X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fesp.h;h=2f734aa05ce65fbc0a71e06f8c90caab01f7edc2;hb=1e3aa5e213c23588981ee17d1413a0441a40527a;hp=98db70179bd2b9b858ee5951d0507747210bfcd7;hpb=db93cd971320301eb21403caabada7a3ec6a4cce;p=vpp.git

diff --git a/src/vnet/ipsec/esp.h b/src/vnet/ipsec/esp.h
index 98db70179bd..2f734aa05ce 100644
--- a/src/vnet/ipsec/esp.h
+++ b/src/vnet/ipsec/esp.h
@@ -16,12 +16,9 @@
 #define __ESP_H__
 
 #include <vnet/ip/ip.h>
+#include <vnet/crypto/crypto.h>
 #include <vnet/ipsec/ipsec.h>
 
-#include <openssl/hmac.h>
-#include <openssl/rand.h>
-#include <openssl/evp.h>
-
 typedef struct
 {
   u32 spi;
@@ -42,6 +39,14 @@ typedef CLIB_PACKED (struct {
 }) 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;
@@ -49,173 +54,22 @@ typedef CLIB_PACKED (struct {
 }) ip6_and_esp_header_t;
 /* *INDENT-ON* */
 
-typedef struct
-{
-  const EVP_CIPHER *type;
-} esp_crypto_alg_t;
-
-typedef struct
-{
-  const EVP_MD *md;
-  u8 trunc_size;
-} esp_integ_alg_t;
-
-typedef struct
-{
-  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
-  EVP_CIPHER_CTX encrypt_ctx;
-    CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
-  EVP_CIPHER_CTX decrypt_ctx;
-    CLIB_CACHE_LINE_ALIGN_MARK (cacheline2);
-  HMAC_CTX hmac_ctx;
-  ipsec_crypto_alg_t last_encrypt_alg;
-  ipsec_crypto_alg_t last_decrypt_alg;
-  ipsec_integ_alg_t last_integ_alg;
-} esp_main_per_thread_data_t;
-
-typedef struct
-{
-  esp_crypto_alg_t *esp_crypto_algs;
-  esp_integ_alg_t *esp_integ_algs;
-  esp_main_per_thread_data_t *per_thread_data;
-} esp_main_t;
-
-esp_main_t esp_main;
-
-#define ESP_WINDOW_SIZE		(64)
-#define ESP_SEQ_MAX 		(4294967295UL)
+#define ESP_SEQ_MAX		(4294967295UL)
+#define ESP_MAX_BLOCK_SIZE	(16)
+#define ESP_MAX_ICV_SIZE	(16)
 
 u8 *format_esp_header (u8 * s, va_list * args);
 
-always_inline int
-esp_replay_check (ipsec_sa_t * sa, u32 seq)
-{
-  u32 diff;
-
-  if (PREDICT_TRUE (seq > sa->last_seq))
-    return 0;
-
-  diff = sa->last_seq - seq;
-
-  if (ESP_WINDOW_SIZE > diff)
-    return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
-  else
-    return 1;
-
-  return 0;
-}
-
-always_inline int
-esp_replay_check_esn (ipsec_sa_t * sa, u32 seq)
-{
-  u32 tl = sa->last_seq;
-  u32 th = sa->last_seq_hi;
-  u32 diff = tl - seq;
-
-  if (PREDICT_TRUE (tl >= (ESP_WINDOW_SIZE - 1)))
-    {
-      if (seq >= (tl - ESP_WINDOW_SIZE + 1))
-	{
-	  sa->seq_hi = th;
-	  if (seq <= tl)
-	    return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
-	  else
-	    return 0;
-	}
-      else
-	{
-	  sa->seq_hi = th + 1;
-	  return 0;
-	}
-    }
-  else
-    {
-      if (seq >= (tl - ESP_WINDOW_SIZE + 1))
-	{
-	  sa->seq_hi = th - 1;
-	  return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
-	}
-      else
-	{
-	  sa->seq_hi = th;
-	  if (seq <= tl)
-	    return (sa->replay_window & (1ULL << diff)) ? 1 : 0;
-	  else
-	    return 0;
-	}
-    }
-
-  return 0;
-}
-
 /* TODO seq increment should be atomic to be accessed by multiple workers */
-always_inline void
-esp_replay_advance (ipsec_sa_t * sa, u32 seq)
-{
-  u32 pos;
-
-  if (seq > sa->last_seq)
-    {
-      pos = seq - sa->last_seq;
-      if (pos < ESP_WINDOW_SIZE)
-	sa->replay_window = ((sa->replay_window) << pos) | 1;
-      else
-	sa->replay_window = 1;
-      sa->last_seq = seq;
-    }
-  else
-    {
-      pos = sa->last_seq - seq;
-      sa->replay_window |= (1ULL << pos);
-    }
-}
-
-always_inline void
-esp_replay_advance_esn (ipsec_sa_t * sa, u32 seq)
-{
-  int wrap = sa->seq_hi - sa->last_seq_hi;
-  u32 pos;
-
-  if (wrap == 0 && seq > sa->last_seq)
-    {
-      pos = seq - sa->last_seq;
-      if (pos < ESP_WINDOW_SIZE)
-	sa->replay_window = ((sa->replay_window) << pos) | 1;
-      else
-	sa->replay_window = 1;
-      sa->last_seq = seq;
-    }
-  else if (wrap > 0)
-    {
-      pos = ~seq + sa->last_seq + 1;
-      if (pos < ESP_WINDOW_SIZE)
-	sa->replay_window = ((sa->replay_window) << pos) | 1;
-      else
-	sa->replay_window = 1;
-      sa->last_seq = seq;
-      sa->last_seq_hi = sa->seq_hi;
-    }
-  else if (wrap < 0)
-    {
-      pos = ~seq + sa->last_seq + 1;
-      sa->replay_window |= (1ULL << pos);
-    }
-  else
-    {
-      pos = sa->last_seq - seq;
-      sa->replay_window |= (1ULL << pos);
-    }
-}
-
 always_inline int
 esp_seq_advance (ipsec_sa_t * sa)
 {
-  if (PREDICT_TRUE (sa->use_esn))
+  if (PREDICT_TRUE (ipsec_sa_is_set_USE_ESN (sa)))
     {
       if (PREDICT_FALSE (sa->seq == ESP_SEQ_MAX))
 	{
-	  if (PREDICT_FALSE
-	      (sa->use_anti_replay && sa->seq_hi == ESP_SEQ_MAX))
+	  if (PREDICT_FALSE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa) &&
+			     sa->seq_hi == ESP_SEQ_MAX))
 	    return 1;
 	  sa->seq_hi++;
 	}
@@ -223,7 +77,8 @@ esp_seq_advance (ipsec_sa_t * sa)
     }
   else
     {
-      if (PREDICT_FALSE (sa->use_anti_replay && sa->seq == ESP_SEQ_MAX))
+      if (PREDICT_FALSE (ipsec_sa_is_set_USE_ANTI_REPLAY (sa) &&
+			 sa->seq == ESP_SEQ_MAX))
 	return 1;
       sa->seq++;
     }
@@ -231,86 +86,34 @@ esp_seq_advance (ipsec_sa_t * sa)
   return 0;
 }
 
