aboutsummaryrefslogtreecommitdiffstats
path: root/include/net/tls.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/net/tls.h')
-rw-r--r--include/net/tls.h326
1 files changed, 40 insertions, 286 deletions
diff --git a/include/net/tls.h b/include/net/tls.h
index 526cb2c3b724..154949c7b0c8 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -39,7 +39,6 @@
#include <linux/crypto.h>
#include <linux/socket.h>
#include <linux/tcp.h>
-#include <linux/skmsg.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/rcupdate.h>
@@ -50,6 +49,17 @@
#include <crypto/aead.h>
#include <uapi/linux/tls.h>
+struct tls_rec;
+
+struct tls_cipher_size_desc {
+ unsigned int iv;
+ unsigned int key;
+ unsigned int salt;
+ unsigned int tag;
+ unsigned int rec_seq;
+};
+
+extern const struct tls_cipher_size_desc tls_cipher_size_desc[];
/* Maximum data size carried in a TLS record */
#define TLS_MAX_PAYLOAD_SIZE ((size_t)1 << 14)
@@ -64,7 +74,9 @@
#define TLS_AAD_SPACE_SIZE 13
#define MAX_IV_SIZE 16
+#define TLS_TAG_SIZE 16
#define TLS_MAX_REC_SEQ_SIZE 8
+#define TLS_MAX_AAD_SIZE TLS_AAD_SPACE_SIZE
/* For CCM mode, the full 16-bytes of IV is made of '4' fields of given sizes.
*
@@ -76,13 +88,6 @@
#define TLS_AES_CCM_IV_B0_BYTE 2
#define TLS_SM4_CCM_IV_B0_BYTE 2
-#define __TLS_INC_STATS(net, field) \
- __SNMP_INC_STATS((net)->mib.tls_statistics, field)
-#define TLS_INC_STATS(net, field) \
- SNMP_INC_STATS((net)->mib.tls_statistics, field)
-#define TLS_DEC_STATS(net, field) \
- SNMP_DEC_STATS((net)->mib.tls_statistics, field)
-
enum {
TLS_BASE,
TLS_SW,
@@ -91,37 +96,6 @@ enum {
TLS_NUM_CONFIG,
};
-/* TLS records are maintained in 'struct tls_rec'. It stores the memory pages
- * allocated or mapped for each TLS record. After encryption, the records are
- * stores in a linked list.
- */
-struct tls_rec {
- struct list_head list;
- int tx_ready;
- int tx_flags;
-
- struct sk_msg msg_plaintext;
- struct sk_msg msg_encrypted;
-
- /* AAD | msg_plaintext.sg.data | sg_tag */
- struct scatterlist sg_aead_in[2];
- /* AAD | msg_encrypted.sg.data (data contains overhead for hdr & iv & tag) */
- struct scatterlist sg_aead_out[2];
-
- char content_type;
- struct scatterlist sg_content_type;
-
- char aad_space[TLS_AAD_SPACE_SIZE];
- u8 iv_data[MAX_IV_SIZE];
- struct aead_request aead_req;
- u8 aead_req_ctx[];
-};
-
-struct tls_msg {
- struct strp_msg rxm;
- u8 control;
-};
-
struct tx_work {
struct delayed_work work;
struct sock *sk;
@@ -144,21 +118,38 @@ struct tls_sw_context_tx {
unsigned long tx_bitmask;
};
+struct tls_strparser {
+ struct sock *sk;
+
+ u32 mark : 8;
+ u32 stopped : 1;
+ u32 copy_mode : 1;
+ u32 msg_ready : 1;
+
+ struct strp_msg stm;
+
+ struct sk_buff *anchor;
+ struct work_struct work;
+};
+
struct tls_sw_context_rx {
struct crypto_aead *aead_recv;
struct crypto_wait async_wait;
- struct strparser strp;
struct sk_buff_head rx_list; /* list of decrypted 'data' records */
void (*saved_data_ready)(struct sock *sk);
- struct sk_buff *recv_pkt;
- u8 control;
+ u8 reader_present;
u8 async_capable:1;
- u8 decrypted:1;
+ u8 zc_capable:1;
+ u8 reader_contended:1;
+
+ struct tls_strparser strp;
+
atomic_t decrypt_pending;
/* protect crypto_wait with decrypt_pending*/
