-/***********************************************************************
- * Copyright (C) 2000 The FreeRADIUS server project.
+/*
+ * rlm_mschap.c
+ *
+ * Version: $Id$
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
- * This program is is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 if the
- * License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- ***********************************************************************/
+ * Copyright 2000,2001,2006 The FreeRADIUS server project
+ */
+
+/* MPPE support from Takahiro Wagatsuma <waga@sic.shibaura-it.ac.jp> */
+
+#include <freeradius-devel/ident.h>
+RCSID("$Id$")
+
+#include <freeradius-devel/radiusd.h>
+#include <freeradius-devel/modules.h>
+#include <freeradius-devel/rad_assert.h>
+#include <freeradius-devel/md5.h>
+#include <freeradius-devel/sha1.h>
+
+#include <ctype.h>
+
+#include "mschap.h"
+#include "smbdes.h"
+
+#ifdef __APPLE__
+extern int od_mschap_auth(REQUEST *request, VALUE_PAIR *challenge, VALUE_PAIR * usernamepair);
+#endif
+
+/* Allowable account control bits */
+#define ACB_DISABLED 0x0001 /* 1 = User account disabled */
+#define ACB_HOMDIRREQ 0x0002 /* 1 = Home directory required */
+#define ACB_PWNOTREQ 0x0004 /* 1 = User password not required */
+#define ACB_TEMPDUP 0x0008 /* 1 = Temporary duplicate account */
+#define ACB_NORMAL 0x0010 /* 1 = Normal user account */
+#define ACB_MNS 0x0020 /* 1 = MNS logon user account */
+#define ACB_DOMTRUST 0x0040 /* 1 = Interdomain trust account */
+#define ACB_WSTRUST 0x0080 /* 1 = Workstation trust account */
+#define ACB_SVRTRUST 0x0100 /* 1 = Server trust account */
+#define ACB_PWNOEXP 0x0200 /* 1 = User password does not expire */
+#define ACB_AUTOLOCK 0x0400 /* 1 = Account auto locked */
+
+static int pdb_decode_acct_ctrl(const char *p)
+{
+ int acct_ctrl = 0;
+ int finished = 0;
+
+ /*
+ * Check if the account type bits have been encoded after the
+ * NT password (in the form [NDHTUWSLXI]).
+ */
+
+ if (*p != '[') return 0;
+
+ for (p++; *p && !finished; p++) {
+ switch (*p) {
+ case 'N': /* 'N'o password. */
+ acct_ctrl |= ACB_PWNOTREQ;
+ break;
+
+ case 'D': /* 'D'isabled. */
+ acct_ctrl |= ACB_DISABLED ;
+ break;
+
+ case 'H': /* 'H'omedir required. */
+ acct_ctrl |= ACB_HOMDIRREQ;
+ break;
+
+ case 'T': /* 'T'emp account. */
+ acct_ctrl |= ACB_TEMPDUP;
+ break;
+
+ case 'U': /* 'U'ser account (normal). */
+ acct_ctrl |= ACB_NORMAL;
+ break;
+
+ case 'M': /* 'M'NS logon user account. What is this? */
+ acct_ctrl |= ACB_MNS;
+ break;
+
+ case 'W': /* 'W'orkstation account. */
+ acct_ctrl |= ACB_WSTRUST;
+ break;
+
+ case 'S': /* 'S'erver account. */
+ acct_ctrl |= ACB_SVRTRUST;
+ break;
+
+ case 'L': /* 'L'ocked account. */
+ acct_ctrl |= ACB_AUTOLOCK;
+ break;
+
+ case 'X': /* No 'X'piry on password */
+ acct_ctrl |= ACB_PWNOEXP;
+ break;
+
+ case 'I': /* 'I'nterdomain trust account. */
+ acct_ctrl |= ACB_DOMTRUST;
+ break;
+
+ case ' ': /* ignore spaces */
+ break;
+
+ case ':':
+ case '\n':
+ case '\0':
+ case ']':
+ default:
+ finished = 1;
+ break;
+ }
+ }
+
+ return acct_ctrl;
+}
+
+
+typedef struct rlm_mschap_t {
+ int use_mppe;
+ int require_encryption;
+ int require_strong;
+ int with_ntdomain_hack; /* this should be in another module */
+ char *passwd_file;
+ const char *xlat_name;
+ char *ntlm_auth;
+ const char *auth_type;
+#ifdef __APPLE__
+ int open_directory;
+#endif
+} rlm_mschap_t;
+
/*
- * mschap.c MS-CHAP module
- *
- * Jay Miller jaymiller@socket.net
+ * Does dynamic translation of strings.
*
+ * Pulls NT-Response, LM-Response, or Challenge from MSCHAP
+ * attributes.
*/
+static size_t mschap_xlat(void *instance, REQUEST *request,
+ char *fmt, char *out, size_t outlen,
+ RADIUS_ESCAPE_STRING func)
+{
+ size_t i, data_len;
+ uint8_t *data = NULL;
+ uint8_t buffer[32];
+ VALUE_PAIR *user_name;
+ VALUE_PAIR *chap_challenge, *response;
+ rlm_mschap_t *inst = instance;
+
+ response = NULL;
+
+ func = func; /* -Wunused */
+
+ /*
+ * Challenge means MS-CHAPv1 challenge, or
+ * hash of MS-CHAPv2 challenge, and peer challenge.
+ */
+ if (strncasecmp(fmt, "Challenge", 9) == 0) {
+ chap_challenge = pairfind(request->packet->vps,
+ PW_MSCHAP_CHALLENGE,
+ VENDORPEC_MICROSOFT);
+ if (!chap_challenge) {
+ RDEBUG2("No MS-CHAP-Challenge in the request.");
+ return 0;
+ }
+
+ /*
+ * MS-CHAP-Challenges are 8 octets,
+ * for MS-CHAPv2
+ */
+ if (chap_challenge->length == 8) {
+ RDEBUG2(" mschap1: %02x",
+ chap_challenge->vp_octets[0]);
+ data = chap_challenge->vp_octets;
+ data_len = 8;
+
+ /*
+ * MS-CHAP-Challenges are 16 octets,
+ * for MS-CHAPv2.
+ */
+ } else if (chap_challenge->length == 16) {
+ VALUE_PAIR *name_attr, *response_name;
+ char *username_string;
+
+ RDEBUG2(" mschap2: %02x", chap_challenge->vp_octets[0]);
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP2_RESPONSE,
+ VENDORPEC_MICROSOFT);
+ if (!response) {
+ RDEBUG2("MS-CHAP2-Response is required to calculate MS-CHAPv1 challenge.");
+ return 0;
+ }
+
+ /*
+ * FIXME: Much of this is copied from
+ * below. We should put it into a
+ * separate function.
