diff options
Diffstat (limited to 'ipsec-tools/src/racoon/isakmp_base.c')
| -rw-r--r-- | ipsec-tools/src/racoon/isakmp_base.c | 1394 |
1 files changed, 1394 insertions, 0 deletions
diff --git a/ipsec-tools/src/racoon/isakmp_base.c b/ipsec-tools/src/racoon/isakmp_base.c new file mode 100644 index 00000000..f37d51e0 --- /dev/null +++ b/ipsec-tools/src/racoon/isakmp_base.c @@ -0,0 +1,1394 @@ +/* $NetBSD: isakmp_base.c,v 1.12 2009/03/12 10:57:26 tteras Exp $ */ + +/* $KAME: isakmp_base.c,v 1.49 2003/11/13 02:30:20 sakane Exp $ */ + +/* + * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. + * 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. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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. + */ + +/* Base Exchange (Base Mode) */ + +#include "config.h" + +#include <sys/types.h> +#include <sys/param.h> + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <errno.h> +#if TIME_WITH_SYS_TIME +# include <sys/time.h> +# include <time.h> +#else +# if HAVE_SYS_TIME_H +# include <sys/time.h> +# else +# include <time.h> +# endif +#endif + +#include "var.h" +#include "misc.h" +#include "vmbuf.h" +#include "plog.h" +#include "sockmisc.h" +#include "schedule.h" +#include "debug.h" + +#ifdef ENABLE_HYBRID +#include <resolv.h> +#endif + +#include "localconf.h" +#include "remoteconf.h" +#include "isakmp_var.h" +#include "isakmp.h" +#include "evt.h" +#include "oakley.h" +#include "handler.h" +#include "ipsec_doi.h" +#include "crypto_openssl.h" +#include "pfkey.h" +#include "isakmp_base.h" +#include "isakmp_inf.h" +#include "vendorid.h" +#ifdef ENABLE_NATT +#include "nattraversal.h" +#endif +#ifdef ENABLE_FRAG +#include "isakmp_frag.h" +#endif +#ifdef ENABLE_HYBRID +#include "isakmp_xauth.h" +#include "isakmp_cfg.h" +#endif + +/* %%% + * begin Identity Protection Mode as initiator. + */ +/* + * send to responder + * psk: HDR, SA, Idii, Ni_b + * sig: HDR, SA, Idii, Ni_b + * rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r + * rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i + */ +int +base_i1send(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; /* must be null */ +{ + struct payload_list *plist = NULL; + int error = -1; +#ifdef ENABLE_NATT + vchar_t *vid_natt[MAX_NATT_VID_COUNT] = { NULL }; + int i, vid_natt_i = 0; +#endif +#ifdef ENABLE_FRAG + vchar_t *vid_frag = NULL; +#endif +#ifdef ENABLE_HYBRID + vchar_t *vid_xauth = NULL; + vchar_t *vid_unity = NULL; +#endif +#ifdef ENABLE_DPD + vchar_t *vid_dpd = NULL; +#endif + + + /* validity check */ + if (msg != NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "msg has to be NULL in this function.\n"); + goto end; + } + if (iph1->status != PHASE1ST_START) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* create isakmp index */ + memset(&iph1->index, 0, sizeof(iph1->index)); + isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local); + + /* make ID payload into isakmp status */ + if (ipsecdoi_setid1(iph1) < 0) + goto end; + + /* create SA payload for my proposal */ + iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf, + iph1->rmconf->proposal); + if (iph1->sa == NULL) + goto end; + + /* generate NONCE value */ + iph1->nonce = eay_set_random(iph1->rmconf->nonce_size); + if (iph1->nonce == NULL) + goto end; + +#ifdef ENABLE_HYBRID + /* Do we need Xauth VID? */ + switch (iph1->rmconf->proposal->authmethod) { + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: + if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL) + plog(LLV_ERROR, LOCATION, NULL, + "Xauth vendor ID generation failed\n"); + + if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL) + plog(LLV_ERROR, LOCATION, NULL, + "Unity vendor ID generation failed\n"); + break; + default: + break; + } +#endif +#ifdef ENABLE_FRAG + if (iph1->rmconf->ike_frag) { + vid_frag = set_vendorid(VENDORID_FRAG); + if (vid_frag != NULL) + vid_frag = isakmp_frag_addcap(vid_frag, + VENDORID_FRAG_BASE); + if (vid_frag == NULL) + plog(LLV_ERROR, LOCATION, NULL, + "Frag vendorID construction failed\n"); + } +#endif +#ifdef ENABLE_NATT + /* Is NAT-T support allowed in the config file? */ + if (iph1->rmconf->nat_traversal) { + /* Advertise NAT-T capability */ + memset (vid_natt, 0, sizeof (vid_natt)); +#ifdef VENDORID_NATT_00 + if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_00)) != NULL) + vid_natt_i++; +#endif +#ifdef VENDORID_NATT_02 + if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02)) != NULL) + vid_natt_i++; +#endif +#ifdef VENDORID_NATT_02_N + if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02_N)) != NULL) + vid_natt_i++; +#endif +#ifdef VENDORID_NATT_RFC + if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_RFC)) != NULL) + vid_natt_i++; +#endif + } +#endif + + /* set SA payload to propose */ + plist = isakmp_plist_append(plist, iph1->sa, ISAKMP_NPTYPE_SA); + + /* create isakmp ID payload */ + plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID); + + /* create isakmp NONCE payload */ + plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE); + +#ifdef ENABLE_FRAG + if (vid_frag) + plist = isakmp_plist_append(plist, vid_frag, ISAKMP_NPTYPE_VID); +#endif +#ifdef ENABLE_HYBRID + if (vid_xauth) + plist = isakmp_plist_append(plist, + vid_xauth, ISAKMP_NPTYPE_VID); + if (vid_unity) + plist = isakmp_plist_append(plist, + vid_unity, ISAKMP_NPTYPE_VID); +#endif +#ifdef ENABLE_DPD + if (iph1->rmconf->dpd) { + vid_dpd = set_vendorid(VENDORID_DPD); + if (vid_dpd != NULL) + plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID); + } +#endif +#ifdef ENABLE_NATT + /* set VID payload for NAT-T */ + for (i = 0; i < vid_natt_i; i++) + plist = isakmp_plist_append(plist, vid_natt[i], ISAKMP_NPTYPE_VID); +#endif + iph1->sendbuf = isakmp_plist_set_all (&plist, iph1); + + +#ifdef HAVE_PRINT_ISAKMP_C + isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); +#endif + + /* send the packet, add to the schedule to resend */ + if (isakmp_ph1send(iph1) == -1) + goto end; + + iph1->status = PHASE1ST_MSG1SENT; + + error = 0; + +end: +#ifdef ENABLE_FRAG + if (vid_frag) + vfree(vid_frag); +#endif +#ifdef ENABLE_NATT + for (i = 0; i < vid_natt_i; i++) + vfree(vid_natt[i]); +#endif +#ifdef ENABLE_HYBRID + if (vid_xauth != NULL) + vfree(vid_xauth); + if (vid_unity != NULL) + vfree(vid_unity); +#endif +#ifdef ENABLE_DPD + if (vid_dpd != NULL) + vfree(vid_dpd); +#endif + + return error; +} + +/* + * receive from responder + * psk: HDR, SA, Idir, Nr_b + * sig: HDR, SA, Idir, Nr_b, [ CR ] + * rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i + * rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r + */ +int +base_i2recv(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + vchar_t *pbuf = NULL; + struct isakmp_parse_t *pa; + vchar_t *satmp = NULL; + int error = -1; +#ifdef ENABLE_HYBRID + vchar_t *unity_vid; + vchar_t *xauth_vid; +#endif + + /* validity check */ + if (iph1->status != PHASE1ST_MSG1SENT) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* validate the type of next payload */ + pbuf = isakmp_parse(msg); + if (pbuf == NULL) + goto end; + pa = (struct isakmp_parse_t *)pbuf->v; + + /* SA payload is fixed postion */ + if (pa->type != ISAKMP_NPTYPE_SA) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "received invalid next payload type %d, " + "expecting %d.\n", + pa->type, ISAKMP_NPTYPE_SA); + goto end; + } + if (isakmp_p2ph(&satmp, pa->ptr) < 0) + goto end; + pa++; + + for (/*nothing*/; + pa->type != ISAKMP_NPTYPE_NONE; + pa++) { + + switch (pa->type) { + case ISAKMP_NPTYPE_NONCE: + if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_ID: + if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_VID: + handle_vendorid(iph1, pa->ptr); + break; + default: + /* don't send information, see ident_r1recv() */ + plog(LLV_ERROR, LOCATION, iph1->remote, + "ignore the packet, " + "received unexpecting payload type %d.