Mercurial > dropbear
view libtomcrypt/src/pk/asn1/der/boolean/der_decode_boolean.c @ 1088:f2a3570b5110
Test struct existance against sizeof() operator
Instead of declaring an "unused-variable" or "unused-but-set-variable"
structure.
This avoid unexpected broken configurations when using something like:
$ ./configure CFLAGS="-Wall -Wextra -Werror"
It causes AC_COMPILE_IFELSE to fail and thus leading to a mismatch
configuration (because the CFLAGS are passed to the macro).
author | Gaël PORTAY <gael.portay@gmail.com> |
---|---|
date | Sat, 02 May 2015 13:33:34 +0200 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://libtomcrypt.com */ #include "tomcrypt.h" /** @file der_decode_boolean.c ASN.1 DER, decode a BOOLEAN, Tom St Denis */ #ifdef LTC_DER /** Read a BOOLEAN @param in The destination for the DER encoded BOOLEAN @param inlen The size of the DER BOOLEAN @param out [out] The boolean to decode @return CRYPT_OK if successful */ int der_decode_boolean(const unsigned char *in, unsigned long inlen, int *out) { LTC_ARGCHK(in != NULL); LTC_ARGCHK(out != NULL); if (inlen != 3 || in[0] != 0x01 || in[1] != 0x01 || (in[2] != 0x00 && in[2] != 0xFF)) { return CRYPT_INVALID_ARG; } *out = (in[2]==0xFF) ? 1 : 0; return CRYPT_OK; } #endif /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/boolean/der_decode_boolean.c,v $ */ /* $Revision: 1.1 $ */ /* $Date: 2006/04/22 17:01:59 $ */