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 44d26b698dSJakub Kicinski #include <net/snmp.h> 453c4d7559SDave Watson #include <net/tls.h> 4625a3cd81SJakub Kicinski #include <net/tls_toe.h> 473c4d7559SDave Watson 483c4d7559SDave Watson MODULE_AUTHOR("Mellanox Technologies"); 493c4d7559SDave Watson MODULE_DESCRIPTION("Transport Layer Security Support"); 503c4d7559SDave Watson MODULE_LICENSE("Dual BSD/GPL"); 51037b0b86SDaniel Borkmann MODULE_ALIAS_TCP_ULP("tls"); 523c4d7559SDave Watson 536d88207fSIlya Lesokhin enum { 54c113187dSBoris Pismenny TLSV4, 55c113187dSBoris Pismenny TLSV6, 56c113187dSBoris Pismenny TLS_NUM_PROTS, 57c113187dSBoris Pismenny }; 586d88207fSIlya Lesokhin 59f691a25cSArnd Bergmann static const struct proto *saved_tcpv6_prot; 60c113187dSBoris Pismenny static DEFINE_MUTEX(tcpv6_prot_mutex); 61f691a25cSArnd Bergmann static const struct proto *saved_tcpv4_prot; 6228cb6f1eSJohn Fastabend static DEFINE_MUTEX(tcpv4_prot_mutex); 63f66de3eeSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 64f3911f73SJakub Kicinski static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 6563a6b3feSAtul Gupta static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 66f13fe3e6SJakub Sitnicki const struct proto *base); 676d88207fSIlya Lesokhin 6808700dabSJakub Kicinski 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 72d5bee737SJakub Sitnicki WRITE_ONCE(sk->sk_prot, 73d5bee737SJakub Sitnicki &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]); 74f3911f73SJakub Kicinski WRITE_ONCE(sk->sk_socket->ops, 75f3911f73SJakub Kicinski &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]); 766d88207fSIlya Lesokhin } 773c4d7559SDave Watson 783c4d7559SDave Watson int wait_on_pending_writer(struct sock *sk, long *timeo) 793c4d7559SDave Watson { 803c4d7559SDave Watson int rc = 0; 813c4d7559SDave Watson DEFINE_WAIT_FUNC(wait, woken_wake_function); 823c4d7559SDave Watson 833c4d7559SDave Watson add_wait_queue(sk_sleep(sk), &wait); 843c4d7559SDave Watson while (1) { 853c4d7559SDave Watson if (!*timeo) { 863c4d7559SDave Watson rc = -EAGAIN; 873c4d7559SDave Watson break; 883c4d7559SDave Watson } 893c4d7559SDave Watson 903c4d7559SDave Watson if (signal_pending(current)) { 913c4d7559SDave Watson rc = sock_intr_errno(*timeo); 923c4d7559SDave Watson break; 933c4d7559SDave Watson } 943c4d7559SDave Watson 953c4d7559SDave Watson if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) 963c4d7559SDave Watson break; 973c4d7559SDave Watson } 983c4d7559SDave Watson remove_wait_queue(sk_sleep(sk), &wait); 993c4d7559SDave Watson return rc; 1003c4d7559SDave Watson } 1013c4d7559SDave Watson 1023c4d7559SDave Watson int tls_push_sg(struct sock *sk, 1033c4d7559SDave Watson struct tls_context *ctx, 1043c4d7559SDave Watson struct scatterlist *sg, 1053c4d7559SDave Watson u16 first_offset, 1063c4d7559SDave Watson int flags) 1073c4d7559SDave Watson { 1083c4d7559SDave Watson int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; 1093c4d7559SDave Watson int ret = 0; 1103c4d7559SDave Watson struct page *p; 1113c4d7559SDave Watson size_t size; 1123c4d7559SDave Watson int offset = first_offset; 1133c4d7559SDave Watson 1143c4d7559SDave Watson size = sg->length - offset; 1153c4d7559SDave Watson offset += sg->offset; 1163c4d7559SDave Watson 117c212d2c7SDave Watson ctx->in_tcp_sendpages = true; 1183c4d7559SDave Watson while (1) { 1193c4d7559SDave Watson if (sg_is_last(sg)) 1203c4d7559SDave Watson sendpage_flags = flags; 1213c4d7559SDave Watson 1223c4d7559SDave Watson /* is sending application-limited? */ 1233c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1243c4d7559SDave Watson p = sg_page(sg); 1253c4d7559SDave Watson retry: 1263c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1273c4d7559SDave Watson 1283c4d7559SDave Watson if (ret != size) { 1293c4d7559SDave Watson if (ret > 0) { 1303c4d7559SDave Watson offset += ret; 1313c4d7559SDave Watson size -= ret; 1323c4d7559SDave Watson goto retry; 1333c4d7559SDave Watson } 1343c4d7559SDave Watson 1353c4d7559SDave Watson offset -= sg->offset; 1363c4d7559SDave Watson ctx->partially_sent_offset = offset; 1373c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 138080324c3SAndre Tomt ctx->in_tcp_sendpages = false; 1393c4d7559SDave Watson return ret; 1403c4d7559SDave Watson } 1413c4d7559SDave Watson 1423c4d7559SDave Watson put_page(p); 1433c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1443c4d7559SDave Watson sg = sg_next(sg); 1453c4d7559SDave Watson if (!sg) 1463c4d7559SDave Watson break; 1473c4d7559SDave Watson 1483c4d7559SDave Watson offset = sg->offset; 1493c4d7559SDave Watson size = sg->length; 1503c4d7559SDave Watson } 1513c4d7559SDave Watson 152c212d2c7SDave Watson ctx->in_tcp_sendpages = false; 1533c4d7559SDave Watson 1543c4d7559SDave Watson return 0; 1553c4d7559SDave Watson } 1563c4d7559SDave Watson 1573c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1583c4d7559SDave Watson { 1593c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1603c4d7559SDave Watson 1613c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1623c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1633c4d7559SDave Watson 1643c4d7559SDave Watson return 0; 1653c4d7559SDave Watson } 1663c4d7559SDave Watson 1673c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1683c4d7559SDave Watson unsigned char *record_type) 1693c4d7559SDave Watson { 1703c4d7559SDave Watson struct cmsghdr *cmsg; 1713c4d7559SDave Watson int rc = -EINVAL; 1723c4d7559SDave Watson 1733c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1743c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1753c4d7559SDave Watson return -EINVAL; 1763c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1773c4d7559SDave Watson continue; 1783c4d7559SDave Watson 1793c4d7559SDave Watson switch (cmsg->cmsg_type) { 1803c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1813c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1823c4d7559SDave