2 # GoodFET Client Library
4 # (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
6 # This code is being rewritten and refactored. You've been warned!
8 import sys, time, string, cStringIO, struct, glob, serial, os, random;
11 from GoodFET import *;
14 plot "< sqlite3 glitch.db 'select time,vcc,glitchcount from glitches where count=0;'" \
17 "< sqlite3 glitch.db 'select time,vcc,count from glitches where count>0;'" \
20 "< sqlite3 glitch.db 'select time,vcc,count from glitches where count>0 and lock>0;'" \
25 class GoodFETGlitch(GoodFET):
27 def __init__(self, *args, **kargs):
28 print "Initializing GoodFET Glitcher."
29 #Database connection w/ 30 second timeout.
30 self.db=sqlite3.connect("glitch.db",30000);
31 self.db.execute("create table if not exists glitches(time,vcc,gnd,trials,glitchcount,count,lock)");
32 self.db.execute("create index if not exists glitchvcc on glitches(vcc);");
34 def setup(self,arch="avr"):
35 self.client=getClient(arch);
38 import Gnuplot, Gnuplot.PlotItems, Gnuplot.funcutils
40 print "gnuplot-py is missing. Can't graph."
42 g = Gnuplot.Gnuplot(debug=1);
45 g.title('Glitch Training Set');
46 g.xlabel('Time (16MHz)');
47 g.ylabel('VCC (DAC12)');
49 g('set datafile separator "|"');
59 import Gnuplot, Gnuplot.PlotItems, Gnuplot.funcutils
61 # print "py-gnuplot or py-numpy is missing. Can't graph."
63 g = Gnuplot.Gnuplot(debug=1);
66 g.title('Glitch Training Set');
67 g.xlabel('Time (16MHz)');
68 g.ylabel('VCC (DAC12)');
70 g('set datafile separator "|"');
72 g('set output "timevcc.png"');
78 lock=0; #1 locks, 0 unlocked
80 vstop=0xfff; #Could be as high as 0xFFF
83 tstop=-1; #<0 defaults to full range
85 self.scan(lock,trials,vstart,vstop,tstart,tstop);
87 def scan(self,lock,trials=1,vstart=0,vstop=0xfff,tstart=0,tstop=-1):
92 tstop=client.glitchstarttime(); #Really long; only use for initial investigation.
93 print "-- Start takes %04i cycles." % tstop;
99 while(client.eeprompeek(0)!=self.secret):
100 print "-- Setting secret";
103 #Flash the secret to the first two bytes of CODE memory.
105 client.eeprompoke(0,self.secret);
106 client.eeprompoke(1,self.secret);
109 #Lock chip to unlock it later.
112 voltages=range(vstart,vstop,1);
113 times=range(tstart,tstop,1);
115 gnd=0; #TODO, glitch GND.
117 random.shuffle(voltages);
118 #random.shuffle(times);
121 if not self.vccexplored(vcc):
122 print "Exploring vcc=%i" % vcc;
125 self.scanat(trials,vcc,gnd,time)
129 print "Voltage %i already explored." % vcc;
131 def vccexplored(self,vcc):
133 c.execute("select vcc from glitches where vcc=? limit 1;",[vcc]);
138 def scanat(self,trials,vcc,gnd,time):
141 client.glitchRate(time);
142 client.glitchVoltages(gnd, vcc); #drop voltage target
145 #print "-- (%5i,%5i)" % (time,vcc);
147 for i in range(0,trials):
148 client.glitchstart();
150 #Try to read *0, which is secret if read works.
151 a=client.eeprompeek(0x0);
152 if self.lock>0: #locked
153 if(a!=0 and a!=0xFF and a!=self.secret):
156 print "-- %04x: %02x HELL YEAH! " % (time, a);
163 #print "values (%i,%i,%i,%i,%i);" % (
164 # time,vcc,gnd,gcount,scount);
165 self.db.execute("insert into glitches(time,vcc,gnd,trials,glitchcount,count,lock)"
166 "values (%i,%i,%i,%i,%i,%i,%i);" % (
167 time,vcc,gnd,trials,gcount,scount,self.lock));