* Copyright 2000,2001,2006 The FreeRADIUS server project
*/
-
-/*
- * mschap.c MS-CHAP module
- *
- * This implements MS-CHAP, as described in RFC 2548
- *
- * http://www.freeradius.org/rfc/rfc2548.txt
- *
- */
-
-/*
- * If you have any questions on NTLM (Samba) passwords
- * support, LM authentication and MS-CHAP v2 support
- * please contact
- *
- * Vladimir Dubrovin vlad@sandy.ru
- * aka
- * ZARAZA 3APA3A@security.nnov.ru
- */
-
/* MPPE support from Takahiro Wagatsuma <waga@sic.shibaura-it.ac.jp> */
#include <freeradius-devel/ident.h>
#include <ctype.h>
+#include "mschap.h"
#include "smbdes.h"
#ifdef __APPLE__
}
-/*
- * ntpwdhash converts Unicode password to 16-byte NT hash
- * with MD4
- */
-static void ntpwdhash (uint8_t *szHash, const char *szPassword)
-{
- char szUnicodePass[513];
- int nPasswordLen;
- int i;
-
- /*
- * NT 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[i << 1] = szPassword[i];
- szUnicodePass[(i << 1) + 1] = 0;
- }
-
- /* Encrypt Unicode password to a 16-byte MD4 hash */
- fr_md4_calc(szHash, (uint8_t *) szUnicodePass, (nPasswordLen<<1) );
-}
-
-
-/*
- * challenge_hash() is used by mschap2() and auth_response()
- * implements RFC2759 ChallengeHash()
- * generates 64 bit challenge
- */
-static void challenge_hash( const uint8_t *peer_challenge,
- const uint8_t *auth_challenge,
- const char *user_name, uint8_t *challenge )
-{
- fr_SHA1_CTX Context;
- uint8_t hash[20];
-
- fr_SHA1Init(&Context);
- fr_SHA1Update(&Context, peer_challenge, 16);
- fr_SHA1Update(&Context, auth_challenge, 16);
- fr_SHA1Update(&Context, (const uint8_t *) user_name,
- strlen(user_name));
- fr_SHA1Final(hash, &Context);
- memcpy(challenge, hash, 8);
-}
-
-/*
- * auth_response() generates MS-CHAP v2 SUCCESS response
- * according to RFC 2759 GenerateAuthenticatorResponse()
- * returns 42-octet response string
- */
-static void auth_response(const char *username,
- const uint8_t *nt_hash_hash,
- uint8_t *ntresponse,
- uint8_t *peer_challenge, uint8_t *auth_challenge,
- char *response)
-{
- fr_SHA1_CTX Context;
- static const uint8_t magic1[39] =
- {0x4D, 0x61, 0x67, 0x69, 0x63, 0x20, 0x73, 0x65, 0x72, 0x76,
- 0x65, 0x72, 0x20, 0x74, 0x6F, 0x20, 0x63, 0x6C, 0x69, 0x65,
- 0x6E, 0x74, 0x20, 0x73, 0x69, 0x67, 0x6E, 0x69, 0x6E, 0x67,
- 0x20, 0x63, 0x6F, 0x6E, 0x73, 0x74, 0x61, 0x6E, 0x74};
-
- static const uint8_t magic2[41] =
- {0x50, 0x61, 0x64, 0x20, 0x74, 0x6F, 0x20, 0x6D, 0x61, 0x6B,
- 0x65, 0x20, 0x69, 0x74, 0x20, 0x64, 0x6F, 0x20, 0x6D, 0x6F,
- 0x72, 0x65, 0x20, 0x74, 0x68, 0x61, 0x6E, 0x20, 0x6F, 0x6E,
- 0x65, 0x20, 0x69, 0x74, 0x65, 0x72, 0x61, 0x74, 0x69, 0x6F,
- 0x6E};
-
- static const char hex[16] = "0123456789ABCDEF";
-
- size_t i;
- uint8_t challenge[8];
- uint8_t digest[20];
-
- fr_SHA1Init(&Context);
- fr_SHA1Update(&Context, nt_hash_hash, 16);
- fr_SHA1Update(&Context, ntresponse, 24);
- fr_SHA1Update(&Context, magic1, 39);
- fr_SHA1Final(digest, &Context);
- challenge_hash(peer_challenge, auth_challenge, username, challenge);
- fr_SHA1Init(&Context);
- fr_SHA1Update(&Context, digest, 20);
- fr_SHA1Update(&Context, challenge, 8);
- fr_SHA1Update(&Context, magic2, 41);
- fr_SHA1Final(digest, &Context);
-
- /*
- * Encode the value of 'Digest' as "S=" followed by
- * 40 ASCII hexadecimal digits and return it in
- * AuthenticatorResponse.
- * For example,
- * "S=0123456789ABCDEF0123456789ABCDEF01234567"
- */
- response[0] = 'S';
- response[1] = '=';
-
- /*
- * The hexadecimal digits [A-F] MUST be uppercase.