Watson return -EINVAL; 1833c4d7559SDave Watson 1843c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1853c4d7559SDave Watson return -EINVAL; 1863c4d7559SDave Watson 1873c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1883c4d7559SDave Watson if (rc) 1893c4d7559SDave Watson return rc; 1903c4d7559SDave Watson 1913c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1923c4d7559SDave Watson rc = 0; 1933c4d7559SDave Watson break; 1943c4d7559SDave Watson default: 1953c4d7559SDave Watson return -EINVAL; 1963c4d7559SDave Watson } 1973c4d7559SDave Watson } 1983c4d7559SDave Watson 1993c4d7559SDave Watson return rc; 2003c4d7559SDave Watson } 2013c4d7559SDave Watson 202a42055e8SVakul Garg int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 203a42055e8SVakul Garg int flags) 2043c4d7559SDave Watson { 2053c4d7559SDave Watson struct scatterlist *sg; 2063c4d7559SDave Watson u16 offset; 2073c4d7559SDave Watson 2083c4d7559SDave Watson sg = ctx->partially_sent_record; 2093c4d7559SDave Watson offset = ctx->partially_sent_offset; 2103c4d7559SDave Watson 2113c4d7559SDave Watson ctx->partially_sent_record = NULL; 2123c4d7559SDave Watson return tls_push_sg(sk, ctx, sg, offset, flags); 2133c4d7559SDave Watson } 2143c4d7559SDave Watson 215c5daa6ccSJakub Kicinski void tls_free_partial_record(struct sock *sk, struct tls_context *ctx) 21635b71a34SJakub Kicinski { 21735b71a34SJakub Kicinski struct scatterlist *sg; 21835b71a34SJakub Kicinski 219c5daa6ccSJakub Kicinski for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) { 22035b71a34SJakub Kicinski put_page(sg_page(sg)); 22135b71a34SJakub Kicinski sk_mem_uncharge(sk, sg->length); 22235b71a34SJakub Kicinski } 22335b71a34SJakub Kicinski ctx->partially_sent_record = NULL; 22435b71a34SJakub Kicinski } 22535b71a34SJakub Kicinski 2263c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2273c4d7559SDave Watson { 2283c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2293c4d7559SDave Watson 23067db7cd2SJohn Fastabend /* If in_tcp_sendpages call lower protocol write space handler 23167db7cd2SJohn Fastabend * to ensure we wake up any waiting operations there. For example 23267db7cd2SJohn Fastabend * if do_tcp_sendpages where to call sk_wait_event. 23367db7cd2SJohn Fastabend */ 23467db7cd2SJohn Fastabend if (ctx->in_tcp_sendpages) { 23567db7cd2SJohn Fastabend ctx->sk_write_space(sk); 236c212d2c7SDave Watson return; 23767db7cd2SJohn Fastabend } 238c212d2c7SDave Watson 2397463d3a2SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 2407463d3a2SBoris Pismenny if (ctx->tx_conf == TLS_HW) 2417463d3a2SBoris Pismenny tls_device_write_space(sk, ctx); 2427463d3a2SBoris Pismenny else 2437463d3a2SBoris Pismenny #endif 2447463d3a2SBoris Pismenny tls_sw_write_space(sk, ctx); 2454504ab0eSVakul Garg 2464504ab0eSVakul Garg ctx->sk_write_space(sk); 2473c4d7559SDave Watson } 2483c4d7559SDave Watson 24915a7dea7SJakub Kicinski /** 25015a7dea7SJakub Kicinski * tls_ctx_free() - free TLS ULP context 25115a7dea7SJakub Kicinski * @sk: socket to with @ctx is attached 25215a7dea7SJakub Kicinski * @ctx: TLS context structure 25315a7dea7SJakub Kicinski * 25415a7dea7SJakub Kicinski * Free TLS context. If @sk is %NULL caller guarantees that the socket 25515a7dea7SJakub Kicinski * to which @ctx was attached has no outstanding references. 25615a7dea7SJakub Kicinski */ 25715a7dea7SJakub Kicinski void tls_ctx_free(struct sock *sk, struct tls_context *ctx) 25886029d10SSabrina Dubroca { 25986029d10SSabrina Dubroca if (!ctx) 26086029d10SSabrina Dubroca return; 26186029d10SSabrina Dubroca 26286029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); 26386029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); 26479ffe608SJakub Kicinski mutex_destroy(&ctx->tx_lock); 26515a7dea7SJakub Kicinski 26615a7dea7SJakub Kicinski if (sk) 26715a7dea7SJakub Kicinski kfree_rcu(ctx, rcu); 26815a7dea7SJakub Kicinski else 26986029d10SSabrina Dubroca kfree(ctx); 27086029d10SSabrina Dubroca } 27186029d10SSabrina Dubroca 272313ab004SJohn Fastabend static void tls_sk_proto_cleanup(struct sock *sk, 273313ab004SJohn Fastabend struct tls_context *ctx, long timeo) 2743c4d7559SDave Watson { 2759354544cSDirk van der Merwe if (unlikely(sk->sk_write_pending) && 2769354544cSDirk van der Merwe !wait_on_pending_writer(sk, &timeo)) 2773c4d7559SDave Watson tls_handle_open_record(sk, 0); 2783c4d7559SDave Watson 279f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 280f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 281dbe42559SDave Watson kfree(ctx->tx.rec_seq); 282dbe42559SDave Watson kfree(ctx->tx.iv); 283313ab004SJohn Fastabend tls_sw_release_resources_tx(sk); 284b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); 28535b71a34SJakub Kicinski } else if (ctx->tx_conf == TLS_HW) { 28635b71a34SJakub Kicinski tls_device_free_resources_tx(sk); 287b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); 288f66de3eeSBoris Pismenny } 289f66de3eeSBoris Pismenny 290b32fd3ccSJakub Kicinski if (ctx->rx_conf == TLS_SW) { 291313ab004SJohn Fastabend tls_sw_release_resources_rx(sk); 292b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); 293b32fd3ccSJakub Kicinski } else if (ctx->rx_conf == TLS_HW) { 2944799ac81SBoris Pismenny tls_device_offload_cleanup_rx(sk); 295b32fd3ccSJakub Kicinski TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); 296b32fd3ccSJakub Kicinski } 297e8f69799SIlya Lesokhin } 298e8f69799SIlya Lesokhin 299313ab004SJohn Fastabend static void tls_sk_proto_close(struct sock *sk, long timeout) 300313ab004SJohn Fastabend { 30195fa1454SJohn Fastabend struct inet_connection_sock *icsk = inet_csk(sk); 302313ab004SJohn Fastabend struct tls_context *ctx = tls_get_ctx(sk); 303313ab004SJohn Fastabend long timeo = sock_sndtimeo(sk, 0); 304313ab004SJohn Fastabend bool free_ctx; 305313ab004SJohn Fastabend 306313ab004SJohn Fastabend if (ctx->tx_conf == TLS_SW) 307313ab004SJohn Fastabend tls_sw_cancel_work_tx(ctx); 