uwu

sca/ascad/.gitignore

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+/ASCAD_databases

sca/ascad/attack.py

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+import logging
+import random
+
+logger = logging.getLogger(__name__)
+
+import h5py
+import matplotlib.pyplot as plt
+import numpy
+import scipy.signal
+import tqdm
+
+import numpy_popcount
+
+
+AES_SBOX = numpy.array([
+  # 0     1    2      3     4    5     6     7      8    9     A      B    C     D     E     F
+  0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
+  0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
+  0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
+  0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
+  0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
+  0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
+  0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
+  0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
+  0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
+  0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
+  0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
+  0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
+  0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
+  0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
+  0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
+  0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
+], dtype='uint8')
+
+
+def align(db, ntraces):
+    logger.info("aligning traces")
+    traces = db["traces"]
+    reference = traces[0].astype("double")
+    alignments = numpy.zeros(ntraces, "int64")
+    lags = scipy.signal.correlation_lags(len(reference), len(reference))
+    for i in tqdm.trange(1, ntraces):
+        trace = traces[i].astype("double")
+        corr = scipy.signal.correlate(reference, trace)
+
+        max_idxs = corr.argsort()[-10:][::-1]
+        max_corr = 0
+        max_idx = -1
+        for idx in max_idxs:
+            lag = lags[idx]
+            if lag == 0:
+                s_ref = reference
+                s_trs = trace
+            elif lag < 0:
+                s_ref = reference[:lag]
+                s_trs = trace[-lag:]
+            else:
+                s_ref = reference[lag:]
+                s_trs = trace[:-lag]
+            pcorr = numpy.corrcoef(s_ref, s_trs)[1,0]
+            if pcorr > max_corr:
+                max_corr = pcorr
+                max_idx = idx
+
+        lag = lags[max_idx]
+        alignments[i] = lag
+
+    alignments -= numpy.min(alignments)
+
+    traces = numpy.zeros((ntraces, 800), 'double')
+    for i in range(ntraces):
+        traces[i, alignments[i]:alignments[i]+700] = db["traces"][i]
+
+    return traces
+
+
+def main(db):
+    ntraces = 1000
+    # traces = align(db, ntraces)
+
+    traces = numpy.zeros((ntraces, 700), 'double')
+    for i in range(ntraces):
+        traces[i, :] = db["traces"][i]
+
+    # for i in range(10):
+    #     plt.plot(traces[i], color=numpy.hstack((numpy.random.random(3), [0.5])))
+    # plt.show()
+
+    logger.info("making model")
+    model = numpy.repeat(numpy.arange(256, dtype='uint8'), ntraces).reshape((256, ntraces))
+    for i in tqdm.trange(ntraces):
+        (pt, ct, key, mask, desync) = db["metadata"][i]
+        pt_v = pt[2]
+        mask_v = mask[15]
+        model[:, i] = AES_SBOX[model[:, i] ^ pt_v] ^ mask_v
+    model = numpy_popcount.popcount(model).astype("double")
+
+    input_matrix = numpy.vstack((model, traces.transpose()))
+    coefs = numpy.corrcoef(input_matrix)[0:256, 256:]
+    coefs = numpy.abs(coefs)
+    max_by_key = numpy.max(coefs, axis=1)
+    plt.plot(max_by_key)
+    plt.show()
+
+    # logger.info("making 2nd order")
+    # traces = traces.transpose()
+    # traces_x = numpy.zeros((700*699//2, ntraces), 'double')
+    # tx_i = 0
+    # for i in tqdm.trange(700):
+    #     for j in range(i+1, 700):
+    #         traces_x[tx_i, :] = numpy.abs(traces[i, :] - traces[j, :])
+    #         tx_i += 1
+    #
+    # logger.info("doing corr")
+    # ncolumns = 100
+    # step = traces_x.shape[0] // ncolumns
+    # all_coefs = None
+    # for i in tqdm.trange(ncolumns):
+    #     start = i * step
+    #     end = (i + 1) * step
+    #     input_matrix = numpy.vstack((model, traces_x[start:end, :]))
+    #     coefs = numpy.corrcoef(input_matrix)[0:256, 256:]
+    #     if all_coefs is None:
+    #         all_coefs = coefs
+    #     else:
+    #         all_coefs = numpy.hstack((all_coefs, coefs))
+    #
+    #
+    # all_coefs = numpy.abs(all_coefs)
+    # max_by_key = numpy.max(all_coefs, axis=1)
+    # plt.plot(max_by_key)
+    # plt.show()
+
+
+if __name__ == "__main__":
+    from tqdm.contrib.logging import logging_redirect_tqdm
+    logging.basicConfig(level=logging.INFO)
+    with logging_redirect_tqdm():
+        # db = h5py.File("./ASCAD_databases/ASCAD_desync100.h5", "r")
+        db = h5py.File("./ASCAD_databases/ASCAD.h5", "r")
+        main(db["Attack_traces"])