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> 423c4d7559SDave Watson 433c4d7559SDave Watson #include <net/tls.h> 443c4d7559SDave Watson 453c4d7559SDave Watson MODULE_AUTHOR("Mellanox Technologies"); 463c4d7559SDave Watson MODULE_DESCRIPTION("Transport Layer Security Support"); 473c4d7559SDave Watson MODULE_LICENSE("Dual BSD/GPL"); 483c4d7559SDave Watson 496d88207fSIlya Lesokhin enum { 50c113187dSBoris Pismenny TLSV4, 51c113187dSBoris Pismenny TLSV6, 52c113187dSBoris Pismenny TLS_NUM_PROTS, 53c113187dSBoris Pismenny }; 54c113187dSBoris Pismenny enum { 5558371585SDave Watson TLS_BASE, 56f66de3eeSBoris Pismenny TLS_SW, 57e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 58e8f69799SIlya Lesokhin TLS_HW, 59e8f69799SIlya Lesokhin #endif 60dd0bed16SAtul Gupta TLS_HW_RECORD, 616d88207fSIlya Lesokhin TLS_NUM_CONFIG, 626d88207fSIlya Lesokhin }; 636d88207fSIlya Lesokhin 64c113187dSBoris Pismenny static struct proto *saved_tcpv6_prot; 65c113187dSBoris Pismenny static DEFINE_MUTEX(tcpv6_prot_mutex); 66dd0bed16SAtul Gupta static LIST_HEAD(device_list); 67dd0bed16SAtul Gupta static DEFINE_MUTEX(device_mutex); 68f66de3eeSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 69c46234ebSDave Watson static struct proto_ops tls_sw_proto_ops; 706d88207fSIlya Lesokhin 71f66de3eeSBoris Pismenny static void update_sk_prot(struct sock *sk, struct tls_context *ctx) 726d88207fSIlya Lesokhin { 73c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 74c113187dSBoris Pismenny 75f66de3eeSBoris Pismenny sk->sk_prot = &tls_prots[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 1173c4d7559SDave Watson while (1) { 1183c4d7559SDave Watson if (sg_is_last(sg)) 1193c4d7559SDave Watson sendpage_flags = flags; 1203c4d7559SDave Watson 1213c4d7559SDave Watson /* is sending application-limited? */ 1223c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1233c4d7559SDave Watson p = sg_page(sg); 1243c4d7559SDave Watson retry: 1253c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1263c4d7559SDave Watson 1273c4d7559SDave Watson if (ret != size) { 1283c4d7559SDave Watson if (ret > 0) { 1293c4d7559SDave Watson offset += ret; 1303c4d7559SDave Watson size -= ret; 1313c4d7559SDave Watson goto retry; 1323c4d7559SDave Watson } 1333c4d7559SDave Watson 1343c4d7559SDave Watson offset -= sg->offset; 1353c4d7559SDave Watson ctx->partially_sent_offset = offset; 1363c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 1373c4d7559SDave Watson return ret; 1383c4d7559SDave Watson } 1393c4d7559SDave Watson 1403c4d7559SDave Watson put_page(p); 1413c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1423c4d7559SDave Watson sg = sg_next(sg); 1433c4d7559SDave Watson if (!sg) 1443c4d7559SDave Watson break; 1453c4d7559SDave Watson 1463c4d7559SDave Watson offset = sg->offset; 1473c4d7559SDave Watson size = sg->length; 1483c4d7559SDave Watson } 1493c4d7559SDave Watson 1503c4d7559SDave Watson clear_bit(TLS_PENDING_CLOSED_RECORD, &ctx->flags); 1513c4d7559SDave Watson 1523c4d7559SDave Watson return 0; 1533c4d7559SDave Watson } 1543c4d7559SDave Watson 1553c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1563c4d7559SDave Watson { 1573c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1583c4d7559SDave Watson 1593c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1603c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1613c4d7559SDave Watson 1623c4d7559SDave Watson return 0; 1633c4d7559SDave Watson } 1643c4d7559SDave Watson 1653c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1663c4d7559SDave Watson unsigned char *record_type) 1673c4d7559SDave Watson { 1683c4d7559SDave Watson struct cmsghdr *cmsg; 1693c4d7559SDave Watson int rc = -EINVAL; 1703c4d7559SDave Watson 1713c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1723c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1733c4d7559SDave Watson return -EINVAL; 1743c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1753c4d7559SDave Watson continue; 1763c4d7559SDave Watson 