pcaro90 / python-aes-base Goto Github PK
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License: Other
Generator for S-Box, inverted S-Box, lookup tables for Galois Field product, and Rcon.
License: Other
Hi,
I used your Python-AES-base to generate sbox, isbox and rcon using the following code, but the result is very slow (about 8 seconds) :
#!/usr/bin/env python
from __future__ import print_function
from AES_base_generator import *
def tic():
#Homemade version of matlab tic and toc functions
import time
global startTime_for_tictoc
startTime_for_tictoc = time.time()
def toc():
import time
if 'startTime_for_tictoc' in globals():
print("Elapsed time is " + str(time.time() - startTime_for_tictoc) + " seconds.")
else:
print("Toc: start time not set")
def main() :
tic()
irreducible_polynomial = BinPol(0b100011011)
toc()
primitive = BinPol(3, irreducible_polynomial)
toc()
antilog = [primitive**i for i in range(256)]
toc()
log = [BinPol(0, irreducible_polynomial) for i in range(256)]
toc()
for i, a in enumerate(antilog): log[a.dec] = BinPol(i, irreducible_polynomial)
toc()
inv = [inv_pol(BinPol(i), antilog, log) for i in range(256)]
toc()
sbox = [affine_transformation(a) for a in inv]
toc()
print("=> sbox = ", end='')
print(sbox)
isbox = [BinPol(0, irreducible_polynomial) for i in range(256)]
toc()
for i, a in enumerate(sbox): isbox[a.dec] = BinPol(i, irreducible_polynomial)
toc()
print("=> isbox = ", end='')
print(isbox)
primitive = BinPol(2, irreducible_polynomial)
toc()
Rcon = [primitive**(i-1) for i in range(256)]
toc()
Rcon[0] = BinPol(0)
toc()
print("=> Rcon = ", end='')
print(Rcon)
main()
This is the output :
Elapsed time is 2.40802764893e-05 seconds.
Elapsed time is 8.20159912109e-05 seconds.
Elapsed time is 4.555382967 seconds.
Elapsed time is 4.55644106865 seconds.
Elapsed time is 4.55858302116 seconds.
Elapsed time is 4.56369900703 seconds.
Elapsed time is 4.66292786598 seconds.
=> sbox = [63, 7c, 77, 7b, f2, 6b, 6f, c5, 30, 01, 67, 2b, fe, d7, ab, 76, ca, 82, c9, 7d, fa, 59, 47, f0, ad, d4, a2, af, 9c, a4, 72, c0, b7, fd, 93, 26, 36, 3f, f7, cc, 34, a5, e5, f1, 71, d8, 31, 15, 04, c7, 23, c3, 18, 96, 05, 9a, 07, 12, 80, e2, eb, 27, b2, 75, 09, 83, 2c, 1a, 1b, 6e, 5a, a0, 52, 3b, d6, b3, 29, e3, 2f, 84, 53, d1, 00, ed, 20, fc, b1, 5b, 6a, cb, be, 39, 4a, 4c, 58, cf, d0, ef, aa, fb, 43, 4d, 33, 85, 45, f9, 02, 7f, 50, 3c, 9f, a8, 51, a3, 40, 8f, 92, 9d, 38, f5, bc, b6, da, 21, 10, ff, f3, d2, cd, 0c, 13, ec, 5f, 97, 44, 17, c4, a7, 7e, 3d, 64, 5d, 19, 73, 60, 81, 4f, dc, 22, 2a, 90, 88, 46, ee, b8, 14, de, 5e, 0b, db, e0, 32, 3a, 0a, 49, 06, 24, 5c, c2, d3, ac, 62, 91, 95, e4, 79, e7, c8, 37, 6d, 8d, d5, 4e, a9, 6c, 56, f4, ea, 65, 7a, ae, 08, ba, 78, 25, 2e, 1c, a6, b4, c6, e8, dd, 74, 1f, 4b, bd, 8b, 8a, 70, 3e, b5, 66, 48, 03, f6, 0e, 61, 35, 57, b9, 86, c1, 1d, 9e, e1, f8, 98, 11, 69, d9, 8e, 94, 9b, 1e, 87, e9, ce, 55, 28, df, 8c, a1, 89, 0d, bf, e6, 42, 68, 41, 99, 2d, 0f, b0, 54, bb, 16]
Elapsed time is 4.66491699219 seconds.
Elapsed time is 4.6679289341 seconds.
