#include <vnet/vnet.h>
#include <vnet/api_errno.h>
#include <vnet/ip/ip.h>
+#include <vnet/l2/l2_input.h>
#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/esp.h>
#include <vnet/ipsec/ipsec_io.h>
+#include <vnet/ipsec/ipsec_tun.h>
-#define foreach_esp_decrypt_next \
-_(DROP, "error-drop") \
-_(IP4_INPUT, "ip4-input-no-checksum") \
-_(IP6_INPUT, "ip6-input") \
-_(IPSEC_GRE_INPUT, "ipsec-gre-input")
+#include <vnet/gre/packet.h>
+
+#define foreach_esp_decrypt_next \
+ _ (DROP, "error-drop") \
+ _ (IP4_INPUT, "ip4-input-no-checksum") \
+ _ (IP6_INPUT, "ip6-input") \
+ _ (L2_INPUT, "l2-input") \
+ _ (MPLS_INPUT, "mpls-input") \
+ _ (HANDOFF, "handoff")
#define _(v, s) ESP_DECRYPT_NEXT_##v,
typedef enum
ESP_DECRYPT_N_NEXT,
} esp_decrypt_next_t;
+#define foreach_esp_decrypt_post_next \
+ _ (DROP, "error-drop") \
+ _ (IP4_INPUT, "ip4-input-no-checksum") \
+ _ (IP6_INPUT, "ip6-input") \
+ _ (MPLS_INPUT, "mpls-input") \
+ _ (L2_INPUT, "l2-input")
-#define foreach_esp_decrypt_error \
- _(RX_PKTS, "ESP pkts received") \
- _(DECRYPTION_FAILED, "ESP decryption failed") \
- _(INTEG_ERROR, "Integrity check failed") \
- _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
- _(REPLAY, "SA replayed packet") \
- _(CHAINED_BUFFER, "chained buffers (packet dropped)") \
- _(OVERSIZED_HEADER, "buffer with oversized header (dropped)") \
- _(NO_TAIL_SPACE, "no enough buffer tail space (dropped)")
-
+#define _(v, s) ESP_DECRYPT_POST_NEXT_##v,
+typedef enum
+{
+ foreach_esp_decrypt_post_next
+#undef _
+ ESP_DECRYPT_POST_N_NEXT,
+} esp_decrypt_post_next_t;
+
+#define foreach_esp_decrypt_error \
+ _ (RX_PKTS, "ESP pkts received") \
+ _ (RX_POST_PKTS, "ESP-POST pkts received") \
+ _ (HANDOFF, "hand-off") \
+ _ (DECRYPTION_FAILED, "ESP decryption failed") \
+ _ (INTEG_ERROR, "Integrity check failed") \
+ _ (CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
+ _ (REPLAY, "SA replayed packet") \
+ _ (RUNT, "undersized packet") \
+ _ (NO_BUFFERS, "no buffers (packet dropped)") \
+ _ (OVERSIZED_HEADER, "buffer with oversized header (dropped)") \
+ _ (NO_TAIL_SPACE, "no enough buffer tail space (dropped)") \
+ _ (TUN_NO_PROTO, "no tunnel protocol") \
+ _ (UNSUP_PAYLOAD, "unsupported payload")
typedef enum
{
typedef struct
{
u32 seq;
+ u32 sa_seq;
+ u32 sa_seq_hi;
ipsec_crypto_alg_t crypto_alg;
ipsec_integ_alg_t integ_alg;
} esp_decrypt_trace_t;
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
esp_decrypt_trace_t *t = va_arg (*args, esp_decrypt_trace_t *);
- s = format (s, "esp: crypto %U integrity %U seq %u",
- format_ipsec_crypto_alg, t->crypto_alg,
- format_ipsec_integ_alg, t->integ_alg, t->seq);
+ s =
+ format (s,
+ "esp: crypto %U integrity %U pkt-seq %d sa-seq %u sa-seq-hi %u",
+ format_ipsec_crypto_alg, t->crypto_alg, format_ipsec_integ_alg,
+ t->integ_alg, t->seq, t->sa_seq, t->sa_seq_hi);
return s;
}
-typedef struct
+#define ESP_ENCRYPT_PD_F_FD_TRANSPORT (1 << 2)
+
+static_always_inline void
+esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts,
+ int e)
{
- union
- {
- struct
+ vnet_crypto_op_t *op = ops;
+ u32 n_fail, n_ops = vec_len (ops);
+
+ if (n_ops == 0)
+ return;
+
+ n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
+
+ while (n_fail)
{
- u8 icv_sz;
- u8 iv_sz;
- ipsec_sa_flags_t flags:8;
- u32 sa_index;
- };
- u64 sa_data;
- };
+ ASSERT (op - ops < n_ops);
+ if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
+ {
+ u32 err, bi = op->user_data;
+ if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
+ err = e;
+ else
+ err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
+ b[bi]->error = node->errors[err];
+ nexts[bi] = ESP_DECRYPT_NEXT_DROP;
+ n_fail--;
+ }
+ op++;
+ }
+}
- i16 current_data;
- i16 current_length;
- u16 hdr_sz;
-} esp_decrypt_packet_data_t;
+static_always_inline void
+esp_process_chained_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vnet_crypto_op_t * ops, vlib_buffer_t * b[],
+ u16 * nexts, vnet_crypto_op_chunk_t * chunks, int e)
+{
-STATIC_ASSERT_SIZEOF (esp_decrypt_packet_data_t, 2 * sizeof (u64));
+ vnet_crypto_op_t *op = ops;
+ u32 n_fail, n_ops = vec_len (ops);
-#define ESP_ENCRYPT_PD_F_FD_TRANSPORT (1 << 2)
+ if (PREDICT_TRUE (n_ops == 0))
+ return;
+
+ n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
+
+ while (n_fail)
+ {
+ ASSERT (op - ops < n_ops);
+ if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
+ {
+ u32 err, bi = op->user_data;
+ if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
+ err = e;
+ else
+ err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
+ b[bi]->error = node->errors[err];
+ nexts[bi] = ESP_DECRYPT_NEXT_DROP;
+ n_fail--;
+ }
+ op++;
+ }
+}
+
+always_inline void
+esp_remove_tail (vlib_main_t * vm, vlib_buffer_t * b, vlib_buffer_t * last,
+ u16 tail)
+{
+ vlib_buffer_t *before_last = b;
+
+ if (last->current_length > tail)
+ {
+ last->current_length -= tail;
+ return;
+ }
+ ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
+
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ before_last = b;
+ b = vlib_get_buffer (vm, b->next_buffer);
+ }
+ before_last->current_length -= tail - last->current_length;
+ vlib_buffer_free_one (vm, before_last->next_buffer);
+ before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
+}
+
+/* ICV is splitted in last two buffers so move it to the last buffer and
+ return pointer to it */
+static_always_inline u8 *
+esp_move_icv (vlib_main_t * vm, vlib_buffer_t * first,
+ esp_decrypt_packet_data_t * pd,
+ esp_decrypt_packet_data2_t * pd2, u16 icv_sz, u16 * dif)
+{
+ vlib_buffer_t *before_last, *bp;
+ u16 last_sz = pd2->lb->current_length;
+ u16 first_sz = icv_sz - last_sz;
+
+ bp = before_last = first;
+ while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ before_last = bp;
