#include <vnet/ip/ip.h>
#include <vnet/crypto/crypto.h>
#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/ipsec.api_enum.h>
typedef struct
{
u8 next_header;
} esp_footer_t;
-/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip4_header_t ip4;
esp_header_t esp;
}) ip4_and_esp_header_t;
-/* *INDENT-ON* */
-/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip4_header_t ip4;
udp_header_t udp;
esp_header_t esp;
}) ip4_and_udp_and_esp_header_t;
-/* *INDENT-ON* */
-/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip6_header_t ip6;
esp_header_t esp;
}) 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
} __clib_packed esp_aead_t;
#define ESP_SEQ_MAX (4294967295UL)
-#define ESP_MAX_BLOCK_SIZE (16)
-#define ESP_MAX_IV_SIZE (16)
-#define ESP_MAX_ICV_SIZE (32)
u8 *format_esp_header (u8 * s, va_list * args);
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,
+ u32 seq_hi)
{
- 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);
+ /* SPI, seq-hi, seq-low */
+ aad->data[1] = (u32) clib_host_to_net_u32 (seq_hi);
+ aad->data[2] = esp->seq;
+ return 12;
+ }
+ else
+ {
+ /* SPI, seq-low */
+ aad->data[1] = esp->seq;
+ return 8;
+ }
+}
- op->len += 4;
- clib_memcpy (data + data_len, &seq_hi, 4);
+always_inline u32
+esp_encrypt_err_to_sa_err (u32 err)
+{
+ switch (err)
+ {
+ case ESP_ENCRYPT_ERROR_HANDOFF:
+ return IPSEC_SA_ERROR_HANDOFF;
+ case ESP_ENCRYPT_ERROR_SEQ_CYCLED:
+ return IPSEC_SA_ERROR_SEQ_CYCLED;
+ case ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR:
+ return IPSEC_SA_ERROR_CRYPTO_ENGINE_ERROR;
+ case ESP_ENCRYPT_ERROR_CRYPTO_QUEUE_FULL:
+ return IPSEC_SA_ERROR_CRYPTO_QUEUE_FULL;
+ case ESP_ENCRYPT_ERROR_NO_BUFFERS:
+ return IPSEC_SA_ERROR_NO_BUFFERS;
+ case ESP_ENCRYPT_ERROR_NO_ENCRYPTION:
+ return IPSEC_SA_ERROR_NO_ENCRYPTION;
}
+ return ~0;
+}
- vnet_crypto_process_ops (vm, op, 1);
- return sa->integ_icv_size;
+always_inline u32
+esp_decrypt_err_to_sa_err (u32 err)
+{
+ switch (err)
+ {
+ case ESP_DECRYPT_ERROR_HANDOFF:
+ return IPSEC_SA_ERROR_HANDOFF;
+ case ESP_DECRYPT_ERROR_DECRYPTION_FAILED:
+ return IPSEC_SA_ERROR_DECRYPTION_FAILED;
+ case ESP_DECRYPT_ERROR_INTEG_ERROR:
+ return IPSEC_SA_ERROR_INTEG_ERROR;
+ case ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR:
+ return IPSEC_SA_ERROR_CRYPTO_ENGINE_ERROR;
+ case ESP_DECRYPT_ERROR_REPLAY:
+ return IPSEC_SA_ERROR_REPLAY;
+ case ESP_DECRYPT_ERROR_RUNT:
+ return IPSEC_SA_ERROR_RUNT;
+ case ESP_DECRYPT_ERROR_NO_BUFFERS:
+ return IPSEC_SA_ERROR_NO_BUFFERS;
+ case ESP_DECRYPT_ERROR_OVERSIZED_HEADER:
+ return IPSEC_SA_ERROR_OVERSIZED_HEADER;
+ case ESP_DECRYPT_ERROR_NO_TAIL_SPACE:
+ return IPSEC_SA_ERROR_NO_TAIL_SPACE;
+ case ESP_DECRYPT_ERROR_TUN_NO_PROTO:
+ return IPSEC_SA_ERROR_TUN_NO_PROTO;
+ case ESP_DECRYPT_ERROR_UNSUP_PAYLOAD:
+ return IPSEC_SA_ERROR_UNSUP_PAYLOAD;
+ }
+ return ~0;
}
always_inline void
-esp_aad_fill (vnet_crypto_op_t * op,
- const esp_header_t * esp, const ipsec_sa_t * sa)
+esp_encrypt_set_next_index (vlib_buffer_t *b, vlib_node_runtime_t *node,
+ u32 thread_index, u32 err, u16 index, u16 *nexts,
+ u16 drop_next, u32 sa_index)
{
- esp_aead_t *aad;
+ ipsec_set_next_index (b, node, thread_index, err,
+ esp_encrypt_err_to_sa_err (err), index, nexts,
+ drop_next, sa_index);
+}
- aad = (esp_aead_t *) op->aad;
- aad->data[0] = esp->spi;
+always_inline void
+esp_decrypt_set_next_index (vlib_buffer_t *b, vlib_node_runtime_t *node,
+ u32 thread_index, u32 err, u16 index, u16 *nexts,
+ u16 drop_next, u32 sa_index)
+{
+ ipsec_set_next_index (b, node, thread_index, err,
+ esp_decrypt_err_to_sa_err (err), index, nexts,
+ drop_next, sa_index);
+}
- if (ipsec_sa_is_set_USE_ESN (sa))
+/**
+ * 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
{
- /* SPI, seq-hi, seq-low */
- aad->data[1] = clib_host_to_net_u32 (sa->seq_hi);
- aad->data[2] = esp->seq;
- op->aad_len = 12;
- }
- else
+ 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 seq_hi;
+} 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;
+
+/* 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,
+ u32 ipsec_sa_err, u16 index, u32 *from,
+ u16 *nexts, u16 drop_next_index,
+ bool is_encrypt)
+{
+ vlib_buffer_t *b;
+ u32 n_drop = f->n_elts;
+ u32 *bi = f->buffer_indices;
+
+ while (n_drop--)
{
- /* SPI, seq-low */
- aad->data[1] = esp->seq;
- op->aad_len = 8;
+ u32 sa_index;
+
+ from[index] = bi[0];
+ b = vlib_get_buffer (vm, bi[0]);
+
+ if (is_encrypt)
+ {
+ sa_index = vnet_buffer (b)->ipsec.sad_index;
+ }
+ else
+ {
+ sa_index = esp_post_data (b)->decrypt_data.sa_index;
+ }
+
+ ipsec_set_next_index (b, node, vm->thread_index, err, ipsec_sa_err,
+ index, nexts, drop_next_index, sa_index);
+ bi++;
+ index++;
}
+
+ return (f->n_elts);
}
+
#endif /* __ESP_H__ */
/*
Code Review / vpp.git / blobdiff