1 /* $OpenBSD: ike_main_mode.c,v 1.19 2018/01/15 09:54:48 mpi Exp $ */ 2 /* $EOM: ike_main_mode.c,v 1.77 1999/04/25 22:12:34 niklas Exp $ */ 3 4 /* 5 * Copyright (c) 1998, 1999 Niklas Hallqvist. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * This code was written under funding by Ericsson Radio Systems. 30 */ 31 32 #include <sys/types.h> 33 #include <netinet/in.h> 34 #include <stdlib.h> 35 #include <string.h> 36 37 #include "attribute.h" 38 #include "conf.h" 39 #include "constants.h" 40 #include "crypto.h" 41 #include "dh.h" 42 #include "doi.h" 43 #include "exchange.h" 44 #include "hash.h" 45 #include "ike_auth.h" 46 #include "ike_main_mode.h" 47 #include "ike_phase_1.h" 48 #include "ipsec.h" 49 #include "ipsec_doi.h" 50 #include "isakmp.h" 51 #include "log.h" 52 #include "message.h" 53 #include "prf.h" 54 #include "sa.h" 55 #include "transport.h" 56 #include "util.h" 57 58 static int initiator_send_ID_AUTH(struct message *); 59 static int responder_send_ID_AUTH(struct message *); 60 static int responder_send_KE_NONCE(struct message *); 61 62 int (*ike_main_mode_initiator[]) (struct message *) = { 63 ike_phase_1_initiator_send_SA, 64 ike_phase_1_initiator_recv_SA, 65 ike_phase_1_initiator_send_KE_NONCE, 66 ike_phase_1_initiator_recv_KE_NONCE, 67 initiator_send_ID_AUTH, 68 ike_phase_1_recv_ID_AUTH 69 }; 70 71 int (*ike_main_mode_responder[]) (struct message *) = { 72 ike_phase_1_responder_recv_SA, 73 ike_phase_1_responder_send_SA, 74 ike_phase_1_recv_KE_NONCE, 75 responder_send_KE_NONCE, 76 ike_phase_1_recv_ID_AUTH, 77 responder_send_ID_AUTH 78 }; 79 80 static int 81 initiator_send_ID_AUTH(struct message *msg) 82 { 83 msg->exchange->flags |= EXCHANGE_FLAG_ENCRYPT; 84 85 if (ike_phase_1_send_ID(msg)) 86 return -1; 87 88 if (ike_phase_1_send_AUTH(msg)) 89 return -1; 90 91 return ipsec_initial_contact(msg); 92 } 93 94 /* Send our public DH value and a nonce to the initiator. */ 95 int 96 responder_send_KE_NONCE(struct message *msg) 97 { 98 /* XXX Should we really just use the initiator's nonce size? */ 99 if (ike_phase_1_send_KE_NONCE(msg, msg->exchange->nonce_i_len)) 100 return -1; 101 102 /* 103 * Calculate DH values & key material in parallel with the message 104 * going on a roundtrip over the wire. 105 */ 106 message_register_post_send(msg, 107 (void (*)(struct message *))ike_phase_1_post_exchange_KE_NONCE); 108 109 return 0; 110 } 111 112 static int 113 responder_send_ID_AUTH(struct message *msg) 114 { 115 msg->exchange->flags |= EXCHANGE_FLAG_ENCRYPT; 116 117 if (ike_phase_1_responder_send_ID_AUTH(msg)) 118 return -1; 119 120 return ipsec_initial_contact(msg); 121 } 122