GNU libmicrohttpd 1.0.1
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sha256_ext.c
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1/*
2 This file is part of GNU libmicrohttpd
3 Copyright (C) 2022-2023 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
26#include <gnutls/crypto.h>
27#include "sha256_ext.h"
28#include "mhd_assert.h"
29
30
38void
40{
41 ctx->handle = NULL;
42 ctx->ext_error = gnutls_hash_init (&ctx->handle, GNUTLS_DIG_SHA256);
43 if ((0 != ctx->ext_error) && (NULL != ctx->handle))
44 {
45 /* GnuTLS may return initialisation error and set the handle at the
46 same time. Such handle cannot be used for calculations.
47 Note: GnuTLS may also return an error and NOT set the handle. */
48 gnutls_free (ctx->handle);
49 ctx->handle = NULL;
50 }
51
52 /* If handle is NULL, the error must be set */
53 mhd_assert ((NULL != ctx->handle) || (0 != ctx->ext_error));
54 /* If error is set, the handle must be NULL */
55 mhd_assert ((0 == ctx->ext_error) || (NULL == ctx->handle));
56}
57
58
66void
68 const uint8_t *data,
69 size_t length)
70{
71 if (0 == ctx->ext_error)
72 ctx->ext_error = gnutls_hash (ctx->handle, data, length);
73}
74
75
82void
84 uint8_t digest[SHA256_DIGEST_SIZE])
85{
86 if (0 == ctx->ext_error)
87 gnutls_hash_output (ctx->handle, digest);
88}
89
90
96void
98{
99 if (NULL != ctx->handle)
100 gnutls_hash_deinit (ctx->handle, NULL);
101}
#define mhd_assert(CHK)
Definition mhd_assert.h:39
#define NULL
#define MHD_SHA256_deinit(ignore)
#define MHD_SHA256_init_one_time(ctx)
#define MHD_SHA256_finish_reset(ctx, digest)
macros for mhd_assert()
void * data
#define SHA256_DIGEST_SIZE
Definition sha256.h:55
void MHD_SHA256_update(struct Sha256CtxExt *ctx, const uint8_t *data, size_t length)
Definition sha256_ext.c:67
Wrapper for SHA-256 calculation performed by TLS library.
struct hash_hd_st * handle
Definition sha256_ext.h:54