diff options
Diffstat (limited to 'src/microhttpd_ws/sha1.h')
| -rw-r--r-- | src/microhttpd_ws/sha1.h | 245 |
1 files changed, 105 insertions, 140 deletions
diff --git a/src/microhttpd_ws/sha1.h b/src/microhttpd_ws/sha1.h index be0d190b..851a4429 100644 --- a/src/microhttpd_ws/sha1.h +++ b/src/microhttpd_ws/sha1.h @@ -1,145 +1,110 @@ -/* Declarations of functions and data types used for SHA1 sum - library functions. - Copyright (C) 2000-2021 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 3, 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, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ - -#ifndef SHA1_H -# define SHA1_H 1 - -#include <stdio.h> - -#if defined HAVE_LIMITS_H || _LIBC -# include <limits.h> -#endif - -/*#include "ansidecl.h"*/ - -/* The following contortions are an attempt to use the C preprocessor - to determine an unsigned integral type that is 32 bits wide. An - alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but - doing that would require that the configure script compile and *run* - the resulting executable. Locally running cross-compiled executables - is usually not possible. */ - -#ifdef _LIBC -# include <sys/types.h> -typedef u_int32_t sha1_uint32; -typedef uintptr_t sha1_uintptr; -#elif defined (HAVE_SYS_TYPES_H) && defined (HAVE_STDINT_H) +/* + This file is part of libmicrohttpd + Copyright (C) 2019-2021 Karlson2k (Evgeny Grin) + + This library 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 this library. + If not, see <http://www.gnu.org/licenses/>. +*/ + +/** + * @file microhttpd/sha1.h + * @brief Calculation of SHA-1 digest + * @author Karlson2k (Evgeny Grin) + */ + +#ifndef MHD_SHA1_H +#define MHD_SHA1_H 1 + +#include "mhd_options.h" #include <stdint.h> -#include <sys/types.h> -typedef uint32_t sha1_uint32; -typedef uintptr_t sha1_uintptr; -#else -# define INT_MAX_32_BITS 2147483647 - -/* If UINT_MAX isn't defined, assume it's a 32-bit type. - This should be valid for all systems GNU cares about because - that doesn't include 16-bit systems, and only modern systems - (that certainly have <limits.h>) have 64+-bit integral types. */ - -# ifndef INT_MAX -# define INT_MAX INT_MAX_32_BITS -# endif - -# if INT_MAX == INT_MAX_32_BITS -typedef unsigned int sha1_uint32; -# else -# if SHRT_MAX == INT_MAX_32_BITS -typedef unsigned short sha1_uint32; -# else -# if LONG_MAX == INT_MAX_32_BITS -typedef unsigned long sha1_uint32; -# else -/* The following line is intended to evoke an error. - Using #error is not portable enough. */ -"Cannot determine unsigned 32-bit data type." -# endif -# endif -# endif -#endif - -#ifdef __cplusplus -extern "C" { -#endif - -/* Structure to save state of computation between the single steps. */ +#ifdef HAVE_STDDEF_H +#include <stddef.h> /* for size_t */ +#endif /* HAVE_STDDEF_H */ + +/** + * SHA-1 digest is kept internally as 5 32-bit words. + */ +#define _SHA1_DIGEST_LENGTH 5 + +/** + * Number of bits in single SHA-1 word + */ +#define SHA1_WORD_SIZE_BITS 32 + +/** + * Number of bytes in single SHA-1 word + */ +#define SHA1_BYTES_IN_WORD (SHA1_WORD_SIZE_BITS / 8) + +/** + * Size of SHA-1 digest in bytes + */ +#define SHA1_DIGEST_SIZE (_SHA1_DIGEST_LENGTH * SHA1_BYTES_IN_WORD) + +/** + * Size of SHA-1 digest string in chars including termination NUL + */ +#define SHA1_DIGEST_STRING_SIZE ((SHA1_DIGEST_SIZE) * 2 + 1) + +/** + * Size of single processing block in bits + */ +#define SHA1_BLOCK_SIZE_BITS 512 + +/** + * Size of single processing block in bytes + */ +#define SHA1_BLOCK_SIZE (SHA1_BLOCK_SIZE_BITS / 8) + + struct sha1_ctx { - sha1_uint32 A; - sha1_uint32 B; - sha1_uint32 C; - sha1_uint32 D; - sha1_uint32 E; - - sha1_uint32 total[2]; - sha1_uint32 buflen; - sha1_uint32 buffer[32]; + uint32_t H[_SHA1_DIGEST_LENGTH]; /**< Intermediate hash value / digest at end of calculation */ + uint8_t buffer[SHA1_BLOCK_SIZE]; /**< SHA256 input data buffer */ + uint64_t count; /**< number of bytes, mod 2^64 */ }; - -/* Initialize structure containing state of computation. */ -extern void sha1_init_ctx (struct sha1_ctx *ctx); - -/* Starting with the result of former calls of this function (or the - initialization function update the context for the next LEN bytes - starting at BUFFER. - It is necessary that LEN is a multiple of 64!!! */ -extern void sha1_process_block (const void *buffer, size_t len, - struct sha1_ctx *ctx); - -/* Starting with the result of former calls of this function (or the - initialization function update the context for the next LEN bytes - starting at BUFFER. - It is NOT required that LEN is a multiple of 64. */ -extern void sha1_process_bytes (const void *buffer, size_t len, - struct sha1_ctx *ctx); - -/* Process the remaining bytes in the buffer and put result from CTX - in first 20 bytes following RESBUF. The result is always in little - endian byte order, so that a byte-wise output yields to the wanted - ASCII representation of the message digest. - - IMPORTANT: On some systems it is required that RESBUF be correctly - aligned for a 32 bits value. */ -extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf); - - -/* Put result from CTX in first 20 bytes following RESBUF. The result is - always in little endian byte order, so that a byte-wise output yields - to the wanted ASCII representation of the message digest. - - IMPORTANT: On some systems it is required that RESBUF is correctly - aligned for a 32 bits value. */ -extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf); - - -/* Compute SHA1 message digest for bytes read from STREAM. The - resulting message digest number will be written into the 20 bytes - beginning at RESBLOCK. */ -extern int sha1_stream (FILE *stream, void *resblock); - -/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The - result is always in little endian byte order, so that a byte-wise - output yields to the wanted ASCII representation of the message - digest. */ -extern void *sha1_buffer (const char *buffer, size_t len, void *resblock); - -#ifdef __cplusplus -} -#endif - -#endif +/** + * Initialise structure for SHA-1 calculation. + * + * @param ctx must be a `struct sha1_ctx *` + */ +void +MHD_SHA1_init (void *ctx_); + + +/** + * Process portion of bytes. + * + * @param ctx_ must be a `struct sha1_ctx *` + * @param data bytes to add to hash + * @param length number of bytes in @a data + */ +void +MHD_SHA1_update (void *ctx_, + const uint8_t *data, + size_t length); + + +/** + * Finalise SHA-1 calculation, return digest. + * + * @param ctx_ must be a `struct sha1_ctx *` + * @param[out] digest set to the hash, must be #SHA1_DIGEST_SIZE bytes + */ +void +MHD_SHA1_finish (void *ctx_, + uint8_t digest[SHA1_DIGEST_SIZE]); + +#endif /* MHD_SHA1_H */ |