oracle 口令hash 算法

1. str = uppercase( 用户名||口令 )

2. str = unicode(str) + 0x00   //unicode : 0x00+ascii

3. iv=0,key = 0x01234567890abcdef; tmp = des_cbc(key,iv,str);

4. key = last_8byte(tmp);iv=0;

5.tmp = des_cbc(key,iv,str);

6.hash = last_8byte(tmp);