}
}
-typedef struct
-{
- u32 salt;
- u64 iv;
-} __clib_packed esp_gcm_nonce_t;
-
-STATIC_ASSERT_SIZEOF (esp_gcm_nonce_t, 12);
-
static_always_inline u32
esp_encrypt_chain_crypto (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
ipsec_sa_t * sa0, vlib_buffer_t * b,
}
always_inline void
-esp_prepare_sync_op (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
- vnet_crypto_op_t ** crypto_ops,
- vnet_crypto_op_t ** integ_ops, ipsec_sa_t * sa0,
- u8 * payload, u16 payload_len, u8 iv_sz, u8 icv_sz,
- vlib_buffer_t ** bufs, vlib_buffer_t ** b,
- vlib_buffer_t * lb, u32 hdr_len, esp_header_t * esp,
- esp_gcm_nonce_t * nonce)
+esp_prepare_sync_op (vlib_main_t *vm, ipsec_per_thread_data_t *ptd,
+ vnet_crypto_op_t **crypto_ops,
+ vnet_crypto_op_t **integ_ops, ipsec_sa_t *sa0,
+ u8 *payload, u16 payload_len, u8 iv_sz, u8 icv_sz,
+ vlib_buffer_t **bufs, vlib_buffer_t **b,
+ vlib_buffer_t *lb, u32 hdr_len, esp_header_t *esp)
{
if (sa0->crypto_enc_op_id)
{
op->len = payload_len - icv_sz;
op->user_data = b - bufs;
- if (ipsec_sa_is_set_IS_AEAD (sa0))
+ if (ipsec_sa_is_set_IS_CTR (sa0))
{
- /*
- * construct the AAD in a scratch space in front
- * of the IP header.
- */
- op->aad = payload - hdr_len - sizeof (esp_aead_t);
- op->aad_len = esp_aad_fill (op->aad, esp, sa0);
-
- op->tag = payload + op->len;
- op->tag_len = 16;
+ ASSERT (sizeof (u64) == iv_sz);
+ /* construct nonce in a scratch space in front of the IP header */
+ esp_ctr_nonce_t *nonce =
+ (esp_ctr_nonce_t *) (payload - sizeof (u64) - hdr_len -
+ sizeof (*nonce));
+ u64 *pkt_iv = (u64 *) (payload - sizeof (u64));
+
+ if (ipsec_sa_is_set_IS_AEAD (sa0))
+ {
+ /* constuct aad in a scratch space in front of the nonce */
+ op->aad = (u8 *) nonce - sizeof (esp_aead_t);
+ op->aad_len = esp_aad_fill (op->aad, esp, sa0);
+ op->tag = payload + op->len;
+ op->tag_len = 16;
+ }
+ else
+ {
+ nonce->ctr = clib_host_to_net_u32 (1);
+ }
- u64 *iv = (u64 *) (payload - iv_sz);
nonce->salt = sa0->salt;
- nonce->iv = *iv = clib_host_to_net_u64 (sa0->gcm_iv_counter++);
+ nonce->iv = *pkt_iv = clib_host_to_net_u64 (sa0->ctr_iv_counter++);
op->iv = (u8 *) nonce;
}
else
crypto_total_len = integ_total_len = payload_len - icv_sz;
tag = payload + crypto_total_len;
- /* aead */
- if (ipsec_sa_is_set_IS_AEAD (sa))
- {
- esp_gcm_nonce_t *nonce;
- u64 *pkt_iv = (u64 *) (payload - iv_sz);
+ key_index = sa->linked_key_index;
- aad = payload - hdr_len - sizeof (esp_aead_t);
- esp_aad_fill (aad, esp, sa);
- nonce = (esp_gcm_nonce_t *) (aad - sizeof (*nonce));
- nonce->salt = sa->salt;
- nonce->iv = *pkt_iv = clib_host_to_net_u64 (sa->gcm_iv_counter++);
- iv = (u8 *) nonce;
- key_index = sa->crypto_key_index;
+ if (ipsec_sa_is_set_IS_CTR (sa))
+ {
+ ASSERT (sizeof (u64) == iv_sz);
+ /* construct nonce in a scratch space in front of the IP header */
+ esp_ctr_nonce_t *nonce = (esp_ctr_nonce_t *) (payload - sizeof (u64) -
+ hdr_len - sizeof (*nonce));
+ u64 *pkt_iv = (u64 *) (payload - sizeof (u64));
