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670 lines
19 KiB
670 lines
19 KiB
/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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iiscert.cxx
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Abstract:
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Code to handle retrieving/storing/using CAPI2 certificate contexts for IIS server
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certificates.
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Author:
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Alex Mallet (amallet) 02-Dec-1997
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--*/
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#include "tcpdllp.hxx"
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#pragma hdrstop
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#include <dbgutil.h>
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#include <buffer.hxx>
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#include <ole2.h>
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#include <imd.h>
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#include <mb.hxx>
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//
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// Local includes
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//
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#include "iiscert.hxx"
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#include "capiutil.hxx"
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#define SHA1_HASH_SIZE 20 //size of SHA1 hash
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HCRYPTPROV IIS_SERVER_CERT::m_hFortezzaCSP = NULL;
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HCRYPTDEFAULTCONTEXT IIS_SERVER_CERT::m_hFortezzaCtxt = NULL;
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IIS_SERVER_CERT::IIS_SERVER_CERT( IN IMDCOM *pMDObject,
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IN LPTSTR pszMBPath ) :
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m_strMBPath( pszMBPath ),
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m_pStoreInfo( NULL ),
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m_hCryptProv( NULL ),
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m_pCertContext( NULL ),
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m_fIsFortezzaCert( FALSE )
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/*++
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Routine Description:
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Constructor for server cert that reads all necessary info out of metabase
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Arguments:
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pMDObject - pointer to metabase object
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pszMBPath - full path in metabase to information for this virtual server instance
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Returns:
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Nothing
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--*/
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{
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DBG_ASSERT( pMDObject );
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DBG_ASSERT( pszMBPath );
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DWORD dwSize = 0;
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METADATA_HANDLE hInstanceInfoHandle = NULL;
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int iLengthNeeded = 0;
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PBYTE pbCertHash = NULL;
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DWORD dwHashSize = 0;
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DWORD dwPathLength = 0;
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MB mb( pMDObject );
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LPTSTR pszCSPString = NULL;
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LPTSTR pszCSPStringCopy = NULL;
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BOOL fProgPINEntry = FALSE;
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m_dwStatus = CERT_ERR_NONE;
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if ( !m_strMBPath.IsValid() )
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{
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SetLastError( ERROR_OUTOFMEMORY );
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goto EndRetrieveCertContext;
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}
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if ( mb.Open( m_strMBPath.QueryStr(),
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METADATA_PERMISSION_READ ))
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{
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DWORD dwReqDataLen = 0;
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METADATA_RECORD mdr;
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DWORD dwFortezza = 0;
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//
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// Retrieve cert hash
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//
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MD_SET_DATA_RECORD(&mdr, MD_SSL_CERT_HASH, METADATA_NO_ATTRIBUTES,
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IIS_MD_UT_SERVER, BINARY_METADATA, NULL,
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0);
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if ( !RetrieveBlobFromMetabase(&mb,
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NULL,
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&mdr,
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SHA1_HASH_SIZE ) )
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{
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m_dwStatus = CERT_ERR_MB;
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goto EndRetrieveCertContext;
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}
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else
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{
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DBG_ASSERT( mdr.dwMDDataLen == SHA1_HASH_SIZE );
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pbCertHash = mdr.pbMDData;
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dwHashSize = mdr.dwMDDataLen;
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}
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//
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// Retrieve flag indicating whether it's a Fortezza cert or not
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//
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if ( !mb.GetDword( NULL,
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MD_SSL_CERT_IS_FORTEZZA,
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IIS_MD_UT_SERVER,
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&(dwFortezza),
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METADATA_NO_ATTRIBUTES ) )
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{
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if ( GetLastError() != MD_ERROR_DATA_NOT_FOUND )
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{
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m_dwStatus = CERT_ERR_MB;
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goto EndRetrieveCertContext;
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}
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else
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{
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m_fIsFortezzaCert = FALSE;
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}
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}
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else
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{
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m_fIsFortezzaCert = (BOOL) dwFortezza;
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}
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//
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// If it's a Fortezza cert and we're supposed to do programmatic PIN entry,
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// we need to get a handle to the CSP ourselves by providing the
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// PIN in the call to CryptAcquireContext(), to avoid the "Enter PIN" dialog
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//
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if ( m_fIsFortezzaCert && ( fProgPINEntry = UseProgrammaticPINEntry( &mb ) ) )
