blob: 73ac9a5b4144e4da11d441ce87b208828d254b74 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
<?xml version="1.0" encoding="UTF-8"?>
<chapter id="chapter_introduction">
<title>Introduction</title>
<section id="intro_overview">
<title>History</title>
<para>SIMtrace was created out of necessity. Harald Welte wanted
to see the communication between a GSM Mobile Station (or
what we call a cellphone) and the SIM. He was not able to
find an existing solution, or the existing ones had mayor
drawbacks that made using them very time consuming and slow.
The Atmel AT91SAM7 came to the rescue. This microcontroller
has hardware support for the ISO7816 T0/T1 Smart Card
specification. Using this hardware with the clock coming from
the normal connection we are able to read bytes coming from
and going to the SIM.
The next step in the project was taken by Kevin Redon
that started to modify an existing AT91SAM7 design, started
to use the Free Software KiCAD CAD Software. In 2011 the project
went from having Schematics to having routed circuits, prototypes
and the final product. The first production run was in August.</para>
</section>
<section id="intro_picture">
<title>Overview</title>
<para>The setup of SIMtrace consists out of a Hardware and a
Software part. The SIM card needs to be put into the SIMtrace
Hardware, the flex cable needs to be connected to the SIMtrace
Hardware and the SIM end needs to be placed in the SIM socket
of the phone. The SIMtrace hardware can be seen as a USB device
from the host, the SIMtrace software will try to find this device
and claim it. The SIMtrace software will receive packets from the
SIMtrace hardware and can forward them using the GSMTAP protocol
to the IANA assigned GSMTAP port (4729). A modified version of Wireshark
can be used to analyze the data.</para>
<figure><title>Schematic Overview</title>
<mediaobject>
<imageobject>
<imagedata fileref="images/setup_overview.png" width="6cm"/>
</imageobject>
<textobject><phrase>SIMtrace being connected</phrase></textobject>
</mediaobject>
</figure>
</section>
</chapter>
|
