crypto: introduce crypto infra

Change-Id: Ibf320b3e7b054b686f3af9a55afd5d5bda9b1048
Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>

1 files changed, 127 insertions, 0 deletions

diff --git a/src/vnet/crypto/crypto.c b/src/vnet/crypto/crypto.c
new file mode 100644
index 00000000000..a6f45be053f
--- /dev/null
+++ b/src/vnet/crypto/crypto.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdbool.h>
+#include <vlib/vlib.h>
+#include <vnet/crypto/crypto.h>
+
+vnet_crypto_main_t crypto_main;
+
+u32
+vnet_crypto_process_ops (vlib_main_t * vm, vnet_crypto_op_t ops[], u32 n_ops)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  u32 rv = 0, i;
+
+  for (i = 0; i < n_ops; i++)
+    {
+      vnet_crypto_op_type_t opt = ops[i].op;
+      vnet_crypto_op_t *opp = &ops[i];
+
+      if (cm->ops_handlers[opt])
+	rv += (cm->ops_handlers[opt]) (vm, &opp, 1);
+      else
+	ops[i].status = VNET_CRYPTO_OP_STATUS_FAIL_NO_HANDLER;
+    }
+
+  return rv;
+}
+
+u32
+vnet_crypto_register_engine (vlib_main_t * vm, char *name, int prio,
+			     char *desc)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *p;
+
+  vec_add2 (cm->engines, p, 1);
+  p->name = name;
+  p->desc = desc;
+  p->priority = prio;
+
+  return p - cm->engines;
+}
+
+vlib_error_t *
+vnet_crypto_register_ops_handler (vlib_main_t * vm, u32 engine_index,
+				  vnet_crypto_op_type_t opt,
+				  vnet_crypto_ops_handler_t * fn)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *ae, *e = vec_elt_at_index (cm->engines, engine_index);
+  vnet_crypto_op_type_data_t *otd = cm->opt_data + opt;
+  vec_validate_aligned (cm->ops_handlers, VNET_CRYPTO_N_OP_TYPES - 1,
+			CLIB_CACHE_LINE_BYTES);
+  e->ops_handlers[opt] = fn;
+
+  if (otd->active_engine_index == ~0)
+    {
+      otd->active_engine_index = engine_index;
+      cm->ops_handlers[opt] = fn;
+      return 0;
+    }
+  ae = vec_elt_at_index (cm->engines, otd->active_engine_index);
+  if (ae->priority < e->priority)
+    {
+      otd->active_engine_index = engine_index;
+      cm->ops_handlers[opt] = fn;
+    }
+
+  return 0;
+}
+
+clib_error_t *
+vnet_crypto_init (vlib_main_t * vm)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  const char *enc = "encrypt";
+  const char *dec = "decrypt";
+  const char *hmac = "hmac";
+
+  vec_validate_aligned (cm->threads, tm->n_vlib_mains, CLIB_CACHE_LINE_BYTES);
+  vec_validate (cm->algs, VNET_CRYPTO_N_ALGS);
+
+#define _(n, s) \
+  cm->algs[VNET_CRYPTO_ALG_##n].name = s; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_ENC].alg = VNET_CRYPTO_ALG_##n; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_DEC].alg = VNET_CRYPTO_ALG_##n; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_ENC].desc = enc; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_DEC].desc = dec; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_ENC].active_engine_index = ~0; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_DEC].active_engine_index = ~0;
+  foreach_crypto_alg;
+#undef _
+
+#define _(n, s) \
+  cm->algs[VNET_CRYPTO_ALG_##n].name = s; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_HMAC].alg = VNET_CRYPTO_ALG_##n; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_HMAC].desc = hmac; \
+  cm->opt_data[VNET_CRYPTO_OP_##n##_HMAC].active_engine_index = ~0;
+  foreach_hmac_alg;
+#undef _
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (vnet_crypto_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */