bzr push into mysql-trunk branch (kristofer.pettersson:4701 to 4702)

[Kristofer Pettersson]

 4702 Kristofer Pettersson	2012-10-10 [merge]
      auto merge 5.6->trunk

    modified:
      sql/password.c
 4701 Bjorn Munch	2012-10-10 [merge]
      Upmerge WL 6055 followup 5.6 -> trunk

    removed:
      support-files/my-huge.cnf.sh
      support-files/my-innodb-heavy-4G.cnf.sh
      support-files/my-large.cnf.sh
      support-files/my-medium.cnf.sh
      support-files/my-small.cnf.sh
    added:
      support-files/my-default.cnf.sh
=== modified file 'sql/password.c'
--- a/sql/password.c	2012-06-28 13:48:07 +0000
+++ b/sql/password.c	2012-10-10 10:12:58 +0000
@@ -291,20 +291,29 @@ void make_password_from_salt_323(char *t
 */
 
 /**
-    Generate string of printable random characters of requested length.
+  Generate string of printable pseudo random characters of requested length.
   
-    @param to[out]  Buffer for generation; must be at least length+1 bytes
+  @param to[out]    Buffer for generation; must be at least length+1 bytes
                     long; result string is always null-terminated
-    length[in]      How many random characters to put in buffer
-    rand_st         Structure used for number generation
+  @param length[in] How many random characters to put in buffer
+  @param rand_st    Structure used for number generation
+    
+  @note This function is restricted for use with
+    native_password_authenticate() because of security reasons.
+      
+  DON'T RELY ON THIS FUNCTION FOR A UNIFORMLY DISTRIBUTION OF BITS!
+  
 */
 
 void create_random_string(char *to, uint length, struct rand_struct *rand_st)
 {
   char *end= to + length;
-  /* Use pointer arithmetics as it is faster way to do so. */
+  /*
+    Warning: my_rnd() is a fast prng, but it doesn't necessarily have a uniform
+    distribution.
+  */
   for (; to < end; to++)
-    *to= (char) (my_rnd_ssl(rand_st) * 94 + 33);
+    *to= (char) (my_rnd(rand_st) * 94 + 33);
   *to= '\0';
 }
 

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