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"); 48037b0b86SDaniel Borkmann MODULE_ALIAS_TCP_ULP("tls"); 493c4d7559SDave Watson 506d88207fSIlya Lesokhin enum { 51c113187dSBoris Pismenny TLSV4, 52c113187dSBoris Pismenny TLSV6, 53c113187dSBoris Pismenny TLS_NUM_PROTS, 54c113187dSBoris Pismenny }; 556d88207fSIlya Lesokhin 56c113187dSBoris Pismenny static struct proto *saved_tcpv6_prot; 57c113187dSBoris Pismenny static DEFINE_MUTEX(tcpv6_prot_mutex); 58dd0bed16SAtul Gupta static LIST_HEAD(device_list); 59dd0bed16SAtul Gupta static DEFINE_MUTEX(device_mutex); 60f66de3eeSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 61c46234ebSDave Watson static struct proto_ops tls_sw_proto_ops; 626d88207fSIlya Lesokhin 63f66de3eeSBoris Pismenny static void update_sk_prot(struct sock *sk, struct tls_context *ctx) 646d88207fSIlya Lesokhin { 65c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 66c113187dSBoris Pismenny 67f66de3eeSBoris Pismenny sk->sk_prot = &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]; 686d88207fSIlya Lesokhin } 693c4d7559SDave Watson 703c4d7559SDave Watson int wait_on_pending_writer(struct sock *sk, long *timeo) 713c4d7559SDave Watson { 723c4d7559SDave Watson int rc = 0; 733c4d7559SDave Watson DEFINE_WAIT_FUNC(wait, woken_wake_function); 743c4d7559SDave Watson 753c4d7559SDave Watson add_wait_queue(sk_sleep(sk), &wait); 763c4d7559SDave Watson while (1) { 773c4d7559SDave Watson if (!*timeo) { 783c4d7559SDave Watson rc = -EAGAIN; 793c4d7559SDave Watson break; 803c4d7559SDave Watson } 813c4d7559SDave Watson 823c4d7559SDave Watson if (signal_pending(current)) { 833c4d7559SDave Watson rc = sock_intr_errno(*timeo); 843c4d7559SDave Watson break; 853c4d7559SDave Watson } 863c4d7559SDave Watson 873c4d7559SDave Watson if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) 883c4d7559SDave Watson break; 893c4d7559SDave Watson } 903c4d7559SDave Watson remove_wait_queue(sk_sleep(sk), &wait); 913c4d7559SDave Watson return rc; 923c4d7559SDave Watson } 933c4d7559SDave Watson 943c4d7559SDave Watson int tls_push_sg(struct sock *sk, 953c4d7559SDave Watson struct tls_context *ctx, 963c4d7559SDave Watson struct scatterlist *sg, 973c4d7559SDave Watson u16 first_offset, 983c4d7559SDave Watson int flags) 993c4d7559SDave Watson { 1003c4d7559SDave Watson int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; 1013c4d7559SDave Watson int ret = 0; 1023c4d7559SDave Watson struct page *p; 1033c4d7559SDave Watson size_t size; 1043c4d7559SDave Watson int offset = first_offset; 1053c4d7559SDave Watson 1063c4d7559SDave Watson size = sg->length - offset; 1073c4d7559SDave Watson offset += sg->offset; 1083c4d7559SDave Watson 109c212d2c7SDave Watson ctx->in_tcp_sendpages = true; 1103c4d7559SDave Watson while (1) { 1113c4d7559SDave Watson if (sg_is_last(sg)) 1123c4d7559SDave Watson sendpage_flags = flags; 1133c4d7559SDave Watson 1143c4d7559SDave Watson /* is sending application-limited? */ 1153c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1163c4d7559SDave Watson p = sg_page(sg); 1173c4d7559SDave Watson retry: 1183c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1193c4d7559SDave Watson 1203c4d7559SDave Watson if (ret != size) { 1213c4d7559SDave Watson if (ret > 0) { 1223c4d7559SDave Watson offset += ret; 1233c4d7559SDave Watson size -= ret; 1243c4d7559SDave Watson goto retry; 1253c4d7559SDave Watson } 1263c4d7559SDave Watson 1273c4d7559SDave Watson offset -= sg->offset; 1283c4d7559SDave Watson ctx->partially_sent_offset = offset; 1293c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 130080324c3SAndre Tomt ctx->in_tcp_sendpages = false; 1313c4d7559SDave Watson return ret; 1323c4d7559SDave Watson } 1333c4d7559SDave Watson 1343c4d7559SDave Watson put_page(p); 1353c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1363c4d7559SDave Watson sg = sg_next(sg); 1373c4d7559SDave Watson if (!sg) 1383c4d7559SDave Watson break; 1393c4d7559SDave Watson 1403c4d7559SDave Watson offset = sg->offset; 1413c4d7559SDave Watson size = sg->length; 1423c4d7559SDave Watson } 1433c4d7559SDave Watson 1443c4d7559SDave Watson clear_bit(TLS_PENDING_CLOSED_RECORD, &ctx->flags); 145c212d2c7SDave Watson ctx->in_tcp_sendpages = false; 146c212d2c7SDave Watson ctx->sk_write_space(sk); 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 21667db7cd2SJohn Fastabend /* If in_tcp_sendpages call lower protocol write space handler 21767db7cd2SJohn Fastabend * to ensure we wake up any waiting operations there. For example 21867db7cd2SJohn Fastabend * if do_tcp_sendpages where to call sk_wait_event. 