+ */
+
+ /*
+ * Responses are 50 octets.
+ */
+ if (response->length < 50) {
+ radlog_request(L_AUTH, 0, request, "MS-CHAP-Response has the wrong format.");
+ return 0;
+ }
+
+ user_name = pairfind(request->packet->vps,
+ PW_USER_NAME, 0);
+ if (!user_name) {
+ RDEBUG2("User-Name is required to calculate MS-CHAPv1 Challenge.");
+ return 0;
+ }
+
+ /*
+ * Check for MS-CHAP-User-Name and if found, use it
+ * to construct the MSCHAPv1 challenge. This is
+ * set by rlm_eap_mschap to the MS-CHAP Response
+ * packet Name field.
+ *
+ * We prefer this to the User-Name in the
+ * packet.
+ */
+ response_name = pairfind(request->packet->vps, PW_MS_CHAP_USER_NAME, 0);
+ if (response_name) {
+ name_attr = response_name;
+ } else {
+ name_attr = user_name;
+ }
+
+ /*
+ * with_ntdomain_hack moved here, too.
+ */
+ if ((username_string = strchr(name_attr->vp_strvalue, '\\')) != NULL) {
+ if (inst->with_ntdomain_hack) {
+ username_string++;
+ } else {
+ RDEBUG2("NT Domain delimeter found, should we have enabled with_ntdomain_hack?");
+ username_string = name_attr->vp_strvalue;
+ }
+ } else {
+ username_string = name_attr->vp_strvalue;
+ }
+
+ if (response_name &&
+ ((user_name->length != response_name->length) ||
+ (strncasecmp(user_name->vp_strvalue, response_name->vp_strvalue, user_name->length) != 0))) {
+ RDEBUG("WARNING: User-Name (%s) is not the same as MS-CHAP Name (%s) from EAP-MSCHAPv2", user_name->vp_strvalue, response_name->vp_strvalue);
+ }
+
+ /*
+ * Get the MS-CHAPv1 challenge
+ * from the MS-CHAPv2 peer challenge,
+ * our challenge, and the user name.
+ */
+ RDEBUG2("Creating challenge hash with username: %s",
+ username_string);
+ mschap_challenge_hash(response->vp_octets + 2,
+ chap_challenge->vp_octets,
+ username_string, buffer);
+ data = buffer;
+ data_len = 8;
+ } else {
+ RDEBUG2("Invalid MS-CHAP challenge length");
+ return 0;
+ }
+
+ /*
+ * Get the MS-CHAPv1 response, or the MS-CHAPv2
+ * response.
+ */
+ } else if (strncasecmp(fmt, "NT-Response", 11) == 0) {
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP_RESPONSE, VENDORPEC_MICROSOFT);
+ if (!response) response = pairfind(request->packet->vps,
+ PW_MSCHAP2_RESPONSE,
+ VENDORPEC_MICROSOFT);
+ if (!response) {
+ RDEBUG2("No MS-CHAP-Response or MS-CHAP2-Response was found in the request.");
+ return 0;
+ }
+
+ /*
+ * For MS-CHAPv1, the NT-Response exists only
+ * if the second octet says so.
+ */
+ if ((response->attribute == PW_MSCHAP_RESPONSE) &&
+ ((response->vp_octets[1] & 0x01) == 0)) {
+ RDEBUG2("No NT-Response in MS-CHAP-Response");
+ return 0;
+ }
+
+ /*
+ * MS-CHAP-Response and MS-CHAP2-Response have
+ * the NT-Response at the same offset, and are
+ * the same length.
+ */
+ data = response->vp_octets + 26;
+ data_len = 24;
+
+ /*
+ * LM-Response is deprecated, and exists only
+ * in MS-CHAPv1, and not often there.
+ */
+ } else if (strncasecmp(fmt, "LM-Response", 11) == 0) {
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP_RESPONSE, VENDORPEC_MICROSOFT);
+ if (!response) {
+ RDEBUG2("No MS-CHAP-Response was found in the request.");
+ return 0;
+ }
+
+ /*
+ * For MS-CHAPv1, the NT-Response exists only
+ * if the second octet says so.
+ */
+ if ((response->vp_octets[1] & 0x01) != 0) {
+ RDEBUG2("No LM-Response in MS-CHAP-Response");
+ return 0;
+ }
+ data = response->vp_octets + 2;
+ data_len = 24;
+
+ /*
+ * Pull the NT-Domain out of the User-Name, if it exists.
+ */
+ } else if (strncasecmp(fmt, "NT-Domain", 9) == 0) {
+ char *p, *q;
+
+ user_name = pairfind(request->packet->vps, PW_USER_NAME, 0);
+ if (!user_name) {
+ RDEBUG2("No User-Name was found in the request.");
+ return 0;
+ }
+
+ /*
+ * First check to see if this is a host/ style User-Name
+ * (a la Kerberos host principal)
+ */
+ if (strncmp(user_name->vp_strvalue, "host/", 5) == 0) {
+ /*
+ * If we're getting a User-Name formatted in this way,
+ * it's likely due to PEAP. The Windows Domain will be
+ * the first domain component following the hostname,
+ * or the machine name itself if only a hostname is supplied
+ */
+ p = strchr(user_name->vp_strvalue, '.');
+ if (!p) {
+ RDEBUG2("setting NT-Domain to same as machine name");
+ strlcpy(out, user_name->vp_strvalue + 5, outlen);
+ } else {
+ p++; /* skip the period */
+ q = strchr(p, '.');
+ /*
+ * use the same hack as below
+ * only if another period was found
+ */
+ if (q) *q = '\0';
+ strlcpy(out, p, outlen);
+ if (q) *q = '.';
+ }
+ } else {
+ p = strchr(user_name->vp_strvalue, '\\');
+ if (!p) {
+ RDEBUG2("No NT-Domain was found in the User-Name.");
+ return 0;
+ }
+
+ /*
+ * Hack. This is simpler than the alternatives.
+ */
+ *p = '\0';
+ strlcpy(out, user_name->vp_strvalue, outlen);
+ *p = '\\';
+ }
+
+ return strlen(out);
-#include "autoconf.h"
-#include "libradius.h"
+ /*
+ * Pull the User-Name out of the User-Name...
