install-reloc: Support multi-binary installation.

[gnulib.git] / lib / md5.c

diff --git a/lib/md5.c b/lib/md5.c
index 8114795..c41538c 100644 (file)
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -1,11 +1,13 @@
-/* md5.c - Functions to compute MD5 message digest of files or memory blocks
+/* Functions to compute MD5 message digest of files or memory blocks.

    according to the definition of MD5 in RFC 1321 from April 1992.
    according to the definition of MD5 in RFC 1321 from April 1992.

-   Copyright (C) 1995 Software Foundation, Inc.
+   Copyright (C) 1995-1997, 1999-2001, 2005-2006, 2008-2013 Free Software
+   Foundation, Inc.
+   This file is part of the GNU C Library.

 
 

-   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 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
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of


@@ -13,35 +15,51 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   along with this program; if not, see <http://www.gnu.org/licenses/>.  */

 
 

-/* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>.  */
+/* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.  */

 
 

-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
+
+#include "md5.h"

 
 

+#include <stdalign.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>

 #include <sys/types.h>
 
 #include <sys/types.h>
 

-#if STDC_HEADERS
-# include <stdlib.h>
-# include <string.h>
-#else
-# ifndef HAVE_MEMCPY
-#  define memcpy(d, s, n) bcopy ((s), (d), (n))
-# endif
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"

 #endif
 
 #endif
 

-#include "md5.h"
+#ifdef _LIBC
+# include <endian.h>
+# if __BYTE_ORDER == __BIG_ENDIAN
+#  define WORDS_BIGENDIAN 1
+# endif
+/* We need to keep the namespace clean so define the MD5 function
+   protected using leading __ .  */
+# define md5_init_ctx __md5_init_ctx
+# define md5_process_block __md5_process_block
+# define md5_process_bytes __md5_process_bytes
+# define md5_finish_ctx __md5_finish_ctx
+# define md5_read_ctx __md5_read_ctx
+# define md5_stream __md5_stream
+# define md5_buffer __md5_buffer
+#endif

 
 #ifdef WORDS_BIGENDIAN
 
 #ifdef WORDS_BIGENDIAN

-# define SWAP(n)                                                       \
+# define SWAP(n)                                                        \

     (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
 #else
 # define SWAP(n) (n)
 #endif
 
     (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
 #else
 # define SWAP(n) (n)
 #endif
 

+#define BLOCKSIZE 32768
+#if BLOCKSIZE % 64 != 0
+# error "invalid BLOCKSIZE"
+#endif

 
 /* This array contains the bytes used to pad the buffer to the next
    64-byte boundary.  (RFC 1321, 3.1: Step 1)  */
 
 /* This array contains the bytes used to pad the buffer to the next
    64-byte boundary.  (RFC 1321, 3.1: Step 1)  */


@@ -51,109 +69,136 @@ static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ...  */ };
 /* Initialize structure containing state of computation.
    (RFC 1321, 3.3: Step 3)  */
 void
 /* Initialize structure containing state of computation.
    (RFC 1321, 3.3: Step 3)  */
 void

-md5_init_ctx (ctx)
-     struct md5_ctx *ctx;
+md5_init_ctx (struct md5_ctx *ctx)

 {
   ctx->A = 0x67452301;
   ctx->B = 0xefcdab89;
   ctx->C = 0x98badcfe;
   ctx->D = 0x10325476;
 {
   ctx->A = 0x67452301;
   ctx->B = 0xefcdab89;
   ctx->C = 0x98badcfe;
   ctx->D = 0x10325476;

+
+  ctx->total[0] = ctx->total[1] = 0;
+  ctx->buflen = 0;
+}
+
+/* Copy the 4 byte value from v into the memory location pointed to by *cp,
+   If your architecture allows unaligned access this is equivalent to
+   * (uint32_t *) cp = v  */
+static void
+set_uint32 (char *cp, uint32_t v)
+{
+  memcpy (cp, &v, sizeof v);

 }
 
 }
 

-/* Put result from CTX in first 16 bytes following RESBUF.  The result must
-   be in little endian byte order.  */
+/* Put result from CTX in first 16 bytes following RESBUF.  The result
+   must be in little endian byte order.  */

 void *
 void *

-md5_read_ctx (ctx, resbuf)
-     const struct md5_ctx *ctx;
-     void *resbuf;
+md5_read_ctx (const struct md5_ctx *ctx, void *resbuf)

