13c4d7559SDave Watson /* 23c4d7559SDave Watson * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved. 33c4d7559SDave Watson * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved. 43c4d7559SDave Watson * 53c4d7559SDave Watson * This software is available to you under a choice of one of two 63c4d7559SDave Watson * licenses. You may choose to be licensed under the terms of the GNU 73c4d7559SDave Watson * General Public License (GPL) Version 2, available from the file 83c4d7559SDave Watson * COPYING in the main directory of this source tree, or the 93c4d7559SDave Watson * OpenIB.org BSD license below: 103c4d7559SDave Watson * 113c4d7559SDave Watson * Redistribution and use in source and binary forms, with or 123c4d7559SDave Watson * without modification, are permitted provided that the following 133c4d7559SDave Watson * conditions are met: 143c4d7559SDave Watson * 153c4d7559SDave Watson * - Redistributions of source code must retain the above 163c4d7559SDave Watson * copyright notice, this list of conditions and the following 173c4d7559SDave Watson * disclaimer. 183c4d7559SDave Watson * 193c4d7559SDave Watson * - Redistributions in binary form must reproduce the above 203c4d7559SDave Watson * copyright notice, this list of conditions and the following 213c4d7559SDave Watson * disclaimer in the documentation and/or other materials 223c4d7559SDave Watson * provided with the distribution. 233c4d7559SDave Watson * 243c4d7559SDave Watson * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 253c4d7559SDave Watson * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 263c4d7559SDave Watson * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 273c4d7559SDave Watson * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 283c4d7559SDave Watson * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 293c4d7559SDave Watson * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 303c4d7559SDave Watson * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 313c4d7559SDave Watson * SOFTWARE. 323c4d7559SDave Watson */ 333c4d7559SDave Watson 343c4d7559SDave Watson #include <linux/module.h> 353c4d7559SDave Watson 363c4d7559SDave Watson #include <net/tcp.h> 373c4d7559SDave Watson #include <net/inet_common.h> 383c4d7559SDave Watson #include <linux/highmem.h> 393c4d7559SDave Watson #include <linux/netdevice.h> 403c4d7559SDave Watson #include <linux/sched/signal.h> 41dd0bed16SAtul Gupta #include <linux/inetdevice.h> 4226811cc9SDavide Caratti #include <linux/inet_diag.h> 433c4d7559SDave Watson 443c4d7559SDave Watson #include <net/tls.h> 453c4d7559SDave Watson 463c4d7559SDave Watson MODULE_AUTHOR("Mellanox Technologies"); 473c4d7559SDave Watson MODULE_DESCRIPTION("Transport Layer Security Support"); 483c4d7559SDave Watson MODULE_LICENSE("Dual BSD/GPL"); 49037b0b86SDaniel Borkmann MODULE_ALIAS_TCP_ULP("tls"); 503c4d7559SDave Watson 516d88207fSIlya Lesokhin enum { 52c113187dSBoris Pismenny TLSV4, 53c113187dSBoris Pismenny TLSV6, 54c113187dSBoris Pismenny TLS_NUM_PROTS, 55c113187dSBoris Pismenny }; 566d88207fSIlya Lesokhin 57c113187dSBoris Pismenny static struct proto *saved_tcpv6_prot; 58c113187dSBoris Pismenny static DEFINE_MUTEX(tcpv6_prot_mutex); 5928cb6f1eSJohn Fastabend static struct proto *saved_tcpv4_prot; 6028cb6f1eSJohn Fastabend static DEFINE_MUTEX(tcpv4_prot_mutex); 61dd0bed16SAtul Gupta static LIST_HEAD(device_list); 62df9d4a17SAtul Gupta static DEFINE_SPINLOCK(device_spinlock); 63f66de3eeSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 64c46234ebSDave Watson static struct proto_ops tls_sw_proto_ops; 6563a6b3feSAtul Gupta static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 6663a6b3feSAtul Gupta struct proto *base); 676d88207fSIlya Lesokhin 68f66de3eeSBoris Pismenny static void update_sk_prot(struct sock *sk, struct tls_context *ctx) 696d88207fSIlya Lesokhin { 70c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 71c113187dSBoris Pismenny 72f66de3eeSBoris Pismenny sk->sk_prot = &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]; 736d88207fSIlya Lesokhin } 743c4d7559SDave Watson 753c4d7559SDave Watson int wait_on_pending_writer(struct sock *sk, long *timeo) 763c4d7559SDave Watson { 773c4d7559SDave Watson int rc = 0; 783c4d7559SDave Watson DEFINE_WAIT_FUNC(wait, woken_wake_function); 793c4d7559SDave Watson 803c4d7559SDave Watson add_wait_queue(sk_sleep(sk), &wait); 813c4d7559SDave Watson while (1) { 823c4d7559SDave Watson if (!*timeo) { 833c4d7559SDave Watson rc = -EAGAIN; 843c4d7559SDave Watson break; 853c4d7559SDave Watson } 863c4d7559SDave Watson 873c4d7559SDave Watson if (signal_pending(current)) { 883c4d7559SDave Watson rc = sock_intr_errno(*timeo); 893c4d7559SDave Watson break; 903c4d7559SDave Watson } 913c4d7559SDave Watson 923c4d7559SDave Watson if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) 933c4d7559SDave Watson break; 943c4d7559SDave Watson } 953c4d7559SDave Watson remove_wait_queue(sk_sleep(sk), &wait); 963c4d7559SDave Watson return rc; 973c4d7559SDave Watson } 983c4d7559SDave Watson 993c4d7559SDave Watson int tls_push_sg(struct sock *sk, 1003c4d7559SDave Watson struct tls_context *ctx, 1013c4d7559SDave Watson struct scatterlist *sg, 1023c4d7559SDave Watson u16 first_offset, 1033c4d7559SDave Watson