2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
5 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
6 * Internet Initiative Japan, Inc (IIJ)
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/param.h>
34 #include <netinet/in.h>
35 #include <netinet/in_systm.h>
36 #include <netinet/ip.h>
37 #include <sys/socket.h>
41 #include <string.h> /* strlen/memcpy */
57 #include "throughput.h"
60 #include "descriptor.h"
63 #include "slcompress.h"
79 static const char * const papcodes[] = {
80 "???", "REQUEST", "SUCCESS", "FAILURE"
82 #define MAXPAPCODE (sizeof papcodes / sizeof papcodes[0] - 1)
85 pap_Req(struct authinfo *authp)
87 struct bundle *bundle = authp->physical->dl->bundle;
91 int namelen, keylen, plen;
93 namelen = strlen(bundle->cfg.auth.name);
94 keylen = strlen(bundle->cfg.auth.key);
95 plen = namelen + keylen + 2;
96 log_Printf(LogDEBUG, "pap_Req: namelen = %d, keylen = %d\n", namelen, keylen);
97 log_Printf(LogPHASE, "Pap Output: %s ********\n", bundle->cfg.auth.name);
98 if (*bundle->cfg.auth.name == '\0')
99 log_Printf(LogWARN, "Sending empty PAP authname!\n");
100 lh.code = PAP_REQUEST;
102 lh.length = htons(plen + sizeof(struct fsmheader));
103 bp = m_get(plen + sizeof(struct fsmheader), MB_PAPOUT);
104 memcpy(MBUF_CTOP(bp), &lh, sizeof(struct fsmheader));
105 cp = MBUF_CTOP(bp) + sizeof(struct fsmheader);
107 memcpy(cp, bundle->cfg.auth.name, namelen);
110 memcpy(cp, bundle->cfg.auth.key, keylen);
111 link_PushPacket(&authp->physical->link, bp, bundle,
112 LINK_QUEUES(&authp->physical->link) - 1, PROTO_PAP);
116 SendPapCode(struct authinfo *authp, int code, const char *message)
125 mlen = strlen(message);
127 lh.length = htons(plen + sizeof(struct fsmheader));
128 bp = m_get(plen + sizeof(struct fsmheader), MB_PAPOUT);
129 memcpy(MBUF_CTOP(bp), &lh, sizeof(struct fsmheader));
130 cp = MBUF_CTOP(bp) + sizeof(struct fsmheader);
132 * If our message is longer than 255 bytes, truncate the length to
133 * 255 and send the entire message anyway. Maybe the other end will
134 * display it... (see pap_Input() !)
136 *cp++ = mlen > 255 ? 255 : mlen;
137 memcpy(cp, message, mlen);
138 log_Printf(LogPHASE, "Pap Output: %s\n", papcodes[code]);
140 link_PushPacket(&authp->physical->link, bp, authp->physical->dl->bundle,
141 LINK_QUEUES(&authp->physical->link) - 1, PROTO_PAP);
145 pap_Success(struct authinfo *authp)
147 struct bundle *bundle = authp->physical->dl->bundle;
149 datalink_GotAuthname(authp->physical->dl, authp->in.name);
151 if (*bundle->radius.cfg.file && bundle->radius.repstr)
152 SendPapCode(authp, PAP_ACK, bundle->radius.repstr);
155 SendPapCode(authp, PAP_ACK, "Greetings!!");
156 authp->physical->link.lcp.auth_ineed = 0;
157 if (Enabled(bundle, OPT_UTMP))
158 physical_Login(authp->physical, authp->in.name);
160 if (authp->physical->link.lcp.auth_iwait == 0)
162 * Either I didn't need to authenticate, or I've already been
163 * told that I got the answer right.
165 datalink_AuthOk(authp->physical->dl);
169 pap_Failure(struct authinfo *authp)
171 SendPapCode(authp, PAP_NAK, "Login incorrect");
172 datalink_AuthNotOk(authp->physical->dl);
176 pap_Init(struct authinfo *pap, struct physical *p)
178 auth_Init(pap, p, pap_Req, pap_Success, pap_Failure);
182 pap_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
184 struct physical *p = link2physical(l);
185 struct authinfo *authp = &p->dl->pap;
186 u_char nlen, klen, *key;
191 log_Printf(LogERROR, "pap_Input: Not a physical link - dropped\n");
196 if (bundle_Phase(bundle) != PHASE_NETWORK &&
197 bundle_Phase(bundle) != PHASE_AUTHENTICATE) {
198 log_Printf(LogPHASE, "Unexpected pap input - dropped !\n");
203 if ((bp = auth_ReadHeader(authp, bp)) == NULL &&
204 ntohs(authp->in.hdr.length) == 0) {
205 log_Printf(LogWARN, "Pap Input: Truncated header !\n");
209 if (authp->in.hdr.code == 0 || authp->in.hdr.code > MAXPAPCODE) {
210 log_Printf(LogPHASE, "Pap Input: %d: Bad PAP code !\n", authp->in.hdr.code);
215 if (authp->in.hdr.code != PAP_REQUEST && authp->id != authp->in.hdr.id &&
216 Enabled(bundle, OPT_IDCHECK)) {
217 /* Wrong conversation dude ! */
218 log_Printf(LogPHASE, "Pap Input: %s dropped (got id %d, not %d)\n",
219 papcodes[authp->in.hdr.code], authp->in.hdr.id, authp->id);
223 m_settype(bp, MB_PAPIN);
224 authp->id = authp->in.hdr.id; /* We respond with this id */
227 bp = mbuf_Read(bp, &nlen, 1);
228 if (authp->in.hdr.code == PAP_ACK) {
230 * Don't restrict the length of our acknowledgement freetext to
231 * nlen (a one-byte length). Show the rest of the ack packet
232 * instead. This isn't really part of the protocol.....
236 txtlen = m_length(bp);
238 bp = auth_ReadName(authp, bp, nlen);
239 txt = authp->in.name;
240 txtlen = strlen(authp->in.name);
247 log_Printf(LogPHASE, "Pap Input: %s (%.*s)\n",
248 papcodes[authp->in.hdr.code], txtlen, txt);
250 switch (authp->in.hdr.code) {
253 log_Printf(LogPHASE, "Pap Input: No key given !\n");
256 bp = mbuf_Read(bp, &klen, 1);
257 if (m_length(bp) < klen) {
258 log_Printf(LogERROR, "Pap Input: Truncated key !\n");
261 if ((key = malloc(klen+1)) == NULL) {
262 log_Printf(LogERROR, "Pap Input: Out of memory !\n");
265 bp = mbuf_Read(bp, key, klen);
269 if (*bundle->radius.cfg.file) {
270 if (!radius_Authenticate(&bundle->radius, authp, authp->in.name,
271 key, strlen(key), NULL, 0))
275 if (auth_Validate(bundle, authp->in.name, key))
284 auth_StopTimer(authp);
285 if (p->link.lcp.auth_iwait == PROTO_PAP) {
286 p->link.lcp.auth_iwait = 0;
287 if (p->link.lcp.auth_ineed == 0)
289 * We've succeeded in our ``login''
290 * If we're not expecting the peer to authenticate (or he already
291 * has), proceed to network phase.
293 datalink_AuthOk(p->dl);
298 auth_StopTimer(authp);
299 datalink_AuthNotOk(p->dl);