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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /net/tls/tls_main.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/tls/tls_main.c')
-rw-r--r--net/tls/tls_main.c1246
1 files changed, 1246 insertions, 0 deletions
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
new file mode 100644
index 000000000..338a443fa
--- /dev/null
+++ b/net/tls/tls_main.c
@@ -0,0 +1,1246 @@
+/*
+ * Copyright (c) 2016-2017, Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016-2017, Dave Watson <davejwatson@fb.com>. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+
+#include <net/tcp.h>
+#include <net/inet_common.h>
+#include <linux/highmem.h>
+#include <linux/netdevice.h>
+#include <linux/sched/signal.h>
+#include <linux/inetdevice.h>
+#include <linux/inet_diag.h>
+
+#include <net/snmp.h>
+#include <net/tls.h>
+#include <net/tls_toe.h>
+
+#include "tls.h"
+
+MODULE_AUTHOR("Mellanox Technologies");
+MODULE_DESCRIPTION("Transport Layer Security Support");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS_TCP_ULP("tls");
+
+enum {
+ TLSV4,
+ TLSV6,
+ TLS_NUM_PROTS,
+};
+
+#define CIPHER_SIZE_DESC(cipher) [cipher] = { \
+ .iv = cipher ## _IV_SIZE, \
+ .key = cipher ## _KEY_SIZE, \
+ .salt = cipher ## _SALT_SIZE, \
+ .tag = cipher ## _TAG_SIZE, \
+ .rec_seq = cipher ## _REC_SEQ_SIZE, \
+}
+
+const struct tls_cipher_size_desc tls_cipher_size_desc[] = {
+ CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_128),
+ CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_256),
+ CIPHER_SIZE_DESC(TLS_CIPHER_AES_CCM_128),
+ CIPHER_SIZE_DESC(TLS_CIPHER_CHACHA20_POLY1305),
+ CIPHER_SIZE_DESC(TLS_CIPHER_SM4_GCM),
+ CIPHER_SIZE_DESC(TLS_CIPHER_SM4_CCM),
+};
+
+static const struct proto *saved_tcpv6_prot;
+static DEFINE_MUTEX(tcpv6_prot_mutex);
+static const struct proto *saved_tcpv4_prot;
+static DEFINE_MUTEX(tcpv4_prot_mutex);
+static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
+static struct proto_ops tls_proto_ops[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
+static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
+ const struct proto *base);
+
+void update_sk_prot(struct sock *sk, struct tls_context *ctx)
+{
+ int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
+
+ WRITE_ONCE(sk->sk_prot,
+ &tls_prots[ip_ver][ctx->tx_conf][ctx->rx_conf]);
+ WRITE_ONCE(sk->sk_socket->ops,
+ &tls_proto_ops[ip_ver][ctx->tx_conf][ctx->rx_conf]);
+}
+
+int wait_on_pending_writer(struct sock *sk, long *timeo)
+{
+ DEFINE_WAIT_FUNC(wait, woken_wake_function);
+ int ret, rc = 0;
+
+ add_wait_queue(sk_sleep(sk), &wait);
+ while (1) {
+ if (!*timeo) {
+ rc = -EAGAIN;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ rc = sock_intr_errno(*timeo);
+ break;
+ }
+
+ ret = sk_wait_event(sk, timeo,
+ !READ_ONCE(sk->sk_write_pending), &wait);
+ if (ret) {
+ if (ret < 0)
+ rc = ret;
+ break;
+ }
+ }
+ remove_wait_queue(sk_sleep(sk), &wait);
+ return rc;
+}
+
+int tls_push_sg(struct sock *sk,
+ struct tls_context *ctx,
+ struct scatterlist *sg,
+ u16 first_offset,
+ int flags)
+{
+ int sendpage_flags = flags | MSG_SENDPAGE_NOTLAST;
+ int ret = 0;
+ struct page *p;
+ size_t size;
+ int offset = first_offset;
+
+ size = sg->length - offset;
+ offset += sg->offset;
+
+ ctx->in_tcp_sendpages = true;
+ while (1) {
+ if (sg_is_last(sg))
+ sendpage_flags = flags;
+
+ /* is sending application-limited? */
+ tcp_rate_check_app_limited(sk);
+ p = sg_page(sg);
+retry:
+ ret = do_tcp_sendpages(sk, p, offset, size, sendpage_flags);
+
+ if (ret != size) {
+ if (ret > 0) {
+ offset += ret;
+ size -= ret;
+ goto retry;
+ }
+
+ offset -= sg->offset;
+ ctx->partially_sent_offset = offset;
+ ctx->partially_sent_record = (void *)sg;