\n", + pa->type); + goto end; + } + } + + if (iph1->nonce_p == NULL || iph1->id_p == NULL) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "few isakmp message received.\n"); + goto end; + } + + /* verify identifier */ + if (ipsecdoi_checkid1(iph1) != 0) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "invalid ID payload.\n"); + goto end; + } + +#ifdef ENABLE_NATT + if (NATT_AVAILABLE(iph1)) + plog(LLV_INFO, LOCATION, iph1->remote, + "Selected NAT-T version: %s\n", + vid_string_by_id(iph1->natt_options->version)); +#endif + + /* check SA payload and set approval SA for use */ + if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "failed to get valid proposal.\n"); + /* XXX send information */ + goto end; + } + VPTRINIT(iph1->sa_ret); + + iph1->status = PHASE1ST_MSG2RECEIVED; + + error = 0; + +end: + if (pbuf) + vfree(pbuf); + if (satmp) + vfree(satmp); + + if (error) { + VPTRINIT(iph1->nonce_p); + VPTRINIT(iph1->id_p); + } + + return error; +} + +/* + * send to responder + * psk: HDR, KE, HASH_I + * sig: HDR, KE, [ CR, ] [CERT,] SIG_I + * rsa: HDR, KE, HASH_I + * rev: HDR, <KE>Ke_i, HASH_I + */ +int +base_i2send(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + struct payload_list *plist = NULL; + vchar_t *vid = NULL; + int need_cert = 0; + int error = -1; + + /* validity check */ + if (iph1->status != PHASE1ST_MSG2RECEIVED) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* fix isakmp index */ + memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck, + sizeof(cookie_t)); + + /* generate DH public value */ + if (oakley_dh_generate(iph1->approval->dhgrp, + &iph1->dhpub, &iph1->dhpriv) < 0) + goto end; + + /* generate SKEYID to compute hash if not signature mode */ + switch (iph1->approval->authmethod) { + case OAKLEY_ATTR_AUTH_METHOD_RSASIG: + case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: +#endif + break; + default: + if (oakley_skeyid(iph1) < 0) + goto end; + break; + } + + /* generate HASH to send */ + plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n"); + iph1->hash = oakley_ph1hash_base_i(iph1, GENERATE); + if (iph1->hash == NULL) + goto end; + switch (iph1->approval->authmethod) { + case OAKLEY_ATTR_AUTH_METHOD_PSKEY: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: +#endif + vid = set_vendorid(iph1->approval->vendorid); + + /* create isakmp KE payload */ + plist = isakmp_plist_append(plist, iph1->dhpub, ISAKMP_NPTYPE_KE); + + /* create isakmp HASH payload */ + plist = isakmp_plist_append(plist, iph1->hash, ISAKMP_NPTYPE_HASH); + + /* append vendor id, if needed */ + if (vid) + plist = isakmp_plist_append(plist, vid, ISAKMP_NPTYPE_VID); + break; + case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: + case OAKLEY_ATTR_AUTH_METHOD_RSASIG: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: +#endif + /* XXX if there is CR or not ? */ + + if (oakley_getmycert(iph1) < 0) + goto end; + + if (oakley_getsign(iph1) < 0) + goto end; + + if (iph1->cert && iph1->rmconf->send_cert) + need_cert = 1; + + /* create isakmp KE payload */ + plist = isakmp_plist_append(plist, iph1->dhpub, + ISAKMP_NPTYPE_KE); + + /* add CERT payload if there */ + if (need_cert) + plist = isakmp_plist_append(plist, iph1->cert, + ISAKMP_NPTYPE_CERT); + + /* add SIG payload */ + plist = isakmp_plist_append(plist, + iph1->sig, ISAKMP_NPTYPE_SIG); + + break; +#ifdef HAVE_GSSAPI + case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: + /* ... */ + break; +#endif + case OAKLEY_ATTR_AUTH_METHOD_RSAENC: + case OAKLEY_ATTR_AUTH_METHOD_RSAREV: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: +#endif + break; + } + +#ifdef ENABLE_NATT + /* generate NAT-D payloads */ + if (NATT_AVAILABLE(iph1)) + { + vchar_t *natd[2] = { NULL, NULL }; + + plog (LLV_INFO, LOCATION, NULL, "Adding remote and local NAT-D payloads.