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882 lines
26 KiB
882 lines
26 KiB
//////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 1998-2000 Microsoft Corporation. All Rights Reserved.
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//
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// No portion of this source code may be reproduced
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// without express written permission of Microsoft Corporation.
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//
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// This source code is proprietary and confidential.
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//
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// SYSTEM: Industry Update
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//
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// CLASS: N/A
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// MODULE: TRUST.LIB
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// FILE: Trust.CPP
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//
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/////////////////////////////////////////////////////////////////////
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//
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// DESC: this file implements the functions used to make cabs
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// signed by certain providers trusted.
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//
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//
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// AUTHOR: Charles Ma, converted from WU CDMLIB
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// DATE: 10/4/2000
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//
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/////////////////////////////////////////////////////////////////////
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//
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// Revision History:
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//
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// Date Author Description
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// ~~~~ ~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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//
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/////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include <wintrust.h>
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#include <softpub.h>
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#include "trust.h"
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#include "TrustPriv.h"
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#include "wusafefn.h"
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#if !defined(DISABLE_IU_LOGGING)
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#include <MemUtil.h>
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#include <logging.h>
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#endif
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#if defined(DEBUG) || defined(DBG)
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#ifdef DISABLE_IU_POLICY // in debug mode, we enable pop up check
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#undef DISABLE_IU_POLICY
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#endif
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#else
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#define DISABLE_IU_POLICY // in release mode, we never allow cert pop up!
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#endif
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#if defined(__WUIUTEST) || !defined(DISABLE_IU_POLICY)
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const TCHAR REGKEY_IUCTL[] = _T("Software\\Microsoft\\Windows\\CurrentVersion\\WindowsUpdate\\IUControl");
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#endif
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/////////////////////////////////////////////////////////////////////////////
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//
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// typedefs for APIs used in the CheckTrust() function
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//
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// Since some of these APIs are new and only available on IE5 we have to
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// try to dynamicaly use them when available and do without the extra checks
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// when we are on an OS that has not been upgraded to the new crypto code.
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//
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/////////////////////////////////////////////////////////////////////////////
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#define WINTRUST _T("wintrust.dll")
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#define CRYPT32 _T("crypt32.dll")
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#if !defined(USES_IU_CONVERSION) && defined(USES_CONVERSION)
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#define USES_IU_CONVERSION USES_CONVERSION
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#endif
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//
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// declare a global crypt32.dll library handler, so we don't
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// need to load the library every time these functions are called.
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// NOTE: we do not release the library though. When the process of
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// calling this feature exits, the library is released.
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// same as wintrust.dll
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//
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static HINSTANCE shWinTrustDllInst = NULL;
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static HINSTANCE shCrypt32DllInst = NULL;
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//
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// define prototype for function WinVerifyTrust()
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// and declare a global variable to point to this function
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//
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typedef HRESULT
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(WINAPI * PFNWinVerifyTrust)(
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HWND hwnd, GUID *ActionID, LPVOID ActionData);
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PFNWinVerifyTrust pfnWinVerifyTrust = NULL;
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//
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// define prototype for function WTHelperProvDataFromStateData()
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// and declare a global variable to point to this function
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//
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typedef CRYPT_PROVIDER_DATA *
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(WINAPI * PFNWTHelperProvDataFromStateData)(
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HANDLE hStateData);
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PFNWTHelperProvDataFromStateData pfnWTHelperProvDataFromStateData = NULL;
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//
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// define prototype for function WTHelperGetProvSignerFromChain()
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// and declare a global variable to point to this function
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//
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typedef CRYPT_PROVIDER_SGNR *
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(WINAPI * PFNWTHelperGetProvSignerFromChain)(
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CRYPT_PROVIDER_DATA *pProvData,
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DWORD idxSigner,
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BOOL fCounterSigner,
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DWORD idxCounterSigner);
