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 144c212d2c7SDave Watson ctx->in_tcp_sendpages = false; 145c212d2c7SDave Watson ctx->sk_write_space(sk); 1463c4d7559SDave Watson 1473c4d7559SDave Watson return 0; 1483c4d7559SDave Watson } 1493c4d7559SDave Watson 1503c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1513c4d7559SDave Watson { 1523c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1533c4d7559SDave Watson 1543c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1553c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1563c4d7559SDave Watson 1573c4d7559SDave Watson return 0; 1583c4d7559SDave Watson } 1593c4d7559SDave Watson 1603c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1613c4d7559SDave Watson unsigned char *record_type) 1623c4d7559SDave Watson { 1633c4d7559SDave Watson struct cmsghdr *cmsg; 1643c4d7559SDave Watson int rc = -EINVAL; 1653c4d7559SDave Watson 1663c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1673c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1683c4d7559SDave Watson return -EINVAL; 1693c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1703c4d7559SDave Watson continue; 1713c4d7559SDave Watson 1723c4d7559SDave Watson switch (cmsg->cmsg_type) { 1733c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1743c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1753c4d7559SDave Watson return -EINVAL; 1763c4d7559SDave Watson 1773c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1783c4d7559SDave Watson return -EINVAL; 1793c4d7559SDave Watson 1803c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1813c4d7559SDave Watson if (rc) 1823c4d7559SDave Watson return rc; 1833c4d7559SDave Watson 1843c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1853c4d7559SDave Watson rc = 0; 1863c4d7559SDave Watson break; 1873c4d7559SDave Watson default: 1883c4d7559SDave Watson return -EINVAL; 1893c4d7559SDave Watson } 1903c4d7559SDave Watson } 1913c4d7559SDave Watson 1923c4d7559SDave Watson return rc; 1933c4d7559SDave Watson } 1943c4d7559SDave Watson 195a42055e8SVakul Garg int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 196a42055e8SVakul Garg int flags) 1973c4d7559SDave Watson { 1983c4d7559SDave Watson struct scatterlist *sg; 1993c4d7559SDave Watson u16 offset; 2003c4d7559SDave Watson 2013c4d7559SDave Watson sg = ctx->partially_sent_record; 2023c4d7559SDave Watson offset = ctx->partially_sent_offset; 2033c4d7559SDave Watson 2043c4d7559SDave Watson ctx->partially_sent_record = NULL; 2053c4d7559SDave Watson return tls_push_sg(sk, ctx, sg, offset, flags); 2063c4d7559SDave Watson } 2073c4d7559SDave Watson 208a42055e8SVakul Garg int tls_push_pending_closed_record(struct sock *sk, 209a42055e8SVakul Garg struct tls_context *tls_ctx, 210a42055e8SVakul Garg int flags, long *timeo) 211a42055e8SVakul Garg { 212a42055e8SVakul Garg struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx); 213a42055e8SVakul Garg 214a42055e8SVakul Garg if (tls_is_partially_sent_record(tls_ctx) || 2159932a29aSVakul Garg !list_empty(&ctx->tx_list)) 216a42055e8SVakul Garg return tls_tx_records(sk, flags); 217a42055e8SVakul Garg else 218a42055e8SVakul Garg return tls_ctx->push_pending_record(sk, flags); 219a42055e8SVakul Garg } 220a42055e8SVakul Garg 2213c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2223c4d7559SDave Watson { 2233c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 224a42055e8SVakul Garg struct tls_sw_context_tx *tx_ctx = tls_sw_ctx_tx(ctx); 2253c4d7559SDave Watson 22667db7cd2SJohn Fastabend /* If in_tcp_sendpages call lower protocol write space handler 22767db7cd2SJohn Fastabend * to ensure we wake up any waiting operations there. For example 22867db7cd2SJohn Fastabend * if do_tcp_sendpages where to call sk_wait_event. 