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[tvla] Fix plotting issues with new database and metadata format
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This commit fixes incompatibility of tvla plotting with the new database
and metadata format.
For this, additional metadata is stored in aes and otbn capture. Also, a
new wrapper function for plotting is added to the tvla script. Finally,
aes and otbn config files are adjusted.

Signed-off-by: Moritz Wettermann <[email protected]>
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@wettermo
wettermo committed Jan 5, 2024
1 parent c959d89 commit 5a96d4d
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Showing 8 changed files with 141 additions and 122 deletions.
2 changes: 1 addition & 1 deletion analysis/configs/tvla_cfg_aes_specific_byte0_rnd0.yaml
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
project_file: projects/simple_capture_aes_sca
project_file: ../capture/projects/simple_capture_aes_sca
trace_file: null
trace_start: null
trace_end: null
Expand Down
7 changes: 5 additions & 2 deletions analysis/configs/tvla_cfg_otbn_keygen.yaml
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
project_file: projects/opentitan_otbn_vertical_keygen.cwp
project_file: ../capture/projects/otbn_vertical_sca_cw310_keygen
trace_file: null
trace_start: null
trace_end: null
Expand All @@ -16,4 +16,7 @@ general_test: true
mode: otbn
key_len_bytes: 40
sample_start: null
num_samples : 3500
num_samples : null
filter_traces: true
trace_threshold: 1000
trace_db: ot_trace_library
7 changes: 5 additions & 2 deletions analysis/configs/tvla_cfg_otbn_modinv.yaml
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
project_file: projects/opentitan_otbn_vertical_modinv.cwp
project_file: ../capture/projects/otbn_vertical_sca_cw310_modinv
trace_file: null
trace_start: null
trace_end: null
Expand All @@ -16,4 +16,7 @@ general_test: true
mode: otbn
key_len_bytes: 32
sample_start: null
num_samples : 10000
num_samples : null
filter_traces: true
trace_threshold: 1000
trace_db: ot_trace_library
233 changes: 121 additions & 112 deletions analysis/tvla.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
from types import SimpleNamespace

import matplotlib.pyplot as plt
import math
import numpy as np
import typer
import yaml
Expand Down Expand Up @@ -162,6 +163,62 @@ def compute_histograms_aes(trace_resolution, rnd_list, byte_list, traces, leakag
return histograms


def tvla_plotting_fnc(axs, num_orders, ttest_trace, single_trace, threshold, num_samples, sample_start, metadata):
"""Plotting trace in different colors, depending on where the trigger is high
"""
c = np.ones(num_samples)
xaxs = range(sample_start, sample_start + num_samples)
offset = int(metadata["offset_samples"])
# Catch case where trigger data isn't saved to project file (e.g. older measurement)
try:
trigger_samples = int(metadata["samples_trigger_high"])
except KeyError:
trigger_samples = num_samples + offset
trigger_low = trigger_samples - (sample_start + offset)
trigger_high = 0
if offset < 0:
trigger_high = abs(offset)
if trigger_low < 0:
trigger_low = 0
if trigger_low > num_samples:
trigger_low = num_samples
axs[0].set_ylabel("trace")
if trigger_high > 0:
axs[0].plot(xaxs[:trigger_high],
single_trace[:trigger_high],
"grey",
label='trigger low')
if trigger_low > trigger_high:
axs[0].plot(xaxs[trigger_high:trigger_low],
single_trace[trigger_high:trigger_low],
"k",
label='trigger high')
if trigger_low < num_samples:
axs[0].plot(xaxs[trigger_low:],
single_trace[trigger_low:],
"grey",
label='trigger low')
axs[0].legend(loc='upper right', prop={'size': 7})
for i_order in range(num_orders):
axs[1 + i_order].set_ylabel('t-test ' + str(i_order + 1))
axs[1 + i_order].plot(xaxs, c * threshold, "r")
axs[1 + i_order].plot(xaxs, -threshold * c, "r")
if trigger_high > 0:
axs[1 + i_order].plot(
xaxs[:trigger_high],
ttest_trace[i_order, 0, 0][:trigger_high], "grey")
if trigger_low > trigger_high:
axs[1 + i_order].plot(
xaxs[trigger_high:trigger_low],
ttest_trace[i_order, 0, 0][trigger_high:trigger_low], "k")
if trigger_low < num_samples:
axs[1 + i_order].plot(
xaxs[trigger_low:],
ttest_trace[i_order, 0, 0][trigger_low:], "grey")

return axs


@app.command()
def run_tvla(ctx: typer.Context):
"""Run TVLA described in "Fast Leakage Assessment"."""
Expand Down Expand Up @@ -698,72 +755,73 @@ def run_tvla(ctx: typer.Context):

