* Implemented EAP-TLS authentication
*/
-#define RCSID "$Id: eap.c,v 1.4 2004/11/09 22:39:25 paulus Exp $"
-
-/*
- * TODO:
- */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
-#include "pppd.h"
+#include "pppd-private.h"
+#include "options.h"
#include "pathnames.h"
-#include "md5.h"
+#include "crypto.h"
+#include "crypto_ms.h"
#include "eap.h"
+#ifdef PPP_WITH_PEAP
+#include "peap.h"
+#endif /* PPP_WITH_PEAP */
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
#include <t_pwd.h>
#include <t_server.h>
#include <t_client.h>
-#include "pppcrypt.h"
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
-#ifndef SHA_DIGESTSIZE
-#define SHA_DIGESTSIZE 20
-#endif
-
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
#include "eap-tls.h"
-#endif /* USE_EAPTLS */
-#ifdef CHAPMS
-#include "magic.h"
+#endif /* PPP_WITH_EAPTLS */
+
+#ifdef PPP_WITH_CHAPMS
+#include "chap.h"
#include "chap_ms.h"
-#include "chap-new.h"
-#endif /* CHAPMS */
+
+extern int chapms_strip_domain;
+#endif /* PPP_WITH_CHAPMS */
eap_state eap_states[NUM_PPP]; /* EAP state; one for each unit */
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
static char *pn_secret = NULL; /* Pseudonym generating secret */
#endif
/*
* Command-line options.
*/
-static option_t eap_option_list[] = {
+static struct option eap_option_list[] = {
{ "eap-restart", o_int, &eap_states[0].es_server.ea_timeout,
"Set retransmit timeout for EAP Requests (server)" },
{ "eap-max-sreq", o_int, &eap_states[0].es_server.ea_maxrequests,
"Set max number of EAP Requests allows (client)" },
{ "eap-interval", o_int, &eap_states[0].es_rechallenge,
"Set interval for EAP rechallenge" },
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
{ "srp-interval", o_int, &eap_states[0].es_lwrechallenge,
"Set interval for SRP lightweight rechallenge" },
{ "srp-pn-secret", o_string, &pn_secret,
/*
* Protocol entry points.
*/
-static void eap_init __P((int unit));
-static void eap_input __P((int unit, u_char *inp, int inlen));
-static void eap_protrej __P((int unit));
-static void eap_lowerup __P((int unit));
-static void eap_lowerdown __P((int unit));
-static int eap_printpkt __P((u_char *inp, int inlen,
- void (*)(void *arg, char *fmt, ...), void *arg));
+static void eap_init (int unit);
+static void eap_input (int unit, u_char *inp, int inlen);
+static void eap_protrej (int unit);
+static void eap_lowerup (int unit);
+static void eap_lowerdown (int unit);
+static int eap_printpkt (u_char *inp, int inlen,
+ void (*)(void *arg, char *fmt, ...), void *arg);
struct protent eap_protent = {
PPP_EAP, /* protocol number */
NULL /* say whether to bring up link for this pkt */
};
+#ifdef PPP_WITH_SRP
/*
* A well-known 2048 bit modulus.
*/
0x9B, 0x65, 0xE3, 0x72, 0xFC, 0xD6, 0x8E, 0xF2,
0x0F, 0xA7, 0x11, 0x1F, 0x9E, 0x4A, 0xFF, 0x73
};
+#endif /* PPP_WITH_SRP */
/* Local forward declarations. */
-static void eap_server_timeout __P((void *arg));
+static void eap_server_timeout (void *arg);
/*
* Convert EAP state code to printable string for debug.
*/
static const char *
-eap_state_name(esc)
-enum eap_state_code esc;
+eap_state_name(enum eap_state_code esc)
{
static const char *state_names[] = { EAP_STATES };
* called once by main() during start-up.
*/
static void
-eap_init(unit)
-int unit;
+eap_init(int unit)
{
eap_state *esp = &eap_states[unit];
esp->es_server.ea_id = (u_char)(drand48() * 0x100);
esp->es_client.ea_timeout = EAP_DEFREQTIME;
esp->es_client.ea_maxrequests = EAP_DEFALLOWREQ;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
esp->es_client.ea_using_eaptls = 0;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
+#ifdef PPP_WITH_CHAPMS
+ esp->es_client.digest = chap_find_digest(CHAP_MICROSOFT_V2);
+ esp->es_server.digest = chap_find_digest(CHAP_MICROSOFT_V2);
+#endif
}
/*
* Request messages.
*/
static void
-eap_client_timeout(arg)
-void *arg;
+eap_client_timeout(void *arg)
{
eap_state *esp = (eap_state *) arg;
* after eap_lowerup.
*/
void
-eap_authwithpeer(unit, localname)
-int unit;
-char *localname;
+eap_authwithpeer(int unit, char *localname)
{
eap_state *esp = &eap_states[unit];
* (Server operation)
*/
static void
-eap_send_failure(esp)
-eap_state *esp;
+eap_send_failure(eap_state *esp)
{
u_char *outp;
* (Server operation)
*/
static void
-eap_send_success(esp)
-eap_state *esp;
+eap_send_success(eap_state *esp)
{
u_char *outp;
esp->es_server.ea_peer, esp->es_server.ea_peerlen);
}
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
/*
* Set DES key according to pseudonym-generating secret and current
* date.
*/
static bool
-pncrypt_setkey(int timeoffs)
+pncrypt_getkey(int timeoffs, unsigned char *key, int keylen)
{
struct tm *tp;
char tbuf[9];
- SHA1_CTX ctxt;
- u_char dig[SHA_DIGESTSIZE];
+ PPP_MD_CTX *ctxt;
time_t reftime;
if (pn_secret == NULL)
return (0);
reftime = time(NULL) + timeoffs;
tp = localtime(&reftime);
- SHA1Init(&ctxt);
- SHA1Update(&ctxt, pn_secret, strlen(pn_secret));
- strftime(tbuf, sizeof (tbuf), "%Y%m%d", tp);
- SHA1Update(&ctxt, tbuf, strlen(tbuf));
- SHA1Final(dig, &ctxt);
- return (DesSetkey(dig));
+
+ ctxt = PPP_MD_CTX_new();
+ if (ctxt) {
+
+ strftime(tbuf, sizeof (tbuf), "%Y%m%d", tp);
+
+ PPP_DigestInit(ctxt, PPP_sha1());
+ PPP_DigestUpdate(ctxt, pn_secret, strlen(pn_secret));
+ PPP_DigestUpdate(ctxt, tbuf, strlen(tbuf));
+ PPP_DigestFinal(ctxt, key, &keylen);
+
+ PPP_MD_CTX_free(ctxt);
+ return 1;
+ }
+
+ return (0);
}
static char base64[] =
};
static int
-b64enc(bs, inp, inlen, outp)
-struct b64state *bs;
-u_char *inp;
-int inlen;
-u_char *outp;
+b64enc(struct b64state *bs, u_char *inp, int inlen, u_char *outp)
{
int outlen = 0;
}
static int
-b64flush(bs, outp)
-struct b64state *bs;
-u_char *outp;
+b64flush(struct b64state *bs, u_char *outp)
{
int outlen = 0;
}
static int
-b64dec(bs, inp, inlen, outp)
-struct b64state *bs;
-u_char *inp;
-int inlen;
-u_char *outp;
+b64dec(struct b64state *bs, u_char *inp, int inlen, u_char *outp)
{
int outlen = 0;
char *cp;
}
return (outlen);
}
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
/*
* Assume that current waiting server state is complete and figure
* 0 for success and non-zero for failure.
