static struct mbuf *
proto_LayerPull(struct bundle *b, struct link *l, struct mbuf *bp,
u_short *proto)
{
u_char cp[2];
size_t got;
if ((got = mbuf_View(bp, cp, 2)) == 0) {
m_freem(bp);
return NULL;
}
*proto = cp[0];
if (!(*proto & 1)) {
if (got == 1) {
m_freem(bp);
return NULL;
}
bp = mbuf_Read(bp, cp, 2);
*proto = (*proto << 8) | cp[1];
} else
bp = mbuf_Read(bp, cp, 1);
log_Printf(LogDEBUG, "proto_LayerPull: unknown -> 0x%04x\n", *proto);
m_settype(bp, MB_PROTOIN);
link_ProtocolRecord(l, *proto, PROTO_IN);
return bp;
}
static struct mbuf *
acf_LayerPull(struct bundle *b, struct link *l, struct mbuf *bp, u_short *proto)
{
struct physical *p = link2physical(l);
u_char cp[2];
if (!p) {
log_Printf(LogERROR, "Can't Pull an acf packet from a logical link\n");
return bp;
}
if (mbuf_View(bp, cp, 2) == 2) {
if (!p->link.lcp.want_acfcomp) {
/* We expect the packet not to be compressed */
bp = mbuf_Read(bp, cp, 2);
if (cp[0] != HDLC_ADDR) {
p->hdlc.lqm.ifInErrors++;
p->hdlc.stats.badaddr++;
log_Printf(LogDEBUG, "acf_LayerPull: addr 0x%02x\n", cp[0]);
m_freem(bp);
return NULL;
}
if (cp[1] != HDLC_UI) {
p->hdlc.lqm.ifInErrors++;
p->hdlc.stats.badcommand++;
log_Printf(LogDEBUG, "acf_LayerPull: control 0x%02x\n", cp[1]);
m_freem(bp);
return NULL;
}
m_settype(bp, MB_ACFIN);
} else if (cp[0] == HDLC_ADDR && cp[1] == HDLC_UI) {
/*
* We can receive compressed packets, but the peer still sends
* uncompressed packets (or maybe this is a PROTO_LCP packet) !
*/
bp = mbuf_Read(bp, cp, 2);
m_settype(bp, MB_ACFIN);
}
}
return bp;
}
int
ipv6cp_PushPacket(struct ipv6cp *ipv6cp, struct link *l)
{
struct bundle *bundle = ipv6cp->fsm.bundle;
struct mqueue *queue;
struct mbuf *bp;
int m_len;
u_int32_t secs = 0;
unsigned alivesecs = 0;
if (ipv6cp->fsm.state != ST_OPENED)
return 0;
/*
* If ccp is not open but is required, do nothing.
*/
if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) {
log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name);
return 0;
}
queue = ipv6cp->Queue + IPV6CP_QUEUES(ipv6cp) - 1;
do {
if (queue->top) {
bp = m_dequeue(queue);
bp = mbuf_Read(bp, &secs, sizeof secs);
bp = m_pullup(bp);
m_len = m_length(bp);
if (!FilterCheck(MBUF_CTOP(bp), AF_INET6, &bundle->filter.alive,
&alivesecs)) {
if (secs == 0)
secs = alivesecs;
bundle_StartIdleTimer(bundle, secs);
}
link_PushPacket(l, bp, bundle, 0, PROTO_IPV6);
ipv6cp_AddOutOctets(ipv6cp, m_len);
return 1;
}
} while (queue-- != ipv6cp->Queue);
return 0;
}
struct mbuf *
auth_ReadName(struct authinfo *authp, struct mbuf *bp, size_t len)
{
if (len > sizeof authp->in.name - 1)
log_Printf(LogWARN, "auth_ReadName: Name too long (%zu) !\n", len);
else {
size_t mlen = m_length(bp);
if (len > mlen)
