final int ownerGOffset = ServerMessageBlock.readInt4(buffer, bufferIndex); // offset to group sid
        bufferIndex += 4;
        final int saclOffset = ServerMessageBlock.readInt4(buffer, bufferIndex); // offset to sacl
        bufferIndex += 4;
        final int daclOffset = ServerMessageBlock.readInt4(buffer, bufferIndex);

        if (ownerUOffset > 0) {
            bufferIndex = start + ownerUOffset;

        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

            this.ownerGroupSid = new SID(buffer, bufferIndex);
            bufferIndex += 8 + 4 * this.ownerGroupSid.sub_authority_count;
        }

        bufferIndex = start + daclOffset;

        if (daclOffset > 0) {
            bufferIndex++; // revision
            bufferIndex++;
            SMBUtil.readInt2(buffer, bufferIndex);
            bufferIndex += 2;