/* Declarations of functions and data types used for SHA1 sum
library functions.
- Copyright (C) 2000, 2001, 2003, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2003, 2005, 2006, 2008
+ 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
#ifndef SHA1_H
# define SHA1_H 1
-# include <stdio.h>
-# include "md5.h"
+#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 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
{
- md5_uint32 A;
- md5_uint32 B;
- md5_uint32 C;
- md5_uint32 D;
- md5_uint32 E;
-
- md5_uint32 total[2];
- md5_uint32 buflen;
- char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
+ 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];
};
digest. */
extern void *sha1_buffer (const char *buffer, size_t len, void *resblock);
+#ifdef __cplusplus
+}
+#endif
+
#endif