Exemplo n.º 1
0
 internal static UnsafeNativeMethods.SECURITY_ATTRIBUTES GetSecAttrs(HandleInheritability inheritability) {
     UnsafeNativeMethods.SECURITY_ATTRIBUTES secAttrs = null;
     if ((inheritability & HandleInheritability.Inheritable) != 0) {
         secAttrs = new UnsafeNativeMethods.SECURITY_ATTRIBUTES();
         secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
         secAttrs.bInheritHandle = 1;
     }
     return secAttrs;
 }
Exemplo n.º 2
0
    internal LogStream(String path, int bufferSize, LogRetentionOption retention, long maxFileSize, int maxNumOfFiles) 
    {
        Debug.Assert(!String.IsNullOrEmpty(path));

        // Get absolute path - Security needs this to prevent something
        // like trying to create a file in c:\tmp with the name 
        // "..\WinNT\System32\ntoskrnl.exe".  Store it for user convenience.
        //String filePath = Path.GetFullPathInternal(path);
        String filePath = Path.GetFullPath(path);
        _fileName = filePath;

        // Prevent access to your disk drives as raw block devices.
        if (filePath.StartsWith("\\\\.\\", StringComparison.Ordinal))
            throw new NotSupportedException(SR.GetString(SR.NotSupported_IONonFileDevices));

        UnsafeNativeMethods.SECURITY_ATTRIBUTES secAttrs = GetSecAttrs(FileShare.Read);
        
        // For mitigating local elevation of privilege attack through named pipes
        // make sure we always call CreateFile with SECURITY_ANONYMOUS so that the
        // named pipe server can't impersonate a high privileged client security context
        int flagsAndAttributes = (int)FileOptions.None | (UnsafeNativeMethods.SECURITY_SQOS_PRESENT | UnsafeNativeMethods.SECURITY_ANONYMOUS);
        
        // Only write is enabled
        //_canRead = false;
        //_canSeek = false;
        _canWrite = true;

        _pathSav = filePath;
        _fAccessSav = UnsafeNativeMethods.GENERIC_WRITE;
        _shareSav = FileShare.Read;
        _secAttrsSav = secAttrs;
        _secAccessSav = FileIOPermissionAccess.Write;
        _modeSav = (retention != LogRetentionOption.SingleFileUnboundedSize)? FileMode.Create : FileMode.OpenOrCreate;
        _flagsAndAttributesSav = flagsAndAttributes;
        _seekToEndSav = (retention != LogRetentionOption.SingleFileUnboundedSize)? false : true;
        
        this.bufferSize = bufferSize;
        _retention = retention;
        _maxFileSize = maxFileSize;
        _maxNumberOfFiles = maxNumOfFiles;

        _Init(filePath, _fAccessSav, _shareSav, _secAttrsSav, _secAccessSav, _modeSav, _flagsAndAttributesSav, _seekToEndSav);
    }
Exemplo n.º 3
0
        internal unsafe static UnsafeNativeMethods.SECURITY_ATTRIBUTES GetSecAttrs(HandleInheritability inheritability, PipeSecurity pipeSecurity, out Object pinningHandle) {
            pinningHandle = null;
            UnsafeNativeMethods.SECURITY_ATTRIBUTES secAttrs = null;
            if ((inheritability & HandleInheritability.Inheritable) != 0 || pipeSecurity != null) {
                secAttrs = new UnsafeNativeMethods.SECURITY_ATTRIBUTES();
                secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);

                if ((inheritability & HandleInheritability.Inheritable) != 0) {
                    secAttrs.bInheritHandle = 1;
                }

                // For ACLs, get the security descriptor from the PipeSecurity.
                if (pipeSecurity != null) {
                    byte[] sd = pipeSecurity.GetSecurityDescriptorBinaryForm();
                    pinningHandle = GCHandle.Alloc(sd, GCHandleType.Pinned);
                    fixed (byte* pSecDescriptor = sd) {
                        secAttrs.pSecurityDescriptor = pSecDescriptor;
                    }
                }
            }
            return secAttrs;
        }
Exemplo n.º 4
0
    private static UnsafeNativeMethods.SECURITY_ATTRIBUTES GetSecAttrs(FileShare share)
    {
        UnsafeNativeMethods.SECURITY_ATTRIBUTES secAttrs = null;
        if ((share & FileShare.Inheritable) != 0) {
            secAttrs = new UnsafeNativeMethods.SECURITY_ATTRIBUTES();
            secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);

            secAttrs.bInheritHandle = 1;
        }
        return secAttrs;
    }