 {
 {

-  ((md5_uint32 *) resbuf)[0] = SWAP (ctx->A);
-  ((md5_uint32 *) resbuf)[1] = SWAP (ctx->B);
-  ((md5_uint32 *) resbuf)[2] = SWAP (ctx->C);
-  ((md5_uint32 *) resbuf)[3] = SWAP (ctx->D);
+  char *r = resbuf;
+  set_uint32 (r + 0 * sizeof ctx->A, SWAP (ctx->A));
+  set_uint32 (r + 1 * sizeof ctx->B, SWAP (ctx->B));
+  set_uint32 (r + 2 * sizeof ctx->C, SWAP (ctx->C));
+  set_uint32 (r + 3 * sizeof ctx->D, SWAP (ctx->D));

 
   return resbuf;
 }
 
 
   return resbuf;
 }
 

+/* Process the remaining bytes in the internal buffer and the usual
+   prolog according to the standard and write the result to RESBUF.  */
+void *
+md5_finish_ctx (struct md5_ctx *ctx, void *resbuf)
+{
+  /* Take yet unprocessed bytes into account.  */
+  uint32_t bytes = ctx->buflen;
+  size_t size = (bytes < 56) ? 64 / 4 : 64 * 2 / 4;
+
+  /* Now count remaining bytes.  */
+  ctx->total[0] += bytes;
+  if (ctx->total[0] < bytes)
+    ++ctx->total[1];
+
+  /* Put the 64-bit file length in *bits* at the end of the buffer.  */
+  ctx->buffer[size - 2] = SWAP (ctx->total[0] << 3);
+  ctx->buffer[size - 1] = SWAP ((ctx->total[1] << 3) | (ctx->total[0] >> 29));
+
+  memcpy (&((char *) ctx->buffer)[bytes], fillbuf, (size - 2) * 4 - bytes);
+
+  /* Process last bytes.  */
+  md5_process_block (ctx->buffer, size * 4, ctx);
+
+  return md5_read_ctx (ctx, 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
 /* 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 (stream, resblock)
-     FILE *stream;
-     void *resblock;
+md5_stream (FILE *stream, void *resblock)

 {
 {

-  /* Important: BLOCKSIZE must be a multiple of 64.  */
-#define BLOCKSIZE 4096

   struct md5_ctx ctx;
   struct md5_ctx ctx;

-  md5_uint32 len[2];
-  char buffer[BLOCKSIZE + 72];
-  size_t pad, sum;
+  size_t sum;
+
+  char *buffer = malloc (BLOCKSIZE + 72);
+  if (!buffer)
+    return 1;

 
   /* Initialize the computation context.  */
   md5_init_ctx (&ctx);
 
 
   /* Initialize the computation context.  */
   md5_init_ctx (&ctx);
 

-  len[0] = 0;
-  len[1] = 0;
-

   /* Iterate over full file contents.  */
   while (1)
     {
       /* We read the file in blocks of BLOCKSIZE bytes.  One call of the
   /* Iterate over full file contents.  */
   while (1)
     {
       /* We read the file in blocks of BLOCKSIZE bytes.  One call of the

-        computation function processes the whole buffer so that with the
-        next round of the loop another block can be read.  */
+         computation function processes the whole buffer so that with the
+         next round of the loop another block can be read.  */

       size_t n;
       sum = 0;
 
       /* Read block.  Take care for partial reads.  */
       size_t n;
       sum = 0;
 
       /* Read block.  Take care for partial reads.  */

-      do
-       {
-         n = fread (buffer, 1, BLOCKSIZE - sum, stream);
-
-         sum += n;
-       }
-      while (sum < BLOCKSIZE && n != 0);
-      if (n == 0 && ferror (stream))
-        return 1;
-
-      /* RFC 1321 specifies the possible length of the file up to 2^64 bits.
-        Here we only compute the number of bytes.  Do a double word
-         increment.  */
-      len[0] += sum;
-      if (len[0] < sum)
-       ++len[1];
-
-      /* If end of file is reached, end the loop.  */
-      if (n == 0)
-       break;
+      while (1)
+        {
+          n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
+
+          sum += n;
+
+          if (sum == BLOCKSIZE)
+            break;
+
+          if (n == 0)
+            {
+              /* Check for the error flag IFF N == 0, so that we don't
+                 exit the loop after a partial read due to e.g., EAGAIN
+                 or EWOULDBLOCK.  */
+              if (ferror (stream))
+                {
+                  free (buffer);
+                  return 1;
+                }
+              goto process_partial_block;
+            }
+
+          /* We've read at least one byte, so ignore errors.  But always
+             check for EOF, since feof may be true even though N > 0.
+             Otherwise, we could end up calling fread after EOF.  */
+          if (feof (stream))
+            goto process_partial_block;
+        }