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{
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LPTSTR pszPIN = NULL;
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LPTSTR pszSerialNumber = NULL;
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LPTSTR pszPersonality = NULL;
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DWORD cbPIN = 0;
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DWORD cbSerialNumber = 0;
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DWORD cbPersonality = 0;
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DWORD cbLen = 0;
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DWORD iPos = 0;
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if ( !RetrievePINInfo( &mb,
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&pszPIN,
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&pszSerialNumber,
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&pszPersonality ) )
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{
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DBGPRINTF((DBG_CONTEXT,
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"Couldn't retrieve PIN info for Fortezza card\n"));
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m_dwStatus = CERT_ERR_MB;
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goto EndRetrieveCertContext;
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}
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DBG_ASSERT( pszPIN && pszSerialNumber && pszPersonality );
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//
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// Construct string to be passed to CryptAcquireContext - it's
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// <card serial #>\n<personality>\n<PIN>.
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//
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cbPIN = strlen( pszPIN );
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cbSerialNumber = strlen( pszSerialNumber );
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cbPersonality = strlen( pszPersonality );
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cbLen = cbPIN + cbSerialNumber + cbPersonality + 10; //add a few bytes for CR
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//and null terminating char
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pszCSPString = new CHAR[cbLen];
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pszCSPStringCopy = new CHAR[cbLen];
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if ( !pszCSPString || !pszCSPStringCopy )
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{
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DBGPRINTF((DBG_CONTEXT,
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"Couldn't allocate memory for CSP string\n"));
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//
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// Clean out the PIN info - the less time we leave it lying around,
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// the better
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//
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memset( pszPIN, 0, cbPIN );
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delete [] pszPIN;
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memset( pszSerialNumber, 0, cbSerialNumber );
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delete [] pszSerialNumber;
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memset( pszPersonality, 0, cbPersonality );
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delete [] pszPersonality;
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m_dwStatus = CERT_ERR_INTERNAL;
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goto EndRetrieveCertContext;
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}
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//
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// Build the magic string that will unlock the Fortezza secret ...
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//
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strcpy( pszCSPString, pszSerialNumber );
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strcat( pszCSPString, "\n" );
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strcat( pszCSPString, pszPersonality );
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strcat( pszCSPString, "\n" );
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strcat( pszCSPString, pszPIN );
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//
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// Make a copy we can reuse later
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//
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strcpy( pszCSPStringCopy, pszCSPString );
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//
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// Clean out the PIN & serial number - the less time we leave it lying around,
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// the better
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//
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memset( pszPIN, 0, cbPIN );
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delete [] pszPIN;
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memset( pszSerialNumber, 0, cbSerialNumber );
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delete [] pszSerialNumber;
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memset( pszPersonality, 0, cbPersonality );
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delete [] pszPersonality;
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//
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// Get a handle to the CSP, passing in the serial # etc and the
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// CRYPT_SILENT flag to avoid any UI
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//
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if ( !CryptAcquireContext( &m_hCryptProv,
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pszCSPString,
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NULL,
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PROV_FORTEZZA,
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CRYPT_SILENT | CRYPT_MACHINE_KEYSET ) )
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{
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DBGPRINTF((DBG_CONTEXT,
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"Couldn't get handle to Fortezza CSP : 0x%d\n",
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GetLastError()));
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m_dwStatus = CERT_ERR_CAPI;
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goto EndRetrieveCertContext;
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}
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if ( !IIS_SERVER_CERT::m_hFortezzaCSP )
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{
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//
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// There's apparently no way to duplicate an HCRYPTPROV handle,
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// so we have to call CryptAcquireContext again. Also, rumour
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// has it that the Fortezza CSP nulls out the string passed to it,
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// so we have to use a copy of it
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//
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if ( !CryptAcquireContext( &IIS_SERVER_CERT::m_hFortezzaCSP,
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pszCSPStringCopy,
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NULL,
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PROV_FORTEZZA,
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CRYPT_SILENT | CRYPT_MACHINE_KEYSET ) )
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{
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DBGPRINTF((DBG_CONTEXT,
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"Couldn't get handle to Fortezza CSP : 0x%d\n",
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GetLastError()));
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m_dwStatus = CERT_ERR_CAPI;
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goto EndRetrieveCertContext;
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}
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//
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// Install the handler used to verify Fortezza signatures.
