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); 5828cb6f1eSJohn Fastabend static struct proto *saved_tcpv4_prot; 5928cb6f1eSJohn Fastabend static DEFINE_MUTEX(tcpv4_prot_mutex); 60dd0bed16SAtul Gupta static LIST_HEAD(device_list); 61df9d4a17SAtul Gupta static DEFINE_SPINLOCK(device_spinlock); 62f66de3eeSBoris Pismenny static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG]; 63c46234ebSDave Watson static struct proto_ops tls_sw_proto_ops; 6463a6b3feSAtul Gupta static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 6563a6b3feSAtul Gupta struct proto *base); 666d88207fSIlya Lesokhin 67f66de3eeSBoris Pismenny static void update_sk_prot(struct sock *sk, struct tls_context *ctx) 686d88207fSIlya Lesokhin { 69c113187dSBoris Pismenny int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 70c113187dSBoris Pismenny 71f66de3eeSBoris Pismenny sk->sk_prot = &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]; 726d88207fSIlya Lesokhin } 733c4d7559SDave Watson 743c4d7559SDave Watson int wait_on_pending_writer(struct sock *sk, long *timeo) 753c4d7559SDave Watson { 763c4d7559SDave Watson int rc = 0; 773c4d7559SDave Watson DEFINE_WAIT_FUNC(wait, woken_wake_function); 783c4d7559SDave Watson 793c4d7559SDave Watson add_wait_queue(sk_sleep(sk), &wait); 803c4d7559SDave Watson while (1) { 813c4d7559SDave Watson if (!*timeo) { 823c4d7559SDave Watson rc = -EAGAIN; 833c4d7559SDave Watson break; 843c4d7559SDave Watson } 853c4d7559SDave Watson 863c4d7559SDave Watson if (signal_pending(current)) { 873c4d7559SDave Watson rc = sock_intr_errno(*timeo); 883c4d7559SDave Watson break; 893c4d7559SDave Watson } 903c4d7559SDave Watson 913c4d7559SDave Watson if (sk_wait_event(sk, timeo, !sk->sk_write_pending, &wait)) 923c4d7559SDave Watson break; 933c4d7559SDave Watson } 943c4d7559SDave Watson remove_wait_queue(sk_sleep(sk), &wait); 953c4d7559SDave Watson return rc; 963c4d7559SDave Watson } 973c4d7559SDave Watson 983c4d7559SDave Watson int tls_push_sg(struct sock *sk, 993c4d7559SDave Watson struct tls_context *ctx, 1003c4d7559SDave Watson struct scatterlist *sg, 1013c4d7559SDave Watson u16 first_offset, 1023c4d7559SDave Watson int flags) 1033c4d7559SDave Watson { 1043c4d7559SDave Watson int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST; 1053c4d7559SDave Watson int ret = 0; 1063c4d7559SDave Watson struct page *p; 1073c4d7559SDave Watson size_t size; 1083c4d7559SDave Watson int offset = first_offset; 1093c4d7559SDave Watson 1103c4d7559SDave Watson size = sg->length - offset; 1113c4d7559SDave Watson offset += sg->offset; 1123c4d7559SDave Watson 113c212d2c7SDave Watson ctx->in_tcp_sendpages = true; 1143c4d7559SDave Watson while (1) { 1153c4d7559SDave Watson if (sg_is_last(sg)) 1163c4d7559SDave Watson sendpage_flags = flags; 1173c4d7559SDave Watson 1183c4d7559SDave Watson /* is sending application-limited? */ 1193c4d7559SDave Watson tcp_rate_check_app_limited(sk); 1203c4d7559SDave Watson p = sg_page(sg); 1213c4d7559SDave Watson retry: 1223c4d7559SDave Watson ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags); 1233c4d7559SDave Watson 1243c4d7559SDave Watson if (ret != size) { 1253c4d7559SDave Watson if (ret > 0) { 1263c4d7559SDave Watson offset += ret; 1273c4d7559SDave Watson size -= ret; 1283c4d7559SDave Watson goto retry; 1293c4d7559SDave Watson } 1303c4d7559SDave Watson 1313c4d7559SDave Watson offset -= sg->offset; 1323c4d7559SDave Watson ctx->partially_sent_offset = offset; 1333c4d7559SDave Watson ctx->partially_sent_record = (void *)sg; 134080324c3SAndre Tomt ctx->in_tcp_sendpages = false; 1353c4d7559SDave Watson return ret; 1363c4d7559SDave Watson } 1373c4d7559SDave Watson 1383c4d7559SDave Watson put_page(p); 1393c4d7559SDave Watson sk_mem_uncharge(sk, sg->length); 1403c4d7559SDave Watson sg = sg_next(sg); 1413c4d7559SDave Watson if (!sg) 1423c4d7559SDave Watson break; 1433c4d7559SDave Watson 1443c4d7559SDave Watson offset = sg->offset; 1453c4d7559SDave Watson size = sg->length; 1463c4d7559SDave Watson } 1473c4d7559SDave Watson 