\n"); + if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "NAT-D hashing failed for %s\n", saddr2str(iph1->remote)); + goto end; + } + + if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "NAT-D hashing failed for %s\n", saddr2str(iph1->local)); + goto end; + } + + plist = isakmp_plist_append(plist, natd[0], iph1->natt_options->payload_nat_d); + plist = isakmp_plist_append(plist, natd[1], iph1->natt_options->payload_nat_d); + } +#endif + + iph1->sendbuf = isakmp_plist_set_all (&plist, iph1); + +#ifdef HAVE_PRINT_ISAKMP_C + isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); +#endif + + /* send the packet, add to the schedule to resend */ + if (isakmp_ph1send(iph1) == -1) + goto end; + + /* the sending message is added to the received-list. */ + if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) { + plog(LLV_ERROR , LOCATION, NULL, + "failed to add a response packet to the tree.\n"); + goto end; + } + + iph1->status = PHASE1ST_MSG2SENT; + + error = 0; + +end: + if (vid) + vfree(vid); + return error; +} + +/* + * receive from responder + * psk: HDR, KE, HASH_R + * sig: HDR, KE, [CERT,] SIG_R + * rsa: HDR, KE, HASH_R + * rev: HDR, <KE>_Ke_r, HASH_R + */ +int +base_i3recv(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + vchar_t *pbuf = NULL; + struct isakmp_parse_t *pa; + int error = -1, ptype; +#ifdef ENABLE_NATT + vchar_t *natd_received; + int natd_seq = 0, natd_verified; +#endif + + /* validity check */ + if (iph1->status != PHASE1ST_MSG2SENT) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* validate the type of next payload */ + pbuf = isakmp_parse(msg); + if (pbuf == NULL) + goto end; + + for (pa = (struct isakmp_parse_t *)pbuf->v; + pa->type != ISAKMP_NPTYPE_NONE; + pa++) { + + switch (pa->type) { + case ISAKMP_NPTYPE_KE: + if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_HASH: + iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr; + break; + case ISAKMP_NPTYPE_CERT: + if (oakley_savecert(iph1, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_SIG: + if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_VID: + handle_vendorid(iph1, pa->ptr); + break; + +#ifdef ENABLE_NATT + case ISAKMP_NPTYPE_NATD_DRAFT: + case ISAKMP_NPTYPE_NATD_RFC: + if (NATT_AVAILABLE(iph1) && iph1->natt_options && + pa->type == iph1->natt_options->payload_nat_d) { + natd_received = NULL; + if (isakmp_p2ph (&natd_received, pa->ptr) < 0) + goto end; + + /* set both bits first so that we can clear them + upon verifying hashes */ + if (natd_seq == 0) + iph1->natt_flags |= NAT_DETECTED; + + /* this function will clear appropriate bits bits + from iph1->natt_flags */ + natd_verified = natt_compare_addr_hash (iph1, + natd_received, natd_seq++); + + plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n", + natd_seq - 1, + natd_verified ? "verified" : "doesn't match"); + + vfree (natd_received); + break; + } + /* passthrough to default... */ +#endif + + default: + /* don't send information, see ident_r1recv() */ + plog(LLV_ERROR, LOCATION, iph1->remote, + "ignore the packet, " + "received unexpecting payload type %d.\n", + pa->type); + goto end; + } + } + +#ifdef ENABLE_NATT + if (NATT_AVAILABLE(iph1)) { + plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n", + iph1->natt_flags & NAT_DETECTED ? + "detected:" : "not detected", + iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "", + iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : ""); + if (iph1->natt_flags & NAT_DETECTED) + natt_float_ports (iph1); + } +#endif + + /* payload existency check */ + /* validate authentication value */ + ptype = oakley_validate_auth(iph1); + if (ptype != 0) { + if (ptype == -1) { + /* message printed inner oakley_validate_auth() */ + goto end; + } + evt_phase1(iph1, EVT_PHASE1_AUTH_FAILED, NULL); + isakmp_info_send_n1(iph1, ptype, NULL); + goto end; + } + + /* compute sharing secret of DH */ + if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub, + iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0) + goto end; + + /* generate SKEYID to compute hash if signature mode */ + switch (iph1->approval->authmethod) { + case OAKLEY_ATTR_AUTH_METHOD_RSASIG: + case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: +#endif + if (oakley_skeyid(iph1) < 0) + goto end; + break; + default: + break; + } + + /* generate SKEYIDs & IV & final cipher key */ + if (oakley_skeyid_dae(iph1) < 0) + goto end; + if (oakley_compute_enckey(iph1) < 0) + goto end; + if (oakley_newiv(iph1) < 0) + goto end; + + /* see handler.h about IV synchronization. */ + memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l); + + /* set encryption flag */ + iph1->flags |= ISAKMP_FLAG_E; + + iph1->status = PHASE1ST_MSG3RECEIVED; + + error = 0; + +end: + if (pbuf) + vfree(pbuf); + + if (error) { + VPTRINIT(iph1->dhpub_p); + VPTRINIT(iph1->cert_p); + VPTRINIT(iph1->crl_p); + VPTRINIT(iph1->sig_p); + } + + return error; +} + +/* + * status update and establish isakmp sa. + */ +int +base_i3send(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + int error = -1; + + /* validity check */ + if (iph1->status != PHASE1ST_MSG3RECEIVED) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + iph1->status = PHASE1ST_ESTABLISHED; + + error = 0; + +end: + return error; +} + +/* + * receive from initiator + * psk: HDR, SA, Idii, Ni_b + * sig: HDR, SA, Idii, Ni_b + * rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r + * rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i + */ +int +base_r1recv(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + vchar_t *pbuf = NULL; + struct isakmp_parse_t *pa; + int error = -1; + int vid_numeric; + + /* validity check */ + if (iph1->status != PHASE1ST_START) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* validate the type of next payload */ + pbuf = isakmp_parse(msg); + if (pbuf == NULL) + goto end; + pa = (struct isakmp_parse_t *)pbuf->v; + + /* check the position of SA payload */ + if (pa->type != ISAKMP_NPTYPE_SA) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "received invalid next payload type %d, " + "expecting %d.\n", + pa->type, ISAKMP_NPTYPE_SA); + goto end; + } + if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0) + goto end; + pa++; + + for (/*nothing*/; + pa->type != ISAKMP_NPTYPE_NONE; + pa++) { + + switch (pa->type) { + case ISAKMP_NPTYPE_NONCE: + if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_ID: + if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_VID: + vid_numeric = handle_vendorid(iph1, pa->ptr); +#ifdef ENABLE_FRAG + if ((vid_numeric == VENDORID_FRAG) && + (vendorid_frag_cap(pa->ptr) & VENDORID_FRAG_BASE)) + iph1->frag = 1; +#endif + break; + default: + /* don't send information, see ident_r1recv() */ + plog(LLV_ERROR, LOCATION, iph1->remote, + "ignore the packet, " + "received unexpecting payload type %d.\n", + pa->type); + goto end; + } + } + + if (iph1->nonce_p == NULL || iph1->id_p == NULL) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "few isakmp message received.\n"); + goto end; + } + + /* verify identifier */ + if (ipsecdoi_checkid1(iph1) != 0) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "invalid ID payload.\n"); + goto end; + } + +#ifdef ENABLE_NATT + if (NATT_AVAILABLE(iph1)) + plog(LLV_INFO, LOCATION, iph1->remote, + "Selected NAT-T version: %s\n", + vid_string_by_id(iph1->natt_options->version)); +#endif + + /* check SA payload and set approval SA for use */ + if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) { + plog(LLV_ERROR, LOCATION, iph1->remote, + "failed to get valid proposal.