+ bp = vlib_get_buffer (vm, bp->next_buffer);
+ }
+
+ u8 *lb_curr = vlib_buffer_get_current (pd2->lb);
+ memmove (lb_curr + first_sz, lb_curr, last_sz);
+ clib_memcpy_fast (lb_curr, vlib_buffer_get_tail (before_last) - first_sz,
+ first_sz);
+ before_last->current_length -= first_sz;
+ if (before_last == first)
+ pd->current_length -= first_sz;
+ clib_memset (vlib_buffer_get_tail (before_last), 0, first_sz);
+ if (dif)
+ dif[0] = first_sz;
+ pd2->lb = before_last;
+ pd2->icv_removed = 1;
+ pd2->free_buffer_index = before_last->next_buffer;
+ before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
+ return lb_curr;
+}
+
+static_always_inline i16
+esp_insert_esn (vlib_main_t * vm, ipsec_sa_t * sa,
+ esp_decrypt_packet_data2_t * pd2, u32 * data_len,
+ u8 ** digest, u16 * len, vlib_buffer_t * b, u8 * payload)
+{
+ if (!ipsec_sa_is_set_USE_ESN (sa))
+ return 0;
+
+ /* shift ICV by 4 bytes to insert ESN */
+ u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
+ u8 tmp[ESP_MAX_ICV_SIZE], sz = sizeof (sa->seq_hi);
+
+ if (pd2->icv_removed)
+ {
+ u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
+ if (space_left >= sz)
+ {
+ clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi, sz);
+ *data_len += sz;
+ }
+ else
+ return sz;
+
+ len[0] = b->current_length;
+ }
+ else
+ {
+ clib_memcpy_fast (tmp, payload + len[0], ESP_MAX_ICV_SIZE);
+ clib_memcpy_fast (payload + len[0], &seq_hi, sz);
+ clib_memcpy_fast (payload + len[0] + sz, tmp, ESP_MAX_ICV_SIZE);
+ *data_len += sz;
+ *digest += sz;
+ }
+ return sz;
+}
+
+static_always_inline u8 *
+esp_move_icv_esn (vlib_main_t * vm, vlib_buffer_t * first,
+ esp_decrypt_packet_data_t * pd,
+ esp_decrypt_packet_data2_t * pd2, u16 icv_sz,
+ ipsec_sa_t * sa, u8 * extra_esn, u32 * len)
+{
+ u16 dif = 0;
+ u8 *digest = esp_move_icv (vm, first, pd, pd2, icv_sz, &dif);
+ if (dif)
+ *len -= dif;
+
+ if (ipsec_sa_is_set_USE_ESN (sa))
+ {
+ u8 sz = sizeof (sa->seq_hi);
+ u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
+ u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
+
+ if (space_left >= sz)
+ {
+ clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi, sz);
+ *len += sz;
+ }
+ else
+ {
+ /* no space for ESN at the tail, use the next buffer
+ * (with ICV data) */
+ ASSERT (pd2->icv_removed);
+ vlib_buffer_t *tmp = vlib_get_buffer (vm, pd2->free_buffer_index);
+ clib_memcpy_fast (vlib_buffer_get_current (tmp) - sz, &seq_hi, sz);
+ extra_esn[0] = 1;
+ }
+ }
+ return digest;
+}
+
+static_always_inline int
+esp_decrypt_chain_integ (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
+ esp_decrypt_packet_data2_t * pd2,
+ ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
+ u8 * start_src, u32 start_len,
+ u8 ** digest, u16 * n_ch, u32 * integ_total_len)
+{
+ vnet_crypto_op_chunk_t *ch;
+ vlib_buffer_t *cb = vlib_get_buffer (vm, b->next_buffer);
+ u16 n_chunks = 1;
+ u32 total_len;
+ vec_add2 (ptd->chunks, ch, 1);
+ total_len = ch->len = start_len;
+ ch->src = start_src;
+
+ while (1)
+ {
+ vec_add2 (ptd->chunks, ch, 1);
+ n_chunks += 1;
+ ch->src = vlib_buffer_get_current (cb);
+ if (pd2->lb == cb)
+ {
+ if (pd2->icv_removed)
+ ch->len = cb->current_length;
+ else
+ ch->len = cb->current_length - icv_sz;
+ if (ipsec_sa_is_set_USE_ESN (sa0))
+ {
+ u32 seq_hi = clib_host_to_net_u32 (sa0->seq_hi);
+ u8 tmp[ESP_MAX_ICV_SIZE], sz = sizeof (sa0->seq_hi);
+ u8 *esn;
+ vlib_buffer_t *tmp_b;
+ u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
+ if (space_left < sz)
+ {
+ if (pd2->icv_removed)
+ {
+ /* use pre-data area from the last bufer
+ that was removed from the chain */
+ tmp_b = vlib_get_buffer (vm, pd2->free_buffer_index);
+ esn = tmp_b->data - sz;
+ }
+ else
+ {
+ /* no space, need to allocate new buffer */
+ u32 tmp_bi = 0;
+ if (vlib_buffer_alloc (vm, &tmp_bi, 1) != 1)
+ return -1;
+ tmp_b = vlib_get_buffer (vm, tmp_bi);
+ esn = tmp_b->data;
+ pd2->free_buffer_index = tmp_bi;
+ }
+ clib_memcpy_fast (esn, &seq_hi, sz);
+
+ vec_add2 (ptd->chunks, ch, 1);
+ n_chunks += 1;
+ ch->src = esn;
+ ch->len = sz;
+ }
+ else
+ {
+ if (pd2->icv_removed)
+ {
+ clib_memcpy_fast (vlib_buffer_get_tail
+ (pd2->lb), &seq_hi, sz);
+ }
+ else
+ {
+ clib_memcpy_fast (tmp, *digest, ESP_MAX_ICV_SIZE);
+ clib_memcpy_fast (*digest, &seq_hi, sz);
+ clib_memcpy_fast (*digest + sz, tmp, ESP_MAX_ICV_SIZE);
+ *digest += sz;
+ }
+ ch->len += sz;
+ }
+ }
+ total_len += ch->len;
+ break;
+ }
+ else
+ total_len += ch->len = cb->current_length;
+
+ if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
+ break;
+
+ cb = vlib_get_buffer (vm, cb->next_buffer);
+ }
+
+ if (n_ch)
+ *n_ch = n_chunks;
+ if (integ_total_len)
+ *integ_total_len = total_len;
+
+ return 0;
+}
+
+static_always_inline u32
+esp_decrypt_chain_crypto (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
+ esp_decrypt_packet_data_t * pd,
+ esp_decrypt_packet_data2_t * pd2,
+ ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
+ u8 * start, u32 start_len, u8 ** tag, u16 * n_ch)
+{
+ vnet_crypto_op_chunk_t *ch;
+ vlib_buffer_t *cb = b;
+ u16 n_chunks = 1;
+ u32 total_len;
+ vec_add2 (ptd->chunks, ch, 1);
+ total_len = ch->len = start_len;
+ ch->src = ch->dst = start;
+ cb = vlib_get_buffer (vm, cb->next_buffer);
+ n_chunks = 1;
+
+ while (1)
+ {
+ vec_add2 (ptd->chunks, ch, 1);
+ n_chunks += 1;
+ ch->src = ch->dst = vlib_buffer_get_current (cb);
+ if (pd2->lb == cb)
+ {
+ if (ipsec_sa_is_set_IS_AEAD (sa0))
+ {
+ if (pd2->lb->current_length < icv_sz)
+ {
+ u16 dif = 0;
+ *tag = esp_move_icv (vm, b, pd, pd2, icv_sz, &dif);
+
+ /* this chunk does not contain crypto data */
+ n_chunks -= 1;
+ /* and fix previous chunk's length as it might have
+ been changed */
+ ASSERT (n_chunks > 0);
+ if (pd2->lb == b)
+ {