22967db7cd2SJohn Fastabend */ 23067db7cd2SJohn Fastabend if (ctx->in_tcp_sendpages) { 23167db7cd2SJohn Fastabend ctx->sk_write_space(sk); 232c212d2c7SDave Watson return; 23367db7cd2SJohn Fastabend } 234c212d2c7SDave Watson 235a42055e8SVakul Garg /* Schedule the transmission if tx list is ready */ 2369932a29aSVakul Garg if (is_tx_ready(tx_ctx) && !sk->sk_write_pending) { 237a42055e8SVakul Garg /* Schedule the transmission */ 238a42055e8SVakul Garg if (!test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask)) 239a42055e8SVakul Garg schedule_delayed_work(&tx_ctx->tx_work.work, 0); 2403c4d7559SDave Watson } 2413c4d7559SDave Watson 2423c4d7559SDave Watson ctx->sk_write_space(sk); 2433c4d7559SDave Watson } 2443c4d7559SDave Watson 24586029d10SSabrina Dubroca static void tls_ctx_free(struct tls_context *ctx) 24686029d10SSabrina Dubroca { 24786029d10SSabrina Dubroca if (!ctx) 24886029d10SSabrina Dubroca return; 24986029d10SSabrina Dubroca 25086029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); 25186029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); 25286029d10SSabrina Dubroca kfree(ctx); 25386029d10SSabrina Dubroca } 25486029d10SSabrina Dubroca 2553c4d7559SDave Watson static void tls_sk_proto_close(struct sock *sk, long timeout) 2563c4d7559SDave Watson { 2573c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2583c4d7559SDave Watson long timeo = sock_sndtimeo(sk, 0); 2593c4d7559SDave Watson void (*sk_proto_close)(struct sock *sk, long timeout); 26098f0a395SEric Dumazet bool free_ctx = false; 2613c4d7559SDave Watson 2623c4d7559SDave Watson lock_sock(sk); 263ff45d820SIlya Lesokhin sk_proto_close = ctx->sk_proto_close; 264ff45d820SIlya Lesokhin 265b2d6cee1SDavid S. Miller if ((ctx->tx_conf == TLS_HW_RECORD && ctx->rx_conf == TLS_HW_RECORD) || 266b2d6cee1SDavid S. Miller (ctx->tx_conf == TLS_BASE && ctx->rx_conf == TLS_BASE)) { 26798f0a395SEric Dumazet free_ctx = true; 268ff45d820SIlya Lesokhin goto skip_tx_cleanup; 269ff45d820SIlya Lesokhin } 2703c4d7559SDave Watson 2713c4d7559SDave Watson if (!tls_complete_pending_work(sk, ctx, 0, &timeo)) 2723c4d7559SDave Watson tls_handle_open_record(sk, 0); 2733c4d7559SDave Watson 274f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 275f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 276dbe42559SDave Watson kfree(ctx->tx.rec_seq); 277dbe42559SDave Watson kfree(ctx->tx.iv); 278f66de3eeSBoris Pismenny tls_sw_free_resources_tx(sk); 279f66de3eeSBoris Pismenny } 280f66de3eeSBoris Pismenny 281f66de3eeSBoris Pismenny if (ctx->rx_conf == TLS_SW) { 282c46234ebSDave Watson kfree(ctx->rx.rec_seq); 283c46234ebSDave Watson kfree(ctx->rx.iv); 284f66de3eeSBoris Pismenny tls_sw_free_resources_rx(sk); 285c46234ebSDave Watson } 2863c4d7559SDave Watson 287e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 2884799ac81SBoris Pismenny if (ctx->rx_conf == TLS_HW) 2894799ac81SBoris Pismenny tls_device_offload_cleanup_rx(sk); 2904799ac81SBoris Pismenny 2914799ac81SBoris Pismenny if (ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW) { 292e8f69799SIlya Lesokhin #else 293e8f69799SIlya Lesokhin { 294e8f69799SIlya Lesokhin #endif 29586029d10SSabrina Dubroca tls_ctx_free(ctx); 296e8f69799SIlya Lesokhin ctx = NULL; 297e8f69799SIlya Lesokhin } 298e8f69799SIlya Lesokhin 299ff45d820SIlya Lesokhin skip_tx_cleanup: 3003c4d7559SDave Watson release_sock(sk); 3013c4d7559SDave Watson sk_proto_close(sk, timeout); 302dd0bed16SAtul Gupta /* free ctx for TLS_HW_RECORD, used by tcp_set_state 303dd0bed16SAtul Gupta * for sk->sk_prot->unhash [tls_hw_unhash] 304dd0bed16SAtul Gupta */ 30598f0a395SEric Dumazet if (free_ctx) 30686029d10SSabrina Dubroca tls_ctx_free(ctx); 3073c4d7559SDave Watson } 3083c4d7559SDave Watson 3093c4d7559SDave Watson static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, 3103c4d7559SDave Watson