Merge pull request #52 from sinetek/md5

md5 - sync with FreeBSD 2.0.
2015-07-04 16:44:58 -07:00
parent 75470f1ac5 6504a97fd1
commit 694c364cb4
8 changed files with 691 additions and 1 deletions
--- a/rootfs.manifest
+++ b/rootfs.manifest
@@ -482,6 +482,7 @@ file /bin/mail
 mode 04755
 file /bin/make
 file /bin/man
+file /bin/md5
 file /bin/med
 file /bin/mesg
 file /bin/mkdir
@@ -1181,6 +1182,7 @@ file /share/man/cat1/m4.0
 file /share/man/cat1/mail.0
 file /share/man/cat1/make.0
 file /share/man/cat1/man.0
+file /share/man/cat1/md5.0
 file /share/man/cat1/mesg.0
 file /share/man/cat1/mkdep.0
 file /share/man/cat1/mkdir.0
--- a/src/cmd/Makefile
+++ b/src/cmd/Makefile
@@ -12,7 +12,7 @@ CFLAGS          += -Werror
 # /bin
 SUBDIR		= adb adc-demo aout ar as awk basic cc chflags chpass \
                  cpp dc diff emg env fdisk find forth fstat glcdtest \
-                  hostname id la lcc lcpp ld ls login make man med \
+                  hostname id la lcc lcpp ld ls login make man md5 med \
                  more nm passwd picoc portio printf pwm \
                  ranlib re renice retroforth scm setty sl \
                  sed sh smallc smlrc stty sysctl test uname wiznet xargs \
--- a/src/cmd/md5/Makefile
+++ b/src/cmd/md5/Makefile
@@ -0,0 +1,32 @@
+#==========================================
+#    Makefile: makefile for md5
+#	Copyright 1993,1998 Toyoda Masashi
+#		(toyoda@is.titech.ac.jp)
+#	Last Modified: 1998/ 7/22
+#==========================================
+
+TOPSRC          = $(shell cd ../../..; pwd)
+include $(TOPSRC)/target.mk
+
+OBJS            = md5.o md5c.o
+SRCS            = md5.c md5c.c
+MAN		= md5.0
+MANSRC		= md5.1
+
+all:            md5 $(MAN)
+
+md5:             ${OBJS}
+		${CC} ${LDFLAGS} -o md5.elf ${OBJS} ${LIBS}
+		${OBJDUMP} -S md5.elf > md5.dis
+		${SIZE} md5.elf
+		${ELF2AOUT} md5.elf $@ && rm md5.elf
+
+$(MAN):         ${MANSRC}
+		${MANROFF} ${MANSRC} > ${MAN}
+
+clean:
+		-rm -f md5 ${OBJS} ${MAN} md5.elf md5.dis
+
+install:        all
+		install md5 $(DESTDIR)/bin/
+		cp $(MAN) $(DESTDIR)/share/man/cat1
--- a/src/cmd/md5/global.h
+++ b/src/cmd/md5/global.h
@@ -0,0 +1,30 @@
+/* GLOBAL.H - RSAREF types and constants
+ */
+
+/* PROTOTYPES should be set to one if and only if the compiler supports
+  function argument prototyping.
+The following makes PROTOTYPES default to 0 if it has not already
+  been defined with C compiler flags.
+ */
+#ifndef PROTOTYPES
+#define PROTOTYPES 0
+#endif
+
+/* POINTER defines a generic pointer type */
+typedef unsigned char *POINTER;
+
+/* UINT2 defines a two byte word */
+typedef unsigned short int UINT2;
+
+/* UINT4 defines a four byte word */
+typedef unsigned long int UINT4;
+
+/* PROTO_LIST is defined depending on how PROTOTYPES is defined above.
+If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it
+  returns an empty list.
+ */
+#if PROTOTYPES
+#define PROTO_LIST(list) list
+#else
+#define PROTO_LIST(list) ()
+#endif
--- a/src/cmd/md5/md5.1
+++ b/src/cmd/md5/md5.1
@@ -0,0 +1,43 @@
+.TH MD5 1 "Feb 14, 1994"
+.SH NAME
+md5 \- calculate a message-digest fingerprint (checksum) for a file
+.SH SYNOPSIS
+.B md5
+[ -t | -x | -sstring | filename(s) ]
+.SH DESCRIPTION
+.B md5
+takes as input a message of arbitrary length and produces
+as output a 128-bit "fingerprint" or "message digest" of the input.