log_Printf(LogWARN, "auth_ReadName: Short packet (%zu > %zu) !\n",
len, mlen);
else {
bp = mbuf_Read(bp, (u_char *)authp->in.name, len);
authp->in.name[len] = '\0';
return bp;
}
}
*authp->in.name = '\0';
m_freem(bp);
return NULL;
}
struct mbuf *
auth_ReadHeader(struct authinfo *authp, struct mbuf *bp)
{
size_t len;
len = m_length(bp);
if (len >= sizeof authp->in.hdr) {
bp = mbuf_Read(bp, (u_char *)&authp->in.hdr, sizeof authp->in.hdr);
if (len >= ntohs(authp->in.hdr.length))
return bp;
authp->in.hdr.length = htons(0);
log_Printf(LogWARN, "auth_ReadHeader: Short packet (%u > %zu) !\n",
ntohs(authp->in.hdr.length), len);
} else {
authp->in.hdr.length = htons(0);
log_Printf(LogWARN, "auth_ReadHeader: Short packet header (%u > %zu) !\n",
(int)(sizeof authp->in.hdr), len);
}
m_freem(bp);
return NULL;
}
struct mbuf *
lqr_RecvEcho(struct fsm *fp, struct mbuf *bp)
{
struct hdlc *hdlc = &link2physical(fp->link)->hdlc;
struct lcp *lcp = fsm2lcp(fp);
struct echolqr lqr;
if (m_length(bp) >= sizeof lqr) {
m_freem(mbuf_Read(bp, &lqr, sizeof lqr));
bp = NULL;
lqr.magic = ntohl(lqr.magic);
lqr.signature = ntohl(lqr.signature);
lqr.sequence = ntohl(lqr.sequence);
/* Tolerate echo replies with either magic number */
if (lqr.magic != 0 && lqr.magic != lcp->his_magic &&
lqr.magic != lcp->want_magic) {
log_Printf(LogWARN, "%s: lqr_RecvEcho: Bad magic: expected 0x%08x,"
" got 0x%08x\n", fp->link->name, lcp->his_magic, lqr.magic);
/*
* XXX: We should send a terminate request. But poor implementations may
* die as a result.
*/
}
if (lqr.signature == SIGNATURE
|| lqr.signature == lcp->want_magic) { /* some implementations return the wrong magic */
/* careful not to update lqm.echo.seq_recv with older values */
if ((hdlc->lqm.echo.seq_recv > (u_int32_t)0 - 5 && lqr.sequence < 5) ||
(hdlc->lqm.echo.seq_recv <= (u_int32_t)0 - 5 &&
lqr.sequence > hdlc->lqm.echo.seq_recv))
hdlc->lqm.echo.seq_recv = lqr.sequence;
} else
log_Printf(LogWARN, "lqr_RecvEcho: Got sig 0x%08lx, not 0x%08lx !\n",
(u_long)lqr.signature, (u_long)SIGNATURE);
} else
log_Printf(LogWARN, "lqr_RecvEcho: Got packet size %zd, expecting %ld !\n",
m_length(bp), (long)sizeof(struct echolqr));
return bp;
}
struct mbuf *
chap_Input_old(struct bundle *bundle, struct link *l, struct mbuf *bp)
{
struct physical *p = link2physical(l);
struct chap *chap = &p->dl->chap;
char *name, *key, *ans;
int len, nlen;
u_char alen;
#ifdef HAVE_DES
int lanman;
#endif
if (p == NULL) {
log_Printf(LogERROR, "chap_Input: Not a physical link - dropped\n");
m_freem(bp);
return NULL;
}
if (bundle_Phase(bundle) != PHASE_NETWORK &&
bundle_Phase(bundle) != PHASE_AUTHENTICATE) {
log_Printf(LogPHASE, "Unexpected chap input - dropped !\n");
m_freem(bp);
return NULL;
}
m_settype(bp, MB_CHAPIN);