308313ab004SJohn Fastabend 309313ab004SJohn Fastabend lock_sock(sk); 310313ab004SJohn Fastabend free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW; 311313ab004SJohn Fastabend 312313ab004SJohn Fastabend if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE) 313313ab004SJohn Fastabend tls_sk_proto_cleanup(sk, ctx, timeo); 314313ab004SJohn Fastabend 31595fa1454SJohn Fastabend write_lock_bh(&sk->sk_callback_lock); 31695fa1454SJohn Fastabend if (free_ctx) 31715a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, NULL); 318d5bee737SJakub Sitnicki WRITE_ONCE(sk->sk_prot, ctx->sk_proto); 319d85f0177SJohn Fastabend if (sk->sk_write_space == tls_write_space) 32057c722e9SJakub Kicinski sk->sk_write_space = ctx->sk_write_space; 32195fa1454SJohn Fastabend write_unlock_bh(&sk->sk_callback_lock); 3223c4d7559SDave Watson release_sock(sk); 323313ab004SJohn Fastabend if (ctx->tx_conf == TLS_SW) 324313ab004SJohn Fastabend tls_sw_free_ctx_tx(ctx); 325313ab004SJohn Fastabend if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) 326313ab004SJohn Fastabend tls_sw_strparser_done(ctx); 327313ab004SJohn Fastabend if (ctx->rx_conf == TLS_SW) 328313ab004SJohn Fastabend tls_sw_free_ctx_rx(ctx); 329be7bbea1SJakub Kicinski ctx->sk_proto->close(sk, timeout); 330313ab004SJohn Fastabend 33198f0a395SEric Dumazet if (free_ctx) 33215a7dea7SJakub Kicinski tls_ctx_free(sk, ctx); 3333c4d7559SDave Watson } 3343c4d7559SDave Watson 335ffa81fa4SYutaro Hayakawa static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval, 336ffa81fa4SYutaro Hayakawa int __user *optlen, int tx) 3373c4d7559SDave Watson { 3383c4d7559SDave Watson int rc = 0; 3393c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3403c4d7559SDave Watson struct tls_crypto_info *crypto_info; 341ffa81fa4SYutaro Hayakawa struct cipher_context *cctx; 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 */ 358ffa81fa4SYutaro Hayakawa if (tx) { 35986029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 360ffa81fa4SYutaro Hayakawa cctx = &ctx->tx; 361ffa81fa4SYutaro Hayakawa } else { 362ffa81fa4SYutaro Hayakawa crypto_info = &ctx->crypto_recv.info; 363ffa81fa4SYutaro Hayakawa cctx = &ctx->rx; 364ffa81fa4SYutaro Hayakawa } 3653c4d7559SDave Watson 3663c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3673c4d7559SDave Watson rc = -EBUSY; 3683c4d7559SDave Watson goto out; 3693c4d7559SDave Watson } 3703c4d7559SDave Watson 3715a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 372ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 373ac55cd61SDan Carpenter rc = -EFAULT; 3743c4d7559SDave Watson goto out; 3753c4d7559SDave Watson } 3763c4d7559SDave Watson 3773c4d7559SDave Watson switch (crypto_info->cipher_type) { 3783c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3793c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3803c4d7559SDave Watson crypto_info_aes_gcm_128 = 3813c4d7559SDave Watson container_of(crypto_info, 3823c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3833c4d7559SDave Watson info); 3843c4d7559SDave Watson 3853c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3863c4d7559SDave Watson rc = -EINVAL; 3873c4d7559SDave Watson goto out; 3883c4d7559SDave Watson } 3893c4d7559SDave Watson lock_sock(sk); 390a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 391ffa81fa4SYutaro Hayakawa cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3923c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 393ffa81fa4SYutaro Hayakawa memcpy(crypto_info_aes_gcm_128->rec_seq, cctx->rec_seq, 394c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3953c4d7559SDave Watson release_sock(sk); 396ac55cd61SDan Carpenter if (copy_to_user(optval, 3973c4d7559SDave Watson crypto_info_aes_gcm_128, 398ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 399ac55cd61SDan Carpenter rc = -EFAULT; 4003c4d7559SDave Watson break; 4013c4d7559SDave Watson } 402fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 403fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256 * 404fb99bce7SDave Watson crypto_info_aes_gcm_256 = 405fb99bce7SDave Watson container_of(crypto_info, 406fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256, 407fb99bce7SDave Watson info); 408fb99bce7SDave Watson 409fb99bce7SDave Watson if (len != sizeof(*crypto_info_aes_gcm_256)) { 410fb99bce7SDave Watson rc = -EINVAL; 411fb99bce7SDave Watson goto out; 412fb99bce7SDave Watson } 413fb99bce7SDave Watson lock_sock(sk); 414fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->iv, 415ffa81fa4SYutaro Hayakawa cctx->iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, 416fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_IV_SIZE); 417ffa81fa4SYutaro Hayakawa memcpy(crypto_info_aes_gcm_256->rec_seq, cctx->rec_seq, 418fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); 419fb99bce7SDave Watson release_sock(sk); 420fb99bce7SDave Watson if (copy_to_user(optval, 421fb99bce7SDave Watson crypto_info_aes_gcm_256, 422fb99bce7SDave Watson sizeof(*crypto_info_aes_gcm_256))) 423fb99bce7SDave Watson rc = -EFAULT; 424fb99bce7SDave Watson break; 425fb99bce7SDave Watson } 4263fb59a5dSTianjia Zhang case TLS_CIPHER_AES_CCM_128: { 4273fb59a5dSTianjia Zhang struct tls12_crypto_info_aes_ccm_128 *aes_ccm_128 = 4283fb59a5dSTianjia Zhang container_of(crypto_info, 4293fb59a5dSTianjia Zhang struct tls12_crypto_info_aes_ccm_128, info); 4303fb59a5dSTianjia Zhang 4313fb59a5dSTianjia Zhang if (len != sizeof(*aes_ccm_128)) { 4323fb59a5dSTianjia Zhang rc = -EINVAL; 4333fb59a5dSTianjia Zhang goto out; 4343fb59a5dSTianjia Zhang } 4353fb59a5dSTianjia Zhang lock_sock(sk); 4363fb59a5dSTianjia Zhang memcpy(aes_ccm_128->iv, 4373fb59a5dSTianjia Zhang cctx->iv + TLS_CIPHER_AES_CCM_128_SALT_SIZE, 4383fb59a5dSTianjia Zhang TLS_CIPHER_AES_CCM_128_IV_SIZE); 4393fb59a5dSTianjia Zhang memcpy(aes_ccm_128->rec_seq, cctx->rec_seq, 4403fb59a5dSTianjia Zhang TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE); 4413fb59a5dSTianjia Zhang