[PATCH net-next] net/tls: Move protocol constants from cipher context to tls context

* [PATCH net-next] net/tls: Move protocol constants from cipher context to tls context
@ 2019-02-14  7:11 Vakul Garg
  2019-02-17  2:14 ` David Miller
  0 siblings, 1 reply; 3+ messages in thread
From: Vakul Garg @ 2019-02-14  7:11 UTC (permalink / raw)
  To: netdev; +Cc: borisp, aviadye, davejwatson, davem, doronrk, Vakul Garg

Each tls context maintains two cipher contexts (one each for tx and rx
directions). For each tls session, the constants such as protocol
version, ciphersuite, iv size, associated data size etc are same for
both the directions and need to be stored only once per tls context.
Hence these are moved from 'struct cipher_context' to 'struct
tls_prot_info' and stored only once in 'struct tls_context'.

Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
---
 include/net/tls.h    |  46 +++++++++-----
 net/tls/tls_device.c |  24 ++++---
 net/tls/tls_main.c   |  17 ++++-
 net/tls/tls_sw.c     | 172 +++++++++++++++++++++++++++------------------------
 4 files changed, 149 insertions(+), 110 deletions(-)

diff --git a/include/net/tls.h b/include/net/tls.h
index a93a8ed8f716..a8b37226a287 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -199,15 +199,8 @@ enum {
 };
 
 struct cipher_context {
-	u16 prepend_size;
-	u16 tag_size;
-	u16 overhead_size;
-	u16 iv_size;
 	char *iv;
-	u16 rec_seq_size;
 	char *rec_seq;
-	u16 aad_size;
-	u16 tail_size;
 };
 
 union tls_crypto_context {
@@ -218,7 +211,21 @@ union tls_crypto_context {
 	};
 };
 
+struct tls_prot_info {
+	u16 version;
+	u16 cipher_type;
+	u16 prepend_size;
+	u16 tag_size;
+	u16 overhead_size;
+	u16 iv_size;
+	u16 rec_seq_size;
+	u16 aad_size;
+	u16 tail_size;
+};
+
 struct tls_context {
+	struct tls_prot_info prot_info;
+
 	union tls_crypto_context crypto_send;
 	union tls_crypto_context crypto_recv;
 
@@ -401,16 +408,26 @@ static inline bool tls_bigint_increment(unsigned char *seq, int len)
 	return (i == -1);
 }
 
+static inline struct tls_context *tls_get_ctx(const struct sock *sk)
+{
+	struct inet_connection_sock *icsk = inet_csk(sk);
+
+	return icsk->icsk_ulp_data;
+}
+
 static inline void tls_advance_record_sn(struct sock *sk,
 					 struct cipher_context *ctx,
 					 int version)
 {
-	if (tls_bigint_increment(ctx->rec_seq, ctx->rec_seq_size))
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
+
+	if (tls_bigint_increment(ctx->rec_seq, prot->rec_seq_size))
 		tls_err_abort(sk, EBADMSG);
 
 	if (version != TLS_1_3_VERSION) {
 		tls_bigint_increment(ctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
-				     ctx->iv_size);
+				     prot->iv_size);
 	}
 }
 
@@ -420,9 +437,10 @@ static inline void tls_fill_prepend(struct tls_context *ctx,
 			     unsigned char record_type,
 			     int version)
 {
-	size_t pkt_len, iv_size = ctx->tx.iv_size;
+	struct tls_prot_info *prot = &ctx->prot_info;
+	size_t pkt_len, iv_size = prot->iv_size;
 
-	pkt_len = plaintext_len + ctx->tx.tag_size;
+	pkt_len = plaintext_len + prot->tag_size;
 	if (version != TLS_1_3_VERSION) {
 		pkt_len += iv_size;
 
@@ -475,12 +493,6 @@ static inline void xor_iv_with_seq(int version, char *iv, char *seq)
 	}
 }
 