int flags) 1043c4d7559SDave Watson { 1053c4d7559SDave Watson int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; 1063c4d7559SDave Watson int ret = 0; 1073c4d7559SDave Watson struct page *p; 1083c4d7559SDave Watson size_t size; 1093c4d7559SDave Watson int offset = first_offset; 1103c4d7559SDave Watson 1113c4d7559SDave Watson size = sg->length - offset; 1123c4d7559SDave Watson offset += sg->offset; 1133c4d7559SDave Watson 114c212d2c7SDave Watson ctx->in_tcp_sendpages = true; 1153c4d7559SDave Watson while (1) { 1163c4d7559SDave Watson if (sg_is_last(sg)) 1173c4d7559SDave Watson sendpage_flags = flags; 1183c4d7559SDave Watson 1193c4d7559SDave Watson /* is sending application-limited? */ 1203c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1213c4d7559SDave Watson p = sg_page(sg); 1223c4d7559SDave Watson retry: 1233c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1243c4d7559SDave Watson 1253c4d7559SDave Watson if (ret != size) { 1263c4d7559SDave Watson if (ret > 0) { 1273c4d7559SDave Watson offset += ret; 1283c4d7559SDave Watson size -= ret; 1293c4d7559SDave Watson goto retry; 1303c4d7559SDave Watson } 1313c4d7559SDave Watson 1323c4d7559SDave Watson offset -= sg->offset; 1333c4d7559SDave Watson ctx->partially_sent_offset = offset; 1343c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 135080324c3SAndre Tomt ctx->in_tcp_sendpages = false; 1363c4d7559SDave Watson return ret; 1373c4d7559SDave Watson } 1383c4d7559SDave Watson 1393c4d7559SDave Watson put_page(p); 1403c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1413c4d7559SDave Watson sg = sg_next(sg); 1423c4d7559SDave Watson if (!sg) 1433c4d7559SDave Watson break; 1443c4d7559SDave Watson 1453c4d7559SDave Watson offset = sg->offset; 1463c4d7559SDave Watson size = sg->length; 1473c4d7559SDave Watson } 1483c4d7559SDave Watson 149c212d2c7SDave Watson ctx->in_tcp_sendpages = false; 1503c4d7559SDave Watson 1513c4d7559SDave Watson return 0; 1523c4d7559SDave Watson } 1533c4d7559SDave Watson 1543c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1553c4d7559SDave Watson { 1563c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1573c4d7559SDave Watson 1583c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1593c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1603c4d7559SDave Watson 1613c4d7559SDave Watson return 0; 1623c4d7559SDave Watson } 1633c4d7559SDave Watson 1643c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1653c4d7559SDave Watson unsigned char *record_type) 1663c4d7559SDave Watson { 1673c4d7559SDave Watson struct cmsghdr *cmsg; 1683c4d7559SDave Watson int rc = -EINVAL; 1693c4d7559SDave Watson 1703c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1713c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1723c4d7559SDave Watson return -EINVAL; 1733c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1743c4d7559SDave Watson continue; 1753c4d7559SDave Watson 1763c4d7559SDave Watson switch (cmsg->cmsg_type) { 1773c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1783c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1793c4d7559SDave Watson return -EINVAL; 1803c4d7559SDave Watson 1813c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1823c4d7559SDave Watson return -EINVAL; 1833c4d7559SDave Watson 1843c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1853c4d7559SDave Watson if (rc) 1863c4d7559SDave Watson return rc; 1873c4d7559SDave Watson 1883c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1893c4d7559SDave Watson rc = 0; 1903c4d7559SDave Watson break; 1913c4d7559SDave Watson default: 1923c4d7559SDave Watson return -EINVAL; 1933c4d7559SDave Watson } 1943c4d7559SDave Watson } 1953c4d7559SDave Watson 1963c4d7559SDave Watson return rc; 1973c4d7559SDave Watson } 1983c4d7559SDave Watson 199a42055e8SVakul Garg int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 200a42055e8SVakul Garg int flags) 2013c4d7559SDave Watson { 2023c4d7559SDave Watson struct scatterlist *sg; 2033c4d7559SDave Watson u16 offset; 2043c4d7559SDave Watson 2053c4d7559SDave Watson sg = ctx->partially_sent_record; 2063c4d7559SDave Watson offset = ctx->partially_sent_offset; 2073c4d7559SDave Watson 2083c4d7559SDave Watson ctx->partially_sent_record = NULL; 2093c4d7559SDave Watson return tls_push_sg(sk, ctx, sg, offset, flags); 2103c4d7559SDave Watson } 2113c4d7559SDave Watson 21235b71a34SJakub Kicinski bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx) 21335b71a34SJakub Kicinski { 21435b71a34SJakub Kicinski struct scatterlist *sg; 21535b71a34SJakub Kicinski 21635b71a34SJakub Kicinski sg = ctx->partially_sent_record; 21735b71a34SJakub Kicinski if (!sg) 21835b71a34SJakub Kicinski return false; 21935b71a34SJakub Kicinski 22035b71a34SJakub Kicinski while (1) { 22135b71a34SJakub Kicinski put_page(sg_page(sg)); 22235b71a34SJakub Kicinski sk_mem_uncharge(sk, sg->length); 22335b71a34SJakub Kicinski 22435b71a34SJakub Kicinski if (sg_is_last(sg)) 22535b71a34SJakub Kicinski break; 22635b71a34SJakub Kicinski sg++; 22735b71a34SJakub Kicinski } 22835b71a34SJakub Kicinski ctx->partially_sent_record = NULL; 22935b71a34SJakub Kicinski return true; 23035b71a34SJakub Kicinski } 23135b71a34SJakub Kicinski 2323c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2333c4d7559SDave Watson { 2343c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2353c4d7559SDave Watson 23667db7cd2SJohn Fastabend /* If in_tcp_sendpages call lower protocol write space handler 23767db7cd2SJohn Fastabend * to ensure we wake up any waiting operations there. For example 23867db7cd2SJohn Fastabend * if do_tcp_sendpages where to call sk_wait_event. 