+ total_len -= dif;
+ ch[-1].len -= dif;
+ }
+ else
+ {
+ total_len = total_len + pd2->lb->current_length -
+ ch[-1].len;
+ ch[-1].len = pd2->lb->current_length;
+ }
+ break;
+ }
+ else
+ *tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
+ }
+
+ if (pd2->icv_removed)
+ total_len += ch->len = cb->current_length;
+ else
+ total_len += ch->len = cb->current_length - icv_sz;
+ }
+ else
+ total_len += ch->len = cb->current_length;
+
+ if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
+ break;
+
+ cb = vlib_get_buffer (vm, cb->next_buffer);
+ }
+
+ if (n_ch)
+ *n_ch = n_chunks;
+
+ return total_len;
+}
+
+static_always_inline void
+esp_decrypt_prepare_sync_op (vlib_main_t * vm, vlib_node_runtime_t * node,
+ ipsec_per_thread_data_t * ptd,
+ vnet_crypto_op_t *** crypto_ops,
+ vnet_crypto_op_t *** integ_ops,
+ vnet_crypto_op_t * op,
+ ipsec_sa_t * sa0, u8 * payload,
+ u16 len, u8 icv_sz, u8 iv_sz,
+ esp_decrypt_packet_data_t * pd,
+ esp_decrypt_packet_data2_t * pd2,
+ vlib_buffer_t * b, u16 * next, u32 index)
+{
+ const u8 esp_sz = sizeof (esp_header_t);
+
+ if (PREDICT_TRUE (sa0->integ_op_id != VNET_CRYPTO_OP_NONE))
+ {
+ vnet_crypto_op_init (op, sa0->integ_op_id);
+ op->key_index = sa0->integ_key_index;
+ op->src = payload;
+ op->flags = VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
+ op->user_data = index;
+ op->digest = payload + len;
+ op->digest_len = icv_sz;
+ op->len = len;
+
+ if (pd->is_chain)
+ {
+ /* buffer is chained */
+ op->len = pd->current_length;
+
+ /* special case when ICV is splitted and needs to be reassembled
+ * first -> move it to the last buffer. Also take into account
+ * that ESN needs to be added after encrypted data and may or
+ * may not fit in the tail.*/
+ if (pd2->lb->current_length < icv_sz)
+ {
+ u8 extra_esn = 0;
+ op->digest =
+ esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
+ &extra_esn, &op->len);
+
+ if (extra_esn)
+ {
+ /* esn is in the last buffer, that was unlinked from
+ * the chain */
+ op->len = b->current_length;
+ }
+ else
+ {
+ if (pd2->lb == b)
+ {
+ /* we now have a single buffer of crypto data, adjust
+ * the length (second buffer contains only ICV) */
+ *integ_ops = &ptd->integ_ops;
+ *crypto_ops = &ptd->crypto_ops;
+ len = b->current_length;
+ goto out;
+ }
+ }
+ }
+ else
+ op->digest = vlib_buffer_get_tail (pd2->lb) - icv_sz;
+
+ op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
+ op->chunk_index = vec_len (ptd->chunks);
+ if (esp_decrypt_chain_integ (vm, ptd, pd2, sa0, b, icv_sz,
+ payload, pd->current_length,
+ &op->digest, &op->n_chunks, 0) < 0)
+ {
+ b->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ return;
+ }
+ }
+ else
+ esp_insert_esn (vm, sa0, pd2, &op->len, &op->digest, &len, b,
+ payload);
+ out:
+ vec_add_aligned (*(integ_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
+ }
+
+ payload += esp_sz;
+ len -= esp_sz;
+
+ if (sa0->crypto_dec_op_id != VNET_CRYPTO_OP_NONE)
+ {
+ vnet_crypto_op_init (op, sa0->crypto_dec_op_id);
+ op->key_index = sa0->crypto_key_index;
+ op->iv = payload;
+
+ if (ipsec_sa_is_set_IS_CTR (sa0))
+ {
+ /* construct nonce in a scratch space in front of the IP header */
+ esp_ctr_nonce_t *nonce =
+ (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz -
+ sizeof (*nonce));
+ if (ipsec_sa_is_set_IS_AEAD (sa0))
+ {
+ /* constuct aad in a scratch space in front of the nonce */
+ esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
+ op->aad = (u8 *) nonce - sizeof (esp_aead_t);
+ op->aad_len = esp_aad_fill (op->aad, esp0, sa0);
+ op->tag = payload + len;
+ op->tag_len = 16;
+ }
+ else
+ {
+ nonce->ctr = clib_host_to_net_u32 (1);
+ }
+ nonce->salt = sa0->salt;
+ ASSERT (sizeof (u64) == iv_sz);
+ nonce->iv = *(u64 *) op->iv;
+ op->iv = (u8 *) nonce;
+ }
+ op->src = op->dst = payload += iv_sz;
+ op->len = len - iv_sz;
+ op->user_data = index;
+
+ if (pd->is_chain && (pd2->lb != b))
+ {
+ /* buffer is chained */
+ op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
+ op->chunk_index = vec_len (ptd->chunks);
+ esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
+ payload, len - pd->iv_sz + pd->icv_sz,
+ &op->tag, &op->n_chunks);
+ }
+
+ vec_add_aligned (*(crypto_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
+ }
+}
+
+static_always_inline esp_decrypt_error_t
+esp_decrypt_prepare_async_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ ipsec_per_thread_data_t *ptd,
+ vnet_crypto_async_frame_t *f, ipsec_sa_t *sa0,
+ u8 *payload, u16 len, u8 icv_sz, u8 iv_sz,
+ esp_decrypt_packet_data_t *pd,
+ esp_decrypt_packet_data2_t *pd2, u32 bi,
+ vlib_buffer_t *b, u16 *next, u16 async_next)
+{
+ const u8 esp_sz = sizeof (esp_header_t);
+ u32 current_protect_index = vnet_buffer (b)->ipsec.protect_index;
+ esp_decrypt_packet_data_t *async_pd = &(esp_post_data (b))->decrypt_data;
+ esp_decrypt_packet_data2_t *async_pd2 = esp_post_data2 (b);
+ u8 *tag = payload + len, *iv = payload + esp_sz, *aad = 0;
+ u32 key_index;
+ u32 crypto_len, integ_len = 0;
+ i16 crypto_start_offset, integ_start_offset = 0;
+ u8 flags = 0;
+
+ if (!ipsec_sa_is_set_IS_AEAD (sa0))
+ {
+ /* linked algs */
+ key_index = sa0->linked_key_index;
+ integ_start_offset = payload - b->data;
+ integ_len = len;
+
+ if (pd->is_chain)
+ {
+ /* buffer is chained */
+ integ_len = pd->current_length;
+
+ /* special case when ICV is splitted and needs to be reassembled
+ * first -> move it to the last buffer. Also take into account
+ * that ESN needs to be added after encrypted data and may or
+ * may not fit in the tail.*/
+ if (pd2->lb->current_length < icv_sz)
+ {
+ u8 extra_esn = 0;
+ tag = esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
+ &extra_esn, &integ_len);
+
+ if (extra_esn)
+ {
+ /* esn is in the last buffer, that was unlinked from
