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> 413c4d7559SDave Watson 423c4d7559SDave Watson #include <net/tls.h> 433c4d7559SDave Watson 443c4d7559SDave Watson MODULE_AUTHOR("Mellanox Technologies"); 453c4d7559SDave Watson MODULE_DESCRIPTION("Transport Layer Security Support"); 463c4d7559SDave Watson MODULE_LICENSE("Dual BSD/GPL"); 473c4d7559SDave Watson 486d88207fSIlya Lesokhin enum { 49c113187dSBoris Pismenny TLSV4, 50c113187dSBoris Pismenny TLSV6, 51c113187dSBoris Pismenny TLS_NUM_PROTS, 52c113187dSBoris Pismenny }; 53c113187dSBoris Pismenny 54c113187dSBoris Pismenny enum { 5558371585SDave Watson TLS_BASE, 566d88207fSIlya Lesokhin TLS_SW_TX, 57c46234ebSDave Watson TLS_SW_RX, 58c46234ebSDave Watson TLS_SW_RXTX, 596d88207fSIlya Lesokhin TLS_NUM_CONFIG, 606d88207fSIlya Lesokhin }; 616d88207fSIlya Lesokhin 62c113187dSBoris Pismenny static struct proto *saved_tcpv6_prot; 63c113187dSBoris Pismenny static DEFINE_MUTEX(tcpv6_prot_mutex); 64c113187dSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG]; 65c46234ebSDave Watson static struct proto_ops tls_sw_proto_ops; 666d88207fSIlya Lesokhin 676d88207fSIlya Lesokhin static inline void update_sk_prot(struct sock *sk, struct tls_context *ctx) 686d88207fSIlya Lesokhin { 69c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 70c113187dSBoris Pismenny 7158371585SDave Watson sk->sk_prot = &tls_prots[ip_ver][ctx->conf]; 726d88207fSIlya Lesokhin } 733c4d7559SDave Watson 743c4d7559SDave Watson int wait_on_pending_writer(struct sock *sk, long *timeo) 753c4d7559SDave Watson { 763c4d7559SDave Watson int rc = 0; 773c4d7559SDave Watson DEFINE_WAIT_FUNC(wait, woken_wake_function); 783c4d7559SDave Watson 793c4d7559SDave Watson add_wait_queue(sk_sleep(sk), &wait); 803c4d7559SDave Watson while (1) { 813c4d7559SDave Watson if (!*timeo) { 823c4d7559SDave Watson rc = -EAGAIN; 833c4d7559SDave Watson break; 843c4d7559SDave Watson } 853c4d7559SDave Watson 863c4d7559SDave Watson if (signal_pending(current)) { 873c4d7559SDave Watson rc = sock_intr_errno(*timeo); 883c4d7559SDave Watson break; 893c4d7559SDave Watson } 903c4d7559SDave Watson 913c4d7559SDave Watson if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) 923c4d7559SDave Watson break; 933c4d7559SDave Watson } 943c4d7559SDave Watson remove_wait_queue(sk_sleep(sk), &wait); 953c4d7559SDave Watson return rc; 963c4d7559SDave Watson } 973c4d7559SDave Watson 983c4d7559SDave Watson int tls_push_sg(struct sock *sk, 993c4d7559SDave Watson struct tls_context *ctx, 1003c4d7559SDave Watson struct scatterlist *sg, 1013c4d7559SDave Watson u16 first_offset, 1023c4d7559SDave Watson int flags) 1033c4d7559SDave Watson { 1043c4d7559SDave Watson int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; 1053c4d7559SDave Watson int ret = 0; 1063c4d7559SDave Watson struct page *p; 1073c4d7559SDave Watson size_t size; 1083c4d7559SDave Watson int offset = first_offset; 1093c4d7559SDave Watson 1103c4d7559SDave Watson size = sg->length - offset; 1113c4d7559SDave Watson offset += sg->offset; 1123c4d7559SDave Watson 1133c4d7559SDave Watson while (1) { 1143c4d7559SDave Watson if (sg_is_last(sg)) 1153c4d7559SDave Watson sendpage_flags = flags; 1163c4d7559SDave Watson 1173c4d7559SDave Watson /* is sending application-limited? */ 1183c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1193c4d7559SDave Watson p = sg_page(sg); 1203c4d7559SDave Watson retry: 1213c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1223c4d7559SDave Watson 1233c4d7559SDave Watson if (ret != size) { 1243c4d7559SDave Watson if (ret > 0) { 1253c4d7559SDave Watson offset += ret; 1263c4d7559SDave Watson size -= ret; 1273c4d7559SDave Watson goto retry; 1283c4d7559SDave Watson } 1293c4d7559SDave Watson 1303c4d7559SDave Watson offset -= sg->offset; 1313c4d7559SDave Watson ctx->partially_sent_offset = offset; 