/* * nextpnr -- Next Generation Place and Route * * Copyright (c) 2013 Mike Pedersen * Copyright (C) 2021 Symbiflow Authors * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ #include "bits.h" #include #include #include "log.h" NEXTPNR_NAMESPACE_BEGIN int Bits::generic_popcount(unsigned int v) { unsigned int c; // c accumulates the total bits set in v for (c = 0; v; c++) { v &= v - 1; // clear the least significant bit set } return c; } int Bits::generic_ctz(unsigned int x) { if (x == 0) { log_error("Cannot call ctz with arg = 0"); } for (size_t i = 0; i < std::numeric_limits::digits; ++i) { if ((x & (1 << i)) != 0) { return i; } } // Unreachable! log_error("Unreachable!"); } NEXTPNR_NAMESPACE_END ec86837be8eefb6f7cb819433cf1878e31d26'>refslogtreecommitdiffstats
path: root/docs/development/custom-vectors/idea.rst
blob: 336cdf014327fde3a3c870f592e84a73ebc1b947 (plain) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

IDEA vector creation
=====================

This page documents the code that was used to generate the IDEA CBC, CFB, and
OFB test vectors as well as the code used to verify them against another
implementation. The vectors were generated using OpenSSL and verified with
`Botan`_.

Creation
--------

``cryptography`` was modified to support IDEA in CBC, CFB, and OFB modes. Then
the following python script was run to generate the vector files.

.. literalinclude:: /development/custom-vectors/idea/generate_idea.py

Download link: :download:`generate_idea.py
</development/custom-vectors/idea/generate_idea.py>`


Verification
------------

The following Python code was used to verify the vectors using the `Botan`_
project's Python bindings.

.. literalinclude:: /development/custom-vectors/idea/verify_idea.py

Download link: :download:`verify_idea.py
</development/custom-vectors/idea/verify_idea.py>`

.. _`Botan`: http://botan.randombit.net
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-28 11:18:28 +0000