23967db7cd2SJohn Fastabend */ 24067db7cd2SJohn Fastabend if (ctx->in_tcp_sendpages) { 24167db7cd2SJohn Fastabend ctx->sk_write_space(sk); 242c212d2c7SDave Watson return; 24367db7cd2SJohn Fastabend } 244c212d2c7SDave Watson 2457463d3a2SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 2467463d3a2SBoris Pismenny if (ctx->tx_conf == TLS_HW) 2477463d3a2SBoris Pismenny tls_device_write_space(sk, ctx); 2487463d3a2SBoris Pismenny else 2497463d3a2SBoris Pismenny #endif 2507463d3a2SBoris Pismenny tls_sw_write_space(sk, ctx); 2514504ab0eSVakul Garg 2524504ab0eSVakul Garg ctx->sk_write_space(sk); 2533c4d7559SDave Watson } 2543c4d7559SDave Watson 25515a7dea7SJakub Kicinski /** 25615a7dea7SJakub Kicinski * tls_ctx_free() - free TLS ULP context 25715a7dea7SJakub Kicinski * @sk: socket to with @ctx is attached 25815a7dea7SJakub Kicinski * @ctx: TLS context structure 25915a7dea7SJakub Kicinski * 26015a7dea7SJakub Kicinski * Free TLS context. If @sk is %NULL caller guarantees that the socket 26115a7dea7SJakub Kicinski * to which @ctx was attached has no outstanding references. 26215a7dea7SJakub Kicinski */ 26315a7dea7SJakub Kicinski void tls_ctx_free(struct sock *sk, struct tls_context *ctx) 26486029d10SSabrina Dubroca { 26586029d10SSabrina Dubroca if (!ctx) 26686029d10SSabrina Dubroca return; 26786029d10SSabrina Dubroca 26886029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); 26986029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); 27079ffe608SJakub Kicinski mutex_destroy(&ctx->tx_lock); 27115a7dea7SJakub Kicinski 27215a7dea7SJakub Kicinski if (sk) 27315a7dea7SJakub Kicinski kfree_rcu(ctx, rcu); 27415a7dea7SJakub Kicinski else 27586029d10SSabrina Dubroca kfree(ctx); 27686029d10SSabrina Dubroca } 27786029d10SSabrina Dubroca 278313ab004SJohn Fastabend static void tls_sk_proto_cleanup(struct sock *sk, 279313ab004SJohn Fastabend struct tls_context *ctx, long timeo) 2803c4d7559SDave Watson { 2819354544cSDirk van der Merwe if (unlikely(sk->sk_write_pending) && 2829354544cSDirk van der Merwe !wait_on_pending_writer(sk, &timeo)) 2833c4d7559SDave Watson tls_handle_open_record(sk, 0); 2843c4d7559SDave Watson 285f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 286f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 287dbe42559SDave Watson kfree(ctx->tx.rec_seq); 288dbe42559SDave Watson kfree(ctx->tx.iv); 289313ab004SJohn Fastabend tls_sw_release_resources_tx(sk); 29035b71a34SJakub Kicinski } else if (ctx->tx_conf == TLS_HW) { 29135b71a34SJakub Kicinski tls_device_free_resources_tx(sk); 292f66de3eeSBoris Pismenny } 293f66de3eeSBoris Pismenny 29412c76861SJakub Kicinski if (ctx->rx_conf == TLS_SW) 295313ab004SJohn Fastabend tls_sw_release_resources_rx(sk); 296be2fbc15SJakub Kicinski else if (ctx->rx_conf == TLS_HW) 2974799ac81SBoris Pismenny tls_device_offload_cleanup_rx(sk); 298e8f69799SIlya Lesokhin } 299e8f69799SIlya Lesokhin 300313ab004SJohn Fastabend static void tls_sk_proto_close(struct sock *sk, long timeout) 301313ab004SJohn Fastabend { 30295fa1454SJohn Fastabend struct inet_connection_sock *icsk = inet_csk(sk); 303313ab004SJohn Fastabend struct tls_context *ctx = tls_get_ctx(sk); 304313ab004SJohn Fastabend long timeo = sock_sndtimeo(sk, 0); 305313ab004SJohn Fastabend bool free_ctx; 306313ab004SJohn Fastabend 307313ab004SJohn Fastabend if (ctx->tx_conf == TLS_SW) 308313ab004SJohn Fastabend tls_sw_cancel_work_tx(ctx); 309313ab004SJohn Fastabend 310313ab004SJohn Fastabend lock_sock(sk); 311313ab004SJohn Fastabend free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW; 312313ab004SJohn Fastabend 313313ab004SJohn Fastabend if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE) 314313ab004SJohn Fastabend tls_sk_proto_cleanup(sk, ctx, timeo); 315313ab004SJohn Fastabend 31695fa1454SJohn Fastabend write_lock_bh(&sk->sk_callback_lock); 31795fa1454SJohn Fastabend if (free_ctx) 31815a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, NULL); 31932857cf5SJohn Fastabend sk->sk_prot = ctx->sk_proto; 320d85f0177SJohn Fastabend if (sk->sk_write_space == tls_write_space) 32157c722e9SJakub Kicinski sk->sk_write_space = ctx->sk_write_space; 32295fa1454SJohn Fastabend write_unlock_bh(&sk->sk_callback_lock); 3233c4d7559SDave Watson release_sock(sk); 324313ab004SJohn Fastabend if (ctx->tx_conf == TLS_SW) 325313ab004SJohn Fastabend tls_sw_free_ctx_tx(ctx); 326313ab004SJohn Fastabend if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) 327313ab004SJohn Fastabend tls_sw_strparser_done(ctx); 328313ab004SJohn Fastabend if (ctx->rx_conf == TLS_SW) 329313ab004SJohn Fastabend tls_sw_free_ctx_rx(ctx); 330be7bbea1SJakub Kicinski ctx->sk_proto->close(sk, timeout); 331313ab004SJohn Fastabend 33298f0a395SEric Dumazet if (free_ctx) 33315a7dea7SJakub Kicinski tls_ctx_free(sk, ctx); 3343c4d7559SDave Watson } 3353c4d7559SDave Watson 3363c4d7559SDave Watson static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, 