\n"); + /* XXX send information */ + goto end; + } + + iph1->status = PHASE1ST_MSG1RECEIVED; + + error = 0; + +end: + if (pbuf) + vfree(pbuf); + + if (error) { + VPTRINIT(iph1->sa); + VPTRINIT(iph1->nonce_p); + VPTRINIT(iph1->id_p); + } + + return error; +} + +/* + * send to initiator + * psk: HDR, SA, Idir, Nr_b + * sig: HDR, SA, Idir, Nr_b, [ CR ] + * rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i + * rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r + */ +int +base_r1send(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + struct payload_list *plist = NULL; + int error = -1; +#ifdef ENABLE_NATT + vchar_t *vid_natt = NULL; +#endif +#ifdef ENABLE_HYBRID + vchar_t *vid_xauth = NULL; + vchar_t *vid_unity = NULL; +#endif +#ifdef ENABLE_FRAG + vchar_t *vid_frag = NULL; +#endif +#ifdef ENABLE_DPD + vchar_t *vid_dpd = NULL; +#endif + + /* validity check */ + if (iph1->status != PHASE1ST_MSG1RECEIVED) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* set responder's cookie */ + isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local); + + /* make ID payload into isakmp status */ + if (ipsecdoi_setid1(iph1) < 0) + goto end; + + /* generate NONCE value */ + iph1->nonce = eay_set_random(iph1->rmconf->nonce_size); + if (iph1->nonce == NULL) + goto end; + + /* set SA payload to reply */ + plist = isakmp_plist_append(plist, iph1->sa_ret, ISAKMP_NPTYPE_SA); + + /* create isakmp ID payload */ + plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID); + + /* create isakmp NONCE payload */ + plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE); + +#ifdef ENABLE_NATT + /* has the peer announced nat-t? */ + if (NATT_AVAILABLE(iph1)) + vid_natt = set_vendorid(iph1->natt_options->version); + if (vid_natt) + plist = isakmp_plist_append(plist, vid_natt, ISAKMP_NPTYPE_VID); +#endif +#ifdef ENABLE_HYBRID + if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) { + plog (LLV_INFO, LOCATION, NULL, "Adding xauth VID payload.\n"); + if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "Cannot create Xauth vendor ID\n"); + goto end; + } + plist = isakmp_plist_append(plist, + vid_xauth, ISAKMP_NPTYPE_VID); + } + + if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_UNITY) { + if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "Cannot create Unity vendor ID\n"); + goto end; + } + plist = isakmp_plist_append(plist, + vid_unity, ISAKMP_NPTYPE_VID); + } +#endif +#ifdef ENABLE_DPD + /* + * Only send DPD support if remote announced DPD + * and if DPD support is active + */ + if (iph1->dpd_support && iph1->rmconf->dpd) { + if ((vid_dpd = set_vendorid(VENDORID_DPD)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "DPD vendorID construction failed\n"); + } else { + plist = isakmp_plist_append(plist, vid_dpd, + ISAKMP_NPTYPE_VID); + } + } +#endif +#ifdef ENABLE_FRAG + if (iph1->rmconf->ike_frag) { + if ((vid_frag = set_vendorid(VENDORID_FRAG)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "Frag vendorID construction failed\n"); + } else { + vid_frag = isakmp_frag_addcap(vid_frag, + VENDORID_FRAG_BASE); + plist = isakmp_plist_append(plist, + vid_frag, ISAKMP_NPTYPE_VID); + } + } +#endif + + iph1->sendbuf = isakmp_plist_set_all (&plist, iph1); + +#ifdef HAVE_PRINT_ISAKMP_C + isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); +#endif + + /* send the packet, add to the schedule to resend */ + if (isakmp_ph1send(iph1) == -1) { + iph1 = NULL; + goto end; + } + + /* the sending message is added to the received-list. */ + if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) { + plog(LLV_ERROR , LOCATION, NULL, + "failed to add a response packet to the tree.