-static inline struct tls_context *tls_get_ctx(const struct sock *sk)
-{
-	struct inet_connection_sock *icsk = inet_csk(sk);
-
-	return icsk->icsk_ulp_data;
-}
 
 static inline struct tls_sw_context_rx *tls_sw_ctx_rx(
 		const struct tls_context *tls_ctx)
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 7ee9008b2187..a5c17c47d08a 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -247,6 +247,7 @@ static int tls_push_record(struct sock *sk,
 			   int flags,
 			   unsigned char record_type)
 {
+	struct tls_prot_info *prot = &ctx->prot_info;
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct page_frag dummy_tag_frag;
 	skb_frag_t *frag;
@@ -256,7 +257,7 @@ static int tls_push_record(struct sock *sk,
 	frag = &record->frags[0];
 	tls_fill_prepend(ctx,
 			 skb_frag_address(frag),
-			 record->len - ctx->tx.prepend_size,
+			 record->len - prot->prepend_size,
 			 record_type,
 			 ctx->crypto_send.info.version);
 
@@ -264,7 +265,7 @@ static int tls_push_record(struct sock *sk,
 	dummy_tag_frag.page = skb_frag_page(frag);
 	dummy_tag_frag.offset = 0;
 
-	tls_append_frag(record, &dummy_tag_frag, ctx->tx.tag_size);
+	tls_append_frag(record, &dummy_tag_frag, prot->tag_size);
 	record->end_seq = tp->write_seq + record->len;
 	spin_lock_irq(&offload_ctx->lock);
 	list_add_tail(&record->list, &offload_ctx->records_list);
@@ -347,6 +348,7 @@ static int tls_push_data(struct sock *sk,
 			 unsigned char record_type)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx);
 	int tls_push_record_flags = flags | MSG_SENDPAGE_NOTLAST;
 	int more = flags & (MSG_SENDPAGE_NOTLAST | MSG_MORE);
@@ -376,10 +378,10 @@ static int tls_push_data(struct sock *sk,
 	 * we need to leave room for an authentication tag.
 	 */
 	max_open_record_len = TLS_MAX_PAYLOAD_SIZE +
-			      tls_ctx->tx.prepend_size;
+			      prot->prepend_size;
 	do {
 		rc = tls_do_allocation(sk, ctx, pfrag,
-				       tls_ctx->tx.prepend_size);
+				       prot->prepend_size);
 		if (rc) {
 			rc = sk_stream_wait_memory(sk, &timeo);
 			if (!rc)
@@ -397,7 +399,7 @@ static int tls_push_data(struct sock *sk,
 				size = orig_size;
 				destroy_record(record);
 				ctx->open_record = NULL;
-			} else if (record->len > tls_ctx->tx.prepend_size) {
+			} else if (record->len > prot->prepend_size) {
 				goto last_record;
 			}
 
@@ -658,6 +660,8 @@ int tls_device_decrypted(struct sock *sk, struct sk_buff *skb)
 int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 {
 	u16 nonce_size, tag_size, iv_size, rec_seq_size;
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_record_info *start_marker_record;
 	struct tls_offload_context_tx *offload_ctx;
 	struct tls_crypto_info *crypto_info;
@@ -703,10 +707,10 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 		goto free_offload_ctx;
 	}
 
-	ctx->tx.prepend_size = TLS_HEADER_SIZE + nonce_size;
-	ctx->tx.tag_size = tag_size;
-	ctx->tx.overhead_size = ctx->tx.prepend_size + ctx->tx.tag_size;
-	ctx->tx.iv_size = iv_size;
+	prot->prepend_size = TLS_HEADER_SIZE + nonce_size;
+	prot->tag_size = tag_size;
+	prot->overhead_size = prot->prepend_size + prot->tag_size;
+	prot->iv_size = iv_size;
 	ctx->tx.iv = kmalloc(iv_size + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
 			     GFP_KERNEL);
 	if (!ctx->tx.iv) {
@@ -716,7 +720,7 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 
 	memcpy(ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv, iv_size);
 
-	ctx->tx.rec_seq_size = rec_seq_size;
+	prot->rec_seq_size = rec_seq_size;
 	ctx->tx.rec_seq = kmemdup(rec_seq, rec_seq_size, GFP_KERNEL);
 	if (!ctx->tx.rec_seq) {
 		rc = -ENOMEM;
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index d1c2fd9a3f63..caff15b2f9b2 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -435,6 +435,7 @@ static int do_tls_setsockopt_conf(struct sock *sk, char __user *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;
@@ -445,10 +446,13 @@ static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval,
 		goto out;
 	}
 