1773c4d7559SDave Watson switch (cmsg->cmsg_type) { 1783c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1793c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1803c4d7559SDave Watson return -EINVAL; 1813c4d7559SDave Watson 1823c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1833c4d7559SDave Watson return -EINVAL; 1843c4d7559SDave Watson 1853c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1863c4d7559SDave Watson if (rc) 1873c4d7559SDave Watson return rc; 1883c4d7559SDave Watson 1893c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1903c4d7559SDave Watson rc = 0; 1913c4d7559SDave Watson break; 1923c4d7559SDave Watson default: 1933c4d7559SDave Watson return -EINVAL; 1943c4d7559SDave Watson } 1953c4d7559SDave Watson } 1963c4d7559SDave Watson 1973c4d7559SDave Watson return rc; 1983c4d7559SDave Watson } 1993c4d7559SDave Watson 2003c4d7559SDave Watson int tls_push_pending_closed_record(struct sock *sk, struct tls_context *ctx, 2013c4d7559SDave Watson int flags, long *timeo) 2023c4d7559SDave Watson { 2033c4d7559SDave Watson struct scatterlist *sg; 2043c4d7559SDave Watson u16 offset; 2053c4d7559SDave Watson 2063c4d7559SDave Watson if (!tls_is_partially_sent_record(ctx)) 2073c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 2083c4d7559SDave Watson 2093c4d7559SDave Watson sg = ctx->partially_sent_record; 2103c4d7559SDave Watson offset = ctx->partially_sent_offset; 2113c4d7559SDave Watson 2123c4d7559SDave Watson ctx->partially_sent_record = NULL; 2133c4d7559SDave Watson return tls_push_sg(sk, ctx, sg, offset, flags); 2143c4d7559SDave Watson } 2153c4d7559SDave Watson 2163c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2173c4d7559SDave Watson { 2183c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2193c4d7559SDave Watson 2203c4d7559SDave Watson if (!sk->sk_write_pending && tls_is_pending_closed_record(ctx)) { 2213c4d7559SDave Watson gfp_t sk_allocation = sk->sk_allocation; 2223c4d7559SDave Watson int rc; 2233c4d7559SDave Watson long timeo = 0; 2243c4d7559SDave Watson 2253c4d7559SDave Watson sk->sk_allocation = GFP_ATOMIC; 2263c4d7559SDave Watson rc = tls_push_pending_closed_record(sk, ctx, 2273c4d7559SDave Watson MSG_DONTWAIT | 2283c4d7559SDave Watson MSG_NOSIGNAL, 2293c4d7559SDave Watson &timeo); 2303c4d7559SDave Watson sk->sk_allocation = sk_allocation; 2313c4d7559SDave Watson 2323c4d7559SDave Watson if (rc < 0) 2333c4d7559SDave Watson return; 2343c4d7559SDave Watson } 2353c4d7559SDave Watson 2363c4d7559SDave Watson ctx->sk_write_space(sk); 2373c4d7559SDave Watson } 2383c4d7559SDave Watson 2393c4d7559SDave Watson static void tls_sk_proto_close(struct sock *sk, long timeout) 2403c4d7559SDave Watson { 2413c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2423c4d7559SDave Watson long timeo = sock_sndtimeo(sk, 0); 2433c4d7559SDave Watson void (*sk_proto_close)(struct sock *sk, long timeout); 2443c4d7559SDave Watson 2453c4d7559SDave Watson lock_sock(sk); 246ff45d820SIlya Lesokhin sk_proto_close = ctx->sk_proto_close; 247ff45d820SIlya Lesokhin 248f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_HW_RECORD && ctx->rx_conf == TLS_HW_RECORD) 249dd0bed16SAtul Gupta goto skip_tx_cleanup; 250dd0bed16SAtul Gupta 251f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_BASE && ctx->rx_conf == TLS_BASE) { 252ff45d820SIlya Lesokhin kfree(ctx); 253dd0bed16SAtul Gupta ctx = NULL; 254ff45d820SIlya Lesokhin goto skip_tx_cleanup; 255ff45d820SIlya Lesokhin } 2563c4d7559SDave Watson 2573c4d7559SDave Watson if (!tls_complete_pending_work(sk, ctx, 0, &timeo)) 2583c4d7559SDave Watson tls_handle_open_record(sk, 0); 2593c4d7559SDave Watson 2603c4d7559SDave Watson if (ctx->partially_sent_record) { 2613c4d7559SDave Watson struct scatterlist *sg = ctx->partially_sent_record; 2623c4d7559SDave Watson 2633c4d7559SDave Watson while (1) { 2643c4d7559SDave Watson put_page(sg_page(sg)); 2653c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 2663c4d7559SDave Watson 2673c4d7559SDave Watson if (sg_is_last(sg)) 2683c4d7559SDave Watson break; 2693c4d7559SDave Watson sg++; 2703c4d7559SDave Watson } 2713c4d7559SDave Watson } 272ff45d820SIlya Lesokhin 273f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 274f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 275dbe42559SDave Watson kfree(ctx->tx.rec_seq); 276dbe42559SDave Watson kfree(ctx->tx.iv); 277f66de3eeSBoris Pismenny tls_sw_free_resources_tx(sk); 278f66de3eeSBoris Pismenny } 279f66de3eeSBoris Pismenny 280f66de3eeSBoris Pismenny if (ctx->rx_conf == TLS_SW) { 281c46234ebSDave Watson kfree(ctx->rx.rec_seq); 282c46234ebSDave Watson kfree(ctx->rx.iv); 283f66de3eeSBoris Pismenny tls_sw_free_resources_rx(sk); 284c46234ebSDave Watson } 2853c4d7559SDave Watson 286e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 287e8f69799SIlya Lesokhin if (ctx->tx_conf != TLS_HW) { 288e8f69799SIlya Lesokhin #else 289e8f69799SIlya Lesokhin { 290e8f69799SIlya Lesokhin #endif 291e8f69799SIlya Lesokhin kfree(ctx); 292e8f69799SIlya Lesokhin ctx = NULL; 293e8f69799SIlya Lesokhin } 294e8f69799SIlya Lesokhin 295ff45d820SIlya Lesokhin skip_tx_cleanup: 2963c4d7559SDave Watson release_sock(sk); 2973c4d7559SDave Watson sk_proto_close(sk, timeout); 298dd0bed16SAtul Gupta /* free ctx for TLS_HW_RECORD, used by tcp_set_state 299dd0bed16SAtul Gupta * for sk->sk_prot->unhash [tls_hw_unhash] 300dd0bed16SAtul Gupta */ 301f66de3eeSBoris Pismenny if (ctx && ctx->tx_conf == TLS_HW_RECORD && 302f66de3eeSBoris Pismenny ctx->rx_conf == TLS_HW_RECORD) 303dd0bed16SAtul Gupta kfree(ctx); 3043c4d7559SDave Watson } 3053c4d7559SDave Watson 3063c4d7559SDave Watson static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, 3073c4d7559SDave Watson int __user *optlen) 3083c4d7559SDave Watson { 3093c4d7559SDave Watson int rc = 0; 3103c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3113c4d7559SDave Watson struct tls_crypto_info *crypto_info; 3123c4d7559SDave Watson int len; 3133c4d7559SDave Watson 3143c4d7559SDave Watson if (get_user(len, optlen)) 3153c4d7559SDave Watson return -EFAULT; 3163c4d7559SDave Watson 3173c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 3183c4d7559SDave Watson rc = -EINVAL; 3193c4d7559SDave Watson goto out; 3203c4d7559SDave Watson } 3213c4d7559SDave Watson 3223c4d7559SDave Watson if (!ctx) { 3233c4d7559SDave Watson rc = -EBUSY; 3243c4d7559SDave Watson goto out; 3253c4d7559SDave Watson } 3263c4d7559SDave Watson 3273c4d7559SDave Watson /* get user crypto info */ 3283c4d7559SDave Watson crypto_info = &ctx->crypto_send; 3293c4d7559SDave Watson 3303c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3313c4d7559SDave Watson rc = -EBUSY; 3323c4d7559SDave Watson goto out; 3333c4d7559SDave Watson } 3343c4d7559SDave Watson 3355a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 336ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 337ac55cd61SDan Carpenter rc = -EFAULT; 3383c4d7559SDave Watson goto out; 3393c4d7559SDave Watson } 3403c4d7559SDave Watson 3413c4d7559SDave Watson switch (crypto_info->cipher_type) { 3423c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3433c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3443c4d7559SDave Watson crypto_info_aes_gcm_128 = 3453c4d7559SDave Watson container_of(crypto_info, 3463c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3473c4d7559SDave Watson info); 3483c4d7559SDave Watson 3493c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3503c4d7559SDave Watson rc = -EINVAL; 3513c4d7559SDave Watson goto out; 3523c4d7559SDave Watson } 3533c4d7559SDave Watson lock_sock(sk); 354a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 355dbe42559SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3563c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 357dbe42559SDave Watson memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, 358c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3593c4d7559SDave Watson release_sock(sk); 360ac55cd61SDan Carpenter if (copy_to_user(optval, 3613c4d7559SDave Watson