3373c4d7559SDave Watson int __user *optlen) 3383c4d7559SDave Watson { 3393c4d7559SDave Watson int rc = 0; 3403c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3413c4d7559SDave Watson struct tls_crypto_info *crypto_info; 3423c4d7559SDave Watson int len; 3433c4d7559SDave Watson 3443c4d7559SDave Watson if (get_user(len, optlen)) 3453c4d7559SDave Watson return -EFAULT; 3463c4d7559SDave Watson 3473c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 3483c4d7559SDave Watson rc = -EINVAL; 3493c4d7559SDave Watson goto out; 3503c4d7559SDave Watson } 3513c4d7559SDave Watson 3523c4d7559SDave Watson if (!ctx) { 3533c4d7559SDave Watson rc = -EBUSY; 3543c4d7559SDave Watson goto out; 3553c4d7559SDave Watson } 3563c4d7559SDave Watson 3573c4d7559SDave Watson /* get user crypto info */ 35886029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 3593c4d7559SDave Watson 3603c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3613c4d7559SDave Watson rc = -EBUSY; 3623c4d7559SDave Watson goto out; 3633c4d7559SDave Watson } 3643c4d7559SDave Watson 3655a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 366ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 367ac55cd61SDan Carpenter rc = -EFAULT; 3683c4d7559SDave Watson goto out; 3693c4d7559SDave Watson } 3703c4d7559SDave Watson 3713c4d7559SDave Watson switch (crypto_info->cipher_type) { 3723c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3733c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3743c4d7559SDave Watson crypto_info_aes_gcm_128 = 3753c4d7559SDave Watson container_of(crypto_info, 3763c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3773c4d7559SDave Watson info); 3783c4d7559SDave Watson 3793c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3803c4d7559SDave Watson rc = -EINVAL; 3813c4d7559SDave Watson goto out; 3823c4d7559SDave Watson } 3833c4d7559SDave Watson lock_sock(sk); 384a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 385dbe42559SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3863c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 387dbe42559SDave Watson memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, 388c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3893c4d7559SDave Watson release_sock(sk); 390ac55cd61SDan Carpenter if (copy_to_user(optval, 3913c4d7559SDave Watson crypto_info_aes_gcm_128, 392ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 393ac55cd61SDan Carpenter rc = -EFAULT; 3943c4d7559SDave Watson break; 3953c4d7559SDave Watson } 396fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 397fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256 * 398fb99bce7SDave Watson crypto_info_aes_gcm_256 = 399fb99bce7SDave Watson container_of(crypto_info, 400fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256, 401fb99bce7SDave Watson info); 402fb99bce7SDave Watson 403fb99bce7SDave Watson if (len != sizeof(*crypto_info_aes_gcm_256)) { 404fb99bce7SDave Watson rc = -EINVAL; 405fb99bce7SDave Watson goto out; 406fb99bce7SDave Watson } 407fb99bce7SDave Watson lock_sock(sk); 408fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->iv, 409fb99bce7SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, 410fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_IV_SIZE); 411fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->rec_seq, ctx->tx.rec_seq, 412fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); 413fb99bce7SDave Watson release_sock(sk); 414fb99bce7SDave Watson if (copy_to_user(optval, 415fb99bce7SDave Watson crypto_info_aes_gcm_256, 416fb99bce7SDave Watson sizeof(*crypto_info_aes_gcm_256))) 417fb99bce7SDave Watson rc = -EFAULT; 418fb99bce7SDave Watson break; 419fb99bce7SDave Watson } 4203c4d7559SDave Watson default: 4213c4d7559SDave Watson rc = -EINVAL; 4223c4d7559SDave Watson } 4233c4d7559SDave Watson 4243c4d7559SDave Watson out: 4253c4d7559SDave Watson return rc; 4263c4d7559SDave Watson } 4273c4d7559SDave Watson 4283c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 4293c4d7559SDave Watson char __user *optval, int __user *optlen) 4303c4d7559SDave Watson { 4313c4d7559SDave Watson int rc = 0; 4323c4d7559SDave Watson 4333c4d7559SDave Watson switch (optname) { 4343c4d7559SDave Watson case TLS_TX: 4353c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 4363c4d7559SDave Watson break; 4373c4d7559SDave Watson default: 4383c4d7559SDave Watson rc = -ENOPROTOOPT; 4393c4d7559SDave Watson break; 4403c4d7559SDave Watson } 4413c4d7559SDave Watson return rc; 4423c4d7559SDave Watson } 4433c4d7559SDave Watson 4443c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 4453c4d7559SDave Watson char __user *optval, int __user *optlen) 4463c4d7559SDave Watson { 4473c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4483c4d7559SDave Watson 4493c4d7559SDave Watson if (level != SOL_TLS) 450be7bbea1SJakub Kicinski return ctx->sk_proto->getsockopt(sk, level, 451be7bbea1SJakub Kicinski optname, optval, optlen); 4523c4d7559SDave Watson 4533c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 4543c4d7559SDave Watson } 4553c4d7559SDave Watson 456c46234ebSDave Watson static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, 457c46234ebSDave Watson unsigned int optlen, int tx) 4583c4d7559SDave Watson { 