-	if (tx)
+	if (tx) {
 		crypto_info = &ctx->crypto_send.info;
-	else
+		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)) {
@@ -469,6 +473,15 @@ static int do_tls_setsockopt_conf(struct sock *sk, char __user *optval,
 		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:
 	case TLS_CIPHER_AES_GCM_256: {
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index ae4784734547..71be8acfbc9b 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -127,7 +127,7 @@ static int padding_length(struct tls_sw_context_rx *ctx,
 	int sub = 0;
 
 	/* Determine zero-padding length */
-	if (tls_ctx->crypto_recv.info.version == TLS_1_3_VERSION) {
+	if (tls_ctx->prot_info.version == TLS_1_3_VERSION) {
 		char content_type = 0;
 		int err;
 		int back = 17;
@@ -155,6 +155,7 @@ static void tls_decrypt_done(struct crypto_async_request *req, int err)
 	struct scatterlist *sgin = aead_req->src;
 	struct tls_sw_context_rx *ctx;
 	struct tls_context *tls_ctx;
+	struct tls_prot_info *prot;
 	struct scatterlist *sg;
 	struct sk_buff *skb;
 	unsigned int pages;
@@ -163,6 +164,7 @@ static void tls_decrypt_done(struct crypto_async_request *req, int err)
 	skb = (struct sk_buff *)req->data;
 	tls_ctx = tls_get_ctx(skb->sk);
 	ctx = tls_sw_ctx_rx(tls_ctx);
+	prot = &tls_ctx->prot_info;
 
 	/* Propagate if there was an err */
 	if (err) {
@@ -171,8 +173,8 @@ static void tls_decrypt_done(struct crypto_async_request *req, int err)
 	} else {
 		struct strp_msg *rxm = strp_msg(skb);
 		rxm->full_len -= padding_length(ctx, tls_ctx, skb);
-		rxm->offset += tls_ctx->rx.prepend_size;
-		rxm->full_len -= tls_ctx->rx.overhead_size;
+		rxm->offset += prot->prepend_size;
+		rxm->full_len -= prot->overhead_size;
 	}
 
 	/* After using skb->sk to propagate sk through crypto async callback
@@ -209,13 +211,14 @@ static int tls_do_decryption(struct sock *sk,
 			     bool async)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
 	int ret;
 
 	aead_request_set_tfm(aead_req, ctx->aead_recv);
-	aead_request_set_ad(aead_req, tls_ctx->rx.aad_size);
+	aead_request_set_ad(aead_req, prot->aad_size);
 	aead_request_set_crypt(aead_req, sgin, sgout,
-			       data_len + tls_ctx->rx.tag_size,
+			       data_len + prot->tag_size,
 			       (u8 *)iv_recv);
 
 	if (async) {
@@ -253,12 +256,13 @@ static int tls_do_decryption(struct sock *sk,
 static void tls_trim_both_msgs(struct sock *sk, int target_size)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
 	struct tls_rec *rec = ctx->open_rec;
 
 	sk_msg_trim(sk, &rec->msg_plaintext, target_size);
 	if (target_size > 0)
-		target_size += tls_ctx->tx.overhead_size;
+		target_size += prot->overhead_size;
 	sk_msg_trim(sk, &rec->msg_encrypted, target_size);
 }
 
@@ -275,6 +279,7 @@ static int tls_alloc_encrypted_msg(struct sock *sk, int len)
 static int tls_clone_plaintext_msg(struct sock *sk, int required)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
 	struct tls_rec *rec = ctx->open_rec;
 	struct sk_msg *msg_pl = &rec->msg_plaintext;
@@ -290,7 +295,7 @@ static int tls_clone_plaintext_msg(struct sock *sk, int required)
 	/* Skip initial bytes in msg_en's data to be able to use
 	 * same offset of both plain and encrypted data.
 	 */
-	skip = tls_ctx->tx.prepend_size + msg_pl->sg.size;
+	skip = prot->prepend_size + msg_pl->sg.size;
 
