2 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
3 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
4 * Internet Initiative Japan, Inc (IIJ)
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * $FreeBSD: src/usr.sbin/ppp/pap.c,v 1.42.2.4 2002/09/01 02:12:29 brian Exp $
31 #include <sys/param.h>
32 #include <netinet/in.h>
33 #include <netinet/in_systm.h>
34 #include <netinet/ip.h>
35 #include <sys/socket.h>
39 #include <string.h> /* strlen/memcpy */
55 #include "throughput.h"
58 #include "descriptor.h"
61 #include "slcompress.h"
77 static const char * const papcodes[] = {
78 "???", "REQUEST", "SUCCESS", "FAILURE"
80 #define MAXPAPCODE (NELEM(papcodes) - 1)
83 pap_Req(struct authinfo *authp)
85 struct bundle *bundle = authp->physical->dl->bundle;
89 int namelen, keylen, plen;
91 namelen = strlen(bundle->cfg.auth.name);
92 keylen = strlen(bundle->cfg.auth.key);
93 plen = namelen + keylen + 2;
94 log_Printf(LogDEBUG, "pap_Req: namelen = %d, keylen = %d\n", namelen, keylen);
95 log_Printf(LogPHASE, "Pap Output: %s ********\n", bundle->cfg.auth.name);
96 if (*bundle->cfg.auth.name == '\0')
97 log_Printf(LogWARN, "Sending empty PAP authname!\n");
98 lh.code = PAP_REQUEST;
100 lh.length = htons(plen + sizeof(struct fsmheader));
101 bp = m_get(plen + sizeof(struct fsmheader), MB_PAPOUT);
102 memcpy(MBUF_CTOP(bp), &lh, sizeof(struct fsmheader));
103 cp = MBUF_CTOP(bp) + sizeof(struct fsmheader);
105 memcpy(cp, bundle->cfg.auth.name, namelen);
108 memcpy(cp, bundle->cfg.auth.key, keylen);
109 link_PushPacket(&authp->physical->link, bp, bundle,
110 LINK_QUEUES(&authp->physical->link) - 1, PROTO_PAP);
114 SendPapCode(struct authinfo *authp, int code, const char *message)
123 mlen = strlen(message);
125 lh.length = htons(plen + sizeof(struct fsmheader));
126 bp = m_get(plen + sizeof(struct fsmheader), MB_PAPOUT);
127 memcpy(MBUF_CTOP(bp), &lh, sizeof(struct fsmheader));
128 cp = MBUF_CTOP(bp) + sizeof(struct fsmheader);
130 * If our message is longer than 255 bytes, truncate the length to
131 * 255 and send the entire message anyway. Maybe the other end will
132 * display it... (see pap_Input() !)
134 *cp++ = mlen > 255 ? 255 : mlen;
135 memcpy(cp, message, mlen);
136 log_Printf(LogPHASE, "Pap Output: %s\n", papcodes[code]);
138 link_PushPacket(&authp->physical->link, bp, authp->physical->dl->bundle,
139 LINK_QUEUES(&authp->physical->link) - 1, PROTO_PAP);
143 pap_Success(struct authinfo *authp)
145 struct bundle *bundle = authp->physical->dl->bundle;
147 datalink_GotAuthname(authp->physical->dl, authp->in.name);
149 if (*bundle->radius.cfg.file && bundle->radius.repstr)
150 SendPapCode(authp, PAP_ACK, bundle->radius.repstr);
153 SendPapCode(authp, PAP_ACK, "Greetings!!");
154 authp->physical->link.lcp.auth_ineed = 0;
155 if (Enabled(bundle, OPT_UTMP))
156 physical_Login(authp->physical, authp->in.name);
158 if (authp->physical->link.lcp.auth_iwait == 0)
160 * Either I didn't need to authenticate, or I've already been
161 * told that I got the answer right.
163 datalink_AuthOk(authp->physical->dl);
167 pap_Failure(struct authinfo *authp)
169 SendPapCode(authp, PAP_NAK, "Login incorrect");
170 datalink_AuthNotOk(authp->physical->dl);
174 pap_Init(struct authinfo *pap, struct physical *p)
176 auth_Init(pap, p, pap_Req, pap_Success, pap_Failure);
180 pap_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
182 struct physical *p = link2physical(l);
183 struct authinfo *authp = &p->dl->pap;
184 u_char nlen, klen, *key;
189 log_Printf(LogERROR, "pap_Input: Not a physical link - dropped\n");
194 if (bundle_Phase(bundle) != PHASE_NETWORK &&
195 bundle_Phase(bundle) != PHASE_AUTHENTICATE) {
196 log_Printf(LogPHASE, "Unexpected pap input - dropped !\n");
201 if ((bp = auth_ReadHeader(authp, bp)) == NULL &&
202 ntohs(authp->in.hdr.length) == 0) {
203 log_Printf(LogWARN, "Pap Input: Truncated header !\n");
207 if (authp->in.hdr.code == 0 || authp->in.hdr.code > MAXPAPCODE) {
208 log_Printf(LogPHASE, "Pap Input: %d: Bad PAP code !\n", authp->in.hdr.code);
213 if (authp->in.hdr.code != PAP_REQUEST && authp->id != authp->in.hdr.id &&
214 Enabled(bundle, OPT_IDCHECK)) {
215 /* Wrong conversation dude ! */
216 log_Printf(LogPHASE, "Pap Input: %s dropped (got id %d, not %d)\n",
217 papcodes[authp->in.hdr.code], authp->in.hdr.id, authp->id);
221 m_settype(bp, MB_PAPIN);
222 authp->id = authp->in.hdr.id; /* We respond with this id */
225 bp = mbuf_Read(bp, &nlen, 1);
226 if (authp->in.hdr.code == PAP_ACK) {
228 * Don't restrict the length of our acknowledgement freetext to
229 * nlen (a one-byte length). Show the rest of the ack packet
230 * instead. This isn't really part of the protocol.....
234 txtlen = m_length(bp);
236 bp = auth_ReadName(authp, bp, nlen);
237 txt = authp->in.name;
238 txtlen = strlen(authp->in.name);
245 log_Printf(LogPHASE, "Pap Input: %s (%.*s)\n",
246 papcodes[authp->in.hdr.code], txtlen, txt);
248 switch (authp->in.hdr.code) {
251 log_Printf(LogPHASE, "Pap Input: No key given !\n");
254 bp = mbuf_Read(bp, &klen, 1);
255 if (m_length(bp) < klen) {
256 log_Printf(LogERROR, "Pap Input: Truncated key !\n");
259 if ((key = malloc(klen+1)) == NULL) {
260 log_Printf(LogERROR, "Pap Input: Out of memory !\n");
263 bp = mbuf_Read(bp, key, klen);
267 if (*bundle->radius.cfg.file) {
268 if (!radius_Authenticate(&bundle->radius, authp, authp->in.name,
269 key, strlen(key), NULL, 0))
273 if (auth_Validate(bundle, authp->in.name, key))
282 auth_StopTimer(authp);
283 if (p->link.lcp.auth_iwait == PROTO_PAP) {
284 p->link.lcp.auth_iwait = 0;
285 if (p->link.lcp.auth_ineed == 0)
287 * We've succeeded in our ``login''
288 * If we're not expecting the peer to authenticate (or he already
289 * has), proceed to network phase.
291 datalink_AuthOk(p->dl);
296 auth_StopTimer(authp);
297 datalink_AuthNotOk(p->dl);