*/
static void
-eap_figure_next_state(esp, status)
-eap_state *esp;
-int status;
+eap_figure_next_state(eap_state *esp, int status)
{
-#ifdef USE_SRP
- unsigned char secbuf[MAXWORDLEN], clear[8], *sp, *dp;
+#ifdef PPP_WITH_SRP
+ unsigned char secbuf[MAXWORDLEN], clear[8], *sp, *dp, key[SHA_DIGEST_LENGTH];
struct t_pw tpw;
struct t_confent *tce, mytce;
char *cp, *cp2;
struct t_server *ts;
- int id, i, plen, toffs;
+ int id, i, plen, clen, toffs, keylen;
u_char vals[2];
struct b64state bs;
-#endif /* USE_SRP */
-#ifdef USE_EAPTLS
+#endif /* PPP_WITH_SRP */
+#ifdef PPP_WITH_EAPTLS
struct eaptls_session *ets;
int secret_len;
char secret[MAXWORDLEN];
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
esp->es_server.ea_timeout = esp->es_savedtime;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
esp->es_server.ea_prev_state = esp->es_server.ea_state;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
switch (esp->es_server.ea_state) {
case eapBadAuth:
return;
case eapIdentify:
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
/* Discard any previous session. */
ts = (struct t_server *)esp->es_server.ea_session;
if (ts != NULL) {
esp->es_server.ea_session = NULL;
esp->es_server.ea_skey = NULL;
}
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
if (status != 0) {
esp->es_server.ea_state = eapBadAuth;
break;
}
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
/* If we've got a pseudonym, try to decode to real name. */
if (esp->es_server.ea_peerlen > SRP_PSEUDO_LEN &&
strncmp(esp->es_server.ea_peer, SRP_PSEUDO_ID,
secbuf);
toffs = 0;
for (i = 0; i < 5; i++) {
- pncrypt_setkey(toffs);
+ pncrypt_getkey(toffs, key, keylen);
toffs -= 86400;
- if (!DesDecrypt(secbuf, clear)) {
+
+ if (!DesDecrypt(secbuf, key, clear)) {
dbglog("no DES here; cannot decode "
- "pseudonym");
+ "pseudonym");
return;
}
id = *(unsigned char *)clear;
dp += i;
sp = secbuf + 8;
while (plen > 0) {
- (void) DesDecrypt(sp, dp);
+ DesDecrypt(sp, key, dp);
sp += 8;
dp += 8;
plen -= 8;
tpw.pebuf.name = esp->es_server.ea_peer;
tpw.pebuf.password.len = t_fromb64((char *)tpw.pwbuf,
cp);
- tpw.pebuf.password.data = tpw.pwbuf;
+ tpw.pebuf.password.data = (char*) tpw.pwbuf;
tpw.pebuf.salt.len = t_fromb64((char *)tpw.saltbuf,
cp2);
tpw.pebuf.salt.data = tpw.saltbuf;
t_servergenexp(ts);
break;
}
-#endif /* USE_SRP */
-#ifdef USE_EAPTLS
+#endif /* PPP_WITH_SRP */
+#ifdef PPP_WITH_EAPTLS
if (!get_secret(esp->es_unit, esp->es_server.ea_peer,
esp->es_server.ea_name, secret, &secret_len, 1)) {
esp->es_server.ea_state = eapTlsStart;
break;
}
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
esp->es_server.ea_state = eapMD5Chall;
break;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
case eapTlsStart:
/* Initialize ssl session */
if(!eaptls_init_ssl_server(esp)) {
case eapTlsSendAlert:
esp->es_server.ea_state = eapTlsRecvAlertAck;
break;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
case eapSRP1:
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
ts = (struct t_server *)esp->es_server.ea_session;
if (ts != NULL && status != 0) {
t_serverclose(ts);
esp->es_server.ea_session = NULL;
esp->es_server.ea_skey = NULL;
}
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
if (status == 1) {
esp->es_server.ea_state = eapMD5Chall;
} else if (status != 0 || esp->es_server.ea_session == NULL) {
break;
case eapSRP2:
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
ts = (struct t_server *)esp->es_server.ea_session;
if (ts != NULL && status != 0) {
t_serverclose(ts);
esp->es_server.ea_session = NULL;
esp->es_server.ea_skey = NULL;
}
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
if (status != 0 || esp->es_server.ea_session == NULL) {
esp->es_server.ea_state = eapBadAuth;
} else {
case eapSRP3:
case eapSRP4:
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
ts = (struct t_server *)esp->es_server.ea_session;
if (ts != NULL && status != 0) {
t_serverclose(ts);
esp->es_server.ea_session = NULL;
esp->es_server.ea_skey = NULL;
}
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
if (status != 0 || esp->es_server.ea_session == NULL) {
esp->es_server.ea_state = eapBadAuth;
} else {
}
break;
-#ifdef CHAPMS
+#ifdef PPP_WITH_CHAPMS
case eapMSCHAPv2Chall:
#endif
case eapMD5Chall:
if (esp->es_server.ea_state == eapBadAuth)
eap_send_failure(esp);
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
dbglog("EAP id=0x%2x '%s' -> '%s'", esp->es_server.ea_id, eap_state_name(esp->es_server.ea_prev_state), eap_state_name(esp->es_server.ea_state));
-#endif /* USE_EAPTLS */
-}
-
-#if CHAPMS
-static int
-eap_chapms2_verify_response(int id, char *name,
- unsigned char *secret, int secret_len,
- unsigned char *challenge, unsigned char *response,
- char *message, int message_space)
-{
- unsigned char md[MS_CHAP2_RESPONSE_LEN];
- char saresponse[MS_AUTH_RESPONSE_LENGTH+1];
- int challenge_len, response_len;
-
- challenge_len = *challenge++; /* skip length, is 16 */
- response_len = *response++;
- if (response_len != MS_CHAP2_RESPONSE_LEN)
- goto bad; /* not even the right length */
-
- /* Generate the expected response and our mutual auth. */
- ChapMS2(challenge, &response[MS_CHAP2_PEER_CHALLENGE], name,
- (char *)secret, secret_len, md,
- (unsigned char *)saresponse, MS_CHAP2_AUTHENTICATOR);
-
- /* compare MDs and send the appropriate status */
- /*
- * Per RFC 2759, success message must be formatted as
- * "S=<auth_string> M=<message>"
- * where
- * <auth_string> is the Authenticator Response (mutual auth)
- * <message> is a text message
- *
- * However, some versions of Windows (win98 tested) do not know
- * about the M=<message> part (required per RFC 2759) and flag
- * it as an error (reported incorrectly as an encryption error
- * to the user). Since the RFC requires it, and it can be
- * useful information, we supply it if the peer is a conforming
- * system. Luckily (?), win98 sets the Flags field to 0x04
- * (contrary to RFC requirements) so we can use that to
- * distinguish between conforming and non-conforming systems.
- *
- * Special thanks to Alex Swiridov <say@real.kharkov.ua> for
- * help debugging this.
- */
- if (memcmp(&md[MS_CHAP2_NTRESP], &response[MS_CHAP2_NTRESP],
- MS_CHAP2_NTRESP_LEN) == 0) {
- if (response[MS_CHAP2_FLAGS])
- slprintf(message, message_space, "S=%s", saresponse);
- else
- slprintf(message, message_space, "S=%s M=%s",
- saresponse, "Access granted");
- return 1;
- }
-
- bad:
- /*
- * Failure message must be formatted as
- * "E=e R=r C=c V=v M=m"
- * where
- * e = error code (we use 691, ERROR_AUTHENTICATION_FAILURE)
- * r = retry (we use 1, ok to retry)
- * c = challenge to use for next response, we reuse previous
- * v = Change Password version supported, we use 0
- * m = text message
- *
- * The M=m part is only for MS-CHAPv2. Neither win2k nor
- * win98 (others untested) display the message to the user anyway.