- if (lb != b)
+ if (ipsec_sa_is_set_IS_AEAD (sa))
{
- /* chain */
- flag |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
- tag = vlib_buffer_get_tail (lb) - icv_sz;
- crypto_total_len = esp_encrypt_chain_crypto (vm, ptd, sa, b, lb,
- icv_sz, payload,
- payload_len, 0);
+ /* constuct aad in a scratch space in front of the nonce */
+ aad = (u8 *) nonce - sizeof (esp_aead_t);
+ esp_aad_fill (aad, esp, sa);
+ key_index = sa->crypto_key_index;
+ }
+ else
+ {
+ nonce->ctr = clib_host_to_net_u32 (1);
}
- goto out;
- }
- /* cipher then hash */
- iv = payload - iv_sz;
- integ_start_offset = crypto_start_offset - iv_sz - sizeof (esp_header_t);
- integ_total_len += iv_sz + sizeof (esp_header_t);
- flag |= VNET_CRYPTO_OP_FLAG_INIT_IV;
- key_index = sa->linked_key_index;
+ nonce->salt = sa->salt;
+ nonce->iv = *pkt_iv = clib_host_to_net_u64 (sa->ctr_iv_counter++);
+ iv = (u8 *) nonce;
+ }
+ else
+ {
+ iv = payload - iv_sz;
+ flag |= VNET_CRYPTO_OP_FLAG_INIT_IV;
+ }
- if (b != lb)
+ if (lb != b)
{
+ /* chain */
flag |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
- crypto_total_len = esp_encrypt_chain_crypto (vm, ptd, sa, b, lb,
- icv_sz, payload,
- payload_len, 0);
tag = vlib_buffer_get_tail (lb) - icv_sz;
- integ_total_len = esp_encrypt_chain_integ (vm, ptd, sa, b, lb, icv_sz,
- payload - iv_sz -
- sizeof (esp_header_t),
- payload_len + iv_sz +
- sizeof (esp_header_t),
- tag, 0);
+ crypto_total_len = esp_encrypt_chain_crypto (vm, ptd, sa, b, lb, icv_sz,
+ payload, payload_len, 0);
}
- else if (ipsec_sa_is_set_USE_ESN (sa) && !ipsec_sa_is_set_IS_AEAD (sa))
+
+ if (sa->integ_op_id)
{
- u32 seq_hi = clib_net_to_host_u32 (sa->seq_hi);
- clib_memcpy_fast (tag, &seq_hi, sizeof (seq_hi));
- integ_total_len += sizeof (seq_hi);
+ integ_start_offset = crypto_start_offset - iv_sz - sizeof (esp_header_t);
+ integ_total_len += iv_sz + sizeof (esp_header_t);
+
+ if (b != lb)
+ {
+ integ_total_len = esp_encrypt_chain_integ (
+ vm, ptd, sa, b, lb, icv_sz,
+ payload - iv_sz - sizeof (esp_header_t),
+ payload_len + iv_sz + sizeof (esp_header_t), tag, 0);
+ }
+ else if (ipsec_sa_is_set_USE_ESN (sa))
+ {
+ u32 seq_hi = clib_net_to_host_u32 (sa->seq_hi);
+ clib_memcpy_fast (tag, &seq_hi, sizeof (seq_hi));
+ integ_total_len += sizeof (seq_hi);
+ }
}
-out:
return vnet_crypto_async_add_to_frame (vm, async_frame, key_index,
crypto_total_len,
integ_total_len - crypto_total_len,
u32 n_left = frame->n_vectors;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
- esp_gcm_nonce_t nonces[VLIB_FRAME_SIZE], *nonce = nonces;
u32 thread_index = vm->thread_index;
u16 buffer_data_size = vlib_buffer_get_default_data_size (vm);
u32 current_sa_index = ~0, current_sa_packets = 0;
{
esp_prepare_sync_op (vm, ptd, crypto_ops, integ_ops, sa0, payload,
payload_len, iv_sz, icv_sz, bufs, b, lb,
- hdr_len, esp, nonce++);
+ hdr_len, esp);
}
vlib_buffer_advance (b[0], 0LL - hdr_len);
Code Review / vpp.git / blobdiff