libmicrohttpd

HTTP/1.x server C library (MHD 1.x, stable)
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mhd_sha256_wrap.h (3079B)

      1 /*
      2      This file is part of GNU libmicrohttpd
      3      Copyright (C) 2022 Evgeny Grin (Karlson2k)
      4 
      5      GNU libmicrohttpd is free software; you can redistribute it and/or
      6      modify it under the terms of the GNU Lesser General Public
      7      License as published by the Free Software Foundation; either
      8      version 2.1 of the License, or (at your option) any later version.
      9 
     10      This library is distributed in the hope that it will be useful,
     11      but WITHOUT ANY WARRANTY; without even the implied warranty of
     12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13      Lesser General Public License for more details.
     14 
     15      You should have received a copy of the GNU Lesser General Public
     16      License along with GNU libmicrohttpd.
     17      If not, see <http://www.gnu.org/licenses/>.
     18 */
     19 
     20 /**
     21  * @file microhttpd/mhd_sha256_wrap.h
     22  * @brief  Simple wrapper for selection of built-in/external SHA-256
     23  *         implementation
     24  * @author Karlson2k (Evgeny Grin)
     25  */
     26 
     27 #ifndef MHD_SHA256_WRAP_H
     28 #define MHD_SHA256_WRAP_H 1
     29 
     30 #include "mhd_options.h"
     31 #include "mhd_options.h"
     32 #ifndef MHD_SHA256_SUPPORT
     33 #error This file must be used only when SHA-256 is enabled
     34 #endif
     35 #ifndef MHD_SHA256_TLSLIB
     36 #include "sha256.h"
     37 #else  /* MHD_SHA256_TLSLIB */
     38 #include "sha256_ext.h"
     39 #endif /* MHD_SHA256_TLSLIB */
     40 
     41 #ifndef SHA256_DIGEST_SIZE
     42 /**
     43  * Size of SHA-256 resulting digest in bytes
     44  * This is the final digest size, not intermediate hash.
     45  */
     46 #define SHA256_DIGEST_SIZE (32)
     47 #endif /* ! SHA256_DIGEST_SIZE */
     48 
     49 #ifndef SHA256_DIGEST_STRING_SIZE
     50 /**
     51  * Size of MD5 digest string in chars including termination NUL.
     52  */
     53 #define SHA256_DIGEST_STRING_SIZE ((SHA256_DIGEST_SIZE) * 2 + 1)
     54 #endif /* ! SHA256_DIGEST_STRING_SIZE */
     55 
     56 #ifndef MHD_SHA256_TLSLIB
     57 /**
     58  * Universal ctx type mapped for chosen implementation
     59  */
     60 #define Sha256CtxWr Sha256Ctx
     61 #else  /* MHD_SHA256_TLSLIB */
     62 /**
     63  * Universal ctx type mapped for chosen implementation
     64  */
     65 #define Sha256CtxWr Sha256CtxExt
     66 #endif /* MHD_SHA256_TLSLIB */
     67 
     68 #ifndef MHD_SHA256_HAS_INIT_ONE_TIME
     69 /**
     70  * Setup and prepare ctx for hash calculation
     71  */
     72 #define MHD_SHA256_init_one_time(ctx) MHD_SHA256_init(ctx)
     73 #endif /* ! MHD_SHA256_HAS_INIT_ONE_TIME */
     74 
     75 #ifndef MHD_SHA256_HAS_FINISH_RESET
     76 /**
     77  * Re-use the same ctx for the new hashing after digest calculated
     78  */
     79 #define MHD_SHA256_reset(ctx) MHD_SHA256_init(ctx)
     80 /**
     81  * Finalise MD5 calculation, return digest, reset hash calculation.
     82  */
     83 #define MHD_SHA256_finish_reset(ctx,digest) MHD_SHA256_finish(ctx,digest), \
     84                                             MHD_SHA256_reset(ctx)
     85 
     86 #else  /* MHD_SHA256_HAS_FINISH_RESET */
     87 #define MHD_SHA256_reset(ctx) (void)0
     88 #endif /* MHD_SHA256_HAS_FINISH_RESET */
     89 
     90 #ifndef MHD_SHA256_HAS_DEINIT
     91 #define MHD_SHA256_deinit(ignore) (void)0
     92 #endif /* HAVE_SHA256_DEINIT */
     93 
     94 /* Sanity checks */
     95 
     96 #if ! defined(MHD_SHA256_HAS_FINISH_RESET) && ! defined(MHD_SHA256_HAS_FINISH)
     97 #error Required MHD_SHA256_finish_reset() or MHD_SHA256_finish_reset()
     98 #endif /* ! MHD_SHA256_HAS_FINISH_RESET && ! MHD_SHA256_HAS_FINISH */
     99 
    100 #endif /* MHD_SHA256_WRAP_H */