\n"); + goto end; + } + + iph1->status = PHASE1ST_MSG1SENT; + + error = 0; + +end: +#ifdef ENABLE_NATT + if (vid_natt) + vfree(vid_natt); +#endif +#ifdef ENABLE_HYBRID + if (vid_xauth != NULL) + vfree(vid_xauth); + if (vid_unity != NULL) + vfree(vid_unity); +#endif +#ifdef ENABLE_FRAG + if (vid_frag) + vfree(vid_frag); +#endif +#ifdef ENABLE_DPD + if (vid_dpd) + vfree(vid_dpd); +#endif + + if (iph1 != NULL) + VPTRINIT(iph1->sa_ret); + + return error; +} + +/* + * receive from initiator + * psk: HDR, KE, HASH_I + * sig: HDR, KE, [ CR, ] [CERT,] SIG_I + * rsa: HDR, KE, HASH_I + * rev: HDR, <KE>Ke_i, HASH_I + */ +int +base_r2recv(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + vchar_t *pbuf = NULL; + struct isakmp_parse_t *pa; + int error = -1, ptype; +#ifdef ENABLE_NATT + int natd_seq = 0; +#endif + + /* validity check */ + if (iph1->status != PHASE1ST_MSG1SENT) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* validate the type of next payload */ + pbuf = isakmp_parse(msg); + if (pbuf == NULL) + goto end; + + iph1->pl_hash = NULL; + + for (pa = (struct isakmp_parse_t *)pbuf->v; + pa->type != ISAKMP_NPTYPE_NONE; + pa++) { + + switch (pa->type) { + case ISAKMP_NPTYPE_KE: + if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_HASH: + iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr; + break; + case ISAKMP_NPTYPE_CERT: + if (oakley_savecert(iph1, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_SIG: + if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0) + goto end; + break; + case ISAKMP_NPTYPE_VID: + handle_vendorid(iph1, pa->ptr); + break; + +#ifdef ENABLE_NATT + case ISAKMP_NPTYPE_NATD_DRAFT: + case ISAKMP_NPTYPE_NATD_RFC: + if (pa->type == iph1->natt_options->payload_nat_d) + { + vchar_t *natd_received = NULL; + int natd_verified; + + if (isakmp_p2ph (&natd_received, pa->ptr) < 0) + goto end; + + if (natd_seq == 0) + iph1->natt_flags |= NAT_DETECTED; + + natd_verified = natt_compare_addr_hash (iph1, + natd_received, natd_seq++); + + plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n", + natd_seq - 1, + natd_verified ? "verified" : "doesn't match"); + + vfree (natd_received); + break; + } + /* passthrough to default... */ +#endif + + default: + /* don't send information, see ident_r1recv() */ + plog(LLV_ERROR, LOCATION, iph1->remote, + "ignore the packet, " + "received unexpecting payload type %d.\n", + pa->type); + goto end; + } + } + + /* generate DH public value */ + if (oakley_dh_generate(iph1->approval->dhgrp, + &iph1->dhpub, &iph1->dhpriv) < 0) + goto end; + + /* compute sharing secret of DH */ + if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub, + iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0) + goto end; + + /* generate SKEYID */ + if (oakley_skeyid(iph1) < 0) + goto end; + +#ifdef ENABLE_NATT + if (NATT_AVAILABLE(iph1)) + plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n", + iph1->natt_flags & NAT_DETECTED ? + "detected:" : "not detected", + iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "", + iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : ""); +#endif + + /* payload existency check */ + /* validate authentication value */ + ptype = oakley_validate_auth(iph1); + if (ptype != 0) { + if (ptype == -1) { + /* message printed inner oakley_validate_auth() */ + goto end; + } + evt_phase1(iph1, EVT_PHASE1_AUTH_FAILED, NULL); + isakmp_info_send_n1(iph1, ptype, NULL); + goto end; + } + + iph1->status = PHASE1ST_MSG2RECEIVED; + + error = 0; + +end: + if (pbuf) + vfree(pbuf); + + if (error) { + VPTRINIT(iph1->dhpub_p); + VPTRINIT(iph1->cert_p); + VPTRINIT(iph1->crl_p); + VPTRINIT(iph1->sig_p); + } + + return error; +} + +/* + * send to initiator + * psk: HDR, KE, HASH_R + * sig: HDR, KE, [CERT,] SIG_R + * rsa: HDR, KE, HASH_R + * rev: HDR, <KE>_Ke_r, HASH_R + */ +int +base_r2send(iph1, msg) + struct ph1handle *iph1; + vchar_t *msg; +{ + struct payload_list *plist = NULL; + vchar_t *vid = NULL; + int need_cert = 0; + int error = -1; + + /* validity check */ + if (iph1->status != PHASE1ST_MSG2RECEIVED) { + plog(LLV_ERROR, LOCATION, NULL, + "status mismatched %d.