459196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4604509de14SVakul Garg struct tls_crypto_info *alt_crypto_info; 4613c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 462fb99bce7SDave Watson size_t optsize; 4633c4d7559SDave Watson int rc = 0; 46458371585SDave Watson int conf; 4653c4d7559SDave Watson 4663c4d7559SDave Watson if (!optval || (optlen < sizeof(*crypto_info))) { 4673c4d7559SDave Watson rc = -EINVAL; 4683c4d7559SDave Watson goto out; 4693c4d7559SDave Watson } 4703c4d7559SDave Watson 4714509de14SVakul Garg if (tx) { 47286029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 4734509de14SVakul Garg alt_crypto_info = &ctx->crypto_recv.info; 4744509de14SVakul Garg } else { 47586029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 4764509de14SVakul Garg alt_crypto_info = &ctx->crypto_send.info; 4774509de14SVakul Garg } 478c46234ebSDave Watson 479196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 480877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 481877d17c7SSabrina Dubroca rc = -EBUSY; 482196c31b4SIlya Lesokhin goto out; 483877d17c7SSabrina Dubroca } 484196c31b4SIlya Lesokhin 485196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); 4863c4d7559SDave Watson if (rc) { 4873c4d7559SDave Watson rc = -EFAULT; 488257082e6SBoris Pismenny goto err_crypto_info; 4893c4d7559SDave Watson } 4903c4d7559SDave Watson 4913c4d7559SDave Watson /* check version */ 492130b392cSDave Watson if (crypto_info->version != TLS_1_2_VERSION && 493130b392cSDave Watson crypto_info->version != TLS_1_3_VERSION) { 4943c4d7559SDave Watson rc = -ENOTSUPP; 495196c31b4SIlya Lesokhin goto err_crypto_info; 4963c4d7559SDave Watson } 4973c4d7559SDave Watson 4984509de14SVakul Garg /* Ensure that TLS version and ciphers are same in both directions */ 4994509de14SVakul Garg if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { 5004509de14SVakul Garg if (alt_crypto_info->version != crypto_info->version || 5014509de14SVakul Garg alt_crypto_info->cipher_type != crypto_info->cipher_type) { 5024509de14SVakul Garg rc = -EINVAL; 5034509de14SVakul Garg goto err_crypto_info; 5044509de14SVakul Garg } 5054509de14SVakul Garg } 5064509de14SVakul Garg 507196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 508fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_128: 509f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_128); 510f295b3aeSVakul Garg break; 511fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 512f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_256); 513f295b3aeSVakul Garg break; 514f295b3aeSVakul Garg } 515f295b3aeSVakul Garg case TLS_CIPHER_AES_CCM_128: 516f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_ccm_128); 517f295b3aeSVakul Garg break; 518f295b3aeSVakul Garg default: 519f295b3aeSVakul Garg rc = -EINVAL; 520f295b3aeSVakul Garg goto err_crypto_info; 521f295b3aeSVakul Garg } 522f295b3aeSVakul Garg 523fb99bce7SDave Watson if (optlen != optsize) { 5243c4d7559SDave Watson rc = -EINVAL; 5256db959c8SSabrina Dubroca goto err_crypto_info; 5263c4d7559SDave Watson } 527f295b3aeSVakul Garg 528196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), 529196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 5303c4d7559SDave Watson if (rc) { 5313c4d7559SDave Watson rc = -EFAULT; 5323c4d7559SDave Watson goto err_crypto_info; 5333c4d7559SDave Watson } 5343c4d7559SDave Watson 535c46234ebSDave Watson if (tx) { 536e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 537e8f69799SIlya Lesokhin conf = TLS_HW; 538e8f69799SIlya Lesokhin if (rc) { 539c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 540318892acSJakub Kicinski if (rc) 541318892acSJakub Kicinski goto err_crypto_info; 542f66de3eeSBoris Pismenny conf = TLS_SW; 543e8f69799SIlya Lesokhin } 544c46234ebSDave Watson } else { 5454799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 5464799ac81SBoris Pismenny conf = TLS_HW; 5474799ac81SBoris Pismenny if (rc) { 548c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 549318892acSJakub Kicinski if (rc) 550318892acSJakub Kicinski goto err_crypto_info; 551f66de3eeSBoris Pismenny conf = TLS_SW; 552c46234ebSDave Watson } 553313ab004SJohn Fastabend tls_sw_strparser_arm(sk, ctx); 5544799ac81SBoris Pismenny } 555c46234ebSDave Watson 556f66de3eeSBoris Pismenny if (tx) 557f66de3eeSBoris Pismenny ctx->tx_conf = conf; 558f66de3eeSBoris Pismenny else 559f66de3eeSBoris Pismenny ctx->rx_conf = conf; 5606d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 561c46234ebSDave Watson if (tx) { 562ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 563ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 564c46234ebSDave Watson } else { 565c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 566c46234ebSDave Watson } 5673c4d7559SDave Watson goto out; 5683c4d7559SDave Watson 5693c4d7559SDave Watson err_crypto_info: 570c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 5713c4d7559SDave Watson out: 5723c4d7559SDave Watson return rc; 5733c4d7559SDave Watson } 5743c4d7559SDave Watson 5753c4d7559SDave Watson static int do_tls_setsockopt(struct sock *sk, int optname, 5763c4d7559SDave Watson char __user *optval, unsigned int optlen) 5773c4d7559SDave Watson { 5783c4d7559SDave Watson int rc = 0; 5793c4d7559SDave Watson 5803c4d7559SDave