typedef struct
{
- u32 spi;
+ union
+ {
+ u32 spi;
+ u8 spi_bytes[4];
+ };
u32 seq;
u8 data[0];
} esp_header_t;
}) ip6_and_esp_header_t;
/* *INDENT-ON* */
+/**
+ * AES counter mode nonce
+ */
+typedef struct
+{
+ u32 salt;
+ u64 iv;
+ u32 ctr; /* counter: 1 in big-endian for ctr, unused for gcm */
+} __clib_packed esp_ctr_nonce_t;
+
+STATIC_ASSERT_SIZEOF (esp_ctr_nonce_t, 16);
+
/**
* AES GCM Additional Authentication data
*/
return 0;
}
-
-always_inline unsigned int
-hmac_calc (vlib_main_t * vm, ipsec_sa_t * sa, u8 * data, int data_len,
- u8 * signature)
+always_inline u16
+esp_aad_fill (u8 * data, const esp_header_t * esp, const ipsec_sa_t * sa)
{
- vnet_crypto_op_t _op, *op = &_op;
-
- if (PREDICT_FALSE (sa->integ_op_id == 0))
- return 0;
+ esp_aead_t *aad;
- vnet_crypto_op_init (op, sa->integ_op_id);
- op->key_index = sa->integ_key_index;
- op->src = data;
- op->len = data_len;
- op->digest = signature;
- op->digest_len = sa->integ_icv_size;
+ aad = (esp_aead_t *) data;
+ aad->data[0] = esp->spi;
if (ipsec_sa_is_set_USE_ESN (sa))
{
- u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
-
- op->len += 4;
- clib_memcpy (data + data_len, &seq_hi, 4);
+ /* SPI, seq-hi, seq-low */
+ aad->data[1] = (u32) clib_host_to_net_u32 (sa->seq_hi);
+ aad->data[2] = esp->seq;
+ return 12;
+ }
+ else
+ {
+ /* SPI, seq-low */
+ aad->data[1] = esp->seq;
+ return 8;
}
-
- vnet_crypto_process_ops (vm, op, 1);
- return sa->integ_icv_size;
}
+/* Special case to drop or hand off packets for sync/async modes.
+ *
+ * Different than sync mode, async mode only enqueue drop or hand-off packets
+ * to next nodes.
+ */
always_inline void
-esp_aad_fill (vnet_crypto_op_t * op,
- const esp_header_t * esp, const ipsec_sa_t * sa)
+esp_set_next_index (vlib_buffer_t *b, vlib_node_runtime_t *node, u32 err,
+ u16 index, u16 *nexts, u16 drop_next)
{
- esp_aead_t *aad;
+ nexts[index] = drop_next;
+ b->error = node->errors[err];
+}
- aad = (esp_aead_t *) op->aad;
- clib_memcpy_fast (aad, esp, 8);
+/* when submitting a frame is failed, drop all buffers in the frame */
+always_inline u32
+esp_async_recycle_failed_submit (vlib_main_t *vm, vnet_crypto_async_frame_t *f,
+ vlib_node_runtime_t *node, u32 err, u16 index,
+ u32 *from, u16 *nexts, u16 drop_next_index)
+{
+ u32 n_drop = f->n_elts;
+ u32 *bi = f->buffer_indices;
- if (ipsec_sa_is_set_USE_ESN (sa))
+ while (n_drop--)
{
- /* SPI, seq-hi, seq-low */
- aad->data[2] = aad->data[1];
- aad->data[1] = clib_host_to_net_u32 (sa->seq_hi);
- op->aad_len = 12;
+ from[index] = bi[0];
+ esp_set_next_index (vlib_get_buffer (vm, bi[0]), node, err, index, nexts,
+ drop_next_index);
+ bi++;
+ index++;
}
- else
- /* SPI, seq-low */
- op->aad_len = 8;
+ vnet_crypto_async_reset_frame (f);
+
+ return (f->n_elts);
}
+
+/**
+ * The post data structure to for esp_encrypt/decrypt_inline to write to
+ * vib_buffer_t opaque unused field, and for post nodes to pick up after
+ * dequeue.
+ **/
+typedef struct
+{
+ union
+ {
+ struct
+ {
+ u8 icv_sz;
+ u8 iv_sz;
+ ipsec_sa_flags_t flags;
+ u32 sa_index;
+ };
+ u64 sa_data;
+ };
+
+ u32 seq;
+ i16 current_data;
+ i16 current_length;
+ u16 hdr_sz;
+ u16 is_chain;
+ u32 protect_index;
+} esp_decrypt_packet_data_t;
+
+STATIC_ASSERT_SIZEOF (esp_decrypt_packet_data_t, 3 * sizeof (u64));
+STATIC_ASSERT_OFFSET_OF (esp_decrypt_packet_data_t, seq, sizeof (u64));
+
+/* we are forced to store the decrypt post data into 2 separate places -
+ vlib_opaque and opaque2. */
+typedef struct
+{
+ vlib_buffer_t *lb;
+ u32 free_buffer_index;
+ u8 icv_removed;
+} esp_decrypt_packet_data2_t;
+
+typedef union
+{
+ u16 next_index;
+ esp_decrypt_packet_data_t decrypt_data;
+} esp_post_data_t;
+
+STATIC_ASSERT (sizeof (esp_post_data_t) <=
+ STRUCT_SIZE_OF (vnet_buffer_opaque_t, unused),
+ "Custom meta-data too large for vnet_buffer_opaque_t");
+
+#define esp_post_data(b) \
+ ((esp_post_data_t *)((u8 *)((b)->opaque) \
+ + STRUCT_OFFSET_OF (vnet_buffer_opaque_t, unused)))
+
+STATIC_ASSERT (sizeof (esp_decrypt_packet_data2_t) <=
+ STRUCT_SIZE_OF (vnet_buffer_opaque2_t, unused),
+ "Custom meta-data too large for vnet_buffer_opaque2_t");
+
+#define esp_post_data2(b) \
+ ((esp_decrypt_packet_data2_t *)((u8 *)((b)->opaque2) \
+ + STRUCT_OFFSET_OF (vnet_buffer_opaque2_t, unused)))
+
+typedef struct
+{
+ /* esp post node index for async crypto */
+ u32 esp4_post_next;
+ u32 esp6_post_next;
+ u32 esp4_tun_post_next;
+ u32 esp6_tun_post_next;
+ u32 esp_mpls_tun_post_next;
+} esp_async_post_next_t;
+
+extern esp_async_post_next_t esp_encrypt_async_next;
+extern esp_async_post_next_t esp_decrypt_async_next;
+
#endif /* __ESP_H__ */
/*