704 lines
22 KiB
C++
704 lines
22 KiB
C++
/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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certupgr.cxx
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Abstract:
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Functions used in upgrading server certs from K2 [server cert in metabase] to
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Avalanche [server cert in CAPI store].
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Author:
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Alex Mallet (amallet) 07-Dec-1997
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Boyd Multerer (boydm) 20-Jan-1998 Converted to be useful in setup
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--*/
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#include "stdafx.h"
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#include <objbase.h>
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#ifndef _CHICAGO_
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#include "oidenc.h"
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// keyring include
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//#include "intrlkey.h"
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// This stuff below is moved from above include
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#define REQUEST_HEADER_K2B2VERSION 0x0101
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#define REQUEST_HEADER_IDENTIFIER 'RHDR'
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#define REQUEST_HEADER_CURVERSION 0x0101
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typedef struct _KeyRequestHeader
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{
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DWORD Identifier; // must be 'RHDR'
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DWORD Version; // version of header record
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DWORD cbSizeOfHeader; // byte count of header. Afterwards is the request.
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DWORD cbRequestSize; // size of the request that follows
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BOOL fReqSentToOnlineCA;
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LONG longRequestID;
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BOOL fWaitingForApproval;
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char chCA[MAX_PATH];
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} KeyRequestHeader, *LPREQUEST_HEADER;
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///--- end of #include "intrlkey.h"
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//
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//Local includes
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//
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#include "certupgr.h"
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//#include "certtools.h"
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// The below define is in some interal schannel header file. John Banes
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// told me to just redefine it below as such........ - Boyd
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LPCSTR SGC_KEY_SALT = "SGCKEYSALT";
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// prototypes
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BOOL DecodeAndImportPrivateKey( PBYTE pbEncodedPrivateKey IN,
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DWORD cbEncodedPrivateKey IN,
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PCHAR pszPassword IN,
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PWCHAR pszKeyContainerIN,
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CRYPT_KEY_PROV_INFO *pCryptKeyProvInfo );
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BOOL UpdateCSPInfo( PCCERT_CONTEXT pcCertContext );
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BOOL FImportAndStoreRequest( PCCERT_CONTEXT pCert, PVOID pbPKCS10req, DWORD cbPKCS10req );
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//-------------------------------------------------------------------------
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PCCERT_CONTEXT CopyKRCertToCAPIStore_A( PVOID pbPrivateKey, DWORD cbPrivateKey,
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PVOID pbPublicKey, DWORD cbPublicKey,
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PVOID pbPKCS10req, DWORD cbPKCS10req,
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PCHAR pszPassword,
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PCHAR pszCAPIStore)
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{
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PCCERT_CONTEXT pCert = NULL;
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// prep the wide strings
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PWCHAR pszwCAPIStore = NULL;
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DWORD lenStore = (strlen(pszCAPIStore)+1) * sizeof(WCHAR);
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pszwCAPIStore = (PWCHAR)GlobalAlloc( GPTR, lenStore );
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if ( !pszwCAPIStore )
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goto cleanup;
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// convert the strings
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MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, pszCAPIStore, -1, pszwCAPIStore, lenStore );
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// do the real call
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pCert = CopyKRCertToCAPIStore_W(
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pbPrivateKey, cbPrivateKey,
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pbPublicKey, cbPublicKey,
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pbPKCS10req, cbPKCS10req,
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pszPassword,
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pszwCAPIStore );
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cleanup:
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// preserve the last error state
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DWORD err = GetLastError();
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// clean up the strings
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if ( pszwCAPIStore )
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GlobalFree( pszwCAPIStore );
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// reset the last error state
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SetLastError( err );
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// return the cert
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return pCert;
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}
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//--------------------------------------------------------------------------------------------
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// Copies an old Key-Ring style cert to the CAPI store. This cert comes in as two binaries and a password.