 
       /* Process buffer with BLOCKSIZE bytes.  Note that
 
       /* Process buffer with BLOCKSIZE bytes.  Note that

-                       BLOCKSIZE % 64 == 0
+         BLOCKSIZE % 64 == 0

        */
       md5_process_block (buffer, BLOCKSIZE, &ctx);
     }
 
        */
       md5_process_block (buffer, BLOCKSIZE, &ctx);
     }
 

-  /* We can copy 64 byte because the buffer is always big enough.  FILLBUF
-     contains the needed bits.  */
-  memcpy (&buffer[sum], fillbuf, 64);
-
-  /* Compute amount of padding bytes needed.  Alignment is done to
-               (N + PAD) % 64 == 56
-     There is always at least one byte padded.  I.e. even the alignment
-     is correctly aligned 64 padding bytes are added.  */
-  pad = sum & 63;
-  pad = pad >= 56 ? 64 + 56 - pad : 56 - pad;
-
-  /* Put the 64-bit file length in *bits* at the end of the buffer.  */
-  *(md5_uint32 *) &buffer[sum + pad] = SWAP (len[0] << 3);
-  *(md5_uint32 *) &buffer[sum + pad + 4] = SWAP ((len[1] << 3)
-                                                | (len[0] >> 29));
+process_partial_block:

 
 

-  /* Process last bytes.  */
-  md5_process_block (buffer, sum + pad + 8, &ctx);
+  /* Process any remaining bytes.  */
+  if (sum > 0)
+    md5_process_bytes (buffer, sum, &ctx);

 
   /* Construct result in desired memory.  */
 
   /* Construct result in desired memory.  */

-  md5_read_ctx (&ctx, resblock);
+  md5_finish_ctx (&ctx, resblock);
+  free (buffer);

   return 0;
 }
 
   return 0;
 }
 


@@ -162,43 +207,85 @@ md5_stream (stream, resblock)
    output yields to the wanted ASCII representation of the message
    digest.  */
 void *
    output yields to the wanted ASCII representation of the message
    digest.  */
 void *

-md5_buffer (buffer, len, resblock)
-     const char *buffer;
-     size_t len;
-     void *resblock;
+md5_buffer (const char *buffer, size_t len, void *resblock)

 {
   struct md5_ctx ctx;
 {
   struct md5_ctx ctx;

-  char restbuf[64 + 72];
-  size_t blocks = len & ~63;
-  size_t pad, rest;

 
   /* Initialize the computation context.  */
   md5_init_ctx (&ctx);
 
   /* Process whole buffer but last len % 64 bytes.  */
 
   /* Initialize the computation context.  */
   md5_init_ctx (&ctx);
 
   /* Process whole buffer but last len % 64 bytes.  */

-  md5_process_block (buffer, blocks, &ctx);
+  md5_process_bytes (buffer, len, &ctx);

 
 

-  /* REST bytes are not processed yet.  */
-  rest = len - blocks;
-  /* Copy to own buffer.  */
-  memcpy (restbuf, &buffer[blocks], rest);
-  /* Append needed fill bytes at end of buffer.  We can copy 64 byte
-     because the buffer is always big enough.  */
-  memcpy (&restbuf[rest], fillbuf, 64);
+  /* Put result in desired memory area.  */
+  return md5_finish_ctx (&ctx, resblock);
+}

 
 

-  /* PAD bytes are used for padding to correct alignment.  Note that
-     always at least one byte is padded.  */
-  pad = rest >= 56 ? 64 + 56 - rest : 56 - rest;

 
 

-  /* Put length of buffer in *bits* in last eight bytes.  */
-  *(md5_uint32 *) &restbuf[rest + pad] = (md5_uint32) SWAP (len << 3);
-  *(md5_uint32 *) &restbuf[rest + pad + 4] = (md5_uint32) SWAP (len >> 29);
+void
+md5_process_bytes (const void *buffer, size_t len, struct md5_ctx *ctx)
+{
+  /* When we already have some bits in our internal buffer concatenate
+     both inputs first.  */
+  if (ctx->buflen != 0)
+    {
+      size_t left_over = ctx->buflen;
+      size_t add = 128 - left_over > len ? len : 128 - left_over;

