summaryrefslogtreecommitdiff
path: root/keyexchange/isakmpd-20041012/dnssec.c
diff options
context:
space:
mode:
Diffstat (limited to 'keyexchange/isakmpd-20041012/dnssec.c')
-rw-r--r--keyexchange/isakmpd-20041012/dnssec.c293
1 files changed, 0 insertions, 293 deletions
diff --git a/keyexchange/isakmpd-20041012/dnssec.c b/keyexchange/isakmpd-20041012/dnssec.c
deleted file mode 100644
index b7ee75f..0000000
--- a/keyexchange/isakmpd-20041012/dnssec.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/* $OpenBSD: dnssec.c,v 1.20 2004/06/14 09:55:41 ho Exp $ */
-
-/*
- * Copyright (c) 2001 Håkan Olsson. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#include <arpa/inet.h>
-#include <stdlib.h>
-
-#include <openssl/rsa.h>
-
-#ifdef LWRES
-#include <lwres/netdb.h>
-#include <dns/keyvalues.h>
-#else
-#include <netdb.h>
-#endif
-
-#include "sysdep.h"
-
-#include "dnssec.h"
-#include "exchange.h"
-#include "ipsec_num.h"
-#include "libcrypto.h"
-#include "log.h"
-#include "message.h"
-#include "transport.h"
-#include "util.h"
-
-#ifndef DNS_UFQDN_SEPARATOR
-#define DNS_UFQDN_SEPARATOR "._ipsec."
-#endif
-
-/* adapted from <dns/rdatastruct.h> / RFC 2535 */
-struct dns_rdata_key {
- u_int16_t flags;
- u_int8_t protocol;
- u_int8_t algorithm;
- u_int16_t datalen;
- unsigned char *data;
-};
-
-void *
-dns_get_key(int type, struct message *msg, int *keylen)
-{
- struct exchange *exchange = msg->exchange;
- struct rrsetinfo *rr;
- struct dns_rdata_key key_rr;
- char name[MAXHOSTNAMELEN];
- in_addr_t ip4;
- u_int8_t algorithm, *id, *umark;
- size_t id_len;
- int ret, i;
-
- switch (type) {
- case IKE_AUTH_RSA_SIG:
- algorithm = DNS_KEYALG_RSA;
- break;
-
- case IKE_AUTH_RSA_ENC:
- case IKE_AUTH_RSA_ENC_REV:
- /* XXX Not yet. */
- /* algorithm = DNS_KEYALG_RSA; */
- return 0;
-
- case IKE_AUTH_DSS:
- /* XXX Not yet. */
- /* algorithm = DNS_KEYALG_DSS; */
- return 0;
-
- case IKE_AUTH_PRE_SHARED:
- default:
- return 0;
- }
-
- id = exchange->initiator ? exchange->id_r : exchange->id_i;
- id_len = exchange->initiator ? exchange->id_r_len : exchange->id_i_len;
- memset(name, 0, sizeof name);
-
- if (!id || id_len == 0) {
- log_print("dns_get_key: ID is missing");
- return 0;
- }
- /* Exchanges (and SAs) don't carry the ID in ISAKMP form */
- id -= ISAKMP_GEN_SZ;
- id_len += ISAKMP_GEN_SZ - ISAKMP_ID_DATA_OFF;
-
- switch (GET_ISAKMP_ID_TYPE(id)) {
- case IPSEC_ID_IPV4_ADDR:
- /* We want to lookup a KEY RR in the reverse zone. */
- if (id_len < sizeof ip4)
- return 0;
- memcpy(&ip4, id + ISAKMP_ID_DATA_OFF, sizeof ip4);
- snprintf(name, sizeof name, "%d.%d.%d.%d.in-addr.arpa.", ip4
- >> 24, (ip4 >> 16) & 0xFF, (ip4 >> 8) & 0xFF, ip4 & 0xFF);
- break;
-
- case IPSEC_ID_IPV6_ADDR:
- /* XXX Not yet. */
- return 0;
- break;
-
- case IPSEC_ID_FQDN:
- if ((id_len + 1) >= sizeof name)
- return 0;
- /* ID is not NULL-terminated. Add trailing dot and NULL. */
- memcpy(name, id + ISAKMP_ID_DATA_OFF, id_len);
- *(name + id_len) = '.';
- *(name + id_len + 1) = '\0';
- break;
-
- case IPSEC_ID_USER_FQDN:
- /*
- * Some special handling here. We want to convert the ID
- * 'user@host.domain' string into 'user._ipsec.host.domain.'.
