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2577 lines
88 KiB
2577 lines
88 KiB
/*++
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Copyright (c) 1999-2000 Microsoft Corporation
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Module Name:
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SafeIden.c (WinSAFER SaferIdentifyLevel)
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Abstract:
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This module implements the WinSAFER APIs that evaluate the system
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policies to determine which Authorization Level has been configured
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to apply restrictions for a specified application or code library.
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Author:
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Jeffrey Lawson (JLawson) - Nov 1999
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Environment:
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User mode only.
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Exported Functions:
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SaferiSearchMatchingHashRules (privately exported)
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SaferIdentifyLevel
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Revision History:
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Created - Nov 1999
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--*/
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#include "pch.h"
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#pragma hdrstop
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#include <md5.h>
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#include <wchar.h> //for swprintf
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#pragma warning(push, 3)
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#include <wintrust.h> // WinVerifyTrust
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#include <softpub.h> // WINTRUST_ACTION_GENERIC_VERIFY_V2
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#pragma warning(pop)
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#include <winsafer.h>
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#include <winsaferp.h>
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#include "saferp.h"
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#define EXPAND_REGPATH
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//#define VERBOSE_IDENTIFICATIONS
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#ifdef VERBOSE_IDENTIFICATIONS
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#define OUTPUTDEBUGSTRING(v) OutputDebugStringW(v)
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#else
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#define OUTPUTDEBUGSTRING(v)
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#endif
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const static GUID guidTrustedCert = SAFER_GUID_RESULT_TRUSTED_CERT;
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const static GUID guidDefaultRule = SAFER_GUID_RESULT_DEFAULT_LEVEL;
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NTSTATUS NTAPI
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__CodeAuthzpEnsureMapped(
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IN OUT PLOCALIDENTITYCONTEXT pIdentContext
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)
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/*++
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Routine Description:
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Evaluates the supplied identification context structure and
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attempts to gain access to a mapped memory region of the entity
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being identified. It does the following steps:
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1) if the identification context already has a non-NULL memory
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pointer then returns successfully.
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2) if the identification context has a non-NULL file handle
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then that handle is memory mapped into memory and
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returns successfully.
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3) if the identification context has a non-NULL image filename
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then that filename is opened for read access and memory
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mapped into memory.
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Otherwise the function call is not successful.
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The caller must be sure to call CodeAuthzpEnsureUnmapped later.
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Arguments:
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pIdentContext = pointer to the identification context structure.
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After this function call succeeds, the caller can assume
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that pIdentContext->pImageMemory and pIdentContext->ImageSize
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are valid and can be used.
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Return Value:
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Returns STATUS_SUCCESS if a memory-mapped image pointer and size
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are now available, otherwise a failure occurred trying to map them.
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--*/
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{
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HANDLE hMapping;
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ASSERT(ARGUMENT_PRESENT(pIdentContext) &&
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pIdentContext->CodeProps != NULL);
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if (pIdentContext->pImageMemory == NULL ||
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pIdentContext->ImageSize.QuadPart == 0)
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{
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//
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// If a memory pointer and imagesize were supplied to us
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// in the CodeProperties, then just use them directly.
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//
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if (pIdentContext->CodeProps->ImageSize.QuadPart != 0 &&
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pIdentContext->CodeProps->pByteBlock != NULL)
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{
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pIdentContext->pImageMemory =
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pIdentContext->CodeProps->pByteBlock;
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pIdentContext->ImageSize.QuadPart =
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pIdentContext->CodeProps->ImageSize.QuadPart;
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pIdentContext->bImageMemoryNeedUnmap = FALSE;
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return STATUS_SUCCESS;
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}
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//
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// Ensure that we have an open file handle, by using the
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// handle supplied to us in the CodeProperties if possible,
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// otherwise by opening the supplied ImagePath.
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//
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if (pIdentContext->hFileHandle == NULL) {
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// no file handle supplied.
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return STATUS_UNSUCCESSFUL; // failed.
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}
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//
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// Get the size of the file. We assume that if we had to
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// open the file ourself that the ImageSize cannot be used.
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//
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if (!GetFileSizeEx(pIdentContext->hFileHandle,
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&pIdentContext->ImageSize)) {
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return STATUS_UNSUCCESSFUL; // failure
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}
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if (pIdentContext->ImageSize.HighPart != 0) {
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//BLACKCOMB TODO: maybe later handle very large files.
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return STATUS_NO_MEMORY; // failure--too large.
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}
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if (pIdentContext->ImageSize.QuadPart == 0) {
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return STATUS_UNSUCCESSFUL; // failure--zero file size.
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}
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//
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// Now that we have an open file handle, open it up
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// as a memory-mapped file mapping.
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//
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hMapping = CreateFileMapping(
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pIdentContext->hFileHandle,
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NULL,
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PAGE_READONLY,
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(DWORD) 0, // highword zero
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(DWORD) pIdentContext->ImageSize.LowPart,
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NULL);
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if (hMapping == NULL || hMapping == INVALID_HANDLE_VALUE) {
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return STATUS_UNSUCCESSFUL;
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}
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//
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// View map the file into memory.
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//
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pIdentContext->pImageMemory =
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MapViewOfFile(hMapping, FILE_MAP_READ, 0, 0,
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pIdentContext->ImageSize.LowPart);
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CloseHandle(hMapping);
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if (pIdentContext->pImageMemory == NULL) {
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return STATUS_UNSUCCESSFUL;
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}
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pIdentContext->bImageMemoryNeedUnmap = TRUE;
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS NTAPI
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__CodeAuthzpEnsureUnmapped(
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IN OUT PLOCALIDENTITYCONTEXT pIdentContext
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)
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/*++
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Routine Description:
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Reverses the effects of __CodeAuthzEnsureMapped and closes and
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frees any handles that were opened to the specified file.
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Arguments:
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pIdentContext - pointer to the context structure.
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Return Value:
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Returns STATUS_SUCCESS if no errors occurred.
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--*/
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{
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ASSERT(pIdentContext != NULL);
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if (pIdentContext->bImageMemoryNeedUnmap &&
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pIdentContext->pImageMemory != NULL)
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{
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UnmapViewOfFile((LPCVOID) pIdentContext->pImageMemory);
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pIdentContext->pImageMemory = NULL;
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pIdentContext->bImageMemoryNeedUnmap = FALSE;
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS NTAPI
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CodeAuthzpComputeImageHash(
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IN PVOID pImageMemory,
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IN DWORD dwImageSize,
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OUT PBYTE pComputedHash OPTIONAL,
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IN OUT PDWORD pdwHashSize OPTIONAL,
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OUT ALG_ID *pHashAlgorithm OPTIONAL
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)
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/*++
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Routine Description:
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Computes an MD5 image hash of a specified region of memory.
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Note, MD5 hashes are always 16 bytes in length.
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Arguments:
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pImageMemory - Pointer to a memory buffer to compute the hash of.
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dwImageSize - Total size of the pImageMemory buffer in bytes.
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pComputedHash - Pointer that receives the computed hash.
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pdwHashSize - Pointer to a DWORD value. On input, this DWORD should
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specify the maximum size of the pComputedHash buffer.
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On successful execution of this function, the length of the
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resulting hash is written to this pointer.
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pHashAlgorithm - pointer to a variable that will receive the hash
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algorithm that was used to compute the hash. This will
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always be the constant CALG_MD5.
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Return Value:
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Returns STATUS_SUCCESS on successful execution.
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--*/
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{
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MD5_CTX md5ctx;
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//
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// Check the validity of the arguments supplied to us.
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//
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if (!ARGUMENT_PRESENT(pImageMemory) ||
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dwImageSize == 0) {
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return STATUS_INVALID_PARAMETER;
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}
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if (!ARGUMENT_PRESENT(pComputedHash) ||
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!ARGUMENT_PRESENT(pdwHashSize) ||
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*pdwHashSize < 16) {
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return STATUS_BUFFER_TOO_SMALL;
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}
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//
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// Compute the MD5 hash of it.
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// (this could also be done with CryptCreateHash+CryptHashData)
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//
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MD5Init(&md5ctx);
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MD5Update(&md5ctx, (LPBYTE) pImageMemory, dwImageSize);
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MD5Final(&md5ctx);
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//
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// Copy the hash to the user's buffer.
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//
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RtlCopyMemory(pComputedHash, &md5ctx.digest[0], 16);
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*pdwHashSize = 16;
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if (ARGUMENT_PRESENT(pHashAlgorithm)) {
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*pHashAlgorithm = CALG_MD5;
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS NTAPI
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__CodeAuthzpCheckIdentityPathRules(
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IN OUT PLOCALIDENTITYCONTEXT pIdentStruct,
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OUT PAUTHZLEVELTABLERECORD *pFoundLevel,
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OUT PBOOL pbExactMatch,
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OUT PAUTHZIDENTSTABLERECORD *pFoundIdentity
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)
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/*++
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Routine Description:
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Evaluates a wildcard pattern against a specified pathname and
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indicates if they match.
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Arguments:
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pIdentStruct -
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pFoundLevel - receives a pointer to the authorization Level record
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indicated by the best matching rule.
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pbExactMatch - receives a boolean value indicating if the match
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was against an exact fully qualified path rule.
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pFoundIdentity - receives a pointer to the identifier entry rule
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that best matched.
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Return Value:
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Returns STATUS_SUCCESS if a WinSafer Level has been found,
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or STATUS_NOT_FOUND if not. Otherwise an error code.
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--*/
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{
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NTSTATUS Status;
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PVOID RestartKey;
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UNICODE_STRING UnicodePath;
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WCHAR ExpandedPath[MAX_PATH];
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WCHAR szLongPath[MAX_PATH];
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PAUTHZIDENTSTABLERECORD pAuthzIdentRecord, pBestIdentRecord;
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PAUTHZLEVELTABLERECORD pAuthzLevelRecord;
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LPWSTR lpKeyname = NULL;
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LONG lBestLevelDepth;
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DWORD dwBestLevelId;
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BOOLEAN bFirstPass;
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LONG bPathIdentIsBadType = -1; // represents uninit'd state
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//
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// Verify that our input arguments all make sense.
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//
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if (!ARGUMENT_PRESENT(pIdentStruct) ||
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pIdentStruct->CodeProps == NULL ||
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!ARGUMENT_PRESENT(pFoundLevel) ||
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!ARGUMENT_PRESENT(pbExactMatch))
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{
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Status = STATUS_INVALID_PARAMETER;
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goto ExitHandler;
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}
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if ((pIdentStruct->dwCheckFlags & SAFER_CRITERIA_IMAGEPATH) == 0 ||
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pIdentStruct->UnicodeFullyQualfiedLongFileName.Buffer == NULL ||
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RtlIsGenericTableEmpty(&g_CodeIdentitiesTable))
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{
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// We're not supposed to evaluate image paths.
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Status = STATUS_NOT_FOUND;
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goto ExitHandler;
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}
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ASSERT(g_TableCritSec.OwningThread == UlongToHandle(GetCurrentThreadId()));
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//
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// Enumerate through all path subkey GUIDs.
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//
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bFirstPass = TRUE;
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RestartKey = NULL;
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for (pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
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RtlEnumerateGenericTableWithoutSplaying(
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&g_CodeIdentitiesTable, &RestartKey);
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pAuthzIdentRecord != NULL;
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pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
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RtlEnumerateGenericTableWithoutSplaying(
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&g_CodeIdentitiesTable, &RestartKey)
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)
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{
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if (pAuthzIdentRecord->dwIdentityType ==
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SaferIdentityTypeImageName)
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{//begin reg key lookup block
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LONG lMatchDepth;
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//
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// Explicitly expand environmental variables.
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//
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if (pAuthzIdentRecord->ImageNameInfo.bExpandVars) {
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#ifdef EXPAND_REGPATH
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//This code attempts to expand "path" entries that are really reg keys.
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//For example, some paths are install dependent. These paths are commonly written into
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//the registry. You can specify a regkey that is a path.
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//For example see the following regkeys:
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//HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
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//HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
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//HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security\OutlookSecureTempFolder
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{
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LPWSTR lpzRegKey = pAuthzIdentRecord->ImageNameInfo.ImagePath.Buffer;
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HKEY hKey=NULL, hKeyHive=NULL;
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BOOL bIsCurrentUser = FALSE;
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|
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//leading percent does two things:
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//1. The rules created will be the Expandable String Type (REG_EXPAND_SZ)
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//2. Reduces the chance of a real path name conflict.
