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Diffstat (limited to 'src/Cedar/Sam.c')
-rw-r--r-- | src/Cedar/Sam.c | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/src/Cedar/Sam.c b/src/Cedar/Sam.c new file mode 100644 index 00000000..ac0a0ae2 --- /dev/null +++ b/src/Cedar/Sam.c @@ -0,0 +1,415 @@ +// SoftEther VPN Source Code
+// Cedar Communication Module
+//
+// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
+//
+// Copyright (c) 2012-2014 Daiyuu Nobori.
+// Copyright (c) 2012-2014 SoftEther VPN Project, University of Tsukuba, Japan.
+// Copyright (c) 2012-2014 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 IT IN OTHER COUNTRIES. IMPORTING THIS
+// SOFTWARE INTO OTHER COUNTRIES IS AT YOUR OWN RISK. SOME COUNTRIES
+// PROHIBIT ENCRYPTED COMMUNICATIONS. USING THIS SOFTWARE IN OTHER
+// COUNTRIES MIGHT BE RESTRICTED.
+//
+//
+// 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.
+
+
+// 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)
+{
+ return false;
+}
+
+// Certificate authentication of user
+bool SamAuthUserByCert(HUB *h, char *username, X *x)
+{
+ return false;
+}
+
+// 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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