# Metadata text variable for plot
textbox = ""
# Metadata currently not implemented for OTTraceLib
if not OTTraceLib:
# Catch case where certain metadata isn't saved to project file (e.g. older measurement)
try:
pll_freq = float(metadata['ChipWhisperer']
['General Settings']['pll_frequency']) / 1e6
textbox = textbox + "PLL:\n" + str(pll_freq) + " MHz\n\n"
except KeyError:
textbox = textbox
try:
pll_freq = float(metadata['ChipWhisperer']
['General Settings']['sample_rate']) / 1e6
textbox = textbox + "ADC:\n" + str(pll_freq) + " MS/s\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Masks off:\n" + metadata[
'ChipWhisperer']['General Settings']['masks_off'] + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Samples:\n" + metadata['ChipWhisperer'][
'General Settings']['num_samples'] + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Offset:\n" + metadata['ChipWhisperer'][
'General Settings']['offset'] + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Scope gain:\n" + metadata[
'ChipWhisperer']['General Settings']['scope_gain'] + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Traces:\n" + metadata['ChipWhisperer'][
'General Settings']['num_traces'] + "\n\n"
except KeyError:
textbox = textbox
if textbox != "":
# remove last two linebreaks
textbox = textbox[:-2]
# Catch case where certain metadata isn't saved to project file (e.g. older measurement)
try:
sampling_rate = float(metadata['sampling_rate']) / 1e6
textbox = textbox + "Sample rate:\n" + str(math.floor(sampling_rate)) + " MS/s\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Masks off:\n" + metadata['masks_off'] + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Samples:\n" + str(metadata['num_samples']) + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Offset:\n" + str(metadata['offset_samples']) + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Scope gain:\n" + str(metadata['scope_gain']) + "\n\n"
except KeyError:
textbox = textbox
try:
textbox = textbox + "Traces:\n" + str(num_traces) + "\n\n"
except KeyError:
textbox = textbox
if textbox != "":
# remove last two linebreaks
textbox = textbox[:-2]

# Plotting figures for t-test statistics vs. time.
log.info("Plotting T-test Statistics vs. Time.")
xaxs = range(sample_start, sample_start + num_samples)
fig, axs = plt.subplots(num_orders + 1, 1, sharex=True)
if cfg["mode"] == "aes" and general_test is False:
# By default the figures are saved under tmp/t_test_round_x_byte_y.png.
for i_rnd in range(num_rnds):
for i_byte in range(num_bytes):

c = np.ones(num_samples)
fig, axs = plt.subplots(num_orders + 1,
1,
sharex=True)

axs[0].plot(xaxs, single_trace, "k")
axs[0].set_ylabel("trace")
for i_order in range(num_orders):
axs[i_order + 1].plot(
ttest_trace[i_order, rnd_ext[i_rnd],
byte_ext[i_byte]], 'k')
axs[i_order + 1].plot(c * threshold, 'r')
axs[i_order + 1].plot(-threshold * c, 'r')
axs[i_order + 1].set_ylabel('t-test ' + str(i_order + 1))
axs = tvla_plotting_fnc(axs, num_orders, ttest_trace, single_trace, threshold, num_samples, sample_start, metadata)

# Catch case where datetime data isn't saved to project file (e.g. older measurement)
try:
axs[0].set_title("TVLA of " + "aes_t_test_round_" +
str(rnd_list[i_rnd]) + "_byte_" +
str(byte_list[i_byte]) + "\n" +
"Captured: " + metadata['datetime'])
except KeyError:
axs[0].set_title("TVLA of " + "aes_t_test_round_" +
str(rnd_list[i_rnd])
) + "_byte_" + str(byte_list[i_byte])

# Add metadata to plot
if textbox != "":
left, width = .67, .5
bottom, height = .25, .5
right = left + width
top = bottom + height
plt.gcf().text(0.5 * (left + right),
0.5 * (bottom + top),
textbox,
fontsize=9,
horizontalalignment='center',
verticalalignment='center',
bbox=dict(boxstyle='round',
facecolor='w',
linewidth=0.6))
plt.subplots_adjust(right=0.84)
plt.xlabel("time [samples]")

filename = "aes_t_test_round_" + str(rnd_list[i_rnd])
Expand All @@ -775,66 +833,16 @@ def run_tvla(ctx: typer.Context):
plt.close()

else:
c = np.ones(num_samples)
fig, axs = plt.subplots(3, sharex=True)
axs = tvla_plotting_fnc(axs, num_orders, ttest_trace, single_trace, threshold, num_samples, sample_start, metadata)

# Catch case where datetime data isn't saved to project file (e.g. older measurement)
try:
axs[0].set_title("TVLA of " +
(cfg["project_file"]).rsplit('/')[1] + "\n" +
"Captured: " + project.config['ChipWhisperer']
['General Settings']['datetime'])
(cfg["project_file"]).rsplit('/')[3] + "\n" +
"Captured: " + metadata["datetime"])
except KeyError:
axs[0].set_title("TVLA of " +
(cfg["project_file"]).rsplit('/')[1])

