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// SoftEther VPN Source Code
// Cedar Communication Module
//
// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
//
// Copyright (c) 2012-2015 Daiyuu Nobori.
// Copyright (c) 2012-2015 SoftEther VPN Project, University of Tsukuba, Japan.
// Copyright (c) 2012-2015 SoftEther Corporation.
//
// All Rights Reserved.
//
// http://www.softether.org/
//
// Author: Daiyuu Nobori
// Comments: Tetsuo Sugiyama, Ph.D.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// version 2 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 version 2
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
//
//
// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
//
// USE ONLY IN JAPAN. DO NOT USE THIS SOFTWARE IN ANOTHER COUNTRY UNLESS
// YOU HAVE A CONFIRMATION THAT THIS SOFTWARE DOES NOT VIOLATE ANY
// CRIMINAL LAWS OR CIVIL RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS
// SOFTWARE IN OTHER COUNTRIES IS COMPLETELY AT YOUR OWN RISK. THE
// SOFTETHER VPN PROJECT HAS DEVELOPED AND DISTRIBUTED THIS SOFTWARE TO
// COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING CIVIL RIGHTS INCLUDING
// PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER COUNTRIES' LAWS OR
// CIVIL RIGHTS ARE NONE OF OUR CONCERNS NOR RESPONSIBILITIES. WE HAVE
// NEVER INVESTIGATED ANY CRIMINAL REGULATIONS, CIVIL LAWS OR
// INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENTS IN ANY OF OTHER 200+
// COUNTRIES AND TERRITORIES. BY NATURE, THERE ARE 200+ REGIONS IN THE
// WORLD, WITH DIFFERENT LAWS. IT IS IMPOSSIBLE TO VERIFY EVERY
// COUNTRIES' LAWS, REGULATIONS AND CIVIL RIGHTS TO MAKE THE SOFTWARE
// COMPLY WITH ALL COUNTRIES' LAWS BY THE PROJECT. EVEN IF YOU WILL BE
// SUED BY A PRIVATE ENTITY OR BE DAMAGED BY A PUBLIC SERVANT IN YOUR
// COUNTRY, THE DEVELOPERS OF THIS SOFTWARE WILL NEVER BE LIABLE TO
// RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT
// JUST A STATEMENT FOR WARNING AND DISCLAIMER.
//
//
// SOURCE CODE CONTRIBUTION
// ------------------------
//
// Your contribution to SoftEther VPN Project is much appreciated.
// Please send patches to us through GitHub.
// Read the SoftEther VPN Patch Acceptance Policy in advance:
// http://www.softether.org/5-download/src/9.patch
//
//
// DEAR SECURITY EXPERTS
// ---------------------
//
// If you find a bug or a security vulnerability please kindly inform us
// about the problem immediately so that we can fix the security problem
// to protect a lot of users around the world as soon as possible.
//
// Our e-mail address for security reports is:
// softether-vpn-security [at] softether.org
//
// Please note that the above e-mail address is not a technical support
// inquiry address. If you need technical assistance, please visit
// http://www.softether.org/ and ask your question on the users forum.
//
// Thank you for your cooperation.
//
//
// NO MEMORY OR RESOURCE LEAKS
// ---------------------------
//
// The memory-leaks and resource-leaks verification under the stress
// test has been passed before release this source code.
