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Fix SHA-256 authors.

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The initial commit 5d018dc03549c1ee4958364712fb0c94e1bf2741
in 2007 had a comment in sha256.c that the code is based on
Crypto++ Library 5.5.1. In 2009 the Authors list in sha256.c
and the AUTHORS file was updated with information that the
code had come from Crypto++ but via 7-Zip. I know I had viewed
7-Zip's SHA-256 code but back then the C code has been identical
enough with Crypto++, so I don't why I thought the author info
would need that extra step via 7-Zip for this single file.

Another error is that I had mixed sha.* and shacal2.* files
when checking for author info in Crypto++. The shacal2.* files
aren't related to liblzma's sha256.c and thus Kevin Springle's
code in Crypto++ isn't either.

(cherry picked from commit 76946dc4336c831fe2cc26696a035d807dd3cf13)
This commit is contained in:
Lasse Collin 2024-02-09 17:20:31 +02:00
parent e5ba545f16
commit 402fb45c74
2 changed files with 6 additions and 14 deletions
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6
AUTHORS
View File

@ -9,10 +9,8 @@ Authors of XZ Utils
specifically the LZMA SDK <https://7-zip.org/sdk.html>. Without
this code, XZ Utils wouldn't exist.
The SHA-256 implementation in liblzma is based on the code found from
7-Zip <https://7-zip.org/>, which has a modified version of the SHA-256
code found from Crypto++ <https://www.cryptopp.com/>. The SHA-256 code
in Crypto++ was written by Kevin Springle and Wei Dai.
The SHA-256 implementation in liblzma is based on code written by
Wei Dai in Crypto++ Library <https://www.cryptopp.com/>.
Some scripts have been adapted from gzip. The original versions
were written by Jean-loup Gailly, Charles Levert, and Paul Eggert.

14
src/liblzma/check/sha256.c
View File

@ -2,18 +2,12 @@
//
/// \file sha256.c
/// \brief SHA-256
///
/// \todo Crypto++ has x86 ASM optimizations. They use SSE so if they
/// are imported to liblzma, SSE instructions need to be used
/// conditionally to keep the code working on older boxes.
//
// This code is based on the code found from 7-Zip, which has a modified
// version of the SHA-256 found from Crypto++ <https://www.cryptopp.com/>.
// The code was modified a little to fit into liblzma.
// The C code is based on the public domain SHA-256 code found from
// Crypto++ Library 5.5.1 released in 2007: https://www.cryptopp.com/
// A few minor tweaks have been made in liblzma.
//
// Authors: Kevin Springle
// Wei Dai
// Igor Pavlov
// Authors: Wei Dai
// Lasse Collin
//
// This file has been put into the public domain.