+ * the chain */
+ integ_len = b->current_length;
+ }
+ else
+ {
+ if (pd2->lb == b)
+ {
+ /* we now have a single buffer of crypto data, adjust
+ * the length (second buffer contains only ICV) */
+ len = b->current_length;
+ goto out;
+ }
+ }
+ }
+ else
+ tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
+
+ flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
+ if (esp_decrypt_chain_integ (vm, ptd, pd2, sa0, b, icv_sz, payload,
+ pd->current_length, &tag,
+ 0, &integ_len) < 0)
+ {
+ /* allocate buffer failed, will not add to frame and drop */
+ return (ESP_DECRYPT_ERROR_NO_BUFFERS);
+ }
+ }
+ else
+ esp_insert_esn (vm, sa0, pd2, &integ_len, &tag, &len, b, payload);
+ }
+ else
+ key_index = sa0->crypto_key_index;
+
+out:
+ /* crypto */
+ payload += esp_sz;
+ len -= esp_sz;
+ iv = payload;
+
+ if (ipsec_sa_is_set_IS_CTR (sa0))
+ {
+ /* construct nonce in a scratch space in front of the IP header */
+ esp_ctr_nonce_t *nonce =
+ (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz - sizeof (*nonce));
+ if (ipsec_sa_is_set_IS_AEAD (sa0))
+ {
+ /* constuct aad in a scratch space in front of the nonce */
+ esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
+ aad = (u8 *) nonce - sizeof (esp_aead_t);
+ esp_aad_fill (aad, esp0, sa0);
+ tag = payload + len;
+ }
+ else
+ {
+ nonce->ctr = clib_host_to_net_u32 (1);
+ }
+ nonce->salt = sa0->salt;
+ ASSERT (sizeof (u64) == iv_sz);
+ nonce->iv = *(u64 *) iv;
+ iv = (u8 *) nonce;
+ }
+
+ crypto_start_offset = (payload += iv_sz) - b->data;
+ crypto_len = len - iv_sz;
+
+ if (pd->is_chain && (pd2->lb != b))
+ {
+ /* buffer is chained */
+ flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
+
+ crypto_len = esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
+ payload,
+ len - pd->iv_sz + pd->icv_sz,
+ &tag, 0);
+ }
+
+ *async_pd = *pd;
+ *async_pd2 = *pd2;
+ pd->protect_index = current_protect_index;
+
+ /* for AEAD integ_len - crypto_len will be negative, it is ok since it
+ * is ignored by the engine. */
+ vnet_crypto_async_add_to_frame (
+ vm, f, key_index, crypto_len, integ_len - crypto_len, crypto_start_offset,
+ integ_start_offset, bi, async_next, iv, tag, aad, flags);
+
+ return (ESP_DECRYPT_ERROR_RX_PKTS);
+}
+
+static_always_inline void
+esp_decrypt_post_crypto (vlib_main_t * vm, vlib_node_runtime_t * node,
+ esp_decrypt_packet_data_t * pd,
+ esp_decrypt_packet_data2_t * pd2, vlib_buffer_t * b,
+ u16 * next, int is_ip6, int is_tun, int is_async)
+{
+ ipsec_sa_t *sa0 = ipsec_sa_get (pd->sa_index);
+ vlib_buffer_t *lb = b;
+ const u8 esp_sz = sizeof (esp_header_t);
+ const u8 tun_flags = IPSEC_SA_FLAG_IS_TUNNEL | IPSEC_SA_FLAG_IS_TUNNEL_V6;
+ u8 pad_length = 0, next_header = 0;
+ u16 icv_sz;
+
+ /*
+ * redo the anti-reply check
+ * in this frame say we have sequence numbers, s, s+1, s+1, s+1
+ * and s and s+1 are in the window. When we did the anti-replay
+ * check above we did so against the state of the window (W),
+ * after packet s-1. So each of the packets in the sequence will be
+ * accepted.
+ * This time s will be cheked against Ws-1, s+1 chceked against Ws
+ * (i.e. the window state is updated/advnaced)
+ * so this time the successive s+! packet will be dropped.
+ * This is a consequence of batching the decrypts. If the
+ * check-dcrypt-advance process was done for each packet it would
+ * be fine. But we batch the decrypts because it's much more efficient
+ * to do so in SW and if we offload to HW and the process is async.
+ *
+ * You're probably thinking, but this means an attacker can send the
+ * above sequence and cause VPP to perform decrpyts that will fail,
+ * and that's true. But if the attacker can determine s (a valid
+ * sequence number in the window) which is non-trivial, it can generate
+ * a sequence s, s+1, s+2, s+3, ... s+n and nothing will prevent any
+ * implementation, sequential or batching, from decrypting these.
+ */
+ if (ipsec_sa_anti_replay_check (sa0, pd->seq))
+ {
+ b->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ return;
+ }
+
+ ipsec_sa_anti_replay_advance (sa0, pd->seq);
+
+ if (pd->is_chain)
+ {
+ lb = pd2->lb;
+ icv_sz = pd2->icv_removed ? 0 : pd->icv_sz;
+ if (pd2->free_buffer_index)
+ {
+ vlib_buffer_free_one (vm, pd2->free_buffer_index);
+ lb->next_buffer = 0;
+ }
+ if (lb->current_length < sizeof (esp_footer_t) + icv_sz)
+ {
+ /* esp footer is either splitted in two buffers or in the before
+ * last buffer */
+
+ vlib_buffer_t *before_last = b, *bp = b;
+ while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ before_last = bp;
+ bp = vlib_get_buffer (vm, bp->next_buffer);
+ }
+ u8 *bt = vlib_buffer_get_tail (before_last);
+
+ if (lb->current_length == icv_sz)
+ {
+ esp_footer_t *f = (esp_footer_t *) (bt - sizeof (*f));
+ pad_length = f->pad_length;
+ next_header = f->next_header;
+ }
+ else
+ {
+ pad_length = (bt - 1)[0];
+ next_header = ((u8 *) vlib_buffer_get_current (lb))[0];
+ }
+ }
+ else
+ {
+ esp_footer_t *f =
+ (esp_footer_t *) (lb->data + lb->current_data +
+ lb->current_length - sizeof (esp_footer_t) -
+ icv_sz);
+ pad_length = f->pad_length;
+ next_header = f->next_header;
+ }
+ }
+ else
+ {
+ icv_sz = pd->icv_sz;
+ esp_footer_t *f =
+ (esp_footer_t *) (lb->data + lb->current_data + lb->current_length -
+ sizeof (esp_footer_t) - icv_sz);
+ pad_length = f->pad_length;
+ next_header = f->next_header;
+ }
+
+ u16 adv = pd->iv_sz + esp_sz;
+ u16 tail = sizeof (esp_footer_t) + pad_length + icv_sz;
+ u16 tail_orig = sizeof (esp_footer_t) + pad_length + pd->icv_sz;
+ b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ if ((pd->flags & tun_flags) == 0 && !is_tun) /* transport mode */
+ {
+ u8 udp_sz = (is_ip6 == 0 && pd->flags & IPSEC_SA_FLAG_UDP_ENCAP) ?
