118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <wincrypt.h>
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#include <imagehlp.h>
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#define WIN_CERT_TYPE_STACK_DLL_SIGNATURE WIN_CERT_TYPE_TS_STACK_SIGNED
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BOOL UnSignFile( LPWSTR wszFile );
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/*****************************************************************************/
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void _cdecl main(int argc, char *argv[])
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{
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WCHAR szSourceFile[ MAX_PATH + 1];
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DWORD dwBc;
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if (argc != 2) {
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printf( "Usage: %s PE_File_Name\n", argv[0] );
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exit(1);
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}
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if(RtlMultiByteToUnicodeN( szSourceFile, sizeof(szSourceFile), &dwBc,
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argv[1], (strlen(argv[1]) + 1) ) == STATUS_SUCCESS)
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{
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if(!UnSignFile(szSourceFile)) {
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printf("Error removing signature!\n");
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exit(1);
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}
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printf("Signature removed successfully.\n");
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exit(0);
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}
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else
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{
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printf("RtlMultiByteToUnicode function failed.\n");
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}
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}
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//////////////////////////////////////////////////////////////
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//
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// Open a file in the appropriate permissions / mode for doing
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// our signing stuff
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//
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//////////////////////////////////////////////////////////////
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HANDLE OpenImageFile( LPCWSTR wszFile, DWORD dwAccess )
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{
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HANDLE hFile;
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if (wszFile) {
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hFile = CreateFile( wszFile,
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dwAccess,
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FILE_SHARE_READ,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL
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);
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return hFile;
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} else {
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return INVALID_HANDLE_VALUE;
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}
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}
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///////////////////////////////////////////////////////////////////////
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//
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// Unsign Code, Data, and Resources of a PE image file
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//
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///////////////////////////////////////////////////////////////////////
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BOOL
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UnSignFile(
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LPWSTR wszFile
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)
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{
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BOOL fResult = FALSE; // preset ERROR case
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HANDLE hFile;
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DWORD dwCertIndex;
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DWORD cCert;
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if ( !(hFile = OpenImageFile( wszFile, GENERIC_WRITE | GENERIC_READ )) ) {
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printf("Error %x during OpenImageFile\n", GetLastError() );
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goto OpenImageFileError;
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}
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// Remove any and all Stack DLL Signature Certificates from PE file
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while (TRUE) {
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cCert = 0;
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dwCertIndex = 0;
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if (!ImageEnumerateCertificates(
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hFile,
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WIN_CERT_TYPE_STACK_DLL_SIGNATURE,
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&cCert,
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&dwCertIndex,
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1 // IndexCount
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)) {
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break;
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}
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if (cCert == 0) {
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break;
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}
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if (!ImageRemoveCertificate(hFile, dwCertIndex)) {
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goto ImageRemoveCertificateError;
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}
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}
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fResult = TRUE;
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ImageRemoveCertificateError:
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OpenImageFileError:
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return fResult;
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}
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