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LPCWSTR LP_CU_HIVE = L"%HKEY_CURRENT_USER";
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LPCWSTR LP_LM_HIVE = L"%HKEY_LOCAL_MACHINE";
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|
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BYTE buffer[MAX_PATH *2 + 80];
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LPWSTR lpValue=NULL;
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DWORD dwBufferSize = sizeof(buffer);
|
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LPWSTR lpHivename;
|
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LPWSTR lpLastPercentSign;
|
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LONG retval;
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BOOL bIsRegKey=TRUE;
|
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DWORD dwKeyLength;
|
|
|
|
//We expect a string like the following:
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//%HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security\OutlookSecureTempFolder%
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//We need to break it into three parts for the registry query:
|
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//1. The hive: HKEY_CURRENT_USER
|
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//2. The key name: Software\Microsoft\Office\9.0\Outlook\Security
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//3. The value name: OutlookSecureTempFolder
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lpKeyname=NULL;
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lpValue=NULL;
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lpHivename=NULL;
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lpLastPercentSign=NULL;
|
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memset(buffer, 0, dwBufferSize);
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lpHivename = wcsstr(lpzRegKey, LP_CU_HIVE);
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OUTPUTDEBUGSTRING(L"\n");
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OUTPUTDEBUGSTRING(L"$");
|
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OUTPUTDEBUGSTRING(lpzRegKey);
|
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OUTPUTDEBUGSTRING(L"\n");
|
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lpLastPercentSign = wcsrchr(lpzRegKey, '%');
|
|
//if (lpLastPercentSign != &lpzRegKey[wcslen(lpzRegKey) - 1]) { //needs to end in a '%' as well
|
|
|
|
//
|
|
// we allow %key+valuename%OLK* type paths now
|
|
// but there still has to be a matching %
|
|
//
|
|
|
|
if (!lpLastPercentSign) {
|
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bIsRegKey = FALSE;
|
|
}
|
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if (bIsRegKey) {
|
|
if (lpHivename != NULL) {
|
|
hKeyHive = HKEY_CURRENT_USER;
|
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bIsCurrentUser = TRUE;
|
|
dwKeyLength = (wcslen(&lpzRegKey[wcslen(LP_CU_HIVE)+1]) +1) * sizeof (WCHAR);
|
|
lpKeyname = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY, dwKeyLength);
|
|
if ( lpKeyname == NULL ) {
|
|
Status = STATUS_NO_MEMORY;
|
|
goto ForLoopCleanup;
|
|
}
|
|
wcscpy(lpKeyname, &lpzRegKey[wcslen(LP_CU_HIVE)+1] );
|
|
OUTPUTDEBUGSTRING(L"HKEY_CURRENT_USER");
|
|
OUTPUTDEBUGSTRING(L"\n");
|
|
} else {
|
|
lpHivename = wcsstr(lpzRegKey, LP_LM_HIVE);
|
|
if (lpHivename != NULL) {
|
|
hKeyHive = HKEY_LOCAL_MACHINE;
|
|
dwKeyLength = (wcslen(&lpzRegKey[wcslen(LP_LM_HIVE)+1]) +1) * sizeof (WCHAR);
|
|
lpKeyname = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY, dwKeyLength);
|
|
if ( lpKeyname == NULL ) {
|
|
Status = STATUS_NO_MEMORY;
|
|
goto ForLoopCleanup;
|
|
}
|
|
wcscpy(lpKeyname, &lpzRegKey[wcslen(LP_LM_HIVE)+1] );
|
|
OUTPUTDEBUGSTRING(L"HKEY_LOCAL_MACHINE");
|
|
OUTPUTDEBUGSTRING(L"\n");
|
|
} else {
|
|
//The string is either a path or bogus data
|
|
bIsRegKey = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (bIsRegKey) {
|
|
lpValue = wcsrchr(lpKeyname, '\\');
|
|
if (lpValue==NULL) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ForLoopCleanup;
|
|
}
|
|
//Take the regkey and value and stick a null terminator in between them.
|
|
*lpValue = '\0';
|
|
lpValue++;
|
|
//lpValue[wcslen(lpValue)-1] = '\0';
|
|
//lpLastPercentSign[0] = L'\0'; //replace the final '%' char with a null terminator
|
|
lpLastPercentSign = wcsrchr(lpValue, '%');
|
|
if (lpLastPercentSign == NULL) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ForLoopCleanup;
|
|
}
|
|
*lpLastPercentSign = '\0';
|
|
|
|
//
|
|
// Bug# 416461 - causes handle leak so use a different API
|
|
// for the user hive
|
|
//
|
|
|
|
if ( bIsCurrentUser ) {
|
|
if (retval = RegOpenCurrentUser( KEY_READ, &hKeyHive ) ) {
|
|
if ( retval == ERROR_FILE_NOT_FOUND ||
|
|
retval == ERROR_NOT_FOUND ||
|
|
retval == ERROR_PATH_NOT_FOUND) {
|
|
|
|
if (lpKeyname) {
|
|
HeapFree(GetProcessHeap(), 0,lpKeyname);
|
|
lpKeyname = NULL;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ForLoopCleanup;
|
|
}
|
|
}
|
|
|
|
retval = RegOpenKeyEx(hKeyHive,
|
|
lpKeyname,
|
|
0,
|
|
KEY_READ,
|
|
&hKey);
|
|
|
|
if ( bIsCurrentUser ) {
|
|
RegCloseKey(hKeyHive);
|
|
}
|
|
|
|
if (retval)
|
|
{
|
|
if ( retval == ERROR_FILE_NOT_FOUND ||
|
|
retval == ERROR_NOT_FOUND ||
|
|
retval == ERROR_PATH_NOT_FOUND) {
|
|
|
|
if (lpKeyname) {
|
|
HeapFree(GetProcessHeap(), 0,lpKeyname);
|
|
lpKeyname = NULL;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ForLoopCleanup;
|
|
} else {
|
|
OUTPUTDEBUGSTRING(lpKeyname);
|
|
OUTPUTDEBUGSTRING(L"\n");
|
|
OUTPUTDEBUGSTRING(lpValue);
|
|
OUTPUTDEBUGSTRING(L"\n");
|
|
|
|
if (retval = RegQueryValueEx(hKey,
|
|
lpValue,
|
|
NULL,
|
|
NULL,
|
|
buffer,
|
|
&dwBufferSize))
|
|
{
|
|
RegCloseKey(hKey);
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ForLoopCleanup;
|
|
} else {
|
|
#ifdef VERBOSE_IDENTIFICATIONS
|
|
UNICODE_STRING UnicodeDebug;
|
|
WCHAR DebugBuffer[MAX_PATH*2 + 80];
|
|
#endif
|
|
UNICODE_STRING NewPath;
|
|
PUNICODE_STRING pPathFromRule;
|
|
|
|
//
|
|
// if it exists, concatenate the filename after
|
|
// i.e. the OLK in %HKEY\somekey\somevalue%OLK
|
|
//
|
|
|
|
if (lpLastPercentSign[1] != L'\0') {
|
|
|
|
//
|
|
// there is some stuff after %HKEY\somekey\somevalue%
|
|
//
|
|
|
|
if (sizeof(buffer) >
|
|
((wcslen((WCHAR*)buffer) + wcslen(lpLastPercentSign+1))* sizeof(WCHAR))) {
|
|
|
|
WCHAR *pwcBuffer = (WCHAR *)buffer;
|
|
if (pwcBuffer[0] != L'\0' &&
|
|
pwcBuffer[wcslen(pwcBuffer)-1] != L'\\') {
|
|
wcscat((WCHAR*)buffer, L"\\");
|
|
}
|
|
wcscat((WCHAR*)buffer, lpLastPercentSign+1);
|
|
|
|
}
|
|
}
|
|
|
|
pPathFromRule=&(pAuthzIdentRecord->ImageNameInfo.ImagePath);
|
|
NewPath.Length = (USHORT)wcslen((WCHAR*)buffer) * sizeof(WCHAR);
|
|
NewPath.MaximumLength = (USHORT)wcslen((WCHAR*)buffer) * sizeof(WCHAR);
|
|
NewPath.Buffer = (PWCHAR)buffer;
|
|
|
|
|
|
#ifdef VERBOSE_IDENTIFICATIONS
|
|
RtlInitEmptyUnicodeString(&UnicodeDebug, DebugBuffer, sizeof(DebugBuffer));
|
|
swprintf(UnicodeDebug.Buffer, L"pPathFromRule(L,ML,Buffer)=(%d,%d,%s)\n",
|
|
pPathFromRule->Length,
|
|
pPathFromRule->MaximumLength,
|
|
pPathFromRule->Buffer);
|
|
OUTPUTDEBUGSTRING(UnicodeDebug.Buffer);
|
|
|
|
memset(DebugBuffer, '0', sizeof(DebugBuffer));
|
|
swprintf(UnicodeDebug.Buffer, L"NewPath(L,ML,Buffer)=(%d,%d,%s)\n",
|
|
NewPath.Length,
|
|
NewPath.MaximumLength,
|
|
NewPath.Buffer);
|
|
OUTPUTDEBUGSTRING(UnicodeDebug.Buffer);
|
|
#endif
|
|
|
|
|
|
//The new path may be bigger than the current UNICODE_STRING can store. Reallocate if necessary.
|
|
if (pPathFromRule->MaximumLength >=
|
|
NewPath.Length + sizeof(UNICODE_NULL)) {
|
|
RtlCopyUnicodeString(
|
|
pPathFromRule,
|
|
&NewPath);
|
|
} else {
|
|
UNICODE_STRING UnicodeExpandedCopy;
|
|
|
|
Status = RtlDuplicateUnicodeString(
|
|
RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
|
|
RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING,
|
|
&NewPath,
|
|
&UnicodeExpandedCopy);
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
RtlFreeUnicodeString(&pAuthzIdentRecord->ImageNameInfo.ImagePath);
|
|
pAuthzIdentRecord->ImageNameInfo.ImagePath = UnicodeExpandedCopy;
|
|
}
|
|
}
|
|
|
|
#ifdef VERBOSE_IDENTIFICATIONS
|
|
memset(DebugBuffer, '0', sizeof(DebugBuffer));
|
|
swprintf(UnicodeDebug.Buffer, L"pPathFromRule after copy(L,ML,Buffer)=(%d,%d,%s)\n",
|
|
pPathFromRule->Length,
|
|
pPathFromRule->MaximumLength,
|
|
pPathFromRule->Buffer);
|
|
OUTPUTDEBUGSTRING(UnicodeDebug.Buffer);
|
|
#endif
|
|
}
|
|
|
|
}
|
|
RegCloseKey(hKey);
|
|
}
|
|
if (lpKeyname) {
|
|
HeapFree(GetProcessHeap(), 0,lpKeyname);
|
|
lpKeyname = NULL;
|
|
}
|
|
|
|
} //end reg key lookup block
|
|
|
|
#endif
|
|
|
|
// Attempt to expand now.
|
|
RtlInitEmptyUnicodeString(
|
|
&UnicodePath,
|
|
&ExpandedPath[0],
|
|
sizeof(ExpandedPath) );
|
|
|
|
Status = RtlExpandEnvironmentStrings_U(
|
|
NULL, // environment
|
|
&pAuthzIdentRecord->ImageNameInfo.ImagePath, // unexpanded path
|
|
&UnicodePath, // resulting path
|
|
NULL); // needed buffer size.
|
|
if (!NT_SUCCESS(Status)) {
|
|
// Failed to expand environment strings.
|
|
continue;
|
|
}
|
|
|
|
|
|
// Perf optimization: If the expansion was successful,
|
|
// update the table to keep the expanded version, eliminating
|
|
// the need to expand the string for any future comparisons.
