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  * Allocate an appropriately sized buffer for the amount of data remaining.
  19  */
  20 static struct rxrpc_txbuf *none_alloc_txbuf(struct rxrpc_call *call, size_t remain, gfp_t gfp)
  21 {
  22         return rxrpc_alloc_data_txbuf(call, min_t(size_t, remain, RXRPC_JUMBO_DATALEN), 1, gfp);
  23 }
  24
  25 static int none_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb)
  26 {
  27         return 0;
  28 }
  29
  30 static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb)
  31 {
  32         struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
  33
  34         sp->flags |= RXRPC_RX_VERIFIED;
  35         return 0;
  36 }
  37
  38 static void none_free_call_crypto(struct rxrpc_call *call)
  39 {
  40 }
  41
  42 static int none_respond_to_challenge(struct rxrpc_connection *conn,
  43                                      struct sk_buff *skb)
  44 {
  45         return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO,
  46                                 rxrpc_eproto_rxnull_challenge);
  47 }
  48
  49 static int none_verify_response(struct rxrpc_connection *conn,
  50                                 struct sk_buff *skb)
  51 {
  52         return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO,
  53                                 rxrpc_eproto_rxnull_response);
  54 }
  55
  56 static void none_clear(struct rxrpc_connection *conn)
  57 {
  58 }
  59
  60 static int none_init(void)
  61 {
  62         return 0;
  63 }
  64
  65 static void none_exit(void)
  66 {
  67 }
  68
  69 /*
  70  * RxRPC Kerberos-based security
  71  */
  72 const struct rxrpc_security rxrpc_no_security = {
  73         .name                           = "none",
  74         .security_index                 = RXRPC_SECURITY_NONE,
  75         .init                           = none_init,
  76         .exit                           = none_exit,
  77         .init_connection_security       = none_init_connection_security,
  78         .free_call_crypto               = none_free_call_crypto,
  79         .alloc_txbuf                    = none_alloc_txbuf,
  80         .secure_packet                  = none_secure_packet,
  81         .verify_packet                  = none_verify_packet,
  82         .respond_to_challenge           = none_respond_to_challenge,
  83         .verify_response                = none_verify_response,
  84         .clear                          = none_clear,
  85 };