net/rxrpc/insecure.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* Null security operations.
   3  *
   4  * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
   5  * Written by David Howells (dhowells@redhat.com)
   6  */
   7
   8 #include <net/af_rxrpc.h>
   9 #include "ar-internal.h"
  10
  11 static int none_init_connection_security(struct rxrpc_connection *conn,
  12                                          struct rxrpc_key_token *token)
  13 {
  14         return 0;
  15 }
  16
  17 /*
  18  * Work out how much data we can put in an unsecured packet.
  19  */
  20 static int none_how_much_data(struct rxrpc_call *call, size_t remain,
  21                                size_t *_buf_size, size_t *_data_size, size_t *_offset)
  22 {
  23         *_buf_size = *_data_size = min_t(size_t, remain, RXRPC_JUMBO_DATALEN);
  24         *_offset = 0;
  25         return 0;
  26 }
  27
  28 static int none_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
  29 {
  30         return 0;
  31 }
  32
  33 static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb)
  34 {
  35         struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
  36
  37         sp->flags |= RXRPC_RX_VERIFIED;
  38         return 0;
  39 }
  40
  41 static void none_free_call_crypto(struct rxrpc_call *call)
  42 {
  43 }
  44
  45 static int none_respond_to_challenge(struct rxrpc_connection *conn,
  46                                      struct sk_buff *skb)
  47 {
  48         return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO,
  49                                 rxrpc_eproto_rxnull_challenge);
  50 }
  51
  52 static int none_verify_response(struct rxrpc_connection *conn,
  53                                 struct sk_buff *skb)
  54 {
  55         return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO,
  56                                 rxrpc_eproto_rxnull_response);
  57 }
  58
  59 static void none_clear(struct rxrpc_connection *conn)
  60 {
  61 }
  62
  63 static int none_init(void)
  64 {
  65         return 0;
  66 }
  67
  68 static void none_exit(void)
  69 {
  70 }
  71
  72 /*
  73  * RxRPC Kerberos-based security
  74  */
  75 const struct rxrpc_security rxrpc_no_security = {
  76         .name                           = "none",
  77         .security_index                 = RXRPC_SECURITY_NONE,
  78         .init                           = none_init,
  79         .exit                           = none_exit,
  80         .init_connection_security       = none_init_connection_security,
  81         .free_call_crypto               = none_free_call_crypto,
  82         .how_much_data                  = none_how_much_data,
  83         .secure_packet                  = none_secure_packet,
  84         .verify_packet                  = none_verify_packet,
  85         .respond_to_challenge           = none_respond_to_challenge,
  86         .verify_response                = none_verify_response,
  87         .clear                          = none_clear,
  88 };