|
|
if (pAuthzIdentRecord->ImageNameInfo.ImagePath.MaximumLength >=
|
|
UnicodePath.Length + sizeof(UNICODE_NULL)) {
|
|
RtlCopyUnicodeString(
|
|
&pAuthzIdentRecord->ImageNameInfo.ImagePath,
|
|
&UnicodePath);
|
|
pAuthzIdentRecord->ImageNameInfo.bExpandVars = FALSE;
|
|
} else {
|
|
UNICODE_STRING UnicodeExpandedCopy;
|
|
|
|
Status = RtlDuplicateUnicodeString(
|
|
RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
|
|
RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING,
|
|
&UnicodePath,
|
|
&UnicodeExpandedCopy);
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
RtlFreeUnicodeString(
|
|
&pAuthzIdentRecord->ImageNameInfo.ImagePath);
|
|
pAuthzIdentRecord->ImageNameInfo.ImagePath =
|
|
UnicodeExpandedCopy;
|
|
pAuthzIdentRecord->ImageNameInfo.bExpandVars = FALSE;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
UnicodePath.Buffer = pAuthzIdentRecord->ImageNameInfo.ImagePath.Buffer;
|
|
UnicodePath.Length = pAuthzIdentRecord->ImageNameInfo.ImagePath.Length;
|
|
UnicodePath.MaximumLength = pAuthzIdentRecord->ImageNameInfo.ImagePath.MaximumLength;
|
|
}
|
|
|
|
|
|
//
|
|
// Attempt short -> long filename expansion (if there is a need)
|
|
//
|
|
|
|
szLongPath[0] = L'\0';
|
|
|
|
//
|
|
// unicode buffer is guaranteed to be < MAX_PATH
|
|
//
|
|
|
|
wcsncpy(szLongPath,
|
|
pAuthzIdentRecord->ImageNameInfo.ImagePath.Buffer,
|
|
pAuthzIdentRecord->ImageNameInfo.ImagePath.Length/sizeof(WCHAR));
|
|
|
|
szLongPath[pAuthzIdentRecord->ImageNameInfo.ImagePath.Length/sizeof(WCHAR)] = L'\0';
|
|
|
|
if ( wcschr(szLongPath, L'~') ) {
|
|
|
|
if (!GetLongPathNameW(szLongPath,
|
|
szLongPath,
|
|
sizeof(szLongPath) / sizeof(WCHAR))) {
|
|
|
|
Status = STATUS_VARIABLE_NOT_FOUND;
|
|
continue;
|
|
}
|
|
|
|
RtlInitUnicodeString(&UnicodePath, szLongPath);
|
|
|
|
if (pAuthzIdentRecord->ImageNameInfo.ImagePath.MaximumLength >=
|
|
UnicodePath.Length + sizeof(UNICODE_NULL)) {
|
|
RtlCopyUnicodeString(
|
|
&pAuthzIdentRecord->ImageNameInfo.ImagePath,
|
|
&UnicodePath);
|
|
} else {
|
|
UNICODE_STRING UnicodeExpandedCopy;
|
|
|
|
Status = RtlDuplicateUnicodeString(
|
|
RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
|
|
RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING,
|
|
&UnicodePath,
|
|
&UnicodeExpandedCopy);
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
RtlFreeUnicodeString(
|
|
&pAuthzIdentRecord->ImageNameInfo.ImagePath);
|
|
pAuthzIdentRecord->ImageNameInfo.ImagePath =
|
|
UnicodeExpandedCopy;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Compute the quality of which the wildcard path identity
|
|
// matches the ImagePath property we were asked to evaluate.
|
|
//
|
|
ASSERT(UnicodePath.Buffer[UnicodePath.Length / sizeof(WCHAR)] == UNICODE_NULL);
|
|
ASSERT(pIdentStruct->UnicodeFullyQualfiedLongFileName.Buffer[
|
|
pIdentStruct->UnicodeFullyQualfiedLongFileName.Length / sizeof(WCHAR)] == UNICODE_NULL);
|
|
lMatchDepth = CodeAuthzpCompareImagePath(UnicodePath.Buffer,
|
|
pIdentStruct->UnicodeFullyQualfiedLongFileName.Buffer);
|
|
if (!lMatchDepth) continue;
|
|
|
|
|
|
//
|
|
// If this path identity is configured to only apply to
|
|
// file extensions on the "bad list" then check to see if
|
|
// the ImagePath specifies one of the bad extensions.
|
|
//
|
|
#ifdef AUTHZPOL_SAFERFLAGS_ONLY_EXES
|
|
if (lMatchDepth > 0 &&
|
|
(pAuthzIdentRecord->ImageNameInfo.dwSaferFlags &
|
|
AUTHZPOL_SAFERFLAGS_ONLY_EXES) != 0)
|
|
{
|
|
if (bPathIdentIsBadType == -1) {
|
|
BOOLEAN bResult;
|
|
|
|
Status = CodeAuthzIsExecutableFileType(
|
|
&pIdentStruct->UnicodeFullyQualfiedLongFileName, FALSE,
|
|
&bResult );
|
|
if (!NT_SUCCESS(Status) || !bResult) {
|
|
bPathIdentIsBadType = FALSE;
|
|
} else {
|
|
bPathIdentIsBadType = TRUE;
|
|
}
|
|
}
|
|
if (!bPathIdentIsBadType) {
|
|
// This identity matches against only the "bad"
|
|
// extensions, so pretend that this didn't match.
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
//
|
|
// Emit some diagnostic debugging code to show the result
|
|
// of all of the path evaluations and their match depths.
|
|
//
|
|
#ifdef VERBOSE_IDENTIFICATIONS
|
|
{
|
|
UNICODE_STRING UnicodeDebug;
|
|
WCHAR DebugBuffer[MAX_PATH*2 + 80];
|
|
|
|
// sprintf is for wimps.
|
|
RtlInitEmptyUnicodeString(&UnicodeDebug, DebugBuffer, sizeof(DebugBuffer));
|
|
RtlAppendUnicodeToString(&UnicodeDebug, L"Safer pattern ");
|
|
RtlAppendUnicodeStringToString(&UnicodeDebug, &UnicodePath);
|
|
RtlAppendUnicodeToString(&UnicodeDebug, L" matched ");
|
|
RtlAppendUnicodeStringToString(&UnicodeDebug, &(pIdentStruct->UnicodeFullyQualfiedLongFileName));
|
|
RtlAppendUnicodeToString(&UnicodeDebug, L" with value ");
|
|
UnicodeDebug.Buffer += UnicodeDebug.Length / sizeof(WCHAR);
|
|
UnicodeDebug.MaximumLength -= UnicodeDebug.Length;
|
|
RtlIntegerToUnicodeString(lMatchDepth, 10, &UnicodeDebug);
|
|
RtlAppendUnicodeToString(&UnicodeDebug, L"\n");
|
|
OUTPUTDEBUGSTRING(DebugBuffer);
|
|
}
|
|
#endif
|
|
|
|
|
|
//
|
|
// Evaluate if this path identity matches better than whatever
|
|
// best path identity that we previously had, and keep it if so.
|
|
//
|
|
if (lMatchDepth < 0) // an exact fully-qualified path!
|
|
{
|
|
if (bFirstPass ||
|
|
lBestLevelDepth >= 0 ||
|
|
pAuthzIdentRecord->dwLevelId < dwBestLevelId)
|
|
{
|
|
pBestIdentRecord = pAuthzIdentRecord;
|
|
dwBestLevelId = pAuthzIdentRecord->dwLevelId;
|
|
lBestLevelDepth = lMatchDepth;
|
|
bFirstPass = FALSE;
|
|
}
|
|
}
|
|
else // an inexact leading prefix path match.
|
|
{
|
|
ASSERT(lMatchDepth > 0);
|
|
|
|
if (bFirstPass ||
|
|
(lBestLevelDepth >= 0 &&
|
|
(lMatchDepth > lBestLevelDepth ||
|
|
(lMatchDepth == lBestLevelDepth &&
|
|
pAuthzIdentRecord->dwLevelId < dwBestLevelId)
|
|
)
|
|
)
|
|
)
|
|
{
|
|
pBestIdentRecord = pAuthzIdentRecord;
|
|
dwBestLevelId = pAuthzIdentRecord->dwLevelId;
|
|
lBestLevelDepth = lMatchDepth;
|
|
bFirstPass = FALSE;
|
|
}
|
|
}
|
|
|
|
ForLoopCleanup:
|
|
if (lpKeyname)
|
|
{
|
|
HeapFree(GetProcessHeap(), 0,lpKeyname);
|
|
lpKeyname = NULL;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
//
|
|
// If we have identified a matching WinSafer Level then
|
|
// look up the Level record for it and return success.
|
|
//
|
|
if (bFirstPass) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
pAuthzLevelRecord = CodeAuthzLevelObjpLookupByLevelId(
|
|
&g_CodeLevelObjTable, dwBestLevelId);
|
|
if (!pAuthzLevelRecord) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
*pFoundLevel = pAuthzLevelRecord;
|
|
*pbExactMatch = (lBestLevelDepth < 0 ? TRUE : FALSE);
|
|
*pFoundIdentity = pBestIdentRecord;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
|
|
|
|
ExitHandler:
|
|
|
|
if (lpKeyname)
|
|
HeapFree(GetProcessHeap(), 0,lpKeyname);
|
|
return Status;
|
|
}
|
|
|
|
|
|
|
|
NTSTATUS NTAPI
|
|
__CodeAuthzpCheckIdentityCertificateRules(
|
|
IN OUT PLOCALIDENTITYCONTEXT pIdentStruct,
|
|
OUT DWORD *dwExtendedError,
|
|
OUT PAUTHZLEVELTABLERECORD *pFoundLevel,
|
|
IN DWORD dwUIChoice
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Calls WinVerifyTrust to determine the trust level of the code
|
|
signer that has signed a piece of code.
|
|
|
|
Arguments:
|
|
|
|
pIdentStruct - context state structure.
|
|
|
|
dwExtendedError - To return extended error returned by WinVerifyTrust.
|
|
|
|
pFoundLevel - receives a pointer to the authorization Level record
|
|
indicated by the best matching rule.
|
|
|
|
dwUIChoice - optionally specifies the amount of UI that WinVerifyTrust
|
|
is allowed to display. If this argument is 0, then it is treated
|
|
as if WTD_UI_ALL had been supplied.
|
|
|
|
Return Value:
|
|
|
|
Returns STATUS_SUCCESS if a WinSafer Level has been found,
|
|
or STATUS_RETRY if the publisher was unknown and UIflags blocked prompting,
|
|
or STATUS_NOT_FOUND if not. Otherwise an error code.
|
|
|
|
--*/
|
|
{
|
|
NTSTATUS Status;
|
|
PAUTHZLEVELTABLERECORD pLevelRecord;
|
|
GUID wvtFileActionID = WINTRUST_ACTION_GENERIC_VERIFY_V2;
|
|
WINTRUST_FILE_INFO wvtFileInfo;
|
|
WINTRUST_DATA wvtData;
|
|
LONG lStatus;
|
|
DWORD dwLastError;
|
|
DWORD LocalHandleSequenceNumber;
|
|
|
|
//
|
|
// Verify that our input arguments all make sense.
|
|
//
|
|
if (!ARGUMENT_PRESENT(pIdentStruct) ||
|
|
pIdentStruct->CodeProps == NULL ) {
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto ExitHandler;
|
|
}
|
|
if ((pIdentStruct->dwCheckFlags & SAFER_CRITERIA_AUTHENTICODE) == 0 ||
|
|
!ARGUMENT_PRESENT(pIdentStruct->UnicodeFullyQualfiedLongFileName.Buffer)) {
|
|
// We're not supposed to evaluate certificates, or the
|
|
// filename was not supplied (WinVerifyTrust requires a
|
|
// filename, even if an opened handle to is also supplied).