-always_inline void
-esp_init ()
-{
-  esp_main_t *em = &esp_main;
-  vlib_thread_main_t *tm = vlib_get_thread_main ();
-
-  memset (em, 0, sizeof (em[0]));
-
-  vec_validate (em->esp_crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
-  em->esp_crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].type = EVP_aes_128_cbc ();
-  em->esp_crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].type = EVP_aes_192_cbc ();
-  em->esp_crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].type = EVP_aes_256_cbc ();
-
-  vec_validate (em->esp_integ_algs, IPSEC_INTEG_N_ALG - 1);
-  esp_integ_alg_t *i;
-
-  i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA1_96];
-  i->md = EVP_sha1 ();
-  i->trunc_size = 12;
-
-  i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
-  i->md = EVP_sha256 ();
-  i->trunc_size = 12;
-
-  i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
-  i->md = EVP_sha256 ();
-  i->trunc_size = 16;
-
-  i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
-  i->md = EVP_sha384 ();
-  i->trunc_size = 24;
-
-  i = &em->esp_integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
-  i->md = EVP_sha512 ();
-  i->trunc_size = 32;
-
-  vec_validate_aligned (em->per_thread_data, tm->n_vlib_mains - 1,
-			CLIB_CACHE_LINE_BYTES);
-  int thread_id;
-
-  for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
-    {
-      EVP_CIPHER_CTX_init (&(em->per_thread_data[thread_id].encrypt_ctx));
-      EVP_CIPHER_CTX_init (&(em->per_thread_data[thread_id].decrypt_ctx));
-      HMAC_CTX_init (&(em->per_thread_data[thread_id].hmac_ctx));
-    }
-}
 
 always_inline unsigned int
-hmac_calc (ipsec_integ_alg_t alg,
-	   u8 * key,
-	   int key_len,
-	   u8 * data, int data_len, u8 * signature, u8 use_esn, u32 seq_hi)
+hmac_calc (vlib_main_t * vm, ipsec_sa_t * sa, u8 * data, int data_len,
+	   u8 * signature)
 {
-  esp_main_t *em = &esp_main;
-  u32 thread_index = vlib_get_thread_index ();
-  HMAC_CTX *ctx = &(em->per_thread_data[thread_index].hmac_ctx);
-  const EVP_MD *md = NULL;
-  unsigned int len;
-
-  ASSERT (alg < IPSEC_INTEG_N_ALG);
+  vnet_crypto_op_t _op, *op = &_op;
 
-  if (PREDICT_FALSE (em->esp_integ_algs[alg].md == 0))
+  if (PREDICT_FALSE (sa->integ_op_type == 0))
     return 0;
 
-  if (PREDICT_FALSE (alg != em->per_thread_data[thread_index].last_integ_alg))
-    {
-      md = em->esp_integ_algs[alg].md;
-      em->per_thread_data[thread_index].last_integ_alg = alg;
-    }
-
-  HMAC_Init (ctx, key, key_len, md);
+  op->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_trunc_size;
 
-  HMAC_Update (ctx, data, data_len);
+  if (ipsec_sa_is_set_USE_ESN (sa))
+    {
+      u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
 
-  if (PREDICT_TRUE (use_esn))
-    HMAC_Update (ctx, (u8 *) & seq_hi, sizeof (seq_hi));
-  HMAC_Final (ctx, signature, &len);
+      op->len += 4;
+      clib_memcpy (data + data_len, &seq_hi, 4);
+    }
 
-  return em->esp_integ_algs[alg].trunc_size;
+  vnet_crypto_process_ops (vm, op, 1);
+  return sa->integ_trunc_size;
 }
 
 #endif /* __ESP_H__ */