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authorJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
commit6e9c41a892ed0e0da326e0278b3221ce3f5713b8 (patch)
tree2e301d871bbeeb44aa57ff9cc070fcf3be484487 /include/md5.h
Initial import of sane-backends version 1.0.24-1.2
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diff --git a/include/md5.h b/include/md5.h
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+/* Declaration of functions and data types used for MD5 sum computing
+ library functions.
+ Copyright (C) 1995,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; 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 <stdint.h>
+typedef uint32_t md5_uint32;
+typedef uintptr_t md5_uintptr;
+#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
+/* We have to make a guess about the integer type equivalent in size
+ to pointers which should always be correct. */
+typedef unsigned long int md5_uintptr;
+#endif
+
+#undef __P
+#if defined (__STDC__) && __STDC__
+# define __P(x) x
+#else
+# define __P(x) ()
+#endif
+
+#define __md5_buffer md5_buffer
+
+#if defined __GNUC__
+#define ALIGN __attribute__ ((__aligned__ (4)))
+#else
+#define ALIGN
+#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] ALIGN;
+};
+
+/*
+ * 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 /* md5.h */