1323c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 1333c4d7559SDave Watson return ret; 1343c4d7559SDave Watson } 1353c4d7559SDave Watson 1363c4d7559SDave Watson put_page(p); 1373c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1383c4d7559SDave Watson sg = sg_next(sg); 1393c4d7559SDave Watson if (!sg) 1403c4d7559SDave Watson break; 1413c4d7559SDave Watson 1423c4d7559SDave Watson offset = sg->offset; 1433c4d7559SDave Watson size = sg->length; 1443c4d7559SDave Watson } 1453c4d7559SDave Watson 1463c4d7559SDave Watson clear_bit(TLS_PENDING_CLOSED_RECORD, &ctx->flags); 1473c4d7559SDave Watson 1483c4d7559SDave Watson return 0; 1493c4d7559SDave Watson } 1503c4d7559SDave Watson 1513c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1523c4d7559SDave Watson { 1533c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1543c4d7559SDave Watson 1553c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1563c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1573c4d7559SDave Watson 1583c4d7559SDave Watson return 0; 1593c4d7559SDave Watson } 1603c4d7559SDave Watson 1613c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1623c4d7559SDave Watson unsigned char *record_type) 1633c4d7559SDave Watson { 1643c4d7559SDave Watson struct cmsghdr *cmsg; 1653c4d7559SDave Watson int rc = -EINVAL; 1663c4d7559SDave Watson 1673c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1683c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1693c4d7559SDave Watson return -EINVAL; 1703c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1713c4d7559SDave Watson continue; 1723c4d7559SDave Watson 1733c4d7559SDave Watson switch (cmsg->cmsg_type) { 1743c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1753c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1763c4d7559SDave Watson return -EINVAL; 1773c4d7559SDave Watson 1783c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1793c4d7559SDave Watson return -EINVAL; 1803c4d7559SDave Watson 1813c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1823c4d7559SDave Watson if (rc) 1833c4d7559SDave Watson return rc; 1843c4d7559SDave Watson 1853c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1863c4d7559SDave Watson rc = 0; 1873c4d7559SDave Watson break; 1883c4d7559SDave Watson default: 1893c4d7559SDave Watson return -EINVAL; 1903c4d7559SDave Watson } 1913c4d7559SDave Watson } 1923c4d7559SDave Watson 1933c4d7559SDave Watson return rc; 1943c4d7559SDave Watson } 1953c4d7559SDave Watson 1963c4d7559SDave Watson int tls_push_pending_closed_record(struct sock *sk, struct tls_context *ctx, 1973c4d7559SDave Watson int flags, long *timeo) 1983c4d7559SDave Watson { 1993c4d7559SDave Watson struct scatterlist *sg; 2003c4d7559SDave Watson u16 offset; 2013c4d7559SDave Watson 2023c4d7559SDave Watson if (!tls_is_partially_sent_record(ctx)) 2033c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 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 2123c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2133c4d7559SDave Watson { 2143c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2153c4d7559SDave Watson 2163c4d7559SDave Watson if (!sk->sk_write_pending && tls_is_pending_closed_record(ctx)) { 2173c4d7559SDave Watson gfp_t sk_allocation = sk->sk_allocation; 2183c4d7559SDave Watson int rc; 2193c4d7559SDave Watson long timeo = 0; 2203c4d7559SDave Watson 2213c4d7559SDave Watson sk->sk_allocation = GFP_ATOMIC; 2223c4d7559SDave Watson rc = tls_push_pending_closed_record(sk, ctx, 2233c4d7559SDave Watson MSG_DONTWAIT | 2243c4d7559SDave Watson MSG_NOSIGNAL, 2253c4d7559SDave Watson &timeo); 2263c4d7559SDave Watson sk->sk_allocation = sk_allocation; 2273c4d7559SDave Watson 2283c4d7559SDave Watson if (rc < 0) 2293c4d7559SDave Watson return; 2303c4d7559SDave Watson } 2313c4d7559SDave Watson 2323c4d7559SDave Watson ctx->sk_write_space(sk); 2333c4d7559SDave Watson } 2343c4d7559SDave