- */
- for (i = 0; i < sizeof(digest); i++) {
- response[2 + (i * 2)] = hex[(digest[i] >> 4) & 0x0f];
- response[3 + (i * 2)] = hex[digest[i] & 0x0f];
- }
-}
-
-
typedef struct rlm_mschap_t {
int use_mppe;
int require_encryption;
*/
if (strncasecmp(fmt, "Challenge", 9) == 0) {
chap_challenge = pairfind(request->packet->vps,
- PW_MSCHAP_CHALLENGE);
+ PW_MSCHAP_CHALLENGE,
+ VENDORPEC_MICROSOFT);
if (!chap_challenge) {
RDEBUG2("No MS-CHAP-Challenge in the request.");
return 0;
* 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);
+ 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) {
}
user_name = pairfind(request->packet->vps,
- PW_USER_NAME);
+ PW_USER_NAME, 0);
if (!user_name) {
- RDEBUG2("User-Name is required to calculateMS-CHAPv1 Challenge.");
+ 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(user_name->vp_strvalue, '\\')) != NULL) {
+ 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 = user_name->vp_strvalue;
+ username_string = name_attr->vp_strvalue;
}
} else {
- username_string = user_name->vp_strvalue;
+ 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);
}
/*
* from the MS-CHAPv2 peer challenge,
* our challenge, and the user name.
*/
- challenge_hash(response->vp_octets + 2,
+ 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;
*/
} else if (strncasecmp(fmt, "NT-Response", 11) == 0) {
response = pairfind(request->packet->vps,
- PW_MSCHAP_RESPONSE);
+ PW_MSCHAP_RESPONSE, VENDORPEC_MICROSOFT);
if (!response) response = pairfind(request->packet->vps,
- PW_MSCHAP2_RESPONSE);
+ PW_MSCHAP2_RESPONSE,
+ VENDORPEC_MICROSOFT);
if (!response) {
RDEBUG2("No MS-CHAP-Response or MS-CHAP2-Response was found in the request.");
return 0;
*/
} else if (strncasecmp(fmt, "LM-Response", 11) == 0) {
response = pairfind(request->packet->vps,
- PW_MSCHAP_RESPONSE);
+ PW_MSCHAP_RESPONSE, VENDORPEC_MICROSOFT);
if (!response) {
RDEBUG2("No MS-CHAP-Response was found in the request.");
return 0;
} else if (strncasecmp(fmt, "NT-Domain", 9) == 0) {
char *p, *q;
- user_name = pairfind(request->packet->vps, PW_USER_NAME);
+ user_name = pairfind(request->packet->vps, PW_USER_NAME, 0);
if (!user_name) {
RDEBUG2("No User-Name was found in the request.");
return 0;
} else if (strncasecmp(fmt, "User-Name", 9) == 0) {
char *p;
- user_name = pairfind(request->packet->vps, PW_USER_NAME);
+ user_name = pairfind(request->packet->vps, PW_USER_NAME, 0);
if (!user_name) {
RDEBUG2("No User-Name was found in the request.");
return 0;
*/
} else if (strncasecmp(fmt, "NT-Hash ", 8) == 0) {
char *p;
+ char buf2[1024];
p = fmt + 8; /* 7 is the length of 'NT-Hash' */
if ((p == '\0') || (outlen <= 32))
return 0;
- RDEBUG("rlm_mschap: NT-Hash: %s",p);
- ntpwdhash(buffer,p);
+
+ 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("rlm_mschap: NT-Hash: Result: %s",out);
+ RDEBUG("NT-Hash of %s = %s", buf2, out);
return 32;
/*
*/
} 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;
- RDEBUG("rlm_mschap: LM-Hash: %s",p);
- smbdes_lmpwdhash(p, buffer);
+ 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("rlm_mschap: LM-Hash: Result: %s",out);
+ RDEBUG("LM-Hash of %s = %s", buf2, out);
return 32;
} else {
RDEBUG2("Unknown expansion string \"%s\"",
/*
* For backwards compatibility
*/
- if (!dict_valbyname(PW_AUTH_TYPE, inst->xlat_name)) {
+ if (!dict_valbyname(PW_AUTH_TYPE, 0, inst->xlat_name)) {
inst->auth_type = "MS-CHAP";
} else {
inst->auth_type = inst->xlat_name;
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->request->vps, vp);
return -1;
}
#define inst ((rlm_mschap_t *)instance)
VALUE_PAIR *challenge = NULL, *response = NULL;
- challenge = pairfind(request->packet->vps, PW_MSCHAP_CHALLENGE);
+ challenge = pairfind(request->packet->vps,
+ PW_MSCHAP_CHALLENGE,
+ VENDORPEC_MICROSOFT);
if (!challenge) {
return RLM_MODULE_NOOP;
}
- response = pairfind(request->packet->vps, PW_MSCHAP_RESPONSE);
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP_RESPONSE,
+ VENDORPEC_MICROSOFT);
if (!response)
- response = pairfind(request->packet->vps, PW_MSCHAP2_RESPONSE);
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP2_RESPONSE,
+ VENDORPEC_MICROSOFT);
/*
* Nothing we recognize. Don't do anything.