if ((bp = auth_ReadHeader(&chap->auth, bp)) == NULL &&
ntohs(chap->auth.in.hdr.length) == 0)
log_Printf(LogWARN, "Chap Input: Truncated header !\n");
else if (chap->auth.in.hdr.code == 0 || chap->auth.in.hdr.code > MAXCHAPCODE)
log_Printf(LogPHASE, "Chap Input: %d: Bad CHAP code !\n",
chap->auth.in.hdr.code);
else {
len = m_length(bp);
ans = NULL;
if (chap->auth.in.hdr.code != CHAP_CHALLENGE &&
chap->auth.id != chap->auth.in.hdr.id &&
Enabled(bundle, OPT_IDCHECK)) {
/* Wrong conversation dude ! */
log_Printf(LogPHASE, "Chap Input: %s dropped (got id %d, not %d)\n",
chapcodes[chap->auth.in.hdr.code], chap->auth.in.hdr.id,
chap->auth.id);
m_freem(bp);
return NULL;
}
chap->auth.id = chap->auth.in.hdr.id; /* We respond with this id */
#ifdef HAVE_DES
lanman = 0;
#endif
switch (chap->auth.in.hdr.code) {
case CHAP_CHALLENGE:
bp = mbuf_Read(bp, &alen, 1);
len -= alen + 1; /* len -= (alen + 1); */
if (len < 0) {
log_Printf(LogERROR, "Chap Input: Truncated challenge !\n");
m_freem(bp);
return NULL;
}
*chap->challenge.peer = alen;
bp = mbuf_Read(bp, chap->challenge.peer + 1, alen);
bp = auth_ReadName(&chap->auth, bp, len);
#ifdef HAVE_DES
lanman = p->link.lcp.his_authtype == 0x80 &&
((chap->NTRespSent && IsAccepted(p->link.lcp.cfg.chap80lm)) ||
!IsAccepted(p->link.lcp.cfg.chap80nt));
#endif
break;
case CHAP_RESPONSE:
auth_StopTimer(&chap->auth);
bp = mbuf_Read(bp, &alen, 1); /* read HASH-Size */
len -= alen + 1; /* len -= (alen + 1);, len is length of Name Field */
if (len < 0) {
log_Printf(LogERROR, "Chap Input: Truncated response !\n");
m_freem(bp);
return NULL;
}
if ((ans = malloc(alen + 2)) == NULL) {
log_Printf(LogERROR, "Chap Input: Out of memory !\n");
m_freem(bp);
return NULL;
}
*ans = chap->auth.id;
bp = mbuf_Read(bp, ans + 1, alen); /* cut HASH value */
ans[alen+1] = '\0'; /* ans is (id, HASH, \0)*/
bp = auth_ReadName(&chap->auth, bp, len);
#ifdef HAVE_DES
lanman = alen == 49 && ans[alen] == 0;
#endif
break;
case CHAP_SUCCESS:
case CHAP_FAILURE:
/* chap->auth.in.name is already set up at CHALLENGE time */
if ((ans = malloc(len + 1)) == NULL) {
log_Printf(LogERROR, "Chap Input: Out of memory !\n");
m_freem(bp);
return NULL;
}
bp = mbuf_Read(bp, ans, len);
ans[len] = '\0';
break;
}
switch (chap->auth.in.hdr.code) {
case CHAP_CHALLENGE:
case CHAP_RESPONSE:
if (*chap->auth.in.name)
log_Printf(LogPHASE, "Chap Input: %s (%d bytes from %s%s)\n",
chapcodes[chap->auth.in.hdr.code], alen,
chap->auth.in.name,
#ifdef HAVE_DES
lanman && chap->auth.in.hdr.code == CHAP_RESPONSE ?
" - lanman" :
#endif
"");
else
log_Printf(LogPHASE, "Chap Input: %s (%d bytes%s)\n",
chapcodes[chap->auth.in.hdr.code], alen,
#ifdef HAVE_DES
lanman && chap->auth.in.hdr.code == CHAP_RESPONSE ?