crypto_info_aes_gcm_128, 362ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 363ac55cd61SDan Carpenter rc = -EFAULT; 3643c4d7559SDave Watson break; 3653c4d7559SDave Watson } 3663c4d7559SDave Watson default: 3673c4d7559SDave Watson rc = -EINVAL; 3683c4d7559SDave Watson } 3693c4d7559SDave Watson 3703c4d7559SDave Watson out: 3713c4d7559SDave Watson return rc; 3723c4d7559SDave Watson } 3733c4d7559SDave Watson 3743c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 3753c4d7559SDave Watson char __user *optval, int __user *optlen) 3763c4d7559SDave Watson { 3773c4d7559SDave Watson int rc = 0; 3783c4d7559SDave Watson 3793c4d7559SDave Watson switch (optname) { 3803c4d7559SDave Watson case TLS_TX: 3813c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 3823c4d7559SDave Watson break; 3833c4d7559SDave Watson default: 3843c4d7559SDave Watson rc = -ENOPROTOOPT; 3853c4d7559SDave Watson break; 3863c4d7559SDave Watson } 3873c4d7559SDave Watson return rc; 3883c4d7559SDave Watson } 3893c4d7559SDave Watson 3903c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 3913c4d7559SDave Watson char __user *optval, int __user *optlen) 3923c4d7559SDave Watson { 3933c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3943c4d7559SDave Watson 3953c4d7559SDave Watson if (level != SOL_TLS) 3963c4d7559SDave Watson return ctx->getsockopt(sk, level, optname, optval, optlen); 3973c4d7559SDave Watson 3983c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 3993c4d7559SDave Watson } 4003c4d7559SDave Watson 401c46234ebSDave Watson static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, 402c46234ebSDave Watson unsigned int optlen, int tx) 4033c4d7559SDave Watson { 404196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4053c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4063c4d7559SDave Watson int rc = 0; 40758371585SDave Watson int conf; 4083c4d7559SDave Watson 4093c4d7559SDave Watson if (!optval || (optlen < sizeof(*crypto_info))) { 4103c4d7559SDave Watson rc = -EINVAL; 4113c4d7559SDave Watson goto out; 4123c4d7559SDave Watson } 4133c4d7559SDave Watson 414c46234ebSDave Watson if (tx) 415196c31b4SIlya Lesokhin crypto_info = &ctx->crypto_send; 416c46234ebSDave Watson else 417c46234ebSDave Watson crypto_info = &ctx->crypto_recv; 418c46234ebSDave Watson 419196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 420877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 421877d17c7SSabrina Dubroca rc = -EBUSY; 422196c31b4SIlya Lesokhin goto out; 423877d17c7SSabrina Dubroca } 424196c31b4SIlya Lesokhin 425196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); 4263c4d7559SDave Watson if (rc) { 4273c4d7559SDave Watson rc = -EFAULT; 428257082e6SBoris Pismenny goto err_crypto_info; 4293c4d7559SDave Watson } 4303c4d7559SDave Watson 4313c4d7559SDave Watson /* check version */ 432196c31b4SIlya Lesokhin if (crypto_info->version != TLS_1_2_VERSION) { 4333c4d7559SDave Watson rc = -ENOTSUPP; 434196c31b4SIlya Lesokhin goto err_crypto_info; 4353c4d7559SDave Watson } 4363c4d7559SDave Watson 437196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 4383c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 4393c4d7559SDave Watson if (optlen != sizeof(struct tls12_crypto_info_aes_gcm_128)) { 4403c4d7559SDave Watson rc = -EINVAL; 4416db959c8SSabrina Dubroca goto err_crypto_info; 4423c4d7559SDave Watson } 443196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), 444196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 4453c4d7559SDave Watson if (rc) { 4463c4d7559SDave Watson rc = -EFAULT; 4473c4d7559SDave Watson goto err_crypto_info; 4483c4d7559SDave Watson } 4493c4d7559SDave Watson break; 4503c4d7559SDave Watson } 4513c4d7559SDave Watson default: 4523c4d7559SDave Watson rc = -EINVAL; 4536db959c8SSabrina Dubroca goto err_crypto_info; 4543c4d7559SDave Watson } 4553c4d7559SDave Watson 456c46234ebSDave Watson if (tx) { 457e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 458e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 