Create a file protected by a password in java

Question

I would like to create a file protected by a password in JAVA. What I mean is, once I launch the program, one file created by my program would be directly protected by previously determined password.

Is there an easy way to do it ?

Once again, my aim is not to create a file and then add it a password, but right during the creation protecting the file by a password. Actually, I want the current runner program not having access in reading/editing the created file EXCEPT if he/she has the password previously set.

So anyway, if some of you know an easy way to protect files when writing them thanks to java, I would be most grateful.

Have a nice day!

Answer 1

You want to encrypt your file('s content) with a password. Here is a pretty well known library to do it: http://www.jasypt.org/

From their site:

..encrypting and decrypting a text...

BasicTextEncryptor textEncryptor = new BasicTextEncryptor();
textEncryptor.setPassword(myEncryptionPassword);
String myEncryptedText = textEncryptor.encrypt(myText);
...
String plainText = textEncryptor.decrypt(myEncryptedText);

You can read/write the encrypted content to your file.