 	return sk_msg_clone(sk, msg_pl, msg_en, skip, len);
 }
@@ -298,6 +303,7 @@ static int tls_clone_plaintext_msg(struct sock *sk, int required)
 static struct tls_rec *tls_get_rec(struct sock *sk)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
 	struct sk_msg *msg_pl, *msg_en;
 	struct tls_rec *rec;
@@ -316,13 +322,11 @@ static struct tls_rec *tls_get_rec(struct sock *sk)
 	sk_msg_init(msg_en);
 
 	sg_init_table(rec->sg_aead_in, 2);
-	sg_set_buf(&rec->sg_aead_in[0], rec->aad_space,
-		   tls_ctx->tx.aad_size);
+	sg_set_buf(&rec->sg_aead_in[0], rec->aad_space, prot->aad_size);
 	sg_unmark_end(&rec->sg_aead_in[1]);
 
 	sg_init_table(rec->sg_aead_out, 2);
-	sg_set_buf(&rec->sg_aead_out[0], rec->aad_space,
-		   tls_ctx->tx.aad_size);
+	sg_set_buf(&rec->sg_aead_out[0], rec->aad_space, prot->aad_size);
 	sg_unmark_end(&rec->sg_aead_out[1]);
 
 	return rec;
@@ -411,6 +415,7 @@ static void tls_encrypt_done(struct crypto_async_request *req, int err)
 	struct aead_request *aead_req = (struct aead_request *)req;
 	struct sock *sk = req->data;
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
 	struct scatterlist *sge;
 	struct sk_msg *msg_en;
@@ -422,8 +427,8 @@ static void tls_encrypt_done(struct crypto_async_request *req, int err)
 	msg_en = &rec->msg_encrypted;
 
 	sge = sk_msg_elem(msg_en, msg_en->sg.curr);
-	sge->offset -= tls_ctx->tx.prepend_size;
-	sge->length += tls_ctx->tx.prepend_size;
+	sge->offset -= prot->prepend_size;
+	sge->length += prot->prepend_size;
 
 	/* Check if error is previously set on socket */
 	if (err || sk->sk_err) {
@@ -470,22 +475,23 @@ static int tls_do_encryption(struct sock *sk,
 			     struct aead_request *aead_req,
 			     size_t data_len, u32 start)
 {
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_rec *rec = ctx->open_rec;
 	struct sk_msg *msg_en = &rec->msg_encrypted;
 	struct scatterlist *sge = sk_msg_elem(msg_en, start);
 	int rc;
 
 	memcpy(rec->iv_data, tls_ctx->tx.iv, sizeof(rec->iv_data));
-	xor_iv_with_seq(tls_ctx->crypto_send.info.version, rec->iv_data,
+	xor_iv_with_seq(prot->version, rec->iv_data,
 			tls_ctx->tx.rec_seq);
 
-	sge->offset += tls_ctx->tx.prepend_size;
-	sge->length -= tls_ctx->tx.prepend_size;
+	sge->offset += prot->prepend_size;
+	sge->length -= prot->prepend_size;
 
 	msg_en->sg.curr = start;
 
 	aead_request_set_tfm(aead_req, ctx->aead_send);
-	aead_request_set_ad(aead_req, tls_ctx->tx.aad_size);
+	aead_request_set_ad(aead_req, prot->aad_size);
 	aead_request_set_crypt(aead_req, rec->sg_aead_in,
 			       rec->sg_aead_out,
 			       data_len, rec->iv_data);
@@ -500,8 +506,8 @@ static int tls_do_encryption(struct sock *sk,
 	rc = crypto_aead_encrypt(aead_req);
 	if (!rc || rc != -EINPROGRESS) {
 		atomic_dec(&ctx->encrypt_pending);
-		sge->offset -= tls_ctx->tx.prepend_size;
-		sge->length += tls_ctx->tx.prepend_size;
+		sge->offset -= prot->prepend_size;
+		sge->length += prot->prepend_size;
 	}
 
 	if (!rc) {
@@ -513,8 +519,7 @@ static int tls_do_encryption(struct sock *sk,
 
 	/* Unhook the record from context if encryption is not failure */
 	ctx->open_rec = NULL;
-	tls_advance_record_sn(sk, &tls_ctx->tx,
-			      tls_ctx->crypto_send.info.version);
+	tls_advance_record_sn(sk, &tls_ctx->tx, prot->version);
 	return rc;
 }
 