+ sizeof (udp_header_t) : 0;
+ u16 ip_hdr_sz = pd->hdr_sz - udp_sz;
+ u8 *old_ip = b->data + pd->current_data - ip_hdr_sz - udp_sz;
+ u8 *ip = old_ip + adv + udp_sz;
+
+ if (is_ip6 && ip_hdr_sz > 64)
+ memmove (ip, old_ip, ip_hdr_sz);
+ else
+ clib_memcpy_le64 (ip, old_ip, ip_hdr_sz);
+
+ b->current_data = pd->current_data + adv - ip_hdr_sz;
+ b->current_length += ip_hdr_sz - adv;
+ esp_remove_tail (vm, b, lb, tail);
+
+ if (is_ip6)
+ {
+ ip6_header_t *ip6 = (ip6_header_t *) ip;
+ u16 len = clib_net_to_host_u16 (ip6->payload_length);
+ len -= adv + tail_orig;
+ ip6->payload_length = clib_host_to_net_u16 (len);
+ ip6->protocol = next_header;
+ next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
+ }
+ else
+ {
+ ip4_header_t *ip4 = (ip4_header_t *) ip;
+ ip_csum_t sum = ip4->checksum;
+ u16 len = clib_net_to_host_u16 (ip4->length);
+ len = clib_host_to_net_u16 (len - adv - tail_orig - udp_sz);
+ sum = ip_csum_update (sum, ip4->protocol, next_header,
+ ip4_header_t, protocol);
+ sum = ip_csum_update (sum, ip4->length, len, ip4_header_t, length);
+ ip4->checksum = ip_csum_fold (sum);
+ ip4->protocol = next_header;
+ ip4->length = len;
+ next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
+ }
+ }
+ else
+ {
+ if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
+ {
+ next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
+ b->current_data = pd->current_data + adv;
+ b->current_length = pd->current_length - adv;
+ esp_remove_tail (vm, b, lb, tail);
+ }
+ else if (next_header == IP_PROTOCOL_IPV6)
+ {
+ next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
+ b->current_data = pd->current_data + adv;
+ b->current_length = pd->current_length - adv;
+ esp_remove_tail (vm, b, lb, tail);
+ }
+ else if (next_header == IP_PROTOCOL_MPLS_IN_IP)
+ {
+ next[0] = ESP_DECRYPT_NEXT_MPLS_INPUT;
+ b->current_data = pd->current_data + adv;
+ b->current_length = pd->current_length - adv;
+ esp_remove_tail (vm, b, lb, tail);
+ }
+ else
+ {
+ if (is_tun && next_header == IP_PROTOCOL_GRE)
+ {
+ gre_header_t *gre;
+
+ b->current_data = pd->current_data + adv;
+ b->current_length = pd->current_length - adv - tail;
+
+ gre = vlib_buffer_get_current (b);
+
+ vlib_buffer_advance (b, sizeof (*gre));
+
+ switch (clib_net_to_host_u16 (gre->protocol))
+ {
+ case GRE_PROTOCOL_teb:
+ vnet_update_l2_len (b);
+ next[0] = ESP_DECRYPT_NEXT_L2_INPUT;
+ break;
+ case GRE_PROTOCOL_ip4:
+ next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
+ break;
+ case GRE_PROTOCOL_ip6:
+ next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
+ break;
+ default:
+ b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ break;
+ }
+ }
+ else
+ {
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
+ return;
+ }
+ }
+ if (is_tun)
+ {
+ if (ipsec_sa_is_set_IS_PROTECT (sa0))
+ {
+ /*
+ * There are two encap possibilities
+ * 1) the tunnel and ths SA are prodiving encap, i.e. it's
+ * MAC | SA-IP | TUN-IP | ESP | PAYLOAD
+ * implying the SA is in tunnel mode (on a tunnel interface)
+ * 2) only the tunnel provides encap
+ * MAC | TUN-IP | ESP | PAYLOAD
+ * implying the SA is in transport mode.
+ *
+ * For 2) we need only strip the tunnel encap and we're good.
+ * since the tunnel and crypto ecnap (int the tun=protect
+ * object) are the same and we verified above that these match
+ * for 1) we need to strip the SA-IP outer headers, to
+ * reveal the tunnel IP and then check that this matches
+ * the configured tunnel.
+ */
+ const ipsec_tun_protect_t *itp;
+
+ if (is_async)
+ itp = ipsec_tun_protect_get (pd->protect_index);
+ else
+ itp =
+ ipsec_tun_protect_get (vnet_buffer (b)->
+ ipsec.protect_index);
+
+ if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
+ {
+ const ip4_header_t *ip4;
+
+ ip4 = vlib_buffer_get_current (b);
+
+ if (!ip46_address_is_equal_v4 (&itp->itp_tun.src,
+ &ip4->dst_address) ||
+ !ip46_address_is_equal_v4 (&itp->itp_tun.dst,
+ &ip4->src_address))
+ {
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
+ }
+ }
+ else if (next_header == IP_PROTOCOL_IPV6)
+ {
+ const ip6_header_t *ip6;
+
+ ip6 = vlib_buffer_get_current (b);
+
+ if (!ip46_address_is_equal_v6 (&itp->itp_tun.src,
+ &ip6->dst_address) ||
+ !ip46_address_is_equal_v6 (&itp->itp_tun.dst,
+ &ip6->src_address))
+ {
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
+ }
+ }
+ }
+ }
+ }
+}
always_inline uword
-esp_decrypt_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * from_frame,
- int is_ip6)
+esp_decrypt_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *from_frame, int is_ip6, int is_tun,
+ u16 async_next_node)
{
ipsec_main_t *im = &ipsec_main;
u32 thread_index = vm->thread_index;
- u16 buffer_data_size = vlib_buffer_get_default_data_size (vm);
u16 len;
ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, thread_index);
u32 *from = vlib_frame_vector_args (from_frame);
- u32 n, n_left = from_frame->n_vectors;
+ u32 n_left = from_frame->n_vectors;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
- u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_buffer_t *sync_bufs[VLIB_FRAME_SIZE];
+ u16 sync_nexts[VLIB_FRAME_SIZE], *sync_next = sync_nexts, n_sync = 0;
+ u16 async_nexts[VLIB_FRAME_SIZE], *async_next = async_nexts, n_async = 0;
+ u16 noop_nexts[VLIB_FRAME_SIZE], *noop_next = noop_nexts, n_noop = 0;
+ u32 sync_bi[VLIB_FRAME_SIZE];
+ u32 noop_bi[VLIB_FRAME_SIZE];
esp_decrypt_packet_data_t pkt_data[VLIB_FRAME_SIZE], *pd = pkt_data;
+ esp_decrypt_packet_data2_t pkt_data2[VLIB_FRAME_SIZE], *pd2 = pkt_data2;
esp_decrypt_packet_data_t cpd = { };
u32 current_sa_index = ~0, current_sa_bytes = 0, current_sa_pkts = 0;
const u8 esp_sz = sizeof (esp_header_t);
