Project

General

Profile

SIMtrace » History » Version 51

gnutoo, 03/07/2018 02:22 AM
Mention the Full-size-SIM card to FPC adapter: If simlabTrace CCID firmware work, it could also acts as a smart card reader

1 41 tsaitgaist
{{>toc}}
2 1 laforge
3 41 tsaitgaist
h1. Osmocom SIMtrace
4
5
6 1 laforge
Osmocom SIMtrace is a software and hardware system for passively tracing SIM-ME communication between the SIM card and the mobile phone.
7
8 18 laforge
It looks a bit like this:
9 42 laforge
{{graphviz_link()
10 18 laforge
digraph G{
11
  //rankdir = LR;
12
  Phone -> SIMtrace [label = "Flexi-PCB cable"];
13 1 laforge
  SIMtrace -> SIM;
14 18 laforge
  SIMtrace -> PC [label = "USB cable"];
15 1 laforge
16
  SIMtrace [ label = "SIMtrace hardware" ];
17 18 laforge
}
18 42 laforge
}}
19 18 laforge
20 29 laforge
When connected to a phone, it looks like this:
21
22 1 laforge
23 43 laforge
!{width:50%}simtrace_and_phone.jpg!
24
25
!{width:33%}simtrace_functions.png!
26 1 laforge
27
It works by utilizing the T=0 capable USART of the USB-attached AT91SAM7 microcontroller.
28
29 46 zecke
The USART passively receives the bytes as they are exchanged on the ISO 7816-3 / TS 11.11 interface between SIM and phone. The received bytes are sent via USB to the PC, where a program called simtrace on the PC gathers data from the USB device, parses the APDUs and forwards them via GSMTAP to the wireshark protocol analyzer.
30 38 tsaitgaist
31 1 laforge
32 41 tsaitgaist
h2. Features
33 1 laforge
34
35 41 tsaitgaist
* Completely passive scanner
36
* RST and ATR detection
37
* Auto-bauding with PPS / PTS support
38
* Segmentation of APDUs
39
40
41 38 tsaitgaist
SIMtrace can be used to monitor the ME-SIM communication, but also emulate a phone or SIM, or be MitM.
42
While the hardware supports all these modes, only the monitoring aspect has been implemented in software.
43 1 laforge
44
45 41 tsaitgaist
h2. TODO
46 1 laforge
47
48 41 tsaitgaist
* Check for parity errors
49
* Verify TCK / PCK check-bytes
50
* Implement MITM
51 1 laforge
52 41 tsaitgaist
h2. Hardware
53
54
The first implementations used an Olimex SAM7-P64 development board with some of the I/O lines hooked up to the mechanical SIM card adapters from [[RebelSIM_Scanner]]. If the [[RebelSIM]] scanner is used, connect the USB even if just the lines are used. It needs to be powered, else the real reader will often fail to initialize the card.
55
56 31 laforge
Now we have a dedicated PCB design.  The schematics and Gerber files are released as open source hardware and can be produced by everyone.
57 1 laforge
58
However, those of you who are not interested in building it from scratch can buy a complete factory-produced, tested and flashed PCB assembly from http://shop.sysmocom.de/products/simtrace
59 51 gnutoo
60
It could also be interface with full size SIM card "with a separate adapter":http://shop.sysmocom.de/products/fullsize-sim-fpc
61 1 laforge
62 47 laforge
More details are available at [[SIMtrace_Hardware]]
63 1 laforge
64 41 tsaitgaist
h2. Firmware
65 1 laforge
66
67 41 tsaitgaist
The firmware for the AT91SAM7S device was written by reusing a lot of the code for the "OpenPCD":http://www.openpcd.org/
68 48 laforge
RFID reader.  Details are available at [[SIMtrace Firmware]].
69 41 tsaitgaist
70
h2. Documentation
71
72
73 1 laforge
Please check the attachments for a usermanual. In there you will find some hints to install ready made packages for
74
your favorite Linux Distribution.
75 39 laforge
76 1 laforge
77
h2. Host PC Software
78 41 tsaitgaist
79
80 46 zecke
The simtrace program is part of the ​git://git.osmocom.org/simtrace.git repository. It will bind to the USB device and send GSMTAP frames using UDP/IPv4 to localhost:4729.
81 5 laforge
82 41 tsaitgaist
h3. Preconditions
83 14 tsaitgaist
84 1 laforge
85 49 laforge
[[libosmocore:]] and headers (simtrace_usb.h) from the firmware.
86 41 tsaitgaist
87 1 laforge
additional packages :
88 41 tsaitgaist
<pre>
89 14 tsaitgaist
sudo apt-get install libusb-1.0-0-dev
90 1 laforge