" - lanman" :
#endif
"");
break;
case CHAP_SUCCESS:
case CHAP_FAILURE:
if (*ans)
log_Printf(LogPHASE, "Chap Input: %s (%s)\n",
chapcodes[chap->auth.in.hdr.code], ans);
else
log_Printf(LogPHASE, "Chap Input: %s\n",
chapcodes[chap->auth.in.hdr.code]);
break;
}
switch (chap->auth.in.hdr.code) {
case CHAP_CHALLENGE:
if (*bundle->cfg.auth.key == '!' && bundle->cfg.auth.key[1] != '!')
chap_StartChild(chap, bundle->cfg.auth.key + 1,
bundle->cfg.auth.name);
else
chap_Respond(chap, bundle->cfg.auth.name, bundle->cfg.auth.key +
(*bundle->cfg.auth.key == '!' ? 1 : 0),
p->link.lcp.his_authtype
#ifdef HAVE_DES
, lanman
#endif
);
break;
case CHAP_RESPONSE:
name = chap->auth.in.name;
nlen = strlen(name);
#ifndef NORADIUS
if (*bundle->radius.cfg.file) {
u_char end;
end = chap->challenge.local[*chap->challenge.local+1];
chap->challenge.local[*chap->challenge.local+1] = '\0';
radius_Authenticate(&bundle->radius, &chap->auth,
chap->auth.in.name, ans,
chap->challenge.local + 1);
chap->challenge.local[*chap->challenge.local+1] = end;
} else
#endif
{
key = auth_GetSecret(bundle, name, nlen, p);
if (key) {
char *myans;
#ifdef HAVE_DES
if (lanman && !IsEnabled(p->link.lcp.cfg.chap80lm)) {
log_Printf(LogPHASE, "Auth failure: LANMan not enabled\n");
if (chap_HaveAnotherGo(chap))
break;
key = NULL;
} else if (!lanman && !IsEnabled(p->link.lcp.cfg.chap80nt) &&
p->link.lcp.want_authtype == 0x80) {
log_Printf(LogPHASE, "Auth failure: mschap not enabled\n");
if (chap_HaveAnotherGo(chap))
break;
key = NULL;
} else
#endif
{
myans = chap_BuildAnswer(name, key, chap->auth.id,
chap->challenge.local,
p->link.lcp.want_authtype
#ifdef HAVE_DES
, lanman
#endif
);
if (myans == NULL)
key = NULL;
else {
if (!chap_Cmp(p->link.lcp.want_authtype, myans + 1, *myans,
ans + 1, alen
#ifdef HAVE_DES
, lanman
#endif
))
key = NULL;
free(myans);
}
}
}
if (key)
chap_Success(&chap->auth);
else
chap_Failure(&chap->auth);
}
break;
case CHAP_SUCCESS:
if (p->link.lcp.auth_iwait == PROTO_CHAP) {
p->link.lcp.auth_iwait = 0;
if (p->link.lcp.auth_ineed == 0)
/*
* We've succeeded in our ``login''
* If we're not expecting the peer to authenticate (or he already
* has), proceed to network phase.
*/
datalink_AuthOk(p->dl);
}
break;
case CHAP_FAILURE:
datalink_AuthNotOk(p->dl);
break;
}
free(ans);
}
m_freem(bp);
return NULL;
}
struct mbuf *
pap_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
{
struct physical *p = link2physical(l);
struct authinfo *authp = &p->dl->pap;
u_char nlen, klen, *key;
const char *txt;
int txtlen;
if (p == NULL) {
log_Printf(LogERROR, "pap_Input: Not a physical link - dropped\n");
m_freem(bp);
return NULL;
}
if (bundle_Phase(bundle) != PHASE_NETWORK &&
bundle_Phase(bundle) != PHASE_AUTHENTICATE) {
log_Printf(LogPHASE, "Unexpected pap input - dropped !\n");
m_freem(bp);
return NULL;
}
if ((bp = auth_ReadHeader(authp, bp)) == NULL &&
ntohs(authp->in.hdr.length) == 0) {
log_Printf(LogWARN, "Pap Input: Truncated header !\n");
return NULL;
}
if (authp->in.hdr.code == 0 || authp->in.hdr.code > MAXPAPCODE) {
log_Printf(LogPHASE, "Pap Input: %d: Bad PAP code !\n", authp->in.hdr.code);
m_freem(bp);
return NULL;
}
if (authp->in.hdr.code != PAP_REQUEST && authp->id != authp->in.hdr.id &&
Enabled(bundle, OPT_IDCHECK)) {
/* Wrong conversation dude ! */
log_Printf(LogPHASE, "Pap Input: %s dropped (got id %d, not %d)\n",
papcodes[authp->in.hdr.code], authp->in.hdr.id, authp->id);
m_freem(bp);
return NULL;
}
m_settype(bp, MB_PAPIN);
authp->id = authp->in.hdr.id; /* We respond with this id */
if (bp) {
bp = mbuf_Read(bp, &nlen, 1);
if (authp->in.hdr.code == PAP_ACK) {
/*
* Don't restrict the length of our acknowledgement freetext to
* nlen (a one-byte length). Show the rest of the ack packet
* instead. This isn't really part of the protocol.....
