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, umin(remain, RXRPC_JUMBO_DATALEN), 1, gfp); 23 } 24 25 static int none_secure_packet(struct rxrpc_call *call, struct rxrpc_txbuf *txb) 26 { 27 txb->pkt_len = txb->len; 28 if (txb->len == RXRPC_JUMBO_DATALEN) 29 txb->jumboable = true; 30 return 0; 31 } 32 33 static int none_verify_packet(struct rxrpc_call *call, struct sk_buff *skb) 34 { 35 return 0; 36 } 37 38 static void none_free_call_crypto(struct rxrpc_call *call) 39 { 40 } 41 42 static bool none_validate_challenge(struct rxrpc_connection *conn, 43 struct sk_buff *skb) 44 { 45 rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO, 46 rxrpc_eproto_rxnull_challenge); 47 return true; 48 } 49 50 static int none_sendmsg_respond_to_challenge(struct sk_buff *challenge, 51 struct msghdr *msg) 52 { 53 return -EINVAL; 54 } 55 56 static int none_verify_response(struct rxrpc_connection *conn, 57 struct sk_buff *response_skb, 58 void *response, unsigned int len) 59 { 60 return rxrpc_abort_conn(conn, response_skb, RX_PROTOCOL_ERROR, -EPROTO, 61 rxrpc_eproto_rxnull_response); 62 } 63 64 static void none_clear(struct rxrpc_connection *conn) 65 { 66 } 67 68 static int none_init(void) 69 { 70 return 0; 71 } 72 73 static void none_exit(void) 74 { 75 } 76 77 /* 78 * RxRPC Kerberos-based security 79 */ 80 const struct rxrpc_security rxrpc_no_security = { 81 .name = "none", 82 .security_index = RXRPC_SECURITY_NONE, 83 .init = none_init, 84 .exit = none_exit, 85 .init_connection_security = none_init_connection_security, 86 .free_call_crypto = none_free_call_crypto, 87 .alloc_txbuf = none_alloc_txbuf, 88 .secure_packet = none_secure_packet, 89 .verify_packet = none_verify_packet, 90 .validate_challenge = none_validate_challenge, 91 .sendmsg_respond_to_challenge = none_sendmsg_respond_to_challenge, 92 .verify_response = none_verify_response, 93 .clear = none_clear, 94 }; 95