How do I encrypt a file in Java?

Here are the general steps to encrypt/decrypt a file in Java:

1. Create a Key from a given byte array for a given algorithm.
2. Get an instance of Cipher class for a given algorithm transformation.
3. Initialize the Cipher with an appropriate mode (encrypt or decrypt) and the given Key.

How protect properties file in Java?

Before combining available methods, let’s assume we can perform the following:

1. Hard-code inside the Java program.
2. Store in a .properties file.
3. Ask user to type password from command line.
4. Ask user to type password from a form.
5. Ask user to load a password-file from command line or a form.

How do I encrypt properties file?

The encryption tool is located in the install_directory \ftm\v323\tools\encryption\ directory. To run it, place the properties file that is to become encrypted into the same directory, and then from a command console, invoke the encryption JAR and pass the name of the properties file as an argument.

Is it possible to encrypt Java configuration files?

The same issue remains if you use the KeyStore, which also is protected by a password. Basically, you will need to have one master password somewhere, and it’s pretty hard to protect. Check out jasypt, which is a library offering basic encryption capabilities with minimum effort.

How to encrypt password in configuration files?

Depending on how secure you need the configuration files or how reliable your application is, http://activemq.apache.org/encrypted-passwords.html may be a good solution for you. If you are not too afraid of the password being decrypted and it can be really simple to configure using a bean to store the password key.

How do you encrypt a password in Java?

salt is created with any random String to add to the password string. createSecretKey is a user-defined method that returns the SecretKeySpec key, and the use of the key is to encrypt and decrypt the password. encrypt and decrypt methods are used-defined static methods that have been given, in the Encryption class.

How to decrypt a properties file in Java?

Jasypt provides the org.jasypt.properties.EncryptableProperties class for loading, managing and transparently decrypting encrypted values in .properties files, allowing the mix of both encrypted and not-encrypted values in the same file.