int __user *optlen) 3113c4d7559SDave Watson { 3123c4d7559SDave Watson int rc = 0; 3133c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3143c4d7559SDave Watson struct tls_crypto_info *crypto_info; 3153c4d7559SDave Watson int len; 3163c4d7559SDave Watson 3173c4d7559SDave Watson if (get_user(len, optlen)) 3183c4d7559SDave Watson return -EFAULT; 3193c4d7559SDave Watson 3203c4d7559SDave Watson if (!optval || (len < sizeof(*crypto_info))) { 3213c4d7559SDave Watson rc = -EINVAL; 3223c4d7559SDave Watson goto out; 3233c4d7559SDave Watson } 3243c4d7559SDave Watson 3253c4d7559SDave Watson if (!ctx) { 3263c4d7559SDave Watson rc = -EBUSY; 3273c4d7559SDave Watson goto out; 3283c4d7559SDave Watson } 3293c4d7559SDave Watson 3303c4d7559SDave Watson /* get user crypto info */ 33186029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 3323c4d7559SDave Watson 3333c4d7559SDave Watson if (!TLS_CRYPTO_INFO_READY(crypto_info)) { 3343c4d7559SDave Watson rc = -EBUSY; 3353c4d7559SDave Watson goto out; 3363c4d7559SDave Watson } 3373c4d7559SDave Watson 3385a3b886cSMatthias Rosenfelder if (len == sizeof(*crypto_info)) { 339ac55cd61SDan Carpenter if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) 340ac55cd61SDan Carpenter rc = -EFAULT; 3413c4d7559SDave Watson goto out; 3423c4d7559SDave Watson } 3433c4d7559SDave Watson 3443c4d7559SDave Watson switch (crypto_info->cipher_type) { 3453c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 3463c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128 * 3473c4d7559SDave Watson crypto_info_aes_gcm_128 = 3483c4d7559SDave Watson container_of(crypto_info, 3493c4d7559SDave Watson struct tls12_crypto_info_aes_gcm_128, 3503c4d7559SDave Watson info); 3513c4d7559SDave Watson 3523c4d7559SDave Watson if (len != sizeof(*crypto_info_aes_gcm_128)) { 3533c4d7559SDave Watson rc = -EINVAL; 3543c4d7559SDave Watson goto out; 3553c4d7559SDave Watson } 3563c4d7559SDave Watson lock_sock(sk); 357a1dfa681SBoris Pismenny memcpy(crypto_info_aes_gcm_128->iv, 358dbe42559SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, 3593c4d7559SDave Watson TLS_CIPHER_AES_GCM_128_IV_SIZE); 360dbe42559SDave Watson memcpy(crypto_info_aes_gcm_128->rec_seq, ctx->tx.rec_seq, 361c410c196SBoris Pismenny TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE); 3623c4d7559SDave Watson release_sock(sk); 363ac55cd61SDan Carpenter if (copy_to_user(optval, 3643c4d7559SDave Watson crypto_info_aes_gcm_128, 365ac55cd61SDan Carpenter sizeof(*crypto_info_aes_gcm_128))) 366ac55cd61SDan Carpenter rc = -EFAULT; 3673c4d7559SDave Watson break; 3683c4d7559SDave Watson } 3693c4d7559SDave Watson default: 3703c4d7559SDave Watson rc = -EINVAL; 3713c4d7559SDave Watson } 3723c4d7559SDave Watson 3733c4d7559SDave Watson out: 3743c4d7559SDave Watson return rc; 3753c4d7559SDave Watson } 3763c4d7559SDave Watson 3773c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 3783c4d7559SDave Watson char __user *optval, int __user *optlen) 3793c4d7559SDave Watson { 3803c4d7559SDave Watson int rc = 0; 3813c4d7559SDave Watson 3823c4d7559SDave Watson switch (optname) { 3833c4d7559SDave Watson case TLS_TX: 3843c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 3853c4d7559SDave Watson break; 3863c4d7559SDave Watson default: 3873c4d7559SDave Watson rc = -ENOPROTOOPT; 3883c4d7559SDave Watson break; 3893c4d7559SDave Watson } 3903c4d7559SDave Watson return rc; 3913c4d7559SDave Watson } 3923c4d7559SDave Watson 3933c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 3943c4d7559SDave Watson char __user *optval, int __user *optlen) 3953c4d7559SDave Watson { 3963c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 3973c4d7559SDave Watson 3983c4d7559SDave Watson if (level != SOL_TLS) 3993c4d7559SDave Watson return ctx->getsockopt(sk, level, optname, optval, optlen); 