+ */
+ } else if (strncasecmp(fmt, "User-Name", 9) == 0) {
+ char *p;
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+ user_name = pairfind(request->packet->vps, PW_USER_NAME, 0);
+ if (!user_name) {
+ RDEBUG2("No User-Name was found in the request.");
+ return 0;
+ }
-#include "radiusd.h"
-#include "modules.h"
+ /*
+ * First check to see if this is a host/ style User-Name
+ * (a la Kerberos host principal)
+ */
+ if (strncmp(user_name->vp_strvalue, "host/", 5) == 0) {
+ /*
+ * If we're getting a User-Name formatted in this way,
+ * it's likely due to PEAP. When authenticating this against
+ * a Domain, Windows will expect the User-Name to be in the
+ * format of hostname$, the SAM version of the name, so we
+ * have to convert it to that here. We do so by stripping
+ * off the first 5 characters (host/), and copying everything
+ * from that point to the first period into a string and appending
+ * a $ to the end.
+ */
+ p = strchr(user_name->vp_strvalue, '.');
+ /*
+ * use the same hack as above
+ * only if a period was found
+ */
+ if (p) *p = '\0';
+ snprintf(out, outlen, "%s$", user_name->vp_strvalue + 5);
+ if (p) *p = '.';
+ } else {
+ p = strchr(user_name->vp_strvalue, '\\');
+ if (p) {
+ p++; /* skip the backslash */
+ } else {
+ p = user_name->vp_strvalue; /* use the whole User-Name */
+ }
+ strlcpy(out, p, outlen);
+ }
-#include "des.h"
-#include "md4.h"
+ return strlen(out);
-#define PW_MSCHAP_RESPONSE ((311 << 16) | 1)
-#define PW_MSCHAP_CHALLENGE ((311 << 16) | 11)
+ /*
+ * Return the NT-Hash of the passed string
+ */
+ } else if (strncasecmp(fmt, "NT-Hash ", 8) == 0) {
+ char *p;
+ char buf2[1024];
-static void parity_key(char * szOut, const char * szIn);
-static void des_encrypt(const char *szClear, const char *szKey, char *szOut);
-static void mschap(const char *szChallenge, const char *szPassword, char *szResponse);
+ p = fmt + 8; /* 7 is the length of 'NT-Hash' */
+ if ((p == '\0') || (outlen <= 32))
+ return 0;
-/*
- * parity_key takes a 7-byte string in szIn and returns an
- * 8-byte string in szOut. It inserts a 1 into every 8th bit.
- * DES just strips these back out.
+ while (isspace(*p)) p++;
+
+ if (!radius_xlat(buf2, sizeof(buf2),p,request,NULL)) {
+ RDEBUG("xlat failed");
+ *buffer = '\0';
+ return 0;
+ }
+
+ mschap_ntpwdhash(buffer,buf2);
+
+ fr_bin2hex(buffer, out, 16);
+ out[32] = '\0';
+ RDEBUG("NT-Hash of %s = %s", buf2, out);
+ return 32;
+
+ /*
+ * Return the LM-Hash of the passed string
+ */
+ } else if (strncasecmp(fmt, "LM-Hash ", 8) == 0) {
+ char *p;
+ char buf2[1024];
+
+ p = fmt + 8; /* 7 is the length of 'LM-Hash' */
+ if ((p == '\0') || (outlen <= 32))
+ return 0;
+
+ while (isspace(*p)) p++;
+
+ if (!radius_xlat(buf2, sizeof(buf2),p,request,NULL)) {
+ RDEBUG("xlat failed");
+ *buffer = '\0';
+ return 0;
+ }
+
+ smbdes_lmpwdhash(buf2, buffer);
+ fr_bin2hex(buffer, out, 16);
+ out[32] = '\0';
+ RDEBUG("LM-Hash of %s = %s", buf2, out);
+ return 32;
+ } else {
+ RDEBUG2("Unknown expansion string \"%s\"",
+ fmt);
+ return 0;
+ }
+
+ if (outlen == 0) return 0; /* nowhere to go, don't do anything */
+
+ /*
+ * Didn't set anything: this is bad.
+ */
+ if (!data) {
+ RDEBUG2("Failed to do anything intelligent");
+ return 0;
+ }
+
+ /*
+ * Check the output length.
+ */
+ if (outlen < ((data_len * 2) + 1)) {
+ data_len = (outlen - 1) / 2;
+ }
+
+ /*
+ *
+ */
+ for (i = 0; i < data_len; i++) {
+ sprintf(out + (2 * i), "%02x", data[i]);
+ }
+ out[data_len * 2] = '\0';
+
+ return data_len * 2;
+}
+
+
+static const CONF_PARSER module_config[] = {
+ /*
+ * Cache the password by default.
+ */
+ { "use_mppe", PW_TYPE_BOOLEAN,
+ offsetof(rlm_mschap_t,use_mppe), NULL, "yes" },
+ { "require_encryption", PW_TYPE_BOOLEAN,
+ offsetof(rlm_mschap_t,require_encryption), NULL, "no" },
+ { "require_strong", PW_TYPE_BOOLEAN,
+ offsetof(rlm_mschap_t,require_strong), NULL, "no" },
+ { "with_ntdomain_hack", PW_TYPE_BOOLEAN,
+ offsetof(rlm_mschap_t,with_ntdomain_hack), NULL, "no" },
+ { "passwd", PW_TYPE_STRING_PTR,
+ offsetof(rlm_mschap_t, passwd_file), NULL, NULL },
+ { "ntlm_auth", PW_TYPE_STRING_PTR,
+ offsetof(rlm_mschap_t, ntlm_auth), NULL, NULL },
+#ifdef __APPLE__
+ { "use_open_directory", PW_TYPE_BOOLEAN,
+ offsetof(rlm_mschap_t,open_directory), NULL, "yes" },
+#endif
+
+ { NULL, -1, 0, NULL, NULL } /* end the list */
+};
+
+/*
+ * deinstantiate module, free all memory allocated during
+ * mschap_instantiate()
+ */
+static int mschap_detach(void *instance){
+#define inst ((rlm_mschap_t *)instance)
+ if (inst->xlat_name) {
+ xlat_unregister(inst->xlat_name, mschap_xlat);
+ free(inst->xlat_name);
+ }
+ free(instance);
+ return 0;
+#undef inst
+}
+
+/*
+ * Create instance for our module. Allocate space for
+ * instance structure and read configuration parameters
*/
-static void parity_key(char * szOut, const char * szIn) {
- int i;
- unsigned char cNext = 0;
- unsigned char cWorking = 0;
-
- for (i = 0; i < 7; i++) {
- /* Shift operator works in place. Copy the char out */
- cWorking = szIn[i];
- szOut[i] = (cWorking >> i) | cNext | 1;
- cWorking = szIn[i];
- cNext = (cWorking << (7 - i));
- }
- szOut[i] = cNext | 1;
+static int mschap_instantiate(CONF_SECTION *conf, void **instance)
+{
+ rlm_mschap_t *inst;
+
+ inst = *instance = rad_malloc(sizeof(*inst));
+ if (!inst) {
+ return -1;
+ }
+ memset(inst, 0, sizeof(*inst));
+
+ if (cf_section_parse(conf, inst, module_config) < 0) {
+ free(inst);
+ return -1;
+ }
+
+ /*
+ * This module used to support SMB Password files, but it
+ * made it too complicated. If the user tries to
+ * configure an SMB Password file, then die, with an
+ * error message.