release_sock(sk); 4423fb59a5dSTianjia Zhang if (copy_to_user(optval, aes_ccm_128, sizeof(*aes_ccm_128))) 4433fb59a5dSTianjia Zhang rc = -EFAULT; 4443fb59a5dSTianjia Zhang break; 4453fb59a5dSTianjia Zhang } 4463fb59a5dSTianjia Zhang case TLS_CIPHER_CHACHA20_POLY1305: { 4473fb59a5dSTianjia Zhang struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305 = 4483fb59a5dSTianjia Zhang container_of(crypto_info, 4493fb59a5dSTianjia Zhang struct tls12_crypto_info_chacha20_poly1305, 4503fb59a5dSTianjia Zhang info); 4513fb59a5dSTianjia Zhang 4523fb59a5dSTianjia Zhang if (len != sizeof(*chacha20_poly1305)) { 4533fb59a5dSTianjia Zhang rc = -EINVAL; 4543fb59a5dSTianjia Zhang goto out; 4553fb59a5dSTianjia Zhang } 4563fb59a5dSTianjia Zhang lock_sock(sk); 4573fb59a5dSTianjia Zhang memcpy(chacha20_poly1305->iv, 4583fb59a5dSTianjia Zhang cctx->iv + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE, 4593fb59a5dSTianjia Zhang TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE); 4603fb59a5dSTianjia Zhang memcpy(chacha20_poly1305->rec_seq, cctx->rec_seq, 4613fb59a5dSTianjia Zhang TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE); 4623fb59a5dSTianjia Zhang release_sock(sk); 4633fb59a5dSTianjia Zhang if (copy_to_user(optval, chacha20_poly1305, 4643fb59a5dSTianjia Zhang sizeof(*chacha20_poly1305))) 4653fb59a5dSTianjia Zhang rc = -EFAULT; 4663fb59a5dSTianjia Zhang break; 4673fb59a5dSTianjia Zhang } 468227b9644STianjia Zhang case TLS_CIPHER_SM4_GCM: { 469227b9644STianjia Zhang struct tls12_crypto_info_sm4_gcm *sm4_gcm_info = 470227b9644STianjia Zhang container_of(crypto_info, 471227b9644STianjia Zhang struct tls12_crypto_info_sm4_gcm, info); 472227b9644STianjia Zhang 473227b9644STianjia Zhang if (len != sizeof(*sm4_gcm_info)) { 474227b9644STianjia Zhang rc = -EINVAL; 475227b9644STianjia Zhang goto out; 476227b9644STianjia Zhang } 477227b9644STianjia Zhang lock_sock(sk); 478227b9644STianjia Zhang memcpy(sm4_gcm_info->iv, 479227b9644STianjia Zhang cctx->iv + TLS_CIPHER_SM4_GCM_SALT_SIZE, 480227b9644STianjia Zhang TLS_CIPHER_SM4_GCM_IV_SIZE); 481227b9644STianjia Zhang memcpy(sm4_gcm_info->rec_seq, cctx->rec_seq, 482227b9644STianjia Zhang TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE); 483227b9644STianjia Zhang release_sock(sk); 484227b9644STianjia Zhang if (copy_to_user(optval, sm4_gcm_info, sizeof(*sm4_gcm_info))) 485227b9644STianjia Zhang rc = -EFAULT; 486227b9644STianjia Zhang break; 487227b9644STianjia Zhang } 488227b9644STianjia Zhang case TLS_CIPHER_SM4_CCM: { 489227b9644STianjia Zhang struct tls12_crypto_info_sm4_ccm *sm4_ccm_info = 490227b9644STianjia Zhang container_of(crypto_info, 491227b9644STianjia Zhang struct tls12_crypto_info_sm4_ccm, info); 492227b9644STianjia Zhang 493227b9644STianjia Zhang if (len != sizeof(*sm4_ccm_info)) { 494227b9644STianjia Zhang rc = -EINVAL; 495227b9644STianjia Zhang goto out; 496227b9644STianjia Zhang } 497227b9644STianjia Zhang lock_sock(sk); 498227b9644STianjia Zhang memcpy(sm4_ccm_info->iv, 499227b9644STianjia Zhang cctx->iv + TLS_CIPHER_SM4_CCM_SALT_SIZE, 500227b9644STianjia Zhang TLS_CIPHER_SM4_CCM_IV_SIZE); 501227b9644STianjia Zhang memcpy(sm4_ccm_info->rec_seq, cctx->rec_seq, 502227b9644STianjia Zhang TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE); 503227b9644STianjia Zhang release_sock(sk); 504227b9644STianjia Zhang if (copy_to_user(optval, sm4_ccm_info, sizeof(*sm4_ccm_info))) 505227b9644STianjia Zhang rc = -EFAULT; 506227b9644STianjia Zhang break; 507227b9644STianjia Zhang } 5083c4d7559SDave Watson default: 5093c4d7559SDave Watson rc = -EINVAL; 5103c4d7559SDave Watson } 5113c4d7559SDave Watson 5123c4d7559SDave Watson out: 5133c4d7559SDave Watson return rc; 5143c4d7559SDave Watson } 5153c4d7559SDave Watson 516*c1318b39SBoris Pismenny static int do_tls_getsockopt_tx_zc(struct sock *sk, char __user *optval, 517*c1318b39SBoris Pismenny int __user *optlen) 518*c1318b39SBoris Pismenny { 519*c1318b39SBoris Pismenny struct tls_context *ctx = tls_get_ctx(sk); 520*c1318b39SBoris Pismenny unsigned int value; 521*c1318b39SBoris Pismenny int len; 522*c1318b39SBoris Pismenny 523*c1318b39SBoris Pismenny if (get_user(len, optlen)) 524*c1318b39SBoris Pismenny return -EFAULT; 525*c1318b39SBoris Pismenny 526*c1318b39SBoris Pismenny if (len != sizeof(value)) 527*c1318b39SBoris Pismenny return -EINVAL; 528*c1318b39SBoris Pismenny 529*c1318b39SBoris Pismenny value = ctx->zerocopy_sendfile; 530*c1318b39SBoris Pismenny if (copy_to_user(optval, &value, sizeof(value))) 531*c1318b39SBoris Pismenny return -EFAULT; 532*c1318b39SBoris Pismenny 533*c1318b39SBoris Pismenny return 0; 534*c1318b39SBoris Pismenny } 535*c1318b39SBoris Pismenny 5363c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 5373c4d7559SDave Watson char __user *optval, int __user *optlen) 5383c4d7559SDave Watson { 5393c4d7559SDave Watson int rc = 0; 5403c4d7559SDave Watson 5413c4d7559SDave Watson switch (optname) { 5423c4d7559SDave Watson case TLS_TX: 543ffa81fa4SYutaro Hayakawa case TLS_RX: 544ffa81fa4SYutaro Hayakawa rc = do_tls_getsockopt_conf(sk, optval, optlen, 545ffa81fa4SYutaro Hayakawa optname == TLS_TX); 5463c4d7559SDave Watson break; 547*c1318b39SBoris Pismenny case TLS_TX_ZEROCOPY_SENDFILE: 548*c1318b39SBoris Pismenny rc = do_tls_getsockopt_tx_zc(sk, optval, optlen); 549*c1318b39SBoris Pismenny break; 5503c4d7559SDave Watson default: 5513c4d7559SDave Watson rc = -ENOPROTOOPT; 5523c4d7559SDave Watson break; 5533c4d7559SDave Watson } 5543c4d7559SDave Watson return rc; 5553c4d7559SDave Watson } 5563c4d7559SDave Watson 5573c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 5583c4d7559SDave Watson char __user *optval, int __user *optlen) 5593c4d7559SDave Watson { 5603c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 5613c4d7559SDave Watson 5623c4d7559SDave Watson if (level != SOL_TLS) 563be7bbea1SJakub Kicinski return ctx->sk_proto->getsockopt(sk, level, 564be7bbea1SJakub Kicinski