148c212d2c7SDave Watson ctx->in_tcp_sendpages = false; 1493c4d7559SDave Watson 1503c4d7559SDave Watson return 0; 1513c4d7559SDave Watson } 1523c4d7559SDave Watson 1533c4d7559SDave Watson static int tls_handle_open_record(struct sock *sk, int flags) 1543c4d7559SDave Watson { 1553c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 1563c4d7559SDave Watson 1573c4d7559SDave Watson if (tls_is_pending_open_record(ctx)) 1583c4d7559SDave Watson return ctx->push_pending_record(sk, flags); 1593c4d7559SDave Watson 1603c4d7559SDave Watson return 0; 1613c4d7559SDave Watson } 1623c4d7559SDave Watson 1633c4d7559SDave Watson int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg, 1643c4d7559SDave Watson unsigned char *record_type) 1653c4d7559SDave Watson { 1663c4d7559SDave Watson struct cmsghdr *cmsg; 1673c4d7559SDave Watson int rc = -EINVAL; 1683c4d7559SDave Watson 1693c4d7559SDave Watson for_each_cmsghdr(cmsg, msg) { 1703c4d7559SDave Watson if (!CMSG_OK(msg, cmsg)) 1713c4d7559SDave Watson return -EINVAL; 1723c4d7559SDave Watson if (cmsg->cmsg_level != SOL_TLS) 1733c4d7559SDave Watson continue; 1743c4d7559SDave Watson 1753c4d7559SDave Watson switch (cmsg->cmsg_type) { 1763c4d7559SDave Watson case TLS_SET_RECORD_TYPE: 1773c4d7559SDave Watson if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type))) 1783c4d7559SDave Watson return -EINVAL; 1793c4d7559SDave Watson 1803c4d7559SDave Watson if (msg->msg_flags & MSG_MORE) 1813c4d7559SDave Watson return -EINVAL; 1823c4d7559SDave Watson 1833c4d7559SDave Watson rc = tls_handle_open_record(sk, msg->msg_flags); 1843c4d7559SDave Watson if (rc) 1853c4d7559SDave Watson return rc; 1863c4d7559SDave Watson 1873c4d7559SDave Watson *record_type = *(unsigned char *)CMSG_DATA(cmsg); 1883c4d7559SDave Watson rc = 0; 1893c4d7559SDave Watson break; 1903c4d7559SDave Watson default: 1913c4d7559SDave Watson return -EINVAL; 1923c4d7559SDave Watson } 1933c4d7559SDave Watson } 1943c4d7559SDave Watson 1953c4d7559SDave Watson return rc; 1963c4d7559SDave Watson } 1973c4d7559SDave Watson 198a42055e8SVakul Garg int tls_push_partial_record(struct sock *sk, struct tls_context *ctx, 199a42055e8SVakul Garg int flags) 2003c4d7559SDave Watson { 2013c4d7559SDave Watson struct scatterlist *sg; 2023c4d7559SDave Watson u16 offset; 2033c4d7559SDave Watson 2043c4d7559SDave Watson sg = ctx->partially_sent_record; 2053c4d7559SDave Watson offset = ctx->partially_sent_offset; 2063c4d7559SDave Watson 2073c4d7559SDave Watson ctx->partially_sent_record = NULL; 2083c4d7559SDave Watson return tls_push_sg(sk, ctx, sg, offset, flags); 2093c4d7559SDave Watson } 2103c4d7559SDave Watson 21135b71a34SJakub Kicinski bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx) 21235b71a34SJakub Kicinski { 21335b71a34SJakub Kicinski struct scatterlist *sg; 21435b71a34SJakub Kicinski 21535b71a34SJakub Kicinski sg = ctx->partially_sent_record; 21635b71a34SJakub Kicinski if (!sg) 21735b71a34SJakub Kicinski return false; 21835b71a34SJakub Kicinski 21935b71a34SJakub Kicinski while (1) { 22035b71a34SJakub Kicinski put_page(sg_page(sg)); 22135b71a34SJakub Kicinski sk_mem_uncharge(sk, sg->length); 22235b71a34SJakub Kicinski 22335b71a34SJakub Kicinski if (sg_is_last(sg)) 22435b71a34SJakub Kicinski break; 22535b71a34SJakub Kicinski sg++; 22635b71a34SJakub Kicinski } 22735b71a34SJakub Kicinski ctx->partially_sent_record = NULL; 22835b71a34SJakub Kicinski return true; 22935b71a34SJakub Kicinski } 23035b71a34SJakub Kicinski 2313c4d7559SDave Watson static void tls_write_space(struct sock *sk) 2323c4d7559SDave Watson { 2333c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2343c4d7559SDave Watson 23567db7cd2SJohn Fastabend /* If in_tcp_sendpages call lower protocol write space handler 23667db7cd2SJohn Fastabend * to ensure we wake up any waiting operations there. For example 23767db7cd2SJohn Fastabend * if do_tcp_sendpages where to call sk_wait_event. 