+ */
+ if (inst->passwd_file) {
+ radlog(L_ERR, "rlm_mschap: SMB password file is no longer supported in this module. Use rlm_passwd module instead");
+ mschap_detach(inst);
+ return -1;
+ }
+
+ /*
+ * Create the dynamic translation.
+ */
+ inst->xlat_name = cf_section_name2(conf);
+ if (!inst->xlat_name) inst->xlat_name = cf_section_name1(conf);
+ inst->xlat_name = strdup(inst->xlat_name);
+ xlat_register(inst->xlat_name, mschap_xlat, inst);
+
+ /*
+ * For backwards compatibility
+ */
+ if (!dict_valbyname(PW_AUTH_TYPE, 0, inst->xlat_name)) {
+ inst->auth_type = "MS-CHAP";
+ } else {
+ inst->auth_type = inst->xlat_name;
+ }
+
+ return 0;
}
/*
- * des_encrypt takes an 8-byte string and a 7-byte key and
- * returns an 8-byte DES encrypted string in szOut
+ * add_reply() adds either MS-CHAP2-Success or MS-CHAP-Error
+ * attribute to reply packet
*/
-static void des_encrypt(const char *szClear, const char *szKey, char *szOut) {
- char szParityKey[9];
- unsigned long ulK[16][2];
-
- parity_key(szParityKey, szKey); /* Insert parity bits */
- strncpy(szOut, szClear, 8); /* des encrypts in place */
- deskey(ulK, (unsigned char *) szParityKey, 0); /* generate keypair */
- des(ulK, szOut); /* encrypt */
+void mschap_add_reply(REQUEST *request, VALUE_PAIR** vp, unsigned char ident,
+ const char* name, const char* value, int len)
+{
+ VALUE_PAIR *reply_attr;
+ reply_attr = pairmake(name, "", T_OP_EQ);
+ if (!reply_attr) {
+ RDEBUG("Failed to create attribute %s: %s\n", name, fr_strerror());
+ return;
+ }
+
+ reply_attr->vp_octets[0] = ident;
+ memcpy(reply_attr->vp_octets + 1, value, len);
+ reply_attr->length = len + 1;
+ pairadd(vp, reply_attr);
}
/*
- * mschap takes an 8-byte challenge string and a plain text
- * password (up to 253 bytes) and returns a 24-byte response
- * string in szResponse
+ * Add MPPE attributes to the reply.
*/
-static void mschap(const char *szChallenge, const char *szPassword, char *szResponse) {
- char szMD4[21];
- char szUnicodePass[513];
- char nPasswordLen;
- int i;
-
- /* initialize hash string */
- for (i = 0; i < 21; i++) {
- szMD4[i] = '\0';
- }
-
- /*
- * Microsoft passwords are unicode. Convert plain text password
- * to unicode by inserting a zero every other byte
- */
- nPasswordLen = strlen(szPassword);
- for (i = 0; i < nPasswordLen; i++) {
- szUnicodePass[2 * i] = szPassword[i];
- szUnicodePass[2 * i + 1] = 0;
- }
-
- /* Encrypt plain text password to a 16-byte MD4 hash */
- md4_calc(szMD4, szUnicodePass, nPasswordLen * 2);
-
+static void mppe_add_reply(REQUEST *request,
+ const char* name, const uint8_t * value, int len)
+{
+ VALUE_PAIR *vp;
+ vp = radius_pairmake(request, &request->reply->vps, name, "", T_OP_EQ);
+ if (!vp) {
+ RDEBUG("rlm_mschap: mppe_add_reply failed to create attribute %s: %s\n", name, fr_strerror());
+ return;
+ }
+
+ memcpy(vp->vp_octets, value, len);
+ vp->length = len;
+}
+
+
+/*
+ * Do the MS-CHAP stuff.
+ *
+ * This function is here so that all of the MS-CHAP related
+ * authentication is in one place, and we can perhaps later replace
+ * it with code to call winbindd, or something similar.
+ */
+static int do_mschap(rlm_mschap_t *inst,
+ REQUEST *request, VALUE_PAIR *password,
+ uint8_t *challenge, uint8_t *response,
+ uint8_t *nthashhash, int do_ntlm_auth)
+{
+ uint8_t calculated[24];
+
/*
- *
- * challenge_response takes an 8-byte challenge string and a
- * 21-byte hash (16-byte hash padded to 21 bytes with zeros) and
- * returns a 24-byte response in szResponse
+ * Do normal authentication.
*/
- des_encrypt(szChallenge, szMD4, szResponse);
- des_encrypt(szChallenge, szMD4 + 7, szResponse + 8);
- des_encrypt(szChallenge, szMD4 + 14, szResponse + 16);
-}
+ if (!do_ntlm_auth) {
+ /*
+ * No password: can't do authentication.
+ */
+ if (!password) {
+ RDEBUG2("FAILED: No NT/LM-Password. Cannot perform authentication.");
+ return -1;
+ }
+
+ smbdes_mschap(password->vp_strvalue, challenge, calculated);
+ if (memcmp(response, calculated, 24) != 0) {
+ return -1;
+ }
+
+ /*
+ * If the password exists, and is an NT-Password,
+ * then calculate the hash of the NT hash. Doing this
+ * here minimizes work for later.