optname, optval, optlen); 5653c4d7559SDave Watson 5663c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 5673c4d7559SDave Watson } 5683c4d7559SDave Watson 569a7b75c5aSChristoph Hellwig static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval, 570c46234ebSDave Watson unsigned int optlen, int tx) 5713c4d7559SDave Watson { 572196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 5734509de14SVakul Garg struct tls_crypto_info *alt_crypto_info; 5743c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 575fb99bce7SDave Watson size_t optsize; 5763c4d7559SDave Watson int rc = 0; 57758371585SDave Watson int conf; 5783c4d7559SDave Watson 5791ddcbfbfSZiyang Xuan if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) 5801ddcbfbfSZiyang Xuan return -EINVAL; 5813c4d7559SDave Watson 5824509de14SVakul Garg if (tx) { 58386029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 5844509de14SVakul Garg alt_crypto_info = &ctx->crypto_recv.info; 5854509de14SVakul Garg } else { 58686029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 5874509de14SVakul Garg alt_crypto_info = &ctx->crypto_send.info; 5884509de14SVakul Garg } 589c46234ebSDave Watson 590196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 5911ddcbfbfSZiyang Xuan if (TLS_CRYPTO_INFO_READY(crypto_info)) 5921ddcbfbfSZiyang Xuan return -EBUSY; 593196c31b4SIlya Lesokhin 594a7b75c5aSChristoph Hellwig rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info)); 5953c4d7559SDave Watson if (rc) { 5963c4d7559SDave Watson rc = -EFAULT; 597257082e6SBoris Pismenny goto err_crypto_info; 5983c4d7559SDave Watson } 5993c4d7559SDave Watson 6003c4d7559SDave Watson /* check version */ 601130b392cSDave Watson if (crypto_info->version != TLS_1_2_VERSION && 602130b392cSDave Watson crypto_info->version != TLS_1_3_VERSION) { 6034a5cdc60SValentin Vidic rc = -EINVAL; 604196c31b4SIlya Lesokhin goto err_crypto_info; 6053c4d7559SDave Watson } 6063c4d7559SDave Watson 6074509de14SVakul Garg /* Ensure that TLS version and ciphers are same in both directions */ 6084509de14SVakul Garg if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { 6094509de14SVakul Garg if (alt_crypto_info->version != crypto_info->version || 6104509de14SVakul Garg alt_crypto_info->cipher_type != crypto_info->cipher_type) { 6114509de14SVakul Garg rc = -EINVAL; 6124509de14SVakul Garg goto err_crypto_info; 6134509de14SVakul Garg } 6144509de14SVakul Garg } 6154509de14SVakul Garg 616196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 617fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_128: 618f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_128); 619f295b3aeSVakul Garg break; 620fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 621f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_gcm_256); 622f295b3aeSVakul Garg break; 623f295b3aeSVakul Garg } 624f295b3aeSVakul Garg case TLS_CIPHER_AES_CCM_128: 625f295b3aeSVakul Garg optsize = sizeof(struct tls12_crypto_info_aes_ccm_128); 626f295b3aeSVakul Garg break; 62774ea6106SVadim Fedorenko case TLS_CIPHER_CHACHA20_POLY1305: 62874ea6106SVadim Fedorenko optsize = sizeof(struct tls12_crypto_info_chacha20_poly1305); 62974ea6106SVadim Fedorenko break; 630227b9644STianjia Zhang case TLS_CIPHER_SM4_GCM: 631227b9644STianjia Zhang optsize = sizeof(struct tls12_crypto_info_sm4_gcm); 632227b9644STianjia Zhang break; 633227b9644STianjia Zhang case TLS_CIPHER_SM4_CCM: 634227b9644STianjia Zhang optsize = sizeof(struct tls12_crypto_info_sm4_ccm); 635227b9644STianjia Zhang break; 636f295b3aeSVakul Garg default: 637f295b3aeSVakul Garg rc = -EINVAL; 638f295b3aeSVakul Garg goto err_crypto_info; 639f295b3aeSVakul Garg } 640f295b3aeSVakul Garg 641fb99bce7SDave Watson if (optlen != optsize) { 6423c4d7559SDave Watson rc = -EINVAL; 6436db959c8SSabrina Dubroca goto err_crypto_info; 6443c4d7559SDave Watson } 645f295b3aeSVakul Garg 646d3c48151SChristoph Hellwig rc = copy_from_sockptr_offset(crypto_info + 1, optval, 647d3c48151SChristoph Hellwig sizeof(*crypto_info), 648196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 6493c4d7559SDave Watson if (rc) { 6503c4d7559SDave Watson rc = -EFAULT; 6513c4d7559SDave Watson goto err_crypto_info; 6523c4d7559SDave Watson } 6533c4d7559SDave Watson 654c46234ebSDave Watson if (tx) { 655e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 656e8f69799SIlya Lesokhin conf = TLS_HW; 657b32fd3ccSJakub Kicinski if (!rc) { 658b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE); 659b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE); 660b32fd3ccSJakub Kicinski } else { 661c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 662318892acSJakub Kicinski if (rc) 663318892acSJakub Kicinski goto err_crypto_info; 664b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW); 665b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW); 666f66de3eeSBoris Pismenny conf = TLS_SW; 667e8f69799SIlya Lesokhin } 668c46234ebSDave Watson } else { 6694799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 6704799ac81SBoris Pismenny conf = TLS_HW; 671b32fd3ccSJakub Kicinski if (!rc) { 672b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE); 673b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE); 674b32fd3ccSJakub Kicinski } else { 675c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 676318892acSJakub Kicinski if (rc) 677318892acSJakub Kicinski goto err_crypto_info; 678b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW); 679b32fd3ccSJakub Kicinski TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW); 680f66de3eeSBoris Pismenny conf = TLS_SW; 681c46234ebSDave Watson } 682313ab004SJohn Fastabend tls_sw_strparser_arm(sk, ctx); 6834799ac81SBoris Pismenny } 684c46234ebSDave Watson 685f66de3eeSBoris Pismenny if (tx) 686f66de3eeSBoris Pismenny ctx->tx_conf = conf; 687f66de3eeSBoris Pismenny else 688f66de3eeSBoris Pismenny ctx->rx_conf = conf; 6896d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 690c46234ebSDave Watson if (tx) { 691ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 692ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 693c46234ebSDave Watson } 6941ddcbfbfSZiyang Xuan return 0; 6953c4d7559SDave Watson 6963c4d7559SDave Watson err_crypto_info: 697c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 6983c4d7559SDave Watson return rc; 6993c4d7559SDave Watson } 7003c4d7559SDave Watson 701*c1318b39SBoris Pismenny static int do_tls_setsockopt_tx_zc(struct sock *sk, sockptr_t optval, 702*c1318b39SBoris Pismenny unsigned int optlen) 703*c1318b39SBoris Pismenny { 704*c1318b39SBoris Pismenny struct tls_context *ctx = tls_get_ctx(sk); 705*c1318b39SBoris Pismenny unsigned int value; 706*c1318b39SBoris Pismenny 707*c1318b39SBoris Pismenny if (sockptr_is_null(optval) || optlen != sizeof(value)) 708*c1318b39SBoris Pismenny return -EINVAL; 709*c1318b39SBoris Pismenny 710*c1318b39SBoris Pismenny if (copy_from_sockptr(&value, optval, sizeof(value))) 711*c1318b39SBoris Pismenny return -EFAULT; 712*c1318b39SBoris Pismenny 713*c1318b39SBoris Pismenny if (value > 1) 714*c1318b39SBoris Pismenny return -EINVAL; 715*c1318b39SBoris Pismenny 716*c1318b39SBoris Pismenny ctx->zerocopy_sendfile = value; 717*c1318b39SBoris Pismenny 718*c1318b39SBoris Pismenny return 0; 719*c1318b39SBoris Pismenny } 720*c1318b39SBoris Pismenny 721a7b75c5aSChristoph Hellwig static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval, 722a7b75c5aSChristoph Hellwig unsigned int optlen) 7233c4d7559SDave Watson { 7243c4d7559SDave Watson int rc = 0; 7253c4d7559SDave Watson 7263c4d7559SDave Watson switch (optname) { 7273c4d7559SDave Watson case TLS_TX: 728c46234ebSDave Watson case TLS_RX: 7293c4d7559SDave Watson lock_sock(sk); 730c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 731c46234ebSDave Watson optname == TLS_TX); 7323c4d7559SDave Watson release_sock(sk); 7333c4d7559SDave Watson break; 734*c1318b39SBoris Pismenny case TLS_TX_ZEROCOPY_SENDFILE: 735*c1318b39SBoris Pismenny lock_sock(sk); 736*c1318b39SBoris Pismenny rc = do_tls_setsockopt_tx_zc(sk, optval, optlen); 737*c1318b39SBoris Pismenny release_sock(sk); 738*c1318b39SBoris Pismenny break; 7393c4d7559SDave Watson default: 7403c4d7559SDave Watson rc = -ENOPROTOOPT; 7413c4d7559SDave Watson break; 7423c4d7559SDave Watson } 7433c4d7559SDave Watson return rc; 7443c4d7559SDave Watson } 7453c4d7559SDave Watson 7463c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 747a7b75c5aSChristoph Hellwig sockptr_t optval, unsigned int optlen) 7483c4d7559SDave Watson { 7493c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 7503c4d7559SDave Watson 7513c4d7559SDave Watson if (level != SOL_TLS) 752be7bbea1SJakub Kicinski return ctx->sk_proto->setsockopt(sk, level, optname, optval, 753be7bbea1SJakub Kicinski optlen); 7543c4d7559SDave Watson 7553c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 7563c4d7559SDave Watson } 7573c4d7559SDave Watson 75808700dabSJakub Kicinski struct tls_context *tls_ctx_create(struct sock *sk) 759dd0bed16SAtul Gupta { 760dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 761dd0bed16SAtul Gupta struct tls_context *ctx; 762dd0bed16SAtul Gupta 763c6ec179aSGanesh Goudar ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); 764dd0bed16SAtul Gupta if (!ctx) 765dd0bed16SAtul Gupta return NULL; 766dd0bed16SAtul Gupta 76779ffe608SJakub Kicinski mutex_init(&ctx->tx_lock); 76815a7dea7SJakub Kicinski rcu_assign_pointer(icsk->icsk_ulp_data, ctx); 769d5bee737SJakub Sitnicki ctx->sk_proto = READ_ONCE(sk->sk_prot); 770c55dcdd4SMaxim Mikityanskiy ctx->sk = sk; 771dd0bed16SAtul Gupta return ctx; 772dd0bed16SAtul Gupta } 773dd0bed16SAtul Gupta 774f3911f73SJakub Kicinski static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 775f3911f73SJakub Kicinski const struct proto_ops *base) 776f3911f73SJakub Kicinski { 777f3911f73SJakub Kicinski ops[TLS_BASE][TLS_BASE] = *base; 778f3911f73SJakub Kicinski 779f3911f73SJakub Kicinski ops[TLS_SW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; 780f3911f73SJakub Kicinski ops[TLS_SW ][TLS_BASE].sendpage_locked = tls_sw_sendpage_locked; 781f3911f73SJakub Kicinski 782f3911f73SJakub Kicinski ops[TLS_BASE][TLS_SW ] = ops[TLS_BASE][TLS_BASE]; 783f3911f73SJakub Kicinski ops[TLS_BASE][TLS_SW ].splice_read = tls_sw_splice_read; 784f3911f73SJakub Kicinski 785f3911f73SJakub Kicinski ops[TLS_SW ][TLS_SW ] = ops[TLS_SW ][TLS_BASE]; 786f3911f73SJakub Kicinski ops[TLS_SW ][TLS_SW ].splice_read = tls_sw_splice_read; 787f3911f73SJakub Kicinski 788f3911f73SJakub Kicinski #ifdef CONFIG_TLS_DEVICE 789f3911f73SJakub Kicinski ops[TLS_HW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE]; 790f3911f73SJakub Kicinski ops[TLS_HW ][TLS_BASE].sendpage_locked = NULL; 791f3911f73SJakub Kicinski 792f3911f73SJakub Kicinski ops[TLS_HW ][TLS_SW ] = ops[TLS_BASE][TLS_SW ]; 793f3911f73SJakub Kicinski ops[TLS_HW ][TLS_SW ].sendpage_locked = NULL; 794f3911f73SJakub Kicinski 795f3911f73SJakub Kicinski ops[TLS_BASE][TLS_HW ] = ops[TLS_BASE][TLS_SW ]; 796f3911f73SJakub Kicinski 797f3911f73SJakub Kicinski ops[TLS_SW ][TLS_HW ] = ops[TLS_SW ][TLS_SW ]; 798f3911f73SJakub Kicinski 799f3911f73SJakub Kicinski ops[TLS_HW ][TLS_HW ] = ops[TLS_HW ][TLS_SW ]; 800f3911f73SJakub Kicinski ops[TLS_HW ][TLS_HW ].sendpage_locked = NULL; 801f3911f73SJakub Kicinski #endif 802f3911f73SJakub Kicinski #ifdef CONFIG_TLS_TOE 803f3911f73SJakub Kicinski ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 804f3911f73SJakub Kicinski #endif 805f3911f73SJakub Kicinski } 806f3911f73SJakub Kicinski 80763a6b3feSAtul Gupta static void tls_build_proto(struct sock *sk) 80863a6b3feSAtul Gupta { 80963a6b3feSAtul Gupta int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 8109a893949SWill Deacon struct proto *prot = READ_ONCE(sk->sk_prot); 81163a6b3feSAtul Gupta 81263a6b3feSAtul Gupta /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 81363a6b3feSAtul Gupta if (ip_ver == TLSV6 && 8145bb4c45dSJakub