spinlock_t decrypt_compl_lock;
- bool async_notify;
+ struct sk_buff_head async_hold;
+ struct wait_queue_head wq;
};
struct tls_record_info {
@@ -180,6 +171,8 @@ struct tls_offload_context_tx {
struct scatterlist sg_tx_data[MAX_SKB_FRAGS];
void (*sk_destruct)(struct sock *sk);
+ struct work_struct destruct_work;
+ struct tls_context *ctx;
u8 driver_state[] __aligned(8);
/* The TLS layer reserves room for driver specific state
* Currently the belief is that there is not enough
@@ -245,6 +238,8 @@ struct tls_context {
u8 tx_conf:3;
u8 rx_conf:3;
+ u8 zerocopy_sendfile:1;
+ u8 rx_no_pad:1;
int (*push_pending_record)(struct sock *sk, int flags);
void (*sk_write_space)(struct sock *sk);
@@ -252,7 +247,7 @@ struct tls_context {
void *priv_ctx_tx;
void *priv_ctx_rx;
- struct net_device *netdev;
+ struct net_device __rcu *netdev;
/* rw cache line */
struct cipher_context tx;
@@ -352,43 +347,6 @@ struct tls_offload_context_rx {
#define TLS_OFFLOAD_CONTEXT_SIZE_RX \
(sizeof(struct tls_offload_context_rx) + TLS_DRIVER_STATE_SIZE_RX)
-struct tls_context *tls_ctx_create(struct sock *sk);
-void tls_ctx_free(struct sock *sk, struct tls_context *ctx);
-void update_sk_prot(struct sock *sk, struct tls_context *ctx);
-
-int wait_on_pending_writer(struct sock *sk, long *timeo);
-int tls_sk_query(struct sock *sk, int optname, char __user *optval,
- int __user *optlen);
-int tls_sk_attach(struct sock *sk, int optname, char __user *optval,
- unsigned int optlen);
-void tls_err_abort(struct sock *sk, int err);
-
-int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx);
-void tls_sw_strparser_arm(struct sock *sk, struct tls_context *ctx);
-void tls_sw_strparser_done(struct tls_context *tls_ctx);
-int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
-int tls_sw_sendpage_locked(struct sock *sk, struct page *page,
- int offset, size_t size, int flags);
-int tls_sw_sendpage(struct sock *sk, struct page *page,
- int offset, size_t size, int flags);
-void tls_sw_cancel_work_tx(struct tls_context *tls_ctx);
-void tls_sw_release_resources_tx(struct sock *sk);
-void tls_sw_free_ctx_tx(struct tls_context *tls_ctx);
-void tls_sw_free_resources_rx(struct sock *sk);
-void tls_sw_release_resources_rx(struct sock *sk);
-void tls_sw_free_ctx_rx(struct tls_context *tls_ctx);
-int tls_sw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
- int nonblock, int flags, int *addr_len);
-bool tls_sw_sock_is_readable(struct sock *sk);
-ssize_t tls_sw_splice_read(struct socket *sock, loff_t *ppos,
- struct pipe_inode_info *pipe,
- size_t len, unsigned int flags);
-
-int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
-int tls_device_sendpage(struct sock *sk, struct page *page,
- int offset, size_t size, int flags);
-int tls_tx_records(struct sock *sk, int flags);
-
struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context,
u32 seq, u64 *p_record_sn);
@@ -402,56 +360,6 @@ static inline u32 tls_record_start_seq(struct tls_record_info *rec)
return rec->end_seq - rec->len;
}
-int tls_push_sg(struct sock *sk, struct tls_context *ctx,
- struct scatterlist *sg, u16 first_offset,
- int flags);
-int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
- int flags);
-void tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