459e8f69799SIlya Lesokhin conf = TLS_HW; 460e8f69799SIlya Lesokhin if (rc) { 461e8f69799SIlya Lesokhin #else 462e8f69799SIlya Lesokhin { 463e8f69799SIlya Lesokhin #endif 464c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 465f66de3eeSBoris Pismenny conf = TLS_SW; 466e8f69799SIlya Lesokhin } 467c46234ebSDave Watson } else { 468c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 469f66de3eeSBoris Pismenny conf = TLS_SW; 470c46234ebSDave Watson } 471c46234ebSDave Watson 4723c4d7559SDave Watson if (rc) 4733c4d7559SDave Watson goto err_crypto_info; 4743c4d7559SDave Watson 475f66de3eeSBoris Pismenny if (tx) 476f66de3eeSBoris Pismenny ctx->tx_conf = conf; 477f66de3eeSBoris Pismenny else 478f66de3eeSBoris Pismenny ctx->rx_conf = conf; 4796d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 480c46234ebSDave Watson if (tx) { 481ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 482ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 483c46234ebSDave Watson } else { 484c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 485c46234ebSDave Watson } 4863c4d7559SDave Watson goto out; 4873c4d7559SDave Watson 4883c4d7559SDave Watson err_crypto_info: 4893c4d7559SDave Watson memset(crypto_info, 0, sizeof(*crypto_info)); 4903c4d7559SDave Watson out: 4913c4d7559SDave Watson return rc; 4923c4d7559SDave Watson } 4933c4d7559SDave Watson 4943c4d7559SDave Watson static int do_tls_setsockopt(struct sock *sk, int optname, 4953c4d7559SDave Watson char __user *optval, unsigned int optlen) 4963c4d7559SDave Watson { 4973c4d7559SDave Watson int rc = 0; 4983c4d7559SDave Watson 4993c4d7559SDave Watson switch (optname) { 5003c4d7559SDave Watson case TLS_TX: 501c46234ebSDave Watson case TLS_RX: 5023c4d7559SDave Watson lock_sock(sk); 503c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 504c46234ebSDave Watson optname == TLS_TX); 5053c4d7559SDave Watson release_sock(sk); 5063c4d7559SDave Watson break; 5073c4d7559SDave Watson default: 5083c4d7559SDave Watson rc = -ENOPROTOOPT; 5093c4d7559SDave Watson break; 5103c4d7559SDave Watson } 5113c4d7559SDave Watson return rc; 5123c4d7559SDave Watson } 5133c4d7559SDave Watson 5143c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 5153c4d7559SDave Watson char __user *optval, unsigned int optlen) 5163c4d7559SDave Watson { 5173c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 5183c4d7559SDave Watson 5193c4d7559SDave Watson if (level != SOL_TLS) 5203c4d7559SDave Watson return ctx->setsockopt(sk, level, optname, optval, optlen); 5213c4d7559SDave Watson 5223c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 5233c4d7559SDave Watson } 5243c4d7559SDave Watson 525dd0bed16SAtul Gupta static struct tls_context *create_ctx(struct sock *sk) 526dd0bed16SAtul Gupta { 527dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 528dd0bed16SAtul Gupta struct tls_context *ctx; 529dd0bed16SAtul Gupta 530dd0bed16SAtul Gupta ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 531dd0bed16SAtul Gupta if (!ctx) 532dd0bed16SAtul Gupta return NULL; 533dd0bed16SAtul Gupta 534dd0bed16SAtul Gupta icsk->icsk_ulp_data = ctx; 535dd0bed16SAtul Gupta return ctx; 536dd0bed16SAtul Gupta } 537dd0bed16SAtul Gupta 538dd0bed16SAtul Gupta static int tls_hw_prot(struct sock *sk) 539dd0bed16SAtul Gupta { 540dd0bed16SAtul Gupta struct tls_context *ctx; 541dd0bed16SAtul Gupta struct tls_device *dev; 542dd0bed16SAtul Gupta int rc = 0; 543dd0bed16SAtul Gupta 544dd0bed16SAtul Gupta mutex_lock(&device_mutex); 545dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 546dd0bed16SAtul Gupta if (dev->feature && dev->feature(dev)) { 547dd0bed16SAtul Gupta ctx = create_ctx(sk); 548dd0bed16SAtul Gupta if (!ctx) 549dd0bed16SAtul Gupta goto out; 550dd0bed16SAtul Gupta 551dd0bed16SAtul Gupta ctx->hash = sk->sk_prot->hash; 552dd0bed16SAtul Gupta ctx->unhash = sk->sk_prot->unhash; 553dd0bed16SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 554f66de3eeSBoris Pismenny ctx->rx_conf = TLS_HW_RECORD; 