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 sk_buff *skb, 29 size_t data_size) 30 { 31 return 0; 32 } 33 34 static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb, 35 unsigned int offset, unsigned int len, 36 rxrpc_seq_t seq, u16 expected_cksum) 37 { 38 return 0; 39 } 40 41 static void none_free_call_crypto(struct rxrpc_call *call) 42 { 43 } 44 45 static void none_locate_data(struct rxrpc_call *call, struct sk_buff *skb, 46 unsigned int *_offset, unsigned int *_len) 47 { 48 } 49 50 static int none_respond_to_challenge(struct rxrpc_connection *conn, 51 struct sk_buff *skb, 52 u32 *_abort_code) 53 { 54 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 55 56 trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 57 tracepoint_string("chall_none")); 58 return -EPROTO; 59 } 60 61 static int none_verify_response(struct rxrpc_connection *conn, 62 struct sk_buff *skb, 63 u32 *_abort_code) 64 { 65 struct rxrpc_skb_priv *sp = rxrpc_skb(skb); 66 67 trace_rxrpc_rx_eproto(NULL, sp->hdr.serial, 68 tracepoint_string("resp_none")); 69 return -EPROTO; 70 } 71 72 static void none_clear(struct rxrpc_connection *conn) 73 { 74 } 75 76 static int none_init(void) 77 { 78 return 0; 79 } 80 81 static void none_exit(void) 82 { 83 } 84 85 /* 86 * RxRPC Kerberos-based security 87 */ 88 const struct rxrpc_security rxrpc_no_security = { 89 .name = "none", 90 .security_index = RXRPC_SECURITY_NONE, 91 .init = none_init, 92 .exit = none_exit, 93 .init_connection_security = none_init_connection_security, 94 .free_call_crypto = none_free_call_crypto, 95 .how_much_data = none_how_much_data, 96 .secure_packet = none_secure_packet, 97 .verify_packet = none_verify_packet, 98 .locate_data = none_locate_data, 99 .respond_to_challenge = none_respond_to_challenge, 100 .verify_response = none_verify_response, 101 .clear = none_clear, 102 }; 103