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PCCERT_CONTEXT CopyKRCertToCAPIStore_W( PVOID pbPrivateKey, DWORD cbPrivateKey,
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PVOID pbPublicKey, DWORD cbPublicKey,
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PVOID pbPKCS10req, DWORD cbPKCS10req,
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PCHAR pszPassword,
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PWCHAR pszCAPIStore)
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/*++
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Routine Description:
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Upgrades K2 server certs to Avalanche server certs - reads server cert out of K2
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metabase, creates cert context and stores it in CAPI2 "MY" store and writes
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relevant information back to metabase.
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Arguments:
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pMDObject - pointer to Metabase object
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pszOldMBPath - path to where server cert is stored in old MB, relative to SSL_W3_KEYS_MD_PATH
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pszNewMBPath - fully qualified path to where server cert info should be stored in new MB
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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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BOOL fSuccess = FALSE;
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HCERTSTORE hStore = NULL;
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PCCERT_CONTEXT pcCertContext = NULL;
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LPOLESTR polestr = NULL;
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// start by opening the CAPI store that we will be saving the certificate into
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hStore = CertOpenStore( CERT_STORE_PROV_SYSTEM,
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0,
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NULL,
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CERT_SYSTEM_STORE_LOCAL_MACHINE,
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pszCAPIStore );
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if ( !hStore )
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{
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// iisDebugOut((_T("Error 0x%x calling CertOpenStore \n"), GetLastError());
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goto EndUpgradeServerCert;
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}
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// at this point we check to see if a certificate was passed in. If none was, then we need
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// to create a dummy-temporary certificate that markes the private key as incomplete. That
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// way, then the real certificate comes back from verisign the regular tools can be used
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// to complete the key.
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//CertCreateSelfSignCertificate()
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//
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//Create cert context to be stored in CAPI store
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//
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pbPublicKey = (PVOID)((PBYTE)pbPublicKey + CERT_DER_PREFIX);
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cbPublicKey -= CERT_DER_PREFIX;
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pcCertContext = CertCreateCertificateContext( X509_ASN_ENCODING, (PUCHAR)pbPublicKey, cbPublicKey);
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if ( pcCertContext )
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{
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// the private key gets stored in a seperate location from the certificate and gets referred to
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// by the certificate. We should try to pick a unique name so that some other cert won't step
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// on it by accident. There is no formal format for this name whatsoever. Some groups use a
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// human-readable string, some use a hash of the cert, and some use a GUID string. All are valid
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// although for generated certs the hash or the GUID are probably better.
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// get the 128 big md5 hash of the cert for the name
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DWORD dwHashSize;
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BOOL fHash;
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BYTE MD5Hash[16]; // give it some extra size
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dwHashSize = sizeof(MD5Hash);
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fHash = CertGetCertificateContextProperty( pcCertContext,
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CERT_MD5_HASH_PROP_ID,
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(VOID *) MD5Hash,
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&dwHashSize );
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// Since the MD5 hash is the same size as a guid, we can use the guid utilities to make a
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// nice string out of it.
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HRESULT hresult;
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hresult = StringFromCLSID( (REFCLSID)MD5Hash, &polestr );
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//
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// Now decode private key blob and import it into CAPI1 private key
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//
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CRYPT_KEY_PROV_INFO CryptKeyProvInfo;
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if ( DecodeAndImportPrivateKey( (PUCHAR)pbPrivateKey, cbPrivateKey, pszPassword,
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polestr, &CryptKeyProvInfo ) )
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{
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//
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// Add the private key to the cert context
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//
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BOOL f;
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f = CertSetCertificateContextProperty( pcCertContext, CERT_KEY_PROV_INFO_PROP_ID,
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0, &CryptKeyProvInfo );
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f = UpdateCSPInfo( pcCertContext );
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if ( f )
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{
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//
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// Store it in the provided store
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//
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if ( CertAddCertificateContextToStore( hStore, pcCertContext,
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CERT_STORE_ADD_REPLACE_EXISTING, NULL ) )
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{
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fSuccess = TRUE;
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// Write out the original request as a property on the cert
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FImportAndStoreRequest( pcCertContext, pbPKCS10req, cbPKCS10req );
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}
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else
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{
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// iisDebugOut((_T("Error 0x%x calling CertAddCertificateContextToStore"), GetLastError());
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}
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}
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else
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{