// Sam.c
// Security Accounts Manager
#include "CedarPch.h"
// Password encryption
void SecurePassword(void *secure_password, void *password, void *random)
{
BUF *b;
// Validate arguments
if (secure_password == NULL || password == NULL || random == NULL)
{
return;
}
b = NewBuf();
WriteBuf(b, password, SHA1_SIZE);
WriteBuf(b, random, SHA1_SIZE);
Hash(secure_password, b->Buf, b->Size, true);
FreeBuf(b);
}
// Generate 160bit random number
void GenRamdom(void *random)
{
// Validate arguments
if (random == NULL)
{
return;
}
Rand(random, SHA1_SIZE);
}
// Anonymous authentication of user
bool SamAuthUserByAnonymous(HUB *h, char *username)
{
bool b = false;
// Validate arguments
if (h == NULL || username == NULL)
{
return false;
}
AcLock(h);
{
USER *u = AcGetUser(h, username);
if (u)
{
Lock(u->lock);
{
if (u->AuthType == AUTHTYPE_ANONYMOUS)
{
b = true;
}
}
Unlock(u->lock);
}
ReleaseUser(u);
}
AcUnlock(h);
return b;
}
// Plaintext password authentication of user
bool SamAuthUserByPlainPassword(CONNECTION *c, HUB *hub, char *username, char *password, bool ast, UCHAR *mschap_v2_server_response_20, RADIUS_LOGIN_OPTION *opt)
{
bool b = false;
wchar_t *name = NULL;
bool auth_by_nt = false;
HUB *h;
// Validate arguments
if (hub == NULL || c == NULL || username == NULL)
{
return false;
}
if (GetGlobalServerFlag(GSF_DISABLE_RADIUS_AUTH) != 0)
{
return false;
}
h = hub;
AddRef(h->ref);
// Get the user name on authentication system
AcLock(hub);
{
USER *u;
u = AcGetUser(hub, ast == false ? username : "*");
if (u)
{
Lock(u->lock);
{
if (u->AuthType == AUTHTYPE_RADIUS)
{
// Radius authentication
AUTHRADIUS *auth = (AUTHRADIUS *)u->AuthData;
if (ast || auth->RadiusUsername == NULL || UniStrLen(auth->RadiusUsername) == 0)
{
name = CopyStrToUni(username);
}
else
{
name = CopyUniStr(auth->RadiusUsername);
}
auth_by_nt = false;
}
else if (u->AuthType == AUTHTYPE_NT)
{
// NT authentication
AUTHNT *auth = (AUTHNT *)u->AuthData;
if (ast || auth->NtUsername == NULL || UniStrLen(auth->NtUsername) == 0)
{
name = CopyStrToUni(username);
}
else
{
name = CopyUniStr(auth->NtUsername);
}
auth_by_nt = true;
}
}
Unlock(u->lock);
ReleaseUser(u);
}
}
AcUnlock(hub);
if (name != NULL)
{
if (auth_by_nt == false)
{
// Radius authentication
char radius_server_addr[MAX_SIZE];
UINT radius_server_port;
char radius_secret[MAX_SIZE];
char suffix_filter[MAX_SIZE];
wchar_t suffix_filter_w[MAX_SIZE];
UINT interval;
Zero(suffix_filter, sizeof(suffix_filter));
Zero(suffix_filter_w, sizeof(suffix_filter_w));
// Get the Radius server information
if (GetRadiusServerEx2(hub, radius_server_addr, sizeof(radius_server_addr), &radius_server_port, radius_secret, sizeof(radius_secret), &interval, suffix_filter, sizeof(suffix_filter)))
{
Unlock(hub->lock);
StrToUni(suffix_filter_w, sizeof(suffix_filter_w), suffix_filter);
if (UniIsEmptyStr(suffix_filter_w) || UniEndWith(name, suffix_filter_w))
{
// Attempt to login
b = RadiusLogin(c, radius_server_addr, radius_server_port,
radius_secret, StrLen(radius_secret),
name, password, interval, mschap_v2_server_response_20, opt);
if (b)
{
if (opt != NULL)
{
opt->Out_IsRadiusLogin = true;
}
}
}
Lock(hub->lock);
}
else
{
HLog(hub, "LH_NO_RADIUS_SETTING", name);
}
}
else
{
// NT authentication (Not available for non-Win32)
#ifdef OS_WIN32
IPC_MSCHAP_V2_AUTHINFO mschap;
Unlock(hub->lock);
if (ParseAndExtractMsChapV2InfoFromPassword(&mschap, password) == false)
{
// Plaintext password authentication
b = MsCheckLogon(name, password);
}
else
{
UCHAR challenge8[8];
UCHAR nt_pw_hash_hash[16];
char nt_name[MAX_SIZE];
UniToStr(nt_name, sizeof(nt_name), name);
// MS-CHAPv2 authentication
MsChapV2_GenerateChallenge8(challenge8, mschap.MsChapV2_ClientChallenge,
mschap.MsChapV2_ServerChallenge,
mschap.MsChapV2_PPPUsername);
Debug("MsChapV2_PPPUsername = %s, nt_name = %s\n", mschap.MsChapV2_PPPUsername, nt_name);
b = MsPerformMsChapV2AuthByLsa(nt_name, challenge8, mschap.MsChapV2_ClientResponse, nt_pw_hash_hash);
if (b)
{
if (mschap_v2_server_response_20 != NULL)
{
MsChapV2Server_GenerateResponse(mschap_v2_server_response_20, nt_pw_hash_hash,
mschap.MsChapV2_ClientResponse, challenge8);
}
}
}
Lock(hub->lock);
#else // OS_WIN32
// Nothing to do other than Win32
#endif // OS_WIN32
}
// Memory release
Free(name);
}
ReleaseHub(h);
return b;
}
// Certificate authentication of user
bool SamAuthUserByCert(HUB *h, char *username, X *x)
{
bool b = false;
// Validate arguments
if (h == NULL || username == NULL || x == NULL)
{
return false;
}
if (GetGlobalServerFlag(GSF_DISABLE_CERT_AUTH) != 0)
{
return false;
}
// Check expiration date
if (CheckXDateNow(x) == false)
{
return false;
}
// Check the Certification Revocation List
if (IsValidCertInHub(h, x) == false)
{
// Bad
wchar_t tmp[MAX_SIZE * 2];
// Log the contents of the certificate
GetAllNameFromX(tmp, sizeof(tmp), x);
HLog(h, "LH_AUTH_NG_CERT", username, tmp);
return false;
}
AcLock(h);
{
USER *u;
u = AcGetUser(h, username);
if (u)
{
Lock(u->lock);
{
if (u->AuthType == AUTHTYPE_USERCERT)
{
// Check whether to matche with the registered certificate
AUTHUSERCERT *auth = (AUTHUSERCERT *)u->AuthData;
if (CompareX(auth->UserX, x))
{
b = true;
}
}
else if (u->AuthType == AUTHTYPE_ROOTCERT)
{
// Check whether the certificate has been signed by the root certificate
AUTHROOTCERT *auth = (AUTHROOTCERT *)u->AuthData;
if (h->HubDb != NULL)
{
LockList(h->HubDb->RootCertList);
{
X *root_cert;
root_cert = GetIssuerFromList(h->HubDb->RootCertList, x);
if (root_cert != NULL)
{
b = true;
if (auth->CommonName != NULL && UniIsEmptyStr(auth->CommonName) == false)
{
// Compare the CN
if (UniStrCmpi(x->subject_name->CommonName, auth->CommonName) != 0)
{
b = false;
}
}
if (auth->Serial != NULL && auth->Serial->size >= 1)
{
// Compare the serial number
if (CompareXSerial(x->serial, auth->Serial) == false)
{
b = false;
}
}
}
}
UnlockList(h->HubDb->RootCertList);
}
}
}
Unlock(u->lock);
ReleaseUser(u);
}
}
AcUnlock(h);
if (b)
{
wchar_t tmp[MAX_SIZE * 2];
// Log the contents of the certificate
GetAllNameFromX(tmp, sizeof(tmp), x);
HLog(h, "LH_AUTH_OK_CERT", username, tmp);
}
return b;
}
// Get the root certificate that signed the specified certificate from the list
X *GetIssuerFromList(LIST *cert_list, X *cert)
{
UINT i;
X *ret = NULL;
// Validate arguments
if (cert_list == NULL || cert == NULL)
{
return NULL;
}
for (i = 0;i < LIST_NUM(cert_list);i++)
{
X *x = LIST_DATA(cert_list, i);
// Name comparison
if (CheckXDateNow(x))
{
if (CompareName(x->subject_name, cert->issuer_name))
{
// Get the public key of the root certificate
K *k = GetKFromX(x);
if (k != NULL)
{
// Check the signature
if (CheckSignature(cert, k))
{
ret = x;
}
FreeK(k);
}
}
}
if (CompareX(x, cert))
{
// Complete identical
ret = x;
}
}
return ret;
}
// Get the policy to be applied for the user
POLICY *SamGetUserPolicy(HUB *h, char *username)
{
POLICY *ret = NULL;
// Validate arguments
if (h == NULL || username == NULL)
