X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fesp.h;h=b1736453b93f97fdc9c293b380376cd8a5c95707;hb=14b804898a5e5b9ec5029d3466621178b85af925;hp=b6942fadf97fa363fb12c1c7ab4343841f6ebcde;hpb=7c22ff72aa54d15484fdc70e0c1b8a9ec5e880e0;p=vpp.git

diff --git a/src/vnet/ipsec/esp.h b/src/vnet/ipsec/esp.h
index b6942fadf97..b1736453b93 100644
--- a/src/vnet/ipsec/esp.h
+++ b/src/vnet/ipsec/esp.h
@@ -21,7 +21,11 @@
 
 typedef struct
 {
-  u32 spi;
+  union
+  {
+    u32 spi;
+    u8 spi_bytes[4];
+  };
   u32 seq;
   u8 data[0];
 } esp_header_t;
@@ -54,10 +58,24 @@ typedef CLIB_PACKED (struct {
 }) ip6_and_esp_header_t;
 /* *INDENT-ON* */
 
+/**
+ * AES GCM Additional Authentication data
+ */
+typedef struct esp_aead_t_
+{
+  /**
+   * for GCM: when using ESN it's:
+   *   SPI, seq-hi, seg-low
+   * else
+   *   SPI, seq-low
+   */
+  u32 data[3];
+} __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	(16)
+#define ESP_MAX_ICV_SIZE	(32)
 
 u8 *format_esp_header (u8 * s, va_list * args);
 
@@ -87,36 +105,29 @@ esp_seq_advance (ipsec_sa_t * sa)
   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 void
+esp_aad_fill (vnet_crypto_op_t * op,
+	      const esp_header_t * esp, const ipsec_sa_t * sa)
 {
-  vnet_crypto_op_t _op, *op = &_op;
-
-  if (PREDICT_FALSE (sa->integ_op_type == 0))
-    return 0;
+  esp_aead_t *aad;
 
-  vnet_crypto_op_init (op, sa->integ_op_type);
-  op->key = sa->integ_key.data;
-  op->key_len = sa->integ_key.len;
-  op->src = data;
-  op->len = data_len;
-  op->dst = signature;
-  op->hmac_trunc_len = sa->integ_icv_size;
+  aad = (esp_aead_t *) op->aad;
+  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] = clib_host_to_net_u32 (sa->seq_hi);
+      aad->data[2] = esp->seq;
+      op->aad_len = 12;
+    }
+  else
+    {
+      /* SPI, seq-low */
+      aad->data[1] = esp->seq;
+      op->aad_len = 8;
     }
-
-  vnet_crypto_process_ops (vm, op, 1);
-  return sa->integ_icv_size;
 }
-
 #endif /* __ESP_H__ */
 
 /*