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/*
CVSNT Generic API
Copyright (C) 2004 Tony Hoyle and March-Hare Software Ltd
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Win32 specific */
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <tchar.h>
#define SECURITY_WIN32
#include <security.h>
#include <lm.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include "../lib/api_system.h"
#include "../cvs_string.h"
#include "../SSPIHandler.h"
CSSPIHandler::CSSPIHandler()
{
m_secPackInfo = NULL;
}
CSSPIHandler::~CSSPIHandler()
{
}
bool CSSPIHandler::init(const char *protocol /* = NULL */)
{
HKEY hk;
if(!protocol)
{
if(!InitProtocol("Negotiate") && !InitProtocol("NTLM"))
return false;
}
else
{
if(!InitProtocol(protocol))
return false;
}
/* Check for BFS mode */
m_broken_file_sharing = false;
if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE,L"SYSTEM\\CurrentControlSet\\Control\\Lsa",0,KEY_QUERY_VALUE,&hk))
{
DWORD dwType,dwVal,dwLen=sizeof(DWORD);
if(!RegQueryValueEx(hk,L"ForceGuest",NULL,&dwType,(LPBYTE)&dwVal,&dwLen))
{
if(dwVal)
m_broken_file_sharing = true;
}
CloseHandle(hk);
}
return true;
}
bool CSSPIHandler::InitProtocol(const char *protocol)
{
if(QuerySecurityPackageInfoA( (char*)protocol, &m_secPackInfo ) != SEC_E_OK)
return false;
if(!m_secPackInfo)
return false;
m_currentProtocol = protocol;
return true;
}
bool CSSPIHandler::ClientStart(bool encrypt, bool& more, const char *name, const char *pwd, const char *tokenSource /* = NULL */)
{
char username[256];
char domain[256];
SECURITY_STATUS rc;
TimeStamp useBefore;
memset(&m_nameAndPwd,0,sizeof(m_nameAndPwd));
if (name && *name)
{
strncpy(username,name,sizeof(username));
char *p = strpbrk(username,"\\/");
if(!p)
domain[0]='\0';
else
{
*p='\0';
strcpy(domain,username);
strcpy(username,p+1);
}
m_nameAndPwd.Domain = (BYTE*)domain;
m_nameAndPwd.DomainLength = (DWORD)strlen(domain);
m_nameAndPwd.User = (BYTE*)username;
m_nameAndPwd.UserLength = (DWORD)strlen(username);
m_nameAndPwd.Password = (BYTE*)(pwd?pwd:"");
m_nameAndPwd.PasswordLength = (DWORD)(pwd?strlen(pwd):0);
m_nameAndPwd.Flags = SEC_WINNT_AUTH_IDENTITY_ANSI;
}
else if(m_broken_file_sharing)
{
m_nameAndPwd.UserLength = sizeof(username);
GetUserNameA(username,&m_nameAndPwd.UserLength);
m_nameAndPwd.User= (BYTE*)username;
m_nameAndPwd.Flags = SEC_WINNT_AUTH_IDENTITY_ANSI;
}
rc = AcquireCredentialsHandleA( NULL, (char*)m_currentProtocol.c_str(), SECPKG_CRED_OUTBOUND, NULL, m_nameAndPwd.UserLength?&m_nameAndPwd:NULL, NULL, NULL, &m_credHandle, &useBefore );
if(rc)
{
m_rc = rc;
return false;
}
m_haveContext = false;
m_tokenSource = tokenSource;
m_ctxReq = ISC_REQ_MUTUAL_AUTH | ISC_REQ_DELEGATE | ISC_REQ_STREAM | ISC_REQ_EXTENDED_ERROR;
if(encrypt)
m_ctxReq |= ISC_REQ_REPLAY_DETECT | ISC_REQ_SEQUENCE_DETECT | ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY;
return ClientStep(more,NULL,0);
}
bool CSSPIHandler::ClientStep(bool& more, const char *inputBuffer, size_t inputSize)
{
SECURITY_STATUS rcISC;
DWORD ctxAttr;
// input and output buffers
TimeStamp useBefore;
SecBufferDesc obd,ibd;
SecBuffer ob[1], ib[2];
m_outputBuffer.resize(m_secPackInfo->cbMaxToken);
obd.ulVersion = SECBUFFER_VERSION;
obd.cBuffers = 1;
obd.pBuffers = ob; // just one buffer
ob[0].cbBuffer = m_secPackInfo->cbMaxToken;
ob[0].pvBuffer = (void*)m_outputBuffer.data();
ob[0].BufferType = SECBUFFER_TOKEN; // preping a token here
if(inputBuffer)
{
// prepare to get the server's response
ibd.ulVersion = SECBUFFER_VERSION;
ibd.cBuffers = 1;
ibd.pBuffers = ib; // just one buffer
ib[0].cbBuffer=(DWORD)inputSize;
ib[0].pvBuffer =(void*)inputBuffer;
ib[0].BufferType = SECBUFFER_TOKEN; // preping a token here
}
rcISC = InitializeSecurityContextA( &m_credHandle, m_haveContext? &m_contextHandle:NULL,
(char*)m_tokenSource, m_ctxReq, 0, SECURITY_NATIVE_DREP, m_haveContext?&ibd:NULL,
0, &m_contextHandle, &obd, &ctxAttr, &useBefore );
if ( rcISC == SEC_I_COMPLETE_AND_CONTINUE || rcISC == SEC_I_COMPLETE_NEEDED )
{
CompleteAuthToken( &m_contextHandle, &obd );
if ( rcISC == SEC_I_COMPLETE_NEEDED )
rcISC = SEC_E_OK;
else if ( rcISC == SEC_I_COMPLETE_AND_CONTINUE )
rcISC = SEC_I_CONTINUE_NEEDED;
}
if(rcISC<0)
{
m_rc = rcISC;
more=false;
return false;
}
m_outputBuffer.resize(ob[0].cbBuffer);
if ( rcISC != SEC_I_CONTINUE_NEEDED )
{
m_rc = rcISC;
if ( rcISC != SEC_E_OK )
m_haveContext = false;
else
{
QueryContextAttributes(&m_contextHandle,SECPKG_ATTR_SIZES,&m_secSizes);
m_haveContext = true;
}
more=false;
return m_haveContext;
}
m_haveContext = true;
more=true;
return true;
}
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