Watson switch (optname) { 5813c4d7559SDave Watson case TLS_TX: 582c46234ebSDave Watson case TLS_RX: 5833c4d7559SDave Watson lock_sock(sk); 584c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 585c46234ebSDave Watson optname == TLS_TX); 5863c4d7559SDave Watson release_sock(sk); 5873c4d7559SDave Watson break; 5883c4d7559SDave Watson default: 5893c4d7559SDave Watson rc = -ENOPROTOOPT; 5903c4d7559SDave Watson break; 5913c4d7559SDave Watson } 5923c4d7559SDave Watson return rc; 5933c4d7559SDave Watson } 5943c4d7559SDave Watson 5953c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 5963c4d7559SDave Watson char __user *optval, unsigned int optlen) 5973c4d7559SDave Watson { 5983c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 5993c4d7559SDave Watson 6003c4d7559SDave Watson if (level != SOL_TLS) 601be7bbea1SJakub Kicinski return ctx->sk_proto->setsockopt(sk, level, optname, optval, 602be7bbea1SJakub Kicinski optlen); 6033c4d7559SDave Watson 6043c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 6053c4d7559SDave Watson } 6063c4d7559SDave Watson 607dd0bed16SAtul Gupta static struct tls_context *create_ctx(struct sock *sk) 608dd0bed16SAtul Gupta { 609dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 610dd0bed16SAtul Gupta struct tls_context *ctx; 611dd0bed16SAtul Gupta 612c6ec179aSGanesh Goudar ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); 613dd0bed16SAtul Gupta if (!ctx) 614dd0bed16SAtul Gupta return NULL; 615dd0bed16SAtul Gupta 61679ffe608SJakub Kicinski mutex_init(&ctx->tx_lock); 61715a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, ctx); 618be7bbea1SJakub Kicinski ctx->sk_proto = sk->sk_prot; 619dd0bed16SAtul Gupta return ctx; 620dd0bed16SAtul Gupta } 621dd0bed16SAtul Gupta 62263a6b3feSAtul Gupta static void tls_build_proto(struct sock *sk) 62363a6b3feSAtul Gupta { 62463a6b3feSAtul Gupta int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 62563a6b3feSAtul Gupta 62663a6b3feSAtul Gupta /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 62763a6b3feSAtul Gupta if (ip_ver == TLSV6 && 62863a6b3feSAtul Gupta unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { 62963a6b3feSAtul Gupta mutex_lock(&tcpv6_prot_mutex); 63063a6b3feSAtul Gupta if (likely(sk->sk_prot != saved_tcpv6_prot)) { 63163a6b3feSAtul Gupta build_protos(tls_prots[TLSV6], sk->sk_prot); 63263a6b3feSAtul Gupta smp_store_release(&saved_tcpv6_prot, sk->sk_prot); 63363a6b3feSAtul Gupta } 63463a6b3feSAtul Gupta mutex_unlock(&tcpv6_prot_mutex); 63563a6b3feSAtul Gupta } 63663a6b3feSAtul Gupta 63763a6b3feSAtul Gupta if (ip_ver == TLSV4 && 63863a6b3feSAtul Gupta unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv4_prot))) { 63963a6b3feSAtul Gupta mutex_lock(&tcpv4_prot_mutex); 64063a6b3feSAtul Gupta if (likely(sk->sk_prot != saved_tcpv4_prot)) { 64163a6b3feSAtul Gupta build_protos(tls_prots[TLSV4], sk->sk_prot); 64263a6b3feSAtul Gupta smp_store_release(&saved_tcpv4_prot, sk->sk_prot); 64363a6b3feSAtul Gupta } 64463a6b3feSAtul Gupta mutex_unlock(&tcpv4_prot_mutex); 64563a6b3feSAtul Gupta } 64663a6b3feSAtul Gupta } 64763a6b3feSAtul Gupta 64876f7164dSAtul Gupta static void tls_hw_sk_destruct(struct sock *sk) 64976f7164dSAtul Gupta { 65076f7164dSAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 65176f7164dSAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 65276f7164dSAtul Gupta 65376f7164dSAtul Gupta ctx->sk_destruct(sk); 65476f7164dSAtul Gupta /* Free ctx */ 65515a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, NULL); 65615a7dea7SJakub Kicinski tls_ctx_free(sk, ctx); 65776f7164dSAtul Gupta } 65876f7164dSAtul Gupta 659dd0bed16SAtul Gupta static int tls_hw_prot(struct sock *sk) 660dd0bed16SAtul Gupta { 661dd0bed16SAtul Gupta struct tls_context *ctx; 662dd0bed16SAtul Gupta struct tls_device *dev; 663dd0bed16SAtul Gupta int rc = 0; 664dd0bed16SAtul Gupta 665df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 666dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 667dd0bed16SAtul Gupta if (dev->feature && dev->feature(dev)) { 668dd0bed16SAtul Gupta ctx = create_ctx(sk); 669dd0bed16SAtul Gupta if (!ctx) 670dd0bed16SAtul Gupta goto out; 671dd0bed16SAtul Gupta 67263a6b3feSAtul Gupta spin_unlock_bh(&device_spinlock); 67363a6b3feSAtul Gupta tls_build_proto(sk); 67476f7164dSAtul Gupta ctx->sk_destruct = sk->sk_destruct; 67576f7164dSAtul Gupta sk->sk_destruct = tls_hw_sk_destruct; 676f66de3eeSBoris Pismenny ctx->rx_conf = TLS_HW_RECORD; 677f66de3eeSBoris Pismenny ctx->tx_conf = TLS_HW_RECORD; 678dd0bed16SAtul Gupta update_sk_prot(sk, ctx); 67963a6b3feSAtul Gupta spin_lock_bh(&device_spinlock); 680dd0bed16SAtul Gupta rc = 1; 681dd0bed16SAtul Gupta break; 682dd0bed16SAtul Gupta } 683dd0bed16SAtul Gupta } 684dd0bed16SAtul Gupta out: 685df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 686dd0bed16SAtul Gupta return rc; 687dd0bed16SAtul Gupta } 688dd0bed16SAtul Gupta 689dd0bed16SAtul Gupta static void tls_hw_unhash(struct sock *sk) 690dd0bed16SAtul Gupta { 691dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 692dd0bed16SAtul Gupta struct tls_device *dev; 693dd0bed16SAtul Gupta 694df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 695dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 696df9d4a17SAtul Gupta if (dev->unhash) { 697df9d4a17SAtul Gupta kref_get(&dev->kref); 698df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 699dd0bed16SAtul Gupta dev->unhash(dev, sk); 700df9d4a17SAtul Gupta kref_put(&dev->kref, dev->release); 701df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 702dd0bed16SAtul Gupta } 703df9d4a17SAtul Gupta } 704df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 705be7bbea1SJakub Kicinski ctx->sk_proto->unhash(sk); 706dd0bed16SAtul Gupta } 707dd0bed16SAtul Gupta 708dd0bed16SAtul Gupta static int tls_hw_hash(struct sock *sk) 709dd0bed16SAtul Gupta { 710dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 711dd0bed16SAtul Gupta struct tls_device *dev; 712dd0bed16SAtul Gupta int err; 713dd0bed16SAtul Gupta 714be7bbea1SJakub Kicinski err = ctx->sk_proto->hash(sk); 715df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 716dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 717df9d4a17SAtul Gupta if (dev->hash) { 718df9d4a17SAtul Gupta kref_get(&dev->kref); 719df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 720dd0bed16SAtul Gupta err |= dev->hash(dev, sk); 721df9d4a17SAtul Gupta kref_put(&dev->kref, dev->release); 722df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 723dd0bed16SAtul Gupta } 724df9d4a17SAtul Gupta } 725df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 726dd0bed16SAtul Gupta 727dd0bed16SAtul Gupta if (err) 728dd0bed16SAtul Gupta tls_hw_unhash(sk); 729dd0bed16SAtul Gupta return err; 730dd0bed16SAtul Gupta } 731dd0bed16SAtul Gupta 732f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 733f66de3eeSBoris Pismenny struct proto *base) 734c113187dSBoris Pismenny { 735f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 736f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 737f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 738f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 739c113187dSBoris Pismenny 740f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 741f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 742f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 743c46234ebSDave Watson 744f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 745f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 746924ad65eSJohn Fastabend prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read; 747f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 748c46234ebSDave Watson 749f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 750f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 751924ad65eSJohn Fastabend prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read; 752f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 753dd0bed16SAtul Gupta 754e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 755e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 756e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 757e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 758e8f69799SIlya Lesokhin 759e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 760e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 761e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 7624799ac81SBoris Pismenny 7634799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 7644799ac81SBoris Pismenny 7654799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 7664799ac81SBoris Pismenny 7674799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 768e8f69799SIlya Lesokhin #endif 769e8f69799SIlya Lesokhin 770f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 771f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash; 772f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash; 773c113187dSBoris Pismenny } 774c113187dSBoris Pismenny 7753c4d7559SDave Watson static int tls_init(struct sock *sk) 7763c4d7559SDave Watson { 7773c4d7559SDave Watson struct tls_context *ctx; 7783c4d7559SDave Watson int rc = 0; 7793c4d7559SDave Watson 780dd0bed16SAtul Gupta if (tls_hw_prot(sk)) 78195fa1454SJohn Fastabend return 0; 782dd0bed16SAtul Gupta 783d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 784d91c3e17SIlya Lesokhin * in ESTABLISHED state. 785d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 786d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 787d91c3e17SIlya Lesokhin * share the ulp context. 788d91c3e17SIlya Lesokhin */ 789d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 790d91c3e17SIlya Lesokhin return -ENOTSUPP; 791d91c3e17SIlya Lesokhin 79295fa1454SJohn Fastabend tls_build_proto(sk); 79395fa1454SJohn Fastabend 7943c4d7559SDave Watson /* allocate tls context */ 79595fa1454SJohn Fastabend write_lock_bh(&sk->sk_callback_lock); 796dd0bed16SAtul Gupta ctx = create_ctx(sk); 7973c4d7559SDave Watson if (!ctx) { 7983c4d7559SDave Watson rc = -ENOMEM; 7993c4d7559SDave Watson goto out; 8003c4d7559SDave Watson } 8016d88207fSIlya Lesokhin 802f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 803f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 8046d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 8053c4d7559SDave Watson out: 80695fa1454SJohn Fastabend write_unlock_bh(&sk->sk_callback_lock); 8073c4d7559SDave Watson return rc; 8083c4d7559SDave Watson } 8093c4d7559SDave Watson 81095fa1454SJohn Fastabend static void tls_update(struct sock *sk, struct