+ ctx->in_tcp_sendpages = false;
+ return ret;
+ }
+
+ put_page(p);
+ sk_mem_uncharge(sk, sg->length);
+ sg = sg_next(sg);
+ if (!sg)
+ break;
+
+ offset = sg->offset;
+ size = sg->length;
+ }
+
+ ctx->in_tcp_sendpages = false;
+
+ return 0;
+}
+
+static int tls_handle_open_record(struct sock *sk, int flags)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+
+ if (tls_is_pending_open_record(ctx))
+ return ctx->push_pending_record(sk, flags);
+
+ return 0;
+}
+
+int tls_process_cmsg(struct sock *sk, struct msghdr *msg,
+ unsigned char *record_type)
+{
+ struct cmsghdr *cmsg;
+ int rc = -EINVAL;
+
+ for_each_cmsghdr(cmsg, msg) {
+ if (!CMSG_OK(msg, cmsg))
+ return -EINVAL;
+ if (cmsg->cmsg_level != SOL_TLS)
+ continue;
+
+ switch (cmsg->cmsg_type) {
+ case TLS_SET_RECORD_TYPE:
+ if (cmsg->cmsg_len < CMSG_LEN(sizeof(*record_type)))
+ return -EINVAL;
+
+ if (msg->msg_flags & MSG_MORE)
+ return -EINVAL;
+
+ rc = tls_handle_open_record(sk, msg->msg_flags);
+ if (rc)
+ return rc;
+
+ *record_type = *(unsigned char *)CMSG_DATA(cmsg);
+ rc = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return rc;
+}
+
+int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
+ int flags)
+{
+ struct scatterlist *sg;
+ u16 offset;
+
+ sg = ctx->partially_sent_record;
+ offset = ctx->partially_sent_offset;
+
+ ctx->partially_sent_record = NULL;
+ return tls_push_sg(sk, ctx, sg, offset, flags);
+}
+
+void tls_free_partial_record(struct sock *sk, struct tls_context *ctx)
+{
+ struct scatterlist *sg;
+
+ for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) {
+ put_page(sg_page(sg));
+ sk_mem_uncharge(sk, sg->length);
+ }
+ ctx->partially_sent_record = NULL;
+}
+
+static void tls_write_space(struct sock *sk)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+
+ /* If in_tcp_sendpages call lower protocol write space handler
+ * to ensure we wake up any waiting operations there. For example
+ * if do_tcp_sendpages where to call sk_wait_event.
+ */
+ if (ctx->in_tcp_sendpages) {
+ ctx->sk_write_space(sk);
+ return;
+ }
+
+#ifdef CONFIG_TLS_DEVICE
+ if (ctx->tx_conf == TLS_HW)
+ tls_device_write_space(sk, ctx);
+ else
+#endif
+ tls_sw_write_space(sk, ctx);
+
+ ctx->sk_write_space(sk);
+}
+
+/**
+ * tls_ctx_free() - free TLS ULP context
+ * @sk: socket to with @ctx is attached
+ * @ctx: TLS context structure
+ *
+ * Free TLS context. If @sk is %NULL caller guarantees that the socket
+ * to which @ctx was attached has no outstanding references.
+ */
+void tls_ctx_free(struct sock *sk, struct tls_context *ctx)
+{
+ if (!ctx)
+ return;
+
+ memzero_explicit(&ctx->crypto_send, sizeof(ctx->crypto_send));
+ memzero_explicit(&ctx->crypto_recv, sizeof(ctx->crypto_recv));
+ mutex_destroy(&ctx->tx_lock);
+
+ if (sk)
+ kfree_rcu(ctx, rcu);
+ else
+ kfree(ctx);
+}
+
+static void tls_sk_proto_cleanup(struct sock *sk,
+ struct tls_context *ctx, long timeo)
+{
+ if (unlikely(sk->sk_write_pending) &&
+ !wait_on_pending_writer(sk, &timeo))
+ tls_handle_open_record(sk, 0);
+
+ /* We need these for tls_sw_fallback handling of other packets */
+ if (ctx->tx_conf == TLS_SW) {
+ kfree(ctx->tx.rec_seq);
+ kfree(ctx->tx.iv);
+ tls_sw_release_resources_tx(sk);
+ TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
+ } else if (ctx->tx_conf == TLS_HW) {
+ tls_device_free_resources_tx(sk);
+ TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
+ }
+
+ if (ctx->rx_conf == TLS_SW) {
+ tls_sw_release_resources_rx(sk);
+ TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
+ } else if (ctx->rx_conf == TLS_HW) {
+ tls_device_offload_cleanup_rx(sk);
+ TLS_DEC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
+ }
+}
+
+static void tls_sk_proto_close(struct sock *sk, long timeout)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct tls_context *ctx = tls_get_ctx(sk);