*/
bp = m_pullup(bp);
txt = MBUF_CTOP(bp);
txtlen = m_length(bp);
} else {
bp = auth_ReadName(authp, bp, nlen);
txt = authp->in.name;
txtlen = strlen(authp->in.name);
}
} else {
txt = "";
txtlen = 0;
}
log_Printf(LogPHASE, "Pap Input: %s (%.*s)\n",
papcodes[authp->in.hdr.code], txtlen, txt);
switch (authp->in.hdr.code) {
case PAP_REQUEST:
if (bp == NULL) {
log_Printf(LogPHASE, "Pap Input: No key given !\n");
break;
}
bp = mbuf_Read(bp, &klen, 1);
if (m_length(bp) < klen) {
log_Printf(LogERROR, "Pap Input: Truncated key !\n");
break;
}
if ((key = malloc(klen+1)) == NULL) {
log_Printf(LogERROR, "Pap Input: Out of memory !\n");
break;
}
bp = mbuf_Read(bp, key, klen);
key[klen] = '\0';
#ifndef NORADIUS
if (*bundle->radius.cfg.file) {
if (!radius_Authenticate(&bundle->radius, authp, authp->in.name,
key, strlen(key), NULL, 0))
pap_Failure(authp);
} else
#endif
if (auth_Validate(bundle, authp->in.name, key))
pap_Success(authp);
else
pap_Failure(authp);
free(key);
break;
case PAP_ACK:
auth_StopTimer(authp);
if (p->link.lcp.auth_iwait == PROTO_PAP) {
p->link.lcp.auth_iwait = 0;
if (p->link.lcp.auth_ineed == 0)
/*
* We've succeeded in our ``login''
* If we're not expecting the peer to authenticate (or he already
* has), proceed to network phase.
*/
datalink_AuthOk(p->dl);
}
break;
case PAP_NAK:
auth_StopTimer(authp);
datalink_AuthNotOk(p->dl);
break;
}
m_freem(bp);
return NULL;
}
struct mbuf *
chap_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
{
struct physical *p = link2physical(l);
struct chap *chap = &p->dl->chap;
char *name, *key, *ans;
int len, nlen;
u_char alen;
#ifndef NODES
int lanman;
#endif
if (p == NULL) {
log_Printf(LogERROR, "chap_Input: Not a physical link - dropped\n");
m_freem(bp);
return NULL;
}
if (bundle_Phase(bundle) != PHASE_NETWORK &&
bundle_Phase(bundle) != PHASE_AUTHENTICATE) {
log_Printf(LogPHASE, "Unexpected chap input - dropped !\n");
m_freem(bp);
return NULL;
}
m_settype(bp, MB_CHAPIN);
if ((bp = auth_ReadHeader(&chap->auth, bp)) == NULL &&
ntohs(chap->auth.in.hdr.length) == 0)
log_Printf(LogWARN, "Chap Input: Truncated header !\n");
else if (chap->auth.in.hdr.code == 0 || chap->auth.in.hdr.code > MAXCHAPCODE)
log_Printf(LogPHASE, "Chap Input: %d: Bad CHAP code !\n",
chap->auth.in.hdr.code);
else {
len = m_length(bp);
ans = NULL;
if (chap->auth.in.hdr.code != CHAP_CHALLENGE &&
chap->auth.id != chap->auth.in.hdr.id &&
Enabled(bundle, OPT_IDCHECK)) {
/* Wrong conversation dude ! */