21967db7cd2SJohn Fastabend */ 22067db7cd2SJohn Fastabend if (ctx->in_tcp_sendpages) { 22167db7cd2SJohn Fastabend ctx->sk_write_space(sk); 222c212d2c7SDave Watson return; 22367db7cd2SJohn Fastabend } 224c212d2c7SDave Watson 2253c4d7559SDave Watson if (!sk->sk_write_pending && tls_is_pending_closed_record(ctx)) { 2263c4d7559SDave Watson gfp_t sk_allocation = sk->sk_allocation; 2273c4d7559SDave Watson int rc; 2283c4d7559SDave Watson long timeo = 0; 2293c4d7559SDave Watson 2303c4d7559SDave Watson sk->sk_allocation = GFP_ATOMIC; 2313c4d7559SDave Watson rc = tls_push_pending_closed_record(sk, ctx, 2323c4d7559SDave Watson MSG_DONTWAIT | 2333c4d7559SDave Watson MSG_NOSIGNAL, 2343c4d7559SDave Watson &timeo); 2353c4d7559SDave Watson sk->sk_allocation = sk_allocation; 2363c4d7559SDave Watson 2373c4d7559SDave Watson if (rc < 0) 2383c4d7559SDave Watson return; 2393c4d7559SDave Watson } 2403c4d7559SDave Watson 2413c4d7559SDave Watson ctx->sk_write_space(sk); 2423c4d7559SDave Watson } 2433c4d7559SDave Watson 24486029d10SSabrina Dubroca static void tls_ctx_free(struct tls_context *ctx) 24586029d10SSabrina Dubroca { 24686029d10SSabrina Dubroca if (!ctx) 24786029d10SSabrina Dubroca return; 24886029d10SSabrina Dubroca 24986029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); 25086029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); 25186029d10SSabrina Dubroca kfree(ctx); 25286029d10SSabrina Dubroca } 25386029d10SSabrina Dubroca 2543c4d7559SDave Watson static void tls_sk_proto_close(struct sock *sk, long timeout) 2553c4d7559SDave Watson { 2563c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2573c4d7559SDave Watson long timeo = sock_sndtimeo(sk, 0); 2583c4d7559SDave Watson void (*sk_proto_close)(struct sock *sk, long timeout); 25998f0a395SEric Dumazet bool free_ctx = false; 2603c4d7559SDave Watson 2613c4d7559SDave Watson lock_sock(sk); 262ff45d820SIlya Lesokhin sk_proto_close = ctx->sk_proto_close; 263ff45d820SIlya Lesokhin 264b2d6cee1SDavid S. Miller if ((ctx->tx_conf == TLS_HW_RECORD && ctx->rx_conf == TLS_HW_RECORD) || 265b2d6cee1SDavid S. Miller (ctx->tx_conf == TLS_BASE && ctx->rx_conf == TLS_BASE)) { 26698f0a395SEric Dumazet free_ctx = true; 267ff45d820SIlya Lesokhin goto skip_tx_cleanup; 268ff45d820SIlya Lesokhin } 2693c4d7559SDave Watson 2703c4d7559SDave Watson if (!tls_complete_pending_work(sk, ctx, 0, &timeo)) 2713c4d7559SDave Watson tls_handle_open_record(sk, 0); 2723c4d7559SDave Watson 2733c4d7559SDave Watson if (ctx->partially_sent_record) { 2743c4d7559SDave Watson struct scatterlist *sg = ctx->partially_sent_record; 2753c4d7559SDave Watson 2763c4d7559SDave Watson while (1) { 2773c4d7559SDave Watson put_page(sg_page(sg)); 2783c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 2793c4d7559SDave Watson 2803c4d7559SDave Watson if (sg_is_last(sg)) 2813c4d7559SDave Watson break; 2823c4d7559SDave Watson sg++; 2833c4d7559SDave Watson } 2843c4d7559SDave Watson } 285ff45d820SIlya Lesokhin 286f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 287f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 288dbe42559SDave Watson kfree(ctx->tx.rec_seq); 289dbe42559SDave Watson kfree(ctx->tx.iv); 290f66de3eeSBoris Pismenny tls_sw_free_resources_tx(sk); 291f66de3eeSBoris Pismenny } 292f66de3eeSBoris Pismenny 293f66de3eeSBoris Pismenny if (ctx->rx_conf == TLS_SW) { 294c46234ebSDave Watson kfree(ctx->rx.rec_seq); 295c46234ebSDave Watson kfree(ctx->rx.iv); 296f66de3eeSBoris