23867db7cd2SJohn Fastabend */ 23967db7cd2SJohn Fastabend if (ctx->in_tcp_sendpages) { 24067db7cd2SJohn Fastabend ctx->sk_write_space(sk); 241c212d2c7SDave Watson return; 24267db7cd2SJohn Fastabend } 243c212d2c7SDave Watson 2447463d3a2SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 2457463d3a2SBoris Pismenny if (ctx->tx_conf == TLS_HW) 2467463d3a2SBoris Pismenny tls_device_write_space(sk, ctx); 2477463d3a2SBoris Pismenny else 2487463d3a2SBoris Pismenny #endif 2497463d3a2SBoris Pismenny tls_sw_write_space(sk, ctx); 2504504ab0eSVakul Garg 2514504ab0eSVakul Garg ctx->sk_write_space(sk); 2523c4d7559SDave Watson } 2533c4d7559SDave Watson 25486029d10SSabrina Dubroca static void tls_ctx_free(struct tls_context *ctx) 25586029d10SSabrina Dubroca { 25686029d10SSabrina Dubroca if (!ctx) 25786029d10SSabrina Dubroca return; 25886029d10SSabrina Dubroca 25986029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send)); 26086029d10SSabrina Dubroca memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv)); 26186029d10SSabrina Dubroca kfree(ctx); 26286029d10SSabrina Dubroca } 26386029d10SSabrina Dubroca 2643c4d7559SDave Watson static void tls_sk_proto_close(struct sock *sk, long timeout) 2653c4d7559SDave Watson { 2663c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 2673c4d7559SDave Watson long timeo = sock_sndtimeo(sk, 0); 2683c4d7559SDave Watson void (*sk_proto_close)(struct sock *sk, long timeout); 26998f0a395SEric Dumazet bool free_ctx = false; 2703c4d7559SDave Watson 2713c4d7559SDave Watson lock_sock(sk); 272ff45d820SIlya Lesokhin sk_proto_close = ctx->sk_proto_close; 273ff45d820SIlya Lesokhin 27476f7164dSAtul Gupta if (ctx->tx_conf == TLS_HW_RECORD && ctx->rx_conf == TLS_HW_RECORD) 27576f7164dSAtul Gupta goto skip_tx_cleanup; 27676f7164dSAtul Gupta 27776f7164dSAtul Gupta if (ctx->tx_conf == TLS_BASE && ctx->rx_conf == TLS_BASE) { 27898f0a395SEric Dumazet free_ctx = true; 279ff45d820SIlya Lesokhin goto skip_tx_cleanup; 280ff45d820SIlya Lesokhin } 2813c4d7559SDave Watson 2823c4d7559SDave Watson if (!tls_complete_pending_work(sk, ctx, 0, &timeo)) 2833c4d7559SDave Watson tls_handle_open_record(sk, 0); 2843c4d7559SDave Watson 285f66de3eeSBoris Pismenny /* We need these for tls_sw_fallback handling of other packets */ 286f66de3eeSBoris Pismenny if (ctx->tx_conf == TLS_SW) { 287dbe42559SDave Watson kfree(ctx->tx.rec_seq); 288dbe42559SDave Watson kfree(ctx->tx.iv); 289f66de3eeSBoris Pismenny tls_sw_free_resources_tx(sk); 290903f1a18SJakub Kicinski #ifdef CONFIG_TLS_DEVICE 29135b71a34SJakub Kicinski } else if (ctx->tx_conf == TLS_HW) { 29235b71a34SJakub Kicinski tls_device_free_resources_tx(sk); 293903f1a18SJakub Kicinski #endif 294f66de3eeSBoris Pismenny } 295f66de3eeSBoris Pismenny 29612c76861SJakub Kicinski if (ctx->rx_conf == TLS_SW) 297f66de3eeSBoris Pismenny tls_sw_free_resources_rx(sk); 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 } 381fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 382fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256 * 383fb99bce7SDave Watson crypto_info_aes_gcm_256 = 384fb99bce7SDave Watson container_of(crypto_info, 385fb99bce7SDave Watson struct tls12_crypto_info_aes_gcm_256, 386fb99bce7SDave Watson info); 387fb99bce7SDave Watson 388fb99bce7SDave Watson if (len != sizeof(*crypto_info_aes_gcm_256)) { 389fb99bce7SDave Watson rc = -EINVAL; 390fb99bce7SDave Watson goto out; 391fb99bce7SDave Watson } 392fb99bce7SDave Watson lock_sock(sk); 393fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->iv, 394fb99bce7SDave Watson ctx->tx.iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE, 395fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_IV_SIZE); 396fb99bce7SDave Watson memcpy(crypto_info_aes_gcm_256->rec_seq, ctx->tx.rec_seq, 397fb99bce7SDave Watson TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE); 398fb99bce7SDave Watson release_sock(sk); 399fb99bce7SDave Watson if (copy_to_user(optval, 400fb99bce7SDave Watson crypto_info_aes_gcm_256, 401fb99bce7SDave Watson sizeof(*crypto_info_aes_gcm_256))) 402fb99bce7SDave Watson rc = -EFAULT; 403fb99bce7SDave Watson break; 404fb99bce7SDave Watson } 4053c4d7559SDave Watson