555f66de3eeSBoris Pismenny ctx->tx_conf = TLS_HW_RECORD; 556dd0bed16SAtul Gupta update_sk_prot(sk, ctx); 557dd0bed16SAtul Gupta rc = 1; 558dd0bed16SAtul Gupta break; 559dd0bed16SAtul Gupta } 560dd0bed16SAtul Gupta } 561dd0bed16SAtul Gupta out: 562dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 563dd0bed16SAtul Gupta return rc; 564dd0bed16SAtul Gupta } 565dd0bed16SAtul Gupta 566dd0bed16SAtul Gupta static void tls_hw_unhash(struct sock *sk) 567dd0bed16SAtul Gupta { 568dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 569dd0bed16SAtul Gupta struct tls_device *dev; 570dd0bed16SAtul Gupta 571dd0bed16SAtul Gupta mutex_lock(&device_mutex); 572dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 573dd0bed16SAtul Gupta if (dev->unhash) 574dd0bed16SAtul Gupta dev->unhash(dev, sk); 575dd0bed16SAtul Gupta } 576dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 577dd0bed16SAtul Gupta ctx->unhash(sk); 578dd0bed16SAtul Gupta } 579dd0bed16SAtul Gupta 580dd0bed16SAtul Gupta static int tls_hw_hash(struct sock *sk) 581dd0bed16SAtul Gupta { 582dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 583dd0bed16SAtul Gupta struct tls_device *dev; 584dd0bed16SAtul Gupta int err; 585dd0bed16SAtul Gupta 586dd0bed16SAtul Gupta err = ctx->hash(sk); 587dd0bed16SAtul Gupta mutex_lock(&device_mutex); 588dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 589dd0bed16SAtul Gupta if (dev->hash) 590dd0bed16SAtul Gupta err |= dev->hash(dev, sk); 591dd0bed16SAtul Gupta } 592dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 593dd0bed16SAtul Gupta 594dd0bed16SAtul Gupta if (err) 595dd0bed16SAtul Gupta tls_hw_unhash(sk); 596dd0bed16SAtul Gupta return err; 597dd0bed16SAtul Gupta } 598dd0bed16SAtul Gupta 599f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 600f66de3eeSBoris Pismenny struct proto *base) 601c113187dSBoris Pismenny { 602f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 603f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 604f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 605f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 606c113187dSBoris Pismenny 607f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 608f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 609f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 610c46234ebSDave Watson 611f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 612f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 613f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 614c46234ebSDave Watson 615f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 616f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 617f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 618dd0bed16SAtul Gupta 619e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 620e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 621e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 622e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 623e8f69799SIlya Lesokhin 624e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 625e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 626e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 627e8f69799SIlya Lesokhin #endif 628e8f69799SIlya Lesokhin 629f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 630f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash; 631f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash; 632f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].close = tls_sk_proto_close; 633c113187dSBoris Pismenny } 634c113187dSBoris Pismenny 6353c4d7559SDave Watson static int tls_init(struct sock *sk) 6363c4d7559SDave Watson { 637c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 6383c4d7559SDave Watson struct tls_context *ctx; 6393c4d7559SDave Watson int rc = 0; 6403c4d7559SDave Watson 641dd0bed16SAtul Gupta if (tls_hw_prot(sk)) 642dd0bed16SAtul Gupta goto out; 643dd0bed16SAtul Gupta 644d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 645d91c3e17SIlya Lesokhin * in ESTABLISHED state. 