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PFNWTHelperGetProvSignerFromChain pfnWTHelperGetProvSignerFromChain = NULL;
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//
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// define prototype for function PFNWTHelperGetProvCertFromChain()
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// and declare a global variable to point to this function
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//
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typedef CRYPT_PROVIDER_CERT *
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(WINAPI * PFNWTHelperGetProvCertFromChain)(
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CRYPT_PROVIDER_SGNR *pSgnr,
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DWORD idxCert);
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PFNWTHelperGetProvCertFromChain pfnWTHelperGetProvCertFromChain = NULL;
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//
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// define prototype for function CryptHashPublicKeyInfo()
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// and declare a global variable to point to this function
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//
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typedef BOOL
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(WINAPI * PFNCryptHashPublicKeyInfo)(
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HCRYPTPROV hCryptProv,
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ALG_ID Algid,
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DWORD dwFlags,
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DWORD dwCertEncodingType,
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PCERT_PUBLIC_KEY_INFO pInfo,
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BYTE *pbComputedHash,
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DWORD *pcbComputedHash);
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PFNCryptHashPublicKeyInfo pfnCryptHashPublicKeyInfo = NULL;
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//
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// define prototype for function CertGetCertificateContextProperty()
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// and declare a global variable to point to this function
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//
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typedef BOOL
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(WINAPI * PFNCertGetCertificateContextProperty)(
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PCCERT_CONTEXT pCertContext,
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DWORD dwPropId,
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void *pvData,
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DWORD *pcbData);
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PFNCertGetCertificateContextProperty pfnCertGetCertificateContextProperty = NULL;
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/////////////////////////////////////////////////////////////////////////////
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//
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// pre-defined cert data to check against
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//
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/////////////////////////////////////////////////////////////////////////////
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//
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// The following is the sha1 key identifier for the Microsoft root
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//
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static const BYTE rgbSignerRootKeyIds[40] = {
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0x4A, 0x5C, 0x75, 0x22, 0xAA, 0x46, 0xBF, 0xA4, 0x08, 0x9D, // the original MS root
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0x39, 0x97, 0x4E, 0xBD, 0xB4, 0xA3, 0x60, 0xF7, 0xA0, 0x1D,
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0x0E, 0xAC, 0x82, 0x60, 0x40, 0x56, 0x27, 0x97, 0xE5, 0x25, // the new "son of MS root"
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0x13, 0xFC, 0x2A, 0xE1, 0x0A, 0x53, 0x95, 0x59, 0xE4, 0xA4
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};
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//
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// define the size of each hash values in the known id buffer
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// for special certs.
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//
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const size_t ExpectedKnownCertHashSize = 20;
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//
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// this is the size of buffer to receive the cert hash value
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// it must be not less than the largest number in the
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// above-defined array
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//
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const size_t ShaBufSize = 20;
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//
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// id buffer to store SH1 hashing values of known Microsoft
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// certs (signature) that we should recognize.
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// Warning: the size of this buffer should match the sum
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// of size_t values defined above.
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//
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static const BYTE rgbSpecialCertId[200] = {
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0xB1,0x59,0xA5,0x2E,0x3D,0xD8,0xCE,0xCD,0x3A,0x9A,0x4A,0x7A,0x73,0x92,0xAA,0x8D,0xA7,0xE7,0xD6,0x7F, // MS cert
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0xB1,0xC7,0x75,0xE0,0x4A,0x9D,0xFD,0x23,0xB6,0x18,0x97,0x11,0x5E,0xF6,0xEA,0x6B,0x99,0xEC,0x76,0x1D, // MSN cert
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0x11,0xC7,0x10,0xF3,0xCB,0x6C,0x43,0xE1,0x66,0xEC,0x64,0x1C,0x7C,0x01,0x17,0xC4,0xB4,0x10,0x35,0x30, // MSNBC cert
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0x95,0x25,0x58,0xD4,0x07,0xDE,0x4A,0xFD,0xAE,0xBA,0x13,0x72,0x83,0xC2,0xB3,0x37,0x04,0x90,0xC9,0x8A, // MSN Europe
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0x72,0x54,0x14,0x91,0x1D,0x6E,0x10,0x84,0x8E,0x0F,0xFA,0xA0,0xB0,0xA1,0x65,0xBF,0x44,0x8F,0x9F,0x6D, // MS Europe
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0x20,0x5E,0x48,0x43,0xAB,0xAD,0x54,0x77,0x71,0xBD,0x8D,0x1A,0x3C,0xE0,0xE5,0x9D,0xF5,0xBD,0x25,0xF9, // Old MS cert: 97~98
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0xD6,0xCD,0x01,0x90,0xB3,0x1B,0x31,0x85,0x81,0x12,0x23,0x14,0xB5,0x17,0xA0,0xAA,0xCE,0xF2,0x7B,0xD5, // Old MS cert: 98~99
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0x8A,0xA1,0x37,0xF5,0x03,0x9F,0xE0,0x28,0xC9,0x26,0xAA,0x55,0x90,0x14,0x19,0x68,0xFA,0xFF,0xE8,0x1A, // Old MS cert: 99~00
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0xF3,0x25,0xF8,0x67,0x07,0x29,0xE5,0x27,0xF3,0x77,0x52,0x34,0xE0,0x51,0x57,0x69,0x0F,0x40,0xC6,0x1C, // Old MS Europe cert: 99~00
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0x6A,0x71,0xFE,0x54,0x8A,0x51,0x08,0x70,0xF9,0x8A,0x56,0xCA,0x11,0x55,0xF6,0x76,0x45,0x92,0x02,0x5A // Old MS Europe cert: 98~99
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};
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/////////////////////////////////////////////////////////////////////////////
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//
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// Private Function ULONG CompareMem(PVOID pBlock1, PVOID pBlock2, ULONG Length)
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//
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// This function acts in the same way as RtlCompareMemory()
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//
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//
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// Input: two pointers to two memory blocks, and a byte size to compare
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// Return: the number of bytes that compared as equal.