- * They also both ignore the E=e code.
- *
- * Note that it's safe to reuse the same challenge as we don't
- * actually accept another response based on the error message
- * (and no clients try to resend a response anyway).
- *
- * Basically, this whole bit is useless code, even the small
- * implementation here is only because of overspecification.
- */
- slprintf(message, message_space, "E=691 R=1 C=%0.*B V=0 M=%s",
- challenge_len, challenge, "Access denied");
- return 0;
+#endif /* PPP_WITH_EAPTLS */
}
-static struct chap_digest_type eap_chapms2_digest = {
- CHAP_MICROSOFT_V2, /* code */
- NULL, /* chapms2_generate_challenge, */
- eap_chapms2_verify_response,
- NULL, /* chapms2_make_response, */
- NULL, /* chapms2_check_success, */
- NULL, /* chapms_handle_failure, */
-};
-
+#if PPP_WITH_CHAPMS
/*
* eap_chap_verify_response - check whether the peer's response matches
* what we think it should be. Returns 1 if it does (authentication
auth_peer_fail(esp->es_unit, PPP_EAP);
}
}
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
/*
* Format an EAP Request message and send it to the peer. Message
* type depends on current state. (Server operation)
*/
static void
-eap_send_request(esp)
-eap_state *esp;
+eap_send_request(eap_state *esp)
{
u_char *outp;
u_char *lenloc;
int outlen;
int challen;
char *str;
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
struct t_server *ts;
- u_char clear[8], cipher[8], dig[SHA_DIGESTSIZE], *optr, *cp;
- int i, j;
+ u_char clear[8], cipher[8], dig[SHA_DIGEST_LENGTH], *optr, *cp, key[SHA_DIGEST_LENGTH];
+ int i, j, diglen, clen, keylen = sizeof(key);
struct b64state b64;
- SHA1_CTX ctxt;
-#endif /* USE_SRP */
+ PPP_MD_CTX *ctxt;
+#endif /* PPP_WITH_SRP */
/* Handle both initial auth and restart */
if (esp->es_server.ea_state < eapIdentify &&
INCPTR(esp->es_server.ea_namelen, outp);
break;
-#ifdef CHAPMS
+#ifdef PPP_WITH_CHAPMS
case eapMSCHAPv2Chall:
- challen = 0x10;
+ esp->es_server.digest->generate_challenge(esp->es_challenge);
+ challen = esp->es_challenge[0];
esp->es_challen = challen;
- esp->es_challenge[0] = challen;
- random_bytes(&esp->es_challenge[1], challen);
PUTCHAR(EAPT_MSCHAPV2, outp);
PUTCHAR(CHAP_CHALLENGE, outp);
esp->es_server.ea_namelen);
INCPTR(esp->es_server.ea_namelen, outp);
break;
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
case eapTlsStart:
PUTCHAR(EAPT_TLS, outp);
PUTCHAR(EAP_TLS_FLAGS_START, outp);
eaptls_send(esp->es_server.ea_session, &outp);
eap_figure_next_state(esp, 0);
break;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
case eapSRP1:
PUTCHAR(EAPT_SRP, outp);
PUTCHAR(EAPSRP_CHALLENGE, outp);
PUTLONG(SRPVAL_EBIT, outp);
ts = (struct t_server *)esp->es_server.ea_session;
assert(ts != NULL);
- BCOPY(t_serverresponse(ts), outp, SHA_DIGESTSIZE);
- INCPTR(SHA_DIGESTSIZE, outp);
+ BCOPY(t_serverresponse(ts), outp, SHA_DIGEST_LENGTH);
+ INCPTR(SHA_DIGEST_LENGTH, outp);
- if (pncrypt_setkey(0)) {
+ if (pncrypt_getkey(0, key, keylen)) {
/* Generate pseudonym */
optr = outp;
cp = (unsigned char *)esp->es_server.ea_peer;
BCOPY(cp, clear + 1, j);
i -= j;
cp += j;
- if (!DesEncrypt(clear, cipher)) {
+
+ if (!DesEncrypt(clear, key, cipher)) {
dbglog("no DES here; not generating pseudonym");
break;
- }
+ }
+
BZERO(&b64, sizeof (b64));
outp++; /* space for pseudonym length */
outp += b64enc(&b64, cipher, 8, outp);
while (i >= 8) {
- (void) DesEncrypt(cp, cipher);
+ DesEncrypt(cp, key, cipher);
outp += b64enc(&b64, cipher, 8, outp);
cp += 8;
i -= 8;
*cp++ = drand48() * 0x100;
i++;
}
- (void) DesEncrypt(clear, cipher);
+
+ DesEncrypt(clear, key, cipher);
outp += b64enc(&b64, cipher, 8, outp);
}
outp += b64flush(&b64, outp);
/* Set length and pad out to next 20 octet boundary */
i = outp - optr - 1;
*optr = i;
- i %= SHA_DIGESTSIZE;
+ i %= SHA_DIGEST_LENGTH;
if (i != 0) {
- while (i < SHA_DIGESTSIZE) {
+ while (i < SHA_DIGEST_LENGTH) {
*outp++ = drand48() * 0x100;
i++;
}
}
/* Obscure the pseudonym with SHA1 hash */
- SHA1Init(&ctxt);
- SHA1Update(&ctxt, &esp->es_server.ea_id, 1);
- SHA1Update(&ctxt, esp->es_server.ea_skey,
- SESSION_KEY_LEN);
- SHA1Update(&ctxt, esp->es_server.ea_peer,
- esp->es_server.ea_peerlen);
- while (optr < outp) {
- SHA1Final(dig, &ctxt);
- cp = dig;
- while (cp < dig + SHA_DIGESTSIZE)
- *optr++ ^= *cp++;
- SHA1Init(&ctxt);
- SHA1Update(&ctxt, &esp->es_server.ea_id, 1);
- SHA1Update(&ctxt, esp->es_server.ea_skey,
- SESSION_KEY_LEN);
- SHA1Update(&ctxt, optr - SHA_DIGESTSIZE,
- SHA_DIGESTSIZE);
+ ctxt = PPP_MD_CTX_new();
+ if (ctxt) {
+
+ PPP_DigestInit(ctxt, PPP_sha1());
+ PPP_DigestUpdate(ctxt, &esp->es_server.ea_id, 1);
+ PPP_DigestUpdate(ctxt, &esp->es_server.ea_skey,
+ SESSION_KEY_LEN);
+ PPP_DigestUpdate(ctxt, esp->es_server.ea_peer,
+ esp->es_server.ea_peerlen);
+ while (optr < outp) {
+ diglen = SHA_DIGEST_LENGTH;
+ PPP_DigestFinal(ctxt, dig, &diglen);
+ cp = dig;
+ while (cp < dig + SHA_DIGEST_LENGTH)
+ *optr++ ^= *cp++;
+
+ PPP_DigestInit(ctxt, PPP_sha1());
+ PPP_DigestUpdate(ctxt, &esp->es_server.ea_id, 1);
+ PPP_DigestUpdate(ctxt, esp->es_server.ea_skey,
+ SESSION_KEY_LEN);
+ PPP_DigestUpdate(ctxt, optr - SHA_DIGEST_LENGTH,
+ SHA_DIGEST_LENGTH);
+ }
+
+ PPP_MD_CTX_free(ctxt);
}
}
break;
BCOPY(esp->es_challenge, outp, esp->es_challen);
INCPTR(esp->es_challen, outp);
break;
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
default:
return;
* after eap_lowerup.