@@ -640,6 +645,7 @@ static int tls_push_record(struct sock *sk, int flags,
 			   unsigned char record_type)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
 	struct tls_rec *rec = ctx->open_rec, *tmp = NULL;
 	u32 i, split_point, uninitialized_var(orig_end);
@@ -658,12 +664,12 @@ static int tls_push_record(struct sock *sk, int flags,
 	split = split_point && split_point < msg_pl->sg.size;
 	if (split) {
 		rc = tls_split_open_record(sk, rec, &tmp, msg_pl, msg_en,
-					   split_point, tls_ctx->tx.overhead_size,
+					   split_point, prot->overhead_size,
 					   &orig_end);
 		if (rc < 0)
 			return rc;
 		sk_msg_trim(sk, msg_en, msg_pl->sg.size +
-			    tls_ctx->tx.overhead_size);
+			    prot->overhead_size);
 	}
 
 	rec->tx_flags = flags;
@@ -673,7 +679,7 @@ static int tls_push_record(struct sock *sk, int flags,
 	sk_msg_iter_var_prev(i);
 
 	rec->content_type = record_type;
-	if (tls_ctx->crypto_send.info.version == TLS_1_3_VERSION) {
+	if (prot->version == TLS_1_3_VERSION) {
 		/* Add content type to end of message.  No padding added */
 		sg_set_buf(&rec->sg_content_type, &rec->content_type, 1);
 		sg_mark_end(&rec->sg_content_type);
@@ -694,22 +700,20 @@ static int tls_push_record(struct sock *sk, int flags,
 	i = msg_en->sg.start;
 	sg_chain(rec->sg_aead_out, 2, &msg_en->sg.data[i]);
 
-	tls_make_aad(rec->aad_space, msg_pl->sg.size + tls_ctx->tx.tail_size,
-		     tls_ctx->tx.rec_seq, tls_ctx->tx.rec_seq_size,
-		     record_type,
-		     tls_ctx->crypto_send.info.version);
+	tls_make_aad(rec->aad_space, msg_pl->sg.size + prot->tail_size,
+		     tls_ctx->tx.rec_seq, prot->rec_seq_size,
+		     record_type, prot->version);
 
 	tls_fill_prepend(tls_ctx,
 			 page_address(sg_page(&msg_en->sg.data[i])) +
 			 msg_en->sg.data[i].offset,
-			 msg_pl->sg.size + tls_ctx->tx.tail_size,
-			 record_type,
-			 tls_ctx->crypto_send.info.version);
+			 msg_pl->sg.size + prot->tail_size,
+			 record_type, prot->version);
 
 	tls_ctx->pending_open_record_frags = false;
 
 	rc = tls_do_encryption(sk, tls_ctx, ctx, req,
-			       msg_pl->sg.size + tls_ctx->tx.tail_size, i);
+			       msg_pl->sg.size + prot->tail_size, i);
 	if (rc < 0) {
 		if (rc != -EINPROGRESS) {
 			tls_err_abort(sk, EBADMSG);
@@ -723,8 +727,7 @@ static int tls_push_record(struct sock *sk, int flags,
 	} else if (split) {
 		msg_pl = &tmp->msg_plaintext;
 		msg_en = &tmp->msg_encrypted;
-		sk_msg_trim(sk, msg_en, msg_pl->sg.size +
-			    tls_ctx->tx.overhead_size);
+		sk_msg_trim(sk, msg_en, msg_pl->sg.size + prot->overhead_size);
 		tls_ctx->pending_open_record_frags = true;
 		ctx->open_rec = tmp;
 	}
@@ -859,6 +862,7 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
 {
 	long timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
 	bool async_capable = ctx->async_capable;
 	unsigned char record_type = TLS_RECORD_TYPE_DATA;
@@ -925,7 +929,7 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
 		}
 
 		required_size = msg_pl->sg.size + try_to_copy +
-				tls_ctx->tx.overhead_size;
+				prot->overhead_size;
 
 		if (!sk_stream_memory_free(sk))
 			goto wait_for_sndbuf;
@@ -994,8 +998,8 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
 			 */
 			try_to_copy -= required_size - msg_pl->sg.size;
 			full_record = true;
-			sk_msg_trim(sk, msg_en, msg_pl->sg.size +
-				    tls_ctx->tx.overhead_size);
+			sk_msg_trim(sk, msg_en,
+				    msg_pl->sg.size + prot->overhead_size);
 		}
 
