prop224: Add connection and circuit identifier object

Signed-off-by: David Goulet <dgoulet@torproject.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/src/or/hs_ident.c b/src/or/hs_ident.c
new file mode 100644
index 0000000000..5b5dc9aaff
--- /dev/null
+++ b/src/or/hs_ident.c
@@ -0,0 +1,81 @@
+/* Copyright (c) 2017, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file hs_ident.c
+ * \brief Contains circuit and connection identifier code for the whole HS
+ *        subsytem.
+ **/
+
+#include "hs_ident.h"
+
+/* Return a newly allocated circuit identifier. The given public key is copied
+ * identity_pk into the identifier. */
+hs_ident_circuit_t *
+hs_ident_circuit_new(const ed25519_public_key_t *identity_pk,
+                     hs_ident_circuit_type_t circuit_type)
+{
+  tor_assert(circuit_type == HS_IDENT_CIRCUIT_INTRO ||
+             circuit_type == HS_IDENT_CIRCUIT_RENDEZVOUS);
+  hs_ident_circuit_t *ident = tor_malloc_zero(sizeof(*ident));
+  ed25519_pubkey_copy(&ident->identity_pk, identity_pk);
+  ident->circuit_type = circuit_type;
+  return ident;
+}
+
+/* Free the given circuit identifier. */
+void
+hs_ident_circuit_free(hs_ident_circuit_t *ident)
+{
+  if (ident == NULL) {
+    return;
+  }
+  if (ident->auth_key_type == HS_AUTH_KEY_TYPE_LEGACY) {
+    crypto_pk_free(ident->auth_rsa_pk);
+  }
+  memwipe(ident, 0, sizeof(hs_ident_circuit_t));
+  tor_free(ident);
+}
+
+/* For a given directory connection identifier src, return a newly allocated
+ * copy of it. This can't fail. */
+hs_ident_dir_conn_t *
+hs_ident_dir_conn_dup(const hs_ident_dir_conn_t *src)
+{
+  hs_ident_dir_conn_t *ident = tor_malloc_zero(sizeof(*ident));
+  memcpy(ident, src, sizeof(*ident));
+  return ident;
+}
+
+/* Free the given directory connection identifier. */
+void
+hs_ident_dir_conn_free(hs_ident_dir_conn_t *ident)
+{
+  if (ident == NULL) {
+    return;
+  }
+  memwipe(ident, 0, sizeof(hs_ident_dir_conn_t));
+  tor_free(ident);
+}
+
+/* Return a newly allocated edge connection identifier. The given public key
+ * identity_pk is copied into the identifier. */
+hs_ident_edge_conn_t *
+hs_ident_edge_conn_new(const ed25519_public_key_t *identity_pk)
+{
+  hs_ident_edge_conn_t *ident = tor_malloc_zero(sizeof(*ident));
+  ed25519_pubkey_copy(&ident->identity_pk, identity_pk);
+  return ident;
+}
+
+/* Free the given edge connection identifier. */
+void
+hs_ident_edge_conn_free(hs_ident_edge_conn_t *ident)
+{
+  if (ident == NULL) {
+    return;
+  }
+  memwipe(ident, 0, sizeof(hs_ident_edge_conn_t));
+  tor_free(ident);
+}
+