| /* md5.h - Declaration of functions and data types used for MD5 sum |
| computing library functions. |
| Copyright 1995, 1996, 2000 Free Software Foundation, Inc. |
| NOTE: The canonical source of this file is maintained with the GNU C |
| Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu. |
| |
| 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 2, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #ifndef _MD5_H |
| #define _MD5_H 1 |
| |
| #include <stdio.h> |
| |
| #if defined HAVE_LIMITS_H || _LIBC |
| # include <limits.h> |
| #endif |
| |
| /* 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 md5_uint32; |
| #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 md5_uint32; |
| # else |
| # if SHRT_MAX == INT_MAX_32_BITS |
| typedef unsigned short md5_uint32; |
| # else |
| # if LONG_MAX == INT_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 |
| #endif |
| |
| #undef __P |
| #if defined (__STDC__) && __STDC__ |
| #define __P(x) x |
| #else |
| #define __P(x) () |
| #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; |
| char buffer[128]; |
| }; |
| |
| /* |
| * 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 __P ((struct md5_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 md5_process_block __P ((const void *buffer, size_t len, |
| struct md5_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 md5_process_bytes __P ((const void *buffer, size_t len, |
| struct md5_ctx *ctx)); |
| |
| /* 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 __P ((struct md5_ctx *ctx, void *resbuf)); |
| |
| |
| /* 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 __P ((const struct md5_ctx *ctx, void *resbuf)); |
| |
| |
| /* 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 __P ((FILE *stream, void *resblock)); |
| |
| /* 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 __P ((const char *buffer, size_t len, void *resblock)); |
| |
| #endif |