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// If all bytes compare as equal, the input Length is returned.
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// If any pointer is NULL, 0 is returned.
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//
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/////////////////////////////////////////////////////////////////////////////
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ULONG CompareMem(const BYTE* pBlock1, const BYTE* pBlock2, ULONG Length)
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{
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ULONG uLen = 0L;
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if (pBlock1 != NULL && pBlock2 != NULL)
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{
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for (; uLen < Length; uLen++, pBlock1++, pBlock2++)
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{
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if (*pBlock1 != *pBlock2) return uLen;
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}
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}
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return uLen;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// Private Function VerifyMSRoot()
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//
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// This function takes the passed-in certificate as a root cert,
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// and verifies its public key hash value is the same as
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// known "Microsoft Root Authority" cert value.
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//
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//
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// Input: hCrypt32DllInst - handle point to loaded crypt32.dll library
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// pRootCert - the certificate context of the root cert
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//
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// Return: HRESULT - result of execution, S_OK if matched.
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// the result code, in case of error, are code retuned by
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// crypt32.dll, with these the exception of E_INVALIDARG if
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// the passed-in parameters are NULL.
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//
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/////////////////////////////////////////////////////////////////////////////
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HRESULT VerifyMSRoot(
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HINSTANCE hCrypt32DllInst, // handle point to loaded crypt32.dll librar
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PCCERT_CONTEXT pRootCert
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)
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{
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HRESULT hr = S_OK;
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BYTE rgbKeyId[ExpectedKnownCertHashSize];
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DWORD cbKeyId = sizeof(rgbKeyId);
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LOG_Block("VerifyMSRoot()");
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//
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// valid parameter values
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//
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if (NULL == hCrypt32DllInst || NULL == pRootCert)
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{
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hr = E_INVALIDARG;
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goto ErrHandler;
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}
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//
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// get the function we need from the passed in library handle
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// If not available, return error
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//
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if (NULL == (pfnCryptHashPublicKeyInfo = (PFNCryptHashPublicKeyInfo)
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GetProcAddress(hCrypt32DllInst, "CryptHashPublicKeyInfo")))
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{
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hr = HRESULT_FROM_WIN32(ERROR_INVALID_FUNCTION);
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goto ErrHandler;
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}
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//
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// get the public key hash value of this cert
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//
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ZeroMemory(rgbKeyId, sizeof(rgbKeyId));
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if (!pfnCryptHashPublicKeyInfo(
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0, // use default crypto svc provider
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CALG_SHA1, // use SHA algorithm
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0, // dwFlags
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X509_ASN_ENCODING,
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&pRootCert->pCertInfo->SubjectPublicKeyInfo,
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rgbKeyId,
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&cbKeyId
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))
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{
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hr = HRESULT_FROM_WIN32(GetLastError());
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goto ErrHandler;
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}
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//
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// compare the hash value of public key of this root cert with the known MS root cert value
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//
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if (ExpectedKnownCertHashSize != cbKeyId ||
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(cbKeyId != CompareMem(rgbSignerRootKeyIds, rgbKeyId, cbKeyId) &&
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cbKeyId != CompareMem(rgbSignerRootKeyIds + ExpectedKnownCertHashSize, rgbKeyId, cbKeyId)
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)
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)
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{
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hr = S_FALSE;
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}
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ErrHandler:
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if (FAILED(hr))
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{
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LOG_ErrorMsg(hr);
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}
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else
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{
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LOG_Trust(_T("Exit VerifyMSRoot() with %s"), (S_OK == hr) ? _T("S_OK") : _T("S_FALSE"));
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}
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return hr;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// Private Function VerifySpecialMSCerts()
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//
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// This function takes the passed-in certificate as a leaf cert,
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// and verifies its hash value matches the hash value of one of
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// known Microsoft special certs that does not have MS root.