ipsec_sa_t *sa0 = 0;
+ vnet_crypto_op_t _op, *op = &_op;
+ vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
+ vnet_crypto_op_t **integ_ops = &ptd->integ_ops;
+ int is_async = im->async_mode;
+ vnet_crypto_async_op_id_t async_op = ~0;
+ vnet_crypto_async_frame_t *async_frames[VNET_CRYPTO_ASYNC_OP_N_IDS];
+ esp_decrypt_error_t err;
vlib_get_buffers (vm, from, b, n_left);
- vec_reset_length (ptd->crypto_ops);
- vec_reset_length (ptd->integ_ops);
- clib_memset_u16 (nexts, -1, n_left);
+ if (!is_async)
+ {
+ vec_reset_length (ptd->crypto_ops);
+ vec_reset_length (ptd->integ_ops);
+ vec_reset_length (ptd->chained_crypto_ops);
+ vec_reset_length (ptd->chained_integ_ops);
+ }
+ vec_reset_length (ptd->async_frames);
+ vec_reset_length (ptd->chunks);
+ clib_memset (sync_nexts, -1, sizeof (sync_nexts));
+ clib_memset (async_frames, 0, sizeof (async_frames));
while (n_left > 0)
{
u8 *payload;
+ err = ESP_DECRYPT_ERROR_RX_PKTS;
if (n_left > 2)
{
u8 *p;
CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
}
- if (vlib_buffer_chain_linearize (vm, b[0]) != 1)
+ u32 n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
+ if (n_bufs == 0)
{
- b[0]->error = node->errors[ESP_DECRYPT_ERROR_CHAINED_BUFFER];
- next[0] = ESP_DECRYPT_NEXT_DROP;
+ err = ESP_DECRYPT_ERROR_NO_BUFFERS;
+ esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
+ ESP_DECRYPT_NEXT_DROP);
goto next;
}
if (vnet_buffer (b[0])->ipsec.sad_index != current_sa_index)
{
+ if (current_sa_pkts)
+ vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
+ current_sa_index,
+ current_sa_pkts,
+ current_sa_bytes);
+ current_sa_bytes = current_sa_pkts = 0;
+
current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
- sa0 = pool_elt_at_index (im->sad, current_sa_index);
+ sa0 = ipsec_sa_get (current_sa_index);
+
+ /* fetch the second cacheline ASAP */
+ CLIB_PREFETCH (sa0->cacheline1, CLIB_CACHE_LINE_BYTES, LOAD);
cpd.icv_sz = sa0->integ_icv_size;
cpd.iv_sz = sa0->crypto_iv_size;
cpd.flags = sa0->flags;
cpd.sa_index = current_sa_index;
+ is_async = im->async_mode | ipsec_sa_is_set_IS_ASYNC (sa0);
+ }
- vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
- current_sa_index, current_sa_pkts,
- current_sa_bytes);
+ if (is_async)
+ {
+ async_op = sa0->crypto_async_dec_op_id;
- current_sa_bytes = current_sa_pkts = 0;
+ /* get a frame for this op if we don't yet have one or it's full
+ */
+ if (NULL == async_frames[async_op] ||
+ vnet_crypto_async_frame_is_full (async_frames[async_op]))
+ {
+ async_frames[async_op] =
+ vnet_crypto_async_get_frame (vm, async_op);
+ /* Save the frame to the list we'll submit at the end */
+ vec_add1 (ptd->async_frames, async_frames[async_op]);
+ }
+ }
+
+ if (PREDICT_FALSE (~0 == sa0->thread_index))
+ {
+ /* this is the first packet to use this SA, claim the SA
+ * for this thread. this could happen simultaneously on
+ * another thread */
+ clib_atomic_cmp_and_swap (&sa0->thread_index, ~0,
+ ipsec_sa_assign_thread (thread_index));
+ }
+
+ if (PREDICT_FALSE (thread_index != sa0->thread_index))
+ {
+ vnet_buffer (b[0])->ipsec.thread_index = sa0->thread_index;
+ err = ESP_DECRYPT_ERROR_HANDOFF;
+ esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
+ ESP_DECRYPT_NEXT_HANDOFF);
+ goto next;
}
/* store packet data for next round for easier prefetch */
pd->sa_data = cpd.sa_data;
pd->current_data = b[0]->current_data;
- pd->current_length = b[0]->current_length;
pd->hdr_sz = pd->current_data - vnet_buffer (b[0])->l3_hdr_offset;
payload = b[0]->data + pd->current_data;
+ pd->seq = clib_host_to_net_u32 (((esp_header_t *) payload)->seq);
+ pd->is_chain = 0;
+ pd2->lb = b[0];
+ pd2->free_buffer_index = 0;
+ pd2->icv_removed = 0;
- /* we need 4 extra bytes for HMAC calculation when ESN are used */
- if (ipsec_sa_is_set_USE_ESN (sa0) && pd->icv_sz &&
- (pd->current_data + pd->current_length + 4 > buffer_data_size))
+ if (n_bufs > 1)
{
- b[0]->error = node->errors[ESP_DECRYPT_ERROR_NO_TAIL_SPACE];
- next[0] = ESP_DECRYPT_NEXT_DROP;
- goto next;
+ pd->is_chain = 1;
+ /* find last buffer in the chain */
+ while (pd2->lb->flags & VLIB_BUFFER_NEXT_PRESENT)
+ pd2->lb = vlib_get_buffer (vm, pd2->lb->next_buffer);
+
+ crypto_ops = &ptd->chained_crypto_ops;
+ integ_ops = &ptd->chained_integ_ops;
}
+ pd->current_length = b[0]->current_length;
+
/* anti-reply check */
- if (ipsec_sa_anti_replay_check (sa0, &((esp_header_t *) payload)->seq))
+ if (ipsec_sa_anti_replay_check (sa0, pd->seq))
{
- b[0]->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
- next[0] = ESP_DECRYPT_NEXT_DROP;
+ err = ESP_DECRYPT_ERROR_REPLAY;
+ esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
+ ESP_DECRYPT_NEXT_DROP);
goto next;
}
- len = pd->current_length - cpd.icv_sz;
- current_sa_pkts += 1;
- current_sa_bytes += pd->current_length;
-
- if (PREDICT_TRUE (cpd.icv_sz > 0))
- {
- vnet_crypto_op_t *op;
- vec_add2_aligned (ptd->integ_ops, op, 1, CLIB_CACHE_LINE_BYTES);
-
- vnet_crypto_op_init (op, sa0->integ_op_id);
- op->key = sa0->integ_key.data;
- op->key_len = sa0->integ_key.len;
- op->src = payload;
- op->flags = VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
- op->user_data = b - bufs;
- op->digest = payload + len;
- op->digest_len = cpd.icv_sz;
- op->len = len;
- if (ipsec_sa_is_set_USE_ESN (sa0))
- {
- /* shift ICV for 4 bytes to insert ESN */
- u8 tmp[ESP_MAX_ICV_SIZE], sz = sizeof (sa0->seq_hi);
- clib_memcpy_fast (tmp, payload + len, ESP_MAX_ICV_SIZE);
- clib_memcpy_fast (payload + len, &sa0->seq_hi, sz);
- clib_memcpy_fast (payload + len + sz, tmp, ESP_MAX_ICV_SIZE);
- op->len += sz;
- op->digest += sz;
- }
+ if (pd->current_length < cpd.icv_sz + esp_sz + cpd.iv_sz)
+ {