 
 

-  /* Process last bytes.  */
-  md5_process_block (restbuf, rest + pad + 8, &ctx);
+      memcpy (&((char *) ctx->buffer)[left_over], buffer, add);
+      ctx->buflen += add;

 
 

-  /* Put result in desired memory area.  */
-  return md5_read_ctx (&ctx, resblock);
+      if (ctx->buflen > 64)
+        {
+          md5_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
+
+          ctx->buflen &= 63;
+          /* The regions in the following copy operation cannot overlap.  */
+          memcpy (ctx->buffer,
+                  &((char *) ctx->buffer)[(left_over + add) & ~63],
+                  ctx->buflen);
+        }
+
+      buffer = (const char *) buffer + add;
+      len -= add;
+    }
+
+  /* Process available complete blocks.  */
+  if (len >= 64)
+    {
+#if !_STRING_ARCH_unaligned
+# define UNALIGNED_P(p) ((uintptr_t) (p) % alignof (uint32_t) != 0)
+      if (UNALIGNED_P (buffer))
+        while (len > 64)
+          {
+            md5_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
+            buffer = (const char *) buffer + 64;
+            len -= 64;
+          }
+      else
+#endif
+        {
+          md5_process_block (buffer, len & ~63, ctx);
+          buffer = (const char *) buffer + (len & ~63);
+          len &= 63;
+        }
+    }
+
+  /* Move remaining bytes in internal buffer.  */
+  if (len > 0)
+    {
+      size_t left_over = ctx->buflen;
+
+      memcpy (&((char *) ctx->buffer)[left_over], buffer, len);
+      left_over += len;
+      if (left_over >= 64)
+        {
+          md5_process_block (ctx->buffer, 64, ctx);
+          left_over -= 64;
+          memcpy (ctx->buffer, &ctx->buffer[16], left_over);
+        }
+      ctx->buflen = left_over;
+    }

 }
 
 
 }
 
 


@@ -215,141 +302,149 @@ md5_buffer (buffer, len, resblock)
    It is assumed that LEN % 64 == 0.  */
 
 void
    It is assumed that LEN % 64 == 0.  */
 
 void

-md5_process_block (buffer, len, ctx)
-     const void *buffer;
-     size_t len;
-     struct md5_ctx *ctx;
+md5_process_block (const void *buffer, size_t len, struct md5_ctx *ctx)

 {
 {

-  md5_uint32 correct_words[16];
-  const md5_uint32 *words = buffer;
-  size_t nwords = len / sizeof (md5_uint32);
-  const md5_uint32 *endp = words + nwords;
-  md5_uint32 A = ctx->A;
-  md5_uint32 B = ctx->B;
-  md5_uint32 C = ctx->C;
-  md5_uint32 D = ctx->D;
+  uint32_t correct_words[16];
+  const uint32_t *words = buffer;
+  size_t nwords = len / sizeof (uint32_t);
+  const uint32_t *endp = words + nwords;
+  uint32_t A = ctx->A;
+  uint32_t B = ctx->B;
+  uint32_t C = ctx->C;
+  uint32_t D = ctx->D;
+  uint32_t lolen = len;
+
+  /* First increment the byte count.  RFC 1321 specifies the possible
+     length of the file up to 2^64 bits.  Here we only compute the
+     number of bytes.  Do a double word increment.  */
+  ctx->total[0] += lolen;
+  ctx->total[1] += (len >> 31 >> 1) + (ctx->total[0] < lolen);

 
   /* Process all bytes in the buffer with 64 bytes in each round of
      the loop.  */
   while (words < endp)
     {
 
   /* Process all bytes in the buffer with 64 bytes in each round of
      the loop.  */
   while (words < endp)
     {

-      md5_uint32 *cwp = correct_words;
-      md5_uint32 A_save = A;
-      md5_uint32 B_save = B;
-      md5_uint32 C_save = C;
-      md5_uint32 D_save = D;
+      uint32_t *cwp = correct_words;
+      uint32_t A_save = A;
+      uint32_t B_save = B;
+      uint32_t C_save = C;
+      uint32_t D_save = D;