+ long timeo = sock_sndtimeo(sk, 0);
+ bool free_ctx;
+
+ if (ctx->tx_conf == TLS_SW)
+ tls_sw_cancel_work_tx(ctx);
+
+ lock_sock(sk);
+ free_ctx = ctx->tx_conf != TLS_HW && ctx->rx_conf != TLS_HW;
+
+ if (ctx->tx_conf != TLS_BASE || ctx->rx_conf != TLS_BASE)
+ tls_sk_proto_cleanup(sk, ctx, timeo);
+
+ write_lock_bh(&sk->sk_callback_lock);
+ if (free_ctx)
+ rcu_assign_pointer(icsk->icsk_ulp_data, NULL);
+ WRITE_ONCE(sk->sk_prot, ctx->sk_proto);
+ if (sk->sk_write_space == tls_write_space)
+ sk->sk_write_space = ctx->sk_write_space;
+ write_unlock_bh(&sk->sk_callback_lock);
+ release_sock(sk);
+ if (ctx->tx_conf == TLS_SW)
+ tls_sw_free_ctx_tx(ctx);
+ if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
+ tls_sw_strparser_done(ctx);
+ if (ctx->rx_conf == TLS_SW)
+ tls_sw_free_ctx_rx(ctx);
+ ctx->sk_proto->close(sk, timeout);
+
+ if (free_ctx)
+ tls_ctx_free(sk, ctx);
+}
+
+static int do_tls_getsockopt_conf(struct sock *sk, char __user *optval,
+ int __user *optlen, int tx)
+{
+ int rc = 0;
+ struct tls_context *ctx = tls_get_ctx(sk);
+ struct tls_crypto_info *crypto_info;
+ struct cipher_context *cctx;
+ int len;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ if (!optval || (len < sizeof(*crypto_info))) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (!ctx) {
+ rc = -EBUSY;
+ goto out;
+ }
+
+ /* get user crypto info */
+ if (tx) {
+ crypto_info = &ctx->crypto_send.info;
+ cctx = &ctx->tx;
+ } else {
+ crypto_info = &ctx->crypto_recv.info;
+ cctx = &ctx->rx;
+ }
+
+ if (!TLS_CRYPTO_INFO_READY(crypto_info)) {
+ rc = -EBUSY;
+ goto out;
+ }
+
+ if (len == sizeof(*crypto_info)) {
+ if (copy_to_user(optval, crypto_info, sizeof(*crypto_info)))
+ rc = -EFAULT;
+ goto out;
+ }
+
+ switch (crypto_info->cipher_type) {
+ case TLS_CIPHER_AES_GCM_128: {
+ struct tls12_crypto_info_aes_gcm_128 *
+ crypto_info_aes_gcm_128 =
+ container_of(crypto_info,
+ struct tls12_crypto_info_aes_gcm_128,
+ info);
+
+ if (len != sizeof(*crypto_info_aes_gcm_128)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(crypto_info_aes_gcm_128->iv,
+ cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
+ TLS_CIPHER_AES_GCM_128_IV_SIZE);
+ memcpy(crypto_info_aes_gcm_128->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);
+ if (copy_to_user(optval,
+ crypto_info_aes_gcm_128,
+ sizeof(*crypto_info_aes_gcm_128)))
+ rc = -EFAULT;
+ break;
+ }
+ case TLS_CIPHER_AES_GCM_256: {
+ struct tls12_crypto_info_aes_gcm_256 *
+ crypto_info_aes_gcm_256 =
+ container_of(crypto_info,
+ struct tls12_crypto_info_aes_gcm_256,
+ info);
+
+ if (len != sizeof(*crypto_info_aes_gcm_256)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(crypto_info_aes_gcm_256->iv,
+ cctx->iv + TLS_CIPHER_AES_GCM_256_SALT_SIZE,
+ TLS_CIPHER_AES_GCM_256_IV_SIZE);
+ memcpy(crypto_info_aes_gcm_256->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE);
+ if (copy_to_user(optval,
+ crypto_info_aes_gcm_256,
+ sizeof(*crypto_info_aes_gcm_256)))
+ rc = -EFAULT;
+ break;
+ }
+ case TLS_CIPHER_AES_CCM_128: {
+ struct tls12_crypto_info_aes_ccm_128 *aes_ccm_128 =
+ container_of(crypto_info,
+ struct tls12_crypto_info_aes_ccm_128, info);
+
+ if (len != sizeof(*aes_ccm_128)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(aes_ccm_128->iv,
+ cctx->iv + TLS_CIPHER_AES_CCM_128_SALT_SIZE,
+ TLS_CIPHER_AES_CCM_128_IV_SIZE);
+ memcpy(aes_ccm_128->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE);
+ if (copy_to_user(optval, aes_ccm_128, sizeof(*aes_ccm_128)))
+ rc = -EFAULT;
+ break;
+ }
+ case TLS_CIPHER_CHACHA20_POLY1305: {
+ struct tls12_crypto_info_chacha20_poly1305 *chacha20_poly1305 =
+ container_of(crypto_info,
+ struct tls12_crypto_info_chacha20_poly1305,
+ info);
+
