Mercurial > gnulib
view lib/hmac.c @ 40231:9b3c79fdfe0b
strtod: fix clash with strtold
Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817).
* lib/strtod.c (compute_minus_zero, minus_zero):
Simplify by remving the macro / external variable,
and having just a function. User changed. This avoids
the need for an external variable that might clash.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Mon, 11 Mar 2019 16:40:29 -0700 |
parents | b06060465f09 |
children |
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/* hmac.c -- hashed message authentication codes Copyright (C) 2005-2006, 2009-2019 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see <https://www.gnu.org/licenses/>. */ #include <string.h> #include "memxor.h" #define IPAD 0x36 #define OPAD 0x5c /* Concatenate two preprocessor tokens. */ #define _GLHMAC_CONCAT_(prefix, suffix) prefix##suffix #define _GLHMAC_CONCAT(prefix, suffix) _GLHMAC_CONCAT_ (prefix, suffix) #if GL_HMAC_NAME == 5 # define HMAC_ALG md5 #else # define HMAC_ALG _GLHMAC_CONCAT (sha, GL_HMAC_NAME) #endif #define GL_HMAC_CTX _GLHMAC_CONCAT (HMAC_ALG, _ctx) #define GL_HMAC_FN _GLHMAC_CONCAT (hmac_, HMAC_ALG) #define GL_HMAC_FN_INIT _GLHMAC_CONCAT (HMAC_ALG, _init_ctx) #define GL_HMAC_FN_BLOC _GLHMAC_CONCAT (HMAC_ALG, _process_block) #define GL_HMAC_FN_PROC _GLHMAC_CONCAT (HMAC_ALG, _process_bytes) #define GL_HMAC_FN_FINI _GLHMAC_CONCAT (HMAC_ALG, _finish_ctx) static void hmac_hash (const void *key, size_t keylen, const void *in, size_t inlen, int pad, void *resbuf) { struct GL_HMAC_CTX hmac_ctx; char block[GL_HMAC_BLOCKSIZE]; memset (block, pad, sizeof block); memxor (block, key, keylen); GL_HMAC_FN_INIT (&hmac_ctx); GL_HMAC_FN_BLOC (block, sizeof block, &hmac_ctx); GL_HMAC_FN_PROC (in, inlen, &hmac_ctx); GL_HMAC_FN_FINI (&hmac_ctx, resbuf); } int GL_HMAC_FN (const void *key, size_t keylen, const void *in, size_t inlen, void *resbuf) { char optkeybuf[GL_HMAC_HASHSIZE]; char innerhash[GL_HMAC_HASHSIZE]; /* Ensure key size is <= block size. */ if (keylen > GL_HMAC_BLOCKSIZE) { struct GL_HMAC_CTX keyhash; GL_HMAC_FN_INIT (&keyhash); GL_HMAC_FN_PROC (key, keylen, &keyhash); GL_HMAC_FN_FINI (&keyhash, optkeybuf); key = optkeybuf; /* zero padding of the key to the block size is implicit in the memxor. */ keylen = sizeof optkeybuf; } /* Compute INNERHASH from KEY and IN. */ hmac_hash (key, keylen, in, inlen, IPAD, innerhash); /* Compute result from KEY and INNERHASH. */ hmac_hash (key, keylen, innerhash, sizeof innerhash, OPAD, resbuf); return 0; }