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// iisDebugOut((_T("Error 0x%x calling CertSetCertificateContextProperty"), GetLastError());
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}
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}
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}
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else
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{
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// iisDebugOut((_T("Error 0x%x calling CertCreateCertificateContext"), GetLastError());
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}
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//
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//Cleanup that's done only on failure
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//
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if ( !fSuccess )
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{
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if ( pcCertContext )
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{
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CertFreeCertificateContext( pcCertContext );
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}
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pcCertContext = NULL;
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}
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EndUpgradeServerCert:
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// cleanup
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if ( hStore )
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CertCloseStore ( hStore, 0 );
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if ( polestr )
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CoTaskMemFree( polestr );
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// return the answer
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return pcCertContext;
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}
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//--------------------------------------------------------------------------------------------
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BOOL UpdateCSPInfo( PCCERT_CONTEXT pcCertContext )
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{
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BYTE cbData[1000];
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CRYPT_KEY_PROV_INFO* pProvInfo = (CRYPT_KEY_PROV_INFO *) cbData;
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DWORD dwFoo = 1000;
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BOOL fSuccess = TRUE;
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if ( ! CertGetCertificateContextProperty( pcCertContext,
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CERT_KEY_PROV_INFO_PROP_ID,
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pProvInfo,
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&dwFoo ) )
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{
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fSuccess = FALSE;
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// iisDebugOut((_T("Fudge. failed to get property : 0x%x"), GetLastError());
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}
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else
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{
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pProvInfo->dwProvType = PROV_RSA_SCHANNEL;
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pProvInfo->pwszProvName = NULL;
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if ( !CertSetCertificateContextProperty( pcCertContext,
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CERT_KEY_PROV_INFO_PROP_ID,
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0,
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pProvInfo ) )
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{
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fSuccess = FALSE;
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// iisDebugOut((_T("Fudge. failed to set property : 0x%x"), GetLastError());
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}
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}
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// return success
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return fSuccess;
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}
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//--------------------------------------------------------------------------------------------
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BOOL DecodeAndImportPrivateKey( PBYTE pbEncodedPrivateKey IN,
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DWORD cbEncodedPrivateKey IN,
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PCHAR pszPassword IN,
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PWCHAR pszKeyContainer IN,
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CRYPT_KEY_PROV_INFO *pCryptKeyProvInfo )
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/*++
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Routine Description:
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Converts the private key stored in the metabase, in Schannel-internal format,
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into a key that can be imported via CryptImportKey() to create a CAP1 key blob.
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Arguments:
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pbEncodedPrivateKey - pointer to [encoded] private key
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cbEncodedPrivateKey - size of encoded private key blob
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pszPassword - password used to encode private key
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pszKeyContainer - container name for private key
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pCryptKeyProvInfo - pointer to CRYPT_KEY_PROV_INFO structure filled in on success
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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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BOOL fSuccess = FALSE;
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DWORD cbPassword = strlen(pszPassword);
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PPRIVATE_KEY_FILE_ENCODE pPrivateFile = NULL;
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DWORD cbPrivateFile = 0;
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MD5_CTX md5Ctx;
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struct RC4_KEYSTRUCT rc4Key;
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DWORD i;
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HCRYPTPROV hProv = NULL;
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HCRYPTKEY hPrivateKey = NULL;
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DWORD cbDecodedPrivateKey = 0;
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PBYTE pbDecodedPrivateKey = NULL;
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DWORD err;
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//
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//HACK HACK HACK - need to make sure Schannel is initialized, so it registers
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//its custom decoders, which we make use of in the following code. So, make a
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//bogus call to an Schannel function
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// Note: on NT5, the AcquireCredentialsHandle operates in the lsass process and
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// thus will not properly initialize the stuff we need in our process. Thus we
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// call SslGenerateRandomBits instead.
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//
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DWORD dw;
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SslGenerateRandomBits( (PUCHAR)&dw, sizeof(dw) );
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// We have to do a little fixup here. Old versions of
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// schannel wrote the wrong header data into the ASN
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// for private key files, so we must fix the size data.