*/
void
-eap_authpeer(unit, localname)
-int unit;
-char *localname;
+eap_authpeer(int unit, char *localname)
{
eap_state *esp = &eap_states[unit];
* expired.
*/
static void
-eap_server_timeout(arg)
-void *arg;
+eap_server_timeout(void *arg)
{
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
u_char *outp;
u_char *lenloc;
int outlen;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
eap_state *esp = (eap_state *) arg;
if (!eap_server_active(esp))
return;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
switch(esp->es_server.ea_prev_state) {
/*
default:
break;
}
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
/* EAP ID number must not change on timeout. */
eap_send_request(esp);
* will restart the timer. If it fails, then the link is dropped.
*/
static void
-eap_rechallenge(arg)
-void *arg;
+eap_rechallenge(void *arg)
{
eap_state *esp = (eap_state *)arg;
}
static void
-srp_lwrechallenge(arg)
-void *arg;
+srp_lwrechallenge(void *arg)
{
eap_state *esp = (eap_state *)arg;
* thing.
*/
static void
-eap_lowerup(unit)
-int unit;
+eap_lowerup(int unit)
{
eap_state *esp = &eap_states[unit];
* Cancel all timeouts and return to initial state.
*/
static void
-eap_lowerdown(unit)
-int unit;
+eap_lowerdown(int unit)
{
eap_state *esp = &eap_states[unit];
* failure.
*/
static void
-eap_protrej(unit)
-int unit;
+eap_protrej(int unit)
{
eap_state *esp = &eap_states[unit];
* Format and send a regular EAP Response message.
*/
static void
-eap_send_response(esp, id, typenum, str, lenstr)
-eap_state *esp;
-u_char id;
-u_char typenum;
-u_char *str;
-int lenstr;
+eap_send_response(eap_state *esp, u_char id, u_char typenum,
+ u_char *str, int lenstr)
{
u_char *outp;
int msglen;
* Format and send an MD5-Challenge EAP Response message.
*/
static void
-eap_chap_response(esp, id, hash, name, namelen)
-eap_state *esp;
-u_char id;
-u_char *hash;
-char *name;
-int namelen;
+eap_chap_response(eap_state *esp, u_char id, u_char *hash,
+ char *name, int namelen)
{
u_char *outp;
int msglen;
outp = outpacket_buf;
-
+
MAKEHEADER(outp, PPP_EAP);
PUTCHAR(EAP_RESPONSE, outp);
PUTCHAR(id, outp);
esp->es_client.ea_id = id;
- msglen = EAP_HEADERLEN + 2 * sizeof (u_char) + MD5_SIGNATURE_SIZE +
+ msglen = EAP_HEADERLEN + 2 * sizeof (u_char) + MD5_DIGEST_LENGTH +
namelen;
PUTSHORT(msglen, outp);
PUTCHAR(EAPT_MD5CHAP, outp);
- PUTCHAR(MD5_SIGNATURE_SIZE, outp);
- BCOPY(hash, outp, MD5_SIGNATURE_SIZE);
- INCPTR(MD5_SIGNATURE_SIZE, outp);
+ PUTCHAR(MD5_DIGEST_LENGTH, outp);
+ BCOPY(hash, outp, MD5_DIGEST_LENGTH);
+ INCPTR(MD5_DIGEST_LENGTH, outp);
if (namelen > 0) {
BCOPY(name, outp, namelen);
}
output(esp->es_unit, outpacket_buf, PPP_HDRLEN + msglen);
}
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
/*
* Format and send a SRP EAP Response message.
*/
static void
-eap_srp_response(esp, id, subtypenum, str, lenstr)
-eap_state *esp;
-u_char id;
-u_char subtypenum;
-u_char *str;
-int lenstr;
+eap_srp_response(eap_state *esp, u_char id, u_char subtypenum,
+ u_char *str, int lenstr)
{
u_char *outp;
int msglen;
* Format and send a SRP EAP Client Validator Response message.
*/
static void
-eap_srpval_response(esp, id, flags, str)
-eap_state *esp;
-u_char id;
-u_int32_t flags;
-u_char *str;
+eap_srpval_response(eap_state *esp, u_char id, u_int32_t flags, u_char *str)
{
u_char *outp;
int msglen;
PUTCHAR(id, outp);
esp->es_client.ea_id = id;
msglen = EAP_HEADERLEN + 2 * sizeof (u_char) + sizeof (u_int32_t) +
- SHA_DIGESTSIZE;
+ SHA_DIGEST_LENGTH;
PUTSHORT(msglen, outp);
PUTCHAR(EAPT_SRP, outp);
PUTCHAR(EAPSRP_CVALIDATOR, outp);
PUTLONG(flags, outp);
- BCOPY(str, outp, SHA_DIGESTSIZE);
+ BCOPY(str, outp, SHA_DIGEST_LENGTH);
output(esp->es_unit, outpacket_buf, PPP_HDRLEN + msglen);
}
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
/*
* Send an EAP-TLS response message with tls data
*/
static void
-eap_tls_response(esp, id)
-eap_state *esp;
-u_char id;
+eap_tls_response(eap_state *esp, u_char id)
{
u_char *outp;
int outlen;
* Send an EAP-TLS ack
*/
static void
-eap_tls_sendack(esp, id)
-eap_state *esp;
-u_char id;
+eap_tls_sendack(eap_state *esp, u_char id)
{
u_char *outp;
int outlen;
output(esp->es_unit, outpacket_buf, PPP_HDRLEN + outlen);
}
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
static void
-eap_send_nak(esp, id, type)
-eap_state *esp;
-u_char id;
-u_char type;
+eap_send_nak(eap_state *esp, u_char id, u_char type)
{
u_char *outp;
int msglen;
output(esp->es_unit, outpacket_buf, PPP_HDRLEN + msglen);
}
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
static char *
-name_of_pn_file()
+name_of_pn_file(void)
{
char *user, *path, *file;
struct passwd *pw;
errno = EINVAL;
return (NULL);
}
- file = _PATH_PSEUDONYM;
+ file = PPP_PATH_PSEUDONYM;
pl = strlen(user) + strlen(file) + 2;
path = malloc(pl);
if (path == NULL)
}
static int
-open_pn_file(modebits)
-mode_t modebits;
+open_pn_file(mode_t modebits)
{
char *path;
int fd, err;
}
static void
-remove_pn_file()
+remove_pn_file(void)
{
char *path;
}
static void
-write_pseudonym(esp, inp, len, id)
-eap_state *esp;
-u_char *inp;
-int len, id;
+write_pseudonym(eap_state *esp, u_char *inp, int len, int id)
{
u_char val;
u_char *datp, *digp;
- SHA1_CTX ctxt;
- u_char dig[SHA_DIGESTSIZE];
- int dsize, fd, olen = len;
+ PPP_MD_CTX *ctxt;
+ u_char dig[SHA_DIGEST_LENGTH];
+ int dsize, fd, olen = len, diglen = sizeof(dig);
/*
* Do the decoding by working backwards. This eliminates the need
*/
val = id;
while (len > 0) {
- if ((dsize = len % SHA_DIGESTSIZE) == 0)
- dsize = SHA_DIGESTSIZE;
+ if ((dsize = len % SHA_DIGEST_LENGTH) == 0)
+ dsize = SHA_DIGEST_LENGTH;
len -= dsize;
datp = inp + len;
- SHA1Init(&ctxt);
- SHA1Update(&ctxt, &val, 1);
- SHA1Update(&ctxt, esp->es_client.ea_skey, SESSION_KEY_LEN);
- if (len > 0) {
- SHA1Update(&ctxt, datp, SHA_DIGESTSIZE);
- } else {
- SHA1Update(&ctxt, esp->es_client.ea_name,
- esp->es_client.ea_namelen);
+ ctxt = PPP_MD_CTX_new();
+ if (ctxt) {
+
+ PPP_DigestInit(ctxt, PPP_sha1());
+ PPP_DigestUpdate(ctxt, &val, 1);
+ PPP_DigestUpdate(ctxt, esp->es_client.ea_skey,
+ SESSION_KEY_LEN);
+ if (len > 0) {
+ PPP_DigestUpdate(ctxt, datp, SHA_DIGEST_LENGTH);
+ } else {
+ PPP_DigestUpdate(ctxt, esp->es_client.ea_name,
+ esp->es_client.ea_namelen);
+ }
+ PPP_DigestFinal(ctxt, dig, &diglen);
+
+ for (digp = dig; digp < dig + SHA_DIGEST_LENGTH; digp++)
+ *datp++ ^= *digp;
+
+ PPP_MD_CTX_free(ctxt);
}
- SHA1Final(dig, &ctxt);
- for (digp = dig; digp < dig + SHA_DIGESTSIZE; digp++)
- *datp++ ^= *digp;
}
/* Now check that the result is sane */
remove_pn_file();
}
}
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
+
+#if PPP_WITH_CHAPMS
+/*
+ * Format and send an CHAPV2-Challenge EAP Response message.
