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Add license for the half MD4 algorithm used in ext2_half_md4().

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The htree implementation uses code derived from the
RSA Data Security, Inc. MD4 Message-Digest Algorithm.

Add a proper licensing statement for the code and clarify
the corresponding comments.

Approved by:	core (hrs)
This commit is contained in:
pfg 2013-08-01 16:04:48 +00:00
parent 04cde0067f
commit f35ac11d77
1 changed files with 29 additions and 5 deletions
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34
sys/fs/ext2fs/ext2_hash.c
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@ -27,6 +27,30 @@
* $FreeBSD$
*/
/*
* The following notice applies to the code in ext2_half_md4():
*
* Copyright (C) 1990-2, RSA Data Security, Inc. All rights reserved.
*
* License to copy and use this software is granted provided that it
* is identified as the "RSA Data Security, Inc. MD4 Message-Digest
* Algorithm" in all material mentioning or referencing this software
* or this function.
*
* License is also granted to make and use derivative works provided
* that such works are identified as "derived from the RSA Data
* Security, Inc. MD4 Message-Digest Algorithm" in all material
* mentioning or referencing the derived work.
*
* RSA Data Security, Inc. makes no representations concerning either
* the merchantability of this software or the suitability of this
* software for any particular purpose. It is provided "as is"
* without express or implied warranty of any kind.
*
* These notices must be retained in any copies of any part of this
* documentation and/or software.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
@ -69,13 +93,13 @@
/*
* MD4 basic transformation. It transforms state based on block.
*
* This is a half md4 algorithm because in Linux it uses this algorithm in dir
* index. This function is copied from kern/md4c.c file and is modified as
* necessary.
* This is a half md4 algorithm since Linux uses this algorithm for dir
* index. This function is derived from the RSA Data Security, Inc. MD4
* Message-Digest Algorithm and was modified as necessary.
*
* The return value of this function is uint32_t in Linux, but actually we don't
* need to check this value. So in our version this function don't return any
* values.
* need to check this value, so in our version this function doesn't return any
* value.
*/
static void
ext2_half_md4(uint32_t hash[4], uint32_t data[8])