+It is conjectured that it is computationally infeasible to produce
+two messages having the same message digest, or to produce any
+message having a given prespecified target message digest.
+The MD5 algorithm is intended for digital signature applications, where a
+large file must be "compressed" in a secure manner before being
+encrypted with a private (secret) key under a public-key cryptosystem
+such as
+.I RSA.
+.SH OPTIONS
+The following four options may be used in any combination, except
+that
+.B "filename(s)"
+must be the last objects on the command line.
+.in +5
+.PP
+.B -sstring
+prints a checksum of the given "string".
+.PP
+.B -t
+runs a built-in time trial.
+.PP
+.B -x
+runs a built-in test script.
+.PP
+.B filename(s)
+prints a checksum(s) for each of the files.
+.SH "SEE ALSO"
+.BR sum (1)
+.PP
+RFC 1321 describes in detail the MD2, MD4, and MD5 message-digest algorithms.
+.SH ACKNOWLEDGEMENTS
+This program is placed in the public domain for free general use by
+RSA Data Security.
--- a/src/cmd/md5/md5.c
+++ b/src/cmd/md5/md5.c
@@ -0,0 +1,231 @@
+/* MDDRIVER.C - test driver for MD2, MD4 and MD5
+ */
+
+/* Copyright (C) 1990-2, RSA Data Security, Inc. Created 1990. All
+rights reserved.
+
+RSA Data Security, Inc. makes no representations concerning either
+the merchantability of this software or the suitability of this
+software for any particular purpose. It is provided "as is"
+without express or implied warranty of any kind.
+
+These notices must be retained in any copies of any part of this
+documentation and/or software.
+ */
+
+/* The following makes MD default to MD5 if it has not already been
+  defined with C compiler flags.
+ */
+#ifndef MD
+#define MD 5
+#endif
+
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+#include "global.h"
+#if MD == 2
+#include "md2.h"
+#endif
+#if MD == 4
+#include "md4.h"
+#endif
+#if MD == 5
+#include "md5.h"
+#endif
+
+/* Length of test block, number of test blocks.
+ */
+#define TEST_BLOCK_LEN 1000
+#define TEST_BLOCK_COUNT 1000
+
+static void MDString PROTO_LIST ((char *));
+static void MDTimeTrial PROTO_LIST ((void));
+static void MDTestSuite PROTO_LIST ((void));
+static void MDFile PROTO_LIST ((char *));
+static void MDFilter PROTO_LIST ((void));
+static void MDPrint PROTO_LIST ((unsigned char [16]));
+
+#if MD == 2
+#define MD_CTX MD2_CTX
+#define MDInit MD2Init
+#define MDUpdate MD2Update
+#define MDFinal MD2Final
+#endif
+#if MD == 4
+#define MD_CTX MD4_CTX
+#define MDInit MD4Init
+#define MDUpdate MD4Update
+#define MDFinal MD4Final
+#endif
+#if MD == 5
+#define MD_CTX MD5_CTX
+#define MDInit MD5Init
+#define MDUpdate MD5Update
+#define MDFinal MD5Final
+#endif
+
+/* Main driver.
+
+Arguments (may be any combination):
+  -sstring - digests string
+  -t       - runs time trial
+  -x       - runs test script
+  filename - digests file
+  (none)   - digests standard input
+ */
+int main (argc, argv)
+int argc;
+char *argv[];
+{
+  int i;
+
+  if (argc > 1)
+ for (i = 1; i < argc; i++)
+   if (argv[i][0] == '-' && argv[i][1] == 's')
+     MDString (argv[i] + 2);
+   else if (strcmp (argv[i], "-t") == 0)
+     MDTimeTrial ();
+   else if (strcmp (argv[i], "-x") == 0)
+     MDTestSuite ();
+   else
+     MDFile (argv[i]);
+  else
+ MDFilter ();
+
+  return (0);
+}
+
+/* Digests a string and prints the result.