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//
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// The known certs are, in comparing order:
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// Microsoft Corporation
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// Microsoft Corporation MSN
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// MSNBC Interactive News LLC
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// Microsoft Corporation MSN (Europe)
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// Microsoft Corporation (Europe)
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//
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//
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// Input: hCrypt32DllInst - handle point to loaded crypt32.dll library
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// pRootCert - the certificate context of the root cert
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// pbSha1HashVal - if not NULL, compare to this one, instead of
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// hard-coded hash values. this is the case
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// of working on 3rd party package
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//
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// Return: HRESULT - result of execution, S_OK if matched.
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// if not matched, CERT_E_UNTRUSTEDROOT, or
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// E_INVALIDARG if arguments not right, or
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// crypt32.dll error returned by API calls
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//
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/////////////////////////////////////////////////////////////////////////////
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HRESULT VerifyKnownCerts(
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HINSTANCE hCrypt32DllInst, // handle point to loaded crypt32.dll librar
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PCCERT_CONTEXT pLeafCert,
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pCERT_HASH_ARRAY pKnownCertsData
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)
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{
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HRESULT hr = S_FALSE;
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BYTE btShaBuffer[ShaBufSize];
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DWORD dwSize = sizeof(btShaBuffer);
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BYTE const * pId;
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LOG_Block("VerifyKnownCerts()");
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//
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// valid parameter values
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//
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if (NULL == hCrypt32DllInst || NULL == pLeafCert)
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{
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hr = E_INVALIDARG;
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goto ErrHandler;
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}
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|
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//
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// get the function we need from the passed in library handle
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// If not available, return error
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//
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if (NULL == (pfnCertGetCertificateContextProperty = (PFNCertGetCertificateContextProperty)
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GetProcAddress(hCrypt32DllInst, "CertGetCertificateContextProperty")))
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{
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hr = HRESULT_FROM_WIN32(ERROR_INVALID_FUNCTION);
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goto ErrHandler;
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}
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|
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//
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// find out the id hash of leaf cert
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//
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ZeroMemory(btShaBuffer, dwSize);
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if (!pfnCertGetCertificateContextProperty(
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pLeafCert, // pCertContext
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CERT_SHA1_HASH_PROP_ID, // dwPropId
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btShaBuffer,
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&dwSize
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))
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|
{
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hr = GetLastError();
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|
goto ErrHandler;
|
|
}
|
|
|
|
|
|
if (NULL == pKnownCertsData)
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{
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int i;
|
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//
|
|
// iterrate through all known id hash values to see if this file is signed
|
|
// with any of these special certs.
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//
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hr = S_FALSE;
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for (i = 0,pId = rgbSpecialCertId;
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i < sizeof(rgbSpecialCertId)/ExpectedKnownCertHashSize;
|
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i++, pId += ExpectedKnownCertHashSize)
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|
{
|
|
if (ExpectedKnownCertHashSize == dwSize &&
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|
dwSize == CompareMem(btShaBuffer, pId, dwSize))
|
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{
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//
|
|
// found a matching known cert!
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//
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hr = S_OK;
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LOG_Trust(_T("Found hash matching on #%d of %d MS certs!"), i, sizeof(rgbSpecialCertId)/ExpectedKnownCertHashSize);
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break;
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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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//
|
|
// check if the retrieved hashing value matches the one passed in.