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//
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CRYPT_DEFAULT_CONTEXT_MULTI_OID_PARA CDCMOP;
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LPSTR rgszOID[2];
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CDCMOP.cOID = 2;
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CDCMOP.rgpszOID = rgszOID;
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CDCMOP.rgpszOID[0] = szOID_INFOSEC_mosaicUpdatedSig;
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CDCMOP.rgpszOID[1] = szOID_INFOSEC_mosaicKMandUpdSig;
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if (!CryptInstallDefaultContext( IIS_SERVER_CERT::m_hFortezzaCSP,
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CRYPT_DEFAULT_CONTEXT_MULTI_CERT_SIGN_OID,
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&CDCMOP,
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CRYPT_DEFAULT_CONTEXT_PROCESS_FLAG,
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NULL,
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&IIS_SERVER_CERT::m_hFortezzaCtxt ) )
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{
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DBGPRINTF((DBG_CONTEXT,
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"Failed to install Fortezza context : 0x%d\n",
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GetLastError()));
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m_dwStatus = CERT_ERR_CAPI;
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goto EndRetrieveCertContext;
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}
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}
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}
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}
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mb.Close();
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//
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// Read store name etc out of MB
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//
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m_pStoreInfo = ReadCertStoreInfoFromMB( pMDObject,
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m_strMBPath.QueryStr(),
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FALSE );
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if ( !m_pStoreInfo )
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{
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m_dwStatus = CERT_ERR_MB;
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goto EndRetrieveCertContext;
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}
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//
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// Open store in which to look for the cert
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//
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if ( !(m_pStoreInfo->hCertStore = CertOpenStore( CERT_STORE_PROV_SYSTEM_A,
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0,
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(fProgPINEntry ? m_hCryptProv : NULL ),
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CERT_SYSTEM_STORE_LOCAL_MACHINE,
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m_pStoreInfo->pszStoreName ) ) )
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{
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m_dwStatus = CERT_ERR_CAPI;
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goto EndRetrieveCertContext;
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}
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//
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// Try to find the cert in the store
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//
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CRYPT_HASH_BLOB HashBlob;
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HashBlob.cbData = dwHashSize;
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HashBlob.pbData = pbCertHash;
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m_pCertContext = CertFindCertificateInStore( m_pStoreInfo->hCertStore,
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X509_ASN_ENCODING,
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0,
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CERT_FIND_SHA1_HASH,
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(VOID *) &HashBlob,
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NULL );
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if ( !m_pCertContext )
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{
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m_dwStatus = CERT_ERR_CERT_NOT_FOUND;
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goto EndRetrieveCertContext;
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}
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else
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{
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#if DBG
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CHAR szSubjectName[1024];
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if ( CertGetNameString( m_pCertContext,
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CERT_NAME_SIMPLE_DISPLAY_TYPE,
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0,
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NULL,
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szSubjectName,
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1024 ) )
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{
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DBGPRINTF((DBG_CONTEXT,
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"Retrieved cert for %s \n",
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szSubjectName));
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}
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#endif
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}
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if ( fProgPINEntry )
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{
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//
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// If this is a Fortezza cert, then we should set the
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// CERT_KEY_PROV_HANDLE_PROP_ID property of the context to point to
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// the HCRYPTPROV retrieved by CryptAcquireContext(). Why? Because
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// if we don't set this property, Schannel will try to acquire the
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// provider handle itself, and will NOT set the CRYPT_MACHINE_KEY
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// flag when doing the call to CryptAcquireContext() and thus we
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// will not be able to acquire the credential handle in SSPIFILT.
