| /* Declaration of functions and data types used for MD5 sum computing |
| library functions. |
| Copyright (C) 1995-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C 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. |
| |
| The GNU C 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 the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _MD5_H |
| #define _MD5_H 1 |
| |
| #include <stdio.h> |
| |
| #if defined HAVE_LIMITS_H || defined _LIBC |
| # include <limits.h> |
| #endif |
| |
| #define MD5_DIGEST_SIZE 16 |
| #define MD5_BLOCK_SIZE 64 |
| |
| /* 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 <stdint.h> |
| typedef uint32_t md5_uint32; |
| typedef uintptr_t md5_uintptr; |
| #else |
| # define UINT_MAX_32_BITS 4294967295U |
| |
| /* 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 UINT_MAX |
| # define UINT_MAX UINT_MAX_32_BITS |
| # endif |
| |
| # if UINT_MAX == UINT_MAX_32_BITS |
| typedef unsigned int md5_uint32; |
| # else |
| # if USHRT_MAX == UINT_MAX_32_BITS |
| typedef unsigned short md5_uint32; |
| # else |
| # if ULONG_MAX == UINT_MAX_32_BITS |
| typedef unsigned long md5_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 |
| /* We have to make a guess about the integer type equivalent in size |
| to pointers which should always be correct. */ |
| typedef unsigned long int md5_uintptr; |
| #endif |
| |
| /* Structure to save state of computation between the single steps. */ |
| struct md5_ctx |
| { |
| md5_uint32 A; |
| md5_uint32 B; |
| md5_uint32 C; |
| md5_uint32 D; |
| |
| md5_uint32 total[2]; |
| md5_uint32 buflen; |
| union |
| { |
| char buffer[128]; |
| md5_uint32 buffer32[32]; |
| }; |
| }; |
| |
| /* |
| * The following three functions are build up the low level used in |
| * the functions `md5_stream' and `md5_buffer'. |
| */ |
| |
| /* Initialize structure containing state of computation. |
| (RFC 1321, 3.3: Step 3) */ |
| extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW; |
| |
| /* 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 __md5_process_block (const void *buffer, size_t len, |
| struct md5_ctx *ctx) __THROW; |
| |
| /* 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 __md5_process_bytes (const void *buffer, size_t len, |
| struct md5_ctx *ctx) __THROW; |
| |
| /* Process the remaining bytes in the buffer and put result from CTX |
| in first 16 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 *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW; |
| |
| |
| /* Put result from CTX in first 16 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 *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW; |
| |
| |
| /* Compute MD5 message digest for bytes read from STREAM. The |
| resulting message digest number will be written into the 16 bytes |
| beginning at RESBLOCK. */ |
| extern int __md5_stream (FILE *stream, void *resblock) __THROW; |
| |
| /* Compute MD5 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 *__md5_buffer (const char *buffer, size_t len, |
| void *resblock) __THROW; |
| |
| #endif /* md5.h */ |