|
|
//
|
|
UINT i;
|
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LOG_Trust(_T("Comparing retrieved hash value with passed-in key"));
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hr = S_FALSE;
|
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for (i = 0, pId = pKnownCertsData->pCerts; i < pKnownCertsData->uiCount;
|
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i++, pId += HASH_VAL_SIZE)
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|
{
|
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if (dwSize == HASH_VAL_SIZE &&
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HASH_VAL_SIZE == CompareMem(btShaBuffer, pId, HASH_VAL_SIZE))
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{
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hr = S_OK;
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LOG_Trust(_T("Found hash matching #%d of %d passed-in certs!"),
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i, pKnownCertsData->uiCount);
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break;
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}
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}
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|
}
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|
|
|
ErrHandler:
|
|
|
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if (FAILED(hr))
|
|
{
|
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LOG_ErrorMsg(hr);
|
|
}
|
|
else
|
|
{
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LOG_Trust(_T("Exit VerifyKnownCerts() with %s"), (S_OK == hr) ? _T("S_OK") : _T("S_FALSE"));
|
|
}
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|
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return hr;
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|
|
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}
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|
|
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Private Function CheckWinTrust()
|
|
//
|
|
// This function will return the HRESULT for the trust state on the
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|
// specified file. The file can be pointing to any URL or local file.
|
|
// The verification will be done by the wintrust.dll.
|
|
//
|
|
// dwUIChoice is WTD_UI_NONE, WTD_UI_ALL, etc. (defined in wintrust.h).
|
|
// dwCheckRevocation is WTD_REVOKE_NONE (default) or WTD_REVOKE_WHOLE_CHAIN.
|
|
//
|
|
// Input: Fully qualified filename, UIChoice, dwCheckRevocation
|
|
// Return: HRESULT - result of execution
|
|
//
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
HRESULT CheckWinTrust(LPCTSTR pszFileName, pCERT_HASH_ARRAY pCertsData, DWORD dwUIChoice, DWORD dwCheckRevocation)
|
|
{
|
|
|
|
LOG_Block("CheckWinTrust()");
|
|
|
|
#if !defined(UNICODE) && !defined(_UNICODE)
|
|
USES_IU_CONVERSION;
|
|
#endif
|
|
|
|
// Now verify the file
|
|
WINTRUST_DATA winData;
|
|
WINTRUST_FILE_INFO winFile;
|
|
GUID gAction = WINTRUST_ACTION_GENERIC_VERIFY_V2;
|
|
CRYPT_PROVIDER_DATA const *pProvData = NULL;
|
|
CRYPT_PROVIDER_SGNR *pProvSigner = NULL;
|
|
CRYPT_PROVIDER_CERT *pProvCert = NULL;
|
|
HRESULT hr = S_OK;
|
|
|
|
|
|
#ifdef __WUIUTEST
|
|
{
|
|
LOG_Trust(_T("CheckWinTrust _IUTEST Handling Begins"));
|
|
//
|
|
// handling test case:
|
|
// if a reg key value is set to 1, then we will see if we need to pop up ALL certs
|
|
//
|
|
// NOTE:
|
|
//
|
|
// for the certs that user has checked "Always trust this provider..." previously,
|
|
// WinCheckTrust() API will still NOT show any UI even if we signal Show-ALL flag
|
|
//
|
|
HKEY hkey;
|
|
DWORD dwWinTrustUI = 0;
|
|
DWORD dwSize = sizeof(dwWinTrustUI);
|
|
|
|
if (NO_ERROR == RegOpenKeyEx(HKEY_LOCAL_MACHINE, REGKEY_IUCTL, 0, KEY_READ, &hkey))
|
|
{
|
|
RegQueryValueEx(hkey, _T("WinTrustUI"), 0, 0, (LPBYTE)&dwWinTrustUI, &dwSize);
|
|
RegCloseKey(hkey);
|
|
LOG_Trust(_T("Found regval %s\\WinTrustUI=%x"), REGKEY_IUCTL, dwWinTrustUI);
|
|
}
|
|
if (0x1 == dwWinTrustUI && WTD_UI_NONE != dwUIChoice)
|
|
{
|
|
//
|
|
// if there is a WinTrustUI reg key exist, and value is 1
|
|
// and caller does not request silence, then we
|
|
// pop up all certs
|
|
//
|
|