+ */
+ if (password && (password->attribute == PW_NT_PASSWORD)) {
+ fr_md4_calc(nthashhash, password->vp_octets, 16);
+ } else {
+ memset(nthashhash, 0, 16);
+ }
+ } else { /* run ntlm_auth */
+ int result;
+ char buffer[256];
+
+ memset(nthashhash, 0, 16);
+
+ /*
+ * Run the program, and expect that we get 16
+ */
+ result = radius_exec_program(inst->ntlm_auth, request,
+ TRUE, /* wait */
+ buffer, sizeof(buffer),
+ NULL, NULL, 1);
+ if (result != 0) {
+ char *p;
+ VALUE_PAIR *vp = NULL;
+
+ RDEBUG2("External script failed.");
+
+ vp = pairmake("Module-Failure-Message", "", T_OP_EQ);
+ if (!vp) {
+ radlog_request(L_ERR, 0, request, "No memory to allocate Module-Failure-Message");
+ return RLM_MODULE_FAIL;
+ }
+
+ p = strchr(buffer, '\n');
+ if (p) *p = '\0';
+ snprintf(vp->vp_strvalue, sizeof(vp->vp_strvalue),
+ "%s: External script says %s",
+ inst->xlat_name, buffer);
+ vp->length = strlen(vp->vp_strvalue);
+ pairadd(&request->reply->vps, vp);
+ return -1;
+ }
+
+ /*
+ * Parse the answer as an nthashhash.
+ *
+ * ntlm_auth currently returns:
+ * NT_KEY: 000102030405060708090a0b0c0d0e0f
+ */
+ if (memcmp(buffer, "NT_KEY: ", 8) != 0) {
+ RDEBUG2("Invalid output from ntlm_auth: expecting NT_KEY");
+ return -1;
+ }
+
+ /*
+ * Check the length. It should be at least 32,
+ * with an LF at the end.
+ */
+ if (strlen(buffer + 8) < 32) {
+ RDEBUG2("Invalid output from ntlm_auth: NT_KEY has unexpected length");
+ return -1;
+ }
+
+ /*
+ * Update the NT hash hash, from the NT key.
+ */
+ if (fr_hex2bin(buffer + 8, nthashhash, 16) != 16) {
+ RDEBUG2("Invalid output from ntlm_auth: NT_KEY has non-hex values");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+/*
+ * Data for the hashes.
+ */
+static const uint8_t SHSpad1[40] =
+ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+static const uint8_t SHSpad2[40] =
+ { 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
+ 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
+ 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
+ 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2 };
+
+static const uint8_t magic1[27] =
+ { 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74,
+ 0x68, 0x65, 0x20, 0x4d, 0x50, 0x50, 0x45, 0x20, 0x4d,
+ 0x61, 0x73, 0x74, 0x65, 0x72, 0x20, 0x4b, 0x65, 0x79 };
+
+static const uint8_t magic2[84] =
+ { 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69,
+ 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20,
+ 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
+ 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20, 0x6b, 0x65, 0x79,
+ 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73,
+ 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73, 0x69, 0x64, 0x65,
+ 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
+ 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20,
+ 0x6b, 0x65, 0x79, 0x2e };
+
+static const uint8_t magic3[84] =
+ { 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69,
+ 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20,
+ 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
+ 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20,
+ 0x6b, 0x65, 0x79, 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68,
+ 0x65, 0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73,
+ 0x69, 0x64, 0x65, 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73,
+ 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20,
+ 0x6b, 0x65, 0x79, 0x2e };
+
+
+static void mppe_GetMasterKey(uint8_t *nt_hashhash,uint8_t *nt_response,
+ uint8_t *masterkey)
+{
+ uint8_t digest[20];
+ fr_SHA1_CTX Context;
+
+ fr_SHA1Init(&Context);
+ fr_SHA1Update(&Context,nt_hashhash,16);
+ fr_SHA1Update(&Context,nt_response,24);
+ fr_SHA1Update(&Context,magic1,27);
+ fr_SHA1Final(digest,&Context);
+
+ memcpy(masterkey,digest,16);
+}
-/* validate userid/passwd */
-static int mschap_auth(void *instance, REQUEST *request)
+static void mppe_GetAsymmetricStartKey(uint8_t *masterkey,uint8_t *sesskey,
+ int keylen,int issend)
{
- VALUE_PAIR *challenge, *response;
- uint8_t calculated[32];
+ uint8_t digest[20];
+ const uint8_t *s;
+ fr_SHA1_CTX Context;
- instance = instance; /* -Wunused */
+ memset(digest,0,20);
+
+ if(issend) {
+ s = magic3;
+ } else {
+ s = magic2;
+ }
+
+ fr_SHA1Init(&Context);
+ fr_SHA1Update(&Context,masterkey,16);
+ fr_SHA1Update(&Context,SHSpad1,40);
+ fr_SHA1Update(&Context,s,84);
+ fr_SHA1Update(&Context,SHSpad2,40);
+ fr_SHA1Final(digest,&Context);
+
+ memcpy(sesskey,digest,keylen);
+}
+
+
+static void mppe_chap2_get_keys128(uint8_t *nt_hashhash,uint8_t *nt_response,
+ uint8_t *sendkey,uint8_t *recvkey)
+{
+ uint8_t masterkey[16];
+
+ mppe_GetMasterKey(nt_hashhash,nt_response,masterkey);
+
+ mppe_GetAsymmetricStartKey(masterkey,sendkey,16,1);
+ mppe_GetAsymmetricStartKey(masterkey,recvkey,16,0);
+}
+
+/*
+ * Generate MPPE keys.
+ */
+static void mppe_chap2_gen_keys128(uint8_t *nt_hashhash,uint8_t *response,
+ uint8_t *sendkey,uint8_t *recvkey)
+{
+ uint8_t enckey1[16];
+ uint8_t enckey2[16];
+
+ mppe_chap2_get_keys128(nt_hashhash,response,enckey1,enckey2);
/*
- * We need an MS-CHAP-Challenge attribute to calculate
- * the response.
+ * dictionary.microsoft defines these attributes as
+ * 'encrypt=2'. The functions in src/lib/radius.c will
+ * take care of encrypting/decrypting them as appropriate,
+ * so that we don't have to.
*/
- challenge = pairfind(request->packet->vps, PW_MSCHAP_CHALLENGE);
+ memcpy (sendkey, enckey1, 16);
+ memcpy (recvkey, enckey2, 16);
+}
+
+
+/*
+ * mschap_authorize() - authorize user if we can authenticate
+ * it later. Add Auth-Type attribute if present in module
+ * configuration (usually Auth-Type must be "MS-CHAP")
+ */
+static int mschap_authorize(void * instance, REQUEST *request)
+{
+#define inst ((rlm_mschap_t *)instance)
+ VALUE_PAIR *challenge = NULL, *response = NULL;
+
+ challenge = pairfind(request->packet->vps,
+ PW_MSCHAP_CHALLENGE,
+ VENDORPEC_MICROSOFT);
if (!challenge) {
- radlog(L_AUTH, "rlm_mschap: Attribute \"MS-CHAP-Challenge\" is required for authentication.");
- return RLM_MODULE_INVALID;
+ return RLM_MODULE_NOOP;
}
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP_RESPONSE,
+ VENDORPEC_MICROSOFT);
+ if (!response)
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP2_RESPONSE,
+ VENDORPEC_MICROSOFT);
+
/*
- * We need an MS-CHAP-Challenge attribute to calculate
- * the response.