# Catch case where trigger data isn't saved to project file (e.g. older measurement)
try:
# Plot trace in different colors, depending on where the trigger is high
trigger_samples = int(
project.config['ChipWhisperer']['General Settings']
['samples_trigger_high'])
offset = int(project.config['ChipWhisperer']
['General Settings']['offset'])
trigger_high = trigger_samples - (sample_start + offset)
if trigger_high < 0:
trigger_high = 0
axs[0].set_ylabel("trace")
if trigger_high >= num_samples:
axs[0].plot(xaxs, single_trace, "k")
else:
axs[0].plot(xaxs[:trigger_high],
single_trace[:trigger_high],
"k",
label='trigger high')
axs[0].plot(xaxs[trigger_high:],
single_trace[trigger_high:],
"grey",
label='trigger low')
axs[0].legend(loc='upper right', prop={'size': 7})
for i_order in range(num_orders):
axs[1 + i_order].set_ylabel('t-test ' + str(i_order + 1))
axs[1 + i_order].plot(xaxs, c * threshold, "r")
axs[1 + i_order].plot(xaxs, -threshold * c, "r")
if trigger_high >= num_samples:
axs[1 + i_order].plot(xaxs, ttest_trace[i_order, 0, 0],
"k")
else:
axs[1 + i_order].plot(
xaxs[:trigger_high],
ttest_trace[i_order, 0, 0][:trigger_high], "k")
axs[1 + i_order].plot(
xaxs[trigger_high:],
ttest_trace[i_order, 0, 0][trigger_high:], "grey")
except KeyError:
axs[0].plot(xaxs, single_trace, "k")
axs[0].set_ylabel("trace")
for i_order in range(num_orders):
axs[1 + i_order].plot(xaxs, ttest_trace[i_order, 0, 0],
"k")
axs[1 + i_order].plot(xaxs, c * threshold, "r")
axs[1 + i_order].plot(xaxs, -threshold * c, "r")
axs[1 + i_order].set_ylabel('t-test ' + str(i_order + 1))
(cfg["project_file"]).rsplit('/')[3])

# Add metadata to plot
if textbox != "":
Expand All @@ -852,6 +860,7 @@ def run_tvla(ctx: typer.Context):
facecolor='w',
linewidth=0.6))
plt.subplots_adjust(right=0.84)

plt.xlabel("time [samples]")
plt.savefig('tmp/figures/' + cfg["mode"] + '_fixed_vs_random.png')
plt.show()
Expand Down
2 changes: 2 additions & 0 deletions capture/capture_aes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -429,6 +429,8 @@ def main(argv=None):
metadata["cfg"] = cfg
metadata["num_samples"] = scope.scope_cfg.num_samples
metadata["offset_samples"] = scope.scope_cfg.offset_samples
metadata["sampling_rate"] = scope.scope_cfg.sampling_rate
metadata["num_traces"] = capture_cfg.num_traces
metadata["scope_gain"] = scope.scope_cfg.scope_gain
metadata["cfg_file"] = str(args.cfg)
# Store bitstream information.
Expand Down
6 changes: 6 additions & 0 deletions capture/capture_otbn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -745,6 +745,12 @@ def main(argv=None):
metadata["num_samples"] = scope.scope_cfg.num_samples
metadata["offset_samples"] = scope.scope_cfg.offset_samples
metadata["scope_gain"] = scope.scope_cfg.scope_gain
if cfg["capture"]["scope_select"] == "husky":
metadata["sampling_rate"] = scope.scope.scope.clock.adc_freq / scope.scope.scope.adc.decimate
metadata["samples_trigger_high"] = scope.scope.scope.adc.trig_count
else:
metadata["sampling_rate"] = scope.scope_cfg.sampling_rate
metadata["num_traces"] = capture_cfg.num_traces
metadata["cfg_file"] = str(args.cfg)
# Store bitstream information.
metadata["fpga_bitstream_path"] = cfg["target"]["fpga_bitstream"]
Expand Down
2 changes: 0 additions & 2 deletions capture/configs/otbn_vertical_keygen_sca_cw310.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -28,8 +28,6 @@ capture:
scope_select: husky
show_plot: True
plot_traces: 100
num_cycles: 200
offset_cycles: 0
num_traces: 1000
trace_threshold: 10000
trace_db: ot_trace_library
Expand Down
4 changes: 1 addition & 3 deletions capture/configs/otbn_vertical_modinv_sca_cw310.yaml
View file
Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ target:
husky:
sampling_rate: 200000000
num_segments: 20
num_cycles: 200
num_cycles: 1000
offset_cycles: 0
scope_gain: 24
adc_mul: 1
Expand All @@ -28,8 +28,6 @@ capture:
scope_select: husky
show_plot: True
plot_traces: 100
num_cycles: 100000
offset_cycles: 0
num_traces: 1000
trace_threshold: 10000
trace_db: ot_trace_library
Expand Down

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