今天需要在測試環境中做一些效能測試，為了不影響原有的資料，準備建立一個臨時的schema。但是建立的時候報瞭如下的錯誤。
SQL> create user mig_perf identified by mig_perf;
create user mig_perf identified by mig_perf
*
ERROR at line 1:
ORA-28003: password verification for the specified password failed
ORA-20002: Password same as or similar to user

第一感覺就是開啟了密碼的校驗，11g裡面有一個新特性的關於密碼的大小寫敏感的，會不會有關聯呢。似乎有些牽強，但是目前是false選項，表示不對大小寫敏感。

SQL> show parameter sen
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
sec_case_sensitive_logon boolean FALSE

如果還有問題，就需要從profie的角度入手了，比如登入密碼超過10次，賬戶就會鎖定，這些都是在profile裡面配置的。
來看看能得到什麼資訊。

select *from dba_profiles order by profile;
SQL> /

PROFILE RESOURCE_NAME RESOURCE LIMIT
------------------------------ -------------------------------- -------- ----------------------------------------
DBAMON_PF1 COMPOSITE_LIMIT KERNEL UNLIMITED
DBAMON_PF1 SESSIONS_PER_USER KERNEL 10
DBAMON_PF1 CPU_PER_SESSION KERNEL UNLIMITED
DBAMON_PF1 CPU_PER_CALL KERNEL UNLIMITED
DBAMON_PF1 LOGICAL_READS_PER_SESSION KERNEL UNLIMITED
DBAMON_PF1 LOGICAL_READS_PER_CALL KERNEL UNLIMITED
DBAMON_PF1 IDLE_TIME KERNEL UNLIMITED
DBAMON_PF1 CONNECT_TIME KERNEL UNLIMITED
DBAMON_PF1 PRIVATE_SGA KERNEL DEFAULT
DBAMON_PF1 FAILED_LOGIN_ATTEMPTS PASSWORD 10
DBAMON_PF1 PASSWORD_LIFE_TIME PASSWORD UNLIMITED
DBAMON_PF1 PASSWORD_REUSE_TIME PASSWORD UNLIMITED
DBAMON_PF1 PASSWORD_REUSE_MAX PASSWORD UNLIMITED
DBAMON_PF1 PASSWORD_VERIFY_FUNCTION PASSWORD VERIFY_FUNCTION
DBAMON_PF1 PASSWORD_LOCK_TIME PASSWORD .0106
DBAMON_PF1 PASSWORD_GRACE_TIME PASSWORD UNLIMITED
DEFAULT COMPOSITE_LIMIT KERNEL UNLIMITED
DEFAULT SESSIONS_PER_USER KERNEL UNLIMITED
DEFAULT CPU_PER_SESSION KERNEL UNLIMITED
DEFAULT CPU_PER_CALL KERNEL UNLIMITED
DEFAULT LOGICAL_READS_PER_SESSION KERNEL UNLIMITED
DEFAULT LOGICAL_READS_PER_CALL KERNEL UNLIMITED
DEFAULT IDLE_TIME KERNEL UNLIMITED
DEFAULT CONNECT_TIME KERNEL UNLIMITED
DEFAULT PRIVATE_SGA KERNEL UNLIMITED
DEFAULT FAILED_LOGIN_ATTEMPTS PASSWORD 10
DEFAULT PASSWORD_LIFE_TIME PASSWORD 180
DEFAULT PASSWORD_REUSE_TIME PASSWORD UNLIMITED
DEFAULT PASSWORD_REUSE_MAX PASSWORD UNLIMITED
DEFAULT PASSWORD_VERIFY_FUNCTION PASSWORD VERIFY_FUNCTION_11G
DEFAULT PASSWORD_LOCK_TIME PASSWORD 1
DEFAULT PASSWORD_GRACE_TIME PASSWORD 7

我建立的新使用者，沒有指定profile，所以會是預設的default profile，對應的"PASSWORD_VERIFY_FUNCTION" 有一些差別。
看來是對於密碼安全的加強，來看看相關的簡單測試，看看密碼驗證還都做了那些校驗。
SQL> create user mig_perf identified by mig_perf1;
create user mig_perf identified by mig_perf1
*
ERROR at line 1:
ORA-28003: password verification for the specified password failed
ORA-20005: Password same as or similar to user name

SQL> create user mig_perf identified by abc;
create user mig_perf identified by abc
*
ERROR at line 1:
ORA-28003: password verification for the specified password failed
ORA-20001: Password length less than 8

SQL> create user mig_perf identified by abcabc12;
User created.

SQL> drop user mig_perf;
User dropped.

當然了“PASSWORD VERIFY_FUNCTION_11G”其實是一個function來實現的。具體的細節可以在$ORACLE_HOME/rdbms/admin/utlpwdmg.sql中檢視。
> ls -lrt utlpwd*
-rw-r--r-- 1 oraccbs1 dba 11555 Aug 13 2006 utlpwdmg.sql

-- This script sets the default password resource parameters
-- This script needs to be run to enable the password features.
-- However the default resource parameters can be changed based
-- on the need.
-- A default password complexity function is also provided.
-- This function makes the minimum complexity checks like
-- the minimum length of the password, password not same as the
-- username, etc. The user may enhance this function according to
-- the need.
-- This function must be created in SYS schema.
-- connect sys/ as sysdba before running the script

CREATE OR REPLACE FUNCTION verify_function_11G
(username varchar2,
password varchar2,
old_password varchar2)
RETURN boolean IS
n boolean;
m integer;
differ integer;
isdigit boolean;
ischar boolean;
ispunct boolean;
db_name varchar2(40);
digitarray varchar2(20);
punctarray varchar2(25);
chararray varchar2(52);
i_char varchar2(10);
simple_password varchar2(10);
reverse_user varchar2(32);

BEGIN
digitarray:= '0123456789';
chararray:= 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
。。。。

而且在11g的資料字典裡也有所體現，可以看到如下的使用者密碼是10g,11g的
在dba_users中有一列 password_version
******************************************************************************************************
* General Details *
******************************************************************************************************
USERNAME Default Tablespace CREATED PROFILE PASSWORD_V
------------------------- -------------------- --------- ---------- ----------
MIG_PERF DATAS01 31-MAR-14 DEFAULT 10G 11G

一些相關的連結如下：
How To Enforce Mixed Case Passwords When sec_case_sensitive_logon = true? (Doc ID 1307555.1)
ORA-603 ORA-604 ORA-1001 ORA-28003 when PASSWORD_VERIFY_FUNCTION Returns FALSE (Doc ID 1264842.1) --這是一個11.2.0.2以前的bug
ORA-28003 Error When Use 'Password Complexity Verification' (Doc ID 132096.1) --alter user identified by 錯誤的WA

建立使用者時的密碼校驗問題

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