+ * Nothing we recognize. Don't do anything.
*/
- response = pairfind(request->packet->vps, PW_MSCHAP_RESPONSE);
if (!response) {
- radlog(L_AUTH, "rlm_mschap: Attribute \"MS-CHAP-Response\" is required for authentication.");
- return RLM_MODULE_INVALID;
+ RDEBUG2("Found MS-CHAP-Challenge, but no MS-CHAP-Response.");
+ return RLM_MODULE_NOOP;
+ }
+
+ if (pairfind(request->config_items, PW_AUTH_TYPE, 0)) {
+ RDEBUG2("WARNING: Auth-Type already set. Not setting to MS-CHAP");
+ return RLM_MODULE_NOOP;
}
+ RDEBUG2("Found MS-CHAP attributes. Setting 'Auth-Type = %s'", inst->xlat_name);
+
/*
- * We can only authenticate user requests which HAVE
- * a Password attribute.
+ * Set Auth-Type to MS-CHAP. The authentication code
+ * will take care of turning clear-text passwords into
+ * NT/LM passwords.
*/
- if (!request->password) {
- radlog(L_AUTH, "rlm_mschap: Attribute \"Password\" is required for authentication.");
- return RLM_MODULE_INVALID;
+ if (!radius_pairmake(request, &request->config_items,
+ "Auth-Type", inst->auth_type, T_OP_EQ)) {
+ return RLM_MODULE_FAIL;
+ }
+
+ return RLM_MODULE_OK;
+#undef inst
+}
+
+/*
+ * mschap_authenticate() - authenticate user based on given
+ * attributes and configuration.
+ * We will try to find out password in configuration
+ * or in configured passwd file.
+ * If one is found we will check paraneters given by NAS.
+ *
+ * If PW_SMB_ACCOUNT_CTRL is not set to ACB_PWNOTREQ we must have
+ * one of:
+ * PAP: PW_USER_PASSWORD or
+ * MS-CHAP: PW_MSCHAP_CHALLENGE and PW_MSCHAP_RESPONSE or
+ * MS-CHAP2: PW_MSCHAP_CHALLENGE and PW_MSCHAP2_RESPONSE
+ * In case of password mismatch or locked account we MAY return
+ * PW_MSCHAP_ERROR for MS-CHAP or MS-CHAP v2
+ * If MS-CHAP2 succeeds we MUST return
+ * PW_MSCHAP2_SUCCESS
+ */
+static int mschap_authenticate(void * instance, REQUEST *request)
+{
+#define inst ((rlm_mschap_t *)instance)
+ VALUE_PAIR *challenge = NULL;
+ VALUE_PAIR *response = NULL;
+ VALUE_PAIR *password = NULL;
+ VALUE_PAIR *lm_password, *nt_password, *smb_ctrl;
+ VALUE_PAIR *username;
+ uint8_t nthashhash[16];
+ char msch2resp[42];
+ char *username_string;
+ int chap = 0;
+ int do_ntlm_auth;
+
+ /*
+ * If we have ntlm_auth configured, use it unless told
+ * otherwise
+ */
+ do_ntlm_auth = (inst->ntlm_auth != NULL);
+
+ /*
+ * If we have an ntlm_auth configuration, then we may
+ * want to suppress it.
+ */
+ if (do_ntlm_auth) {
+ VALUE_PAIR *vp = pairfind(request->config_items,
+ PW_MS_CHAP_USE_NTLM_AUTH, 0);
+ if (vp) do_ntlm_auth = vp->vp_integer;
+ }
+
+ /*
+ * Find the SMB-Account-Ctrl attribute, or the
+ * SMB-Account-Ctrl-Text attribute.
+ */
+ smb_ctrl = pairfind(request->config_items, PW_SMB_ACCOUNT_CTRL, 0);
+ if (!smb_ctrl) {
+ password = pairfind(request->config_items,
+ PW_SMB_ACCOUNT_CTRL_TEXT, 0);
+ if (password) {
+ smb_ctrl = radius_pairmake(request,
+ &request->config_items,
+ "SMB-Account-CTRL", "0",
+ T_OP_SET);
+ if (smb_ctrl) {
+ smb_ctrl->vp_integer = pdb_decode_acct_ctrl(password->vp_strvalue);
+ }
+ }
+ }
+
+ /*
+ * We're configured to do MS-CHAP authentication.
+ * and account control information exists. Enforce it.
+ */
+ if (smb_ctrl) {
+ /*
+ * Password is not required.
+ */
+ if ((smb_ctrl->vp_integer & ACB_PWNOTREQ) != 0) {
+ RDEBUG2("SMB-Account-Ctrl says no password is required.");
+ return RLM_MODULE_OK;
+ }
+ }
+
+ /*
+ * Decide how to get the passwords.
+ */
+ password = pairfind(request->config_items, PW_CLEARTEXT_PASSWORD, 0);
+
+ /*
+ * We need an LM-Password.
+ */
+ lm_password = pairfind(request->config_items, PW_LM_PASSWORD, 0);
+ if (lm_password) {
+ /*
+ * Allow raw octets.
+ */
+ if ((lm_password->length == 16) ||
+ ((lm_password->length == 32) &&
+ (fr_hex2bin(lm_password->vp_strvalue,
+ lm_password->vp_octets, 16) == 16))) {
+ RDEBUG2("Found LM-Password");
+ lm_password->length = 16;
+
+ } else {
+ radlog_request(L_ERR, 0, request, "Invalid LM-Password");
+ lm_password = NULL;
+ }
+
+ } else if (!password) {
+ if (!do_ntlm_auth) RDEBUG2("No Cleartext-Password configured. Cannot create LM-Password.");
+
+ } else { /* there is a configured Cleartext-Password */
+ lm_password = radius_pairmake(request, &request->config_items,
+ "LM-Password", "", T_OP_EQ);
+ if (!lm_password) {
+ radlog_request(L_ERR, 0, request, "No memory");
+ } else {
+ smbdes_lmpwdhash(password->vp_strvalue,
+ lm_password->vp_octets);
+ lm_password->length = 16;
+ }
+ }
+
+ /*
+ * We need an NT-Password.