=> isbox = [52, 09, 6a, d5, 30, 36, a5, 38, bf, 40, a3, 9e, 81, f3, d7, fb, 7c, e3, 39, 82, 9b, 2f, ff, 87, 34, 8e, 43, 44, c4, de, e9, cb, 54, 7b, 94, 32, a6, c2, 23, 3d, ee, 4c, 95, 0b, 42, fa, c3, 4e, 08, 2e, a1, 66, 28, d9, 24, b2, 76, 5b, a2, 49, 6d, 8b, d1, 25, 72, f8, f6, 64, 86, 68, 98, 16, d4, a4, 5c, cc, 5d, 65, b6, 92, 6c, 70, 48, 50, fd, ed, b9, da, 5e, 15, 46, 57, a7, 8d, 9d, 84, 90, d8, ab, 00, 8c, bc, d3, 0a, f7, e4, 58, 05, b8, b3, 45, 06, d0, 2c, 1e, 8f, ca, 3f, 0f, 02, c1, af, bd, 03, 01, 13, 8a, 6b, 3a, 91, 11, 41, 4f, 67, dc, ea, 97, f2, cf, ce, f0, b4, e6, 73, 96, ac, 74, 22, e7, ad, 35, 85, e2, f9, 37, e8, 1c, 75, df, 6e, 47, f1, 1a, 71, 1d, 29, c5, 89, 6f, b7, 62, 0e, aa, 18, be, 1b, fc, 56, 3e, 4b, c6, d2, 79, 20, 9a, db, c0, fe, 78, cd, 5a, f4, 1f, dd, a8, 33, 88, 07, c7, 31, b1, 12, 10, 59, 27, 80, ec, 5f, 60, 51, 7f, a9, 19, b5, 4a, 0d, 2d, e5, 7a, 9f, 93, c9, 9c, ef, a0, e0, 3b, 4d, ae, 2a, f5, b0, c8, eb, bb, 3c, 83, 53, 99, 61, 17, 2b, 04, 7e, ba, 77, d6, 26, e1, 69, 14, 63, 55, 21, 0c, 7d]
Elapsed time is 4.66846108437 seconds.
Elapsed time is 8.08261108398 seconds.
Elapsed time is 8.08264708519 seconds.
=> Rcon = [00, 01, 02, 04, 08, 10, 20, 40, 80, 1b, 36, 6c, d8, ab, 4d, 9a, 2f, 5e, bc, 63, c6, 97, 35, 6a, d4, b3, 7d, fa, ef, c5, 91, 39, 72, e4, d3, bd, 61, c2, 9f, 25, 4a, 94, 33, 66, cc, 83, 1d, 3a, 74, e8, cb, 8d, 01, 02, 04, 08, 10, 20, 40, 80, 1b, 36, 6c, d8, ab, 4d, 9a, 2f, 5e, bc, 63, c6, 97, 35, 6a, d4, b3, 7d, fa, ef, c5, 91, 39, 72, e4, d3, bd, 61, c2, 9f, 25, 4a, 94, 33, 66, cc, 83, 1d, 3a, 74, e8, cb, 8d, 01, 02, 04, 08, 10, 20, 40, 80, 1b, 36, 6c, d8, ab, 4d, 9a, 2f, 5e, bc, 63, c6, 97, 35, 6a, d4, b3, 7d, fa, ef, c5, 91, 39, 72, e4, d3, bd, 61, c2, 9f, 25, 4a, 94, 33, 66, cc, 83, 1d, 3a, 74, e8, cb, 8d, 01, 02, 04, 08, 10, 20, 40, 80, 1b, 36, 6c, d8, ab, 4d, 9a, 2f, 5e, bc, 63, c6, 97, 35, 6a, d4, b3, 7d, fa, ef, c5, 91, 39, 72, e4, d3, bd, 61, c2, 9f, 25, 4a, 94, 33, 66, cc, 83, 1d, 3a, 74, e8, cb, 8d, 01, 02, 04, 08, 10, 20, 40, 80, 1b, 36, 6c, d8, ab, 4d, 9a, 2f, 5e, bc, 63, c6, 97, 35, 6a, d4, b3, 7d, fa, ef, c5, 91, 39, 72, e4, d3, bd, 61, c2, 9f, 25, 4a, 94, 33, 66, cc, 83, 1d, 3a, 74, e8, cb, 8d]
It seems antilog = [primitive**i for i in range(256)]
and Rcon = [primitive**(i-1) for i in range(256)]
take 4 seconds each.
Can you have a look ?
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