Pismenny tls_sw_free_resources_rx(sk); 297c46234ebSDave Watson } 2983c4d7559SDave Watson 299e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 3004799ac81SBoris Pismenny if (ctx->rx_conf == TLS_HW) 3014799ac81SBoris Pismenny tls_device_offload_cleanup_rx(sk); 3024799ac81SBoris Pismenny 3034799ac81SBoris Pismenny if (ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW) { 304e8f69799SIlya Lesokhin #else 305e8f69799SIlya Lesokhin { 306e8f69799SIlya Lesokhin #endif 30786029d10SSabrina Dubroca tls_ctx_free(ctx); 308e8f69799SIlya Lesokhin ctx = NULL; 309e8f69799SIlya Lesokhin } 310e8f69799SIlya Lesokhin 311ff45d820SIlya Lesokhin skip_tx_cleanup: 3123c4d7559SDave Watson release_sock(sk); 3133c4d7559SDave Watson sk_proto_close(sk, timeout); 314dd0bed16SAtul Gupta /* free ctx for TLS_HW_RECORD, used by tcp_set_state 315dd0bed16SAtul Gupta * for sk->sk_prot->unhash [tls_hw_unhash] 316dd0bed16SAtul Gupta */ 31798f0a395SEric Dumazet if (free_ctx) 31886029d10SSabrina Dubroca tls_ctx_free(ctx); 3193c4d7559SDave Watson } 3203c4d7559SDave Watson 3213c4d7559SDave Watson static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, 3223c4d7559SDave Watson int __user *optlen) 3233c4d7559SDave Watson { 3243c4d7559SDave Watson int rc = 0; 3253c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3263c4d7559SDave Watson struct tls_crypto_info *crypto_info; 3273c4d7559SDave Watson int len; 3283c4d7559SDave Watson 3293c4d7559SDave Watson if (get_user(len, optlen)) 3303c4d7559SDave Watson return -EFAULT; 3313c4d7559SDave Watson 3323c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 3333c4d7559SDave Watson rc = -EINVAL; 3343c4d7559SDave Watson goto out; 3353c4d7559SDave Watson } 3363c4d7559SDave Watson 3373c4d7559SDave Watson if (!ctx) { 3383c4d7559SDave Watson rc = -EBUSY; 3393c4d7559SDave Watson goto out; 3403c4d7559SDave Watson } 3413c4d7559SDave Watson 3423c4d7559SDave Watson /* get user crypto info */ 34386029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 3443c4d7559SDave Watson 3453c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3463c4d7559SDave Watson rc = -EBUSY; 3473c4d7559SDave Watson goto out; 3483c4d7559SDave Watson } 3493c4d7559SDave Watson 3505a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 351ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 352ac55cd61SDan Carpenter rc = -EFAULT; 3533c4d7559SDave Watson goto out; 3543c4d7559SDave Watson } 3553c4d7559SDave Watson 3563c4d7559SDave Watson switch (crypto_info->cipher_type) { 3573c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3583c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3593c4d7559SDave Watson crypto_info_aes_gcm_128 = 3603c4d7559SDave Watson container_of(crypto_info, 3613c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3623c4d7559SDave Watson info); 3633c4d7559SDave Watson 3643c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3653c4d7559SDave Watson rc = -EINVAL; 3663c4d7559SDave Watson goto out; 3673c4d7559SDave Watson } 3683c4d7559SDave Watson lock_sock(sk); 369a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 370dbe42559SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3713c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 372dbe42559SDave Watson memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, 373c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3743c4d7559SDave Watson release_sock(sk); 375ac55cd61SDan Carpenter if (copy_to_user(optval, 3763c4d7559SDave Watson crypto_info_aes_gcm_128, 377ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 378ac55cd61SDan Carpenter rc = -EFAULT; 3793c4d7559SDave Watson break; 3803c4d7559SDave Watson } 3813c4d7559SDave Watson default: 3823c4d7559SDave Watson rc = -EINVAL; 3833c4d7559SDave Watson } 3843c4d7559SDave Watson 3853c4d7559SDave Watson out: 3863c4d7559SDave Watson return rc; 3873c4d7559SDave Watson } 3883c4d7559SDave Watson 3893c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 3903c4d7559SDave Watson char __user *optval, int __user *optlen) 3913c4d7559SDave Watson { 3923c4d7559SDave Watson int rc = 0; 3933c4d7559SDave Watson 3943c4d7559SDave Watson switch (optname) { 3953c4d7559SDave Watson case TLS_TX: 3963c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 3973c4d7559SDave Watson break; 3983c4d7559SDave Watson default: 3993c4d7559SDave Watson rc = -ENOPROTOOPT; 4003c4d7559SDave Watson break; 4013c4d7559SDave Watson } 4023c4d7559SDave Watson return rc; 4033c4d7559SDave Watson } 4043c4d7559SDave Watson 4053c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 4063c4d7559SDave Watson char __user *optval, int __user *optlen) 4073c4d7559SDave Watson { 4083c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4093c4d7559SDave Watson 4103c4d7559SDave Watson if (level != SOL_TLS) 4113c4d7559SDave Watson return ctx->getsockopt(sk, level, optname, optval, optlen); 4123c4d7559SDave Watson 4133c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 4143c4d7559SDave Watson } 4153c4d7559SDave Watson 416c46234ebSDave Watson static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, 417c46234ebSDave Watson unsigned int optlen, int tx) 4183c4d7559SDave Watson { 419196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4203c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4213c4d7559SDave Watson int rc = 0; 42258371585SDave Watson int conf; 4233c4d7559SDave Watson 4243c4d7559SDave Watson if (!optval || (optlen < sizeof(*crypto_info))) { 4253c4d7559SDave Watson rc = -EINVAL; 4263c4d7559SDave Watson goto out; 4273c4d7559SDave Watson } 4283c4d7559SDave Watson 429c46234ebSDave Watson if (tx) 43086029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 431c46234ebSDave Watson else 43286029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 433c46234ebSDave Watson 434196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 435877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 436877d17c7SSabrina Dubroca rc = -EBUSY; 437196c31b4SIlya Lesokhin goto out; 438877d17c7SSabrina Dubroca } 439196c31b4SIlya Lesokhin 440196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); 4413c4d7559SDave Watson if (rc) { 4423c4d7559SDave Watson rc = -EFAULT; 443257082e6SBoris Pismenny goto err_crypto_info; 4443c4d7559SDave Watson } 4453c4d7559SDave Watson 4463c4d7559SDave Watson /* check version */ 447196c31b4SIlya Lesokhin if (crypto_info->version != TLS_1_2_VERSION) { 4483c4d7559SDave Watson rc = -ENOTSUPP; 449196c31b4SIlya Lesokhin goto err_crypto_info; 4503c4d7559SDave Watson } 4513c4d7559SDave Watson 452196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 4533c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 4543c4d7559SDave Watson if (optlen != sizeof(struct tls12_crypto_info_aes_gcm_128)) { 4553c4d7559SDave Watson rc = -EINVAL; 4566db959c8SSabrina Dubroca goto err_crypto_info; 4573c4d7559SDave Watson } 458196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), 459196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 4603c4d7559SDave Watson if (rc) { 4613c4d7559SDave Watson rc = -EFAULT; 4623c4d7559SDave Watson goto err_crypto_info; 4633c4d7559SDave Watson } 4643c4d7559SDave Watson break; 4653c4d7559SDave Watson } 4663c4d7559SDave Watson default: 4673c4d7559SDave Watson rc = -EINVAL; 4686db959c8SSabrina Dubroca goto err_crypto_info; 4693c4d7559SDave Watson } 4703c4d7559SDave Watson 471c46234ebSDave Watson if (tx) { 472e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 473e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 474e8f69799SIlya Lesokhin conf = TLS_HW; 475e8f69799SIlya Lesokhin if (rc) { 476e8f69799SIlya Lesokhin #else 477e8f69799SIlya Lesokhin { 478e8f69799SIlya Lesokhin #endif 479c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 480f66de3eeSBoris Pismenny conf = TLS_SW; 481e8f69799SIlya Lesokhin } 482c46234ebSDave Watson } else { 4834799ac81SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 4844799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 4854799ac81SBoris Pismenny conf = TLS_HW; 4864799ac81SBoris Pismenny