crypto: fix bug in large buffer handling

[gnulib.git] / lib / md5.c

diff --git a/lib/md5.c b/lib/md5.c
index 498ac98..66ede23 100644 (file)
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -312,13 +312,13 @@ md5_process_block (const void *buffer, size_t len, struct md5_ctx *ctx)
   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] += len;
-  if (ctx->total[0] < len)
-    ++ctx->total[1];
+  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.  */