+ err = ESP_DECRYPT_ERROR_RUNT;
+ esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
+ ESP_DECRYPT_NEXT_DROP);
+ goto next;
}
- payload += esp_sz;
- len -= esp_sz;
+ len = pd->current_length - cpd.icv_sz;
+ current_sa_pkts += 1;
+ current_sa_bytes += vlib_buffer_length_in_chain (vm, b[0]);
- if (sa0->crypto_enc_op_id != VNET_CRYPTO_OP_NONE)
+ if (is_async)
{
- vnet_crypto_op_t *op;
- vec_add2_aligned (ptd->crypto_ops, op, 1, CLIB_CACHE_LINE_BYTES);
- vnet_crypto_op_init (op, sa0->crypto_dec_op_id);
- op->key = sa0->crypto_key.data;
- op->iv = payload;
- op->src = op->dst = payload += cpd.iv_sz;
- op->len = len - cpd.iv_sz;
- op->user_data = b - bufs;
- }
+ err = esp_decrypt_prepare_async_frame (
+ vm, node, ptd, async_frames[async_op], sa0, payload, len,
+ cpd.icv_sz, cpd.iv_sz, pd, pd2, from[b - bufs], b[0], async_next,
+ async_next_node);
+ if (ESP_DECRYPT_ERROR_RX_PKTS != err)
+ {
+ esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
+ ESP_DECRYPT_NEXT_DROP);
+ }
+ }
+ else
+ esp_decrypt_prepare_sync_op (
+ vm, node, ptd, &crypto_ops, &integ_ops, op, sa0, payload, len,
+ cpd.icv_sz, cpd.iv_sz, pd, pd2, b[0], sync_next, b - bufs);
/* next */
next:
+ if (ESP_DECRYPT_ERROR_RX_PKTS != err)
+ {
+ noop_bi[n_noop] = from[b - bufs];
+ n_noop++;
+ noop_next++;
+ }
+ else if (!is_async)
+ {
+ sync_bi[n_sync] = from[b - bufs];
+ sync_bufs[n_sync] = b[0];
+ n_sync++;
+ sync_next++;
+ pd += 1;
+ pd2 += 1;
+ }
+ else
+ {
+ n_async++;
+ async_next++;
+ }
n_left -= 1;
- next += 1;
- pd += 1;
b += 1;
}
- vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
- current_sa_index, current_sa_pkts,
- current_sa_bytes);
+ if (PREDICT_TRUE (~0 != current_sa_index))
+ vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
+ current_sa_index, current_sa_pkts,
+ current_sa_bytes);
- if ((n = vec_len (ptd->integ_ops)))
+ if (n_async)
{
- vnet_crypto_op_t *op = ptd->integ_ops;
- n -= vnet_crypto_process_ops (vm, op, n);
- while (n)
+ /* submit all of the open frames */
+ vnet_crypto_async_frame_t **async_frame;
+
+ vec_foreach (async_frame, ptd->async_frames)
{
- ASSERT (op - ptd->integ_ops < vec_len (ptd->integ_ops));
- if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
+ if (vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0)
{
- u32 err, bi = op->user_data;
- if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
- err = ESP_DECRYPT_ERROR_INTEG_ERROR;
- else
- err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
- bufs[bi]->error = node->errors[err];
- nexts[bi] = ESP_DECRYPT_NEXT_DROP;
- n--;
+ n_noop += esp_async_recycle_failed_submit (
+ vm, *async_frame, node, ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR,
+ n_sync, noop_bi, noop_nexts, ESP_DECRYPT_NEXT_DROP);
+ vnet_crypto_async_reset_frame (*async_frame);
+ vnet_crypto_async_free_frame (vm, *async_frame);
}
- op++;
}
}
- if ((n = vec_len (ptd->crypto_ops)))
- {
- vnet_crypto_op_t *op = ptd->crypto_ops;
- n -= vnet_crypto_process_ops (vm, op, n);
- while (n)
- {
- ASSERT (op - ptd->crypto_ops < vec_len (ptd->crypto_ops));
- if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
- {
- u32 err, bi;
-
- bi = op->user_data;
-
- if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
- err = ESP_DECRYPT_ERROR_DECRYPTION_FAILED;
- else
- err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
- bufs[bi]->error = node->errors[err];
- nexts[bi] = ESP_DECRYPT_NEXT_DROP;
- n--;
- }
- op++;
- }
+ if (n_sync)
+ {
+ esp_process_ops (vm, node, ptd->integ_ops, sync_bufs, sync_nexts,
+ ESP_DECRYPT_ERROR_INTEG_ERROR);
+ esp_process_chained_ops (vm, node, ptd->chained_integ_ops, sync_bufs,
+ sync_nexts, ptd->chunks,
+ ESP_DECRYPT_ERROR_INTEG_ERROR);
+
+ esp_process_ops (vm, node, ptd->crypto_ops, sync_bufs, sync_nexts,
+ ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
+ esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, sync_bufs,
+ sync_nexts, ptd->chunks,
+ ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
}
/* Post decryption ronud - adjust packet data start and length and next
node */
- n_left = from_frame->n_vectors;
- next = nexts;
+ n_left = n_sync;
+ sync_next = sync_nexts;
pd = pkt_data;
- b = bufs;
+ pd2 = pkt_data2;
+ b = sync_bufs;
while (n_left)
{
- const u8 tun_flags = IPSEC_SA_FLAG_IS_TUNNEL |
- IPSEC_SA_FLAG_IS_TUNNEL_V6;
-
if (n_left >= 2)
{
void *data = b[1]->data + pd[1].current_data;
CLIB_CACHE_LINE_BYTES * 2, LOAD);
}
- if (next[0] < ESP_DECRYPT_N_NEXT)
- goto trace;
+ /* save the sa_index as GRE_teb post_crypto changes L2 opaque */
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
- sa0 = vec_elt_at_index (im->sad, pd->sa_index);
- u8 *payload = b[0]->data + pd->current_data;
+ if (sync_next[0] >= ESP_DECRYPT_N_NEXT)
+ esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], sync_next, is_ip6,
+ is_tun, 0);
- ipsec_sa_anti_replay_advance (sa0, &((esp_header_t *) payload)->seq);
+ /* trace: */
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ esp_decrypt_trace_t *tr;
+ tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
+ sa0 = ipsec_sa_get (current_sa_index);
+ tr->crypto_alg = sa0->crypto_alg;
+ tr->integ_alg = sa0->integ_alg;
+ tr->seq = pd->seq;
+ tr->sa_seq = sa0->last_seq;
+ tr->sa_seq_hi = sa0->seq_hi;
+ }
- esp_footer_t *f = (esp_footer_t *) (b[0]->data + pd->current_data +
- pd->current_length - sizeof (*f) -
- pd->icv_sz);
- u16 adv = pd->iv_sz + esp_sz;
- u16 tail = sizeof (esp_footer_t) + f->pad_length + pd->icv_sz;
+ /* next */
+ n_left -= 1;
+ sync_next += 1;
+ pd += 1;
+ pd2 += 1;
+ b += 1;
+ }
- if ((pd->flags & tun_flags) == 0) /* transport mode */
- {
- u8 udp_sz = (is_ip6 == 0 && pd->flags & IPSEC_SA_FLAG_UDP_ENCAP) ?
