fix(core): Session key derivation index

Author: vrockz747

common/core/core_session.c

@@ -91,7 +91,7 @@
  * GLOBAL VARIABLES
  *****************************************************************************/
 const ecdsa_curve *curve;
-const uint32_t session_key_rotation[2] = {6, 7};
+const uint32_t session_key_rotation[1] = {0};
 session_config_t CONFIDENTIAL session = {0};
 
 /*****************************************************************************
@@ -225,9 +225,6 @@ static bool derive_server_public_key() {
   uint8_t index = 0;
   hdnode_public_ckd(&node, session_key_rotation[index]);
 
-  index += 1;
-  hdnode_public_ckd(&node, session_key_rotation[index]);
-
   memcpy(
       session.derived_server_public_key, node.public_key, SESSION_PUB_KEY_SIZE);
 

common/core/core_session.h

@@ -38,7 +38,7 @@
 #define SESSION_IV_SIZE 16
 #define SESSION_KEY_SIZE 32
 
-extern const uint32_t session_key_rotation[2];
+extern const uint32_t session_key_rotation[1];
 
 typedef enum {
   SESSION_OK = 0,