 
       /* First round: using the given function, the context and a constant
 
       /* First round: using the given function, the context and a constant

-        the next context is computed.  Because the algorithms processing
-        unit is a 32-bit word and it is determined to work on words in
-        little endian byte order we perhaps have to change the byte order
-        before the computation.  To reduce the work for the next steps
-        we store the swapped words in the array CORRECT_WORDS.  */
-
-#define OP(a, b, c, d, s, T)                                           \
-      do                                                               \
-        {                                                              \
-         a += FF (b, c, d) + (*cwp++ = SWAP (*words)) + T;             \
-         ++words;                                                      \
-         CYCLIC (a, s);                                                \
-         a += b;                                                       \
-        }                                                              \
+         the next context is computed.  Because the algorithms processing
+         unit is a 32-bit word and it is determined to work on words in
+         little endian byte order we perhaps have to change the byte order
+         before the computation.  To reduce the work for the next steps
+         we store the swapped words in the array CORRECT_WORDS.  */
+
+#define OP(a, b, c, d, s, T)                                            \
+      do                                                                \
+        {                                                               \
+          a += FF (b, c, d) + (*cwp++ = SWAP (*words)) + T;             \
+          ++words;                                                      \
+          CYCLIC (a, s);                                                \
+          a += b;                                                       \
+        }                                                               \

       while (0)
 
       /* It is unfortunate that C does not provide an operator for
       while (0)
 
       /* It is unfortunate that C does not provide an operator for

-        cyclic rotation.  Hope the C compiler is smart enough.  */
+         cyclic rotation.  Hope the C compiler is smart enough.  */

 #define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s)))
 
       /* Before we start, one word to the strange constants.
 #define CYCLIC(w, s) (w = (w << s) | (w >> (32 - s)))
 
       /* Before we start, one word to the strange constants.

-        They are defined in RFC 1321 as
+         They are defined in RFC 1321 as
+
+         T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
+
+         Here is an equivalent invocation using Perl:

 
 

-        T[i] = (int) (4294967296.0 * fabs (sin (i))), i=1..64
+         perl -e 'foreach(1..64){printf "0x%08x\n", int (4294967296 * abs (sin $_))}'

        */
 
       /* Round 1.  */
        */
 
       /* Round 1.  */

-      OP (A, B, C, D,  7, 0xd76aa478);
+      OP (A, B, C, D, 7, 0xd76aa478);

       OP (D, A, B, C, 12, 0xe8c7b756);
       OP (C, D, A, B, 17, 0x242070db);
       OP (B, C, D, A, 22, 0xc1bdceee);
       OP (D, A, B, C, 12, 0xe8c7b756);
       OP (C, D, A, B, 17, 0x242070db);
       OP (B, C, D, A, 22, 0xc1bdceee);

-      OP (A, B, C, D,  7, 0xf57c0faf);
+      OP (A, B, C, D, 7, 0xf57c0faf);

       OP (D, A, B, C, 12, 0x4787c62a);
       OP (C, D, A, B, 17, 0xa8304613);
       OP (B, C, D, A, 22, 0xfd469501);
       OP (D, A, B, C, 12, 0x4787c62a);
       OP (C, D, A, B, 17, 0xa8304613);
       OP (B, C, D, A, 22, 0xfd469501);

-      OP (A, B, C, D,  7, 0x698098d8);
+      OP (A, B, C, D, 7, 0x698098d8);

       OP (D, A, B, C, 12, 0x8b44f7af);
       OP (C, D, A, B, 17, 0xffff5bb1);
       OP (B, C, D, A, 22, 0x895cd7be);
       OP (D, A, B, C, 12, 0x8b44f7af);
       OP (C, D, A, B, 17, 0xffff5bb1);
       OP (B, C, D, A, 22, 0x895cd7be);

-      OP (A, B, C, D,  7, 0x6b901122);
+      OP (A, B, C, D, 7, 0x6b901122);

       OP (D, A, B, C, 12, 0xfd987193);
       OP (C, D, A, B, 17, 0xa679438e);
       OP (B, C, D, A, 22, 0x49b40821);
 
       /* For the second to fourth round we have the possibly swapped words
       OP (D, A, B, C, 12, 0xfd987193);
       OP (C, D, A, B, 17, 0xa679438e);
       OP (B, C, D, A, 22, 0x49b40821);
 