default: 4063c4d7559SDave Watson rc = -EINVAL; 4073c4d7559SDave Watson } 4083c4d7559SDave Watson 4093c4d7559SDave Watson out: 4103c4d7559SDave Watson return rc; 4113c4d7559SDave Watson } 4123c4d7559SDave Watson 4133c4d7559SDave Watson static int do_tls_getsockopt(struct sock *sk, int optname, 4143c4d7559SDave Watson char __user *optval, int __user *optlen) 4153c4d7559SDave Watson { 4163c4d7559SDave Watson int rc = 0; 4173c4d7559SDave Watson 4183c4d7559SDave Watson switch (optname) { 4193c4d7559SDave Watson case TLS_TX: 4203c4d7559SDave Watson rc = do_tls_getsockopt_tx(sk, optval, optlen); 4213c4d7559SDave Watson break; 4223c4d7559SDave Watson default: 4233c4d7559SDave Watson rc = -ENOPROTOOPT; 4243c4d7559SDave Watson break; 4253c4d7559SDave Watson } 4263c4d7559SDave Watson return rc; 4273c4d7559SDave Watson } 4283c4d7559SDave Watson 4293c4d7559SDave Watson static int tls_getsockopt(struct sock *sk, int level, int optname, 4303c4d7559SDave Watson char __user *optval, int __user *optlen) 4313c4d7559SDave Watson { 4323c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 4333c4d7559SDave Watson 4343c4d7559SDave Watson if (level != SOL_TLS) 4353c4d7559SDave Watson return ctx->getsockopt(sk, level, optname, optval, optlen); 4363c4d7559SDave Watson 4373c4d7559SDave Watson return do_tls_getsockopt(sk, optname, optval, optlen); 4383c4d7559SDave Watson } 4393c4d7559SDave Watson 440c46234ebSDave Watson static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval, 441c46234ebSDave Watson unsigned int optlen, int tx) 4423c4d7559SDave Watson { 443196c31b4SIlya Lesokhin struct tls_crypto_info *crypto_info; 4444509de14SVakul Garg struct tls_crypto_info *alt_crypto_info; 4453c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 446fb99bce7SDave Watson size_t optsize; 4473c4d7559SDave Watson int rc = 0; 44858371585SDave Watson int conf; 4493c4d7559SDave Watson 4503c4d7559SDave Watson if (!optval || (optlen < sizeof(*crypto_info))) { 4513c4d7559SDave Watson rc = -EINVAL; 4523c4d7559SDave Watson goto out; 4533c4d7559SDave Watson } 4543c4d7559SDave Watson 4554509de14SVakul Garg if (tx) { 45686029d10SSabrina Dubroca crypto_info = &ctx->crypto_send.info; 4574509de14SVakul Garg alt_crypto_info = &ctx->crypto_recv.info; 4584509de14SVakul Garg } else { 45986029d10SSabrina Dubroca crypto_info = &ctx->crypto_recv.info; 4604509de14SVakul Garg alt_crypto_info = &ctx->crypto_send.info; 4614509de14SVakul Garg } 462c46234ebSDave Watson 463196c31b4SIlya Lesokhin /* Currently we don't support set crypto info more than one time */ 464877d17c7SSabrina Dubroca if (TLS_CRYPTO_INFO_READY(crypto_info)) { 465877d17c7SSabrina Dubroca rc = -EBUSY; 466196c31b4SIlya Lesokhin goto out; 467877d17c7SSabrina Dubroca } 468196c31b4SIlya Lesokhin 469196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info, optval, sizeof(*crypto_info)); 4703c4d7559SDave Watson if (rc) { 4713c4d7559SDave Watson rc = -EFAULT; 472257082e6SBoris Pismenny goto err_crypto_info; 4733c4d7559SDave Watson } 4743c4d7559SDave Watson 4753c4d7559SDave Watson /* check version */ 476130b392cSDave Watson if (crypto_info->version != TLS_1_2_VERSION && 477130b392cSDave Watson crypto_info->version != TLS_1_3_VERSION) { 4783c4d7559SDave Watson rc = -ENOTSUPP; 479196c31b4SIlya Lesokhin goto err_crypto_info; 4803c4d7559SDave Watson } 4813c4d7559SDave Watson 4824509de14SVakul Garg /* Ensure that TLS version and ciphers are same in both directions */ 4834509de14SVakul Garg if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) { 4844509de14SVakul Garg if (alt_crypto_info->version != crypto_info->version || 4854509de14SVakul Garg alt_crypto_info->cipher_type != crypto_info->cipher_type) { 4864509de14SVakul Garg rc = -EINVAL; 4874509de14SVakul Garg goto err_crypto_info; 4884509de14SVakul Garg } 4894509de14SVakul Garg } 4904509de14SVakul Garg 491196c31b4SIlya Lesokhin switch (crypto_info->cipher_type) { 492fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_128: 493fb99bce7SDave Watson case TLS_CIPHER_AES_GCM_256: { 494fb99bce7SDave Watson optsize = crypto_info->cipher_type == TLS_CIPHER_AES_GCM_128 ? 