First version of new authentification procedure: now authentification is one-stage (instead of two-stage in 4.1)

For now following tasks have been done:
- PASSWORD() function was rewritten. PASSWORD() now returns SHA1
  hash_stage2; for new passwords user.password contains '*'hash_stage2; sql_yacc.yy also fixed; 

- password.c: new functions were implemented, old rolled back to 4.0 state

- server code was rewritten to use new authorization algorithm (check_user(), change
  user, and other stuff in sql/sql_parse.cc)

- client code was rewritten to use new authorization algorithm
  (mysql_real_connect, myslq_authenticate in sql-common/client.c)

- now server barks on 45-byte-length 4.1.0 passwords and refuses 4.1.0-style
  authentification. Users with 4.1.0 passwords are blocked (sql/sql_acl.cc)

- mysqladmin.c was fixed to work correctly with new passwords

Tests for 4.0-4.1.1, 4.1.1-4.1.1 (with or without db/password) logons was performed;
mysqladmin also was tested. Additional check are nevertheless necessary.


BitKeeper/etc/ignore:
  Added start_mysqld.sh mysys/main.cc to the ignore list
client/mysqladmin.c:
  fixed with new password api
include/mysql.h:
  So as scramble_323 accepts only null-terminated message, two scramble buffs are necessary.
  gotta be fixed
include/mysql_com.h:
  new constants and password.c api changes
libmysql/libmysql.c:
  mysql_change_user rewritten to work with new password api
scripts/mysql_create_system_tables.sh:
  fixed 'Password' column length to 41
scripts/mysql_fix_privilege_tables.sql:
  fixed 'Password' column length to 41
sql-common/client.c:
  mysql_real_connect rewritten to support new handshake procedure
sql/item_strfunc.cc:
  Item_func_password and Item_func_old_password rewritten with new password api
sql/item_strfunc.h:
  bit commented, numbers replaced with #defined constants
sql/mysql_priv.h:
  removed unnecessary declaration as now all constants defined is in mysql_com.h
sql/mysqld.cc:
  scramble initialization moved to sql_parce.cc:check_connection
sql/password.c:
  All 4.1 functions were rolled back to 4.0 with attempt to save all possible 4.0-4.1 changes.
  Names for 4.0 functions were suffixed with '_323'
  Functions for new handshake were added.
sql/slave.cc:
  Fixed to new constant; Bug #766 remains to be fixed
sql/slave.h:
  fixed to new constant; Buf #766 remains to be fixed
sql/sql_acl.cc:
  rewritten to support new passwords (41 byte-long) and password api
sql/sql_acl.h:
  ditto
sql/sql_class.cc:
  initialization for new members added
sql/sql_class.h:
  same thing as in struct mysql - scramble is used for new family of functions, scramble_323 - for old
sql/sql_parse.cc:
  check_connections was renamed to check_connection as this name reflects better what this function does
  authorization part of check_connection was rewritten
  check_user was rewritten with new password and acl api
  new function 'authenticate', which optionally re-request scramble from client was added
  fixed some typos
  COM_CHANGE_USER piece of dipsatch_command() was rewritten
sql/sql_repl.h:
  HASH_PASSWORD_LENGTH replaced with SCRAMBLED_PASSWORD_CHAR_LENGTH
  bug #766 remains
sql/sql_yacc.yy:
  Two-argument form of PASSWORD() was removed
  PASSWORD() function was fixed with new password api.
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

1 files changed, 10 insertions, 4 deletions

diff --git a/sql/sql_class.h b/sql/sql_class.h
index ccfe2555518..d962cc8086e 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -529,10 +529,16 @@ public:
   enum_tx_isolation session_tx_isolation;
   /* for user variables replication*/
   DYNAMIC_ARRAY user_var_events;
-             // extend scramble to handle new auth
-  char	     scramble[SCRAMBLE41_LENGTH+1];
-             // old scramble is needed to handle old clients
-  char       old_scramble[SCRAMBLE_LENGTH+1];
+
+  /* scramble - random string sent to client on handshake */
+  char	     scramble[SCRAMBLE_LENGTH+1];
+  /*
+    The same as scramble but for old password checking routines. It always
+    contains first N bytes of scramble.
+    See check_connection() at sql_parse.cc for authentification details.
+  */
+  char       scramble_323[SCRAMBLE_LENGTH_323+1];
+
   uint8	     query_cache_type;		// type of query cache processing
   bool       slave_thread;
   bool	     set_query_id,locked,count_cuted_fields,some_tables_deleted;