       /* For the second to fourth round we have the possibly swapped words

-        in CORRECT_WORDS.  Redefine the macro to take an additional first
-        argument specifying the function to use.  */
+         in CORRECT_WORDS.  Redefine the macro to take an additional first
+         argument specifying the function to use.  */

 #undef OP
 #undef OP

-#define OP(f, a, b, c, d, k, s, T)                                     \
-      do                                                               \
-       {                                                               \
-         a += f (b, c, d) + correct_words[k] + T;                      \
-         CYCLIC (a, s);                                                \
-         a += b;                                                       \
-       }                                                               \
+#define OP(f, a, b, c, d, k, s, T)                                      \
+      do                                                                \
+        {                                                               \
+          a += f (b, c, d) + correct_words[k] + T;                      \
+          CYCLIC (a, s);                                                \
+          a += b;                                                       \
+        }                                                               \

       while (0)
 
       /* Round 2.  */
       while (0)
 
       /* Round 2.  */

-      OP (FG, A, B, C, D,  1,  5, 0xf61e2562);
-      OP (FG, D, A, B, C,  6,  9, 0xc040b340);
+      OP (FG, A, B, C, D, 1, 5, 0xf61e2562);
+      OP (FG, D, A, B, C, 6, 9, 0xc040b340);

       OP (FG, C, D, A, B, 11, 14, 0x265e5a51);
       OP (FG, C, D, A, B, 11, 14, 0x265e5a51);

-      OP (FG, B, C, D, A,  0, 20, 0xe9b6c7aa);
-      OP (FG, A, B, C, D,  5,  5, 0xd62f105d);
-      OP (FG, D, A, B, C, 10,  9, 0x02441453);
+      OP (FG, B, C, D, A, 0, 20, 0xe9b6c7aa);
+      OP (FG, A, B, C, D, 5, 5, 0xd62f105d);
+      OP (FG, D, A, B, C, 10, 9, 0x02441453);

       OP (FG, C, D, A, B, 15, 14, 0xd8a1e681);
       OP (FG, C, D, A, B, 15, 14, 0xd8a1e681);

-      OP (FG, B, C, D, A,  4, 20, 0xe7d3fbc8);
-      OP (FG, A, B, C, D,  9,  5, 0x21e1cde6);
-      OP (FG, D, A, B, C, 14,  9, 0xc33707d6);
-      OP (FG, C, D, A, B,  3, 14, 0xf4d50d87);
-      OP (FG, B, C, D, A,  8, 20, 0x455a14ed);
-      OP (FG, A, B, C, D, 13,  5, 0xa9e3e905);
-      OP (FG, D, A, B, C,  2,  9, 0xfcefa3f8);
-      OP (FG, C, D, A, B,  7, 14, 0x676f02d9);
+      OP (FG, B, C, D, A, 4, 20, 0xe7d3fbc8);
+      OP (FG, A, B, C, D, 9, 5, 0x21e1cde6);
+      OP (FG, D, A, B, C, 14, 9, 0xc33707d6);
+      OP (FG, C, D, A, B, 3, 14, 0xf4d50d87);
+      OP (FG, B, C, D, A, 8, 20, 0x455a14ed);
+      OP (FG, A, B, C, D, 13, 5, 0xa9e3e905);
+      OP (FG, D, A, B, C, 2, 9, 0xfcefa3f8);
+      OP (FG, C, D, A, B, 7, 14, 0x676f02d9);

       OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
 
       /* Round 3.  */
       OP (FG, B, C, D, A, 12, 20, 0x8d2a4c8a);
 
       /* Round 3.  */

-      OP (FH, A, B, C, D,  5,  4, 0xfffa3942);
-      OP (FH, D, A, B, C,  8, 11, 0x8771f681);
+      OP (FH, A, B, C, D, 5, 4, 0xfffa3942);
+      OP (FH, D, A, B, C, 8, 11, 0x8771f681);

       OP (FH, C, D, A, B, 11, 16, 0x6d9d6122);
       OP (FH, B, C, D, A, 14, 23, 0xfde5380c);
       OP (FH, C, D, A, B, 11, 16, 0x6d9d6122);
       OP (FH, B, C, D, A, 14, 23, 0xfde5380c);

-      OP (FH, A, B, C, D,  1,  4, 0xa4beea44);
-      OP (FH, D, A, B, C,  4, 11, 0x4bdecfa9);
-      OP (FH, C, D, A, B,  7, 16, 0xf6bb4b60);
+      OP (FH, A, B, C, D, 1, 4, 0xa4beea44);
+      OP (FH, D, A, B, C, 4, 11, 0x4bdecfa9);
+      OP (FH, C, D, A, B, 7, 16, 0xf6bb4b60);

       OP (FH, B, C, D, A, 10, 23, 0xbebfbc70);
       OP (FH, B, C, D, A, 10, 23, 0xbebfbc70);

-      OP (FH, A, B, C, D, 13,  4, 0x289b7ec6);
-      OP (FH, D, A, B, C,  0, 11, 0xeaa127fa);
-      OP (FH, C, D, A, B,  3, 16, 0xd4ef3085);
-      OP (FH, B, C, D, A,  6, 23, 0x04881d05);
-      OP (FH, A, B, C, D,  9,  4, 0xd9d4d039);
+      OP (FH, A, B, C, D, 13, 4, 0x289b7ec6);
+      OP (FH, D, A, B, C, 0, 11, 0xeaa127fa);
+      OP (FH, C, D, A, B, 3, 16, 0xd4ef3085);
+      OP (FH, B, C, D, A, 6, 23, 0x04881d05);
+      OP (FH, A, B, C, D, 9, 4, 0xd9d4d039);

       OP (FH, D, A, B, C, 12, 11, 0xe6db99e5);
       OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8);
       OP (FH, D, A, B, C, 12, 11, 0xe6db99e5);
       OP (FH, C, D, A, B, 15, 16, 0x1fa27cf8);

-      OP (FH, B, C, D, A,  2, 23, 0xc4ac5665);
+      OP (FH, B, C, D, A, 2, 23, 0xc4ac5665);

 
       /* Round 4.  */
 
       /* Round 4.  */

-      OP (FI, A, B, C, D,  0,  6, 0xf4292244);
-      OP (FI, D, A, B, C,  7, 10, 0x432aff97);
+      OP (FI, A, B, C, D, 0, 6, 0xf4292244);
+      OP (FI, D, A, B, C, 7, 10, 0x432aff97);

       OP (FI, C, D, A, B, 14, 15, 0xab9423a7);
       OP (FI, C, D, A, B, 14, 15, 0xab9423a7);

-      OP (FI, B, C, D, A,  5, 21, 0xfc93a039);
-      OP (FI, A, B, C, D, 12,  6, 0x655b59c3);
-      OP (FI, D, A, B, C,  3, 10, 0x8f0ccc92);
+      OP (FI, B, C, D, A, 5, 21, 0xfc93a039);
+      OP (FI, A, B, C, D, 12, 6, 0x655b59c3);
+      OP (FI, D, A, B, C, 3, 10, 0x8f0ccc92);

       OP (FI, C, D, A, B, 10, 15, 0xffeff47d);
       OP (FI, C, D, A, B, 10, 15, 0xffeff47d);

-      OP (FI, B, C, D, A,  1, 21, 0x85845dd1);
-      OP (FI, A, B, C, D,  8,  6, 0x6fa87e4f);
+      OP (FI, B, C, D, A, 1, 21, 0x85845dd1);
+      OP (FI, A, B, C, D, 8, 6, 0x6fa87e4f);

       OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0);
       OP (FI, D, A, B, C, 15, 10, 0xfe2ce6e0);

-      OP (FI, C, D, A, B,  6, 15, 0xa3014314);
+      OP (FI, C, D, A, B, 6, 15, 0xa3014314);

       OP (FI, B, C, D, A, 13, 21, 0x4e0811a1);
       OP (FI, B, C, D, A, 13, 21, 0x4e0811a1);

-      OP (FI, A, B, C, D,  4,  6, 0xf7537e82);
+      OP (FI, A, B, C, D, 4, 6, 0xf7537e82);

       OP (FI, D, A, B, C, 11, 10, 0xbd3af235);
       OP (FI, D, A, B, C, 11, 10, 0xbd3af235);

-      OP (FI, C, D, A, B,  2, 15, 0x2ad7d2bb);
-      OP (FI, B, C, D, A,  9, 21, 0xeb86d391);
+      OP (FI, C, D, A, B, 2, 15, 0x2ad7d2bb);
+      OP (FI, B, C, D, A, 9, 21, 0xeb86d391);

 
       /* Add the starting values of the context.  */
       A += A_save;
 
       /* Add the starting values of the context.  */
       A += A_save;