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
if ( !ARGUMENT_PRESENT(pFoundLevel) ) {
|
|
Status = STATUS_ACCESS_VIOLATION;
|
|
goto ExitHandler;
|
|
}
|
|
ASSERT(g_TableCritSec.OwningThread == UlongToHandle(GetCurrentThreadId()));
|
|
|
|
|
|
|
|
//
|
|
// Prepare the input data structure that WinVerifyTrust expects.
|
|
//
|
|
RtlZeroMemory(&wvtData, sizeof(WINTRUST_DATA));
|
|
wvtData.cbStruct = sizeof(WINTRUST_DATA);
|
|
if ((wvtData.dwUIChoice = dwUIChoice) == 0) {
|
|
// If the UI choice element was left zero, then assume all UI.
|
|
wvtData.dwUIChoice = WTD_UI_ALL;
|
|
}
|
|
wvtData.dwProvFlags = WTD_SAFER_FLAG; // our magic flag.
|
|
wvtData.dwUnionChoice = WTD_CHOICE_FILE;
|
|
wvtData.pFile = &wvtFileInfo;
|
|
|
|
|
|
//
|
|
// Prepare the input file data structure used by WinVerifyTrust.
|
|
//
|
|
RtlZeroMemory(&wvtFileInfo, sizeof(WINTRUST_FILE_INFO));
|
|
wvtFileInfo.cbStruct = sizeof(WINTRUST_FILE_INFO);
|
|
wvtFileInfo.hFile = pIdentStruct->hFileHandle;
|
|
wvtFileInfo.pcwszFilePath = pIdentStruct->UnicodeFullyQualfiedLongFileName.Buffer;
|
|
|
|
|
|
//
|
|
// Save the global state number.
|
|
//
|
|
|
|
LocalHandleSequenceNumber = g_dwLevelHandleSequence;
|
|
|
|
//
|
|
// Leave the critical section to prevent deadlock with the LoaderLock.
|
|
//
|
|
|
|
RtlLeaveCriticalSection(&g_TableCritSec);
|
|
|
|
//
|
|
// Actually call WinVerifyTrust and save off the return code
|
|
// and last error code.
|
|
//
|
|
lStatus = WinVerifyTrust(
|
|
pIdentStruct->CodeProps->hWndParent, // hwnd
|
|
&wvtFileActionID,
|
|
&wvtData
|
|
);
|
|
|
|
dwLastError = GetLastError();
|
|
|
|
*dwExtendedError = dwLastError;
|
|
|
|
//
|
|
// Reacquire the lock and check global state.
|
|
//
|
|
|
|
RtlEnterCriticalSection(&g_TableCritSec);
|
|
|
|
|
|
//
|
|
// Check the global state and make sure that the tables were not reloaded
|
|
// when we were not looking.
|
|
//
|
|
|
|
if (LocalHandleSequenceNumber != g_dwLevelHandleSequence) {
|
|
|
|
ASSERT(FALSE);
|
|
|
|
Status = STATUS_INTERNAL_ERROR;
|
|
goto ExitHandler;
|
|
}
|
|
|
|
//
|
|
// Process the WinVerifyTrust errors per PhilH
|
|
//
|
|
|
|
pLevelRecord = NULL;
|
|
|
|
|
|
if (S_OK == lStatus && TRUST_E_SUBJECT_NOT_TRUSTED != dwLastError) {
|
|
|
|
//
|
|
// The file is signed. The publisher or hash is explicitly trusted
|
|
//
|
|
|
|
pLevelRecord = CodeAuthzLevelObjpLookupByLevelId(
|
|
&g_CodeLevelObjTable, SAFER_LEVELID_FULLYTRUSTED);
|
|
|
|
} else if (TRUST_E_EXPLICIT_DISTRUST == lStatus || TRUST_E_SUBJECT_NOT_TRUSTED == lStatus) {
|
|
|
|
//
|
|
// The publisher is revoked or explicitly untrusted. Alternatively, the hash is
|
|
// explicitly untrusted.
|
|
//
|
|
|
|
pLevelRecord = CodeAuthzLevelObjpLookupByLevelId(
|
|
&g_CodeLevelObjTable, SAFER_LEVELID_DISALLOWED);
|
|
|
|
} else {
|
|
|
|
//
|
|
// we won't be too conservative in any of the following cases.
|
|
// No explicit trust or untrust. Continue on to other SAFER checks.
|
|
//
|
|
|
|
// TRUST_E_NOSIGNATURE == lStatus
|
|
// The file isn't signed. Alternatively for TRUST_E_BAD_DIGEST == dwLastError,
|
|
// a signed file has been modified.
|
|
|
|
|
|
// CRYPT_E_SECURITY_SETTINGS == lStatus
|
|
// For authenticode downloads, the admin has disabled user UI and trust.
|
|
|
|
|
|
// any other combination of lStatus and dwLastError
|
|
// The file is signed. WVT has already called safer to check the hash rules.
|
|
|
|
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
|
|
}
|
|
|
|
if (!pLevelRecord) {
|
|
Status = STATUS_ACCESS_DENIED;
|
|
} else {
|
|
*pFoundLevel = pLevelRecord;
|
|
Status = STATUS_SUCCESS;
|
|
}
|
|
|
|
ExitHandler:
|
|
return Status;
|
|
}
|
|
|
|
|
|
|
|
BOOL WINAPI
|
|
SaferiSearchMatchingHashRules(
|
|
IN ALG_ID HashAlgorithm OPTIONAL,
|
|
IN PBYTE pHashBytes,
|
|
IN DWORD dwHashSize,
|
|
IN DWORD dwOriginalImageSize OPTIONAL,
|
|
OUT PDWORD pdwFoundLevel,
|
|
OUT PDWORD pdwSaferFlags
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This is a private function that is exported for WinVerifyTrust
|
|
to call to determine if a given hash has a WinSafer policy
|
|
associated with it.
|
|
|
|
Because this is a private function that is directly called by
|
|
outside code, there is extra work needed to enter the critical
|
|
section, reload the policy if needed, and set the value returned
|
|
by GetLastError.
|
|
|
|
Arguments:
|
|
|
|
HashAlgorithm - specifies the algorithm in which the hash
|
|
was computed (CALG_MD5, CALG_SHA, etc).
|
|
|
|
pHashBytes - pointer to a buffer containing the pre-computed
|
|
hash value of the file's contents.
|
|
|
|
dwHashSize - length indicating the size of the hash value that
|
|
is referenced by the pHashBytes argument. For example,
|
|
a 128-bit MD5 hash should have a dwHashSize length of 16.
|
|
|
|
dwOriginalImageSize - Specifies the size of the original file's
|
|
contents that are being hashed. This value is used as a
|
|
heuristic to minimize the number of comparisons that must
|
|
be done to identify a match. If this parameter is 0, then
|
|
this heuristic will not be used.
|
|
|
|
pdwFoundLevel - pointer that receives a DWORD indicating the
|
|
WinSafer LevelId that is found. This value is only written
|
|
when TRUE is returned.
|
|
|
|
pdwSaferFlags - pointer that receives a DWORD value containing flags
|
|
that control the supression of User-Interface dialogs.
|
|
This value is only written when TRUE is returned.
|
|
|
|
Return Value:
|
|
|
|
Returns TRUE if a WinSafer Level has been found, or FALSE if not.
|
|
If FALSE is returned, GetLastError() may be used to find out
|
|
specifics about why no match was found (possibly argument errors).
|
|
|
|
--*/
|
|
{
|
|
NTSTATUS Status;
|
|
PVOID RestartKey;
|
|
PAUTHZIDENTSTABLERECORD pAuthzIdentRecord;
|
|
|
|
DWORD dwBestLevelId;
|
|
DWORD dwBestSaferFlags;
|
|
BOOLEAN bFirstPass;
|
|
|
|
|
|
//
|
|
// Verify that our input arguments all make sense.
|
|
//
|
|
if (!ARGUMENT_PRESENT(pHashBytes) ||
|
|
dwHashSize < 1) {
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto ExitHandler;
|
|
}
|
|
if (!ARGUMENT_PRESENT(pdwFoundLevel) ||
|
|
!ARGUMENT_PRESENT(pdwSaferFlags)) {
|
|
Status = STATUS_ACCESS_VIOLATION;
|
|
goto ExitHandler;
|
|
}
|
|
|
|
|
|
//
|
|
// Enter the critical section and reload the tables if needed.
|
|
// Notice that a potential reload is needed here because this
|
|
// function is externally called directly.
|
|
//
|
|
if (!g_bInitializedFirstTime) {
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
goto ExitHandler;
|
|
}
|
|
RtlEnterCriticalSection(&g_TableCritSec);
|
|
if (g_bNeedCacheReload) {
|
|
Status = CodeAuthzpImmediateReloadCacheTables();
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Enumerate through all hash subkey GUIDs.
|
|
//
|
|
bFirstPass = TRUE;
|
|
RestartKey = NULL;
|
|
for (pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
|
|
RtlEnumerateGenericTableWithoutSplaying(
|
|
&g_CodeIdentitiesTable, &RestartKey);
|
|
pAuthzIdentRecord != NULL;
|
|
pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
|
|
RtlEnumerateGenericTableWithoutSplaying(
|
|
&g_CodeIdentitiesTable, &RestartKey)
|
|
)
|
|
{
|
|
if (pAuthzIdentRecord->dwIdentityType == SaferIdentityTypeImageHash)
|
|
{
|
|
//
|
|
// Ensure that the hash algorithm is the same type between
|
|
// what we were supplied and what we are matching against.
|
|
//
|
|
if (HashAlgorithm != 0 &&
|
|
pAuthzIdentRecord->ImageHashInfo.HashAlgorithm !=
|
|
HashAlgorithm) {
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// If the actual filesize does not match the filesize stored
|
|
// with the hash identity then there is no need to perform
|
|
// any comparisons involving the hash.
|
|
//
|
|
if ( dwOriginalImageSize != 0 && dwOriginalImageSize !=
|
|
pAuthzIdentRecord->ImageHashInfo.ImageSize.QuadPart ) {
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// If the hash doesn't match at all, then go onto the next one.
|
|
//
|
|
if ( dwHashSize != pAuthzIdentRecord->ImageHashInfo.HashSize ||
|
|
!RtlEqualMemory(
|
|
&pAuthzIdentRecord->ImageHashInfo.ImageHash[0],
|
|
&pHashBytes[0], dwHashSize))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// Evaluate if this identity matches better than whatever
|
|
// best path identity that we previously had, and keep it if so.
|
|
//
|
|
if ( bFirstPass ||
|
|
// we didn't have anything before.
|
|
pAuthzIdentRecord->dwLevelId < dwBestLevelId
|
|
// or specifies a less-privileged level.
|
|
)
|
|
{
|
|
dwBestLevelId = pAuthzIdentRecord->dwLevelId;
|
|
dwBestSaferFlags = pAuthzIdentRecord->ImageHashInfo.dwSaferFlags;
|
|
bFirstPass = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// If we have identified a matching WinSafer Level then
|
|
// pass it back and return success.
|
|
//
|
|
if (bFirstPass) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler2;
|
|
}
|
|
*pdwFoundLevel = dwBestLevelId;
|
|
*pdwSaferFlags = dwBestSaferFlags;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
|
|
ExitHandler2:
|
|
RtlLeaveCriticalSection(&g_TableCritSec);
|
|
|
|
ExitHandler:
|
|
if (NT_SUCCESS(Status)) {
|
|
return TRUE;
|
|
} else {
|
|
BaseSetLastNTError(Status);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
NTSTATUS NTAPI
|
|
__CodeAuthzpCheckIdentityHashRules(
|
|
IN OUT PLOCALIDENTITYCONTEXT pIdentStruct,
|
|
OUT PAUTHZLEVELTABLERECORD *pFoundLevel,
|
|
OUT PAUTHZIDENTSTABLERECORD *pFoundIdentity
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Assumes that the global table lock has already been acquired.
|
|
|
|
Arguments:
|
|
|
|
pIdentStruct -
|
|
|
|
pFoundLevel - receives a pointer to the authorization Level record
|
|
indicated by the best matching rule.
|
|
|
|
pFoundIdentity - receives a pointer to the identifier entry rule
|
|
that best matched.
|
|
|
|
Return Value:
|
|
|
|
Returns STATUS_SUCCESS if a WinSafer Level has been found,
|
|
or STATUS_NOT_FOUND if not. Otherwise an error code.
|
|
|
|
--*/
|
|
{
|
|
NTSTATUS Status;
|
|
PVOID RestartKey;
|
|
PAUTHZIDENTSTABLERECORD pAuthzIdentRecord, pBestIdentRecord;
|
|
PAUTHZLEVELTABLERECORD pAuthzLevelRecord;
|
|
DWORD dwBestLevelId;
|
|
BOOLEAN bFirstPass;
|
|
|
|
|
|
//
|
|
// Verify that our input arguments all make sense.
|
|
//
|
|
if (!ARGUMENT_PRESENT(pIdentStruct) ||
|
|
pIdentStruct->CodeProps == NULL ) {
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto ExitHandler;
|
|
}
|
|
if ((pIdentStruct->dwCheckFlags & SAFER_CRITERIA_IMAGEHASH) == 0 ||
|
|
RtlIsGenericTableEmpty(&g_CodeIdentitiesTable)) {
|
|
// We're not supposed to evaluate hashes.