 		if (try_to_copy) {
@@ -1081,6 +1085,7 @@ static int tls_sw_do_sendpage(struct sock *sk, struct page *page,
 	long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_tx *ctx = tls_sw_ctx_tx(tls_ctx);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	unsigned char record_type = TLS_RECORD_TYPE_DATA;
 	struct sk_msg *msg_pl;
 	struct tls_rec *rec;
@@ -1130,8 +1135,7 @@ static int tls_sw_do_sendpage(struct sock *sk, struct page *page,
 			full_record = true;
 		}
 
-		required_size = msg_pl->sg.size + copy +
-				tls_ctx->tx.overhead_size;
+		required_size = msg_pl->sg.size + copy + prot->overhead_size;
 
 		if (!sk_stream_memory_free(sk))
 			goto wait_for_sndbuf;
@@ -1330,6 +1334,7 @@ static int decrypt_internal(struct sock *sk, struct sk_buff *skb,
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct strp_msg *rxm = strp_msg(skb);
 	int n_sgin, n_sgout, nsg, mem_size, aead_size, err, pages = 0;
 	struct aead_request *aead_req;
@@ -1337,16 +1342,16 @@ static int decrypt_internal(struct sock *sk, struct sk_buff *skb,
 	u8 *aad, *iv, *mem = NULL;
 	struct scatterlist *sgin = NULL;
 	struct scatterlist *sgout = NULL;
-	const int data_len = rxm->full_len - tls_ctx->rx.overhead_size +
-		tls_ctx->rx.tail_size;
+	const int data_len = rxm->full_len - prot->overhead_size +
+			     prot->tail_size;
 
 	if (*zc && (out_iov || out_sg)) {
 		if (out_iov)
 			n_sgout = iov_iter_npages(out_iov, INT_MAX) + 1;
 		else
 			n_sgout = sg_nents(out_sg);
-		n_sgin = skb_nsg(skb, rxm->offset + tls_ctx->rx.prepend_size,
-				 rxm->full_len - tls_ctx->rx.prepend_size);
+		n_sgin = skb_nsg(skb, rxm->offset + prot->prepend_size,
+				 rxm->full_len - prot->prepend_size);
 	} else {
 		n_sgout = 0;
 		*zc = false;
@@ -1363,7 +1368,7 @@ static int decrypt_internal(struct sock *sk, struct sk_buff *skb,
 
 	aead_size = sizeof(*aead_req) + crypto_aead_reqsize(ctx->aead_recv);
 	mem_size = aead_size + (nsg * sizeof(struct scatterlist));
-	mem_size = mem_size + tls_ctx->rx.aad_size;
+	mem_size = mem_size + prot->aad_size;
 	mem_size = mem_size + crypto_aead_ivsize(ctx->aead_recv);
 
 	/* Allocate a single block of memory which contains
@@ -1379,37 +1384,35 @@ static int decrypt_internal(struct sock *sk, struct sk_buff *skb,
 	sgin = (struct scatterlist *)(mem + aead_size);
 	sgout = sgin + n_sgin;
 	aad = (u8 *)(sgout + n_sgout);
-	iv = aad + tls_ctx->rx.aad_size;
+	iv = aad + prot->aad_size;
 
 	/* Prepare IV */
 	err = skb_copy_bits(skb, rxm->offset + TLS_HEADER_SIZE,
 			    iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
-			    tls_ctx->rx.iv_size);
+			    prot->iv_size);
 	if (err < 0) {
 		kfree(mem);
 		return err;
 	}
-	if (tls_ctx->crypto_recv.info.version == TLS_1_3_VERSION)
+	if (prot->version == TLS_1_3_VERSION)
 		memcpy(iv, tls_ctx->rx.iv, crypto_aead_ivsize(ctx->aead_recv));
 	else
 		memcpy(iv, tls_ctx->rx.iv, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
 
-	xor_iv_with_seq(tls_ctx->crypto_recv.info.version, iv,
-			tls_ctx->rx.rec_seq);
+	xor_iv_with_seq(prot->version, iv, tls_ctx->rx.rec_seq);
 
