}) ip6_and_esp_header_t;
/* *INDENT-ON* */
-#define ESP_WINDOW_SIZE (64)
-#define ESP_SEQ_MAX (4294967295UL)
+#define ESP_SEQ_MAX (4294967295UL)
+#define ESP_MAX_BLOCK_SIZE (16)
+#define ESP_MAX_ICV_SIZE (16)
u8 *format_esp_header (u8 * s, va_list * args);
-always_inline int
-esp_replay_check (ipsec_sa_t * sa, u32 seq)
-{
- u32 diff;
-
- if (PREDICT_TRUE (seq > sa->last_seq))
- return 0;
-
- diff = sa->last_seq - seq;
-
- if (ESP_WINDOW_SIZE > diff)
- return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
- else
- return 1;
-
- return 0;
-}
-
-always_inline int
-esp_replay_check_esn (ipsec_sa_t * sa, u32 seq)
-{
- u32 tl = sa->last_seq;
- u32 th = sa->last_seq_hi;
- u32 diff = tl - seq;
-
- if (PREDICT_TRUE (tl >= (ESP_WINDOW_SIZE - 1)))
- {
- if (seq >= (tl - ESP_WINDOW_SIZE + 1))
- {
- sa->seq_hi = th;
- if (seq <= tl)
- return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
- else
- return 0;
- }
- else
- {
- sa->seq_hi = th + 1;
- return 0;
- }
- }
- else
- {
- if (seq >= (tl - ESP_WINDOW_SIZE + 1))
- {
- sa->seq_hi = th - 1;
- return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
- }
- else
- {
- sa->seq_hi = th;
- if (seq <= tl)
- return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
- else
- return 0;
- }
- }
-
- return 0;
-}
-
/* TODO seq increment should be atomic to be accessed by multiple workers */
-always_inline void
-esp_replay_advance (ipsec_sa_t * sa, u32 seq)
-{
- u32 pos;
-
- if (seq > sa->last_seq)
- {
- pos = seq - sa->last_seq;
- if (pos < ESP_WINDOW_SIZE)
- sa->replay_window = ((sa->replay_window) << pos) | 1;
- else
- sa->replay_window = 1;
- sa->last_seq = seq;
- }
- else
- {
- pos = sa->last_seq - seq;
- sa->replay_window |= (1ULL << pos);
- }
-}
-
-always_inline void
-esp_replay_advance_esn (ipsec_sa_t * sa, u32 seq)
-{
- int wrap = sa->seq_hi - sa->last_seq_hi;
- u32 pos;
-
- if (wrap == 0 && seq > sa->last_seq)
- {
- pos = seq - sa->last_seq;
- if (pos < ESP_WINDOW_SIZE)
- sa->replay_window = ((sa->replay_window) << pos) | 1;
- else
- sa->replay_window = 1;
- sa->last_seq = seq;
- }
- else if (wrap > 0)
- {
- pos = ~seq + sa->last_seq + 1;
- if (pos < ESP_WINDOW_SIZE)
- sa->replay_window = ((sa->replay_window) << pos) | 1;
- else
- sa->replay_window = 1;
- sa->last_seq = seq;
- sa->last_seq_hi = sa->seq_hi;
- }
- else if (wrap < 0)
- {
- pos = ~seq + sa->last_seq + 1;
- sa->replay_window |= (1ULL << pos);
- }
- else
- {
- pos = sa->last_seq - seq;
- sa->replay_window |= (1ULL << pos);
- }
-}
-
always_inline int
esp_seq_advance (ipsec_sa_t * sa)
{
- if (PREDICT_TRUE (sa->use_esn))
+ if (PREDICT_TRUE (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa)))
{
if (PREDICT_FALSE (sa->seq == ESP_SEQ_MAX))
{
- if (PREDICT_FALSE
- (sa->use_anti_replay && sa->seq_hi == ESP_SEQ_MAX))
+ if (PREDICT_FALSE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa) &&
+ sa->seq_hi == ESP_SEQ_MAX))
return 1;
sa->seq_hi++;
}
}
else
{
- if (PREDICT_FALSE (sa->use_anti_replay && sa->seq == ESP_SEQ_MAX))
+ if (PREDICT_FALSE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa) &&
+ sa->seq == ESP_SEQ_MAX))
return 1;
sa->seq++;
}
op->len = data_len;
op->dst = signature;
op->hmac_trunc_len = sa->integ_trunc_size;
-#if 0
- HMAC_Init_ex (ctx, key, key_len, md, NULL);
-
- HMAC_Update (ctx, data, data_len);
+ if (ipsec_sa_is_set_USE_EXTENDED_SEQ_NUM (sa))
+ {
+ u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
- if (PREDICT_TRUE (use_esn))
- HMAC_Update (ctx, (u8 *) & seq_hi, sizeof (seq_hi));
- HMAC_Final (ctx, signature, &len);
+ op->len += 4;
+ clib_memcpy (data + data_len, &seq_hi, 4);
+ }
-#endif
vnet_crypto_process_ops (vm, op, 1);
return sa->integ_trunc_size;
}