495fb99bce7SDave Watson sizeof(struct tls12_crypto_info_aes_gcm_128) : 496fb99bce7SDave Watson sizeof(struct tls12_crypto_info_aes_gcm_256); 497fb99bce7SDave Watson if (optlen != optsize) { 4983c4d7559SDave Watson rc = -EINVAL; 4996db959c8SSabrina Dubroca goto err_crypto_info; 5003c4d7559SDave Watson } 501196c31b4SIlya Lesokhin rc = copy_from_user(crypto_info + 1, optval + sizeof(*crypto_info), 502196c31b4SIlya Lesokhin optlen - sizeof(*crypto_info)); 5033c4d7559SDave Watson if (rc) { 5043c4d7559SDave Watson rc = -EFAULT; 5053c4d7559SDave Watson goto err_crypto_info; 5063c4d7559SDave Watson } 5073c4d7559SDave Watson break; 5083c4d7559SDave Watson } 5093c4d7559SDave Watson default: 5103c4d7559SDave Watson rc = -EINVAL; 5116db959c8SSabrina Dubroca goto err_crypto_info; 5123c4d7559SDave Watson } 5133c4d7559SDave Watson 514c46234ebSDave Watson if (tx) { 515e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 516e8f69799SIlya Lesokhin rc = tls_set_device_offload(sk, ctx); 517e8f69799SIlya Lesokhin conf = TLS_HW; 518e8f69799SIlya Lesokhin if (rc) { 519e8f69799SIlya Lesokhin #else 520e8f69799SIlya Lesokhin { 521e8f69799SIlya Lesokhin #endif 522c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 1); 523f66de3eeSBoris Pismenny conf = TLS_SW; 524e8f69799SIlya Lesokhin } 525c46234ebSDave Watson } else { 5264799ac81SBoris Pismenny #ifdef CONFIG_TLS_DEVICE 5274799ac81SBoris Pismenny rc = tls_set_device_offload_rx(sk, ctx); 5284799ac81SBoris Pismenny conf = TLS_HW; 5294799ac81SBoris Pismenny if (rc) { 5304799ac81SBoris Pismenny #else 5314799ac81SBoris Pismenny { 5324799ac81SBoris Pismenny #endif 533c46234ebSDave Watson rc = tls_set_sw_offload(sk, ctx, 0); 534f66de3eeSBoris Pismenny conf = TLS_SW; 535c46234ebSDave Watson } 5364799ac81SBoris Pismenny } 537c46234ebSDave Watson 5383c4d7559SDave Watson if (rc) 5393c4d7559SDave Watson goto err_crypto_info; 5403c4d7559SDave Watson 541f66de3eeSBoris Pismenny if (tx) 542f66de3eeSBoris Pismenny ctx->tx_conf = conf; 543f66de3eeSBoris Pismenny else 544f66de3eeSBoris Pismenny ctx->rx_conf = conf; 5456d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 546c46234ebSDave Watson if (tx) { 547ee181e52SIlya Lesokhin ctx->sk_write_space = sk->sk_write_space; 548ee181e52SIlya Lesokhin sk->sk_write_space = tls_write_space; 549c46234ebSDave Watson } else { 550c46234ebSDave Watson sk->sk_socket->ops = &tls_sw_proto_ops; 551c46234ebSDave Watson } 5523c4d7559SDave Watson goto out; 5533c4d7559SDave Watson 5543c4d7559SDave Watson err_crypto_info: 555c844eb46SSabrina Dubroca memzero_explicit(crypto_info, sizeof(union tls_crypto_context)); 5563c4d7559SDave Watson out: 5573c4d7559SDave Watson return rc; 5583c4d7559SDave Watson } 5593c4d7559SDave Watson 5603c4d7559SDave Watson static int do_tls_setsockopt(struct sock *sk, int optname, 5613c4d7559SDave Watson char __user *optval, unsigned int optlen) 5623c4d7559SDave Watson { 5633c4d7559SDave Watson int rc = 0; 5643c4d7559SDave Watson 5653c4d7559SDave Watson switch (optname) { 5663c4d7559SDave Watson case TLS_TX: 567c46234ebSDave Watson case TLS_RX: 5683c4d7559SDave Watson lock_sock(sk); 569c46234ebSDave Watson rc = do_tls_setsockopt_conf(sk, optval, optlen, 570c46234ebSDave Watson optname == TLS_TX); 5713c4d7559SDave Watson release_sock(sk); 5723c4d7559SDave Watson break; 5733c4d7559SDave Watson default: 5743c4d7559SDave Watson rc = -ENOPROTOOPT; 5753c4d7559SDave Watson break; 5763c4d7559SDave Watson } 5773c4d7559SDave Watson return rc; 5783c4d7559SDave Watson } 5793c4d7559SDave Watson 5803c4d7559SDave Watson static int tls_setsockopt(struct sock *sk, int level, int optname, 5813c4d7559SDave Watson char __user *optval, unsigned int optlen) 5823c4d7559SDave Watson { 5833c4d7559SDave Watson struct tls_context *ctx = tls_get_ctx(sk); 5843c4d7559SDave Watson 5853c4d7559SDave Watson if (level != SOL_TLS) 5863c4d7559SDave Watson return ctx->setsockopt(sk, level, optname, optval, optlen); 