+ if (len != sizeof(*chacha20_poly1305)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(chacha20_poly1305->iv,
+ cctx->iv + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE,
+ TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE);
+ memcpy(chacha20_poly1305->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE);
+ if (copy_to_user(optval, chacha20_poly1305,
+ sizeof(*chacha20_poly1305)))
+ rc = -EFAULT;
+ break;
+ }
+ case TLS_CIPHER_SM4_GCM: {
+ struct tls12_crypto_info_sm4_gcm *sm4_gcm_info =
+ container_of(crypto_info,
+ struct tls12_crypto_info_sm4_gcm, info);
+
+ if (len != sizeof(*sm4_gcm_info)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(sm4_gcm_info->iv,
+ cctx->iv + TLS_CIPHER_SM4_GCM_SALT_SIZE,
+ TLS_CIPHER_SM4_GCM_IV_SIZE);
+ memcpy(sm4_gcm_info->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE);
+ if (copy_to_user(optval, sm4_gcm_info, sizeof(*sm4_gcm_info)))
+ rc = -EFAULT;
+ break;
+ }
+ case TLS_CIPHER_SM4_CCM: {
+ struct tls12_crypto_info_sm4_ccm *sm4_ccm_info =
+ container_of(crypto_info,
+ struct tls12_crypto_info_sm4_ccm, info);
+
+ if (len != sizeof(*sm4_ccm_info)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(sm4_ccm_info->iv,
+ cctx->iv + TLS_CIPHER_SM4_CCM_SALT_SIZE,
+ TLS_CIPHER_SM4_CCM_IV_SIZE);
+ memcpy(sm4_ccm_info->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE);
+ if (copy_to_user(optval, sm4_ccm_info, sizeof(*sm4_ccm_info)))
+ rc = -EFAULT;
+ break;
+ }
+ case TLS_CIPHER_ARIA_GCM_128: {
+ struct tls12_crypto_info_aria_gcm_128 *
+ crypto_info_aria_gcm_128 =
+ container_of(crypto_info,
+ struct tls12_crypto_info_aria_gcm_128,
+ info);
+
+ if (len != sizeof(*crypto_info_aria_gcm_128)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(crypto_info_aria_gcm_128->iv,
+ cctx->iv + TLS_CIPHER_ARIA_GCM_128_SALT_SIZE,
+ TLS_CIPHER_ARIA_GCM_128_IV_SIZE);
+ memcpy(crypto_info_aria_gcm_128->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_ARIA_GCM_128_REC_SEQ_SIZE);
+ if (copy_to_user(optval,
+ crypto_info_aria_gcm_128,
+ sizeof(*crypto_info_aria_gcm_128)))
+ rc = -EFAULT;
+ break;
+ }
+ case TLS_CIPHER_ARIA_GCM_256: {
+ struct tls12_crypto_info_aria_gcm_256 *
+ crypto_info_aria_gcm_256 =
+ container_of(crypto_info,
+ struct tls12_crypto_info_aria_gcm_256,
+ info);
+
+ if (len != sizeof(*crypto_info_aria_gcm_256)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(crypto_info_aria_gcm_256->iv,
+ cctx->iv + TLS_CIPHER_ARIA_GCM_256_SALT_SIZE,
+ TLS_CIPHER_ARIA_GCM_256_IV_SIZE);
+ memcpy(crypto_info_aria_gcm_256->rec_seq, cctx->rec_seq,
+ TLS_CIPHER_ARIA_GCM_256_REC_SEQ_SIZE);
+ if (copy_to_user(optval,
+ crypto_info_aria_gcm_256,
+ sizeof(*crypto_info_aria_gcm_256)))
+ rc = -EFAULT;
+ break;
+ }
+ default:
+ rc = -EINVAL;
+ }
+
+out:
+ return rc;
+}
+
+static int do_tls_getsockopt_tx_zc(struct sock *sk, char __user *optval,
+ int __user *optlen)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+ unsigned int value;
+ int len;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ if (len != sizeof(value))
+ return -EINVAL;
+
+ value = ctx->zerocopy_sendfile;
+ if (copy_to_user(optval, &value, sizeof(value)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int do_tls_getsockopt_no_pad(struct sock *sk, char __user *optval,
+ int __user *optlen)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+ int value, len;
+
+ if (ctx->prot_info.version != TLS_1_3_VERSION)
+ return -EINVAL;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+ if (len < sizeof(value))
+ return -EINVAL;
+
+ value = -EINVAL;
+ if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW)
+ value = ctx->rx_no_pad;
+ if (value < 0)
+ return value;
+