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
if ( !ARGUMENT_PRESENT(pFoundLevel) ||
|
|
!ARGUMENT_PRESENT(pFoundIdentity) ) {
|
|
Status = STATUS_ACCESS_VIOLATION;
|
|
goto ExitHandler;
|
|
}
|
|
ASSERT(g_TableCritSec.OwningThread == UlongToHandle(GetCurrentThreadId()));
|
|
|
|
|
|
|
|
//
|
|
// Enumerate through all hash subkey GUIDs.
|
|
//
|
|
bFirstPass = TRUE;
|
|
RestartKey = NULL;
|
|
for (pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
|
|
RtlEnumerateGenericTableWithoutSplaying(
|
|
&g_CodeIdentitiesTable, &RestartKey);
|
|
pAuthzIdentRecord != NULL;
|
|
pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
|
|
RtlEnumerateGenericTableWithoutSplaying(
|
|
&g_CodeIdentitiesTable, &RestartKey)
|
|
)
|
|
{
|
|
if (pAuthzIdentRecord->dwIdentityType == SaferIdentityTypeImageHash)
|
|
{
|
|
//
|
|
// If the user already supplied the pre-computed hash to us,
|
|
// but not the file size, then assume that we do not need
|
|
// to consider the file size when making a comparison.
|
|
//
|
|
if (pIdentStruct->bHaveHash &&
|
|
pIdentStruct->ImageSize.QuadPart == 0) {
|
|
goto SkipToActualHashCheck;
|
|
}
|
|
|
|
|
|
//
|
|
// If the actual filesize does not match the filesize stored
|
|
// with the hash identity then there is no need to perform
|
|
// any comparisons involving the hash.
|
|
//
|
|
if ( pIdentStruct->ImageSize.QuadPart == 0 )
|
|
{
|
|
// If we don't have the ImageSize yet, then try to
|
|
// open the file and memory map it to find the size.
|
|
Status = __CodeAuthzpEnsureMapped(pIdentStruct);
|
|
if (!NT_SUCCESS(Status)) {
|
|
// If we failed to compute the MD5 sum of this, then that is
|
|
// actually rather bad, but we'll proceed to evaluate any
|
|
// non-MD5 identity rules, since ignoring them could be worse.
|
|
pIdentStruct->dwCheckFlags &= ~SAFER_CRITERIA_IMAGEHASH;
|
|
goto ExitHandler;
|
|
}
|
|
ASSERTMSG("EnsureMapped failed but did not return error",
|
|
pIdentStruct->pImageMemory != NULL &&
|
|
pIdentStruct->ImageSize.QuadPart != 0);
|
|
}
|
|
|
|
if ( pAuthzIdentRecord->ImageHashInfo.ImageSize.QuadPart !=
|
|
pIdentStruct->ImageSize.QuadPart) {
|
|
continue;
|
|
}
|
|
|
|
|
|
SkipToActualHashCheck:
|
|
//
|
|
// Dynamically compute the MD5 hash of the item if needed.
|
|
//
|
|
if (!pIdentStruct->bHaveHash)
|
|
{
|
|
// Otherwise hash was not supplied, so we must compute it now.
|
|
// Open the file and memory map it.
|
|
Status = __CodeAuthzpEnsureMapped(pIdentStruct);
|
|
if (!NT_SUCCESS(Status)) {
|
|
// If we failed to compute the MD5 sum of this, then
|
|
// that is actually rather bad, but we'll proceed to
|
|
// evaluate any non-MD5 identity rules, since ignoring
|
|
// them could be worse.
|
|
pIdentStruct->dwCheckFlags &= ~SAFER_CRITERIA_IMAGEHASH;
|
|
goto ExitHandler;
|
|
}
|
|
ASSERTMSG("EnsureMapped failed but did not return error",
|
|
pIdentStruct->pImageMemory != NULL &&
|
|
pIdentStruct->ImageSize.QuadPart != 0);
|
|
|
|
|
|
|
|
// We now have a MD5 hash to use.
|
|
pIdentStruct->FinalHashSize =
|
|
sizeof(pIdentStruct->FinalHash);
|
|
Status = CodeAuthzpComputeImageHash(
|
|
pIdentStruct->pImageMemory,
|
|
pIdentStruct->ImageSize.LowPart,
|
|
&pIdentStruct->FinalHash[0],
|
|
&pIdentStruct->FinalHashSize,
|
|
&pIdentStruct->FinalHashAlgorithm);
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto ExitHandler;
|
|
}
|
|
pIdentStruct->bHaveHash = TRUE;
|
|
}
|
|
|
|
|
|
//
|
|
// Ensure that the hash algorithm is the same type between
|
|
// what we were supplied and what we are matching against.
|
|
//
|
|
if ( pIdentStruct->FinalHashAlgorithm != 0 &&
|
|
pAuthzIdentRecord->ImageHashInfo.HashAlgorithm !=
|
|
pIdentStruct->FinalHashAlgorithm) {
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// If the hash doesn't match at all, then go onto the next one.
|
|
//
|
|
if ( pIdentStruct->FinalHashSize !=
|
|
pAuthzIdentRecord->ImageHashInfo.HashSize ||
|
|
!RtlEqualMemory(
|
|
&pIdentStruct->FinalHash[0],
|
|
&pAuthzIdentRecord->ImageHashInfo.ImageHash[0],
|
|
pIdentStruct->FinalHashSize))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// Evaluate if this identity matches better than whatever
|
|
// best path identity that we previously had, and keep it if so.
|
|
//
|
|
if ( bFirstPass ||
|
|
// we didn't have anything before.
|
|
pAuthzIdentRecord->dwLevelId < dwBestLevelId
|
|
// same scope, but specifies a less-privileged level.
|
|
)
|
|
{
|
|
pBestIdentRecord = pAuthzIdentRecord;
|
|
dwBestLevelId = pAuthzIdentRecord->dwLevelId;
|
|
bFirstPass = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// If we have identified a matching WinSafer Level then
|
|
// look up the Level record for it and return success.
|
|
//
|
|
if (bFirstPass) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
pAuthzLevelRecord = CodeAuthzLevelObjpLookupByLevelId(
|
|
&g_CodeLevelObjTable, dwBestLevelId);
|
|
if (!pAuthzLevelRecord) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
*pFoundLevel = pAuthzLevelRecord;
|
|
*pFoundIdentity = pBestIdentRecord;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
|
|
ExitHandler:
|
|
return Status;
|
|
}
|
|
|
|
|
|
NTSTATUS NTAPI
|
|
__CodeAuthzpCheckIdentityUrlZoneRules(
|
|
IN OUT PLOCALIDENTITYCONTEXT pIdentStruct,
|
|
OUT PAUTHZLEVELTABLERECORD *pFoundLevel,
|
|
OUT PAUTHZIDENTSTABLERECORD *pFoundIdentity
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Arguments:
|
|
|
|
pIdentStruct -
|
|
|
|
pFoundLevel - receives a pointer to the authorization Level record
|
|
indicated by the best matching rule.
|
|
|
|
pFoundIdentity - receives a pointer to the identifier entry rule
|
|
that best matched.
|
|
|
|
Return Value:
|
|
|
|
Returns STATUS_SUCCESS if a WinSafer Level has been found,
|
|
or STATUS_NOT_FOUND if not. Otherwise an error code.
|
|
|
|
--*/
|
|
{
|
|
NTSTATUS Status;
|
|
PVOID RestartKey;
|
|
PAUTHZIDENTSTABLERECORD pAuthzIdentRecord, pBestIdentRecord;
|
|
PAUTHZLEVELTABLERECORD pAuthzLevelRecord;
|
|
DWORD dwBestLevelId;
|
|
BOOLEAN bFirstPass;
|
|
|
|
|
|
//
|
|
// Verify that our input arguments all make sense.
|
|
//
|
|
if (!ARGUMENT_PRESENT(pIdentStruct) ||
|
|
pIdentStruct->CodeProps == NULL) {
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto ExitHandler;
|
|
}
|
|
if ((pIdentStruct->dwCheckFlags & SAFER_CRITERIA_URLZONE) == 0 ||
|
|
RtlIsGenericTableEmpty(&g_CodeIdentitiesTable)) {
|
|
// We're not supposed to evaluate zones.
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
if (!ARGUMENT_PRESENT(pFoundLevel) ||
|
|
!ARGUMENT_PRESENT(pFoundIdentity) ) {
|
|
Status = STATUS_ACCESS_VIOLATION;
|
|
goto ExitHandler;
|
|
}
|
|
ASSERT(g_TableCritSec.OwningThread == UlongToHandle(GetCurrentThreadId()));
|
|
|
|
|
|
//
|
|
// Enumerate through all UrlZone subkey GUIDs.
|
|
//
|
|
RestartKey = NULL;
|
|
bFirstPass = TRUE;
|
|
for (pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
|
|
RtlEnumerateGenericTableWithoutSplaying(
|
|
&g_CodeIdentitiesTable, &RestartKey);
|
|
pAuthzIdentRecord != NULL;
|
|
pAuthzIdentRecord = (PAUTHZIDENTSTABLERECORD)
|
|
RtlEnumerateGenericTableWithoutSplaying(
|
|
&g_CodeIdentitiesTable, &RestartKey)
|
|
)
|
|
{
|
|
if (pAuthzIdentRecord->dwIdentityType ==
|
|
SaferIdentityTypeUrlZone)
|
|
{
|
|
//
|
|
// Compare the identity with what was supplied to us.
|
|
//
|
|
if (pAuthzIdentRecord->ImageZone.UrlZoneId !=
|
|
pIdentStruct->CodeProps->UrlZoneId) {
|
|
// this zone does not match, so ignore it.
|
|
continue;
|
|
}
|
|
|
|
|
|
//
|
|
// Evaluate if this path identity matches better than whatever
|
|
// best path identity that we previously had, and keep it if so.
|
|
//
|
|
if (bFirstPass ||
|
|
// we didn't have anything better before.
|
|
pAuthzIdentRecord->dwLevelId < dwBestLevelId)
|
|
// this also matches, but specifies a less-privileged level.
|
|
{
|
|
pBestIdentRecord = pAuthzIdentRecord;
|
|
dwBestLevelId = pAuthzIdentRecord->dwLevelId;
|
|
bFirstPass = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// If we have identified a matching WinSafer Level then
|
|
// look up the Level record for it and return success.
|
|
//
|
|
if (bFirstPass) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
pAuthzLevelRecord = CodeAuthzLevelObjpLookupByLevelId(
|
|
&g_CodeLevelObjTable, dwBestLevelId);
|
|
if (!pAuthzLevelRecord) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler;
|
|
}
|
|
*pFoundLevel = pAuthzLevelRecord;
|
|
*pFoundIdentity = pBestIdentRecord;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
|
|
ExitHandler:
|
|
return Status;
|
|
}
|
|
|
|
|
|
|
|
NTSTATUS NTAPI
|
|
__CodeAuthzpIdentifyOneCodeAuthzLevel(
|
|
IN PSAFER_CODE_PROPERTIES pCodeProperties OPTIONAL,
|
|
OUT DWORD *dwExtendedError,
|
|
OUT PAUTHZLEVELTABLERECORD *pBestLevelRecord,
|
|
OUT GUID *pBestIdentGuid
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Performs the code identification process.
|
|
Assumes that the caller has already locked the global critsec.
|
|
|
|
Arguments:
|
|
|
|
pCodeProperties - pointer the single CODE_PROPERTIESW structure
|
|
that should be analyzed and evaluated. This parameter
|
|
may be specified as NULL to indicate that there are
|
|
no specific properties that should be evaluated and that
|
|
only the configured Default Level should be used.
|
|
|
|
dwExtendedError - In case of certificate rule match, return the extended
|
|
error from WinVerifyTrust.
|
|
|
|
pBestLevelRecord - returns the matching WinSafer Level record.
|
|
The value written to this parameter should only be
|
|
considered valid when STATUS_SUCCESS is also returned.
|
|
|
|
pBestIdentGuid - returns the matching Code Identity guid from
|
|
which the resulting WinSafer Level was determined.
|
|
The value written to this parameter should only be
|
|
considered valid when STATUS_SUCCESS is also returned.
