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authorGabriel Oginski <gabrielx.oginski@intel.com>2021-11-04 07:23:08 +0000
committerMatthew Smith <mgsmith@netgate.com>2022-01-20 14:32:27 +0000
commit8ca08496a43e8d98fe2d4130d760c6fb600d0a93 (patch)
tree761328c3f8b6db1a41bdf72acba96bbb68a01dfd /src/plugins/wireguard/wireguard_noise.h
parent0e4e5a8222089d6e8f70ad74afcfd4e2854a00da (diff)
wireguard: add burst mode
Originally wireguard does packet by packet encryption and decryption. This patch adds burst mode for encryption and decryption packets. In addition, it contains some performance improvement such as prefetching packet header and reducing the number of current time function calls. Type: improvement Signed-off-by: Gabriel Oginski <gabrielx.oginski@intel.com> Change-Id: I04c7daa9b6dc56cd15c789661a64ec642b35aa3f
Diffstat (limited to 'src/plugins/wireguard/wireguard_noise.h')
-rw-r--r--src/plugins/wireguard/wireguard_noise.h76
1 files changed, 72 insertions, 4 deletions
diff --git a/src/plugins/wireguard/wireguard_noise.h b/src/plugins/wireguard/wireguard_noise.h
index 5b5a88fa250..ef1e7dcbfca 100644
--- a/src/plugins/wireguard/wireguard_noise.h
+++ b/src/plugins/wireguard/wireguard_noise.h
@@ -187,12 +187,80 @@ noise_remote_encrypt (vlib_main_t * vm, noise_remote_t *,
uint32_t * r_idx,
uint64_t * nonce,
uint8_t * src, size_t srclen, uint8_t * dst);
+
enum noise_state_crypt
-noise_remote_decrypt (vlib_main_t * vm, noise_remote_t *,
- uint32_t r_idx,
- uint64_t nonce,
- uint8_t * src, size_t srclen, uint8_t * dst);
+noise_sync_remote_encrypt (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
+ noise_remote_t *r, uint32_t *r_idx, uint64_t *nonce,
+ uint8_t *src, size_t srclen, uint8_t *dst, u32 bi,
+ u8 *iv, f64 time);
+
+enum noise_state_crypt
+noise_sync_remote_decrypt (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
+ noise_remote_t *, uint32_t r_idx, uint64_t nonce,
+ uint8_t *src, size_t srclen, uint8_t *dst, u32 bi,
+ u8 *iv, f64 time);
+
+static_always_inline noise_keypair_t *
+wg_get_active_keypair (noise_remote_t *r, uint32_t r_idx)
+{
+ if (r->r_current != NULL && r->r_current->kp_local_index == r_idx)
+ {
+ return r->r_current;
+ }
+ else if (r->r_previous != NULL && r->r_previous->kp_local_index == r_idx)
+ {
+ return r->r_previous;
+ }
+ else if (r->r_next != NULL && r->r_next->kp_local_index == r_idx)
+ {
+ return r->r_next;
+ }
+ else
+ {
+ return NULL;
+ }
+}
+
+inline bool
+noise_counter_recv (noise_counter_t *ctr, uint64_t recv)
+{
+ uint64_t i, top, index_recv, index_ctr;
+ unsigned long bit;
+ bool ret = false;
+ /* Check that the recv counter is valid */
+ if (ctr->c_recv >= REJECT_AFTER_MESSAGES || recv >= REJECT_AFTER_MESSAGES)
+ goto error;
+
+ /* If the packet is out of the window, invalid */
+ if (recv + COUNTER_WINDOW_SIZE < ctr->c_recv)
+ goto error;
+
+ /* If the new counter is ahead of the current counter, we'll need to
+ * zero out the bitmap that has previously been used */
+ index_recv = recv / COUNTER_BITS;
+ index_ctr = ctr->c_recv / COUNTER_BITS;
+
+ if (recv > ctr->c_recv)
+ {
+ top = clib_min (index_recv - index_ctr, COUNTER_NUM);
+ for (i = 1; i <= top; i++)
+ ctr->c_backtrack[(i + index_ctr) & (COUNTER_NUM - 1)] = 0;
+ ctr->c_recv = recv;
+ }
+
+ index_recv %= COUNTER_NUM;
+ bit = 1ul << (recv % COUNTER_BITS);
+
+ if (ctr->c_backtrack[index_recv] & bit)
+ goto error;
+
+ ctr->c_backtrack[index_recv] |= bit;
+
+ ret = true;
+error:
+ return ret;
+}
#endif /* __included_wg_noise_h__ */