+ */
+static void MDString (string)
+char *string;
+{
+  MD_CTX context;
+  unsigned char digest[16];
+  unsigned int len = strlen (string);
+
+  MDInit (&context);
+  MDUpdate (&context, string, len);
+  MDFinal (digest, &context);
+
+  printf ("MD%d (\"%s\") = ", MD, string);
+  MDPrint (digest);
+  printf ("\n");
+}
+
+/* Measures the time to digest TEST_BLOCK_COUNT TEST_BLOCK_LEN-byte
+  blocks.
+ */
+static void MDTimeTrial ()
+{
+  MD_CTX context;
+  time_t endTime, startTime;
+  unsigned char block[TEST_BLOCK_LEN], digest[16];
+  unsigned int i;
+
+  printf
+ ("MD%d time trial. Digesting %d %d-byte blocks ...", MD,
+  TEST_BLOCK_LEN, TEST_BLOCK_COUNT);
+
+  /* Initialize block */
+  for (i = 0; i < TEST_BLOCK_LEN; i++)
+ block[i] = (unsigned char)(i & 0xff);
+
+  /* Start timer */
+  time (&startTime);
+
+  /* Digest blocks */
+  MDInit (&context);
+  for (i = 0; i < TEST_BLOCK_COUNT; i++)
+ MDUpdate (&context, block, TEST_BLOCK_LEN);
+  MDFinal (digest, &context);
+
+  /* Stop timer */
+  time (&endTime);
+
+  printf (" done\n");
+  printf ("Digest = ");
+  MDPrint (digest);
+  printf ("\nTime = %ld seconds\n", (long)(endTime-startTime));
+  /*
+   * Be careful that endTime-startTime is not zero.
+   * (Bug fix from Ric Anderson, ric@Artisoft.COM.)
+   */
+  printf
+ ("Speed = %ld bytes/second\n",
+  (long)TEST_BLOCK_LEN * (long)TEST_BLOCK_COUNT/((endTime-startTime) != 0 ? (endTime-startTime):1));
+}
+
+/* Digests a reference suite of strings and prints the results.
+ */
+static void MDTestSuite ()
+{
+  printf ("MD%d test suite:\n", MD);
+
+  MDString ("");
+  MDString ("a");
+  MDString ("abc");
+  MDString ("message digest");
+  MDString ("abcdefghijklmnopqrstuvwxyz");
+  MDString
+ ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
+  MDString
+ ("1234567890123456789012345678901234567890\
+1234567890123456789012345678901234567890");
+}
+
+/* Digests a file and prints the result.
+ */
+static void MDFile (filename)
+char *filename;
+{
+  FILE *file;
+  MD_CTX context;
+  int len;
+  unsigned char buffer[1024], digest[16];
+
+  if ((file = fopen (filename, "rb")) == NULL)
+ printf ("%s can't be opened\n", filename);
+
+  else {
+ MDInit (&context);
+ while (len = fread (buffer, 1, 1024, file))
+   MDUpdate (&context, buffer, len);
+ MDFinal (digest, &context);
+
+ fclose (file);
+
+ printf ("MD%d (%s) = ", MD, filename);
+ MDPrint (digest);
+ printf ("\n");
+  }
+}
+
+/* Digests the standard input and prints the result.
+ */
+static void MDFilter ()
+{
+  MD_CTX context;
+  int len;
+  unsigned char buffer[16], digest[16];
+
+  MDInit (&context);
+  while (len = fread (buffer, 1, 16, stdin))
+ MDUpdate (&context, buffer, len);
+  MDFinal (digest, &context);
+
+  MDPrint (digest);
+  printf ("\n");
+}
+
+/* Prints a message digest in hexadecimal.
+ */
+static void MDPrint (digest)
+unsigned char digest[16];
+{
+  unsigned int i;
+
+  for (i = 0; i < 16; i++)
+ printf ("%02x", digest[i]);
+}
--- a/src/cmd/md5/md5.h
+++ b/src/cmd/md5/md5.h
@@ -0,0 +1,42 @@
+/* MD5.H - header file for MD5C.C
+ * $FreeBSD$
+ */
+
+/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
+rights reserved.
+
+License to copy and use this software is granted provided that it
+is identified as the "RSA Data Security, Inc. MD5 Message-Digest
+Algorithm" in all material mentioning or referencing this software
+or this function.