\n", iph1->status); + goto end; + } + + /* generate HASH to send */ + plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n"); + switch (iph1->approval->authmethod) { + case OAKLEY_ATTR_AUTH_METHOD_PSKEY: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: +#endif + case OAKLEY_ATTR_AUTH_METHOD_RSAENC: + case OAKLEY_ATTR_AUTH_METHOD_RSAREV: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: +#endif + iph1->hash = oakley_ph1hash_common(iph1, GENERATE); + break; + case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: + case OAKLEY_ATTR_AUTH_METHOD_RSASIG: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: +#endif +#ifdef HAVE_GSSAPI + case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: +#endif + iph1->hash = oakley_ph1hash_base_r(iph1, GENERATE); + break; + default: + plog(LLV_ERROR, LOCATION, NULL, + "invalid authentication method %d\n", + iph1->approval->authmethod); + goto end; + } + if (iph1->hash == NULL) + goto end; + + switch (iph1->approval->authmethod) { + case OAKLEY_ATTR_AUTH_METHOD_PSKEY: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: +#endif + vid = set_vendorid(iph1->approval->vendorid); + + /* create isakmp KE payload */ + plist = isakmp_plist_append(plist, + iph1->dhpub, ISAKMP_NPTYPE_KE); + + /* create isakmp HASH payload */ + plist = isakmp_plist_append(plist, + iph1->hash, ISAKMP_NPTYPE_HASH); + + /* append vendor id, if needed */ + if (vid) + plist = isakmp_plist_append(plist, + vid, ISAKMP_NPTYPE_VID); + break; + case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: + case OAKLEY_ATTR_AUTH_METHOD_RSASIG: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: + case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: +#endif + /* XXX if there is CR or not ? */ + + if (oakley_getmycert(iph1) < 0) + goto end; + + if (oakley_getsign(iph1) < 0) + goto end; + + if (iph1->cert && iph1->rmconf->send_cert) + need_cert = 1; + + /* create isakmp KE payload */ + plist = isakmp_plist_append(plist, iph1->dhpub, + ISAKMP_NPTYPE_KE); + + /* add CERT payload if there */ + if (need_cert) + plist = isakmp_plist_append(plist, iph1->cert, + ISAKMP_NPTYPE_CERT); + + /* add SIG payload */ + plist = isakmp_plist_append(plist, iph1->sig, + ISAKMP_NPTYPE_SIG); + break; +#ifdef HAVE_GSSAPI + case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: + /* ... */ + break; +#endif + case OAKLEY_ATTR_AUTH_METHOD_RSAENC: + case OAKLEY_ATTR_AUTH_METHOD_RSAREV: +#ifdef ENABLE_HYBRID + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: + case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: +#endif + break; + } + +#ifdef ENABLE_NATT + /* generate NAT-D payloads */ + if (NATT_AVAILABLE(iph1)) { + vchar_t *natd[2] = { NULL, NULL }; + + plog(LLV_INFO, LOCATION, + NULL, "Adding remote and local NAT-D payloads.\n"); + if ((natd[0] = natt_hash_addr(iph1, iph1->remote)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "NAT-D hashing failed for %s\n", + saddr2str(iph1->remote)); + goto end; + } + + if ((natd[1] = natt_hash_addr(iph1, iph1->local)) == NULL) { + plog(LLV_ERROR, LOCATION, NULL, + "NAT-D hashing failed for %s\n", + saddr2str(iph1->local)); + goto end; + } + + plist = isakmp_plist_append(plist, + natd[0], iph1->natt_options->payload_nat_d); + plist = isakmp_plist_append(plist, + natd[1], iph1->natt_options->payload_nat_d); + } +#endif + + iph1->sendbuf = isakmp_plist_set_all(&plist, iph1); + +#ifdef HAVE_PRINT_ISAKMP_C + isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0); +#endif + + /* send HDR;KE;NONCE to responder */ + if (isakmp_send(iph1, iph1->sendbuf) < 0) + goto end; + + /* the sending message is added to the received-list. */ + if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) { + plog(LLV_ERROR , LOCATION, NULL, + "failed to add a response packet to the tree.\n"); + goto end; + } + + /* generate SKEYIDs & IV & final cipher key */ + if (oakley_skeyid_dae(iph1) < 0) + goto end; + if (oakley_compute_enckey(iph1) < 0) + goto end; + if (oakley_newiv(iph1) < 0) + goto end; + + /* set encryption flag */ + iph1->flags |= ISAKMP_FLAG_E; + + iph1->status = PHASE1ST_ESTABLISHED; + + error = 0; + +end: + if (vid) + vfree(vid); + return error; +} |