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[pf3gnuchains/pf3gnuchains4x.git] / libiberty / md5.c

diff --git a/libiberty/md5.c b/libiberty/md5.c
index e458f2a..0db8fc8 100644 (file)
--- a/libiberty/md5.c
+++ b/libiberty/md5.c
@@ -1,6 +1,6 @@
 /* md5.c - Functions to compute MD5 message digest of files or memory blocks
    according to the definition of MD5 in RFC 1321 from April 1992.
-   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+   Copyright (C) 1995, 1996, 2011 Free Software Foundation, Inc.
 
    NOTE: This source is derived from an old version taken from the GNU C
    Library (glibc).
@@ -17,7 +17,7 @@
 
    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.  */
+   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
 
 /* Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.  */
 
@@ -62,8 +62,7 @@ static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ...  */ };
 /* 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 = (md5_uint32) 0x67452301;
   ctx->B = (md5_uint32) 0xefcdab89;
@@ -77,17 +76,19 @@ md5_init_ctx (ctx)
 /* Put result from CTX in first 16 bytes following RESBUF.  The result
    must be in little endian byte order.
 
-   IMPORTANT: On some systems it is required that RESBUF is correctly
-   aligned for a 32 bits value.  */
+   IMPORTANT: RESBUF may not be aligned as strongly as MD5_UNIT32 so we
+   put things in a local (aligned) buffer first, then memcpy into RESBUF.  */
 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);
+  md5_uint32 buffer[4];
+
+  buffer[0] = SWAP (ctx->A);
+  buffer[1] = SWAP (ctx->B);
+  buffer[2] = SWAP (ctx->C);
+  buffer[3] = SWAP (ctx->D);
+
+  memcpy (resbuf, buffer, 16);
 
   return resbuf;
 }
@@ -98,9 +99,7 @@ md5_read_ctx (ctx, resbuf)
    IMPORTANT: On some systems it is required that RESBUF is correctly
    aligned for a 32 bits value.  */
 void *
-md5_finish_ctx (ctx, resbuf)
-     struct md5_ctx *ctx;
-     void *resbuf;
+md5_finish_ctx (struct md5_ctx *ctx, void *resbuf)
 {
   /* Take yet unprocessed bytes into account.  */
   md5_uint32 bytes = ctx->buflen;
@@ -129,9 +128,7 @@ md5_finish_ctx (ctx, resbuf)
    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
@@ -186,10 +183,7 @@ md5_stream (stream, resblock)
    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;
 
@@ -205,10 +199,7 @@ md5_buffer (buffer, len, resblock)
 
 
 void
-md5_process_bytes (buffer, len, ctx)
-     const void *buffer;
-     size_t len;
-     struct md5_ctx *ctx;
+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.  */
@@ -236,9 +227,29 @@ md5_process_bytes (buffer, len, ctx)
   /* Process available complete blocks.  */
   if (len > 64)
     {
-      md5_process_block (buffer, len & ~63, ctx);
-      buffer = (const void *) ((const char *) buffer + (len & ~63));
-      len &= 63;
+#if !_STRING_ARCH_unaligned
+/* To check alignment gcc has an appropriate operator.  Other
+   compilers don't.  */
+# if __GNUC__ >= 2
+#  define UNALIGNED_P(p) (((md5_uintptr) p) % __alignof__ (md5_uint32) != 0)
+# else
+#  define UNALIGNED_P(p) (((md5_uintptr) p) % sizeof (md5_uint32) != 0)
+# endif
+      if (UNALIGNED_P (buffer))
+        while (len > 64)
+          {
+           memcpy (ctx->buffer, buffer, 64);
+            md5_process_block (ctx->buffer, 64, ctx);
+            buffer = (const char *) buffer + 64;
+            len -= 64;
+          }
+      else
+#endif
+       {
+         md5_process_block (buffer, len & ~63, ctx);
+         buffer = (const void *) ((const char *) buffer + (len & ~63));
+         len &= 63;
+       }
     }
 
   /* Move remaining bytes in internal buffer.  */
@@ -263,10 +274,7 @@ md5_process_bytes (buffer, len, ctx)
    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 = (const md5_uint32 *) buffer;