Watson 2353c4d7559SDave Watson static void tls_sk_proto_close(struct sock *sk, long timeout) 2363c4d7559SDave Watson { 2373c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2383c4d7559SDave Watson long timeo = sock_sndtimeo(sk, 0); 2393c4d7559SDave Watson void (*sk_proto_close)(struct sock *sk, long timeout); 2403c4d7559SDave Watson 2413c4d7559SDave Watson lock_sock(sk); 242ff45d820SIlya Lesokhin sk_proto_close = ctx->sk_proto_close; 243ff45d820SIlya Lesokhin 24458371585SDave Watson if (ctx->conf == TLS_BASE) { 245ff45d820SIlya Lesokhin kfree(ctx); 246ff45d820SIlya Lesokhin goto skip_tx_cleanup; 247ff45d820SIlya Lesokhin } 2483c4d7559SDave Watson 2493c4d7559SDave Watson if (!tls_complete_pending_work(sk, ctx, 0, &timeo)) 2503c4d7559SDave Watson tls_handle_open_record(sk, 0); 2513c4d7559SDave Watson 2523c4d7559SDave Watson if (ctx->partially_sent_record) { 2533c4d7559SDave Watson struct scatterlist *sg = ctx->partially_sent_record; 2543c4d7559SDave Watson 2553c4d7559SDave Watson while (1) { 2563c4d7559SDave Watson put_page(sg_page(sg)); 2573c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 2583c4d7559SDave Watson 2593c4d7559SDave Watson if (sg_is_last(sg)) 2603c4d7559SDave Watson break; 2613c4d7559SDave Watson sg++; 2623c4d7559SDave Watson } 2633c4d7559SDave Watson } 264ff45d820SIlya Lesokhin 265dbe42559SDave Watson kfree(ctx->tx.rec_seq); 266dbe42559SDave Watson kfree(ctx->tx.iv); 267c46234ebSDave Watson kfree(ctx->rx.rec_seq); 268c46234ebSDave Watson kfree(ctx->rx.iv); 2693c4d7559SDave Watson 270c46234ebSDave Watson if (ctx->conf == TLS_SW_TX || 271c46234ebSDave Watson ctx->conf == TLS_SW_RX || 272c46234ebSDave Watson ctx->conf == TLS_SW_RXTX) { 273c46234ebSDave Watson tls_sw_free_resources(sk); 274c46234ebSDave Watson } 2753c4d7559SDave Watson 276ff45d820SIlya Lesokhin skip_tx_cleanup: 2773c4d7559SDave Watson release_sock(sk); 2783c4d7559SDave Watson sk_proto_close(sk, timeout); 2793c4d7559SDave Watson } 2803c4d7559SDave Watson 2813c4d7559SDave Watson static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, 2823c4d7559SDave Watson int __user *optlen) 2833c4d7559SDave Watson { 2843c4d7559SDave Watson int rc = 0; 2853c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2863c4d7559SDave Watson struct tls_crypto_info *crypto_info; 2873c4d7559SDave Watson int len; 2883c4d7559SDave Watson 2893c4d7559SDave Watson if (get_user(len, optlen)) 2903c4d7559SDave Watson return -EFAULT; 2913c4d7559SDave Watson 2923c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 2933c4d7559SDave Watson rc = -EINVAL; 2943c4d7559SDave Watson goto out; 2953c4d7559SDave Watson } 2963c4d7559SDave Watson 2973c4d7559SDave Watson if (!ctx) { 2983c4d7559SDave Watson rc = -EBUSY; 2993c4d7559SDave Watson goto out; 3003c4d7559SDave Watson } 3013c4d7559SDave Watson 3023c4d7559SDave Watson /* get user crypto info */ 3033c4d7559SDave Watson crypto_info = &ctx->crypto_send; 3043c4d7559SDave Watson 3053c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3063c4d7559SDave Watson rc = -EBUSY; 3073c4d7559SDave Watson goto out; 3083c4d7559SDave Watson } 3093c4d7559SDave Watson 3105a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 311ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 312ac55cd61SDan Carpenter rc = -EFAULT; 3133c4d7559SDave Watson goto out; 3143c4d7559SDave Watson } 3153c4d7559SDave Watson 3163c4d7559SDave Watson switch (crypto_info->cipher_type) { 3173c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3183c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3193c4d7559SDave Watson crypto_info_aes_gcm_128 = 3203c4d7559SDave Watson container_of(crypto_info, 3213c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3223c4d7559SDave Watson info); 3233c4d7559SDave Watson 3243c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3253c4d7559SDave Watson rc = -EINVAL; 