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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@909 72102866-910b-0410-8b05-ffd578937521

Source/md5.h

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+/* md5.h - Declaration of functions and data types used for MD5 sum
+   computing library functions.
+   Copyright (C) 1995 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 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
+
+#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.  */
+
+#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
+
+#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;
+  };
+
+/*
+ * 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)  */
+void md5_init_ctx __P ((struct md5_ctx * ctx));
+
+/* Starting with the result of former calls of this function (or the
+   initialzation function update the context for the next LEN bytes
+   starting at BUFFER.
+   It is necessary that LEN is a multiple of 64!!! */
+void md5_process_block __P ((const void *buffer, size_t len,
+			     struct md5_ctx * ctx));
+
+/* 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.  */
+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.  */
+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.  */
+void *md5_buffer __P ((const char *buffer, size_t len, void *resblock));
+
+#endif