{
return NULL;
}
AcLock(h);
{
USER *u;
u = AcGetUser(h, username);
if (u)
{
USERGROUP *g = NULL;
Lock(u->lock);
{
if (u->Policy != NULL)
{
ret = ClonePolicy(u->Policy);
}
g = u->Group;
if (g != NULL)
{
AddRef(g->ref);
}
}
Unlock(u->lock);
ReleaseUser(u);
u = NULL;
if (ret == NULL)
{
if (g != NULL)
{
Lock(g->lock);
{
ret = ClonePolicy(g->Policy);
}
Unlock(g->lock);
}
}
if (g != NULL)
{
ReleaseGroup(g);
}
}
}
AcUnlock(h);
return ret;
}
// Password authentication of user
bool SamAuthUserByPassword(HUB *h, char *username, void *random, void *secure_password, char *mschap_v2_password, UCHAR *mschap_v2_server_response_20, UINT *err)
{
bool b = false;
UCHAR secure_password_check[SHA1_SIZE];
bool is_mschap = false;
IPC_MSCHAP_V2_AUTHINFO mschap;
UINT dummy = 0;
// Validate arguments
if (h == NULL || username == NULL || secure_password == NULL)
{
return false;
}
if (err == NULL)
{
err = &dummy;
}
*err = 0;
Zero(&mschap, sizeof(mschap));
is_mschap = ParseAndExtractMsChapV2InfoFromPassword(&mschap, mschap_v2_password);
if (StrCmpi(username, ADMINISTRATOR_USERNAME) == 0)
{
// Administrator mode
SecurePassword(secure_password_check, h->SecurePassword, random);
if (Cmp(secure_password_check, secure_password, SHA1_SIZE) == 0)
{
return true;
}
else
{
return false;
}
}
AcLock(h);
{
USER *u;
u = AcGetUser(h, username);
if (u)
{
Lock(u->lock);
{
if (u->AuthType == AUTHTYPE_PASSWORD)
{
AUTHPASSWORD *auth = (AUTHPASSWORD *)u->AuthData;
if (is_mschap == false)
{
// Normal password authentication
SecurePassword(secure_password_check, auth->HashedKey, random);
if (Cmp(secure_password_check, secure_password, SHA1_SIZE) == 0)
{
b = true;
}
}
else
{
// MS-CHAP v2 authentication via PPP
UCHAR challenge8[8];
UCHAR client_response[24];
if (IsZero(auth->NtLmSecureHash, MD5_SIZE))
{
// NTLM hash is not registered in the user account
*err = ERR_MSCHAP2_PASSWORD_NEED_RESET;
}
else
{
UCHAR nt_pw_hash_hash[16];
Zero(challenge8, sizeof(challenge8));
Zero(client_response, sizeof(client_response));
MsChapV2_GenerateChallenge8(challenge8, mschap.MsChapV2_ClientChallenge, mschap.MsChapV2_ServerChallenge,
mschap.MsChapV2_PPPUsername);
MsChapV2Client_GenerateResponse(client_response, challenge8, auth->NtLmSecureHash);
if (Cmp(client_response, mschap.MsChapV2_ClientResponse, 24) == 0)
{
// Hash matched
b = true;
// Calculate the response
GenerateNtPasswordHashHash(nt_pw_hash_hash, auth->NtLmSecureHash);
MsChapV2Server_GenerateResponse(mschap_v2_server_response_20, nt_pw_hash_hash,
client_response, challenge8);
}
}
}
}
}
Unlock(u->lock);
ReleaseUser(u);
}
}
AcUnlock(h);
return b;
}
// Make sure that the user exists
bool SamIsUser(HUB *h, char *username)
{
bool b;
// Validate arguments
if (h == NULL || username == NULL)
{
return false;
}
AcLock(h);
{
b = AcIsUser(h, username);
}
AcUnlock(h);
return b;
}
// Get the type of authentication used by the user
UINT SamGetUserAuthType(HUB *h, char *username)
{
UINT authtype;
// Validate arguments
if (h == NULL || username == NULL)
{
return INFINITE;
}
AcLock(h);
{
USER *u = AcGetUser(h, username);
if (u == NULL)
{
authtype = INFINITE;
}
else
{
authtype = u->AuthType;
ReleaseUser(u);
}
}
AcUnlock(h);
return authtype;
}
// Developed by SoftEther VPN Project at University of Tsukuba in Japan.
// Department of Computer Science has dozens of overly-enthusiastic geeks.
// Join us: http://www.tsukuba.ac.jp/english/admission/
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