+ */
+static void
+eap_chapv2_response(eap_state *esp, u_char id, u_char chapid, u_char *response, char *user, int user_len)
+{
+ u_char *outp;
+ int msglen;
+
+ outp = outpacket_buf;
+
+ MAKEHEADER(outp, PPP_EAP);
+
+ PUTCHAR(EAP_RESPONSE, outp);
+ PUTCHAR(id, outp);
+ esp->es_client.ea_id = id;
+ msglen = EAP_HEADERLEN + 6 * sizeof (u_char) + MS_CHAP2_RESPONSE_LEN + user_len;
+ PUTSHORT(msglen, outp);
+ PUTCHAR(EAPT_MSCHAPV2, outp);
+ PUTCHAR(CHAP_RESPONSE, outp);
+ PUTCHAR(chapid, outp);
+ PUTCHAR(0, outp);
+ /* len */
+ PUTCHAR(5 + user_len + MS_CHAP2_RESPONSE_LEN, outp);
+ BCOPY(response, outp, MS_CHAP2_RESPONSE_LEN+1); // VLEN + VALUE
+ INCPTR(MS_CHAP2_RESPONSE_LEN+1, outp);
+ BCOPY(user, outp, user_len);
+
+ output(esp->es_unit, outpacket_buf, PPP_HDRLEN + msglen);
+}
+#endif
/*
* eap_request - Receive EAP Request message (client mode).
*/
static void
-eap_request(esp, inp, id, len)
-eap_state *esp;
-u_char *inp;
-int id;
-int len;
+eap_request(eap_state *esp, u_char *inp, int id, int len)
{
u_char typenum;
u_char vallen;
int secret_len;
char secret[MAXWORDLEN];
char rhostname[256];
- MD5_CTX mdContext;
- u_char hash[MD5_SIGNATURE_SIZE];
-#ifdef USE_EAPTLS
+ PPP_MD_CTX *mdctx;
+ u_char hash[MD5_DIGEST_LENGTH];
+ int hashlen = MD5_DIGEST_LENGTH;
+#ifdef PPP_WITH_EAPTLS
u_char flags;
struct eaptls_session *ets = esp->es_client.ea_session;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
struct t_client *tc;
struct t_num sval, gval, Nval, *Ap, Bval;
u_char vals[2];
- SHA1_CTX ctxt;
- u_char dig[SHA_DIGESTSIZE];
+ PPP_MD_CTX *ctxt;
+ u_char dig[SHA_DIGEST_LENGTH];
+ int diglen = sizeof(dig);
int fd;
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
/*
* Ignore requests if we're not open
case EAPT_IDENTITY:
if (len > 0)
info("EAP: Identity prompt \"%.*q\"", len, inp);
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
if (esp->es_usepseudo &&
(esp->es_usedpseudo == 0 ||
(esp->es_usedpseudo == 1 &&
remove_pn_file();
esp->es_usedpseudo = 2;
}
-#endif /* USE_SRP */
- eap_send_response(esp, id, typenum, esp->es_client.ea_name,
+#endif /* PPP_WITH_SRP */
+ eap_send_response(esp, id, typenum, (u_char *)esp->es_client.ea_name,
esp->es_client.ea_namelen);
break;
eap_send_nak(esp, id, EAPT_SRP);
break;
}
- MD5_Init(&mdContext);
- typenum = id;
- MD5_Update(&mdContext, &typenum, 1);
- MD5_Update(&mdContext, (u_char *)secret, secret_len);
- BZERO(secret, sizeof (secret));
- MD5_Update(&mdContext, inp, vallen);
- MD5_Final(hash, &mdContext);
- eap_chap_response(esp, id, hash, esp->es_client.ea_name,
- esp->es_client.ea_namelen);
+
+ mdctx = PPP_MD_CTX_new();
+ if (mdctx != NULL) {
+ if (PPP_DigestInit(mdctx, PPP_md5())) {
+ typenum = id;
+ if (PPP_DigestUpdate(mdctx, &typenum, 1)) {
+ if (PPP_DigestUpdate(mdctx, secret, secret_len)) {
+ BZERO(secret, sizeof(secret));
+ if (PPP_DigestUpdate(mdctx, inp, vallen)) {
+ if (PPP_DigestFinal(mdctx, hash, &hashlen)) {
+ eap_chap_response(esp, id, hash, esp->es_client.ea_name,
+ esp->es_client.ea_namelen);
+ PPP_MD_CTX_free(mdctx);
+ break;
+ }
+ }
+ }
+ }
+ }
+ PPP_MD_CTX_free(mdctx);
+ }
+ dbglog("EAP: Invalid MD5 checksum");
+ eap_send_nak(esp, id, EAPT_SRP);
break;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
case EAPT_TLS:
switch(esp->es_client.ea_state) {
/* Init ssl session */
if(!eaptls_init_ssl_client(esp)) {
dbglog("cannot init ssl");
- eap_send_nak(esp, id, EAPT_TLS);
+ eap_send_nak(esp, id, EAPT_MSCHAPV2);
esp->es_client.ea_using_eaptls = 0;
break;
}
}
/* The server has sent a bad start packet. */
- eap_send_nak(esp, id, EAPT_TLS);
+ eap_send_nak(esp, id, EAPT_MSCHAPV2);
break;
case eapTlsRecvAck:
/* Check if TLS handshake is finished */
if(eaptls_is_init_finished(ets)) {
-#ifdef MPPE
+#ifdef PPP_WITH_MPPE
eaptls_gen_mppe_keys(ets, 1);
#endif
eaptls_free_session(ets);
break;
default:
- eap_send_nak(esp, id, EAPT_TLS);
+ eap_send_nak(esp, id, EAPT_MSCHAPV2);
esp->es_client.ea_using_eaptls = 0;
break;
}
break;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
case EAPT_SRP:
if (len < 1) {
error("EAP: received empty SRP Request");
esp->es_client.ea_id, id);
}
} else {
- len -= sizeof (u_int32_t) + SHA_DIGESTSIZE;
+ len -= sizeof (u_int32_t) + SHA_DIGEST_LENGTH;
if (len < 0 || t_clientverify(tc, inp +
sizeof (u_int32_t)) != 0) {
error("EAP: SRP server verification "
GETLONG(esp->es_client.ea_keyflags, inp);
/* Save pseudonym if user wants it. */
if (len > 0 && esp->es_usepseudo) {
- INCPTR(SHA_DIGESTSIZE, inp);
+ INCPTR(SHA_DIGEST_LENGTH, inp);
write_pseudonym(esp, inp, len, id);
}
}
warn("EAP: malformed Lightweight rechallenge");
return;
}
- SHA1Init(&ctxt);
- vals[0] = id;
- SHA1Update(&ctxt, vals, 1);
- SHA1Update(&ctxt, esp->es_client.ea_skey,
- SESSION_KEY_LEN);
- SHA1Update(&ctxt, inp, len);