+ if (put_user(sizeof(value), optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &value, sizeof(value)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int do_tls_getsockopt(struct sock *sk, int optname,
+ char __user *optval, int __user *optlen)
+{
+ int rc = 0;
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case TLS_TX:
+ case TLS_RX:
+ rc = do_tls_getsockopt_conf(sk, optval, optlen,
+ optname == TLS_TX);
+ break;
+ case TLS_TX_ZEROCOPY_RO:
+ rc = do_tls_getsockopt_tx_zc(sk, optval, optlen);
+ break;
+ case TLS_RX_EXPECT_NO_PAD:
+ rc = do_tls_getsockopt_no_pad(sk, optval, optlen);
+ break;
+ default:
+ rc = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+
+ return rc;
+}
+
+static int tls_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+
+ if (level != SOL_TLS)
+ return ctx->sk_proto->getsockopt(sk, level,
+ optname, optval, optlen);
+
+ return do_tls_getsockopt(sk, optname, optval, optlen);
+}
+
+static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
+ unsigned int optlen, int tx)
+{
+ struct tls_crypto_info *crypto_info;
+ struct tls_crypto_info *alt_crypto_info;
+ struct tls_context *ctx = tls_get_ctx(sk);
+ size_t optsize;
+ int rc = 0;
+ int conf;
+
+ if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info)))
+ return -EINVAL;
+
+ if (tx) {
+ crypto_info = &ctx->crypto_send.info;
+ alt_crypto_info = &ctx->crypto_recv.info;
+ } else {
+ crypto_info = &ctx->crypto_recv.info;
+ alt_crypto_info = &ctx->crypto_send.info;
+ }
+
+ /* Currently we don't support set crypto info more than one time */
+ if (TLS_CRYPTO_INFO_READY(crypto_info))
+ return -EBUSY;
+
+ rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info));
+ if (rc) {
+ rc = -EFAULT;
+ goto err_crypto_info;
+ }
+
+ /* check version */
+ if (crypto_info->version != TLS_1_2_VERSION &&
+ crypto_info->version != TLS_1_3_VERSION) {
+ rc = -EINVAL;
+ goto err_crypto_info;
+ }
+
+ /* Ensure that TLS version and ciphers are same in both directions */
+ if (TLS_CRYPTO_INFO_READY(alt_crypto_info)) {
+ if (alt_crypto_info->version != crypto_info->version ||
+ alt_crypto_info->cipher_type != crypto_info->cipher_type) {
+ rc = -EINVAL;
+ goto err_crypto_info;
+ }
+ }
+
+ switch (crypto_info->cipher_type) {
+ case TLS_CIPHER_AES_GCM_128:
+ optsize = sizeof(struct tls12_crypto_info_aes_gcm_128);
+ break;
+ case TLS_CIPHER_AES_GCM_256: {
+ optsize = sizeof(struct tls12_crypto_info_aes_gcm_256);
+ break;
+ }
+ case TLS_CIPHER_AES_CCM_128:
+ optsize = sizeof(struct tls12_crypto_info_aes_ccm_128);
+ break;
+ case TLS_CIPHER_CHACHA20_POLY1305:
+ optsize = sizeof(struct tls12_crypto_info_chacha20_poly1305);
+ break;
+ case TLS_CIPHER_SM4_GCM:
+ optsize = sizeof(struct tls12_crypto_info_sm4_gcm);
+ break;
+ case TLS_CIPHER_SM4_CCM:
+ optsize = sizeof(struct tls12_crypto_info_sm4_ccm);
+ break;
+ case TLS_CIPHER_ARIA_GCM_128:
+ if (crypto_info->version != TLS_1_2_VERSION) {
+ rc = -EINVAL;
+ goto err_crypto_info;
+ }
+ optsize = sizeof(struct tls12_crypto_info_aria_gcm_128);
+ break;
+ case TLS_CIPHER_ARIA_GCM_256:
+ if (crypto_info->version != TLS_1_2_VERSION) {
+ rc = -EINVAL;
+ goto err_crypto_info;
+ }
+ optsize = sizeof(struct tls12_crypto_info_aria_gcm_256);
+ break;
+ default:
+ rc = -EINVAL;
+ goto err_crypto_info;
+ }
+
+ if (optlen != optsize) {
+ rc = -EINVAL;
+ goto err_crypto_info;
+ }
+
+ rc = copy_from_sockptr_offset(crypto_info + 1, optval,
+ sizeof(*crypto_info),
+ optlen - sizeof(*crypto_info));
+ if (rc) {
+ rc = -EFAULT;
+ goto err_crypto_info;
+ }
+
+ if (tx) {
+ rc = tls_set_device_offload(sk, ctx);
+ conf = TLS_HW;
+ if (!rc) {
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXDEVICE);
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXDEVICE);
+ } else {
+ rc = tls_set_sw_offload(sk, ctx, 1);
+ if (rc)
+ goto err_crypto_info;