- sizeof (udp_header_t) : 0;
- u16 ip_hdr_sz = pd->hdr_sz - udp_sz;
- u8 *old_ip = b[0]->data + pd->current_data - ip_hdr_sz - udp_sz;
- u8 *ip = old_ip + adv + udp_sz;
+ vlib_node_increment_counter (vm, node->node_index, ESP_DECRYPT_ERROR_RX_PKTS,
+ from_frame->n_vectors);
- if (is_ip6 && ip_hdr_sz > 64)
- memmove (ip, old_ip, ip_hdr_sz);
- else
- clib_memcpy_le64 (ip, old_ip, ip_hdr_sz);
+ if (n_sync)
+ vlib_buffer_enqueue_to_next (vm, node, sync_bi, sync_nexts, n_sync);
- b[0]->current_data = pd->current_data + adv - ip_hdr_sz;
- b[0]->current_length = pd->current_length + ip_hdr_sz - tail - adv;
+ if (n_noop)
+ vlib_buffer_enqueue_to_next (vm, node, noop_bi, noop_nexts, n_noop);
- if (is_ip6)
- {
- ip6_header_t *ip6 = (ip6_header_t *) ip;
- u16 len = clib_net_to_host_u16 (ip6->payload_length);
- len -= adv + tail;
- ip6->payload_length = clib_host_to_net_u16 (len);
- ip6->protocol = f->next_header;
- next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
- }
- else
- {
- ip4_header_t *ip4 = (ip4_header_t *) ip;
- ip_csum_t sum = ip4->checksum;
- u16 len = clib_net_to_host_u16 (ip4->length);
- len = clib_host_to_net_u16 (len - adv - tail - udp_sz);
- sum = ip_csum_update (sum, ip4->protocol, f->next_header,
- ip4_header_t, protocol);
- sum = ip_csum_update (sum, ip4->length, len,
- ip4_header_t, length);
- ip4->checksum = ip_csum_fold (sum);
- ip4->protocol = f->next_header;
- ip4->length = len;
- next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
- }
+ return (from_frame->n_vectors);
+}
+
+always_inline uword
+esp_decrypt_post_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, int is_ip6, int is_tun)
+{
+ u32 *from = vlib_frame_vector_args (from_frame);
+ u32 n_left = from_frame->n_vectors;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left);
+
+ while (n_left > 0)
+ {
+ esp_decrypt_packet_data_t *pd = &(esp_post_data (b[0]))->decrypt_data;
+
+ if (n_left > 2)
+ {
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ vlib_prefetch_buffer_header (b[1], LOAD);
}
+
+ if (!pd->is_chain)
+ esp_decrypt_post_crypto (vm, node, pd, 0, b[0], next, is_ip6, is_tun,
+ 1);
else
{
- if (PREDICT_TRUE (f->next_header == IP_PROTOCOL_IP_IN_IP))
- {
- next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
- b[0]->current_data = pd->current_data + adv;
- b[0]->current_length = pd->current_length + adv - tail;
- }
- else if (f->next_header == IP_PROTOCOL_IPV6)
- {
- next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
- b[0]->current_data = pd->current_data + adv;
- b[0]->current_length = pd->current_length + adv - tail;
- }
- else
- {
- next[0] = ESP_DECRYPT_NEXT_DROP;
- b[0]->error = node->errors[ESP_DECRYPT_ERROR_DECRYPTION_FAILED];
- }
+ esp_decrypt_packet_data2_t *pd2 = esp_post_data2 (b[0]);
+ esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], next, is_ip6,
+ is_tun, 1);
}
- if (PREDICT_FALSE (ipsec_sa_is_set_IS_GRE (sa0)))
- next[0] = ESP_DECRYPT_NEXT_IPSEC_GRE_INPUT;
-
- trace:
+ /*trace: */
if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
{
+ ipsec_sa_t *sa0 = ipsec_sa_get (pd->sa_index);
esp_decrypt_trace_t *tr;
- u8 *payload = b[0]->data + pd->current_data;
+ esp_decrypt_packet_data_t *async_pd =
+ &(esp_post_data (b[0]))->decrypt_data;
tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
- sa0 = pool_elt_at_index (im->sad,
- vnet_buffer (b[0])->ipsec.sad_index);
+ sa0 = ipsec_sa_get (async_pd->sa_index);
+
tr->crypto_alg = sa0->crypto_alg;
tr->integ_alg = sa0->integ_alg;
- tr->seq = clib_host_to_net_u32 (((esp_header_t *) payload)->seq);
+ tr->seq = pd->seq;
+ tr->sa_seq = sa0->last_seq;
+ tr->sa_seq_hi = sa0->seq_hi;
}
- /* next */
- n_left -= 1;
- next += 1;
- pd += 1;
- b += 1;
+ n_left--;
+ next++;
+ b++;
}
n_left = from_frame->n_vectors;
vlib_node_increment_counter (vm, node->node_index,
- ESP_DECRYPT_ERROR_RX_PKTS, n_left);
+ ESP_DECRYPT_ERROR_RX_POST_PKTS, n_left);
vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
- b = bufs;
return n_left;
}
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return esp_decrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ );
+ return esp_decrypt_inline (vm, node, from_frame, 0, 0,
+ esp_decrypt_async_next.esp4_post_next);
+}
+
+VLIB_NODE_FN (esp4_decrypt_post_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_decrypt_post_inline (vm, node, from_frame, 0, 0);
+}
+
+VLIB_NODE_FN (esp4_decrypt_tun_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_decrypt_inline (vm, node, from_frame, 0, 1,
+ esp_decrypt_async_next.esp4_tun_post_next);
+}
+
+VLIB_NODE_FN (esp4_decrypt_tun_post_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_decrypt_post_inline (vm, node, from_frame, 0, 1);
+}
+
+VLIB_NODE_FN (esp6_decrypt_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_decrypt_inline (vm, node, from_frame, 1, 0,
+ esp_decrypt_async_next.esp6_post_next);
+}
+
+VLIB_NODE_FN (esp6_decrypt_post_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_decrypt_post_inline (vm, node, from_frame, 1, 0);
+}
+
+VLIB_NODE_FN (esp6_decrypt_tun_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_decrypt_inline (vm, node, from_frame, 1, 1,
+ esp_decrypt_async_next.esp6_tun_post_next);
+}
+
+VLIB_NODE_FN (esp6_decrypt_tun_post_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_decrypt_post_inline (vm, node, from_frame, 1, 1);
}
/* *INDENT-OFF* */
.n_next_nodes = ESP_DECRYPT_N_NEXT,
.next_nodes = {
-#define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
- foreach_esp_decrypt_next
-#undef _
+ [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
+ [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
+ [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
+ [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-drop",
+ [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
+ [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-handoff",
},
};
-/* *INDENT-ON* */
-VLIB_NODE_FN (esp6_decrypt_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return esp_decrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ );
-}
+VLIB_REGISTER_NODE (esp4_decrypt_post_node) = {
+ .name = "esp4-decrypt-post",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+ .error_strings = esp_decrypt_error_strings,
+
+ .sibling_of = "esp4-decrypt",
+};
-/* *INDENT-OFF* */
VLIB_REGISTER_NODE (esp6_decrypt_node) = {
.name = "esp6-decrypt",
.vector_size = sizeof (u32),
.n_next_nodes = ESP_DECRYPT_N_NEXT,
.next_nodes = {
-#define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
- foreach_esp_decrypt_next
-#undef _
+ [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
+ [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
+ [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
+ [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-drop",
+ [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
+ [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-handoff",
},
};
+
+VLIB_REGISTER_NODE (esp6_decrypt_post_node) = {
+ .name = "esp6-decrypt-post",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+ .error_strings = esp_decrypt_error_strings,
+
+ .sibling_of = "esp6-decrypt",
+};
+
+VLIB_REGISTER_NODE (esp4_decrypt_tun_node) = {
+ .name = "esp4-decrypt-tun",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+ .error_strings = esp_decrypt_error_strings,
+ .n_next_nodes = ESP_DECRYPT_N_NEXT,
+ .next_nodes = {
+ [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
+ [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
+ [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
+ [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
+ [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
+ [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-tun-handoff",
+ },
+};
+
+VLIB_REGISTER_NODE (esp4_decrypt_tun_post_node) = {
+ .name = "esp4-decrypt-tun-post",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+ .error_strings = esp_decrypt_error_strings,
+
+ .sibling_of = "esp4-decrypt-tun",
+};
+
+VLIB_REGISTER_NODE (esp6_decrypt_tun_node) = {
+ .name = "esp6-decrypt-tun",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+ .error_strings = esp_decrypt_error_strings,
+ .n_next_nodes = ESP_DECRYPT_N_NEXT,
+ .next_nodes = {
+ [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
+ [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
+ [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
+ [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
+ [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
+ [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-tun-handoff",
+ },
+};
+
+VLIB_REGISTER_NODE (esp6_decrypt_tun_post_node) = {
+ .name = "esp6-decrypt-tun-post",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+ .error_strings = esp_decrypt_error_strings,
+
+ .sibling_of = "esp6-decrypt-tun",
+};
/* *INDENT-ON* */
+#ifndef CLIB_MARCH_VARIANT
+
+static clib_error_t *
+esp_decrypt_init (vlib_main_t *vm)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ im->esp4_dec_fq_index =
+ vlib_frame_queue_main_init (esp4_decrypt_node.index, 0);
+ im->esp6_dec_fq_index =
+ vlib_frame_queue_main_init (esp6_decrypt_node.index, 0);
+ im->esp4_dec_tun_fq_index =
+ vlib_frame_queue_main_init (esp4_decrypt_tun_node.index, 0);
+ im->esp6_dec_tun_fq_index =
+ vlib_frame_queue_main_init (esp6_decrypt_tun_node.index, 0);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (esp_decrypt_init);
+
+#endif
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff