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f075e7631f
The struct MD5Context character buffer is cast to an int32_t* without
making sure that said buffer is aligned.
Since the buffer follows two uint32_t's, the chance of 'in' being (32
bits) unaligned is nil in practice. But adding code to ensure that 'in'
stays aligned costs nothing and removes all doubts about the casts being
safe.
(closes issue ASTERISK-20241)
Reported by: Walter Doekes
Patches:
tmp.diff (license #5674) patch uploaded by Walter Doekes
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@371952 65c4cc65-6c06-0410-ace0-fbb531ad65f3
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!\file
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* \brief MD5 digest functions
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*/
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#ifndef _ASTERISK_MD5_H
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#define _ASTERISK_MD5_H
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struct MD5Context {
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uint32_t buf[4];
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uint32_t bits[2];
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/*! Align because we cast this buffer to uint32s */
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unsigned char in[64] __attribute__((aligned(__alignof__(uint32_t))));
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};
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void MD5Init(struct MD5Context *context);
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void MD5Update(struct MD5Context *context, unsigned char const *buf,
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unsigned len);
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void MD5Final(unsigned char digest[16], struct MD5Context *context);
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void MD5Transform(uint32_t buf[4], uint32_t const in[16]);
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#endif /* _ASTERISK_MD5_H */
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