|
|
|
|
This GUID may also be SAFER_GUID_RESULT_TRUSTED_CERT or
|
|
SAFER_GUID_RESULT_DEFAULT_LEVEL to indicate that the result
|
|
was from a publisher cert or a default rule match.
|
|
Note that a cert hash match will also
|
|
|
|
Return Value:
|
|
|
|
Returns STATUS_SUCCESS if a WinSafer Level has been found,
|
|
or STATUS_NOT_FOUND or another error code if not.
|
|
|
|
--*/
|
|
{
|
|
NTSTATUS Status;
|
|
LOCALIDENTITYCONTEXT identStruct = {0};
|
|
|
|
//
|
|
// Verify our input state and perform any explicit
|
|
// policy loading, if it hasn't been loaded yet.
|
|
//
|
|
if (!ARGUMENT_PRESENT(pBestLevelRecord) ||
|
|
!ARGUMENT_PRESENT(pBestIdentGuid)) {
|
|
Status = STATUS_ACCESS_VIOLATION;
|
|
goto ExitHandler;
|
|
}
|
|
ASSERT(g_TableCritSec.OwningThread == UlongToHandle(GetCurrentThreadId()));
|
|
|
|
|
|
//
|
|
// Star the identification process. If no code properties were
|
|
// supplied to us, then we can immediately skip to only
|
|
// considering the default WinSafer Level configurations.
|
|
//
|
|
if (ARGUMENT_PRESENT(pCodeProperties))
|
|
{
|
|
BOOLEAN bRetryCertRuleCheck = FALSE;
|
|
BOOLEAN bPathIsNtNamespace;
|
|
|
|
// Current best identity match.
|
|
PAUTHZLEVELTABLERECORD pAuthzLevelRecord = NULL;
|
|
PAUTHZIDENTSTABLERECORD pAuthzIdentRecord;
|
|
|
|
// Temporary evaluation identity match.
|
|
BOOL bExactPath;
|
|
PAUTHZLEVELTABLERECORD pTempLevelRecord;
|
|
PAUTHZIDENTSTABLERECORD pTempIdentRecord;
|
|
|
|
|
|
//
|
|
// Check that the CODE_PROPERTIES structure is the right size.
|
|
//
|
|
if (pCodeProperties->cbSize != sizeof(SAFER_CODE_PROPERTIES)) {
|
|
Status = STATUS_INFO_LENGTH_MISMATCH;
|
|
goto ExitHandler;
|
|
}
|
|
|
|
|
|
//
|
|
// Initialize the structure that we use to store our
|
|
// stateful information during policy evaluation.
|
|
// We don't copy everything from the CODE_PROPERTIES
|
|
// structure into the identStruct, since some of it
|
|
// is dynamically loaded/copied within "EnsureMapped".
|
|
//
|
|
RtlZeroMemory(&identStruct, sizeof(LOCALIDENTITYCONTEXT));
|
|
identStruct.CodeProps = pCodeProperties;
|
|
identStruct.dwCheckFlags = pCodeProperties->dwCheckFlags;
|
|
identStruct.ImageSize.QuadPart =
|
|
pCodeProperties->ImageSize.QuadPart;
|
|
if (identStruct.ImageSize.QuadPart != 0 &&
|
|
pCodeProperties->dwImageHashSize > 0 &&
|
|
pCodeProperties->dwImageHashSize <= SAFER_MAX_HASH_SIZE)
|
|
{
|
|
// The image hash and filesize were both supplied, therefore
|
|
// we have a valid hash and don't need to compute it ourself.
|
|
RtlCopyMemory(&identStruct.FinalHash[0],
|
|
&pCodeProperties->ImageHash[0],
|
|
pCodeProperties->dwImageHashSize);
|
|
identStruct.FinalHashSize = pCodeProperties->dwImageHashSize;
|
|
identStruct.bHaveHash = TRUE;
|
|
}
|
|
bPathIsNtNamespace = ((identStruct.dwCheckFlags &
|
|
SAFER_CRITERIA_IMAGEPATH_NT) != 0 ? TRUE : FALSE);
|
|
|
|
|
|
//
|
|
// Copy over the file handle into the context structure, if a
|
|
// handle was supplied, otherwise try to open the filepath.
|
|
//
|
|
if (pCodeProperties->hImageFileHandle != NULL &&
|
|
pCodeProperties->hImageFileHandle != INVALID_HANDLE_VALUE)
|
|
{
|
|
identStruct.hFileHandle = pCodeProperties->hImageFileHandle;
|
|
identStruct.bCloseFileHandle = FALSE;
|
|
}
|
|
else if (pCodeProperties->ImagePath != NULL)
|
|
{
|
|
HANDLE hFile;
|
|
|
|
if (bPathIsNtNamespace) {
|
|
UNICODE_STRING UnicodeFilename;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
OBJECT_ATTRIBUTES ObjectAttributes;
|
|
|
|
RtlInitUnicodeString(&UnicodeFilename, pCodeProperties->ImagePath);
|
|
InitializeObjectAttributes(
|
|
&ObjectAttributes, &UnicodeFilename,
|
|
OBJ_CASE_INSENSITIVE, NULL, NULL);
|
|
Status = NtOpenFile(&hFile, FILE_GENERIC_READ, &ObjectAttributes,
|
|
&IoStatusBlock, FILE_SHARE_READ, FILE_NON_DIRECTORY_FILE);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
hFile = NULL;
|
|
}
|
|
} else {
|
|
hFile = CreateFileW(
|
|
pCodeProperties->ImagePath,
|
|
GENERIC_READ,
|
|
FILE_SHARE_READ,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_NORMAL,
|
|
NULL);
|
|
}
|
|
|
|
if (hFile != NULL && hFile != INVALID_HANDLE_VALUE) {
|
|
identStruct.hFileHandle = hFile;
|
|
identStruct.bCloseFileHandle = TRUE;
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Reconstruct the fully qualified pathname from the handle
|
|
// or from the supplied filename.
|
|
//
|
|
Status = CodeAuthzFullyQualifyFilename(
|
|
identStruct.hFileHandle,
|
|
bPathIsNtNamespace,
|
|
pCodeProperties->ImagePath,
|
|
&identStruct.UnicodeFullyQualfiedLongFileName);
|
|
if (!NT_SUCCESS(Status) &&
|
|
pCodeProperties->ImagePath != NULL &&
|
|
!bPathIsNtNamespace)
|
|
{
|
|
// Otherwise just live with what was passed in to us.
|
|
// If allocation fails, then path criteria will just be ignored.
|
|
Status = RtlCreateUnicodeString(
|
|
&identStruct.UnicodeFullyQualfiedLongFileName,
|
|
pCodeProperties->ImagePath);
|
|
}
|
|
|
|
|
|
//
|
|
// Perform the WinVerifyTrust sequence to see if the signing
|
|
// certificate matches any of the publishers that are in the
|
|
// trusted or distrusted publisher stores. This also has the
|
|
// additional effect of checking the "signed hashes".
|
|
//
|
|
Status = __CodeAuthzpCheckIdentityCertificateRules(
|
|
&identStruct,
|
|
dwExtendedError,
|
|
&pAuthzLevelRecord,
|
|
WTD_UI_NONE);
|
|
if (NT_SUCCESS(Status)) {
|
|
// An exact publisher was found, so return immediately.
|
|
ASSERT(pAuthzLevelRecord != NULL);
|
|
*pBestLevelRecord = pAuthzLevelRecord;
|
|
RtlCopyMemory(pBestIdentGuid,
|
|
&guidTrustedCert, sizeof(GUID));
|
|
goto ExitHandler2;
|
|
} else if (STATUS_RETRY == Status) {
|
|
if (WTD_UI_NONE != identStruct.CodeProps->dwWVTUIChoice) {
|
|
// if originally supposed to suppress UI, no need to retry.
|
|
bRetryCertRuleCheck = TRUE;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// Search hash rules defined for this level/scope.
|
|
// Note that hashes match exactly or not at all,
|
|
// so if we get a positive match, then that level
|
|
// is absolutely returned.
|
|
//
|
|
Status = __CodeAuthzpCheckIdentityHashRules(
|
|
&identStruct,
|
|
&pAuthzLevelRecord,
|
|
&pAuthzIdentRecord);
|
|
if (NT_SUCCESS(Status)) {
|
|
// An exact hash identity was found, so return immediately.
|
|
ASSERT(pAuthzLevelRecord != NULL);
|
|
*pBestLevelRecord = pAuthzLevelRecord;
|
|
RtlCopyMemory(pBestIdentGuid,
|
|
&pAuthzIdentRecord->IdentGuid, sizeof(GUID));
|
|
goto ExitHandler2;
|
|
}
|
|
ASSERT(pAuthzLevelRecord == NULL);
|
|
|
|
|
|
//
|
|
// Search file path rules defined for this level/scope.
|
|
// Note that file paths can either be an exact match
|
|
// or a partial match. If we find an exact match, then
|
|
// it should be absolutely returned. Otherwise the
|
|
// path was a "grouping match" and we must compare the
|
|
// Level with all of the remaining "grouping checks".
|
|
//
|
|
Status = __CodeAuthzpCheckIdentityPathRules(
|
|
&identStruct,
|
|
&pAuthzLevelRecord,
|
|
&bExactPath,
|
|
&pAuthzIdentRecord);
|
|
if (NT_SUCCESS(Status)) {
|
|
ASSERT(pAuthzLevelRecord != NULL);
|
|
pTempLevelRecord = pAuthzLevelRecord;
|
|
pTempIdentRecord = pAuthzIdentRecord;
|
|
if (bExactPath) {
|
|
*pBestLevelRecord = pTempLevelRecord;
|
|
RtlCopyMemory(pBestIdentGuid,
|
|
&pTempIdentRecord->IdentGuid, sizeof(GUID));
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Search URL Zone identity rules.
|
|
// Note that zones are always "grouping matches",
|
|
// so they must be compared against all of the remaining
|
|
// "grouping checks".
|
|
//
|
|
Status = __CodeAuthzpCheckIdentityUrlZoneRules(
|
|
&identStruct,
|
|
&pTempLevelRecord,
|
|
&pTempIdentRecord);
|
|
if (NT_SUCCESS(Status)) {
|
|
ASSERT(pTempLevelRecord != NULL);
|
|
if (pAuthzLevelRecord == NULL ||
|
|
pTempLevelRecord->dwLevelId <
|
|
pAuthzLevelRecord->dwLevelId)
|
|
{
|
|
pAuthzLevelRecord = pTempLevelRecord;
|
|
pAuthzIdentRecord = pTempIdentRecord;
|
|
}
|
|
}
|
|
|
|
#ifdef SAFER_PROMPT_USER_FOR_DECISION_MAKING
|
|
|
|
#error "Prompting user in WinVerifyTrust"
|
|
|
|
//
|
|
// We were originally passed UI flag, but we supressed
|
|
// the UI display the first time. Call WinVerifyTrust
|
|
// again and see if user choice would allow code to run.
|
|
//
|
|
if (bRetryCertRuleCheck)
|
|
{
|
|
if (pAuthzLevelRecord != NULL) {
|
|
//If we have a rule match and the rule match is FULLYTRUSTED skip retry.
|
|
if (pAuthzLevelRecord->dwLevelId == SAFER_LEVELID_FULLYTRUSTED) {
|
|
bRetryCertRuleCheck = FALSE;
|
|
}
|
|
} else if (g_DefaultCodeLevel != NULL) {
|
|
//No rule match so far. Check default level.
|
|
//If default level is FULLY_TRUSTED skip retry
|
|
if (g_DefaultCodeLevel->dwLevelId == SAFER_LEVELID_FULLYTRUSTED) {
|
|
bRetryCertRuleCheck = FALSE;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Perform the WinVerifyTrust sequence again to see if the signing
|
|
// certificate matches any of the publishers that are in the
|
|
// trusted or distrusted publisher stores.
|
|
//
|
|
if (bRetryCertRuleCheck) {
|
|
Status = __CodeAuthzpCheckIdentityCertificateRules(
|
|
&identStruct,
|
|
&pTempLevelRecord,
|
|
identStruct.CodeProps->dwWVTUIChoice);
|
|
if (NT_SUCCESS(Status)) {
|
|
// User clicked Yes or No. Run it as such.