LOG_Trust(_T("Change UI choice to WTD_UI_ALL"));
|
|
dwUIChoice = WTD_UI_ALL;
|
|
}
|
|
|
|
if (0x2 == dwWinTrustUI)
|
|
{
|
|
//
|
|
// if reg vlaue is 2, we pop up any cert no matter caller
|
|
// says showing UI or not
|
|
//
|
|
LOG_Trust(_T("Changed UI choice from %d to WTD_UI_NOGOOD"));
|
|
dwUIChoice = WTD_UI_ALL;
|
|
}
|
|
|
|
if (0x3 == dwWinTrustUI)
|
|
{
|
|
//
|
|
// if reg value is 3, we pop up bad (include test) cert no matter
|
|
// caller allow showing UI or not
|
|
//
|
|
LOG_Trust(_T("Changed UI choice from %d to WTD_UI_NOGOOD"));
|
|
dwUIChoice = WTD_UI_NOGOOD;
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
|
|
//
|
|
// dynamically load the wintrust.dll
|
|
//
|
|
if (NULL == shWinTrustDllInst)
|
|
{
|
|
if (NULL == (shWinTrustDllInst = LoadLibraryFromSystemDir(WINTRUST)))
|
|
{
|
|
LOG_Error(_T("Failed to load libary %s, exit function."), WINTRUST);
|
|
hr = HRESULT_FROM_WIN32(GetLastError());
|
|
goto Done;
|
|
}
|
|
}
|
|
|
|
//
|
|
// dynamically load the crypt32.dll, which will be used by the two
|
|
// helper functions to verify the cert is MS cert
|
|
//
|
|
if (NULL == shCrypt32DllInst)
|
|
{
|
|
if (NULL == (shCrypt32DllInst = LoadLibraryFromSystemDir(CRYPT32)))
|
|
{
|
|
LOG_Error(_T("Failed to load libary %s, exit function."), CRYPT32);
|
|
hr = HRESULT_FROM_WIN32(GetLastError());
|
|
goto Done;
|
|
}
|
|
}
|
|
//
|
|
// find the functions we need
|
|
//
|
|
if (NULL == (pfnWinVerifyTrust = (PFNWinVerifyTrust)
|
|
GetProcAddress(shWinTrustDllInst, "WinVerifyTrust")) ||
|
|
NULL == (pfnWTHelperProvDataFromStateData = (PFNWTHelperProvDataFromStateData)
|
|
GetProcAddress(shWinTrustDllInst, "WTHelperProvDataFromStateData")) ||
|
|
NULL == (pfnWTHelperGetProvSignerFromChain = (PFNWTHelperGetProvSignerFromChain)
|
|
GetProcAddress(shWinTrustDllInst, "WTHelperGetProvSignerFromChain")) ||
|
|
NULL == (pfnWTHelperGetProvCertFromChain = (PFNWTHelperGetProvCertFromChain)
|
|
GetProcAddress(shWinTrustDllInst, "WTHelperGetProvCertFromChain")))
|
|
{
|
|
//
|
|
// at least one function was not found in the loaded cryp32.dll libary.
|
|
// we can not continue, jsut quit.
|
|
// NOTE: this shouldn't happen since we have tried to get
|
|
// the least common denomination of different version of this dll
|
|
// on both IE4 and IE5
|
|
//
|
|
LOG_Error(_T("CheckWinTrust() did not find functions needed from %s"), CRYPT32);
|
|
hr = HRESULT_FROM_WIN32(ERROR_INVALID_FUNCTION);
|
|
goto Done;
|
|
}
|
|
|
|
|
|
//
|
|
// initialize the data structure used to verify trust
|
|
//
|
|
winFile.cbStruct = sizeof(WINTRUST_FILE_INFO);
|
|
winFile.hFile = INVALID_HANDLE_VALUE;
|
|
winFile.pcwszFilePath = T2COLE(pszFileName);
|
|
winFile.pgKnownSubject = NULL;
|
|
|
|
winData.cbStruct = sizeof(WINTRUST_DATA);
|
|
winData.pPolicyCallbackData = NULL;
|
|
winData.pSIPClientData = NULL;
|
|
winData.dwUIChoice = (WTD_UI_ALL == dwUIChoice) ? dwUIChoice : WTD_UI_NONE;
|
|
winData.fdwRevocationChecks = WTD_REVOKE_NONE;
|
|
winData.dwUnionChoice = WTD_CHOICE_FILE;
|
|
winData.dwStateAction = WTD_STATEACTION_VERIFY;
|
|
winData.hWVTStateData = 0;
|
|
winData.dwProvFlags = WTD_REVOCATION_CHECK_NONE;
|
|
winData.pFile = &winFile;
|
|
|
|
if (dwCheckRevocation == WTD_REVOKE_WHOLECHAIN)
|
|
{
|
|
winData.fdwRevocationChecks = WTD_REVOKE_WHOLECHAIN;
|
|
winData.dwProvFlags = WTD_REVOCATION_CHECK_CHAIN;
|
|
}
|
|
|
|
//
|
|
// verify the signature
|
|
//
|
|
hr = pfnWinVerifyTrust( (HWND)0, &gAction, &winData);
|
|
|
|
//
|
|
// Ignore errors when retrieving Cert Revocation List (CRL). This
|
|
// just means the list itself couldn't be retrieved, not that the
|
|
// current cert was invalid or revoked. (KenSh, 2002/01/17)
|
|
//
|
|
if (hr == CERT_E_REVOCATION_FAILURE)
|
|
{
|
|
hr = S_OK;
|
|
}
|
|
|
|
if (FAILED(hr))
|
|
{
|
|
//
|
|
// The object isn't even trusted so just get out here
|
|
//
|
|
LOG_Error(_T("When processing %s found error 0x%0x."), pszFileName, hr);
|
|
goto Return;
|
|
}
|
|
|
|
|
|
//
|
|
// the real usage should never pass in WTD_UI_ALL. If this is the case,
|
|
// then we are calling this recursively in order to force the show
|
|
// a good but non-MS cert only, so no need to check MS cert again.