+ */
+ nt_password = pairfind(request->config_items, PW_NT_PASSWORD, 0);
+ if (nt_password) {
+ if ((nt_password->length == 16) ||
+ ((nt_password->length == 32) &&
+ (fr_hex2bin(nt_password->vp_strvalue,
+ nt_password->vp_octets, 16) == 16))) {
+ RDEBUG2("Found NT-Password");
+ nt_password->length = 16;
+
+ } else {
+ radlog_request(L_ERR, 0, request, "Invalid NT-Password");
+ nt_password = NULL;
+ }
+ } else if (!password) {
+ if (!do_ntlm_auth) RDEBUG2("No Cleartext-Password configured. Cannot create NT-Password.");
+
+ } else { /* there is a configured Cleartext-Password */
+ nt_password = radius_pairmake(request, &request->config_items,
+ "NT-Password", "", T_OP_EQ);
+ if (!nt_password) {
+ radlog_request(L_ERR, 0, request, "No memory");
+ return RLM_MODULE_FAIL;
+ } else {
+ mschap_ntpwdhash(nt_password->vp_octets,
+ password->vp_strvalue);
+ nt_password->length = 16;
+ }
+ }
+
+ challenge = pairfind(request->packet->vps,
+ PW_MSCHAP_CHALLENGE,
+ VENDORPEC_MICROSOFT);
+ if (!challenge) {
+ RDEBUG("ERROR: You set 'Auth-Type = MS-CHAP' for a request that does not contain any MS-CHAP attributes!");
+ return RLM_MODULE_REJECT;
}
/*
- * Ensure that we're being passed a plain-text password,
- * and not anything else.
+ * We also require an MS-CHAP-Response.
+ */
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP_RESPONSE,
+ VENDORPEC_MICROSOFT);
+
+ /*
+ * MS-CHAP-Response, means MS-CHAPv1
*/
- if (request->password->attribute != PW_PASSWORD) {
- radlog(L_AUTH, "rlm_mschap: Attribute \"Password\" is required for authentication. Cannot use \"%s\".", request->password->name);
+ if (response) {
+ int offset;
+
+ /*
+ * MS-CHAPv1 challenges are 8 octets.
+ */
+ if (challenge->length < 8) {
+ radlog_request(L_AUTH, 0, request, "MS-CHAP-Challenge has the wrong format.");
+ return RLM_MODULE_INVALID;
+ }
+
+ /*
+ * Responses are 50 octets.
+ */
+ if (response->length < 50) {
+ radlog_request(L_AUTH, 0, request, "MS-CHAP-Response has the wrong format.");
+ return RLM_MODULE_INVALID;
+ }
+
+ /*
+ * We are doing MS-CHAP. Calculate the MS-CHAP
+ * response
+ */
+ if (response->vp_octets[1] & 0x01) {
+ RDEBUG2("Told to do MS-CHAPv1 with NT-Password");
+ password = nt_password;
+ offset = 26;
+ } else {
+ RDEBUG2("Told to do MS-CHAPv1 with LM-Password");
+ password = lm_password;
+ offset = 2;
+ }
+
+ /*
+ * Do the MS-CHAP authentication.
+ */
+ if (do_mschap(inst, request, password, challenge->vp_octets,
+ response->vp_octets + offset, nthashhash,
+ do_ntlm_auth) < 0) {
+ RDEBUG2("MS-CHAP-Response is incorrect.");
+ mschap_add_reply(request, &request->reply->vps,
+ *response->vp_octets,
+ "MS-CHAP-Error", "E=691 R=1", 9);
+ return RLM_MODULE_REJECT;
+ }
+
+ chap = 1;
+
+ } else if ((response = pairfind(request->packet->vps, PW_MSCHAP2_RESPONSE, VENDORPEC_MICROSOFT)) != NULL) {
+ uint8_t mschapv1_challenge[16];
+ VALUE_PAIR *name_attr, *response_name;
+
+ /*
+ * MS-CHAPv2 challenges are 16 octets.
+ */
+ if (challenge->length < 16) {
+ radlog_request(L_AUTH, 0, request, "MS-CHAP-Challenge has the wrong format.");
+ return RLM_MODULE_INVALID;
+ }
+
+ /*
+ * Responses are 50 octets.
+ */
+ if (response->length < 50) {
+ radlog_request(L_AUTH, 0, request, "MS-CHAP-Response has the wrong format.");
+ return RLM_MODULE_INVALID;
+ }
+
+ /*
+ * We also require a User-Name
+ */
+ username = pairfind(request->packet->vps, PW_USER_NAME, 0);
+ if (!username) {
+ radlog_request(L_AUTH, 0, request, "We require a User-Name for MS-CHAPv2");
+ return RLM_MODULE_INVALID;
+ }
+
+ /*
+ * Check for MS-CHAP-User-Name and if found, use it
+ * to construct the MSCHAPv1 challenge. This is
+ * set by rlm_eap_mschap to the MS-CHAP Response
+ * packet Name field.
+ *
+ * We prefer this to the User-Name in the
+ * packet.
+ */
+ response_name = pairfind(request->packet->vps, PW_MS_CHAP_USER_NAME, 0);
+ if (response_name) {
+ name_attr = response_name;
+ } else {
+ name_attr = username;
+ }
+
+ /*
+ * with_ntdomain_hack moved here, too.
+ */
+ if ((username_string = strchr(name_attr->vp_strvalue, '\\')) != NULL) {
+ if (inst->with_ntdomain_hack) {
+ username_string++;
+ } else {
+ RDEBUG2("NT Domain delimeter found, should we have enabled with_ntdomain_hack?");
+ username_string = name_attr->vp_strvalue;
+ }
+ } else {
+ username_string = name_attr->vp_strvalue;
+ }
+
+ if (response_name &&
+ ((username->length != response_name->length) ||
+ (strncasecmp(username->vp_strvalue, response_name->vp_strvalue, username->length) != 0))) {
+ RDEBUG("ERROR: User-Name (%s) is not the same as MS-CHAP Name (%s) from EAP-MSCHAPv2", username->vp_strvalue, response_name->vp_strvalue);
+ return RLM_MODULE_REJECT;
+ }
+
+#ifdef __APPLE__
+ /*
+ * No "known good" NT-Password attribute. Try to do
+ * OpenDirectory authentication.
+ *
+ * If OD determines the user is an AD user it will return noop, which
+ * indicates the auth process should continue directly to AD.
+ * Otherwise OD will determine auth success/fail.
