| /* Declarations of functions and data types used for SHA1 sum |
| library functions. |
| Copyright (C) 2000, 2001, 2003, 2005, 2006, 2008, 2010 |
| 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) |
| #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. */ |
| 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]; |
| }; |
| |
| |
| /* 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 |