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pbEncodedPrivateKey[2] = (BYTE) (((cbEncodedPrivateKey - 4) & 0xFF00) >> 8); //Get MSB
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pbEncodedPrivateKey[3] = (BYTE) ((cbEncodedPrivateKey - 4) & 0xFF); //Get LSB
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//
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// ASN.1 decode the private key.
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//
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//
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// Figure out the size of the buffer needed
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//
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if( !CryptDecodeObject(X509_ASN_ENCODING,
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szPrivateKeyFileEncode,
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pbEncodedPrivateKey,
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cbEncodedPrivateKey,
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0,
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NULL,
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&cbPrivateFile) )
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{
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err = GetLastError();
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// iisDebugOut((_T("Error 0x%x decoding the private key"), err);
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goto EndDecodeKey;
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}
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pPrivateFile = (PPRIVATE_KEY_FILE_ENCODE) LocalAlloc( LPTR, cbPrivateFile );
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if(pPrivateFile == NULL)
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{
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SetLastError( ERROR_OUTOFMEMORY );
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goto EndDecodeKey;
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}
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//
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// Actually fill in the buffer
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//
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if( !CryptDecodeObject( X509_ASN_ENCODING,
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szPrivateKeyFileEncode,
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pbEncodedPrivateKey,
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cbEncodedPrivateKey,
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0,
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pPrivateFile,
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&cbPrivateFile ) )
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{
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err = GetLastError();
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// iisDebugOut((_T("Error 0x%x decoding the private key"), err);
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goto EndDecodeKey;
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}
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//
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// Decrypt the decoded private key using the password.
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//
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MD5Init(&md5Ctx);
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MD5Update(&md5Ctx, (PBYTE) pszPassword, cbPassword);
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MD5Final(&md5Ctx);
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rc4_key( &rc4Key, 16, md5Ctx.digest );
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// memset( &md5Ctx, 0, sizeof(md5Ctx) );
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rc4( &rc4Key,
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pPrivateFile->EncryptedBlob.cbData,
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pPrivateFile->EncryptedBlob.pbData );
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//
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// Build a PRIVATEKEYBLOB from the decrypted private key.
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//
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//
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// Figure out size of buffer needed
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//
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if( !CryptDecodeObject( X509_ASN_ENCODING,
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szPrivateKeyInfoEncode,
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pPrivateFile->EncryptedBlob.pbData,
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pPrivateFile->EncryptedBlob.cbData,
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0,
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NULL,
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&cbDecodedPrivateKey ) )
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{
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// NOTE: This stuff is complicated!!! The following code came
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// from John Banes. Heck this whole routine pretty much came
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// from John Banes. -- Boyd
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// Maybe this was a SGC style key.
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// Re-encrypt it, and build the SGC decrypting
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// key, and re-decrypt it.
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BYTE md5Digest[MD5DIGESTLEN];
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rc4_key(&rc4Key, 16, md5Ctx.digest);
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rc4(&rc4Key,
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pPrivateFile->EncryptedBlob.cbData,
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pPrivateFile->EncryptedBlob.pbData);
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CopyMemory(md5Digest, md5Ctx.digest, MD5DIGESTLEN);
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MD5Init(&md5Ctx);
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MD5Update(&md5Ctx, md5Digest, MD5DIGESTLEN);
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MD5Update(&md5Ctx, (PUCHAR)SGC_KEY_SALT, strlen(SGC_KEY_SALT));
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MD5Final(&md5Ctx);
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rc4_key(&rc4Key, 16, md5Ctx.digest);
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rc4(&rc4Key,
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pPrivateFile->EncryptedBlob.cbData,
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pPrivateFile->EncryptedBlob.pbData);
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// Try again...