3263c4d7559SDave Watson goto out; 3273c4d7559SDave Watson } 3283c4d7559SDave Watson lock_sock(sk); 329a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 330dbe42559SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3313c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 332dbe42559SDave Watson memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, 333c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3343c4d7559SDave Watson release_sock(sk); 335ac55cd61SDan Carpenter if (copy_to_user(optval, 3363c4d7559SDave Watson crypto_info_aes_gcm_128, 337ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 338ac55cd61SDan Carpenter rc = -EFAULT; 3393c4d7559SDave Watson break; 3403c4d7559SDave Watson } 3413c4d7559SDave Watson default: 3423c4d7559SDave Watson rc = -EINVAL; 3433c4d7559SDave Watson } 3443c4d7559SDave Watson 3453c4d7559SDave Watson out: 3463c4d7559SDave Watson return rc; 3473c4d7559SDave Watson } 3483c4d7559SDave Watson 3493c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 3503c4d7559SDave Watson char __user *optval, int __user *optlen) 3513c4d7559SDave Watson { 3523c4d7559SDave Watson int rc = 0; 3533c4d7559SDave Watson 3543c4d7559SDave Watson switch (optname) { 3553c4d7559SDave Watson case TLS_TX: 3563c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 3573c4d7559SDave Watson break; 3583c4d7559SDave Watson default: 3593c4d7559SDave Watson rc = -ENOPROTOOPT; 3603c4d7559SDave Watson break; 3613c4d7559SDave Watson } 3623c4d7559SDave Watson return rc; 3633c4d7559SDave Watson } 3643c4d7559SDave Watson 3653c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 3663c4d7559SDave Watson char __user *optval, int __user *optlen) 3673c4d7559SDave Watson { 3683c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3693c4d7559SDave Watson 3703c4d7559SDave Watson if (level != SOL_TLS) 3713c4d7559SDave Watson return ctx->getsockopt(sk, level, optname, optval, optlen); 3723c4d7559SDave Watson 3733c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 3743c4d7559SDave Watson } 3753c4d7559SDave Watson 376c46234ebSDave Watson static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, 377c46234ebSDave Watson unsigned int optlen, int tx) 3783c4d7559SDave Watson { 379196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 3803c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3813c4d7559SDave Watson int rc = 0; 38258371585SDave Watson int conf; 3833c4d7559SDave Watson 3843c4d7559SDave Watson if (!optval || (optlen < sizeof(*crypto_info))) { 3853c4d7559SDave Watson rc = -EINVAL; 3863c4d7559SDave Watson goto out; 3873c4d7559SDave Watson } 3883c4d7559SDave Watson 389c46234ebSDave Watson if (tx) 390196c31b4SIlya Lesokhin crypto_info = &ctx->crypto_send; 391c46234ebSDave Watson else 392c46234ebSDave Watson crypto_info = &ctx->crypto_recv; 393c46234ebSDave Watson 394196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 395877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 396877d17c7SSabrina Dubroca rc = -EBUSY; 397196c31b4SIlya Lesokhin goto out; 398877d17c7SSabrina Dubroca } 399196c31b4SIlya Lesokhin 400196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); 4013c4d7559SDave Watson if (rc) { 4023c4d7559SDave Watson rc = -EFAULT; 403257082e6SBoris Pismenny goto err_crypto_info; 4043c4d7559SDave Watson } 4053c4d7559SDave Watson 4063c4d7559SDave Watson /* check version */ 407196c31b4SIlya Lesokhin if (crypto_info->version != TLS_1_2_VERSION) { 4083c4d7559SDave Watson rc = -ENOTSUPP; 409196c31b4SIlya Lesokhin goto err_crypto_info; 4103c4d7559SDave Watson } 4113c4d7559SDave Watson 412196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 4133c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 4143c4d7559SDave Watson if (optlen != sizeof(struct tls12_crypto_info_aes_gcm_128)) { 4153c4d7559SDave Watson rc = -EINVAL; 4166db959c8SSabrina Dubroca goto