|
|
ASSERT(pTempLevelRecord != NULL);
|
|
*pBestLevelRecord = pTempLevelRecord;
|
|
RtlCopyMemory(pBestIdentGuid,
|
|
&guidTrustedCert, sizeof(GUID));
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
//
|
|
// If we found any Level matches at this point, then we
|
|
// should simply return that match. The identified Level
|
|
// will be the MIN() of all "grouping matches" found.
|
|
//
|
|
if (pAuthzLevelRecord != NULL) {
|
|
Status = STATUS_SUCCESS;
|
|
*pBestLevelRecord = pAuthzLevelRecord;
|
|
ASSERT(pAuthzIdentRecord != NULL);
|
|
RtlCopyMemory(pBestIdentGuid,
|
|
&pAuthzIdentRecord->IdentGuid, sizeof(GUID));
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Now we need to consider the default WinSafer Level and
|
|
// return it if one was defined. If there was no default
|
|
// defined, then we should simply return STATUS_NOT_FOUND.
|
|
//
|
|
if (g_DefaultCodeLevel != NULL) {
|
|
*pBestLevelRecord = g_DefaultCodeLevel;
|
|
RtlCopyMemory(pBestIdentGuid, &guidDefaultRule, sizeof(GUID));
|
|
Status = STATUS_SUCCESS;
|
|
goto ExitHandler2;
|
|
}
|
|
Status = STATUS_NOT_FOUND;
|
|
|
|
|
|
ExitHandler2:
|
|
__CodeAuthzpEnsureUnmapped(&identStruct);
|
|
if (identStruct.UnicodeFullyQualfiedLongFileName.Buffer != NULL) {
|
|
RtlFreeUnicodeString(&identStruct.UnicodeFullyQualfiedLongFileName);
|
|
}
|
|
if (identStruct.bCloseFileHandle && identStruct.hFileHandle != NULL) {
|
|
NtClose(identStruct.hFileHandle);
|
|
}
|
|
|
|
ExitHandler:
|
|
return Status;
|
|
}
|
|
|
|
|
|
BOOL
|
|
SaferpSkipPolicyForAdmins(VOID)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Decides whether or not Safer policy should be skipped.
|
|
Policy is skipped if
|
|
1. The caller is an Admin AND
|
|
2. The registry key specifies that the policy should be skipped
|
|
for Admins.
|
|
|
|
Arguments:
|
|
|
|
Return Value:
|
|
|
|
Returns TRUE if a policy should be skipped for admins.
|
|
Returns FALSE otherwise or in case of any intermediate errors.
|
|
|
|
--*/
|
|
|
|
{
|
|
static BOOL gSaferSkipPolicy = 2;
|
|
BOOL bIsAdmin = FALSE;
|
|
DWORD AdminSid[] = {0x201, 0x5000000, 0x20, 0x220};
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
|
|
// If we have already evaluated policy once, return the cached value.
|
|
if (2 != gSaferSkipPolicy)
|
|
{
|
|
return gSaferSkipPolicy;
|
|
}
|
|
|
|
// Set the default to "will not skip policy"
|
|
gSaferSkipPolicy = 0;
|
|
|
|
// Check if the caller is an admin.
|
|
if (CheckTokenMembership(NULL, (PSID) AdminSid, &bIsAdmin))
|
|
{
|
|
// The caller is an Admin. Let's check whether the regkey says it's ok
|
|
// to skip the policy for admins.
|
|
if (bIsAdmin)
|
|
{
|
|
const static UNICODE_STRING SaferUnicodeKeyName = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\Software\\Policies\\Microsoft\\Windows\\Safer\\CodeIdentifiers");
|
|
const static OBJECT_ATTRIBUTES SaferObjectAttributes = RTL_CONSTANT_OBJECT_ATTRIBUTES(&SaferUnicodeKeyName, OBJ_CASE_INSENSITIVE);
|
|
const static UNICODE_STRING SaferPolicyScope = RTL_CONSTANT_STRING(SAFER_POLICY_SCOPE);
|
|
|
|
HANDLE hKeyEnabled = NULL;
|
|
BYTE QueryBuffer[sizeof(KEY_VALUE_PARTIAL_INFORMATION) + 64];
|
|
PKEY_VALUE_PARTIAL_INFORMATION pKeyValueInfo = (PKEY_VALUE_PARTIAL_INFORMATION) QueryBuffer;
|
|
DWORD dwActualSize = 0;
|
|
|
|
// Open the CodeIdentifiers key.
|
|
Status = NtOpenKey(
|
|
&hKeyEnabled,
|
|
KEY_QUERY_VALUE,
|
|
(POBJECT_ATTRIBUTES) &SaferObjectAttributes
|
|
);
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
|
|
// Read the Policy Scope value.
|
|
Status = NtQueryValueKey(
|
|
hKeyEnabled,
|
|
(PUNICODE_STRING) &SaferPolicyScope,
|
|
KeyValuePartialInformation,
|
|
pKeyValueInfo,
|
|
sizeof(QueryBuffer),
|
|
&dwActualSize
|
|
);
|
|
|
|
NtClose(hKeyEnabled);
|
|
|
|
// Skip policy if the flag is set to 1.
|
|
if (NT_SUCCESS(Status)) {
|
|
if ((pKeyValueInfo->Type == REG_DWORD) &&
|
|
(pKeyValueInfo->DataLength == sizeof(DWORD)) &&
|
|
(*((PDWORD) pKeyValueInfo->Data) & 0x1)) {
|
|
|
|
gSaferSkipPolicy = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return gSaferSkipPolicy;
|
|
|
|
}
|
|
|
|
|
|
VOID
|
|
SaferpLogResultsToFile(
|
|
LPWSTR InputImageName,
|
|
LPWSTR LevelName,
|
|
LPWSTR RuleTypeName,
|
|
GUID *Guid
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Logs a message to a file specified in
|
|
|
|
HKLM\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers LogFileName.
|
|
|
|
The format of the message is:
|
|
TLIST.EXE (PID = 1076) identified C:\SAFERTEST\TEST.VBS as FULLY TRUSTED
|
|
using CERTIFICATE rul, Guid = {abcdef00-abcd-abcd-abcdefabcdef00}
|
|
|
|
Arguments:
|
|
|
|
Return Value:
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
#define SAFER_LOG_NAME1 L" (PID = "
|
|
#define SAFER_LOG_NAME2 L") identified "
|
|
#define SAFER_LOG_NAME3 L" as "
|
|
#define SAFER_LOG_NAME4 L" using "
|
|
#define SAFER_LOG_NAME5 L" rule, Guid = "
|
|
|
|
#define SAFER_INTEGER_LENGTH 20
|
|
#define SAFER_MAX_RULE_DESCRIPTION_LENGTH 12
|
|
#define SAFER_GUID_LENGTH 38
|
|
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
HANDLE hFile = NULL;
|
|
HANDLE hKey = NULL;
|
|
ULONG ProcessNameLength = 0;
|
|
PWCHAR Buffer = NULL;
|
|
ULONG BasicInfoLength = 0;
|
|
ULONG BytesWritten = 0;
|
|
|
|
UCHAR TmpBuf[] = {0xFF, 0xFE};
|
|
|
|
const static UNICODE_STRING SaferUnicodeKeyName = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\Software\\Policies\\Microsoft\\Windows\\Safer\\CodeIdentifiers");
|
|
const static OBJECT_ATTRIBUTES SaferObjectAttributes = RTL_CONSTANT_OBJECT_ATTRIBUTES(&SaferUnicodeKeyName, OBJ_CASE_INSENSITIVE);
|
|
const static UNICODE_STRING SaferPolicyScope = RTL_CONSTANT_STRING(SAFER_LOGFILE_NAME);
|
|
PROCESS_BASIC_INFORMATION ProcInfo = {0};
|
|
ULONG TotalSize = sizeof(SAFER_LOG_NAME1) +
|
|
sizeof(SAFER_LOG_NAME2) +
|
|
sizeof(SAFER_LOG_NAME3) +
|
|
sizeof(SAFER_LOG_NAME4) +
|
|
sizeof(SAFER_LOG_NAME5) +
|
|
((SAFER_INTEGER_LENGTH +
|
|
SAFER_MAX_RULE_DESCRIPTION_LENGTH +
|
|
SAFER_GUID_LENGTH) * sizeof(WCHAR));
|
|
|
|
UCHAR QueryBuffer[sizeof(KEY_VALUE_PARTIAL_INFORMATION) + MAX_PATH * sizeof(WCHAR)];
|
|
PWCHAR ProcessImageName = NULL;
|
|
PKEY_VALUE_PARTIAL_INFORMATION pKeyValueInfo = (PKEY_VALUE_PARTIAL_INFORMATION) QueryBuffer;
|
|
DWORD dwActualSize = 0;
|
|
|
|
// Open the CodeIdentifiers key.
|
|
Status = NtOpenKey(
|
|
&hKey,
|
|
KEY_QUERY_VALUE,
|
|
(POBJECT_ATTRIBUTES) &SaferObjectAttributes
|
|
);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
return;
|
|
}
|
|
|
|
// Read the name of the file for logging.
|
|
Status = NtQueryValueKey(
|
|
hKey,
|
|
(PUNICODE_STRING) &SaferPolicyScope,
|
|
KeyValuePartialInformation,
|
|
pKeyValueInfo,
|
|
sizeof(QueryBuffer),
|
|
&dwActualSize
|
|
);
|
|
|
|
NtClose(hKey);
|
|
|
|
// We do not care if the buffer size was too small to retrieve the logfile
|
|
// name since this is for troubleshooting.
|
|
if (!NT_SUCCESS(Status)) {
|
|
return;
|
|
}
|
|
|
|
// This was not a string.
|
|
if (pKeyValueInfo->Type != REG_SZ) {
|
|
return;
|
|
}
|
|
|
|
hFile = CreateFileW((LPCWSTR) pKeyValueInfo->Data, GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, 0, NULL);
|
|
|
|
if (hFile == INVALID_HANDLE_VALUE) {
|
|
return;
|
|
}
|
|
|
|
SetFilePointer (hFile, 0, NULL, FILE_BEGIN);
|
|
|
|
WriteFile (hFile, (LPCVOID)TmpBuf, 2, &BytesWritten, NULL);
|
|
|
|
SetFilePointer (hFile, 0, NULL, FILE_END);
|
|
|
|
Status = NtQueryInformationProcess(NtCurrentProcess(), ProcessImageFileName, QueryBuffer, sizeof(QueryBuffer), &ProcessNameLength);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto Cleanup;
|
|
}
|
|
|
|
ProcessImageName = (PWCHAR) (QueryBuffer + ProcessNameLength - sizeof(WCHAR));
|
|
ProcessNameLength = 1;
|
|
while (((PUCHAR) ProcessImageName >= QueryBuffer) && (*(ProcessImageName - 1) != L'\\')) {
|
|
ProcessImageName--;
|
|
ProcessNameLength++;
|
|
}
|
|
|
|
TotalSize += (ProcessNameLength + (wcslen(InputImageName) + wcslen(LevelName)) * sizeof(WCHAR));
|
|
|
|
Status = NtQueryInformationProcess(NtCurrentProcess(), ProcessBasicInformation, (PVOID) &ProcInfo, sizeof(PROCESS_BASIC_INFORMATION), &BasicInfoLength);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto Cleanup;
|
|
}
|
|
|
|
Buffer = (PWCHAR) RtlAllocateHeap(RtlProcessHeap(), 0, TotalSize);
|
|
|
|
if (Buffer == NULL) {
|
|
goto Cleanup;
|
|
}
|
|
|
|
swprintf(Buffer, L"%s%s%d%s%s%s%s%s%s%s{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\r\n",
|
|
ProcessImageName,
|
|
SAFER_LOG_NAME1,
|
|
ProcInfo.UniqueProcessId,
|
|
SAFER_LOG_NAME2,
|
|
InputImageName,
|
|
SAFER_LOG_NAME3,
|
|
LevelName,
|
|
SAFER_LOG_NAME4,
|
|
RuleTypeName,
|
|
SAFER_LOG_NAME5,
|
|
Guid->Data1, Guid->Data2, Guid->Data3, Guid->Data4[0], Guid->Data4[1], Guid->Data4[2], Guid->Data4[3], Guid->Data4[4], Guid->Data4[5], Guid->Data4[6], Guid->Data4[7]);
|
|
|
|
ASSERT((wcslen(Buffer) + 1) * sizeof(WCHAR) < TotalSize);
|
|
|
|
WriteFile (hFile, (LPCVOID)Buffer, (wcslen(Buffer) * sizeof(WCHAR)), &BytesWritten, NULL);
|
|
|
|
RtlFreeHeap(RtlProcessHeap(), 0, Buffer);
|
|
|
|
Cleanup:
|
|
CloseHandle(hFile);
|
|
|
|
|
|
}
|
|
|
|
BOOL WINAPI
|
|
SaferIdentifyLevel(
|
|
IN DWORD dwNumProperties,
|
|
IN PSAFER_CODE_PROPERTIES pCodeProperties,
|
|
OUT SAFER_LEVEL_HANDLE *pLevelHandle,
|
|
IN LPVOID lpReserved
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Performs the code identification process. Accepts an array of
|
|
CODE_PROPERTIES structures that supply all of the identification
|
|
criteria. The final result is the least privileged match resulting
|
|
from each element of the array.