if (rc) { 4874799ac81SBoris Pismenny #else 4884799ac81SBoris Pismenny { 4894799ac81SBoris Pismenny #endif 490c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 491f66de3eeSBoris Pismenny conf = TLS_SW; 492c46234ebSDave Watson } 4934799ac81SBoris Pismenny } 494c46234ebSDave Watson 4953c4d7559SDave Watson if (rc) 4963c4d7559SDave Watson goto err_crypto_info; 4973c4d7559SDave Watson 498f66de3eeSBoris Pismenny if (tx) 499f66de3eeSBoris Pismenny ctx->tx_conf = conf; 500f66de3eeSBoris Pismenny else 501f66de3eeSBoris Pismenny ctx->rx_conf = conf; 5026d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 503c46234ebSDave Watson if (tx) { 504ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 505ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 506c46234ebSDave Watson } else { 507c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 508c46234ebSDave Watson } 5093c4d7559SDave Watson goto out; 5103c4d7559SDave Watson 5113c4d7559SDave Watson err_crypto_info: 512c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 5133c4d7559SDave Watson out: 5143c4d7559SDave Watson return rc; 5153c4d7559SDave Watson } 5163c4d7559SDave Watson 5173c4d7559SDave Watson static int do_tls_setsockopt(struct sock *sk, int optname, 5183c4d7559SDave Watson char __user *optval, unsigned int optlen) 5193c4d7559SDave Watson { 5203c4d7559SDave Watson int rc = 0; 5213c4d7559SDave Watson 5223c4d7559SDave Watson switch (optname) { 5233c4d7559SDave Watson case TLS_TX: 524c46234ebSDave Watson case TLS_RX: 5253c4d7559SDave Watson lock_sock(sk); 526c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 527c46234ebSDave Watson optname == TLS_TX); 5283c4d7559SDave Watson release_sock(sk); 5293c4d7559SDave Watson break; 5303c4d7559SDave Watson default: 5313c4d7559SDave Watson rc = -ENOPROTOOPT; 5323c4d7559SDave Watson break; 5333c4d7559SDave Watson } 5343c4d7559SDave Watson return rc; 5353c4d7559SDave Watson } 5363c4d7559SDave Watson 5373c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 5383c4d7559SDave Watson char __user *optval, unsigned int optlen) 5393c4d7559SDave Watson { 5403c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 5413c4d7559SDave Watson 5423c4d7559SDave Watson if (level != SOL_TLS) 5433c4d7559SDave Watson return ctx->setsockopt(sk, level, optname, optval, optlen); 5443c4d7559SDave Watson 5453c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 5463c4d7559SDave Watson } 5473c4d7559SDave Watson 548dd0bed16SAtul Gupta static struct tls_context *create_ctx(struct sock *sk) 549dd0bed16SAtul Gupta { 550dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 551dd0bed16SAtul Gupta struct tls_context *ctx; 552dd0bed16SAtul Gupta 553dd0bed16SAtul Gupta ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 554dd0bed16SAtul Gupta if (!ctx) 555dd0bed16SAtul Gupta return NULL; 556dd0bed16SAtul Gupta 557dd0bed16SAtul Gupta icsk->icsk_ulp_data = ctx; 558dd0bed16SAtul Gupta return ctx; 559dd0bed16SAtul Gupta } 560dd0bed16SAtul Gupta 561dd0bed16SAtul Gupta static int tls_hw_prot(struct sock *sk) 562dd0bed16SAtul Gupta { 563dd0bed16SAtul Gupta struct tls_context *ctx; 564dd0bed16SAtul Gupta struct tls_device *dev; 565dd0bed16SAtul Gupta int rc = 0; 566dd0bed16SAtul Gupta 567dd0bed16SAtul Gupta mutex_lock(&device_mutex); 568dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 569dd0bed16SAtul Gupta if (dev->feature && dev->feature(dev)) { 570dd0bed16SAtul Gupta ctx = create_ctx(sk); 571dd0bed16SAtul Gupta if (!ctx) 572dd0bed16SAtul Gupta goto out; 573dd0bed16SAtul Gupta 574dd0bed16SAtul Gupta ctx->hash = sk->sk_prot->hash; 575dd0bed16SAtul Gupta ctx->unhash = sk->sk_prot->unhash; 576dd0bed16SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 577f66de3eeSBoris Pismenny ctx->rx_conf = TLS_HW_RECORD; 578f66de3eeSBoris Pismenny ctx->tx_conf = TLS_HW_RECORD; 579dd0bed16SAtul Gupta update_sk_prot(sk, ctx); 580dd0bed16SAtul Gupta rc = 1; 581dd0bed16SAtul Gupta break; 582dd0bed16SAtul Gupta } 583dd0bed16SAtul Gupta } 584dd0bed16SAtul Gupta out: 585dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 586dd0bed16SAtul Gupta return rc; 587dd0bed16SAtul Gupta } 588dd0bed16SAtul Gupta 589dd0bed16SAtul Gupta static void tls_hw_unhash(struct sock *sk) 590dd0bed16SAtul Gupta { 591dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 592dd0bed16SAtul Gupta struct tls_device *dev; 593dd0bed16SAtul Gupta 594dd0bed16SAtul Gupta mutex_lock(&device_mutex); 595dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 596dd0bed16SAtul Gupta if (dev->unhash) 597dd0bed16SAtul Gupta dev->unhash(dev, sk); 598dd0bed16SAtul Gupta } 599dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 600dd0bed16SAtul Gupta ctx->unhash(sk); 601dd0bed16SAtul Gupta } 602dd0bed16SAtul Gupta 603dd0bed16SAtul Gupta static int tls_hw_hash(struct sock *sk) 604dd0bed16SAtul Gupta { 605dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 606dd0bed16SAtul Gupta struct tls_device *dev; 607dd0bed16SAtul Gupta int err; 608dd0bed16SAtul Gupta 609dd0bed16SAtul Gupta err = ctx->hash(sk); 610dd0bed16SAtul Gupta mutex_lock(&device_mutex); 611dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 612dd0bed16SAtul Gupta if (dev->hash) 613dd0bed16SAtul Gupta err |= dev->hash(dev, sk); 614dd0bed16SAtul Gupta } 615dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 616dd0bed16SAtul Gupta 617dd0bed16SAtul Gupta if (err) 618dd0bed16SAtul Gupta tls_hw_unhash(sk); 619dd0bed16SAtul Gupta return err; 620dd0bed16SAtul Gupta } 621dd0bed16SAtul Gupta 622f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 623f66de3eeSBoris Pismenny struct proto *base) 624c113187dSBoris Pismenny { 625f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 626f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 627f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 628f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 629c113187dSBoris Pismenny 630f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 631f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 632f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 633c46234ebSDave Watson 634f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 635f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 636f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 637c46234ebSDave Watson 638f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 639f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 640f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 641dd0bed16SAtul Gupta 642e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 643e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 644e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 645e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 646e8f69799SIlya Lesokhin 647e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 648e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 649e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 6504799ac81SBoris Pismenny 6514799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 6524799ac81SBoris Pismenny 6534799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 6544799ac81SBoris Pismenny 6554799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 656e8f69799SIlya Lesokhin #endif 657e8f69799SIlya Lesokhin 658f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 659f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash; 660f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash; 661f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].close = tls_sk_proto_close; 662c113187dSBoris Pismenny } 663c113187dSBoris Pismenny 6643c4d7559SDave Watson static int tls_init(struct sock *sk) 6653c4d7559SDave Watson { 666c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 6673c4d7559SDave Watson struct tls_context *ctx; 6683c4d7559SDave Watson int rc = 0; 6693c4d7559SDave Watson 670dd0bed16SAtul Gupta if (tls_hw_prot(sk)) 671dd0bed16SAtul Gupta goto out; 672dd0bed16SAtul Gupta 673d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 674d91c3e17SIlya Lesokhin * in ESTABLISHED state. 