Sitnicki unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) { 81563a6b3feSAtul Gupta mutex_lock(&tcpv6_prot_mutex); 8165bb4c45dSJakub Sitnicki if (likely(prot != saved_tcpv6_prot)) { 8175bb4c45dSJakub Sitnicki build_protos(tls_prots[TLSV6], prot); 818f3911f73SJakub Kicinski build_proto_ops(tls_proto_ops[TLSV6], 819f3911f73SJakub Kicinski sk->sk_socket->ops); 8205bb4c45dSJakub Sitnicki smp_store_release(&saved_tcpv6_prot, prot); 82163a6b3feSAtul Gupta } 82263a6b3feSAtul Gupta mutex_unlock(&tcpv6_prot_mutex); 82363a6b3feSAtul Gupta } 82463a6b3feSAtul Gupta 82563a6b3feSAtul Gupta if (ip_ver == TLSV4 && 8265bb4c45dSJakub Sitnicki unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) { 82763a6b3feSAtul Gupta mutex_lock(&tcpv4_prot_mutex); 8285bb4c45dSJakub Sitnicki if (likely(prot != saved_tcpv4_prot)) { 8295bb4c45dSJakub Sitnicki build_protos(tls_prots[TLSV4], prot); 830f3911f73SJakub Kicinski build_proto_ops(tls_proto_ops[TLSV4], 831f3911f73SJakub Kicinski sk->sk_socket->ops); 8325bb4c45dSJakub Sitnicki smp_store_release(&saved_tcpv4_prot, prot); 83363a6b3feSAtul Gupta } 83463a6b3feSAtul Gupta mutex_unlock(&tcpv4_prot_mutex); 83563a6b3feSAtul Gupta } 83663a6b3feSAtul Gupta } 83763a6b3feSAtul Gupta 838f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 839f13fe3e6SJakub Sitnicki const struct proto *base) 840c113187dSBoris Pismenny { 841f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 842f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 843f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 844f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 845c113187dSBoris Pismenny 846f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 847f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 848f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 849c46234ebSDave Watson 850f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 851f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 8527b50ecfcSCong Wang prot[TLS_BASE][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; 853f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 854c46234ebSDave Watson 855f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 856f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 8577b50ecfcSCong Wang prot[TLS_SW][TLS_SW].sock_is_readable = tls_sw_sock_is_readable; 858f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 859dd0bed16SAtul Gupta 860e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 861e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 862e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 863e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 864e8f69799SIlya Lesokhin 865e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 866e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 867e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 8684799ac81SBoris Pismenny 8694799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 8704799ac81SBoris Pismenny 8714799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 8724799ac81SBoris Pismenny 8734799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 874e8f69799SIlya Lesokhin #endif 87553b4414aSJakub Kicinski #ifdef CONFIG_TLS_TOE 876f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 8770eb8745eSJakub Kicinski prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash; 8780eb8745eSJakub Kicinski prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash; 87953b4414aSJakub Kicinski #endif 880c113187dSBoris Pismenny } 881c113187dSBoris Pismenny 8823c4d7559SDave Watson static int tls_init(struct sock *sk) 8833c4d7559SDave Watson { 8843c4d7559SDave Watson struct tls_context *ctx; 8853c4d7559SDave Watson int rc = 0; 8863c4d7559SDave Watson 88716bed0e6SJakub Kicinski tls_build_proto(sk); 88816bed0e6SJakub Kicinski 88953b4414aSJakub Kicinski #ifdef CONFIG_TLS_TOE 8900eb8745eSJakub Kicinski if (tls_toe_bypass(sk)) 89195fa1454SJohn Fastabend return 0; 89253b4414aSJakub Kicinski #endif 893dd0bed16SAtul Gupta 894d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 895d91c3e17SIlya Lesokhin * in ESTABLISHED state. 896d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 897d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 898d91c3e17SIlya Lesokhin * share the ulp context. 899d91c3e17SIlya Lesokhin */ 900d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 9014a5cdc60SValentin Vidic return -ENOTCONN; 902d91c3e17SIlya Lesokhin 9033c4d7559SDave Watson /* allocate tls context */ 90495fa1454SJohn Fastabend write_lock_bh(&sk->sk_callback_lock); 90508700dabSJakub Kicinski ctx = tls_ctx_create(sk); 9063c4d7559SDave Watson if (!ctx) { 9073c4d7559SDave Watson rc = -ENOMEM; 9083c4d7559SDave Watson goto out; 9093c4d7559SDave Watson } 9106d88207fSIlya Lesokhin 911f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 912f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 9136d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 9143c4d7559SDave Watson out: 91595fa1454SJohn Fastabend write_unlock_bh(&sk->sk_callback_lock); 9163c4d7559SDave Watson return rc; 9173c4d7559SDave Watson } 9183c4d7559SDave Watson 91933bfe20dSJohn Fastabend static void tls_update(struct sock *sk, struct proto *p, 92033bfe20dSJohn Fastabend void (*write_space)(struct sock *sk)) 92195fa1454SJohn Fastabend { 92295fa1454SJohn Fastabend struct tls_context *ctx; 92395fa1454SJohn Fastabend 92495fa1454SJohn Fastabend ctx = tls_get_ctx(sk); 92533bfe20dSJohn Fastabend if (likely(ctx)) { 92633bfe20dSJohn Fastabend ctx->sk_write_space = write_space; 92795fa1454SJohn Fastabend ctx->sk_proto = p; 92833bfe20dSJohn Fastabend } else { 929b8e202d1SJakub Sitnicki /* Pairs with lockless read in sk_clone_lock(). */ 930b8e202d1SJakub Sitnicki WRITE_ONCE(sk->sk_prot, p); 93133bfe20dSJohn Fastabend sk->sk_write_space = write_space; 93233bfe20dSJohn Fastabend } 93395fa1454SJohn Fastabend } 93495fa1454SJohn Fastabend 93526811cc9SDavide Caratti static int tls_get_info(const struct