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//
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// Fortezza rocks
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//
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if ( !CertSetCertificateContextProperty( m_pCertContext,
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CERT_KEY_PROV_HANDLE_PROP_ID,
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CERT_STORE_NO_CRYPT_RELEASE_FLAG,
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(VOID*) m_hCryptProv ) )
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{
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m_dwStatus = CERT_ERR_CAPI;
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goto EndRetrieveCertContext;
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}
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}
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//
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// If we got this far, everything is happy
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//
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m_dwStatus = CERT_ERR_NONE;
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EndRetrieveCertContext:
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//
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// This is where all the cleanup that takes place only if we fail needs to
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// happen
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//
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DBG_ASSERT( m_dwStatus < CERT_ERR_END );
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if ( m_dwStatus != CERT_ERR_NONE )
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{
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DBGPRINTF((DBG_CONTEXT,
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"IIS_SERVER cert constructor, Error occurred : 0x%x\n",
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GetLastError()));
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if ( m_pCertContext != NULL )
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{
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CertFreeCertificateContext( m_pCertContext );
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m_pCertContext = NULL;
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}
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if ( m_pStoreInfo )
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{
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DeallocateCertStoreInfo( m_pStoreInfo );
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m_pStoreInfo = NULL;
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}
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if ( m_hCryptProv != NULL )
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{
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CryptReleaseContext( m_hCryptProv,
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0 );
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m_hCryptProv = NULL;
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}
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}
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//
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// Cleanup we do regardless of success/failure
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//
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//
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// clean out memory holding PIN
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//
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if ( pszCSPString )
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{
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memset( pszCSPString, 0, strlen( pszCSPString ) );
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delete [] pszCSPString;
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}
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if ( pszCSPStringCopy )
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{
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memset( pszCSPStringCopy, 0, strlen( pszCSPStringCopy ) );
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delete [] pszCSPStringCopy;
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}
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mb.Close();
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} //IIS_SERVER_CERT::IIS_SERVER_CERT
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IIS_SERVER_CERT::~IIS_SERVER_CERT()
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/*++
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Routine Description:
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Destructor
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Arguments :
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None
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Returns :
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Nothing
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--*/
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{
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if ( m_pCertContext )
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{
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CertFreeCertificateContext( m_pCertContext );
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m_pCertContext = NULL;
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}
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if ( m_pStoreInfo )
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{
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DeallocateCertStoreInfo( m_pStoreInfo );
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m_pStoreInfo = NULL;
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}
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if ( m_hCryptProv )
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{
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CryptReleaseContext( m_hCryptProv,
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0 );
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m_hCryptProv = NULL;
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}
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} //~IIS_SERVER_CERT::IIS_SERVER_CERT
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BOOL IIS_SERVER_CERT::RetrievePINInfo( IN MB *pMB,
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OUT LPTSTR *ppszPIN,
