This is a program to generate a password base on a tag. 这是一个基于标签的密码生成本。

Two type of passwd:

• Passwd for database.

  The passwd need user to input. It will be used to access database and generate passwd for a specific tag.

  passwd for database -> sha512(passwd) -> passwd-hash -> key, iv -> aes encrypt database

• Passwd for tag

  The passwd is generate for the tag.

  passwd for database -> sha512(passwd + tag) -> new-hash -> first len chars as the passwd for tag

Usage: genpasswd [OPTION][ARG]
   or: genpasswd [OPTION]

    -i          init the database
    -l          list all tags
    -t [ARG]    generate a passwd for the arg. And add the arg to the database
    -r [ARG]    remove the arg from the database
    -h          show usage

    without argument, the program will generate a random password

$ ./genpasswd
Random passwd is fdf4ab4f24eb0e75

./genpasswd -i
New password for database: 
Retype new password for database: 
Init records successed

$ ./genpasswd -t google
Database Password: 
The password for google is cf048d00fab0f14f

$ ./genpasswd -t baidu
Database Password: 
The password for baidu is 7e106a931a7a6b0f

$ ./genpasswd -l
Database Password: 
1 baidu
2 google

$ ./genpasswd -r baidu
Database Password: 
remove baidu from database