- SHA1Update(&ctxt, esp->es_client.ea_name,
- esp->es_client.ea_namelen);
- SHA1Final(dig, &ctxt);
- eap_srp_response(esp, id, EAPSRP_LWRECHALLENGE, dig,
- SHA_DIGESTSIZE);
+ ctxt = PPP_MD_CTX_new();
+ if (ctxt) {
+
+ vals[0] = id;
+ PPP_DigestInit(ctxt, PPP_sha1());
+ PPP_DigestUpdate(ctxt, vals, 1);
+ PPP_DigestUpdate(ctxt, esp->es_client.ea_skey,
+ SESSION_KEY_LEN);
+ PPP_DigestUpdate(ctxt, inp, len);
+ PPP_DigestUpdate(ctxt, esp->es_client.ea_name,
+ esp->es_client.ea_namelen);
+ PPP_DigestFinal(ctxt, dig, &diglen);
+
+ PPP_MD_CTX_free(ctxt);
+
+ eap_srp_response(esp, id, EAPSRP_LWRECHALLENGE, dig,
+ SHA_DIGEST_LENGTH);
+ }
break;
default:
break;
}
break;
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
+
+#ifdef PPP_WITH_CHAPMS
+ case EAPT_MSCHAPV2:
+ if (len < 4) {
+ error("EAP: received invalid MSCHAPv2 packet, too short");
+ return;
+ }
+ unsigned char opcode;
+ GETCHAR(opcode, inp);
+ unsigned char chapid; /* Chapv2-ID */
+ GETCHAR(chapid, inp);
+ short mssize;
+ GETSHORT(mssize, inp);
+
+ /* Validate the mssize field */
+ if (len != mssize) {
+ error("EAP: received invalid MSCHAPv2 packet, invalid length");
+ return;
+ }
+ len -= 4;
+
+ /* If MSCHAPv2 digest was not found, NAK the packet */
+ if (!esp->es_client.digest) {
+ error("EAP MSCHAPv2 not supported");
+ eap_send_nak(esp, id, EAPT_SRP);
+ return;
+ }
+
+ switch (opcode) {
+ case CHAP_CHALLENGE: {
+
+ /* make_response() expects: VLEN + VALUE */
+ u_char *challenge = inp;
+
+ unsigned char vsize;
+ GETCHAR(vsize, inp);
+ len -= 1;
+
+ /* Validate the VALUE field */
+ if (vsize != MS_CHAP2_PEER_CHAL_LEN || len < MS_CHAP2_PEER_CHAL_LEN) {
+ error("EAP: received invalid MSCHAPv2 packet, invalid value-length: %d", vsize);
+ return;
+ }
+
+ /* Increment past the VALUE field */
+ INCPTR(MS_CHAP2_PEER_CHAL_LEN, inp);
+ len -= MS_CHAP2_PEER_CHAL_LEN;
+
+ /* Extract the hostname */
+ rhostname[0] = '\0';
+ if (len > 0) {
+ if (len >= sizeof (rhostname)) {
+ dbglog("EAP: trimming really long peer name down");
+ len = sizeof(rhostname) - 1;
+ }
+ BCOPY(inp, rhostname, len);
+ rhostname[len] = '\0';
+ }
+
+ /* In case the remote doesn't give us his name. */
+ if (explicit_remote || (remote_name[0] != '\0' && len == 0))
+ strlcpy(rhostname, remote_name, sizeof(rhostname));
+
+ /* Get the secret for authenticating ourselves with the specified host. */
+ if (!get_secret(esp->es_unit, esp->es_client.ea_name,
+ rhostname, secret, &secret_len, 0)) {
+ dbglog("EAP: no CHAP secret for auth to %q", rhostname);
+ eap_send_nak(esp, id, EAPT_SRP);
+ break;
+ }
+ esp->es_client.ea_namelen = strlen(esp->es_client.ea_name);
+
+ /* Create the MSCHAPv2 response (and add to cache) */
+ unsigned char response[MS_CHAP2_RESPONSE_LEN+1]; // VLEN + VALUE
+ esp->es_client.digest->make_response(response, chapid, esp->es_client.ea_name,
+ challenge, secret, secret_len, NULL);
+
+ eap_chapv2_response(esp, id, chapid, response, esp->es_client.ea_name, esp->es_client.ea_namelen);
+ break;
+ }
+ case CHAP_SUCCESS: {
+
+ /* Check response for mutual authentication */
+ u_char status = CHAP_FAILURE;
+ if (esp->es_client.digest->check_success(chapid, inp, len) == 1) {
+ info("Chap authentication succeeded! %.*v", len, inp);
+ status = CHAP_SUCCESS;
+ }
+ eap_send_response(esp, id, EAPT_MSCHAPV2, &status, sizeof(status));
+ break;
+ }
+ case CHAP_FAILURE: {
+
+ /* Process the failure string, and log appropriate information */
+ esp->es_client.digest->handle_failure(inp, len);
+
+ u_char status = CHAP_FAILURE;
+ eap_send_response(esp, id, EAPT_MSCHAPV2, &status, sizeof(status));
+ goto client_failure; /* force termination */
+ }
+ default:
+
+ error("EAP: received invalid MSCHAPv2 packet, invalid or unsupported opcode: %d", opcode);
+ eap_send_nak(esp, id, EAPT_SRP);
+ }
+
+ break;
+#endif /* PPP_WITH_CHAPMS */
+#ifdef PPP_WITH_PEAP
+ case EAPT_PEAP:
+
+ /* Initialize the PEAP context (if not already initialized) */
+ if (!esp->ea_peap) {
+ rhostname[0] = '\0';
+ if (explicit_remote || (remote_name[0] != '\0')) {
+ strlcpy(rhostname, remote_name, sizeof (rhostname));
+ }
+ if (peap_init(&esp->ea_peap, rhostname)) {
+ eap_send_nak(esp, id, EAPT_TLS);
+ break;
+ }
+ }
+
+ /* Process the PEAP packet */
+ if (peap_process(esp, id, inp, len)) {
+ eap_send_nak(esp, id, EAPT_TLS);
+ }
+
+ break;
+#endif // PPP_WITH_PEAP
default:
info("EAP: unknown authentication type %d; Naking", typenum);
}
return;
-#ifdef USE_SRP
client_failure:
esp->es_client.ea_state = eapBadAuth;
if (esp->es_client.ea_timeout > 0) {
UNTIMEOUT(eap_client_timeout, (void *)esp);
}
esp->es_client.ea_session = NULL;
+#ifdef PPP_WITH_SRP
t_clientclose(tc);
auth_withpeer_fail(esp->es_unit, PPP_EAP);
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
}
/*
* eap_response - Receive EAP Response message (server mode).