- */
- if ((id_len + sizeof(DNS_UFQDN_SEPARATOR)) >= sizeof name)
- return 0;
- /* Look for the '@' separator. */
- for (umark = id + ISAKMP_ID_DATA_OFF; (umark - id) < id_len;
- umark++)
- if (*umark == '@')
- break;
- if (*umark != '@') {
- LOG_DBG((LOG_MISC, 50, "dns_get_key: bad UFQDN ID"));
- return 0;
- }
- *umark++ = '\0';
- /* id is now terminated. 'umark', however, is not. */
- snprintf(name, sizeof name, "%s%s", id + ISAKMP_ID_DATA_OFF,
- DNS_UFQDN_SEPARATOR);
- memcpy(name + strlen(name), umark, id_len - strlen(id) - 1);
- *(name + id_len + sizeof(DNS_UFQDN_SEPARATOR) - 2) = '.';
- *(name + id_len + sizeof(DNS_UFQDN_SEPARATOR) - 1) = '\0';
- break;
-
- default:
- return 0;
- }
-
- LOG_DBG((LOG_MISC, 50, "dns_get_key: trying KEY RR for %s", name));
- ret = getrrsetbyname(name, C_IN, T_KEY, 0, &rr);
-
- if (ret) {
- LOG_DBG((LOG_MISC, 30, "dns_get_key: no DNS responses "
- "(error %d)", ret));
- return 0;
- }
- LOG_DBG((LOG_MISC, 80,
- "dns_get_key: rrset class %d type %d ttl %d nrdatas %d nrsigs %d",
- rr->rri_rdclass, rr->rri_rdtype, rr->rri_ttl, rr->rri_nrdatas,
- rr->rri_nsigs));
-
- /* We don't accept unvalidated data. */
- if (!(rr->rri_flags & RRSET_VALIDATED)) {
- LOG_DBG((LOG_MISC, 10, "dns_get_key: "
- "got unvalidated response"));
- freerrset(rr);
- return 0;
- }
- /* Sanity. */
- if (rr->rri_nrdatas == 0 || rr->rri_rdtype != T_KEY) {
- LOG_DBG((LOG_MISC, 30, "dns_get_key: no KEY RRs received"));
- freerrset(rr);
- return 0;
- }
- memset(&key_rr, 0, sizeof key_rr);
-
- /*
- * Find a key with the wanted algorithm, if any.
- * XXX If there are several keys present, we currently only find the
- * first.
- */
- for (i = 0; i < rr->rri_nrdatas && key_rr.datalen == 0; i++) {
- key_rr.flags = ntohs((u_int16_t) * rr->rri_rdatas[i].rdi_data);
- key_rr.protocol = *(rr->rri_rdatas[i].rdi_data + 2);
- key_rr.algorithm = *(rr->rri_rdatas[i].rdi_data + 3);
-
- if (key_rr.protocol != DNS_KEYPROTO_IPSEC) {
- LOG_DBG((LOG_MISC, 50, "dns_get_key: ignored "
- "non-IPsec key"));
- continue;
- }
- if (key_rr.algorithm != algorithm) {
- LOG_DBG((LOG_MISC, 50, "dns_get_key: ignored "
- "key with other alg"));
- continue;
- }
- key_rr.datalen = rr->rri_rdatas[i].rdi_length - 4;
- if (key_rr.datalen <= 0) {
- LOG_DBG((LOG_MISC, 50, "dns_get_key: "
- "ignored bad key"));
- key_rr.datalen = 0;
- continue;
- }
- /* This key seems to fit our requirements... */
- key_rr.data = (char *)malloc(key_rr.datalen);
- if (!key_rr.data) {
- log_error("dns_get_key: malloc (%d) failed",
- key_rr.datalen);
- freerrset(rr);
- return 0;
- }
- memcpy(key_rr.data, rr->rri_rdatas[i].rdi_data + 4,
- key_rr.datalen);
- *keylen = key_rr.datalen;
- }
-
- freerrset(rr);
-
- if (key_rr.datalen)
- return key_rr.data;
- return 0;
-}
-
-int
-dns_RSA_dns_to_x509(u_int8_t *key, int keylen, RSA **rsa_key)
-{
- RSA *rsa;
- int key_offset;
- u_int8_t e_len;
-
- if (!key || keylen <= 0) {
- log_print("dns_RSA_dns_to_x509: invalid public key");
- return -1;
- }
- rsa = RSA_new();
- if (rsa == NULL) {
- log_error("dns_RSA_dns_to_x509: "
- "failed to allocate new RSA struct");
- return -1;
- }
- e_len = *key;
- key_offset = 1;
-
- if (e_len == 0) {
- if (keylen < 3) {
- log_print("dns_RSA_dns_to_x509: invalid public key");
- RSA_free(rsa);
- return -1;
- }
- e_len = *(key + key_offset++) << 8;
- e_len += *(key + key_offset++);
- }
- if (e_len > (keylen - key_offset)) {
- log_print("dns_RSA_dns_to_x509: invalid public key");
- RSA_free(rsa);
- return -1;
- }
- rsa->e = BN_bin2bn(key + key_offset, e_len, NULL);
- key_offset += e_len;
-
- /* XXX if (keylen <= key_offset) -> "invalid public key" ? */
-
- rsa->n = BN_bin2bn(key + key_offset, keylen - key_offset, NULL);
-
- *rsa_key = rsa;
-
- LOG_DBG((LOG_MISC, 30, "dns_RSA_dns_to_x509: got %d bits RSA key",
- BN_num_bits(rsa->n)));
- return 0;
-}
-
-#if notyet
-int
-dns_RSA_x509_to_dns(RSA *rsa_key, u_int8_t *key, int *keylen)
-{
- return 0;
-}
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-14 15:14:15 +0000