log_Printf(LogPHASE, "Chap Input: %s dropped (got id %d, not %d)\n",
chapcodes[chap->auth.in.hdr.code], chap->auth.in.hdr.id,
chap->auth.id);
m_freem(bp);
return NULL;
}
chap->auth.id = chap->auth.in.hdr.id; /* We respond with this id */
#ifndef NODES
lanman = 0;
#endif
switch (chap->auth.in.hdr.code) {
case CHAP_CHALLENGE:
bp = mbuf_Read(bp, &alen, 1);
len -= alen + 1;
if (len < 0) {
log_Printf(LogERROR, "Chap Input: Truncated challenge !\n");
m_freem(bp);
return NULL;
}
*chap->challenge.peer = alen;
bp = mbuf_Read(bp, chap->challenge.peer + 1, alen);
bp = auth_ReadName(&chap->auth, bp, len);
#ifndef NODES
lanman = p->link.lcp.his_authtype == 0x80 &&
((chap->NTRespSent && IsAccepted(p->link.lcp.cfg.chap80lm)) ||
!IsAccepted(p->link.lcp.cfg.chap80nt));
/* Generate local challenge value */
chap_ChallengeInit(&chap->auth);
#endif
break;
case CHAP_RESPONSE:
auth_StopTimer(&chap->auth);
bp = mbuf_Read(bp, &alen, 1);
len -= alen + 1;
if (len < 0) {
log_Printf(LogERROR, "Chap Input: Truncated response !\n");
m_freem(bp);
return NULL;
}
if ((ans = malloc(alen + 1)) == NULL) {
log_Printf(LogERROR, "Chap Input: Out of memory !\n");
m_freem(bp);
return NULL;
}
*ans = chap->auth.id;
bp = mbuf_Read(bp, ans + 1, alen);
bp = auth_ReadName(&chap->auth, bp, len);
#ifndef NODES
lanman = p->link.lcp.want_authtype == 0x80 &&
alen == 49 && ans[alen] == 0;
#endif
break;
case CHAP_SUCCESS:
case CHAP_FAILURE:
/* chap->auth.in.name is already set up at CHALLENGE time */
if ((ans = malloc(len + 1)) == NULL) {
log_Printf(LogERROR, "Chap Input: Out of memory !\n");
m_freem(bp);
return NULL;
}
bp = mbuf_Read(bp, ans, len);
ans[len] = '\0';
break;
}
switch (chap->auth.in.hdr.code) {
case CHAP_CHALLENGE:
case CHAP_RESPONSE:
if (*chap->auth.in.name)
log_Printf(LogPHASE, "Chap Input: %s (%d bytes from %s%s)\n",
chapcodes[chap->auth.in.hdr.code], alen,
chap->auth.in.name,
#ifndef NODES
lanman && chap->auth.in.hdr.code == CHAP_RESPONSE ?
" - lanman" :
#endif
"");
else
log_Printf(LogPHASE, "Chap Input: %s (%d bytes%s)\n",
chapcodes[chap->auth.in.hdr.code], alen,
#ifndef NODES
lanman && chap->auth.in.hdr.code == CHAP_RESPONSE ?
" - lanman" :
#endif
"");
break;
case CHAP_SUCCESS:
case CHAP_FAILURE:
if (*ans)
log_Printf(LogPHASE, "Chap Input: %s (%s)\n",
chapcodes[chap->auth.in.hdr.code], ans);
else
log_Printf(LogPHASE, "Chap Input: %s\n",
chapcodes[chap->auth.in.hdr.code]);
break;
}
switch (chap->auth.in.hdr.code) {
case CHAP_CHALLENGE:
if (*bundle->cfg.auth.key == '!' && bundle->cfg.auth.key[1] != '!')