 	/* Prepare AAD */
-	tls_make_aad(aad, rxm->full_len - tls_ctx->rx.overhead_size +
-		     tls_ctx->rx.tail_size,
-		     tls_ctx->rx.rec_seq, tls_ctx->rx.rec_seq_size,
-		     ctx->control,
-		     tls_ctx->crypto_recv.info.version);
+	tls_make_aad(aad, rxm->full_len - prot->overhead_size +
+		     prot->tail_size,
+		     tls_ctx->rx.rec_seq, prot->rec_seq_size,
+		     ctx->control, prot->version);
 
 	/* Prepare sgin */
 	sg_init_table(sgin, n_sgin);
-	sg_set_buf(&sgin[0], aad, tls_ctx->rx.aad_size);
+	sg_set_buf(&sgin[0], aad, prot->aad_size);
 	err = skb_to_sgvec(skb, &sgin[1],
-			   rxm->offset + tls_ctx->rx.prepend_size,
-			   rxm->full_len - tls_ctx->rx.prepend_size);
+			   rxm->offset + prot->prepend_size,
+			   rxm->full_len - prot->prepend_size);
 	if (err < 0) {
 		kfree(mem);
 		return err;
@@ -1418,7 +1421,7 @@ static int decrypt_internal(struct sock *sk, struct sk_buff *skb,
 	if (n_sgout) {
 		if (out_iov) {
 			sg_init_table(sgout, n_sgout);
-			sg_set_buf(&sgout[0], aad, tls_ctx->rx.aad_size);
+			sg_set_buf(&sgout[0], aad, prot->aad_size);
 
 			*chunk = 0;
 			err = tls_setup_from_iter(sk, out_iov, data_len,
@@ -1459,7 +1462,8 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
-	int version = tls_ctx->crypto_recv.info.version;
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
+	int version = prot->version;
 	struct strp_msg *rxm = strp_msg(skb);
 	int err = 0;
 
@@ -1480,8 +1484,8 @@ static int decrypt_skb_update(struct sock *sk, struct sk_buff *skb,
 
 		rxm->full_len -= padding_length(ctx, tls_ctx, skb);
 
-		rxm->offset += tls_ctx->rx.prepend_size;
-		rxm->full_len -= tls_ctx->rx.overhead_size;
+		rxm->offset += prot->prepend_size;
+		rxm->full_len -= prot->overhead_size;
 		tls_advance_record_sn(sk, &tls_ctx->rx, version);
 		ctx->decrypted = true;
 		ctx->saved_data_ready(sk);
@@ -1605,6 +1609,7 @@ int tls_sw_recvmsg(struct sock *sk,
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct sk_psock *psock;
 	unsigned char control = 0;
 	ssize_t decrypted = 0;
@@ -1667,11 +1672,11 @@ int tls_sw_recvmsg(struct sock *sk,
 
 		rxm = strp_msg(skb);
 
-		to_decrypt = rxm->full_len - tls_ctx->rx.overhead_size;
+		to_decrypt = rxm->full_len - prot->overhead_size;
 
 		if (to_decrypt <= len && !is_kvec && !is_peek &&
 		    ctx->control == TLS_RECORD_TYPE_DATA &&
-		    tls_ctx->crypto_recv.info.version != TLS_1_3_VERSION)
+		    prot->version != TLS_1_3_VERSION)
 			zc = true;
 
 		/* Do not use async mode if record is non-data */
@@ -1875,6 +1880,7 @@ static int tls_read_size(struct strparser *strp, struct sk_buff *skb)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(strp->sk);
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	char header[TLS_HEADER_SIZE + MAX_IV_SIZE];
 	struct strp_msg *rxm = strp_msg(skb);
 	size_t cipher_overhead;
@@ -1882,17 +1888,17 @@ static int tls_read_size(struct strparser *strp, struct sk_buff *skb)
 	int ret;
 
 	/* Verify that we have a full TLS header, or wait for more data */
-	if (rxm->offset + tls_ctx->rx.prepend_size > skb->len)
+	if (rxm->offset + prot->prepend_size > skb->len)
 		return 0;
 