5873c4d7559SDave Watson 5883c4d7559SDave Watson return do_tls_setsockopt(sk, optname, optval, optlen); 5893c4d7559SDave Watson } 5903c4d7559SDave Watson 591dd0bed16SAtul Gupta static struct tls_context *create_ctx(struct sock *sk) 592dd0bed16SAtul Gupta { 593dd0bed16SAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 594dd0bed16SAtul Gupta struct tls_context *ctx; 595dd0bed16SAtul Gupta 596c6ec179aSGanesh Goudar ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC); 597dd0bed16SAtul Gupta if (!ctx) 598dd0bed16SAtul Gupta return NULL; 599dd0bed16SAtul Gupta 600dd0bed16SAtul Gupta icsk->icsk_ulp_data = ctx; 6016c0563e4SAtul Gupta ctx->setsockopt = sk->sk_prot->setsockopt; 6026c0563e4SAtul Gupta ctx->getsockopt = sk->sk_prot->getsockopt; 6036c0563e4SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 604dd0bed16SAtul Gupta return ctx; 605dd0bed16SAtul Gupta } 606dd0bed16SAtul Gupta 60763a6b3feSAtul Gupta static void tls_build_proto(struct sock *sk) 60863a6b3feSAtul Gupta { 60963a6b3feSAtul Gupta int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4; 61063a6b3feSAtul Gupta 61163a6b3feSAtul Gupta /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */ 61263a6b3feSAtul Gupta if (ip_ver == TLSV6 && 61363a6b3feSAtul Gupta unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv6_prot))) { 61463a6b3feSAtul Gupta mutex_lock(&tcpv6_prot_mutex); 61563a6b3feSAtul Gupta if (likely(sk->sk_prot != saved_tcpv6_prot)) { 61663a6b3feSAtul Gupta build_protos(tls_prots[TLSV6], sk->sk_prot); 61763a6b3feSAtul Gupta smp_store_release(&saved_tcpv6_prot, sk->sk_prot); 61863a6b3feSAtul Gupta } 61963a6b3feSAtul Gupta mutex_unlock(&tcpv6_prot_mutex); 62063a6b3feSAtul Gupta } 62163a6b3feSAtul Gupta 62263a6b3feSAtul Gupta if (ip_ver == TLSV4 && 62363a6b3feSAtul Gupta unlikely(sk->sk_prot != smp_load_acquire(&saved_tcpv4_prot))) { 62463a6b3feSAtul Gupta mutex_lock(&tcpv4_prot_mutex); 62563a6b3feSAtul Gupta if (likely(sk->sk_prot != saved_tcpv4_prot)) { 62663a6b3feSAtul Gupta build_protos(tls_prots[TLSV4], sk->sk_prot); 62763a6b3feSAtul Gupta smp_store_release(&saved_tcpv4_prot, sk->sk_prot); 62863a6b3feSAtul Gupta } 62963a6b3feSAtul Gupta mutex_unlock(&tcpv4_prot_mutex); 63063a6b3feSAtul Gupta } 63163a6b3feSAtul Gupta } 63263a6b3feSAtul Gupta 63376f7164dSAtul Gupta static void tls_hw_sk_destruct(struct sock *sk) 63476f7164dSAtul Gupta { 63576f7164dSAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 63676f7164dSAtul Gupta struct inet_connection_sock *icsk = inet_csk(sk); 63776f7164dSAtul Gupta 63876f7164dSAtul Gupta ctx->sk_destruct(sk); 63976f7164dSAtul Gupta /* Free ctx */ 64076f7164dSAtul Gupta kfree(ctx); 64176f7164dSAtul Gupta icsk->icsk_ulp_data = NULL; 64276f7164dSAtul Gupta } 64376f7164dSAtul Gupta 644dd0bed16SAtul Gupta static int tls_hw_prot(struct sock *sk) 645dd0bed16SAtul Gupta { 646dd0bed16SAtul Gupta struct tls_context *ctx; 647dd0bed16SAtul Gupta struct tls_device *dev; 648dd0bed16SAtul Gupta int rc = 0; 649dd0bed16SAtul Gupta 650df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 651dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 652dd0bed16SAtul Gupta if (dev->feature && dev->feature(dev)) { 653dd0bed16SAtul Gupta ctx = create_ctx(sk); 654dd0bed16SAtul Gupta if (!ctx) 655dd0bed16SAtul Gupta goto out; 656dd0bed16SAtul Gupta 65763a6b3feSAtul Gupta spin_unlock_bh(&device_spinlock); 65863a6b3feSAtul Gupta tls_build_proto(sk); 659dd0bed16SAtul Gupta ctx->hash = sk->sk_prot->hash; 660dd0bed16SAtul Gupta ctx->unhash = sk->sk_prot->unhash; 661dd0bed16SAtul Gupta ctx->sk_proto_close = sk->sk_prot->close; 66276f7164dSAtul Gupta ctx->sk_destruct = sk->sk_destruct; 66376f7164dSAtul Gupta sk->sk_destruct = tls_hw_sk_destruct; 664f66de3eeSBoris Pismenny ctx->rx_conf = TLS_HW_RECORD; 665f66de3eeSBoris Pismenny ctx->tx_conf = TLS_HW_RECORD; 666dd0bed16SAtul Gupta update_sk_prot(sk, ctx); 66763a6b3feSAtul Gupta spin_lock_bh(&device_spinlock); 668dd0bed16SAtul Gupta rc = 1; 669dd0bed16SAtul Gupta break; 670dd0bed16SAtul Gupta } 671dd0bed16SAtul Gupta } 672dd0bed16SAtul Gupta out: 673df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 674dd0bed16SAtul Gupta return rc; 675dd0bed16SAtul Gupta } 676dd0bed16SAtul Gupta 677dd0bed16SAtul Gupta static void tls_hw_unhash(struct sock *sk) 678dd0bed16SAtul Gupta { 679dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 680dd0bed16SAtul Gupta struct tls_device *dev; 681dd0bed16SAtul Gupta 682df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 683dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 684df9d4a17SAtul Gupta if (dev->unhash) { 685df9d4a17SAtul Gupta kref_get(&dev->kref); 686df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 687dd0bed16SAtul Gupta dev->unhash(dev, sk); 688df9d4a17SAtul Gupta kref_put(&dev->kref, dev->release); 689df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 690dd0bed16SAtul Gupta } 691df9d4a17SAtul Gupta } 692df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 693dd0bed16SAtul Gupta ctx->unhash(sk); 694dd0bed16SAtul Gupta } 695dd0bed16SAtul Gupta 696dd0bed16SAtul Gupta static int tls_hw_hash(struct sock *sk) 697dd0bed16SAtul Gupta { 698dd0bed16SAtul Gupta struct tls_context *ctx = tls_get_ctx(sk); 699dd0bed16SAtul Gupta struct tls_device *dev; 700dd0bed16SAtul Gupta int err; 701dd0bed16SAtul Gupta 702dd0bed16SAtul Gupta err = ctx->hash(sk); 703df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 704dd0bed16SAtul Gupta list_for_each_entry(dev, &device_list, dev_list) { 705df9d4a17SAtul Gupta if (dev->hash) { 706df9d4a17SAtul Gupta kref_get(&dev->kref); 707df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 708dd0bed16SAtul Gupta err |= dev->hash(dev, sk); 709df9d4a17SAtul Gupta kref_put(&dev->kref, dev->release); 710df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 711dd0bed16SAtul Gupta } 712df9d4a17SAtul Gupta } 713df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 714dd0bed16SAtul Gupta 715dd0bed16SAtul Gupta if (err) 716dd0bed16SAtul Gupta tls_hw_unhash(sk); 717dd0bed16SAtul Gupta return err; 718dd0bed16SAtul Gupta } 719dd0bed16SAtul Gupta 720f66de3eeSBoris Pismenny static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG], 721f66de3eeSBoris Pismenny struct proto *base) 722c113187dSBoris Pismenny { 723f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE] = *base; 724f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt; 725f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt; 726f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close; 727c113187dSBoris Pismenny 728f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 729f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg; 730f66de3eeSBoris Pismenny prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage; 731c46234ebSDave Watson 732f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE]; 733f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg; 734924ad65eSJohn Fastabend prot[TLS_BASE][TLS_SW].stream_memory_read = tls_sw_stream_read; 735f66de3eeSBoris Pismenny prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close; 736c46234ebSDave Watson 737f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE]; 738f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg; 739924ad65eSJohn Fastabend prot[TLS_SW][TLS_SW].stream_memory_read = tls_sw_stream_read; 740f66de3eeSBoris Pismenny prot[TLS_SW][TLS_SW].close = tls_sk_proto_close; 741dd0bed16SAtul Gupta 742e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 743e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE]; 744e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg; 745e8f69799SIlya Lesokhin prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage; 746e8f69799SIlya Lesokhin 747e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW]; 748e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg; 749e8f69799SIlya Lesokhin prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage; 7504799ac81SBoris Pismenny 7514799ac81SBoris Pismenny prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW]; 7524799ac81SBoris Pismenny 7534799ac81SBoris