chap_StartChild(chap, bundle->cfg.auth.key + 1,
bundle->cfg.auth.name);
else
chap_Respond(chap, bundle->cfg.auth.name, bundle->cfg.auth.key +
(*bundle->cfg.auth.key == '!' ? 1 : 0),
p->link.lcp.his_authtype
#ifndef NODES
, lanman
#endif
);
break;
case CHAP_RESPONSE:
name = chap->auth.in.name;
nlen = strlen(name);
#ifndef NODES
if (p->link.lcp.want_authtype == 0x81) {
struct MSCHAPv2_resp *resp = (struct MSCHAPv2_resp *)(ans + 1);
chap->challenge.peer[0] = sizeof resp->PeerChallenge;
memcpy(chap->challenge.peer + 1, resp->PeerChallenge,
sizeof resp->PeerChallenge);
}
#endif
#ifndef NORADIUS
if (*bundle->radius.cfg.file) {
if (!radius_Authenticate(&bundle->radius, &chap->auth,
chap->auth.in.name, ans, alen + 1,
chap->challenge.local + 1,
*chap->challenge.local))
chap_Failure(&chap->auth);
} else
#endif
{
if (p->link.lcp.want_authtype == 0x81 && ans[alen] != '\0' &&
alen == sizeof(struct MSCHAPv2_resp)) {
struct MSCHAPv2_resp *resp = (struct MSCHAPv2_resp *)(ans + 1);
log_Printf(LogWARN, "%s: Compensating for corrupt (Win98/WinME?) "
"CHAP81 RESPONSE\n", l->name);
resp->Flags = '\0'; /* rfc2759 says it *MUST* be zero */
}
key = auth_GetSecret(bundle, name, nlen, p);
if (key) {
#ifndef NODES
if (p->link.lcp.want_authtype == 0x80 &&
lanman && !IsEnabled(p->link.lcp.cfg.chap80lm)) {
log_Printf(LogPHASE, "Auth failure: LANMan not enabled\n");
if (chap_HaveAnotherGo(chap))
break;
key = NULL;
} else if (p->link.lcp.want_authtype == 0x80 &&
!lanman && !IsEnabled(p->link.lcp.cfg.chap80nt)) {
log_Printf(LogPHASE, "Auth failure: mschap not enabled\n");
if (chap_HaveAnotherGo(chap))
break;
key = NULL;
} else if (p->link.lcp.want_authtype == 0x81 &&
!IsEnabled(p->link.lcp.cfg.chap81)) {
log_Printf(LogPHASE, "Auth failure: CHAP81 not enabled\n");
key = NULL;
} else
#endif
{
char *myans = chap_BuildAnswer(name, key, chap->auth.id,
chap->challenge.local,
p->link.lcp.want_authtype
#ifndef NODES
, chap->challenge.peer,
chap->authresponse, lanman);
MPPE_IsServer = 1; /* XXX Global ! */
#else
);
#endif
if (myans == NULL)
key = NULL;
else {
if (!chap_Cmp(p->link.lcp.want_authtype, myans + 1, *myans,
ans + 1, alen
#ifndef NODES
, lanman
#endif
))
key = NULL;
free(myans);
}
}
}
if (key)
chap_Success(&chap->auth);
else
chap_Failure(&chap->auth);
}
break;
case CHAP_SUCCESS:
if (p->link.lcp.auth_iwait == PROTO_CHAP) {
p->link.lcp.auth_iwait = 0;
if (p->link.lcp.auth_ineed == 0) {
#ifndef NODES
if (p->link.lcp.his_authtype == 0x81) {
if (strncasecmp(ans, chap->authresponse, 42)) {
datalink_AuthNotOk(p->dl);
log_Printf(LogWARN, "CHAP81: AuthenticatorResponse: (%.42s)"
" != ans: (%.42s)\n", chap->authresponse, ans);
} else {
/* Successful login */
MPPE_MasterKeyValid = 1; /* XXX Global ! */
datalink_AuthOk(p->dl);
}
} else
#endif
/*
* We've succeeded in our ``login''
* If we're not expecting the peer to authenticate (or he already
* has), proceed to network phase.
*/
datalink_AuthOk(p->dl);
}
}
break;
case CHAP_FAILURE:
datalink_AuthNotOk(p->dl);
break;
}
free(ans);
}