err_crypto_info; 4173c4d7559SDave Watson } 418196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), 419196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 4203c4d7559SDave Watson if (rc) { 4213c4d7559SDave Watson rc = -EFAULT; 4223c4d7559SDave Watson goto err_crypto_info; 4233c4d7559SDave Watson } 4243c4d7559SDave Watson break; 4253c4d7559SDave Watson } 4263c4d7559SDave Watson default: 4273c4d7559SDave Watson rc = -EINVAL; 4286db959c8SSabrina Dubroca goto err_crypto_info; 4293c4d7559SDave Watson } 4303c4d7559SDave Watson 4313c4d7559SDave Watson /* currently SW is default, we will have ethtool in future */ 432c46234ebSDave Watson if (tx) { 433c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 434c46234ebSDave Watson if (ctx->conf == TLS_SW_RX) 435c46234ebSDave Watson conf = TLS_SW_RXTX; 436c46234ebSDave Watson else 43758371585SDave Watson conf = TLS_SW_TX; 438c46234ebSDave Watson } else { 439c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 440c46234ebSDave Watson if (ctx->conf == TLS_SW_TX) 441c46234ebSDave Watson conf = TLS_SW_RXTX; 442c46234ebSDave Watson else 443c46234ebSDave Watson conf = TLS_SW_RX; 444c46234ebSDave Watson } 445c46234ebSDave Watson 4463c4d7559SDave Watson if (rc) 4473c4d7559SDave Watson goto err_crypto_info; 4483c4d7559SDave Watson 44958371585SDave Watson ctx->conf = conf; 4506d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 451c46234ebSDave Watson if (tx) { 452ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 453ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 454c46234ebSDave Watson } else { 455c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 456c46234ebSDave Watson } 4573c4d7559SDave Watson goto out; 4583c4d7559SDave Watson 4593c4d7559SDave Watson err_crypto_info: 4603c4d7559SDave Watson memset(crypto_info, 0, sizeof(*crypto_info)); 4613c4d7559SDave Watson out: 4623c4d7559SDave Watson return rc; 4633c4d7559SDave Watson } 4643c4d7559SDave Watson 4653c4d7559SDave Watson static int do_tls_setsockopt(struct sock *sk, int optname, 4663c4d7559SDave Watson char __user *optval, unsigned int optlen) 4673c4d7559SDave Watson { 4683c4d7559SDave Watson int rc = 0; 4693c4d7559SDave Watson 4703c4d7559SDave Watson switch (optname) { 4713c4d7559SDave Watson case TLS_TX: 472c46234ebSDave Watson case TLS_RX: 4733c4d7559SDave Watson lock_sock(sk); 474c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 475c46234ebSDave Watson optname == TLS_TX); 4763c4d7559SDave Watson release_sock(sk); 4773c4d7559SDave Watson break; 4783c4d7559SDave Watson default: 4793c4d7559SDave Watson rc = -ENOPROTOOPT; 4803c4d7559SDave Watson break; 4813c4d7559SDave Watson } 4823c4d7559SDave Watson return rc; 4833c4d7559SDave Watson } 4843c4d7559SDave Watson 4853c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 4863c4d7559SDave Watson char __user *optval, unsigned int optlen) 4873c4d7559SDave Watson { 4883c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4893c4d7559SDave Watson 4903c4d7559SDave Watson if (level != SOL_TLS) 4913c4d7559SDave Watson return ctx->setsockopt(sk, level, optname, optval, optlen); 4923c4d7559SDave Watson 4933c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 4943c4d7559SDave Watson } 4953c4d7559SDave Watson 496c113187dSBoris Pismenny static void build_protos(struct proto *prot, struct proto *base) 497c113187dSBoris Pismenny { 49858371585SDave Watson prot[TLS_BASE] = *base; 49958371585SDave Watson prot[TLS_BASE].setsockopt = tls_setsockopt; 50058371585SDave Watson prot[TLS_BASE].getsockopt = tls_getsockopt; 50158371585SDave Watson prot[TLS_BASE].close = tls_sk_proto_close; 502c113187dSBoris Pismenny 50358371585SDave Watson prot[TLS_SW_TX] = prot[TLS_BASE]; 504c113187dSBoris Pismenny prot[TLS_SW_TX].sendmsg = tls_sw_sendmsg; 505c113187dSBoris Pismenny prot[TLS_SW_TX].sendpage = tls_sw_sendpage; 506c46234ebSDave Watson 