libmicrohttpd2

HTTP server C library (MHD 2.x, alpha)
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sha512_256_openssl.c (4302B)

      1 /* SPDX-License-Identifier: LGPL-2.1-or-later OR (GPL-2.0-or-later WITH eCos-exception-2.0) */
      2 /*
      3   This file is part of GNU libmicrohttpd.
      4   Copyright (C) 2026 Evgeny Grin (Karlson2k)
      5   Copyright (C) 2025 Christian Grothoff
      6 
      7   GNU libmicrohttpd is free software; you can redistribute it and/or
      8   modify it under the terms of the GNU Lesser General Public
      9   License as published by the Free Software Foundation; either
     10   version 2.1 of the License, or (at your option) any later version.
     11 
     12   GNU libmicrohttpd is distributed in the hope that it will be useful,
     13   but WITHOUT ANY WARRANTY; without even the implied warranty of
     14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15   Lesser General Public License for more details.
     16 
     17   Alternatively, you can redistribute GNU libmicrohttpd and/or
     18   modify it under the terms of the GNU General Public License as
     19   published by the Free Software Foundation; either version 2 of
     20   the License, or (at your option) any later version, together
     21   with the eCos exception, as follows:
     22 
     23     As a special exception, if other files instantiate templates or
     24     use macros or inline functions from this file, or you compile this
     25     file and link it with other works to produce a work based on this
     26     file, this file does not by itself cause the resulting work to be
     27     covered by the GNU General Public License. However the source code
     28     for this file must still be made available in accordance with
     29     section (3) of the GNU General Public License v2.
     30 
     31     This exception does not invalidate any other reasons why a work
     32     based on this file might be covered by the GNU General Public
     33     License.
     34 
     35   You should have received copies of the GNU Lesser General Public
     36   License and the GNU General Public License along with this library;
     37   if not, see <https://www.gnu.org/licenses/>.
     38 */
     39 
     40 /**
     41  * @file src/mhd2/sha512_256_openssl.c
     42  * @brief  Wrapper for SHA-512/256 calculation performed by OpenSSL backend
     43  * @author Karlson2k (Evgeny Grin)
     44  * @author Christian Grothoff
     45  */
     46 
     47 #include "mhd_sys_options.h"
     48 
     49 #include "mhd_assert.h"
     50 
     51 #include <openssl/evp.h>
     52 
     53 #include "sha512_256_openssl.h"
     54 
     55 
     56 MHD_INTERNAL MHD_FN_PAR_NONNULL_ALL_ MHD_FN_PAR_OUT_ (1) void
     57 mhd_SHA512_256_ossl_init (struct mhd_Sha512_256CtxOssl *ctx)
     58 {
     59   ctx->ossl_ctx = EVP_MD_CTX_new ();
     60   ctx->ext_error = (NULL == ctx->ossl_ctx);
     61 
     62   mhd_SHA512_256_ossl_reset (ctx);
     63 }
     64 
     65 
     66 MHD_INTERNAL MHD_FN_PAR_NONNULL_ALL_ MHD_FN_PAR_INOUT_ (1) void
     67 mhd_SHA512_256_ossl_reset (struct mhd_Sha512_256CtxOssl *ctx)
     68 {
     69   if (ctx->ext_error)
     70     return;
     71 
     72   mhd_assert (NULL != ctx->ossl_ctx);
     73 
     74   ctx->ext_error = (0 == EVP_DigestInit_ex (ctx->ossl_ctx,
     75                                             EVP_sha512_256 (),
     76                                             NULL));
     77 }
     78 
     79 
     80 MHD_INTERNAL MHD_FN_PAR_NONNULL_ALL_ MHD_FN_PAR_INOUT_ (1)
     81 MHD_FN_PAR_IN_SIZE_ (3, 2) void
     82 mhd_SHA512_256_ossl_update (struct mhd_Sha512_256CtxOssl *restrict ctx,
     83                             size_t size,
     84                             const void *restrict data)
     85 {
     86 #ifndef MHD_UNIT_TESTING
     87   mhd_assert (0 != size);
     88 #endif
     89 
     90   if (ctx->ext_error)
     91     return;
     92 
     93   mhd_assert (NULL != ctx->ossl_ctx);
     94 
     95   ctx->ext_error = (0 == EVP_DigestUpdate (ctx->ossl_ctx,
     96                                            data,
     97                                            size));
     98 }
     99 
    100 
    101 MHD_INTERNAL MHD_FN_PAR_NONNULL_ALL_ MHD_FN_PAR_INOUT_ (1)
    102 MHD_FN_PAR_OUT_ (2) void
    103 mhd_SHA512_256_ossl_finish (
    104   struct mhd_Sha512_256CtxOssl *restrict ctx,
    105   uint8_t digest[MHD_FN_PAR_FIX_ARR_SIZE_ (mhd_SHA512_256_DIGEST_SIZE)])
    106 {
    107   if (!ctx->ext_error)
    108   {
    109 #ifndef NDEBUG
    110     unsigned int len;
    111 
    112     mhd_assert (NULL != ctx->ossl_ctx);
    113 
    114     ctx->ext_error = (0 == EVP_DigestFinal_ex (ctx->ossl_ctx,
    115                                                digest,
    116                                                &len));
    117     mhd_assert ((ctx->ext_error) || (mhd_SHA512_256_DIGEST_SIZE == len));
    118 #else
    119     ctx->ext_error = (0 == EVP_DigestFinal_ex (ctx->ossl_ctx,
    120                                                digest,
    121                                                NULL));
    122 #endif
    123   }
    124 }
    125 
    126 
    127 MHD_INTERNAL MHD_FN_PAR_NONNULL_ALL_ MHD_FN_PAR_INOUT_ (1) void
    128 mhd_SHA512_256_ossl_deinit (struct mhd_Sha512_256CtxOssl *ctx)
    129 {
    130   EVP_MD_CTX_free (ctx->ossl_ctx);
    131   ctx->ossl_ctx = NULL;
    132 }