public static void authenticate()

in src/main/java/org/apache/accumulo/testing/randomwalk/security/Authenticate.java [42:91]
43 lines of code
15 McCabe index (conditional complexity)

  public static void authenticate(String principal, AuthenticationToken token, State state,
      RandWalkEnv env, Properties props) throws Exception {
    String targetProp = props.getProperty("target");
    boolean success = Boolean.parseBoolean(props.getProperty("valid"));

    try (AccumuloClient client = env.createClient(principal, token)) {

      String target;

      if (targetProp.equals("table")) {
        target = WalkingSecurity.get(state, env).getTabUserName();
      } else {
        target = WalkingSecurity.get(state, env).getSysUserName();
      }
      boolean exists = WalkingSecurity.get(state, env).userExists(target);
      // Copy so if failed it doesn't mess with the password stored in state
      byte[] password = Arrays.copyOf(WalkingSecurity.get(state, env).getUserPassword(target),
          WalkingSecurity.get(state, env).getUserPassword(target).length);
      boolean hasPermission =
          client.securityOperations().hasSystemPermission(principal, SystemPermission.SYSTEM)
              || principal.equals(target);

      if (!success)
        for (int i = 0; i < password.length; i++)
          password[i]++;

      boolean result;

      try {
        result = client.securityOperations().authenticateUser(target, new PasswordToken(password));
      } catch (AccumuloSecurityException ae) {
        switch (ae.getSecurityErrorCode()) {
          case PERMISSION_DENIED:
            if (exists && hasPermission)
              throw new AccumuloException(
                  "Got a security exception when I should have had permission.", ae);
            else
              return;
          default:
            throw new AccumuloException("Unexpected exception!", ae);
        }
      }
      if (!hasPermission)
        throw new AccumuloException("Didn't get Security Exception when we should have");
      if (result != (success && exists))
        throw new AccumuloException("Authentication " + (result ? "succeeded" : "failed")
            + " when it should have " + ((success && exists) ? "succeeded" : "failed")
            + " while the user exists? " + exists);
    }
  }