327 lines
10 KiB
C
327 lines
10 KiB
C
/*
|
|
* Copyright (c) 2016 Tom Herbert <tom@herbertland.com>
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _TLS_INT_H
|
|
#define _TLS_INT_H
|
|
|
|
#include <asm/byteorder.h>
|
|
#include <linux/types.h>
|
|
#include <linux/skmsg.h>
|
|
#include <net/tls.h>
|
|
|
|
#define TLS_PAGE_ORDER (min_t(unsigned int, PAGE_ALLOC_COSTLY_ORDER, \
|
|
TLS_MAX_PAYLOAD_SIZE >> PAGE_SHIFT))
|
|
|
|
#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)
|
|
|
|
/* 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[];
|
|
};
|
|
|
|
int __net_init tls_proc_init(struct net *net);
|
|
void __net_exit tls_proc_fini(struct net *net);
|
|
|
|
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_update_rx_zc_capable(struct tls_context *tls_ctx);
|
|
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 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);
|
|
|
|
void tls_sw_write_space(struct sock *sk, struct tls_context *ctx);
|
|
void tls_device_write_space(struct sock *sk, struct tls_context *ctx);
|
|
|
|
int tls_process_cmsg(struct sock *sk, struct msghdr *msg,
|
|
unsigned char *record_type);
|
|
int decrypt_skb(struct sock *sk, struct scatterlist *sgout);
|
|
|
|
int tls_sw_fallback_init(struct sock *sk,
|
|
struct tls_offload_context_tx *offload_ctx,
|
|
struct tls_crypto_info *crypto_info);
|
|
|
|
int tls_strp_dev_init(void);
|
|
void tls_strp_dev_exit(void);
|
|
|
|
void tls_strp_done(struct tls_strparser *strp);
|
|
void tls_strp_stop(struct tls_strparser *strp);
|
|
int tls_strp_init(struct tls_strparser *strp, struct sock *sk);
|
|
void tls_strp_data_ready(struct tls_strparser *strp);
|
|
|
|
void tls_strp_check_rcv(struct tls_strparser *strp);
|
|
void tls_strp_msg_done(struct tls_strparser *strp);
|
|
|
|
int tls_rx_msg_size(struct tls_strparser *strp, struct sk_buff *skb);
|
|
void tls_rx_msg_ready(struct tls_strparser *strp);
|
|
|
|
void tls_strp_msg_load(struct tls_strparser *strp, bool force_refresh);
|
|
int tls_strp_msg_cow(struct tls_sw_context_rx *ctx);
|
|
struct sk_buff *tls_strp_msg_detach(struct tls_sw_context_rx *ctx);
|
|
int tls_strp_msg_hold(struct tls_strparser *strp, struct sk_buff_head *dst);
|
|
|
|
static inline struct tls_msg *tls_msg(struct sk_buff *skb)
|
|
{
|
|
struct sk_skb_cb *scb = (struct sk_skb_cb *)skb->cb;
|
|
|
|
return &scb->tls;
|
|
}
|
|
|
|
static inline struct sk_buff *tls_strp_msg(struct tls_sw_context_rx *ctx)
|
|
{
|
|
DEBUG_NET_WARN_ON_ONCE(!ctx->strp.msg_ready || !ctx->strp.anchor->len);
|
|
return ctx->strp.anchor;
|
|
}
|
|
|
|
static inline bool tls_strp_msg_ready(struct tls_sw_context_rx *ctx)
|
|
{
|
|
return ctx->strp.msg_ready;
|
|
}
|
|
|
|
static inline bool tls_strp_msg_mixed_decrypted(struct tls_sw_context_rx *ctx)
|
|
{
|
|
return ctx->strp.mixed_decrypted;
|
|
}
|
|
|
|
#ifdef CONFIG_TLS_DEVICE
|
|
int tls_device_init(void);
|
|
void tls_device_cleanup(void);
|
|
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);
|
|
int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx);
|
|
#else
|
|
static inline int tls_device_init(void) { return 0; }
|
|
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)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
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 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 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 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_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 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;
|
|
}
|
|
|
|
#endif
|