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Create new user with privileges in database

I'm trying to implement a login feature in my project. In order to make it "secure" I whant to try to use the user system provided by phpmyadmin (my tool to manage my databases) rather than login in with the root user and then store usernames and passwords in a table and verify them etc.
I tried to add a new user in phpmyadmin and then I looked the SQL code that represented the code to add a new user :
CREATE USER 'username_test'#'localhost' IDENTIFIED WITH mysql_native_password AS '***';
GRANT SELECT ON *.* TO 'username_test'#'localhost' REQUIRE NONE WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;
GRANT ALL PRIVILEGES ON `restaurant_app`.* TO 'username_test'#'localhost';
So my goal was to use this SQL to register-login users in my app. But I can't figure out how to provide the password, I don't fully understand the first part of this command. More over, I would like you to tell me if using the phpmyadmin user feature is a good idea or if I should use the classic way to do this : connect to the database using (user:"root", passwd:"") and look into my own table containing all the users logins ?

No, it is not a good idea. You can use bcrypt to store hashed passwords instead of plain text passwords. In the bacend you would hash the password that comes from the front-end and compare that value with the one in the database.
You can read this post to see some examples.

JDBC select query monitor

I have encrypted password and stored into mysql table,actually couple of table are there to store different user credentials but column name(PASSWORD) is same in all tables.
There are so many scenario's are there in my project to connect different servers with user credentials.So My requirement is rather than decrypt password in all places(after select statement), need to decrypt in a common area ,it could be Listener or some thing.
When PASSWORD column find in select statement need to decrypt password.
please suggest how to achieve?
Thanks,
Raj

Glassfish 3.1.2 JDBCRealm configuration

Hi I have read Glassfish 3.1.2's JDBCRealm has a new Password Encryption Algorithm field. What is it for? and googled for similar topics but it seems no definitive answer has been published.
In short, I have a jdbc realm working in glassfish 3, when I upgrade to 3.1.2, same configuration does not work. According to the previous thread, I have set the JaasContext to jdbcDigestRealm (in addition to jdbcRealm which also does not work), set the Digest Algorithm to MD5 (I used MD5 in v 3 and it worked). For Password Encryption Algorithm I tried 'blank', and 'hex', both do not work.
Could someone please tell me how I should configure. My credentials table is based on mysql with MD5 hashed passwords according to http://jugojava.blogspot.hk/2011/02/jdbc-security-realm-with-glassfish-and.html.

I succeed to make it works with the following settings. I add a few comments with my current (mis)understanding.
JAASContext = "jdbcRealm" => The value must be set according to file 'glassfish3/glassfish/domains/domain1/config/login.conf'. By default, the class 'com.sun.enterprise.security.auth.login.JDBCLoginModule' (which implement the JDBCrealm) is configured under "jdbcRealm". There is another login module configured under "jdbcDigestRealm". This one is not part of the current topic.
JNDI = "..." => I put there the name of a datasource that already
exists for the database of my application.
UserTable = "MY_SCHEMA.usertable" => The 'full qualified name' of the
database table.
UserNameColumn = "userid" => column name where you store the user
name
PasswordColumn = "password" => column name where you store the (hash
of the) user passsword.
GroupTable = "MY_SCHEMA.grouptable" => The 'full qualified name' of
the database table.
GroupTableUserNameColumn = "" => no clue about the usage of this...
GroupNameColumn = "groupid" => column name where you store the user
name
AssignGroups = "" => As far as I understand the GF code, this is a way to assign a list of groups to every user registered in the realm. It's kind of hard-coding. More or less every realm available on GlassFish (could) make use of this property.
DatabaseUser = "" => As I understood, you need this if you aren't
using the JNDI (the second parameter).
DatabasePassword = "" => As I understood, you need this if you aren't
using the JNDI (the second parameter).
DigestAlgorithm = "SHA-256" => 'MD5', 'SHA-1' or 'SHA-256'. 'SHA-256'
is the default. Let's take 'SHA-256'.
PasswordEncryptionAlgorithm = "AES" => The digest algorithm is applied to the password before storing the password. The new password encryption is an added layer of security which allows the "hash" (the string after the DA has been applied to the password) to be encrypted. In this way, if an attacker retrieves the passwords from the database they are encrypted and hashed. It's highly unlikely that such data would be useful to an attacker.
Encoding = "Hex" => You have the choice between 'Hex' or 'Base64'.
Hex was convenient for me.
Charset = "" => As my database does not have an 'exotic' charset, I
do not think I need to set something smart there. I leave it blank
and it works.
Hope it will help.
PS: If somebody have a link to REAL documentation (not the official one which is completly useless at this moment), please, put a link here.

I spent a while today playing with this (Java EE 7, Glassfish 4 on Ubuntu 12.04). As it turns out, most of the fields on the Realm Page are not needed. The following fields were the only ones that are needed to establish a successful connection to the database.
Realm Name - Any name, as long as you use the same name in web.xml
JAAS Context - Any Name
JNDI - Any Name (I used jdbc/DB Name)
User Table - Table which contains all the users
User Name column - Column in the users table which contains your user-names
Password - Column which contains hashed passwords (SHA 256)
Group Table - Table which contains groups
Group Name Column - Column in the groups table which contain group names
I left everything else blank. My database password column had the password hashed using SHA 256.
I tested this by filling in random text in the 'Password Encryption' field and saving it. Redeployed my application and restarted Glassfish 4. Still worked. This means that the field, while still present is not being read anymore.
P.S - The real documentation as mentioned in the first answer is still quite poor.

First things first. What is your log output?
What are the symptoms of your "not working problem"?
Did basic-authentication pop-up window occurred?
Did you get
No login module configured for jdbcDigestRealm
or other error message?
change security log level if don't have any log output from unsuccessful login attempt.

I have two variations to the jdbcRealm issue. The first existed from a domain that was created using GF 3.1.1 which continued to work after updating the GF server to the 3.1.2.2 release. I then created a new domain on this server. The new domain was configured using the jdbcRealm. All of the parameters were the same for the 3.1.1 configuration except for the "Password Encryption Algorithm" which didn't exist under the 3.1.1 configuration screen. When I tried to login using my Web Application I was constantly getting the "jdbcrealm.invaliduserreason[#]" error in the log file.
The only way that I was able to resolve and to successfully login to my application was by adding the AES to the "Password Encryption Algorithm" field. I saved the change and restarted the server and once again I am able to successfully authenticate users from the jdbcRealm connection.

There is a somewhat more detailed guide here -> http://is.gd/Jx6Gnp

Why isn't the database being updated when I refresh the entity manager?

I'm currently developing a social networking site and I'm currently implementing the part where a user can change his password. I'm using the entity manager to refresh the contents of the database with the new password. The following is the code for the implementation.
final Implementation user = em.find(Implementation.class, username);
if((user!=null) && user.getPassword().equals(hash(username,oldPassword))){
user.setPassword(hash(username,newPassword));
em.refresh(user);
}else{
throw new ChangePasswordException();
}
however when I try to login again, the older password must be used, otherwise, if the new password is supplied it will tell you: passwords do not match. Does anyone know maybe why this is happening? I tried to first remove the user from the database, and then persist the new user again. However an EJB Exception was generated as the username was not unique since the user was not removed from the database.
Thanks a lot for your help

You are not saving your new password. You are overwriting your changes you have made. So refresh(user) will fetch the current state of that user and will write it into your object.
docu: Refresh the state of the instance from the database, overwriting changes made to the entity, if any.
Try to use merge or persist instead

Password manager-auto id and password in java

HI i am developing password manager application in android......How can i generate auto user id and password for particular websites account in android for password manger application? IN .details....
first i created database which is contain id,websites names,user id and password
so when i enter websites names in edit text it ll save to database then how can i created auto id and password for single website name in database
so if any one know source code for this above statement let me know..

Maybe you can base the userID and password on the unique AndroidID ? See this question.