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 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 bool none_validate_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_sendmsg_respond_to_challenge(struct sk_buff *challenge, 53 struct msghdr *msg) 54 { 55 return -EINVAL; 56 } 57 58 static int none_verify_response(struct rxrpc_connection *conn, 59 struct sk_buff *skb) 60 { 61 return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO, 62 rxrpc_eproto_rxnull_response); 63 } 64 65 static void none_clear(struct rxrpc_connection *conn) 66 { 67 } 68 69 static int none_init(void) 70 { 71 return 0; 72 } 73 74 static void none_exit(void) 75 { 76 } 77 78 /* 79 * RxRPC Kerberos-based security 80 */ 81 const struct rxrpc_security rxrpc_no_security = { 82 .name = "none", 83 .security_index = RXRPC_SECURITY_NONE, 84 .init = none_init, 85 .exit = none_exit, 86 .init_connection_security = none_init_connection_security, 87 .free_call_crypto = none_free_call_crypto, 88 .alloc_txbuf = none_alloc_txbuf, 89 .secure_packet = none_secure_packet, 90 .verify_packet = none_verify_packet, 91 .validate_challenge = none_validate_challenge, 92 .sendmsg_respond_to_challenge = none_sendmsg_respond_to_challenge, 93 .verify_response = none_verify_response, 94 .clear = none_clear, 95 }; 96