675d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 676d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 677d91c3e17SIlya Lesokhin * share the ulp context. 678d91c3e17SIlya Lesokhin */ 679d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 680d91c3e17SIlya Lesokhin return -ENOTSUPP; 681d91c3e17SIlya Lesokhin 6823c4d7559SDave Watson /* allocate tls context */ 683dd0bed16SAtul Gupta ctx = create_ctx(sk); 6843c4d7559SDave Watson if (!ctx) { 6853c4d7559SDave Watson rc = -ENOMEM; 6863c4d7559SDave Watson goto out; 6873c4d7559SDave Watson } 6883c4d7559SDave Watson ctx->setsockopt = sk->sk_prot->setsockopt; 6893c4d7559SDave Watson ctx->getsockopt = sk->sk_prot->getsockopt; 690ff45d820SIlya Lesokhin ctx->sk_proto_close = sk->sk_prot->close; 6916d88207fSIlya Lesokhin 692c113187dSBoris Pismenny /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 693c113187dSBoris Pismenny if (ip_ver == TLSV6 && 694c113187dSBoris Pismenny unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { 695c113187dSBoris Pismenny mutex_lock(&tcpv6_prot_mutex); 696c113187dSBoris Pismenny if (likely(sk->sk_prot != saved_tcpv6_prot)) { 697c113187dSBoris Pismenny build_protos(tls_prots[TLSV6], sk->sk_prot); 698c113187dSBoris Pismenny smp_store_release(&saved_tcpv6_prot, sk->sk_prot); 699c113187dSBoris Pismenny } 700c113187dSBoris Pismenny mutex_unlock(&tcpv6_prot_mutex); 701c113187dSBoris Pismenny } 702c113187dSBoris Pismenny 703f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 704f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 7056d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 7063c4d7559SDave Watson out: 7073c4d7559SDave Watson return rc; 7083c4d7559SDave Watson } 7093c4d7559SDave Watson 710dd0bed16SAtul Gupta void tls_register_device(struct tls_device *device) 711dd0bed16SAtul Gupta { 712dd0bed16SAtul Gupta mutex_lock(&device_mutex); 713dd0bed16SAtul Gupta list_add_tail(&device->dev_list, &device_list); 714dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 715dd0bed16SAtul Gupta } 716dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_register_device); 717dd0bed16SAtul Gupta 718dd0bed16SAtul Gupta void tls_unregister_device(struct tls_device *device) 719dd0bed16SAtul Gupta { 720dd0bed16SAtul Gupta mutex_lock(&device_mutex); 721dd0bed16SAtul Gupta list_del(&device->dev_list); 722dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 723dd0bed16SAtul Gupta } 724dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_unregister_device); 725dd0bed16SAtul Gupta 7263c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 7273c4d7559SDave Watson .name = "tls", 728b11a632cSJohn Fastabend .uid = TCP_ULP_TLS, 729b11a632cSJohn Fastabend .user_visible = true, 7303c4d7559SDave Watson .owner = THIS_MODULE, 7313c4d7559SDave Watson .init = tls_init, 7323c4d7559SDave Watson }; 7333c4d7559SDave Watson 7343c4d7559SDave Watson static int __init tls_register(void) 7353c4d7559SDave Watson { 736c113187dSBoris Pismenny build_protos(tls_prots[TLSV4], &tcp_prot); 7373c4d7559SDave Watson 738c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 739a11e1d43SLinus Torvalds tls_sw_proto_ops.poll = tls_sw_poll; 740c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 741c46234ebSDave Watson 742e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 743e8f69799SIlya Lesokhin tls_device_init(); 744e8f69799SIlya Lesokhin #endif 7453c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 7463c4d7559SDave Watson 7473c4d7559SDave Watson return 0; 7483c4d7559SDave Watson } 7493c4d7559SDave Watson 7503c4d7559SDave Watson static void __exit tls_unregister(void) 7513c4d7559SDave Watson { 7523c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 753e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 754e8f69799SIlya Lesokhin tls_device_cleanup(); 755e8f69799SIlya Lesokhin #endif 7563c4d7559SDave Watson } 7573c4d7559SDave Watson 7583c4d7559SDave Watson module_init(tls_register); 7593c4d7559SDave Watson module_exit(tls_unregister); 760