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSTXSW);
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRTXSW);
+ conf = TLS_SW;
+ }
+ } else {
+ rc = tls_set_device_offload_rx(sk, ctx);
+ conf = TLS_HW;
+ if (!rc) {
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXDEVICE);
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXDEVICE);
+ } else {
+ rc = tls_set_sw_offload(sk, ctx, 0);
+ if (rc)
+ goto err_crypto_info;
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSRXSW);
+ TLS_INC_STATS(sock_net(sk), LINUX_MIB_TLSCURRRXSW);
+ conf = TLS_SW;
+ }
+ tls_sw_strparser_arm(sk, ctx);
+ }
+
+ if (tx)
+ ctx->tx_conf = conf;
+ else
+ ctx->rx_conf = conf;
+ update_sk_prot(sk, ctx);
+ if (tx) {
+ ctx->sk_write_space = sk->sk_write_space;
+ sk->sk_write_space = tls_write_space;
+ } else {
+ struct tls_sw_context_rx *rx_ctx = tls_sw_ctx_rx(ctx);
+
+ tls_strp_check_rcv(&rx_ctx->strp);
+ }
+ return 0;
+
+err_crypto_info:
+ memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
+ return rc;
+}
+
+static int do_tls_setsockopt_tx_zc(struct sock *sk, sockptr_t optval,
+ unsigned int optlen)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+ unsigned int value;
+
+ if (sockptr_is_null(optval) || optlen != sizeof(value))
+ return -EINVAL;
+
+ if (copy_from_sockptr(&value, optval, sizeof(value)))
+ return -EFAULT;
+
+ if (value > 1)
+ return -EINVAL;
+
+ ctx->zerocopy_sendfile = value;
+
+ return 0;
+}
+
+static int do_tls_setsockopt_no_pad(struct sock *sk, sockptr_t optval,
+ unsigned int optlen)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+ u32 val;
+ int rc;
+
+ if (ctx->prot_info.version != TLS_1_3_VERSION ||
+ sockptr_is_null(optval) || optlen < sizeof(val))
+ return -EINVAL;
+
+ rc = copy_from_sockptr(&val, optval, sizeof(val));
+ if (rc)
+ return -EFAULT;
+ if (val > 1)
+ return -EINVAL;
+ rc = check_zeroed_sockptr(optval, sizeof(val), optlen - sizeof(val));
+ if (rc < 1)
+ return rc == 0 ? -EINVAL : rc;
+
+ lock_sock(sk);
+ rc = -EINVAL;
+ if (ctx->rx_conf == TLS_SW || ctx->rx_conf == TLS_HW) {
+ ctx->rx_no_pad = val;
+ tls_update_rx_zc_capable(ctx);
+ rc = 0;
+ }
+ release_sock(sk);
+
+ return rc;
+}
+
+static int do_tls_setsockopt(struct sock *sk, int optname, sockptr_t optval,
+ unsigned int optlen)
+{
+ int rc = 0;
+
+ switch (optname) {
+ case TLS_TX:
+ case TLS_RX:
+ lock_sock(sk);
+ rc = do_tls_setsockopt_conf(sk, optval, optlen,
+ optname == TLS_TX);
+ release_sock(sk);
+ break;
+ case TLS_TX_ZEROCOPY_RO:
+ lock_sock(sk);
+ rc = do_tls_setsockopt_tx_zc(sk, optval, optlen);
+ release_sock(sk);
+ break;
+ case TLS_RX_EXPECT_NO_PAD:
+ rc = do_tls_setsockopt_no_pad(sk, optval, optlen);
+ break;
+ default:
+ rc = -ENOPROTOOPT;
+ break;
+ }
+ return rc;
+}
+
+static int tls_setsockopt(struct sock *sk, int level, int optname,
+ sockptr_t optval, unsigned int optlen)
+{
+ struct tls_context *ctx = tls_get_ctx(sk);
+
+ if (level != SOL_TLS)
+ return ctx->sk_proto->setsockopt(sk, level, optname, optval,
+ optlen);
+
+ return do_tls_setsockopt(sk, optname, optval, optlen);
+}
+
+struct tls_context *tls_ctx_create(struct sock *sk)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct tls_context *ctx;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
+ if (!ctx)
+ return NULL;
+
+ mutex_init(&ctx->tx_lock);
+ rcu_assign_pointer(icsk->icsk_ulp_data, ctx);
+ ctx->sk_proto = READ_ONCE(sk->sk_prot);
+ ctx->sk = sk;
+ return ctx;
+}
+
+static void build_proto_ops(struct proto_ops ops[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
+ const struct proto_ops *base)
+{
+ ops[TLS_BASE][TLS_BASE] = *base;
+
+ ops[TLS_SW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
+ ops[TLS_SW ][TLS_BASE].sendpage_locked = tls_sw_sendpage_locked;
+