507c46234ebSDave Watson prot[TLS_SW_RX] = prot[TLS_BASE]; 508c46234ebSDave Watson prot[TLS_SW_RX].recvmsg = tls_sw_recvmsg; 509c46234ebSDave Watson prot[TLS_SW_RX].close = tls_sk_proto_close; 510c46234ebSDave Watson 511c46234ebSDave Watson prot[TLS_SW_RXTX] = prot[TLS_SW_TX]; 512c46234ebSDave Watson prot[TLS_SW_RXTX].recvmsg = tls_sw_recvmsg; 513c46234ebSDave Watson prot[TLS_SW_RXTX].close = tls_sk_proto_close; 514c113187dSBoris Pismenny } 515c113187dSBoris Pismenny 5163c4d7559SDave Watson static int tls_init(struct sock *sk) 5173c4d7559SDave Watson { 518c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 5193c4d7559SDave Watson struct inet_connection_sock *icsk = inet_csk(sk); 5203c4d7559SDave Watson struct tls_context *ctx; 5213c4d7559SDave Watson int rc = 0; 5223c4d7559SDave Watson 523d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 524d91c3e17SIlya Lesokhin * in ESTABLISHED state. 525d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 526d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 527d91c3e17SIlya Lesokhin * share the ulp context. 528d91c3e17SIlya Lesokhin */ 529d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 530d91c3e17SIlya Lesokhin return -ENOTSUPP; 531d91c3e17SIlya Lesokhin 5323c4d7559SDave Watson /* allocate tls context */ 5333c4d7559SDave Watson ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 5343c4d7559SDave Watson if (!ctx) { 5353c4d7559SDave Watson rc = -ENOMEM; 5363c4d7559SDave Watson goto out; 5373c4d7559SDave Watson } 5383c4d7559SDave Watson icsk->icsk_ulp_data = ctx; 5393c4d7559SDave Watson ctx->setsockopt = sk->sk_prot->setsockopt; 5403c4d7559SDave Watson ctx->getsockopt = sk->sk_prot->getsockopt; 541ff45d820SIlya Lesokhin ctx->sk_proto_close = sk->sk_prot->close; 5426d88207fSIlya Lesokhin 543c113187dSBoris Pismenny /* Build IPv6 TLS whenever the address of tcpv6_prot changes */ 544c113187dSBoris Pismenny if (ip_ver == TLSV6 && 545c113187dSBoris Pismenny unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { 546c113187dSBoris Pismenny mutex_lock(&tcpv6_prot_mutex); 547c113187dSBoris Pismenny if (likely(sk->sk_prot != saved_tcpv6_prot)) { 548c113187dSBoris Pismenny build_protos(tls_prots[TLSV6], sk->sk_prot); 549c113187dSBoris Pismenny smp_store_release(&saved_tcpv6_prot, sk->sk_prot); 550c113187dSBoris Pismenny } 551c113187dSBoris Pismenny mutex_unlock(&tcpv6_prot_mutex); 552c113187dSBoris Pismenny } 553c113187dSBoris Pismenny 55458371585SDave Watson ctx->conf = TLS_BASE; 5556d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 5563c4d7559SDave Watson out: 5573c4d7559SDave Watson return rc; 5583c4d7559SDave Watson } 5593c4d7559SDave Watson 5603c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 5613c4d7559SDave Watson .name = "tls", 562b11a632cSJohn Fastabend .uid = TCP_ULP_TLS, 563b11a632cSJohn Fastabend .user_visible = true, 5643c4d7559SDave Watson .owner = THIS_MODULE, 5653c4d7559SDave Watson .init = tls_init, 5663c4d7559SDave Watson }; 5673c4d7559SDave Watson 5683c4d7559SDave Watson static int __init tls_register(void) 5693c4d7559SDave Watson { 570c113187dSBoris Pismenny build_protos(tls_prots[TLSV4], &tcp_prot); 5713c4d7559SDave Watson 572c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 573c46234ebSDave Watson tls_sw_proto_ops.poll = tls_sw_poll; 574c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 575c46234ebSDave Watson 5763c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 5773c4d7559SDave Watson 5783c4d7559SDave Watson return 0; 5793c4d7559SDave Watson } 5803c4d7559SDave Watson 5813c4d7559SDave Watson static void __exit tls_unregister(void) 5823c4d7559SDave Watson { 5833c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 5843c4d7559SDave Watson } 5853c4d7559SDave Watson 5863c4d7559SDave Watson module_init(tls_register); 5873c4d7559SDave Watson module_exit(tls_unregister); 588