+ */
+ if (!nt_password && inst->open_directory) {
+ RDEBUG2("No NT-Password configured. Trying OpenDirectory Authentication.");
+ int odStatus = od_mschap_auth(request, challenge, username);
+ if (odStatus != RLM_MODULE_NOOP) {
+ return odStatus;
+ }
+ }
+#endif
+ /*
+ * The old "mschapv2" function has been moved to
+ * here.
+ *
+ * MS-CHAPv2 takes some additional data to create an
+ * MS-CHAPv1 challenge, and then does MS-CHAPv1.
+ */
+ RDEBUG2("Creating challenge hash with username: %s",
+ username_string);
+ mschap_challenge_hash(response->vp_octets + 2, /* peer challenge */
+ challenge->vp_octets, /* our challenge */
+ username_string, /* user name */
+ mschapv1_challenge); /* resulting challenge */
+
+ RDEBUG2("Told to do MS-CHAPv2 for %s with NT-Password",
+ username_string);
+
+ if (do_mschap(inst, request, nt_password, mschapv1_challenge,
+ response->vp_octets + 26, nthashhash,
+ do_ntlm_auth) < 0) {
+ RDEBUG2("FAILED: MS-CHAP2-Response is incorrect");
+ mschap_add_reply(request, &request->reply->vps,
+ *response->vp_octets,
+ "MS-CHAP-Error", "E=691 R=1", 9);
+ return RLM_MODULE_REJECT;
+ }
+
+ mschap_auth_response(username_string, /* without the domain */
+ nthashhash, /* nt-hash-hash */
+ response->vp_octets + 26, /* peer response */
+ response->vp_octets + 2, /* peer challenge */
+ challenge->vp_octets, /* our challenge */
+ msch2resp); /* calculated MPPE key */
+ mschap_add_reply(request, &request->reply->vps, *response->vp_octets,
+ "MS-CHAP2-Success", msch2resp, 42);
+ chap = 2;
+
+ } else { /* Neither CHAPv1 or CHAPv2 response: die */
+ RDEBUG("ERROR: You set 'Auth-Type = MS-CHAP' for a request that does not contain any MS-CHAP attributes!");
return RLM_MODULE_INVALID;
}
-
+
/*
- * Calculate the MS-CHAP response
+ * We have a CHAP response, but the account may be
+ * disabled. Reject the user with the same error code
+ * we use when their password is invalid.
*/
- mschap(challenge->strvalue, request->password->strvalue, calculated);
- if (memcmp(response->strvalue + 26, calculated, 24) == 0) {
- return RLM_MODULE_OK;
+ if (smb_ctrl) {
+ /*
+ * Account is disabled.
+ *
+ * They're found, but they don't exist, so we
+ * return 'not found'.
+ */
+ if (((smb_ctrl->vp_integer & ACB_DISABLED) != 0) ||
+ ((smb_ctrl->vp_integer & ACB_NORMAL) == 0)) {
+ RDEBUG2("SMB-Account-Ctrl says that the account is disabled, or is not a normal account.");
+ mschap_add_reply(request, &request->reply->vps,
+ *response->vp_octets,
+ "MS-CHAP-Error", "E=691 R=1", 9);
+ return RLM_MODULE_NOTFOUND;
+ }
+
+ /*
+ * User is locked out.
+ */
+ if ((smb_ctrl->vp_integer & ACB_AUTOLOCK) != 0) {
+ RDEBUG2("SMB-Account-Ctrl says that the account is locked out.");
+ mschap_add_reply(request, &request->reply->vps,
+ *response->vp_octets,
+ "MS-CHAP-Error", "E=647 R=0", 9);
+ return RLM_MODULE_USERLOCK;
+ }
}
-
- return RLM_MODULE_REJECT;
+
+ /* now create MPPE attributes */
+ if (inst->use_mppe) {
+ uint8_t mppe_sendkey[34];
+ uint8_t mppe_recvkey[34];
+
+ if (chap == 1){
+ RDEBUG2("adding MS-CHAPv1 MPPE keys");
+ memset(mppe_sendkey, 0, 32);
+ if (lm_password) {
+ memcpy(mppe_sendkey, lm_password->vp_octets, 8);
+ }
+
+ /*
+ * According to RFC 2548 we
+ * should send NT hash. But in
+ * practice it doesn't work.
+ * Instead, we should send nthashhash
+ *
+ * This is an error on RFC 2548.
+ */
+ /*
+ * do_mschap cares to zero nthashhash if NT hash
+ * is not available.
+ */
+ memcpy(mppe_sendkey + 8,
+ nthashhash, 16);
+ mppe_add_reply(request,
+ "MS-CHAP-MPPE-Keys",
+ mppe_sendkey, 32);
+ } else if (chap == 2) {
+ RDEBUG2("adding MS-CHAPv2 MPPE keys");
+ mppe_chap2_gen_keys128(nthashhash,
+ response->vp_octets + 26,
+ mppe_sendkey, mppe_recvkey);
+
+ mppe_add_reply(request,
+ "MS-MPPE-Recv-Key",
+ mppe_recvkey, 16);
+ mppe_add_reply(request,
+ "MS-MPPE-Send-Key",
+ mppe_sendkey, 16);
+
+ }
+ radius_pairmake(request, &request->reply->vps,
+ "MS-MPPE-Encryption-Policy",
+ (inst->require_encryption)? "0x00000002":"0x00000001",
+ T_OP_EQ);
+ radius_pairmake(request, &request->reply->vps,
+ "MS-MPPE-Encryption-Types",
+ (inst->require_strong)? "0x00000004":"0x00000006",
+ T_OP_EQ);
+ } /* else we weren't asked to use MPPE */
+
+ return RLM_MODULE_OK;
+#undef inst
}
module_t rlm_mschap = {
- "MS-CHAP",
- 0, /* type */
- NULL, /* initialize */
- NULL, /* instantiation */
- NULL, /* authorize */
- mschap_auth, /* authenticate */
- NULL, /* pre-accounting */
- NULL, /* accounting */
- NULL, /* checksimul */
- NULL, /* detach */
- NULL, /* destroy */
+ RLM_MODULE_INIT,
+ "MS-CHAP",
+ RLM_TYPE_THREAD_SAFE, /* type */
+ mschap_instantiate, /* instantiation */
+ mschap_detach, /* detach */
+ {
+ mschap_authenticate, /* authenticate */
+ mschap_authorize, /* authorize */
+ NULL, /* pre-accounting */
+ NULL, /* accounting */
+ NULL, /* checksimul */
+ NULL, /* pre-proxy */
+ NULL, /* post-proxy */
+ NULL /* post-auth */
+ },
};
projects / freeradius.git / blobdiff