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OUT LPTSTR *ppszSerialNumber,
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OUT LPTSTR *ppszPersonality )
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/*++
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Routine Description:
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Retrieve PIN information for Fortezza certificates
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Arguments:
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pMB - pointer to MB object, open for reading
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ppszPIN - pointer to pointer to PIN for Fortezza card, updated on success
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ppszSerialNumber - pointer to pointer to card serial number, updated on success
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ppszPersonality - pointer to pointer to Fortezza "personality", updated on sucess
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Returns:
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BOOL indicating success/failure
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--*/
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{
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DBG_ASSERT( pMB &&
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ppszPIN &&
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ppszSerialNumber &&
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ppszPersonality );
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DWORD cbLen = 0;
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BOOL fSuccess = FALSE;
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DWORD dwReqDataLen = 0;
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METADATA_RECORD mdr;
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//
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// Retrieve PIN
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//
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cbLen = 0;
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if ( ( !pMB->GetString( NULL,
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MD_SSL_CERT_FORTEZZA_PIN,
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IIS_MD_UT_SERVER,
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NULL,
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&cbLen,
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METADATA_SECURE ) &&
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GetLastError() != ERROR_INSUFFICIENT_BUFFER ) ||
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!cbLen )
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{
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goto end_pin_info;
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}
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*ppszPIN = new CHAR[cbLen + 1];
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if ( !*ppszPIN ||
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!pMB->GetString( NULL,
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MD_SSL_CERT_FORTEZZA_PIN,
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IIS_MD_UT_SERVER,
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*ppszPIN,
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&cbLen,
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METADATA_SECURE ) )
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{
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goto end_pin_info;
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}
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//
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// Retrieve serial #
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//
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cbLen = 0;
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if ( ( !pMB->GetString( NULL,
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MD_SSL_CERT_FORTEZZA_SERIAL_NUMBER,
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IIS_MD_UT_SERVER,
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NULL,
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&cbLen,
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METADATA_SECURE ) &&
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GetLastError() != ERROR_INSUFFICIENT_BUFFER ) ||
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!cbLen )
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{
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goto end_pin_info;
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}
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*ppszSerialNumber = new CHAR[cbLen + 1];
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if ( !*ppszSerialNumber ||
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!pMB->GetString( NULL,
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MD_SSL_CERT_FORTEZZA_SERIAL_NUMBER,
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IIS_MD_UT_SERVER,
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|
*ppszSerialNumber,
|
|
&cbLen,
|
|
METADATA_SECURE ) )
|
|
{
|
|
goto end_pin_info;
|
|
}
|
|
|
|
|
|
//
|
|
// Retrieve personality
|
|
//
|
|
cbLen = 0;
|
|
if ( ( !pMB->GetString( NULL,
|
|
MD_SSL_CERT_FORTEZZA_PERSONALITY,
|
|
IIS_MD_UT_SERVER,
|
|
NULL,
|
|
&cbLen,
|
|
METADATA_SECURE ) &&
|
|
GetLastError() != ERROR_INSUFFICIENT_BUFFER ) ||
|
|
!cbLen )
|
|
{
|
|
goto end_pin_info;
|
|
}
|
|
|
|
*ppszPersonality = new CHAR[cbLen + 1];
|
|
|
|
if ( !*ppszPersonality ||
|
|
!pMB->GetString( NULL,
|
|
MD_SSL_CERT_FORTEZZA_PERSONALITY,
|
|
IIS_MD_UT_SERVER,
|
|
*ppszPersonality,
|
|
&cbLen,
|
|
METADATA_SECURE ) )
|
|
{
|
|
goto end_pin_info;
|
|
}
|
|
|
|
fSuccess = TRUE;
|
|
|
|
end_pin_info:
|
|
|
|
if ( !fSuccess )
|
|
{
|
|
DBGPRINTF((DBG_CONTEXT,
|
|
"RetrievePINInfo failed : 0x%x\n",
|
|
GetLastError()));
|
|
|
|
//
|
|
// Clean out all the PIN info, making sure to erase the memory
|
|
//
|
|
if ( *ppszPIN )
|
|
{
|
|
/* INTRINSA suppress = uninitialized */
|
|
memset( *ppszPIN, 0, strlen(*ppszPIN) );
|
|
delete [] *ppszPIN;
|
|
}
|
|
|
|
if ( *ppszSerialNumber )
|
|
{
|
|
memset( *ppszSerialNumber, 0, strlen(*ppszSerialNumber) );
|
|
delete [] *ppszSerialNumber;
|
|
}
|
|
|
|
if ( *ppszPersonality )
|
|
{
|
|
memset( *ppszPersonality, 0, strlen(*ppszPersonality) );
|
|
delete [] *ppszPersonality;
|
|
}
|
|
}
|
|
|
|
return fSuccess;
|
|
}
|
|
|
|
|
|
inline
|
|
BOOL IIS_SERVER_CERT::IsValid()
|
|
{
|
|
return ( m_dwStatus == CERT_ERR_NONE ? TRUE : FALSE ) ;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|