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if(!CryptDecodeObject(X509_ASN_ENCODING,
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szPrivateKeyInfoEncode,
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pPrivateFile->EncryptedBlob.pbData,
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pPrivateFile->EncryptedBlob.cbData,
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0,
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NULL,
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&cbDecodedPrivateKey))
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{
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ZeroMemory(&md5Ctx, sizeof(md5Ctx));
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err = GetLastError();
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goto EndDecodeKey;
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}
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}
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pbDecodedPrivateKey = (PBYTE) LocalAlloc( LPTR, cbDecodedPrivateKey );
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if( pbDecodedPrivateKey == NULL )
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{
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SetLastError( ERROR_OUTOFMEMORY );
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goto EndDecodeKey;
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}
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//
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// Actually fill in the buffer
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//
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if( !CryptDecodeObject( X509_ASN_ENCODING,
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szPrivateKeyInfoEncode,
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pPrivateFile->EncryptedBlob.pbData,
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pPrivateFile->EncryptedBlob.cbData,
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0,
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pbDecodedPrivateKey,
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&cbDecodedPrivateKey ) )
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{
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err = GetLastError();
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// iisDebugOut((_T("Error 0x%x decoding the private key"), err);
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goto EndDecodeKey;
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}
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// On NT 4 the ff holds true : <- from Alex Mallet
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// Although key is going to be used for key exchange, mark it as being
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// used for signing, because only 512-bit key exchange keys are supported
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// in the non-domestic rsabase.dll, whereas signing keys can be up to
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// 2048 bits.
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//
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// On NT 5, PROV_RSA_FULL should be changed to PROV_RSA_SCHANNEL, and
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// aiKeyAlg to CALG_RSA_KEYX, because PROV_RSA_SCHANNEL, which is only
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// installed on NT 5, supports 1024-bit private keys for key exchange
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//
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// On NT4, Schannel doesn't care whether a key is marked for signing or exchange,
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// but on NT5 it does, so aiKeyAlg must be set appropriately
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//
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((BLOBHEADER *) pbDecodedPrivateKey)->aiKeyAlg = CALG_RSA_KEYX;
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//
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// Clean out the key container, pszKeyContainer
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//
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CryptAcquireContext(&hProv,
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pszKeyContainer,
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NULL,
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PROV_RSA_SCHANNEL,
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CRYPT_DELETEKEYSET | CRYPT_MACHINE_KEYSET);
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//
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// Create a CryptoAPI key container in which to store the key.
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//
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if( !CryptAcquireContext( &hProv,
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pszKeyContainer,
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NULL,
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PROV_RSA_SCHANNEL,
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CRYPT_NEWKEYSET | CRYPT_MACHINE_KEYSET))
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{
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err = GetLastError();
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// iisDebugOut((_T("Error 0x%x calling CryptAcquireContext"), err);
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goto EndDecodeKey;
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}
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//
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// Import the private key blob into the key container.
|
|
//
|
|
if( !CryptImportKey( hProv,
|
|
pbDecodedPrivateKey,
|
|
cbDecodedPrivateKey,
|
|
0,
|
|
CRYPT_EXPORTABLE, //so we can export it later
|
|
&hPrivateKey ) )
|
|
{
|
|
err = GetLastError();
|
|
// iisDebugOut((_T("Error 0x%x importing PRIVATEKEYBLOB"), err);
|
|
goto EndDecodeKey;
|
|
}
|
|
|
|
|
|
//
|
|
// Fill in the CRYPT_KEY_PROV_INFO structure, with the same parameters we
|
|
// used in the call to CryptAcquireContext() above
|
|
//
|
|
|
|
//
|
|
// container name in the structure is a unicode string, so we need to convert
|
|
//
|
|
|
|
if ( pszKeyContainer != NULL )
|
|
{
|
|
// point the key container name to the passed in string
|
|
// WARNING: this does not actually copy the string, just the pointer
|
|
// to it. So the strings needs to remain valid until the ProvInfo is commited.