Pismenny prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW]; 7544799ac81SBoris Pismenny 7554799ac81SBoris Pismenny prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW]; 756e8f69799SIlya Lesokhin #endif 757e8f69799SIlya Lesokhin 758f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base; 759f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_hw_hash; 760f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_hw_unhash; 761f66de3eeSBoris Pismenny prot[TLS_HW_RECORD][TLS_HW_RECORD].close = tls_sk_proto_close; 762c113187dSBoris Pismenny } 763c113187dSBoris Pismenny 7643c4d7559SDave Watson static int tls_init(struct sock *sk) 7653c4d7559SDave Watson { 7663c4d7559SDave Watson struct tls_context *ctx; 7673c4d7559SDave Watson int rc = 0; 7683c4d7559SDave Watson 769dd0bed16SAtul Gupta if (tls_hw_prot(sk)) 770dd0bed16SAtul Gupta goto out; 771dd0bed16SAtul Gupta 772d91c3e17SIlya Lesokhin /* The TLS ulp is currently supported only for TCP sockets 773d91c3e17SIlya Lesokhin * in ESTABLISHED state. 774d91c3e17SIlya Lesokhin * Supporting sockets in LISTEN state will require us 775d91c3e17SIlya Lesokhin * to modify the accept implementation to clone rather then 776d91c3e17SIlya Lesokhin * share the ulp context. 777d91c3e17SIlya Lesokhin */ 778d91c3e17SIlya Lesokhin if (sk->sk_state != TCP_ESTABLISHED) 779d91c3e17SIlya Lesokhin return -ENOTSUPP; 780d91c3e17SIlya Lesokhin 7813c4d7559SDave Watson /* allocate tls context */ 782dd0bed16SAtul Gupta ctx = create_ctx(sk); 7833c4d7559SDave Watson if (!ctx) { 7843c4d7559SDave Watson rc = -ENOMEM; 7853c4d7559SDave Watson goto out; 7863c4d7559SDave Watson } 7876d88207fSIlya Lesokhin 78863a6b3feSAtul Gupta tls_build_proto(sk); 789f66de3eeSBoris Pismenny ctx->tx_conf = TLS_BASE; 790f66de3eeSBoris Pismenny ctx->rx_conf = TLS_BASE; 7916d88207fSIlya Lesokhin update_sk_prot(sk, ctx); 7923c4d7559SDave Watson out: 7933c4d7559SDave Watson return rc; 7943c4d7559SDave Watson } 7953c4d7559SDave Watson 796dd0bed16SAtul Gupta void tls_register_device(struct tls_device *device) 797dd0bed16SAtul Gupta { 798df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 799dd0bed16SAtul Gupta list_add_tail(&device->dev_list, &device_list); 800df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 801dd0bed16SAtul Gupta } 802dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_register_device); 803dd0bed16SAtul Gupta 804dd0bed16SAtul Gupta void tls_unregister_device(struct tls_device *device) 805dd0bed16SAtul Gupta { 806df9d4a17SAtul Gupta spin_lock_bh(&device_spinlock); 807dd0bed16SAtul Gupta list_del(&device->dev_list); 808df9d4a17SAtul Gupta spin_unlock_bh(&device_spinlock); 809dd0bed16SAtul Gupta } 810dd0bed16SAtul Gupta EXPORT_SYMBOL(tls_unregister_device); 811dd0bed16SAtul Gupta 8123c4d7559SDave Watson static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = { 8133c4d7559SDave Watson .name = "tls", 8143c4d7559SDave Watson .owner = THIS_MODULE, 8153c4d7559SDave Watson .init = tls_init, 8163c4d7559SDave Watson }; 8173c4d7559SDave Watson 8183c4d7559SDave Watson static int __init tls_register(void) 8193c4d7559SDave Watson { 820c46234ebSDave Watson tls_sw_proto_ops = inet_stream_ops; 821c46234ebSDave Watson tls_sw_proto_ops.splice_read = tls_sw_splice_read; 822c46234ebSDave Watson 823e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 824e8f69799SIlya Lesokhin tls_device_init(); 825e8f69799SIlya Lesokhin #endif 8263c4d7559SDave Watson tcp_register_ulp(&tcp_tls_ulp_ops); 8273c4d7559SDave Watson 8283c4d7559SDave Watson return 0; 8293c4d7559SDave Watson } 8303c4d7559SDave Watson 8313c4d7559SDave Watson static void __exit tls_unregister(void) 8323c4d7559SDave Watson { 8333c4d7559SDave Watson tcp_unregister_ulp(&tcp_tls_ulp_ops); 834e8f69799SIlya Lesokhin #ifdef CONFIG_TLS_DEVICE 835e8f69799SIlya Lesokhin tls_device_cleanup(); 836e8f69799SIlya Lesokhin #endif 8373c4d7559SDave Watson } 8383c4d7559SDave Watson 8393c4d7559SDave Watson module_init(tls_register); 8403c4d7559SDave Watson module_exit(tls_unregister); 841