srvsvc.ShareInfo502 info502 = new srvsvc.ShareInfo502();
        // Create a minimal valid security descriptor binary
        // Format: revision(1) + sbz1(1) + control(2) + ownerOffset(4) + groupOffset(4) + saclOffset(4) + daclOffset(4) = 20 bytes minimum
        byte[] securityDescriptorBytes = new byte[20];
        securityDescriptorBytes[0] = 1; // revision
        securityDescriptorBytes[1] = 0; // sbz1
        // control flags (2 bytes)

        SMBUtil.writeInt4(daclOffset, testBuffer, 16); // DACL offset

        // DACL header at offset 100
        testBuffer[daclOffset] = 0x02; // revision
        testBuffer[daclOffset + 1] = 0x00; // padding
        SMBUtil.writeInt2(0, testBuffer, daclOffset + 2); // size
        SMBUtil.writeInt4(1, testBuffer, daclOffset + 4); // ACE count

        // Simple ACE