|
|
//
|
|
// or, in test mode, we always do this part
|
|
//
|
|
if (WTD_UI_ALL != dwUIChoice)
|
|
{
|
|
//
|
|
// if come to here, it means all above verified okay.
|
|
//
|
|
// the rset of code is used to verify the signed cert is
|
|
// a known cert.
|
|
//
|
|
|
|
hr = S_FALSE;
|
|
|
|
pProvData = pfnWTHelperProvDataFromStateData(winData.hWVTStateData);
|
|
|
|
pProvSigner = pfnWTHelperGetProvSignerFromChain(
|
|
(PCRYPT_PROVIDER_DATA) pProvData,
|
|
0, // first signer
|
|
FALSE, // not a counter signer
|
|
0);
|
|
|
|
//
|
|
// check root cert then check leaf (signing) cert if that fails
|
|
//
|
|
// 0 is signing cert, csCertChain-1 is root cert
|
|
//
|
|
|
|
|
|
if (NULL == pCertsData)
|
|
{
|
|
//
|
|
// if caller does not specify a hash value, then it means we want
|
|
// to verify if this cert is known MS cert. We will first
|
|
// try to find out if it is signed with a cert that has MS as root.
|
|
//
|
|
pProvCert = pfnWTHelperGetProvCertFromChain(pProvSigner, pProvSigner->csCertChain - 1);
|
|
hr = VerifyMSRoot(shCrypt32DllInst, pProvCert->pCert);
|
|
}
|
|
|
|
if (S_OK != hr)
|
|
{
|
|
pProvCert = pfnWTHelperGetProvCertFromChain(pProvSigner, 0);
|
|
|
|
hr = VerifyKnownCerts(shCrypt32DllInst, pProvCert->pCert, pCertsData);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
Return:
|
|
|
|
//
|
|
// free the wintrust state that was used to get the cert in the chain
|
|
//
|
|
winData.dwStateAction = WTD_STATEACTION_CLOSE;
|
|
pfnWinVerifyTrust( (HWND)0, &gAction, &winData);
|
|
|
|
//
|
|
// recursively call this function if not in test mode so we can show
|
|
// UI for this non-MS but good cert.