*/
static void
-eap_response(esp, inp, id, len)
-eap_state *esp;
-u_char *inp;
-int id;
-int len;
+eap_response(eap_state *esp, u_char *inp, int id, int len)
{
u_char typenum;
u_char vallen;
int secret_len;
char secret[MAXSECRETLEN];
char rhostname[256];
- MD5_CTX mdContext;
- u_char hash[MD5_SIGNATURE_SIZE];
-#ifdef USE_SRP
+ PPP_MD_CTX *mdctx;
+ u_char hash[MD5_DIGEST_LENGTH];
+ int hashlen = MD5_DIGEST_LENGTH;
+#ifdef PPP_WITH_SRP
struct t_server *ts;
struct t_num A;
- SHA1_CTX ctxt;
- u_char dig[SHA_DIGESTSIZE];
- SHA1_CTX ctxt;
- u_char dig[SHA_DIGESTSIZE];
-#endif /* USE_SRP */
+ PPP_MD_CTX *ctxt;
+ u_char dig[SHA_DIGEST_LENGTH];
+ int diglen = sizeof(dig);
+#endif /* PPP_WITH_SRP */
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
struct eaptls_session *ets;
u_char flags;
-#endif /* USE_EAPTLS */
-#ifdef CHAPMS
+#endif /* PPP_WITH_EAPTLS */
+#ifdef PPP_WITH_CHAPMS
u_char opcode;
- int (*chap_verifier)(char *, char *, int, struct chap_digest_type *,
- unsigned char *, unsigned char *, char *, int);
+ chap_verify_hook_fn *chap_verifier;
char response_message[256];
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
/*
* Ignore responses if we're not open
eap_figure_next_state(esp, 0);
break;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
case EAPT_TLS:
switch(esp->es_server.ea_state) {
GETCHAR(flags, inp);
if(len == 1 && !flags) { /* Ack = ok */
-#ifdef MPPE
+#ifdef PPP_WITH_MPPE
eaptls_gen_mppe_keys( esp->es_server.ea_session, 0 );
#endif
eap_send_success(esp);
break;
}
break;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
case EAPT_NOTIFICATION:
dbglog("EAP unexpected Notification; response discarded");
esp->es_server.ea_state = eapMD5Chall;
break;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
/* Send EAP-TLS start packet */
case EAPT_TLS:
esp->es_server.ea_state = eapTlsStart;
break;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
-#ifdef CHAPMS
+#ifdef PPP_WITH_CHAPMS
case EAPT_MSCHAPV2:
info("EAP: peer proposes MSCHAPv2");
+ /* If MSCHAPv2 digest was not found, NAK the packet */
+ if (!esp->es_server.digest) {
+ error("EAP MSCHAPv2 not supported");
+ eap_send_nak(esp, id, EAPT_SRP);
+ break;
+ }
esp->es_server.ea_state = eapMSCHAPv2Chall;
break;
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
default:
dbglog("EAP: peer requesting unknown Type %d", vallen);
eap_send_failure(esp);
break;
}
- MD5_Init(&mdContext);
- MD5_Update(&mdContext, &esp->es_server.ea_id, 1);
- MD5_Update(&mdContext, (u_char *)secret, secret_len);
- BZERO(secret, sizeof (secret));
- MD5_Update(&mdContext, esp->es_challenge, esp->es_challen);
- MD5_Final(hash, &mdContext);
- if (BCMP(hash, inp, MD5_SIGNATURE_SIZE) != 0) {
- eap_send_failure(esp);
- break;
+
+ mdctx = PPP_MD_CTX_new();
+ if (mdctx != NULL) {
+
+ if (PPP_DigestInit(mdctx, PPP_md5())) {
+
+ if (PPP_DigestUpdate(mdctx, &esp->es_server.ea_id, 1)) {
+
+ if (PPP_DigestUpdate(mdctx, &secret, secret_len)) {
+
+ BZERO(secret, sizeof(secret));
+ if (PPP_DigestUpdate(mdctx, esp->es_challenge, esp->es_challen)) {
+
+ if (PPP_DigestFinal(mdctx, hash, &hashlen)) {
+
+ if (BCMP(hash, inp, MD5_DIGEST_LENGTH) == 0) {
+ esp->es_server.ea_type = EAPT_MD5CHAP;
+ eap_send_success(esp);
+ eap_figure_next_state(esp, 0);
+
+ if (esp->es_rechallenge != 0) {
+ TIMEOUT(eap_rechallenge, esp, esp->es_rechallenge);
+ }
+ PPP_MD_CTX_free(mdctx);
+ break;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ PPP_MD_CTX_free(mdctx);
}
- esp->es_server.ea_type = EAPT_MD5CHAP;
- eap_send_success(esp);
- eap_figure_next_state(esp, 0);
- if (esp->es_rechallenge != 0)
- TIMEOUT(eap_rechallenge, esp, esp->es_rechallenge);
+
+ eap_send_failure(esp);
break;
-#ifdef CHAPMS
+#ifdef PPP_WITH_CHAPMS
case EAPT_MSCHAPV2:
if (len < 1) {
error("EAP: received MSCHAPv2 with no data");
(remote_name[0] != '\0' && vallen == len))
strlcpy(rhostname, remote_name, sizeof (rhostname));
+ /* strip the MS domain name */
+ if (chapms_strip_domain && strrchr(rhostname, '\\')) {
+ char tmp[MAXNAMELEN+1];
+
+ strcpy(tmp, strrchr(rhostname, '\\') + 1);
+ strlcpy(rhostname, tmp, sizeof(rhostname));
+ }
+
if (chap_verify_hook)
chap_verifier = chap_verify_hook;
else
if ((*chap_verifier)(rhostname,
esp->es_server.ea_name,
id,
- &eap_chapms2_digest,
+ esp->es_server.digest,
esp->es_challenge,
inp - 1,
response_message,
}
break;
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
-#ifdef USE_SRP
+#ifdef PPP_WITH_SRP
case EAPT_SRP:
if (len < 1) {
error("EAP: empty SRP Response");
eap_figure_next_state(esp, 1);
break;
}
- if (len < sizeof (u_int32_t) + SHA_DIGESTSIZE) {
+ if (len < sizeof (u_int32_t) + SHA_DIGEST_LENGTH) {
error("EAP: M1 length %d < %d", len,
- sizeof (u_int32_t) + SHA_DIGESTSIZE);
+ sizeof (u_int32_t) + SHA_DIGEST_LENGTH);
eap_figure_next_state(esp, 1);
break;
}
info("EAP: unexpected SRP Subtype 4 Response");
return;
}
- if (len != SHA_DIGESTSIZE) {
+ if (len != SHA_DIGEST_LENGTH) {
error("EAP: bad Lightweight rechallenge "
"response");
return;
}
- SHA1Init(&ctxt);
- vallen = id;
- SHA1Update(&ctxt, &vallen, 1);
- SHA1Update(&ctxt, esp->es_server.ea_skey,
- SESSION_KEY_LEN);
- SHA1Update(&ctxt, esp->es_challenge, esp->es_challen);
- SHA1Update(&ctxt, esp->es_server.ea_peer,
- esp->es_server.ea_peerlen);
- SHA1Final(dig, &ctxt);
- if (BCMP(dig, inp, SHA_DIGESTSIZE) != 0) {
- error("EAP: failed Lightweight rechallenge");
- eap_send_failure(esp);
- break;
+ ctxt = PPP_MD_CTX_new();
+ if (ctxt) {
+ vallen = id;
+
+ PPP_DigestInit(ctxt, PPP_sha1());
+ PPP_DigestUpdate(ctxt, &vallen, 1);
+ PPP_DigestUpdate(ctxt, esp->es_server.ea_skey,
+ SESSION_KEY_LEN);
+ PPP_DigestUpdate(ctxt, esp->es_challenge, esp->es_challen);
+ PPP_DigestUpdate(ctxt, esp->es_server.ea_peer,
+ esp->es_server.ea_peerlen);
+ PPP_DigestFinal(ctxt, dig, &diglen);
+
+ PPP_MD_CTX_free(ctxt);
+
+ if (BCMP(dig, inp, SHA_DIGEST_LENGTH) != 0) {
+ error("EAP: failed Lightweight rechallenge");
+ eap_send_failure(esp);
+ break;
+ }
+
+ esp->es_server.ea_state = eapOpen;
+ if (esp->es_lwrechallenge != 0)
+ TIMEOUT(srp_lwrechallenge, esp,
+ esp->es_lwrechallenge);
}
- esp->es_server.ea_state = eapOpen;
- if (esp->es_lwrechallenge != 0)
- TIMEOUT(srp_lwrechallenge, esp,
- esp->es_lwrechallenge);
break;
}
break;
-#endif /* USE_SRP */
+#endif /* PPP_WITH_SRP */
default:
/* This can't happen. */
* eap_success - Receive EAP Success message (client mode).