4003c4d7559SDave Watson 4013c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 4023c4d7559SDave Watson } 4033c4d7559SDave Watson 404c46234ebSDave Watson static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, 405c46234ebSDave Watson unsigned int optlen, int tx) 4063c4d7559SDave Watson { 407196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4083c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4093c4d7559SDave Watson int rc = 0; 41058371585SDave Watson int conf; 4113c4d7559SDave Watson 4123c4d7559SDave Watson if (!optval || (optlen < sizeof(*crypto_info))) { 4133c4d7559SDave Watson rc = -EINVAL; 4143c4d7559SDave Watson goto out; 4153c4d7559SDave Watson } 4163c4d7559SDave Watson 417c46234ebSDave Watson if (tx) 41886029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 419c46234ebSDave Watson else 42086029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 421c46234ebSDave Watson 422196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 423877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 424877d17c7SSabrina Dubroca rc = -EBUSY; 425196c31b4SIlya Lesokhin goto out; 426877d17c7SSabrina Dubroca } 427196c31b4SIlya Lesokhin 428196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); 4293c4d7559SDave Watson if (rc) { 4303c4d7559SDave Watson rc = -EFAULT; 431257082e6SBoris Pismenny goto err_crypto_info; 4323c4d7559SDave Watson } 4333c4d7559SDave Watson 4343c4d7559SDave Watson /* check version */ 435196c31b4SIlya Lesokhin if (crypto_info->version != TLS_1_2_VERSION) { 4363c4d7559SDave Watson rc = -ENOTSUPP; 437196c31b4SIlya Lesokhin goto err_crypto_info; 4383c4d7559SDave Watson } 4393c4d7559SDave Watson 440196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 4413c4d7559SDave Watson case TLS_CIPHER_AES_GCM_128: { 4423c4d7559SDave Watson if (optlen != sizeof(struct tls12_crypto_info_aes_gcm_128)) { 4433c4d7559SDave Watson rc = -EINVAL; 4446db959c8SSabrina Dubroca goto err_crypto_info; 4453c4d7559SDave Watson } 446196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), 447196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 4483c4d7559SDave Watson if (rc) { 4493c4d7559SDave Watson rc = -EFAULT; 4503c4d7559SDave Watson goto err_crypto_info; 4513c4d7559SDave Watson } 4523c4d7559SDave Watson break; 4533c4d7559SDave Watson } 4543c4d7559SDave Watson default: 4553c4d7559SDave Watson rc = -EINVAL; 4566db959c8SSabrina Dubroca goto err_crypto_info; 4573c4d7559SDave Watson } 4583c4d7559SDave Watson 459c46234ebSDave Watson if (tx) { 460e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 461e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 462e8f69799SIlya Lesokhin conf = TLS_HW; 463e8f69799SIlya Lesokhin if (rc) { 464e8f69799SIlya Lesokhin #else 465e8f69799SIlya Lesokhin { 466e8f69799SIlya Lesokhin #endif 467c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 468f66de3eeSBoris Pismenny conf = TLS_SW; 469e8f69799SIlya Lesokhin } 470c46234ebSDave Watson } else { 4714799ac81SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 4724799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 4734799ac81SBoris Pismenny conf = TLS_HW; 4744799ac81SBoris Pismenny if (rc) { 4754799ac81SBoris Pismenny #else 4764799ac81SBoris Pismenny { 4774799ac81SBoris Pismenny #endif 478c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 479f66de3eeSBoris Pismenny conf = TLS_SW; 480c46234ebSDave Watson } 4814799ac81SBoris Pismenny } 482c46234ebSDave Watson 4833c4d7559SDave Watson if (rc) 4843c4d7559SDave Watson goto err_crypto_info; 4853c4d7559SDave Watson 486f66de3eeSBoris Pismenny if (tx) 487f66de3eeSBoris Pismenny ctx->tx_conf = conf; 488f66de3eeSBoris Pismenny else 489f66de3eeSBoris Pismenny ctx->rx_conf = conf; 4906d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 491c46234ebSDave Watson