| /* |
| This file is part of GNU libmicrohttpd |
| Copyright (C) 2022 Evgeny Grin (Karlson2k) |
| |
| GNU libmicrohttpd is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with GNU libmicrohttpd. |
| If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /** |
| * @file microhttpd/sha256_ext.h |
| * @brief Wrapper declarations for SHA-256 calculation performed by TLS library |
| * @author Karlson2k (Evgeny Grin) |
| */ |
| |
| #ifndef MHD_SHA256_EXT_H |
| #define MHD_SHA256_EXT_H 1 |
| |
| #include "mhd_options.h" |
| #include <stdint.h> |
| #ifdef HAVE_STDDEF_H |
| #include <stddef.h> /* for size_t */ |
| #endif /* HAVE_STDDEF_H */ |
| |
| /** |
| * Size of SHA-256 resulting digest in bytes |
| * This is the final digest size, not intermediate hash. |
| */ |
| #define SHA256_DIGEST_SIZE (32) |
| |
| /* Actual declaration is in GnuTLS lib header */ |
| struct hash_hd_st; |
| |
| /** |
| * Indicates that struct Sha256CtxExt has 'ext_error' |
| */ |
| #define MHD_SHA256_HAS_EXT_ERROR 1 |
| |
| /** |
| * SHA-256 calculation context |
| */ |
| struct Sha256CtxExt |
| { |
| struct hash_hd_st *handle; /**< Hash calculation handle */ |
| int ext_error; /**< Non-zero if external error occurs during init or hashing */ |
| }; |
| |
| /** |
| * Indicates that MHD_SHA256_init_one_time() function is present. |
| */ |
| #define MHD_SHA256_HAS_INIT_ONE_TIME 1 |
| |
| /** |
| * Initialise structure for SHA-256 calculation, allocate resources. |
| * |
| * This function must not be called more than one time for @a ctx. |
| * |
| * @param ctx the calculation context |
| */ |
| void |
| MHD_SHA256_init_one_time (struct Sha256CtxExt *ctx); |
| |
| |
| /** |
| * SHA-256 process portion of bytes. |
| * |
| * @param ctx the calculation context |
| * @param data bytes to add to hash |
| * @param length number of bytes in @a data |
| */ |
| void |
| MHD_SHA256_update (struct Sha256CtxExt *ctx, |
| const uint8_t *data, |
| size_t length); |
| |
| |
| /** |
| * Indicates that MHD_SHA256_finish_reset() function is available |
| */ |
| #define MHD_SHA256_HAS_FINISH_RESET 1 |
| |
| /** |
| * Finalise SHA-256 calculation, return digest, reset hash calculation. |
| * |
| * @param ctx the calculation context |
| * @param[out] digest set to the hash, must be #SHA256_DIGEST_SIZE bytes |
| */ |
| void |
| MHD_SHA256_finish_reset (struct Sha256CtxExt *ctx, |
| uint8_t digest[SHA256_DIGEST_SIZE]); |
| |
| /** |
| * Indicates that MHD_SHA256_deinit() function is present |
| */ |
| #define MHD_SHA256_HAS_DEINIT 1 |
| |
| /** |
| * Free allocated resources. |
| * |
| * @param ctx the calculation context |
| */ |
| void |
| MHD_SHA256_deinit (struct Sha256CtxExt *ctx); |
| |
| #endif /* MHD_SHA256_EXT_H */ |