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authorChristopher Faylor <me+cygwin@cgf.cx>2000-09-08 01:03:08 +0000
committerChristopher Faylor <me+cygwin@cgf.cx>2000-09-08 01:03:08 +0000
commit3e9907faeac787b6accddee40b9c9b3b7ec488a2 (patch)
tree7583e1ea64430da6cbfb66fa0d6109a7b40ab720 /include/md5.h
parent5d64ca4ed33354b1d1f9b8793cf1858fc2a06efa (diff)
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* md5.h (md5_uint32): Choose via INT_MAX instead of UINT_MAX.
* md5.h: New file.
Diffstat (limited to 'include/md5.h')
-rw-r--r--include/md5.h142
1 files changed, 142 insertions, 0 deletions
diff --git a/include/md5.h b/include/md5.h
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+++ b/include/md5.h
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+/* md5.h - Declaration of functions and data types used for MD5 sum
+ computing library functions.
+ Copyright (C) 1995, 1996 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., 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 <sys/types.h>
+typedef u_int32_t md5_uint32;
+#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 md5_uint32;
+# else
+# if SHRT_MAX == INT_MAX_32_BITS
+ typedef unsigned short md5_uint32;
+# else
+# if LONG_MAX == INT_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'.
+ */
+
+/* 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