sock *sk, struct sk_buff *skb) 93626811cc9SDavide Caratti { 93726811cc9SDavide Caratti u16 version, cipher_type; 93826811cc9SDavide Caratti struct tls_context *ctx; 93926811cc9SDavide Caratti struct nlattr *start; 94026811cc9SDavide Caratti int err; 94126811cc9SDavide Caratti 94226811cc9SDavide Caratti start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS); 94326811cc9SDavide Caratti if (!start) 94426811cc9SDavide Caratti return -EMSGSIZE; 94526811cc9SDavide Caratti 94626811cc9SDavide Caratti rcu_read_lock(); 94726811cc9SDavide Caratti ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data); 94826811cc9SDavide Caratti if (!ctx) { 94926811cc9SDavide Caratti err = 0; 95026811cc9SDavide Caratti goto nla_failure; 95126811cc9SDavide Caratti } 95226811cc9SDavide Caratti version = ctx->prot_info.version; 95326811cc9SDavide Caratti if (version) { 95426811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_VERSION, version); 95526811cc9SDavide Caratti if (err) 95626811cc9SDavide Caratti goto nla_failure; 95726811cc9SDavide Caratti } 95826811cc9SDavide Caratti cipher_type = ctx->prot_info.cipher_type; 95926811cc9SDavide Caratti if (cipher_type) { 96026811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type); 96126811cc9SDavide Caratti if (err) 96226811cc9SDavide Caratti goto nla_failure; 96326811cc9SDavide Caratti } 96426811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true)); 96526811cc9SDavide Caratti if (err) 96626811cc9SDavide Caratti goto nla_failure; 96726811cc9SDavide Caratti 96826811cc9SDavide Caratti err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false)); 96926811cc9SDavide Caratti if (err) 97026811cc9SDavide Caratti goto nla_failure; 97126811cc9SDavide Caratti 972*c1318b39SBoris Pismenny if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) { 973*c1318b39SBoris Pismenny err = nla_put_flag(skb, TLS_INFO_ZC_SENDFILE); 974*c1318b39SBoris Pismenny if (err) 975*c1318b39SBoris Pismenny goto nla_failure; 976*c1318b39SBoris Pismenny } 977*c1318b39SBoris Pismenny 97826811cc9SDavide Caratti rcu_read_unlock(); 97926811cc9SDavide Caratti nla_nest_end(skb, start); 98026811cc9SDavide Caratti return 0; 98126811cc9SDavide Caratti 98226811cc9SDavide Caratti nla_failure: 98326811cc9SDavide Caratti rcu_read_unlock(); 98426811cc9SDavide Caratti nla_nest_cancel(skb, start); 98526811cc9SDavide Caratti return err; 98626811cc9SDavide Caratti } 98726811cc9SDavide Caratti 98826811cc9SDavide Caratti static size_t tls_get_info_size(const struct sock *sk) 98926811cc9SDavide Caratti { 99026811cc9SDavide Caratti size_t size = 0; 99126811cc9SDavide Caratti 99226811cc9SDavide Caratti size += nla_total_size(0) + /* INET_ULP_INFO_TLS */ 99326811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */ 99426811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */ 99526811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */ 99626811cc9SDavide Caratti nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */ 997*c1318b39SBoris Pismenny nla_total_size(0) + /* TLS_INFO_ZC_SENDFILE */ 99826811cc9SDavide Caratti 0; 99926811cc9SDavide Caratti 100026811cc9SDavide Caratti return size; 100126811cc9SDavide Caratti } 100226811cc9SDavide Caratti 1003d26b698dSJakub Kicinski static int __net_init tls_init_net(struct net *net) 1004d26b698dSJakub Kicinski { 1005d26b698dSJakub Kicinski int err; 1006d26b698dSJakub Kicinski 1007d26b698dSJakub Kicinski net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib); 1008d26b698dSJakub Kicinski if (!net->mib.tls_statistics) 1009d26b698dSJakub Kicinski return -ENOMEM; 1010d26b698dSJakub Kicinski 1011d26b698dSJakub Kicinski err = tls_proc_init(net); 1012d26b698dSJakub Kicinski if (err) 1013d26b698dSJakub Kicinski goto err_free_stats; 1014d26b698dSJakub Kicinski 1015d26b698dSJakub Kicinski return 0; 1016d26b698dSJakub Kicinski err_free_stats: 1017d26b698dSJakub Kicinski free_percpu(net->mib.tls_statistics); 1018d26b698dSJakub Kicinski return err; 1019d26b698dSJakub Kicinski } 1020d26b698dSJakub Kicinski 1021d26b698dSJakub Kicinski static void __net_exit tls_exit_net(struct net *net) 1022d26b698dSJakub Kicinski { 1023d26b698dSJakub Kicinski tls_proc_fini(net); 1024d26b698dSJakub Kicinski free_percpu(net->mib.tls_statistics); 1025d26b698dSJakub Kicinski } 1026d26b698dSJakub Kicinski 1027d26b698dSJakub Kicinski static struct pernet_operations tls_proc_ops = { 1028d26b698dSJakub Kicinski .init = tls_init_net, 1029d26b698dSJakub Kicinski .exit = tls_exit_net, 1030d26b698dSJakub Kicinski }; 1031d26b698dSJakub Kicinski 10323c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 10333c4d7559SDave Watson .name = "tls", 10343c4d7559SDave Watson .owner = THIS_MODULE, 10353c4d7559SDave Watson .init = tls_init, 103695fa1454SJohn Fastabend .update = tls_update, 103726811cc9SDavide Caratti .get_info = tls_get_info, 103826811cc9SDavide Caratti .get_info_size = tls_get_info_size, 10393c4d7559SDave Watson }; 10403c4d7559SDave Watson 10413c4d7559SDave Watson static int __init tls_register(void) 10423c4d7559SDave Watson { 1043d26b698dSJakub Kicinski int err; 1044d26b698dSJakub Kicinski 1045d26b698dSJakub Kicinski err = register_pernet_subsys(&tls_proc_ops); 1046d26b698dSJakub Kicinski if (err) 1047d26b698dSJakub Kicinski return err; 1048d26b698dSJakub Kicinski 1049e8f69799SIlya Lesokhin tls_device_init(); 10503c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 10513c4d7559SDave Watson 10523c4d7559SDave Watson return 0; 10533c4d7559SDave Watson } 10543c4d7559SDave Watson 10553c4d7559SDave Watson static void __exit tls_unregister(void) 10563c4d7559SDave Watson { 10573c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 1058e8f69799SIlya Lesokhin tls_device_cleanup(); 1059d26b698dSJakub Kicinski unregister_pernet_subsys(&tls_proc_ops); 10603c4d7559SDave Watson } 10613c4d7559SDave Watson 10623c4d7559SDave Watson module_init(tls_register); 10633c4d7559SDave Watson module_exit(tls_unregister); 1064