**   key                 The string to set as the saved database encryption
**                       key.
*/
void db_set_see_key_page(void){
  Blob key;
  const char *zKey;
  if( db_have_saved_encryption_key() ){
    fossil_errorlog("SEE: encryption key was already set\n");
    return;
  }
  zKey = P("key");
  blob_init(&key, 0, 0);
  if( zKey!=0 ){
    PID_T processId;
    blob_set(&key, zKey);
    db_set_saved_encryption_key(&key);
    processId = db_maybe_handle_saved_encryption_key_for_process(
      SEE_KEY_WRITE
    );
    fossil_errorlog("SEE: set encryption key for process %lu, length %u\n",
                    (unsigned long)processId, blob_size(&key));
  }else{
    fossil_errorlog("SEE: no encryption key specified\n");
  }
  blob_reset(&key);
}

/*
** WEBPAGE: unsetseekey
**
** Sets the saved database encryption key to zeros in the current and parent
** Fossil processes.  This web page does not produce any output on success
** or failure.  Setup permission is required.
*/
void db_unset_see_key_page(void){
  PID_T processId;
  login_check_credentials();
  if( !g.perm.Setup ){ login_needed(0); return; }
  processId = db_maybe_handle_saved_encryption_key_for_process(
    SEE_KEY_ZERO
  );
  fossil_errorlog("SEE: unset encryption key for process %lu\n",
                  (unsigned long)processId);
}

/*
** This function reads the saved database encryption key from the
** specified Fossil parent process.  This is only necessary (or
** functional) on Windows or Linux.
*/