--- orig/libgcrypt-1.4.3/cipher/md.c    2008-09-12 15:43:52.000000000 +0200
+++ libgcrypt-1.4.3/cipher/md.c 2008-11-05 19:52:32.000000000 +0100
@@ -834,7 +834,7 @@ prepare_macpads( gcry_md_hd_t hd, const 
   if ( !algo )
     return GPG_ERR_DIGEST_ALGO; /* i.e. no algo enabled */
 
-  if ( keylen > 64 ) 
+  if ( keylen > hd->ctx->macpads_Bsize ) 
     {
       helpkey = gcry_malloc_secure ( md_digest_length( algo ) );
       if ( !helpkey )
@@ -842,7 +842,7 @@ prepare_macpads( gcry_md_hd_t hd, const 
       gcry_md_hash_buffer ( algo, helpkey, key, keylen );
       key = helpkey;
       keylen = md_digest_length( algo );
-      gcry_assert ( keylen <= 64 );
+      gcry_assert ( keylen <= hd->ctx->macpads_Bsize );
     }
 
   memset ( hd->ctx->macpads, 0, 2*(hd->ctx->macpads_Bsize) );