</code></pre>
91 7 tsaitgaist
92 41 tsaitgaist
h3. Compiling it
93
94
95
<pre>
96 35 tsaitgaist
git clone git://git.osmocom.org/simtrace.git
97
cd simtrace/host/
98
make
99 41 tsaitgaist
</code></pre>
100 35 tsaitgaist
101
102 41 tsaitgaist
h3. Accessing it
103
104
105 35 tsaitgaist
Add udev rules so to be able to use simtrace and access the device as non-root user (only need to be in the osmocom group)
106
107 41 tsaitgaist
<pre>
108 6 tsaitgaist
sudo groupadd osmocom
109
sudo adduser $USERNAME osmocom
110 1 laforge
sudo tee /etc/udev/rules.d/10-osmocom.rules << EOF
111
# to use, install this file in /etc/udev/rules.d as 10-osmocom.rules
112 6 tsaitgaist
# rule to grant read/write access on SIMtrace to group named osmocom.
113 1 laforge
SUBSYSTEM=="usb", ATTR{idProduct}=="0762", ATTRS{idVendor}=="16c0", MODE="0660", GROUP="osmocom"
114
EOF
115
sudo service udev reload
116 41 tsaitgaist
</code></pre>
117 1 laforge
118
you must log out and back in so to take effect.
119 13 tsaitgaist
120 1 laforge
121 41 tsaitgaist
h3. Using it
122
123
124
Simply start *simtrace*.
125 1 laforge
It will send the GSMTAP frames to UDP/IPv4 localhost:4729.
126
127
It will also print hexdumps of the frames to the console, looking like this:
128 41 tsaitgaist
<pre>
129 1 laforge
sudo ./simtrace
130
APDU: (9):  a0 a4 00 00 02 6f 07 9f 0f
131
APDU: (22):  a0 c0 00 00 0f 00 00 00 09 6f 07 04 00 15 00 15 01 02 00 00 91 78
132
APDU: (9):  a0 a4 00 00 02 6f 38 9f 0f
133
APDU: (22):  a0 c0 00 00 0f 00 00 00 09 6f 38 04 00 15 00 55 01 02 00 00 91 78
134
APDU: (16):  a0 b0 00 00 09 ff 3f ff ff 00 00 3f 03 00 91 78
135
APDU: (9):  a0 a4 00 00 02 6f ad 9f 0f
136
APDU: (8):  a0 b0 00 00 01 00 91 78
137
APDU: (9):  a0 a4 00 00 02 6f 07 9f 0f
138
APDU: (16):  a0 b0 00 00 09 08 49 06 20 11 49 00 11 06 91 78
139
APDU: (9):  a0 a4 00 00 02 6f 7e 9f 0f
140
APDU: (18):  a0 b0 00 00 0b ff ff ff ff 64 f0 00 ff fe 00 03 91 78
141
APDU: (9):  a0 a4 00 00 02 6f 78 9f 0f
142 2 laforge
APDU: (9):  a0 b0 00 00 02 00 01 91 78
143
APDU: (9):  a0 a4 00 00 02 6f 74 9f 0f
144
APDU: (23):  a0 b0 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 91 78
145
APDU: (9):  a0 a4 00 00 02 6f 20 9f 0f
146 1 laforge
APDU: (16):  a0 b0 00 00 09 ff ff ff ff ff ff ff ff 07 91 78
147
APDU: (9):  a0 a4 00 00 02 6f 30 9f 0f
148
APDU: (22):  a0 c0 00 00 0f 00 00 00 f0 6f 30 04 00 11 00 55 01 02 00 00 91 78
149 41 tsaitgaist
</code></pre>
150 1 laforge
151 41 tsaitgaist
h2. Wireshark integration
152 34 tsaitgaist
153 41 tsaitgaist
154
There is an experimental patch, also part of the simtrace.git package.  It is also included in the [[wireshark]] developer version (since wireshark 1.7.1).
155
156 34 tsaitgaist
To see the APDUs in wireshark:
157 41 tsaitgaist
* on localhost SIMtrace automatically opens a UDP sink locally, no need to do any anything
158
* to get the data on another machine
159
** start an UDP sink for GSMTAP on the other machine (do not use netcat as it "connects" back)
160
<pre>
161 37 tsaitgaist
socat -u udp-recv:4729 /dev/null
162 41 tsaitgaist
</code></pre>
163
** tell SIMtrace on which machine to forward
164
<pre>
165 1 laforge
./simtrace -i 192.168.0.1
166 41 tsaitgaist
</code></pre>
167 1 laforge
168 44 laforge
!wireshark-sim.png!
169 31 laforge
170
Protocol parsing is far from being complete, patches are always welcome!
171
172 50 gnutoo
h2. Other software
173
174
* "simlabTrace":https://github.com/kamwar/simlabTrace/wiki seem to be capable of MITM and also seem to have a CCID driver to use SIMtrace as a card reader.
175
176 41 tsaitgaist
h2. Contact / Mailing List
177
178
179 1 laforge
For any development or usage related questions, there is a mailinglist [mailto:simtrace@lists.osmocom.org], you can subscribe/unsubscribe to it at http://lists.osmocom.org/mailman/listinfo/simtrace and read the archives at http://lists.osmocom.org/pipermail/simtrace/
180
181 45 laforge
Please make sure you read the [[cellular-infrastructure:MailingListRules]] before you start posting.
Add picture from clipboard (Maximum size: 48.8 MB)