+ ops[TLS_BASE][TLS_SW ] = ops[TLS_BASE][TLS_BASE];
+ ops[TLS_BASE][TLS_SW ].splice_read = tls_sw_splice_read;
+
+ ops[TLS_SW ][TLS_SW ] = ops[TLS_SW ][TLS_BASE];
+ ops[TLS_SW ][TLS_SW ].splice_read = tls_sw_splice_read;
+
+#ifdef CONFIG_TLS_DEVICE
+ ops[TLS_HW ][TLS_BASE] = ops[TLS_BASE][TLS_BASE];
+ ops[TLS_HW ][TLS_BASE].sendpage_locked = NULL;
+
+ ops[TLS_HW ][TLS_SW ] = ops[TLS_BASE][TLS_SW ];
+ ops[TLS_HW ][TLS_SW ].sendpage_locked = NULL;
+
+ ops[TLS_BASE][TLS_HW ] = ops[TLS_BASE][TLS_SW ];
+
+ ops[TLS_SW ][TLS_HW ] = ops[TLS_SW ][TLS_SW ];
+
+ ops[TLS_HW ][TLS_HW ] = ops[TLS_HW ][TLS_SW ];
+ ops[TLS_HW ][TLS_HW ].sendpage_locked = NULL;
+#endif
+#ifdef CONFIG_TLS_TOE
+ ops[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
+#endif
+}
+
+static void tls_build_proto(struct sock *sk)
+{
+ int ip_ver = sk->sk_family == AF_INET6 ? TLSV6 : TLSV4;
+ struct proto *prot = READ_ONCE(sk->sk_prot);
+
+ /* Build IPv6 TLS whenever the address of tcpv6 _prot changes */
+ if (ip_ver == TLSV6 &&
+ unlikely(prot != smp_load_acquire(&saved_tcpv6_prot))) {
+ mutex_lock(&tcpv6_prot_mutex);
+ if (likely(prot != saved_tcpv6_prot)) {
+ build_protos(tls_prots[TLSV6], prot);
+ build_proto_ops(tls_proto_ops[TLSV6],
+ sk->sk_socket->ops);
+ smp_store_release(&saved_tcpv6_prot, prot);
+ }
+ mutex_unlock(&tcpv6_prot_mutex);
+ }
+
+ if (ip_ver == TLSV4 &&
+ unlikely(prot != smp_load_acquire(&saved_tcpv4_prot))) {
+ mutex_lock(&tcpv4_prot_mutex);
+ if (likely(prot != saved_tcpv4_prot)) {
+ build_protos(tls_prots[TLSV4], prot);
+ build_proto_ops(tls_proto_ops[TLSV4],
+ sk->sk_socket->ops);
+ smp_store_release(&saved_tcpv4_prot, prot);
+ }
+ mutex_unlock(&tcpv4_prot_mutex);
+ }
+}
+
+static void build_protos(struct proto prot[TLS_NUM_CONFIG][TLS_NUM_CONFIG],
+ const struct proto *base)
+{
+ prot[TLS_BASE][TLS_BASE] = *base;
+ prot[TLS_BASE][TLS_BASE].setsockopt = tls_setsockopt;
+ prot[TLS_BASE][TLS_BASE].getsockopt = tls_getsockopt;
+ prot[TLS_BASE][TLS_BASE].close = tls_sk_proto_close;
+
+ prot[TLS_SW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
+ prot[TLS_SW][TLS_BASE].sendmsg = tls_sw_sendmsg;
+ prot[TLS_SW][TLS_BASE].sendpage = tls_sw_sendpage;
+
+ prot[TLS_BASE][TLS_SW] = prot[TLS_BASE][TLS_BASE];
+ prot[TLS_BASE][TLS_SW].recvmsg = tls_sw_recvmsg;
+ prot[TLS_BASE][TLS_SW].sock_is_readable = tls_sw_sock_is_readable;
+ prot[TLS_BASE][TLS_SW].close = tls_sk_proto_close;
+
+ prot[TLS_SW][TLS_SW] = prot[TLS_SW][TLS_BASE];
+ prot[TLS_SW][TLS_SW].recvmsg = tls_sw_recvmsg;
+ prot[TLS_SW][TLS_SW].sock_is_readable = tls_sw_sock_is_readable;
+ prot[TLS_SW][TLS_SW].close = tls_sk_proto_close;
+
+#ifdef CONFIG_TLS_DEVICE
+ prot[TLS_HW][TLS_BASE] = prot[TLS_BASE][TLS_BASE];
+ prot[TLS_HW][TLS_BASE].sendmsg = tls_device_sendmsg;
+ prot[TLS_HW][TLS_BASE].sendpage = tls_device_sendpage;
+
+ prot[TLS_HW][TLS_SW] = prot[TLS_BASE][TLS_SW];
+ prot[TLS_HW][TLS_SW].sendmsg = tls_device_sendmsg;
+ prot[TLS_HW][TLS_SW].sendpage = tls_device_sendpage;
+
+ prot[TLS_BASE][TLS_HW] = prot[TLS_BASE][TLS_SW];
+
+ prot[TLS_SW][TLS_HW] = prot[TLS_SW][TLS_SW];
+
+ prot[TLS_HW][TLS_HW] = prot[TLS_HW][TLS_SW];
+#endif
+#ifdef CONFIG_TLS_TOE
+ prot[TLS_HW_RECORD][TLS_HW_RECORD] = *base;
+ prot[TLS_HW_RECORD][TLS_HW_RECORD].hash = tls_toe_hash;
+ prot[TLS_HW_RECORD][TLS_HW_RECORD].unhash = tls_toe_unhash;
+#endif
+}
+
+static int tls_init(struct sock *sk)
+{
+ struct tls_context *ctx;
+ int rc = 0;
+
+ tls_build_proto(sk);
+
+#ifdef CONFIG_TLS_TOE
+ if (tls_toe_bypass(sk))
+ return 0;
+#endif
+
+ /* The TLS ulp is currently supported only for TCP sockets
+ * in ESTABLISHED state.
+ * Supporting sockets in LISTEN state will require us
+ * to modify the accept implementation to clone rather then
+ * share the ulp context.