646d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 647d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 648d91c3e17SIlya Lesokhin * share the ulp context. 649d91c3e17SIlya Lesokhin */ 650d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 651d91c3e17SIlya Lesokhin return -ENOTSUPP; 652d91c3e17SIlya Lesokhin 6533c4d7559SDave Watson /* allocate tls context */ 654dd0bed16SAtul Gupta ctx = create_ctx(sk); 6553c4d7559SDave Watson if (!ctx) { 6563c4d7559SDave Watson rc = -ENOMEM; 6573c4d7559SDave Watson goto out; 6583c4d7559SDave Watson } 6593c4d7559SDave Watson ctx->setsockopt = sk->sk_prot->setsockopt; 6603c4d7559SDave Watson ctx->getsockopt = sk->sk_prot->getsockopt; 661ff45d820SIlya Lesokhin ctx->sk_proto_close = sk->sk_prot->close; 6626d88207fSIlya Lesokhin 663c113187dSBoris Pismenny /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 664c113187dSBoris Pismenny if (ip_ver == TLSV6 && 665c113187dSBoris Pismenny unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { 666c113187dSBoris Pismenny mutex_lock(&tcpv6_prot_mutex); 667c113187dSBoris Pismenny if (likely(sk->sk_prot != saved_tcpv6_prot)) { 668c113187dSBoris Pismenny build_protos(tls_prots[TLSV6], sk->sk_prot); 669c113187dSBoris Pismenny smp_store_release(&saved_tcpv6_prot, sk->sk_prot); 670c113187dSBoris Pismenny } 671c113187dSBoris Pismenny mutex_unlock(&tcpv6_prot_mutex); 672c113187dSBoris Pismenny } 673c113187dSBoris Pismenny 674f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 675f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 6766d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 6773c4d7559SDave Watson out: 6783c4d7559SDave Watson return rc; 6793c4d7559SDave Watson } 6803c4d7559SDave Watson 681dd0bed16SAtul Gupta void tls_register_device(struct tls_device *device) 682dd0bed16SAtul Gupta { 683dd0bed16SAtul Gupta mutex_lock(&device_mutex); 684dd0bed16SAtul Gupta list_add_tail(&device->dev_list, &device_list); 685dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 686dd0bed16SAtul Gupta } 687dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_register_device); 688dd0bed16SAtul Gupta 689dd0bed16SAtul Gupta void tls_unregister_device(struct tls_device *device) 690dd0bed16SAtul Gupta { 691dd0bed16SAtul Gupta mutex_lock(&device_mutex); 692dd0bed16SAtul Gupta list_del(&device->dev_list); 693dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 694dd0bed16SAtul Gupta } 695dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_unregister_device); 696dd0bed16SAtul Gupta 6973c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 6983c4d7559SDave Watson .name = "tls", 699b11a632cSJohn Fastabend .uid = TCP_ULP_TLS, 700b11a632cSJohn Fastabend .user_visible = true, 7013c4d7559SDave Watson .owner = THIS_MODULE, 7023c4d7559SDave Watson .init = tls_init, 7033c4d7559SDave Watson }; 7043c4d7559SDave Watson 7053c4d7559SDave Watson static int __init tls_register(void) 7063c4d7559SDave Watson { 707c113187dSBoris Pismenny build_protos(tls_prots[TLSV4], &tcp_prot); 7083c4d7559SDave Watson 709c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 710c46234ebSDave Watson tls_sw_proto_ops.poll = tls_sw_poll; 711c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 712c46234ebSDave Watson 713e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 714e8f69799SIlya Lesokhin tls_device_init(); 715e8f69799SIlya Lesokhin #endif 7163c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 7173c4d7559SDave Watson 7183c4d7559SDave Watson return 0; 7193c4d7559SDave Watson } 7203c4d7559SDave Watson 7213c4d7559SDave Watson static void __exit tls_unregister(void) 7223c4d7559SDave Watson { 7233c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 724e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 725e8f69799SIlya Lesokhin tls_device_cleanup(); 726e8f69799SIlya Lesokhin #endif 7273c4d7559SDave Watson } 7283c4d7559SDave Watson 7293c4d7559SDave Watson module_init(tls_register); 7303c4d7559SDave Watson module_exit(tls_unregister); 731