if (tx) { 492ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 493ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 494c46234ebSDave Watson } else { 495c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 496c46234ebSDave Watson } 4973c4d7559SDave Watson goto out; 4983c4d7559SDave Watson 4993c4d7559SDave Watson err_crypto_info: 500c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 5013c4d7559SDave Watson out: 5023c4d7559SDave Watson return rc; 5033c4d7559SDave Watson } 5043c4d7559SDave Watson 5053c4d7559SDave Watson static int do_tls_setsockopt(struct sock *sk, int optname, 5063c4d7559SDave Watson char __user *optval, unsigned int optlen) 5073c4d7559SDave Watson { 5083c4d7559SDave Watson int rc = 0; 5093c4d7559SDave Watson 5103c4d7559SDave Watson switch (optname) { 5113c4d7559SDave Watson case TLS_TX: 512c46234ebSDave Watson case TLS_RX: 5133c4d7559SDave Watson lock_sock(sk); 514c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 515c46234ebSDave Watson optname == TLS_TX); 5163c4d7559SDave Watson release_sock(sk); 5173c4d7559SDave Watson break; 5183c4d7559SDave Watson default: 5193c4d7559SDave Watson rc = -ENOPROTOOPT; 5203c4d7559SDave Watson break; 5213c4d7559SDave Watson } 5223c4d7559SDave Watson return rc; 5233c4d7559SDave Watson } 5243c4d7559SDave Watson 5253c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 5263c4d7559SDave Watson char __user *optval, unsigned int optlen) 5273c4d7559SDave Watson { 5283c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 5293c4d7559SDave Watson 5303c4d7559SDave Watson if (level != SOL_TLS) 5313c4d7559SDave Watson return ctx->setsockopt(sk, level, optname, optval, optlen); 5323c4d7559SDave Watson 5333c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 5343c4d7559SDave Watson } 5353c4d7559SDave Watson 536dd0bed16SAtul Gupta static struct tls_context *create_ctx(struct sock *sk) 537dd0bed16SAtul Gupta { 538dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 539dd0bed16SAtul Gupta struct tls_context *ctx; 540dd0bed16SAtul Gupta 541dd0bed16SAtul Gupta ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 542dd0bed16SAtul Gupta if (!ctx) 543dd0bed16SAtul Gupta return NULL; 544dd0bed16SAtul Gupta 545dd0bed16SAtul Gupta icsk->icsk_ulp_data = ctx; 5466c0563e4SAtul Gupta ctx->setsockopt = sk->sk_prot->setsockopt; 5476c0563e4SAtul Gupta ctx->getsockopt = sk->sk_prot->getsockopt; 5486c0563e4SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 549dd0bed16SAtul Gupta return ctx; 550dd0bed16SAtul Gupta } 551dd0bed16SAtul Gupta 552dd0bed16SAtul Gupta static int tls_hw_prot(struct sock *sk) 553dd0bed16SAtul Gupta { 554dd0bed16SAtul Gupta struct tls_context *ctx; 555dd0bed16SAtul Gupta struct tls_device *dev; 556dd0bed16SAtul Gupta int rc = 0; 557dd0bed16SAtul Gupta 558dd0bed16SAtul Gupta mutex_lock(&device_mutex); 559dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 560dd0bed16SAtul Gupta if (dev->feature && dev->feature(dev)) { 561dd0bed16SAtul Gupta ctx = create_ctx(sk); 562dd0bed16SAtul Gupta if (!ctx) 563dd0bed16SAtul Gupta goto out; 564dd0bed16SAtul Gupta 565dd0bed16SAtul Gupta ctx->hash = sk->sk_prot->hash; 566dd0bed16SAtul Gupta ctx->unhash = sk->sk_prot->unhash; 567dd0bed16SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 568f66de3eeSBoris Pismenny ctx->rx_conf = TLS_HW_RECORD; 569f66de3eeSBoris Pismenny ctx->tx_conf = TLS_HW_RECORD; 570dd0bed16SAtul Gupta update_sk_prot(sk, ctx); 571dd0bed16SAtul Gupta rc = 1; 572dd0bed16SAtul Gupta break; 573dd0bed16SAtul Gupta } 574dd0bed16SAtul Gupta } 575dd0bed16SAtul Gupta out: 576dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 577dd0bed16SAtul Gupta return rc; 578dd0bed16SAtul Gupta } 579dd0bed16SAtul Gupta 580dd0bed16SAtul Gupta static void tls_hw_unhash(struct sock *sk) 581dd0bed16SAtul Gupta { 582dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 583dd0bed16SAtul Gupta struct tls_device *dev; 584dd0bed16SAtul Gupta 585dd0bed16SAtul Gupta mutex_lock(&device_mutex); 586dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 587dd0bed16SAtul Gupta if (dev->unhash) 588dd0bed16SAtul Gupta dev->unhash(dev, sk); 589dd0bed16SAtul Gupta } 590dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 591dd0bed16SAtul Gupta ctx->unhash(sk); 592dd0bed16SAtul Gupta } 593dd0bed16SAtul Gupta 594dd0bed16SAtul Gupta static int tls_hw_hash(struct sock *sk) 595dd0bed16SAtul Gupta { 596dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 597dd0bed16SAtul Gupta struct tls_device *dev; 598dd0bed16SAtul Gupta int err; 599dd0bed16SAtul Gupta 600dd0bed16SAtul Gupta err = ctx->hash(sk); 601dd0bed16SAtul Gupta mutex_lock(&device_mutex); 602dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 603dd0bed16SAtul Gupta if (dev->hash) 604dd0bed16SAtul Gupta err |= dev->hash(dev, sk); 605dd0bed16SAtul Gupta } 606dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 607dd0bed16SAtul Gupta 608dd0bed16SAtul Gupta if (err) 609dd0bed16SAtul Gupta tls_hw_unhash(sk); 610dd0bed16SAtul Gupta return err; 611dd0bed16SAtul Gupta } 612dd0bed16SAtul Gupta 613f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 614f66de3eeSBoris Pismenny struct proto *base) 615c113187dSBoris Pismenny { 616f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 617f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 618f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 619f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 620c113187dSBoris Pismenny 621f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 622f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 623f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 624c46234ebSDave Watson 625f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 626f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 627924ad65eSJohn Fastabend prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read; 628f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 629c46234ebSDave Watson 630f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 631f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 632924ad65eSJohn Fastabend prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read; 633f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 634dd0bed16SAtul Gupta 635e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 636e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 637e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 638e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 639e8f69799SIlya Lesokhin 640e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 641e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 642e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 6434799ac81SBoris Pismenny 6444799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 6454799ac81SBoris Pismenny 6464799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 6474799ac81SBoris Pismenny 6484799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 649e8f69799SIlya Lesokhin #endif 650e8f69799SIlya Lesokhin 651f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 652f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash; 653f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash; 654f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].close = tls_sk_proto_close; 655c113187dSBoris Pismenny } 656c113187dSBoris Pismenny 6573c4d7559SDave Watson static int tls_init(struct sock *sk) 6583c4d7559SDave Watson { 659c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 6603c4d7559SDave Watson struct tls_context *ctx; 6613c4d7559SDave Watson int rc = 0; 6623c4d7559SDave Watson 663dd0bed16SAtul Gupta if (tls_hw_prot(sk)) 664dd0bed16SAtul Gupta goto out; 665dd0bed16SAtul Gupta 666d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 667d91c3e17SIlya Lesokhin * in ESTABLISHED state. 