*/
static void
-eap_success(esp, inp, id, len)
-eap_state *esp;
-u_char *inp;
-int id;
-int len;
+eap_success(eap_state *esp, u_char *inp, int id, int len)
{
if (esp->es_client.ea_state != eapOpen && !eap_client_active(esp)
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
&& esp->es_client.ea_state != eapTlsRecvSuccess
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
) {
dbglog("EAP unexpected success message in state %s (%d)",
eap_state_name(esp->es_client.ea_state),
return;
}
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
if(esp->es_client.ea_using_eaptls && esp->es_client.ea_state !=
eapTlsRecvSuccess) {
dbglog("EAP-TLS unexpected success message in state %s (%d)",
esp->es_client.ea_state);
return;
}
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
if (esp->es_client.ea_timeout > 0) {
UNTIMEOUT(eap_client_timeout, (void *)esp);
PRINTMSG(inp, len);
}
+#ifdef PPP_WITH_PEAP
+ peap_finish(&esp->ea_peap);
+#endif
+
esp->es_client.ea_state = eapOpen;
auth_withpeer_success(esp->es_unit, PPP_EAP, 0);
}
* eap_failure - Receive EAP Failure message (client mode).
*/
static void
-eap_failure(esp, inp, id, len)
-eap_state *esp;
-u_char *inp;
-int id;
-int len;
+eap_failure(eap_state *esp, u_char *inp, int id, int len)
{
/*
* Ignore failure messages if we're not open
esp->es_client.ea_state = eapBadAuth;
error("EAP: peer reports authentication failure");
+
+#ifdef PPP_WITH_PEAP
+ peap_finish(&esp->ea_peap);
+#endif
+
auth_withpeer_fail(esp->es_unit, PPP_EAP);
}
* eap_input - Handle received EAP message.
*/
static void
-eap_input(unit, inp, inlen)
-int unit;
-u_char *inp;
-int inlen;
+eap_input(int unit, u_char *inp, int inlen)
{
eap_state *esp = &eap_states[unit];
u_char code, id;
};
static int
-eap_printpkt(inp, inlen, printer, arg)
-u_char *inp;
-int inlen;
-void (*printer) __P((void *, char *, ...));
-void *arg;
+eap_printpkt(u_char *inp, int inlen,
+ void (*printer) (void *, char *, ...), void *arg)
{
int code, id, len, rtype, vallen;
u_char *pstart;
u_int32_t uval;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
u_char flags;
-#endif /* USE_EAPTLS */
-#ifdef CHAPMS
+#endif /* PPP_WITH_EAPTLS */
+#ifdef PPP_WITH_CHAPMS
u_char opcode;
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
if (inlen < EAP_HEADERLEN)
return (0);
}
break;
-#ifdef CHAPMS
+#ifdef PPP_WITH_CHAPMS
case EAPT_MSCHAPV2:
if (len <= 0)
break;
break;
}
break;
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
case EAPT_TLS:
if (len < 1)
break;
printer(arg, flags & EAP_TLS_FLAGS_MF ? "M":"-");
printer(arg, flags & EAP_TLS_FLAGS_START ? "S":"- ");
break;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
+#ifdef PPP_WITH_SRP
case EAPT_SRP:
if (len < 3)
goto truncated;
if (uval != 0) {
printer(arg, " f<%X>", uval);
}
- if ((vallen = len) > SHA_DIGESTSIZE)
- vallen = SHA_DIGESTSIZE;
+ if ((vallen = len) > SHA_DIGEST_LENGTH)
+ vallen = SHA_DIGEST_LENGTH;
printer(arg, " <M2%.*B%s>", len, inp,
- len < SHA_DIGESTSIZE ? "?" : "");
+ len < SHA_DIGEST_LENGTH ? "?" : "");
INCPTR(vallen, inp);
len -= vallen;
if (len > 0) {
break;
}
break;
+#endif /* PPP_WITH_SRP */
}
break;
}
break;
-#ifdef USE_EAPTLS
+#ifdef PPP_WITH_EAPTLS
case EAPT_TLS:
if (len < 1)
break;
printer(arg, flags & EAP_TLS_FLAGS_START ? "S":"- ");
break;
-#endif /* USE_EAPTLS */
+#endif /* PPP_WITH_EAPTLS */
case EAPT_NAK:
if (len <= 0) {
len--;
printer(arg, " <Suggested-type %02X", rtype);
if (rtype >= 1 &&
- rtype < sizeof (eap_typenames) / sizeof (char *))
+ rtype <= sizeof (eap_typenames) / sizeof (char *))
printer(arg, " (%s)", eap_typenames[rtype-1]);
printer(arg, ">");
break;
}
break;
-#ifdef CHAPMS
+#ifdef PPP_WITH_CHAPMS
case EAPT_MSCHAPV2:
if (len <= 0)
break;
break;
}
break;
-#endif /* CHAPMS */
+#endif /* PPP_WITH_CHAPMS */
+#ifdef PPP_WITH_SRP
case EAPT_SRP:
if (len < 1)
goto truncated;
printer(arg, " f<%X>", uval);
}
printer(arg, " <M1%.*B%s>", len, inp,
- len == SHA_DIGESTSIZE ? "" : "?");
+ len == SHA_DIGEST_LENGTH ? "" : "?");
INCPTR(len, inp);
len = 0;
break;
case EAPSRP_LWRECHALLENGE:
printer(arg, " <Response%.*B%s>", len, inp,
- len == SHA_DIGESTSIZE ? "" : "?");
- if ((vallen = len) > SHA_DIGESTSIZE)
- vallen = SHA_DIGESTSIZE;
+ len == SHA_DIGEST_LENGTH ? "" : "?");
+ if ((vallen = len) > SHA_DIGEST_LENGTH)
+ vallen = SHA_DIGEST_LENGTH;
INCPTR(vallen, inp);
len -= vallen;
break;
}
break;
+#endif /* PPP_WITH_SRP */
}
break;
projects / ppp.git / blobdiff