-
-static inline struct tls_msg *tls_msg(struct sk_buff *skb)
-{
- return (struct tls_msg *)strp_msg(skb);
-}
-
-static inline bool tls_is_partially_sent_record(struct tls_context *ctx)
-{
- return !!ctx->partially_sent_record;
-}
-
-static inline bool tls_is_pending_open_record(struct tls_context *tls_ctx)
-{
- return tls_ctx->pending_open_record_frags;
-}
-
-static inline bool is_tx_ready(struct tls_sw_context_tx *ctx)
-{
- struct tls_rec *rec;
-
- rec = list_first_entry(&ctx->tx_list, struct tls_rec, list);
- if (!rec)
- return false;
-
- return READ_ONCE(rec->tx_ready);
-}
-
-static inline 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;
-}
-
struct sk_buff *
tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
struct sk_buff *skb);
@@ -470,31 +378,6 @@ static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk)
#endif
}
-static inline bool tls_bigint_increment(unsigned char *seq, int len)
-{
- int i;
-
- for (i = len - 1; i >= 0; i--) {
- ++seq[i];
- if (seq[i] != 0)
- break;
- }
-
- return (i == -1);
-}
-
-static inline void tls_bigint_subtract(unsigned char *seq, int n)
-{
- u64 rcd_sn;
- __be64 *p;
-
- BUILD_BUG_ON(TLS_MAX_REC_SEQ_SIZE != 8);
-
- p = (__be64 *)seq;
- rcd_sn = be64_to_cpu(*p);
- *p = cpu_to_be64(rcd_sn - n);
-}
-
static inline struct tls_context *tls_get_ctx(const struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
@@ -505,82 +388,6 @@ static inline struct tls_context *tls_get_ctx(const struct sock *sk)
return (__force void *)icsk->icsk_ulp_data;
}
-static inline void tls_advance_record_sn(struct sock *sk,
- struct tls_prot_info *prot,
- struct cipher_context *ctx)
-{
- if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
- tls_err_abort(sk, -EBADMSG);
-
- if (prot->version != TLS_1_3_VERSION &&
- prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305)
- tls_bigint_increment(ctx->iv + prot->salt_size,
- prot->iv_size);
-}
-
-static inline void tls_fill_prepend(struct tls_context *ctx,
- char *buf,
- size_t plaintext_len,
- unsigned char record_type)
-{
- struct tls_prot_info *prot = &ctx->prot_info;
- size_t pkt_len, iv_size = prot->iv_size;
-
- pkt_len = plaintext_len + prot->tag_size;
- if (prot->version != TLS_1_3_VERSION &&
- prot->cipher_type != TLS_CIPHER_CHACHA20_POLY1305) {
- pkt_len += iv_size;
-
- memcpy(buf + TLS_NONCE_OFFSET,
- ctx->tx.iv + prot->salt_size, iv_size);
- }
-
- /* we cover nonce explicit here as well, so buf should be of
- * size KTLS_DTLS_HEADER_SIZE + KTLS_DTLS_NONCE_EXPLICIT_SIZE
- */
- buf[0] = prot->version == TLS_1_3_VERSION ?
- TLS_RECORD_TYPE_DATA : record_type;
- /* Note that VERSION must be TLS_1_2 for both TLS1.2 and TLS1.3 */
- buf[1] = TLS_1_2_VERSION_MINOR;
- buf[2] = TLS_1_2_VERSION_MAJOR;
- /* we can use IV for nonce explicit according to spec */
- buf[3] = pkt_len >> 8;
- buf[4] = pkt_len & 0xFF;
-}
-
-static inline void tls_make_aad(char *buf,
- size_t size,
- char *record_sequence,
- unsigned char record_type,
- struct tls_prot_info *prot)
-{
- if (prot->version != TLS_1_3_VERSION) {
- memcpy(buf, record_sequence, prot->rec_seq_size);
- buf += 8;
- } else {
- size += prot->tag_size;
- }
-
- buf[0] = prot->version == TLS_1_3_VERSION ?
