| /* md5.h - Declaration of functions and data types used for MD5 sum |
| computing library functions. |
| Copyright (C) 1995, 1996, 1999 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef R_MD5_H |
| #define R_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 |
| # if defined __STDC__ && __STDC__ |
| # define UINT_MAX_32_BITS 4294967295U |
| # else |
| # define UINT_MAX_32_BITS 0xFFFFFFFF |
| # endif |
| |
| /* 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 |
| #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'. |
| */ |
| |
| /* 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)); |
| |
| #ifndef ROL_UNUSED |
| /* The following is from gnupg-1.0.2's cipher/bithelp.h. */ |
| /* Rotate a 32 bit integer by n bytes */ |
| #if defined __GNUC__ && defined __i386__ |
| static md5_uint32 |
| rol(md5_uint32 x, int n) |
| { |
| __asm__("roll %%cl,%0" |
| :"=r" (x) |
| :"0" (x),"c" (n)); |
| return x; |
| } |
| #else |
| # define rol(x,n) ( ((x) << (n)) | ((x) >> (32-(n))) ) |
| #endif |
| #endif |
| |
| #endif /* R_MD5_H */ |