proto *p) 81195fa1454SJohn Fastabend { 81295fa1454SJohn Fastabend struct tls_context *ctx; 81395fa1454SJohn Fastabend 81495fa1454SJohn Fastabend ctx = tls_get_ctx(sk); 815be7bbea1SJakub Kicinski if (likely(ctx)) 81695fa1454SJohn Fastabend ctx->sk_proto = p; 817be7bbea1SJakub Kicinski else 81895fa1454SJohn Fastabend sk->sk_prot = p; 81995fa1454SJohn Fastabend } 82095fa1454SJohn Fastabend 82126811cc9SDavide Caratti static int tls_get_info(const struct sock *sk, struct sk_buff *skb) 82226811cc9SDavide Caratti { 82326811cc9SDavide Caratti u16 version, cipher_type; 82426811cc9SDavide Caratti struct tls_context *ctx; 82526811cc9SDavide Caratti struct nlattr *start; 82626811cc9SDavide Caratti int err; 82726811cc9SDavide Caratti 82826811cc9SDavide Caratti start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS); 82926811cc9SDavide Caratti if (!start) 83026811cc9SDavide Caratti return -EMSGSIZE; 83126811cc9SDavide Caratti 83226811cc9SDavide Caratti rcu_read_lock(); 83326811cc9SDavide Caratti ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data); 83426811cc9SDavide Caratti if (!ctx) { 83526811cc9SDavide Caratti err = 0; 83626811cc9SDavide Caratti goto nla_failure; 83726811cc9SDavide Caratti } 83826811cc9SDavide Caratti version = ctx->prot_info.version; 83926811cc9SDavide Caratti if (version) { 84026811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_VERSION, version); 84126811cc9SDavide Caratti if (err) 84226811cc9SDavide Caratti goto nla_failure; 84326811cc9SDavide Caratti } 84426811cc9SDavide Caratti cipher_type = ctx->prot_info.cipher_type; 84526811cc9SDavide Caratti if (cipher_type) { 84626811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type); 84726811cc9SDavide Caratti if (err) 84826811cc9SDavide Caratti goto nla_failure; 84926811cc9SDavide Caratti } 85026811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true)); 85126811cc9SDavide Caratti if (err) 85226811cc9SDavide Caratti goto nla_failure; 85326811cc9SDavide Caratti 85426811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false)); 85526811cc9SDavide Caratti if (err) 85626811cc9SDavide Caratti goto nla_failure; 85726811cc9SDavide Caratti 85826811cc9SDavide Caratti rcu_read_unlock(); 85926811cc9SDavide Caratti nla_nest_end(skb, start); 86026811cc9SDavide Caratti return 0; 86126811cc9SDavide Caratti 86226811cc9SDavide Caratti nla_failure: 86326811cc9SDavide Caratti rcu_read_unlock(); 86426811cc9SDavide Caratti nla_nest_cancel(skb, start); 86526811cc9SDavide Caratti return err; 86626811cc9SDavide Caratti } 86726811cc9SDavide Caratti 86826811cc9SDavide Caratti static size_t tls_get_info_size(const struct sock *sk) 86926811cc9SDavide Caratti { 87026811cc9SDavide Caratti size_t size = 0; 87126811cc9SDavide Caratti 87226811cc9SDavide Caratti size += nla_total_size(0) + /* INET_ULP_INFO_TLS */ 87326811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */ 87426811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */ 87526811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */ 87626811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */ 87726811cc9SDavide Caratti 0; 87826811cc9SDavide Caratti 87926811cc9SDavide Caratti return size; 88026811cc9SDavide Caratti } 88126811cc9SDavide Caratti 882dd0bed16SAtul Gupta void tls_register_device(struct tls_device *device) 883dd0bed16SAtul Gupta { 884df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 885dd0bed16SAtul Gupta list_add_tail(&device->dev_list, &device_list); 886df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 887dd0bed16SAtul Gupta } 888dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_register_device); 889dd0bed16SAtul Gupta 890dd0bed16SAtul Gupta void tls_unregister_device(struct tls_device *device) 891dd0bed16SAtul Gupta { 892df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 893dd0bed16SAtul Gupta list_del(&device->dev_list); 894df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 895dd0bed16SAtul Gupta } 896dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_unregister_device); 897dd0bed16SAtul Gupta 8983c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 8993c4d7559SDave Watson .name = "tls", 9003c4d7559SDave Watson .owner = THIS_MODULE, 9013c4d7559SDave Watson .init = tls_init, 90295fa1454SJohn Fastabend .update = tls_update, 90326811cc9SDavide Caratti .get_info = tls_get_info, 90426811cc9SDavide Caratti .get_info_size = tls_get_info_size, 9053c4d7559SDave Watson }; 9063c4d7559SDave Watson 9073c4d7559SDave Watson static int __init tls_register(void) 9083c4d7559SDave Watson { 909c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 910c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 911c46234ebSDave Watson 912e8f69799SIlya Lesokhin tls_device_init(); 9133c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 9143c4d7559SDave Watson 9153c4d7559SDave Watson return 0; 9163c4d7559SDave Watson } 9173c4d7559SDave Watson 9183c4d7559SDave Watson static void __exit tls_unregister(void) 9193c4d7559SDave Watson { 9203c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 921e8f69799SIlya Lesokhin tls_device_cleanup(); 9223c4d7559SDave Watson } 9233c4d7559SDave Watson 9243c4d7559SDave Watson module_init(tls_register); 9253c4d7559SDave Watson module_exit(tls_unregister); 926