- TLS_RECORD_TYPE_DATA : record_type;
- buf[1] = TLS_1_2_VERSION_MAJOR;
- buf[2] = TLS_1_2_VERSION_MINOR;
- buf[3] = size >> 8;
- buf[4] = size & 0xFF;
-}
-
-static inline void xor_iv_with_seq(struct tls_prot_info *prot, char *iv, char *seq)
-{
- int i;
-
- if (prot->version == TLS_1_3_VERSION ||
- prot->cipher_type == TLS_CIPHER_CHACHA20_POLY1305) {
- for (i = 0; i < 8; i++)
- iv[i + 4] ^= seq[i];
- }
-}
-
-
static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
const struct tls_context *tls_ctx)
{
@@ -617,16 +424,12 @@ static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
return !!tls_sw_ctx_rx(ctx);
}
-void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
-void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
-
static inline struct tls_offload_context_rx *
tls_offload_ctx_rx(const struct tls_context *tls_ctx)
{
return (struct tls_offload_context_rx *)tls_ctx->priv_ctx_rx;
}
-#if IS_ENABLED(CONFIG_TLS_DEVICE)
static inline void *__tls_driver_ctx(struct tls_context *tls_ctx,
enum tls_offload_ctx_dir direction)
{
@@ -641,7 +444,6 @@ tls_driver_ctx(const struct sock *sk, enum tls_offload_ctx_dir direction)
{
return __tls_driver_ctx(tls_get_ctx(sk), direction);
}
-#endif
#define RESYNC_REQ BIT(0)
#define RESYNC_REQ_ASYNC BIT(1)
@@ -696,31 +498,11 @@ static inline bool tls_offload_tx_resync_pending(struct sock *sk)
return ret;
}
-int __net_init tls_proc_init(struct net *net);
-void __net_exit tls_proc_fini(struct net *net);
-
-int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
- unsigned char *record_type);
-int decrypt_skb(struct sock *sk, struct sk_buff *skb,
- struct scatterlist *sgout);
struct sk_buff *tls_encrypt_skb(struct sk_buff *skb);
-int tls_sw_fallback_init(struct sock *sk,
- struct tls_offload_context_tx *offload_ctx,
- struct tls_crypto_info *crypto_info);
-
#ifdef CONFIG_TLS_DEVICE
-void tls_device_init(void);
-void tls_device_cleanup(void);
void tls_device_sk_destruct(struct sock *sk);
-int tls_set_device_offload(struct sock *sk, struct tls_context *ctx);
-void tls_device_free_resources_tx(struct sock *sk);
-int tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx);
-void tls_device_offload_cleanup_rx(struct sock *sk);
-void tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq);
void tls_offload_tx_resync_request(struct sock *sk, u32 got_seq, u32 exp_seq);
-int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
- struct sk_buff *skb, struct strp_msg *rxm);
static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
{
@@ -729,33 +511,5 @@ static inline bool tls_is_sk_rx_device_offloaded(struct sock *sk)
return false;
return tls_get_ctx(sk)->rx_conf == TLS_HW;
}
-#else
-static inline void tls_device_init(void) {}
-static inline void tls_device_cleanup(void) {}
-
-static inline int
-tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
-{
- return -EOPNOTSUPP;
-}
-
-static inline void tls_device_free_resources_tx(struct sock *sk) {}
-
-static inline int
-tls_set_device_offload_rx(struct sock *sk, struct tls_context *ctx)
-{
- return -EOPNOTSUPP;
-}
-
-static inline void tls_device_offload_cleanup_rx(struct sock *sk) {}
-static inline void
-tls_device_rx_resync_new_rec(struct sock *sk, u32 rcd_len, u32 seq) {}
-
-static inline int
-tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx,
- struct sk_buff *skb, struct strp_msg *rxm)
-{
- return 0;
-}
#endif
#endif /* _TLS_OFFLOAD_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.