|
|
pCryptKeyProvInfo->pwszContainerName = pszKeyContainer;
|
|
}
|
|
else
|
|
{
|
|
pCryptKeyProvInfo->pwszContainerName = NULL;
|
|
}
|
|
|
|
pCryptKeyProvInfo->pwszProvName = NULL;
|
|
pCryptKeyProvInfo->dwProvType = PROV_RSA_FULL;
|
|
pCryptKeyProvInfo->dwFlags = 0x20; // allow the cert to be exchanged
|
|
pCryptKeyProvInfo->cProvParam = 0;
|
|
pCryptKeyProvInfo->rgProvParam = NULL;
|
|
pCryptKeyProvInfo->dwKeySpec = AT_KEYEXCHANGE; // allow the cert to be exchanged
|
|
|
|
fSuccess = TRUE;
|
|
|
|
EndDecodeKey:
|
|
|
|
//
|
|
// Clean-up that happens regardless of success/failure
|
|
//
|
|
if ( pPrivateFile )
|
|
{
|
|
LocalFree( pPrivateFile );
|
|
}
|
|
|
|
if ( pbDecodedPrivateKey )
|
|
{
|
|
LocalFree( pbDecodedPrivateKey );
|
|
}
|
|
|
|
if ( hPrivateKey )
|
|
{
|
|
CryptDestroyKey( hPrivateKey );
|
|
}
|
|
|
|
if ( hProv )
|
|
{
|
|
CryptReleaseContext( hProv, 0 );
|
|
}
|
|
|
|
return fSuccess;
|
|
|
|
|
|
} //DecodeAndImportPrivateKey
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Takes an incoming PKCS10 request and saves it as a property attached to the key. It also
|
|
checks if the request is in the old internal Keyring format or not......
|
|
|
|
Arguments:
|
|
|
|
pCert - CAPI certificate context pointer for the cert to save the request on
|
|
pbPKCS10req - pointer to the request
|
|
cbPKCS10req - size of the request
|
|
|
|
Returns:
|
|
|
|
BOOL indicating success/failure
|
|
|
|
--*/
|
|
BOOL FImportAndStoreRequest( PCCERT_CONTEXT pCert, PVOID pbPKCS10req, DWORD cbPKCS10req )
|
|
{
|
|
BOOL f;
|
|
DWORD err;
|
|
|
|
// if any NULLS are passed in, fail gracefully
|
|
if ( !pCert || !pbPKCS10req || !cbPKCS10req )
|
|
return FALSE;
|
|
|
|
// first, check if the incoming request is actually pointing to an old KeyRing internal
|
|
// request format. That just means that the real request is actuall slightly into
|
|
// the block. The way you tell is by testing the first DWORD to see it
|
|
// is REQUEST_HEADER_IDENTIFIER
|
|
// start by seeing if this is a new style key request
|
|
LPREQUEST_HEADER pHeader = (LPREQUEST_HEADER)pbPKCS10req;
|
|
if ( pHeader->Identifier == REQUEST_HEADER_IDENTIFIER )
|
|
{
|
|
// update the request pointer and data count
|
|
pbPKCS10req = (PBYTE)pbPKCS10req + pHeader->cbSizeOfHeader;
|
|
cbPKCS10req = pHeader->cbRequestSize;
|
|
}
|
|
|
|
// now save the request onto the key
|
|
CRYPT_DATA_BLOB dataBlob;
|
|
ZeroMemory( &dataBlob, sizeof(dataBlob) );
|
|
dataBlob.pbData = (PBYTE)pbPKCS10req; // pointer to blob data
|
|
dataBlob.cbData = cbPKCS10req; // blob length info
|
|
f = CertSetCertificateContextProperty(
|
|
pCert,
|
|
CERTWIZ_REQUEST_PROP_ID,
|
|
0,
|
|
&dataBlob
|
|
);
|
|
err = GetLastError();
|
|
|
|
/*
|
|
HRESULT hRes = CertTool_SetBinaryBlobProp(
|
|
pCert, // cert context to set the prop on
|
|
pbPKCS10req, // pointer to blob data
|
|
cbPKCS10req, // blob length info
|
|
CERTWIZ_REQUEST_PROP_ID,// property ID for context
|
|
TRUE // the request is already encoded
|
|
);
|
|
*/
|
|
|
|
return f;
|
|
}
|
|
|
|
|
|
|
|
#endif //_CHICAGO_
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|