 	/* Sanity-check size of on-stack buffer. */
-	if (WARN_ON(tls_ctx->rx.prepend_size > sizeof(header))) {
+	if (WARN_ON(prot->prepend_size > sizeof(header))) {
 		ret = -EINVAL;
 		goto read_failure;
 	}
 
 	/* Linearize header to local buffer */
-	ret = skb_copy_bits(skb, rxm->offset, header, tls_ctx->rx.prepend_size);
+	ret = skb_copy_bits(skb, rxm->offset, header, prot->prepend_size);
 
 	if (ret < 0)
 		goto read_failure;
@@ -1901,12 +1907,12 @@ static int tls_read_size(struct strparser *strp, struct sk_buff *skb)
 
 	data_len = ((header[4] & 0xFF) | (header[3] << 8));
 
-	cipher_overhead = tls_ctx->rx.tag_size;
-	if (tls_ctx->crypto_recv.info.version != TLS_1_3_VERSION)
-		cipher_overhead += tls_ctx->rx.iv_size;
+	cipher_overhead = prot->tag_size;
+	if (prot->version != TLS_1_3_VERSION)
+		cipher_overhead += prot->iv_size;
 
 	if (data_len > TLS_MAX_PAYLOAD_SIZE + cipher_overhead +
-	    tls_ctx->rx.tail_size) {
+	    prot->tail_size) {
 		ret = -EMSGSIZE;
 		goto read_failure;
 	}
@@ -2066,6 +2072,8 @@ static void tx_work_handler(struct work_struct *work)
 
 int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
 {
+	struct tls_context *tls_ctx = tls_get_ctx(sk);
+	struct tls_prot_info *prot = &tls_ctx->prot_info;
 	struct tls_crypto_info *crypto_info;
 	struct tls12_crypto_info_aes_gcm_128 *gcm_128_info;
 	struct tls12_crypto_info_aes_gcm_256 *gcm_256_info;
@@ -2171,18 +2179,20 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
 
 	if (crypto_info->version == TLS_1_3_VERSION) {
 		nonce_size = 0;
-		cctx->aad_size = TLS_HEADER_SIZE;
-		cctx->tail_size = 1;
+		prot->aad_size = TLS_HEADER_SIZE;
+		prot->tail_size = 1;
 	} else {
-		cctx->aad_size = TLS_AAD_SPACE_SIZE;
-		cctx->tail_size = 0;
+		prot->aad_size = TLS_AAD_SPACE_SIZE;
+		prot->tail_size = 0;
 	}
 
-	cctx->prepend_size = TLS_HEADER_SIZE + nonce_size;
-	cctx->tag_size = tag_size;
-	cctx->overhead_size = cctx->prepend_size + cctx->tag_size +
-		cctx->tail_size;
-	cctx->iv_size = iv_size;
+	prot->version = crypto_info->version;
+	prot->cipher_type = crypto_info->cipher_type;
+	prot->prepend_size = TLS_HEADER_SIZE + nonce_size;
+	prot->tag_size = tag_size;
+	prot->overhead_size = prot->prepend_size +
+			      prot->tag_size + prot->tail_size;
+	prot->iv_size = iv_size;
 	cctx->iv = kmalloc(iv_size + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
 			   GFP_KERNEL);
 	if (!cctx->iv) {
@@ -2192,7 +2202,7 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
 	/* Note: 128 & 256 bit salt are the same size */
 	memcpy(cctx->iv, salt, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
 	memcpy(cctx->iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv, iv_size);
-	cctx->rec_seq_size = rec_seq_size;
+	prot->rec_seq_size = rec_seq_size;
 	cctx->rec_seq = kmemdup(rec_seq, rec_seq_size, GFP_KERNEL);
 	if (!cctx->rec_seq) {
 		rc = -ENOMEM;
@@ -2215,7 +2225,7 @@ int tls_set_sw_offload(struct sock *sk, struct tls_context *ctx, int tx)
 	if (rc)
 		goto free_aead;
 
-	rc = crypto_aead_setauthsize(*aead, cctx->tag_size);
+	rc = crypto_aead_setauthsize(*aead, prot->tag_size);
 	if (rc)
 		goto free_aead;
 
-- 
2.13.6


^ permalink raw reply related	[flat|nested] 3+ messages in thread