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 u32 *_abort_code) 48 { 49 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 50 51 trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 52 tracepoint_string("chall_none")); 53 return -EPROTO; 54 } 55 56 static int none_verify_response(struct rxrpc_connection *conn, 57 struct sk_buff *skb, 58 u32 *_abort_code) 59 { 60 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 61 62 trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 63 tracepoint_string("resp_none")); 64 return -EPROTO; 65 } 66 67 static void none_clear(struct rxrpc_connection *conn) 68 { 69 } 70 71 static int none_init(void) 72 { 73 return 0; 74 } 75 76 static void none_exit(void) 77 { 78 } 79 80 /* 81 * RxRPC Kerberos-based security 82 */ 83 const struct rxrpc_security rxrpc_no_security = { 84 .name = "none", 85 .security_index = RXRPC_SECURITY_NONE, 86 .init = none_init, 87 .exit = none_exit, 88 .init_connection_security = none_init_connection_security, 89 .free_call_crypto = none_free_call_crypto, 90 .how_much_data = none_how_much_data, 91 .secure_packet = none_secure_packet, 92 .verify_packet = none_verify_packet, 93 .respond_to_challenge = none_respond_to_challenge, 94 .verify_response = none_verify_response, 95 .clear = none_clear, 96 }; 97