return RLM_MODULE_NOOP;
}
- if (pairfind(request->config_items, PW_AUTH_TYPE)) {
- RDEBUG2("Found existing Auth-Type. Not changing it.");
+ if (pairfind(request->config_items, PW_AUTH_TYPE, 0)) {
+ RDEBUG2("WARNING: Auth-Type already set. Not setting to MS-CHAP");
return RLM_MODULE_NOOP;
}
* If we have ntlm_auth configured, use it unless told
* otherwise
*/
- do_ntlm_auth = inst->ntlm_auth;
+ do_ntlm_auth = (inst->ntlm_auth != NULL);
/*
* If we have an ntlm_auth configuration, then we may
*/
if (do_ntlm_auth) {
VALUE_PAIR *vp = pairfind(request->config_items,
- PW_MS_CHAP_USE_NTLM_AUTH);
+ 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);
+ smb_ctrl = pairfind(request->config_items, PW_SMB_ACCOUNT_CTRL, 0);
if (!smb_ctrl) {
password = pairfind(request->config_items,
- PW_SMB_ACCOUNT_CTRL_TEXT);
+ PW_SMB_ACCOUNT_CTRL_TEXT, 0);
if (password) {
smb_ctrl = radius_pairmake(request,
&request->config_items,
/*
* Decide how to get the passwords.
*/
- password = pairfind(request->config_items, PW_CLEARTEXT_PASSWORD);
+ password = pairfind(request->config_items, PW_CLEARTEXT_PASSWORD, 0);
/*
* We need an LM-Password.
*/
- lm_password = pairfind(request->config_items, PW_LM_PASSWORD);
+ lm_password = pairfind(request->config_items, PW_LM_PASSWORD, 0);
if (lm_password) {
/*
* Allow raw octets.
/*
* We need an NT-Password.
*/
- nt_password = pairfind(request->config_items, PW_NT_PASSWORD);
+ nt_password = pairfind(request->config_items, PW_NT_PASSWORD, 0);
if (nt_password) {
if ((nt_password->length == 16) ||
((nt_password->length == 32) &&
radlog_request(L_ERR, 0, request, "No memory");
return RLM_MODULE_FAIL;
} else {
- ntpwdhash(nt_password->vp_octets,
+ mschap_ntpwdhash(nt_password->vp_octets,
password->vp_strvalue);
nt_password->length = 16;
}
}
- challenge = pairfind(request->packet->vps, PW_MSCHAP_CHALLENGE);
+ challenge = pairfind(request->packet->vps,
+ PW_MSCHAP_CHALLENGE,
+ VENDORPEC_MICROSOFT);
if (!challenge) {
- RDEBUG2("No MS-CHAP-Challenge in the request");
+ RDEBUG("ERROR: You set 'Auth-Type = MS-CHAP' for a request that does not contain any MS-CHAP attributes!");
return RLM_MODULE_REJECT;
}
/*
* We also require an MS-CHAP-Response.
*/
- response = pairfind(request->packet->vps, PW_MSCHAP_RESPONSE);
+ response = pairfind(request->packet->vps,
+ PW_MSCHAP_RESPONSE,
+ VENDORPEC_MICROSOFT);
/*
* MS-CHAP-Response, means MS-CHAPv1
chap = 1;
- } else if ((response = pairfind(request->packet->vps, PW_MSCHAP2_RESPONSE)) != NULL) {
+ } 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.
/*
* We also require a User-Name
*/
- username = pairfind(request->packet->vps, PW_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;
}
-
/*
- * with_ntdomain_hack moved here
+ * 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.
*/
- if ((username_string = strchr(username->vp_strvalue, '\\')) != NULL) {
- if (inst->with_ntdomain_hack) {
- username_string++;
+ 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 = username->vp_strvalue;
+ RDEBUG2("NT Domain delimeter found, should we have enabled with_ntdomain_hack?");
+ username_string = name_attr->vp_strvalue;
}
} else {
- username_string = username->vp_strvalue;
+ 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__
* MS-CHAPv2 takes some additional data to create an
* MS-CHAPv1 challenge, and then does MS-CHAPv1.
*/
- challenge_hash(response->vp_octets + 2, /* peer challenge */
+ 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 */
return RLM_MODULE_REJECT;
}
- /*
- * Get the NT-hash-hash, if necessary
- */
- if (nt_password) {
- }
-
- auth_response(username_string, /* without the domain */
+ mschap_auth_response(username_string, /* without the domain */
nthashhash, /* nt-hash-hash */
response->vp_octets + 26, /* peer response */
response->vp_octets + 2, /* peer challenge */
chap = 2;
} else { /* Neither CHAPv1 or CHAPv2 response: die */
- radlog_request(L_AUTH, 0, request, "No MS-CHAP response found");
+ RDEBUG("ERROR: You set 'Auth-Type = MS-CHAP' for a request that does not contain any MS-CHAP attributes!");
return RLM_MODULE_INVALID;
}
projects / freeradius.git / blobdiff