinski 32558790314SJakub Kicinski if (prot->version == TLS_1_3_VERSION || 32658790314SJakub Kicinski prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) { 32758790314SJakub Kicinski for (i = 0; i < 8; i++) 32858790314SJakub Kicinski iv[i + 4] ^= seq[i]; 32958790314SJakub Kicinski } 33058790314SJakub Kicinski } 33158790314SJakub Kicinski 33258790314SJakub Kicinski static inline void 33358790314SJakub Kicinski tls_fill_prepend(struct tls_context *ctx, char *buf, size_t plaintext_len, 33458790314SJakub Kicinski unsigned char record_type) 33558790314SJakub Kicinski { 33658790314SJakub Kicinski struct tls_prot_info *prot = &ctx->prot_info; 33758790314SJakub Kicinski size_t pkt_len, iv_size = prot->iv_size; 33858790314SJakub Kicinski 33958790314SJakub Kicinski pkt_len = plaintext_len + prot->tag_size; 34058790314SJakub Kicinski if (prot->version != TLS_1_3_VERSION && 34158790314SJakub Kicinski prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) { 34258790314SJakub Kicinski pkt_len += iv_size; 34358790314SJakub Kicinski 34458790314SJakub Kicinski memcpy(buf + TLS_NONCE_OFFSET, 34558790314SJakub Kicinski ctx->tx.iv + prot->salt_size, iv_size); 34658790314SJakub Kicinski } 34758790314SJakub Kicinski 34858790314SJakub Kicinski /* we cover nonce explicit here as well, so buf should be of 34958790314SJakub Kicinski * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE 35058790314SJakub Kicinski */ 35158790314SJakub Kicinski buf[0] = prot->version == TLS_1_3_VERSION ? 35258790314SJakub Kicinski TLS_RECORD_TYPE_DATA : record_type; 35358790314SJakub Kicinski /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */ 35458790314SJakub Kicinski buf[1] = TLS_1_2_VERSION_MINOR; 35558790314SJakub Kicinski buf[2] = TLS_1_2_VERSION_MAJOR; 35658790314SJakub Kicinski /* we can use IV for nonce explicit according to spec */ 35758790314SJakub Kicinski buf[3] = pkt_len >> 8; 35858790314SJakub Kicinski buf[4] = pkt_len & 0xFF; 35958790314SJakub Kicinski } 36058790314SJakub Kicinski 36158790314SJakub Kicinski static inline 36258790314SJakub Kicinski void tls_make_aad(char *buf, size_t size, char *record_sequence, 36358790314SJakub Kicinski unsigned char record_type, struct tls_prot_info *prot) 36458790314SJakub Kicinski { 36558790314SJakub Kicinski if (prot->version != TLS_1_3_VERSION) { 36658790314SJakub Kicinski memcpy(buf, record_sequence, prot->rec_seq_size); 36758790314SJakub Kicinski buf += 8; 36858790314SJakub Kicinski } else { 36958790314SJakub Kicinski size += prot->tag_size; 37058790314SJakub Kicinski } 37158790314SJakub Kicinski 37258790314SJakub Kicinski buf[0] = prot->version == TLS_1_3_VERSION ? 37358790314SJakub Kicinski TLS_RECORD_TYPE_DATA : record_type; 37458790314SJakub Kicinski buf[1] = TLS_1_2_VERSION_MAJOR; 37558790314SJakub Kicinski buf[2] = TLS_1_2_VERSION_MINOR; 37658790314SJakub Kicinski buf[3] = size >> 8; 37758790314SJakub Kicinski buf[4] = size & 0xFF; 37858790314SJakub Kicinski } 37958790314SJakub Kicinski 38058790314SJakub Kicinski #endif 381