668d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 669d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 670d91c3e17SIlya Lesokhin * share the ulp context. 671d91c3e17SIlya Lesokhin */ 672d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 673d91c3e17SIlya Lesokhin return -ENOTSUPP; 674d91c3e17SIlya Lesokhin 6753c4d7559SDave Watson /* allocate tls context */ 676dd0bed16SAtul Gupta ctx = create_ctx(sk); 6773c4d7559SDave Watson if (!ctx) { 6783c4d7559SDave Watson rc = -ENOMEM; 6793c4d7559SDave Watson goto out; 6803c4d7559SDave Watson } 6816d88207fSIlya Lesokhin 682c113187dSBoris Pismenny /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 683c113187dSBoris Pismenny if (ip_ver == TLSV6 && 684c113187dSBoris Pismenny unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { 685c113187dSBoris Pismenny mutex_lock(&tcpv6_prot_mutex); 686c113187dSBoris Pismenny if (likely(sk->sk_prot != saved_tcpv6_prot)) { 687c113187dSBoris Pismenny build_protos(tls_prots[TLSV6], sk->sk_prot); 688c113187dSBoris Pismenny smp_store_release(&saved_tcpv6_prot, sk->sk_prot); 689c113187dSBoris Pismenny } 690c113187dSBoris Pismenny mutex_unlock(&tcpv6_prot_mutex); 691c113187dSBoris Pismenny } 692c113187dSBoris Pismenny 693f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 694f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 6956d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 6963c4d7559SDave Watson out: 6973c4d7559SDave Watson return rc; 6983c4d7559SDave Watson } 6993c4d7559SDave Watson 700dd0bed16SAtul Gupta void tls_register_device(struct tls_device *device) 701dd0bed16SAtul Gupta { 702dd0bed16SAtul Gupta mutex_lock(&device_mutex); 703dd0bed16SAtul Gupta list_add_tail(&device->dev_list, &device_list); 704dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 705dd0bed16SAtul Gupta } 706dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_register_device); 707dd0bed16SAtul Gupta 708dd0bed16SAtul Gupta void tls_unregister_device(struct tls_device *device) 709dd0bed16SAtul Gupta { 710dd0bed16SAtul Gupta mutex_lock(&device_mutex); 711dd0bed16SAtul Gupta list_del(&device->dev_list); 712dd0bed16SAtul Gupta mutex_unlock(&device_mutex); 713dd0bed16SAtul Gupta } 714dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_unregister_device); 715dd0bed16SAtul Gupta 7163c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 7173c4d7559SDave Watson .name = "tls", 7183c4d7559SDave Watson .owner = THIS_MODULE, 7193c4d7559SDave Watson .init = tls_init, 7203c4d7559SDave Watson }; 7213c4d7559SDave Watson 7223c4d7559SDave Watson static int __init tls_register(void) 7233c4d7559SDave Watson { 724c113187dSBoris Pismenny build_protos(tls_prots[TLSV4], &tcp_prot); 7253c4d7559SDave Watson 726c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 727c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 728c46234ebSDave Watson 729e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 730e8f69799SIlya Lesokhin tls_device_init(); 731e8f69799SIlya Lesokhin #endif 7323c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 7333c4d7559SDave Watson 7343c4d7559SDave Watson return 0; 7353c4d7559SDave Watson } 7363c4d7559SDave Watson 7373c4d7559SDave Watson static void __exit tls_unregister(void) 7383c4d7559SDave Watson { 7393c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 740e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 741e8f69799SIlya Lesokhin tls_device_cleanup(); 742e8f69799SIlya Lesokhin #endif 7433c4d7559SDave Watson } 7443c4d7559SDave Watson 7453c4d7559SDave Watson module_init(tls_register); 7463c4d7559SDave Watson module_exit(tls_unregister); 747