# HG changeset patch
# User Yann Laigle-Chapuy <yannlaiglechapuy@gmail.com>
# Date 1246450354 -7200
# Node ID 1846253c45455c339b627491cb4d1107ca12d0bd
# Parent 7c5c8a61a57b7720828b7dbfa87fff3b9d6444b1
add an indirect doctest
diff -r 7c5c8a61a57b -r 1846253c4545 sage/crypto/mq/sbox.py
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| 492 | 492 | ncols = 1<<n |
| 493 | 493 | |
| 494 | 494 | def _walsh_transform(f): |
| | 495 | """ |
| | 496 | Compute the Walsh transform of `f` in place. |
| | 497 | |
| | 498 | EXAMPLE:: |
| | 499 | |
| | 500 | sage: S = mq.SBox(3,2,7,1) |
| | 501 | sage: S.linear_approximation_matrix() # indirect doctest |
| | 502 | [ 2 -1 -1 0 1 0 0 -1] |
| | 503 | [ 0 -1 -1 2 -1 0 0 1] |
| | 504 | [ 0 1 -1 0 1 0 -2 1] |
| | 505 | [ 0 -1 1 0 1 -2 0 1] |
| | 506 | |
| | 507 | NOTE: internal use only; we use the specific dimension of the S-Box. |
| | 508 | """ |
| 495 | 509 | for ldk in xrange(1,m+1): |
| 496 | 510 | k = 1<<ldk |
| 497 | 511 | kh = k//2 |