+
+License is also granted to make and use derivative works provided
+that such works are identified as "derived from the RSA Data
+Security, Inc. MD5 Message-Digest Algorithm" in all material
+mentioning or referencing the derived work.
+
+RSA Data Security, Inc. makes no representations concerning either
+the merchantability of this software or the suitability of this
+software for any particular purpose. It is provided "as is"
+without express or implied warranty of any kind.
+
+These notices must be retained in any copies of any part of this
+documentation and/or software.
+ */
+
+#ifndef _MD5_H_
+#define _MD5_H_
+/* MD5 context. */
+typedef struct {
+  unsigned long state[4];	/* state (ABCD) */
+  unsigned long count[2];	/* number of bits, modulo 2^64 (lsb first) */
+  unsigned char buffer[64];	/* input buffer */
+} MD5_CTX;
+
+void   MD5Init (MD5_CTX *);
+void   MD5Update (MD5_CTX *, const unsigned char *, unsigned int);
+void   MD5Final (unsigned char [16], MD5_CTX *);
+char * MD5End(MD5_CTX *);
+char * MD5File(char *);
+char * MD5Data(const unsigned char *, unsigned int);
+#endif /* _MD5_H_ */
--- a/src/cmd/md5/md5c.c
+++ b/src/cmd/md5/md5c.c
@@ -0,0 +1,310 @@
+/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
+ * $FreeBSD$
+ */
+
+/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
+rights reserved.
+
+License to copy and use this software is granted provided that it
+is identified as the "RSA Data Security, Inc. MD5 Message-Digest
+Algorithm" in all material mentioning or referencing this software
+or this function.
+
+License is also granted to make and use derivative works provided
+that such works are identified as "derived from the RSA Data
+Security, Inc. MD5 Message-Digest Algorithm" in all material
+mentioning or referencing the derived work.
+
+RSA Data Security, Inc. makes no representations concerning either
+the merchantability of this software or the suitability of this
+software for any particular purpose. It is provided "as is"
+without express or implied warranty of any kind.
+
+These notices must be retained in any copies of any part of this
+documentation and/or software.
+ */
+
+#include "md5.h"
+
+typedef unsigned char *POINTER;
+typedef unsigned short int UINT2;
+typedef unsigned long int UINT4;
+
+#define PROTO_LIST(list) list
+
+/* Constants for MD5Transform routine.
+ */
+#define S11 7
+#define S12 12
+#define S13 17
+#define S14 22
+#define S21 5
+#define S22 9
+#define S23 14
+#define S24 20
+#define S31 4
+#define S32 11
+#define S33 16
+#define S34 23
+#define S41 6
+#define S42 10
+#define S43 15
+#define S44 21
+
+static void MD5Transform PROTO_LIST ((UINT4 [4], const unsigned char [64]));
+static void Encode PROTO_LIST
+  ((unsigned char *, UINT4 *, unsigned int));
+static void Decode PROTO_LIST
+  ((UINT4 *, const unsigned char *, unsigned int));
+
+static unsigned char PADDING[64] = {
+  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/* F, G, H and I are basic MD5 functions.
+ */
+#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | (~z)))
+
+/* ROTATE_LEFT rotates x left n bits.
+ */
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+
+/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
+Rotation is separate from addition to prevent recomputation.
+ */
+#define FF(a, b, c, d, x, s, ac) { \
+ (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define GG(a, b, c, d, x, s, ac) { \
+ (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define HH(a, b, c, d, x, s, ac) { \
+ (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+#define II(a, b, c, d, x, s, ac) { \
+ (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
+ (a) = ROTATE_LEFT ((a), (s)); \
+ (a) += (b); \
+  }
+
+/* MD5 initialization. Begins an MD5 operation, writing a new context.
+ */
+void MD5Init (context)
+MD5_CTX *context;                                        /* context */
+{
+  context->count[0] = context->count[1] = 0;
+  /* Load magic initialization constants.
+*/
+  context->state[0] = 0x67452301;
+  context->state[1] = 0xefcdab89;
+  context->state[2] = 0x98badcfe;
+  context->state[3] = 0x10325476;
+}
+
+/* MD5 block update operation. Continues an MD5 message-digest
+  operation, processing another message block, and updating the
+  context.