|
|
|
|
Arguments:
|
|
|
|
dwNumProperties - indicates the number of CODE_PROPERTIES structures
|
|
pointed to by the CodeProperties argument.
|
|
|
|
pCodeProperties - pointer to one or more structures that specify
|
|
all of the input criteria that will be used to identify level.
|
|
|
|
pLevelHandle - pointer that will receive the opened Level object
|
|
handle when the identification operation is successful.
|
|
|
|
lpReserved - unused, must be zero.
|
|
|
|
Return Value:
|
|
|
|
Returns TRUE if a Level was identified and an opened handle
|
|
to it stored in the 'LevelHandle' argument. Otherwise this
|
|
function returns FALSE on error and GetLastError() can be used
|
|
to obtain additional information about the error.
|
|
|
|
--*/
|
|
{
|
|
DWORD Index;
|
|
NTSTATUS Status;
|
|
BOOL ReturnValue = FALSE;
|
|
PAUTHZLEVELTABLERECORD pBestLevelRecord;
|
|
GUID BestIdentGuid;
|
|
PWCHAR LocalLevelName = L"\"default\"";
|
|
PWCHAR LocalRuleName = L"default";
|
|
PWCHAR LocalImageName = L"Default";
|
|
DWORD dwExtendedError = ERROR_SUCCESS;
|
|
|
|
//
|
|
// Validate the input parameters.
|
|
//
|
|
UNREFERENCED_PARAMETER(lpReserved);
|
|
|
|
if (!ARGUMENT_PRESENT(pLevelHandle)) {
|
|
Status = STATUS_ACCESS_VIOLATION;
|
|
goto ExitHandler;
|
|
}
|
|
if (!g_bInitializedFirstTime) {
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
goto ExitHandler;
|
|
}
|
|
RtlEnterCriticalSection(&g_TableCritSec);
|
|
if (g_bNeedCacheReload) {
|
|
Status = CodeAuthzpImmediateReloadCacheTables();
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
if (RtlIsGenericTableEmpty(&g_CodeLevelObjTable)) {
|
|
// There are no levels defined! Should not happen.
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler2;
|
|
}
|
|
|
|
//
|
|
// Do not allow filehandles unless filename is specified.
|
|
//
|
|
for (Index = 0; Index < dwNumProperties; Index++)
|
|
{
|
|
if (pCodeProperties[Index].hImageFileHandle != NULL &&
|
|
pCodeProperties[Index].hImageFileHandle != INVALID_HANDLE_VALUE &&
|
|
pCodeProperties[Index].ImagePath == NULL)
|
|
{
|
|
Status = STATUS_INVALID_PARAMETER;
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
|
|
if (SaferpSkipPolicyForAdmins())
|
|
{
|
|
pBestLevelRecord = CodeAuthzLevelObjpLookupByLevelId(
|
|
&g_CodeLevelObjTable, SAFER_LEVELID_FULLYTRUSTED);
|
|
|
|
RtlCopyMemory(&BestIdentGuid, &guidDefaultRule, sizeof(GUID));
|
|
goto GotMatchingRule;
|
|
}
|
|
|
|
|
|
if (!ARGUMENT_PRESENT(pCodeProperties) || dwNumProperties == 0) {
|
|
// We were given no criteria to evaluate, so just return
|
|
// the default level. If there was no default defined,
|
|
// then we should simply return STATUS_NOT_FOUND.
|
|
if (g_DefaultCodeLevel != NULL) {
|
|
pBestLevelRecord = g_DefaultCodeLevel;
|
|
RtlCopyMemory(&BestIdentGuid, &guidDefaultRule, sizeof(GUID));
|
|
goto GotMatchingRule;
|
|
} else {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Iterate through the list of CODE_PROPERTIES supplied
|
|
// and determine the final code Level that should be used.
|
|
//
|
|
pBestLevelRecord = NULL;
|
|
for (Index = 0; Index < dwNumProperties; Index++)
|
|
{
|
|
PAUTHZLEVELTABLERECORD pOneLevelRecord;
|
|
GUID OneIdentGuid;
|
|
|
|
Status = __CodeAuthzpIdentifyOneCodeAuthzLevel(
|
|
&pCodeProperties[Index],
|
|
&dwExtendedError,
|
|
&pOneLevelRecord,
|
|
&OneIdentGuid);
|
|
if (NT_SUCCESS(Status)) {
|
|
ASSERT(pOneLevelRecord != NULL);
|
|
if (!pBestLevelRecord ||
|
|
pOneLevelRecord->dwLevelId <
|
|
pBestLevelRecord->dwLevelId )
|
|
{
|
|
pBestLevelRecord = pOneLevelRecord;
|
|
RtlCopyMemory(&BestIdentGuid, &OneIdentGuid, sizeof(GUID));
|
|
}
|
|
} else if (Status != STATUS_NOT_FOUND) {
|
|
// An unexpected error occurred, so return that.
|
|
goto ExitHandler2;
|
|
}
|
|
}
|
|
if (pBestLevelRecord == NULL) {
|
|
Status = STATUS_NOT_FOUND;
|
|
goto ExitHandler2;
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// Now we have the result so pass back a handle to the
|
|
// identified WinSafer Level.
|
|
// Allocate a handle to represent this level.
|
|
//
|
|
GotMatchingRule:
|
|
ASSERT(pBestLevelRecord != NULL);
|
|
if (IsEqualGUID(&guidDefaultRule, &BestIdentGuid))
|
|
{
|
|
// The resulting level match came from the default rule.
|
|
// Now we have to try to guess whether the default actually
|
|
// came from the Machine or User scope.
|
|
DWORD dwScopeId;
|
|
|
|
if (g_hKeyCustomRoot != NULL) {
|
|
dwScopeId = SAFER_SCOPEID_REGISTRY;
|
|
} else if (g_DefaultCodeLevelUser != NULL &&
|
|
g_DefaultCodeLevelUser->dwLevelId ==
|
|
pBestLevelRecord->dwLevelId) {
|
|
dwScopeId = SAFER_SCOPEID_USER;
|
|
} else {
|
|
dwScopeId = SAFER_SCOPEID_MACHINE;
|
|
}
|
|
|
|
Status = CodeAuthzpCreateLevelHandleFromRecord(
|
|
pBestLevelRecord, // pLevelRecord
|
|
dwScopeId, // dwScopeId
|
|
0, // dwSaferFlags
|
|
dwExtendedError,
|
|
SaferIdentityDefault,
|
|
&BestIdentGuid, // pIdentRecord
|
|
pLevelHandle // pLevelHandle
|
|
);
|
|
|
|
|
|
}
|
|
else if (IsEqualGUID(&guidTrustedCert, &BestIdentGuid))
|
|
{
|
|
// Note that when the result is from a certificate, we have
|
|
// no way of actually knowing whether the certificate was
|
|
// defined within the Machine or User scope, so we'll just
|
|
// arbitrarily pick the Machine scope for the handle to be
|
|
// based out of. Additionally, there are no SaferFlags
|
|
// persisted for certificates so we just assume 0.
|
|
Status = CodeAuthzpCreateLevelHandleFromRecord(
|
|
pBestLevelRecord, // pLevelRecord
|
|
SAFER_SCOPEID_MACHINE, // dwScopeId
|
|
0, // dwSaferFlags
|
|
dwExtendedError,
|
|
SaferIdentityTypeCertificate,
|
|
&BestIdentGuid, // pIdentRecord
|
|
pLevelHandle // pLevelHandle
|
|
);
|
|
|
|
LocalRuleName = L"certificate";
|
|
}
|
|
else
|
|
{
|
|
// Otherwise the result must have come from a path, hash,
|
|
// or zone rule, so we must look up the resulting GUID in our
|
|
// identity table and retrieve the SaferFlags that were stored
|
|
// along with that Identity record. But we won't panic if we
|
|
// can't actually find the GUID anymore (even though that should
|
|
// not ever be the case while we have the critical section).
|
|
PAUTHZIDENTSTABLERECORD pBestIdentRecord;
|
|
DWORD dwSaferFlags = 0;
|
|
SAFER_IDENTIFICATION_TYPES LocalIdentificationType = SaferIdentityDefault;
|
|
|
|
pBestIdentRecord = CodeAuthzIdentsLookupByGuid(
|
|
&g_CodeIdentitiesTable, &BestIdentGuid);
|
|
if (pBestIdentRecord != NULL) {
|
|
// we identified a level, and the match came from a Identity.
|
|
switch (pBestIdentRecord->dwIdentityType) {
|
|
case SaferIdentityTypeImageName:
|
|
dwSaferFlags = pBestIdentRecord->ImageNameInfo.dwSaferFlags;
|
|
LocalRuleName = L"path";
|
|
LocalIdentificationType = SaferIdentityTypeImageName;
|
|
break;
|
|
case SaferIdentityTypeImageHash:
|
|
dwSaferFlags = pBestIdentRecord->ImageHashInfo.dwSaferFlags;
|
|
LocalRuleName = L"hash";
|
|
LocalIdentificationType = SaferIdentityTypeImageHash;
|
|
break;
|
|
case SaferIdentityTypeUrlZone:
|
|
dwSaferFlags = pBestIdentRecord->ImageZone.dwSaferFlags;
|
|
LocalRuleName = L"zone";
|
|
LocalIdentificationType = SaferIdentityTypeUrlZone;
|
|
break;
|
|
default: break;
|
|
}
|
|
Status = CodeAuthzpCreateLevelHandleFromRecord(
|
|
pBestLevelRecord, // pLevelRecord
|
|
pBestIdentRecord->dwScopeId,
|
|
dwSaferFlags, // dwSaferFlags
|
|
dwExtendedError,
|
|
LocalIdentificationType,
|
|
&BestIdentGuid, // pIdentRecord
|
|
pLevelHandle // pLevelHandle
|
|
);
|
|
}
|
|
else
|
|
{
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
|
|
}
|
|
}
|
|
if (NT_SUCCESS(Status)) {
|
|
ReturnValue = TRUE; // success.
|
|
}
|
|
|
|
switch(pBestLevelRecord->dwLevelId)
|
|
{
|
|
case SAFER_LEVELID_FULLYTRUSTED:
|
|
LocalLevelName = L"Unrestricted";
|
|
break;
|
|
case SAFER_LEVELID_NORMALUSER:
|
|
LocalLevelName = L"Basic User";
|
|
break;
|
|
case SAFER_LEVELID_CONSTRAINED:
|
|
LocalLevelName = L"Restricted";
|
|
break;
|
|
case SAFER_LEVELID_UNTRUSTED:
|
|
LocalLevelName = L"Untrusted";
|
|
break;
|
|
case SAFER_LEVELID_DISALLOWED:
|
|
LocalLevelName = L"Disallowed";
|
|
break;
|
|
default:
|
|
ASSERT(FALSE);
|
|
break;
|
|
}
|
|
|
|
if (pCodeProperties->ImagePath != NULL) {
|
|
LocalImageName = (PWSTR) pCodeProperties->ImagePath;
|
|
}
|
|
|
|
SaferpLogResultsToFile(
|
|
LocalImageName,
|
|
LocalLevelName,
|
|
LocalRuleName,
|
|
&BestIdentGuid);
|
|
|
|
ExitHandler2:
|
|
RtlLeaveCriticalSection(&g_TableCritSec);
|
|
|
|
ExitHandler:
|
|
if (!ReturnValue) {
|
|
BaseSetLastNTError(Status);
|
|
}
|
|
|
|
return ReturnValue;
|
|
}
|