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synced 2024-12-06 19:41:15 +01:00
Nick Mathewson
59f9097d5c
Here I looked at the results of the automated conversion and cleaned them up as follows: If there was a tor_memcmp or tor_memeq that was in fact "safe"[*] I changed it to a fast_memcmp or fast_memeq. Otherwise if there was a tor_memcmp that could turn into a tor_memneq or tor_memeq, I converted it. This wants close attention. [*] I'm erring on the side of caution here, and leaving some things as tor_memcmp that could in my opinion use the data-dependent fast_memcmp variant.
31 lines
910 B
C
31 lines
910 B
C
/* Copyright (c) 2003-2004, Roger Dingledine
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2011, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file di_ops.h
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* \brief Headers for di_ops.c
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**/
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#ifndef TOR_DI_OPS_H
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#define TOR_DI_OPS_H
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#include "orconfig.h"
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#include "torint.h"
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int tor_memcmp(const void *a, const void *b, size_t sz);
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int tor_memeq(const void *a, const void *b, size_t sz);
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#define tor_memneq(a,b,sz) (!tor_memeq((a),(b),(sz)))
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/** Alias for the platform's memcmp() function. This function is
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* <em>not</em> data-independent: we define this alias so that we can
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* mark cases where we are deliberately using a data-dependent memcmp()
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* implementation.
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*/
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#define fast_memcmp(a,b,c) (memcmp((a),(b),(c)))
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#define fast_memeq(a,b,c) (0==memcmp((a),(b),(c)))
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#define fast_memneq(a,b,c) (0!=memcmp((a),(b),(c)))
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#endif
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