+ */
+void MD5Update (context, input, inputLen)
+MD5_CTX *context;                                        /* context */
+const unsigned char *input;                                /* input block */
+unsigned int inputLen;                     /* length of input block */
+{
+  unsigned int i, index, partLen;
+
+  /* Compute number of bytes mod 64 */
+  index = (unsigned int)((context->count[0] >> 3) & 0x3F);
+
+  /* Update number of bits */
+  if ((context->count[0] += ((UINT4)inputLen << 3))
+   < ((UINT4)inputLen << 3))
+ context->count[1]++;
+  context->count[1] += ((UINT4)inputLen >> 29);
+
+  partLen = 64 - index;
+
+  /* Transform as many times as possible.
+*/
+  if (inputLen >= partLen) {
+ memcpy
+   ((POINTER)&context->buffer[index], (POINTER)input, partLen);
+ MD5Transform (context->state, context->buffer);
+
+ for (i = partLen; i + 63 < inputLen; i += 64)
+   MD5Transform (context->state, &input[i]);
+
+ index = 0;
+  }
+  else
+ i = 0;
+
+  /* Buffer remaining input */
+  memcpy
+ ((POINTER)&context->buffer[index], (POINTER)&input[i],
+  inputLen-i);
+}
+
+/* MD5 finalization. Ends an MD5 message-digest operation, writing the
+  the message digest and zeroizing the context.
+ */
+void MD5Final (digest, context)
+unsigned char digest[16];                         /* message digest */
+MD5_CTX *context;                                       /* context */
+{
+  unsigned char bits[8];
+  unsigned int index, padLen;
+
+  /* Save number of bits */
+  Encode (bits, context->count, 8);
+
+  /* Pad out to 56 mod 64.
+*/
+  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
+  padLen = (index < 56) ? (56 - index) : (120 - index);
+  MD5Update (context, PADDING, padLen);
+
+  /* Append length (before padding) */
+  MD5Update (context, bits, 8);
+  /* Store state in digest */
+  Encode (digest, context->state, 16);
+
+  /* Zeroize sensitive information.
+*/
+  memset ((POINTER)context, 0, sizeof (*context));
+}
+
+/* MD5 basic transformation. Transforms state based on block.
+ */
+static void MD5Transform (state, block)
+UINT4 state[4];
+const unsigned char block[64];
+{
+  UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
+
+  Decode (x, block, 64);
+
+  /* Round 1 */
+  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
+  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
+  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
+  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
+  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
+  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
+  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
+  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
+  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
+  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
+  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
+  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
+  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
+  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
+  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
+  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
+
+ /* Round 2 */
+  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
+  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
+  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
+  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
+  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
+  GG (d, a, b, c, x[10], S22,  0x2441453); /* 22 */
+  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
+  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
+  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
+  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
+  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
+  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
+  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
+  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
+  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
+  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
+
+  /* Round 3 */
+  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
+  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
+  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
+  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
+  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
+  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
+  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
+  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
+  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
+  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
+  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
+  HH (b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
+  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
+  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
+  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
+  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
+
+  /* Round 4 */
+  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
+  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
+  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
+  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
+  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
+  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
+  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
+  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
+  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
+  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
+  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
+  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
+  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
+  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
+  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
+  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
+
+  state[0] += a;
+  state[1] += b;
+  state[2] += c;
+  state[3] += d;
+
+  /* Zeroize sensitive information.
+*/
+  memset ((POINTER)x, 0, sizeof (x));
+}
+
+/* Encodes input (UINT4) into output (unsigned char). Assumes len is
+  a multiple of 4.
+ */
+static void Encode (output, input, len)
+unsigned char *output;
+UINT4 *input;
+unsigned int len;
+{
+  unsigned int i, j;
+
+  for (i = 0, j = 0; j < len; i++, j += 4) {
+ output[j] = (unsigned char)(input[i] & 0xff);
+ output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
+ output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
+ output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
+  }
+}
+
+/* Decodes input (unsigned char) into output (UINT4). Assumes len is
+  a multiple of 4.
+ */
+static void Decode (output, input, len)
+UINT4 *output;
+const unsigned char *input;
+unsigned int len;
+{
+  unsigned int i, j;
+
+  for (i = 0, j = 0; j < len; i++, j += 4)
+ output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
+   (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
+}