+ */
+ if (sk->sk_state != TCP_ESTABLISHED)
+ return -ENOTCONN;
+
+ /* allocate tls context */
+ write_lock_bh(&sk->sk_callback_lock);
+ ctx = tls_ctx_create(sk);
+ if (!ctx) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ ctx->tx_conf = TLS_BASE;
+ ctx->rx_conf = TLS_BASE;
+ update_sk_prot(sk, ctx);
+out:
+ write_unlock_bh(&sk->sk_callback_lock);
+ return rc;
+}
+
+static void tls_update(struct sock *sk, struct proto *p,
+ void (*write_space)(struct sock *sk))
+{
+ struct tls_context *ctx;
+
+ WARN_ON_ONCE(sk->sk_prot == p);
+
+ ctx = tls_get_ctx(sk);
+ if (likely(ctx)) {
+ ctx->sk_write_space = write_space;
+ ctx->sk_proto = p;
+ } else {
+ /* Pairs with lockless read in sk_clone_lock(). */
+ WRITE_ONCE(sk->sk_prot, p);
+ sk->sk_write_space = write_space;
+ }
+}
+
+static u16 tls_user_config(struct tls_context *ctx, bool tx)
+{
+ u16 config = tx ? ctx->tx_conf : ctx->rx_conf;
+
+ switch (config) {
+ case TLS_BASE:
+ return TLS_CONF_BASE;
+ case TLS_SW:
+ return TLS_CONF_SW;
+ case TLS_HW:
+ return TLS_CONF_HW;
+ case TLS_HW_RECORD:
+ return TLS_CONF_HW_RECORD;
+ }
+ return 0;
+}
+
+static int tls_get_info(const struct sock *sk, struct sk_buff *skb)
+{
+ u16 version, cipher_type;
+ struct tls_context *ctx;
+ struct nlattr *start;
+ int err;
+
+ start = nla_nest_start_noflag(skb, INET_ULP_INFO_TLS);
+ if (!start)
+ return -EMSGSIZE;
+
+ rcu_read_lock();
+ ctx = rcu_dereference(inet_csk(sk)->icsk_ulp_data);
+ if (!ctx) {
+ err = 0;
+ goto nla_failure;
+ }
+ version = ctx->prot_info.version;
+ if (version) {
+ err = nla_put_u16(skb, TLS_INFO_VERSION, version);
+ if (err)
+ goto nla_failure;
+ }
+ cipher_type = ctx->prot_info.cipher_type;
+ if (cipher_type) {
+ err = nla_put_u16(skb, TLS_INFO_CIPHER, cipher_type);
+ if (err)
+ goto nla_failure;
+ }
+ err = nla_put_u16(skb, TLS_INFO_TXCONF, tls_user_config(ctx, true));
+ if (err)
+ goto nla_failure;
+
+ err = nla_put_u16(skb, TLS_INFO_RXCONF, tls_user_config(ctx, false));
+ if (err)
+ goto nla_failure;
+
+ if (ctx->tx_conf == TLS_HW && ctx->zerocopy_sendfile) {
+ err = nla_put_flag(skb, TLS_INFO_ZC_RO_TX);
+ if (err)
+ goto nla_failure;
+ }
+ if (ctx->rx_no_pad) {
+ err = nla_put_flag(skb, TLS_INFO_RX_NO_PAD);
+ if (err)
+ goto nla_failure;
+ }
+
+ rcu_read_unlock();
+ nla_nest_end(skb, start);
+ return 0;
+
+nla_failure:
+ rcu_read_unlock();
+ nla_nest_cancel(skb, start);
+ return err;
+}
+
+static size_t tls_get_info_size(const struct sock *sk)
+{
+ size_t size = 0;
+
+ size += nla_total_size(0) + /* INET_ULP_INFO_TLS */
+ nla_total_size(sizeof(u16)) + /* TLS_INFO_VERSION */
+ nla_total_size(sizeof(u16)) + /* TLS_INFO_CIPHER */
+ nla_total_size(sizeof(u16)) + /* TLS_INFO_RXCONF */
+ nla_total_size(sizeof(u16)) + /* TLS_INFO_TXCONF */
+ nla_total_size(0) + /* TLS_INFO_ZC_RO_TX */
+ nla_total_size(0) + /* TLS_INFO_RX_NO_PAD */
+ 0;
+
+ return size;
+}
+
+static int __net_init tls_init_net(struct net *net)
+{
+ int err;
+
+ net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib);
+ if (!net->mib.tls_statistics)
+ return -ENOMEM;
+
+ err = tls_proc_init(net);
+ if (err)
+ goto err_free_stats;
+
+ return 0;
+err_free_stats:
+ free_percpu(net->mib.tls_statistics);
+ return err;
+}
+
+static void __net_exit tls_exit_net(struct net *net)
+{
+ tls_proc_fini(net);
+ free_percpu(net->mib.tls_statistics);
+}
+
+static struct pernet_operations tls_proc_ops = {
+ .init = tls_init_net,
+ .exit = tls_exit_net,
+};
+
+static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
+ .name = "tls",
+ .owner = THIS_MODULE,
+ .init = tls_init,
+ .update = tls_update,
+ .get_info = tls_get_info,
+ .get_info_size = tls_get_info_size,
+};
+
+static int __init tls_register(void)
+{
+ int err;
+
+ err = register_pernet_subsys(&tls_proc_ops);
+ if (err)
+ return err;
+
+ err = tls_strp_dev_init();
+ if (err)
+ goto err_pernet;
+
+ err = tls_device_init();
+ if (err)
+ goto err_strp;
+
+ tcp_register_ulp(&tcp_tls_ulp_ops);
+
+ return 0;
+err_strp:
+ tls_strp_dev_exit();
+err_pernet:
+ unregister_pernet_subsys(&tls_proc_ops);
+ return err;
+}
+
+static void __exit tls_unregister(void)
+{
+ tcp_unregister_ulp(&tcp_tls_ulp_ops);
+ tls_strp_dev_exit();
+ tls_device_cleanup();
+ unregister_pernet_subsys(&tls_proc_ops);
+}
+
+module_init(tls_register);
+module_exit(tls_unregister);