From 843e9120b35ae0e4de791cebb37fa8ce46272d76 Mon Sep 17 00:00:00 2001
From: Denis Ahrens <denis@h3q.com>
Date: Sat, 1 Dec 2012 08:41:25 +0100
Subject: [PATCH] libztex: Match mining firmware ZTEX descriptor against the
 dummy firmware

The first 8 bytes are matched, which ensures that the mining firmware
actually fits the hardware, assuming that the correct dummy firmware
is present in the device.
---
 libztex.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libztex.c b/libztex.c
index de00baed..f179c680 100644
--- a/libztex.c
+++ b/libztex.c
@@ -152,6 +152,15 @@ static enum check_result libztex_checkDevice(struct libusb_device *dev)
 		goto done;
 	}
 
+	// in buf[] is still the identifier of the dummy firmware
+	// use it to compare it with the new firmware
+	char *rv = memmem(fw_buf, got_bytes, buf, 8);
+	if (rv == NULL)
+	{
+		applog(LOG_ERR, "%s: found firmware is not ZTEX", __func__);
+		goto done;
+	}
+
 	// reset 1
 	buf[0] = 1;
 	cnt = libusb_control_transfer(hndl, 0x40, 0xA0, 0xE600, 0, buf, 1,1000);