|
|
// Only the two functions checking MS cert will return S_FALSE
|
|
//
|
|
if (S_OK != hr)
|
|
{
|
|
if (WTD_UI_NOGOOD == dwUIChoice)
|
|
{
|
|
//
|
|
// we need to show UI, so we will have to call this thing again
|
|
// in case this is not a MS cert. From UI, if user clicks YES
|
|
// then the return value will be S_OK;
|
|
//
|
|
hr = CheckWinTrust(pszFileName, NULL, WTD_UI_ALL, dwCheckRevocation);
|
|
LOG_Error(_T("CheckWinTrust() found file not signed by a known MS cert. If user has not checked \"Always trust this\", UI should be shown, and user selected %s"),
|
|
SUCCEEDED(hr) ? _T("YES") : _T("NO"));
|
|
}
|
|
else
|
|
{
|
|
LOG_Error(_T("CheckWinTrust() found file not signed by a known cert!"));
|
|
#if defined(UNICODE) || defined(_UNICODE)
|
|
LogError(hr, "Digital Signatures on file %ls are not trusted", pszFileName);
|
|
#else
|
|
LogError(hr, "Digital Signatures on file %s are not trusted", pszFileName);
|
|
#endif
|
|
hr = TRUST_E_SUBJECT_NOT_TRUSTED;
|
|
}
|
|
}
|
|
|
|
if (WTD_UI_ALL != dwUIChoice)
|
|
{
|
|
if (FAILED(hr))
|
|
{
|
|
LOG_ErrorMsg(hr);
|
|
#if defined(UNICODE) || defined(_UNICODE)
|
|
LogError(hr, "Digital Signatures on file %ls are not trusted", pszFileName);
|
|
#else
|
|
LogError(hr, "Digital Signatures on file %s are not trusted", pszFileName);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
LOG_Trust(_T("CheckWinTrust(%s) returns S_OK"), pszFileName);
|
|
}
|
|
}
|
|
|
|
Done:
|
|
if (NULL != shWinTrustDllInst)
|
|
{
|
|
FreeLibrary(shWinTrustDllInst);
|
|
shWinTrustDllInst = NULL;
|
|
}
|
|
if (NULL != shCrypt32DllInst)
|
|
{
|
|
FreeLibrary(shCrypt32DllInst);
|
|
shCrypt32DllInst = NULL;
|
|
}
|
|
|
|
return (hr);
|
|
}
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Public Function VerifyFileTrust()
|
|
//
|
|
// This is a wrapper function for CheckWinTrust that both Whistler
|
|
// and WU classic code should use.
|
|
//
|
|
// Input: szFileName - the file with complete path
|
|
// pbSha1HashVal - hash value of a known good cert
|
|
// fShowBadUI - whether pop up UI in cases
|
|
// (1) inproperly signed signature,
|
|
// (2) properly signed but not signed by a known cert
|
|
//
|
|
// Return: HRESULT - S_OK the file is signed with a valid known cert
|
|
// or error code.
|
|
//
|
|
// Note: If _WUV3TEST flag is set (for test build), then fShowBadUI is
|
|
// ignored:
|
|
// if reg key SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\wuv3test\WinTrustUI
|
|
// is set to 1, then no UI is shown, and this function always return S_OK;
|
|
// otherwise, UI always show no matter what cert, and return value is same
|
|
// as the live build.
|
|
//
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
HRESULT VerifyFileTrust(
|
|
IN LPCTSTR szFileName,
|
|
IN pCERT_HASH_ARRAY pCertsData,
|
|
BOOL fShowBadUI,
|
|
BOOL fCheckRevocation /*=FALSE*/
|
|
)
|
|
{
|
|
DWORD dwUIChoice = fShowBadUI ? WTD_UI_NOGOOD : WTD_UI_NONE;
|
|
DWORD dwCheckRevocation = fCheckRevocation ? WTD_REVOKE_WHOLECHAIN : WTD_REVOKE_NONE;
|
|
|
|
return CheckWinTrust(szFileName, pCertsData, dwUIChoice, dwCheckRevocation);
|
|
}
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Public Function ReadWUPolicyShowTrustUI()
|
|
//
|
|
// Input: void
|
|
//
|
|
// Return: BOOL - FALSE means ShowTrustUI regkey is not present, or is set to 0
|
|
// TRUE means ShowTrustUI regkey is present and is set to 1
|
|
//
|
|
//
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
BOOL ReadWUPolicyShowTrustUI()
|
|
{
|
|
#if !defined(DISABLE_IU_POLICY)
|
|
LOG_Block("ReadWUPolicyShowTrustUI()");
|
|
HKEY hkey;
|
|
DWORD dwShowTrustUI = 0; // if the key is not present, default to not showing any UI
|
|
DWORD dwSize = sizeof(dwShowTrustUI);
|
|
|
|
if (NO_ERROR == RegOpenKeyEx(HKEY_LOCAL_MACHINE, REGKEY_IUCTL, 0, KEY_READ, &hkey))
|
|
{
|
|
if (ERROR_SUCCESS == RegQueryValueEx(hkey, _T("WUPolicyShowTrustUI"), 0, 0, (LPBYTE)&dwShowTrustUI, &dwSize))
|
|
{
|
|
LOG_Trust(_T("Found regval %s\\WUPolicyShowTrustUI=%x"), REGKEY_IUCTL, dwShowTrustUI);
|
|
}
|
|
RegCloseKey(hkey);
|
|
}
|
|
|
|
return (1 == dwShowTrustUI);
|
|
#else
|
|
//
|
|
// for released build, we never show up UI
|
|
//
|
|
return FALSE;
|
|
#endif
|
|
}
|