File Crypt

Simple software to encrypt files with AES-256.

How to use it

Encryption

java -jar FileCrypt.jar -enc -in <input file> -out <output file> -pass yourpassword

also work with a directory as an iput file and will make a directory with all encrypted files in and zip file too.

Decryption

java -jar FileCrypt.jar -dec -in <input file> -out <output file> -pass yourpassword

also work with directory as input file, that will create a new directory (named with output file name) and put all decrypted file in.

• How to build

Clone the repository git clone

• Build

cd FileCrypt/src

javac -cp ../out/lib/*.jar CryptoAES.java

javac Main.java

jar cvfm ../out/FileCrypt.jar META-INF/MANIFEST.MF *.class

FileCrypt.jar is located in the "out" folder

• Build with a different version of Bouncy Castle

Replace the file "out/lib/bcprov-jdk15on-159.jar" with the new one.

Edit the manifest in "src/META-INF/MANIFEST.MF"

Manifest-Version: 1.0 Main-Class: Main Class-Path: lib/<THE_NEW_FILE.jar>

HOW TO USE IT

• Put FileCrypt.jar and lib directory (located in the out directory) in the directory where u want to encrypt or decrypt a file
• Open a terminal in this directory and type :

java -jar FileCrypt.jar -enc|dec -in <input file> -out <output file> -pass yourpassword

How it works

• Generate 64 secure random bytes as Salt Generate
• 12 secure random bytes as IV
• Generate Encryption Key (EK) with PBKDF2

EK = PBKDF2(password, Salt, 50000, 256)

• Encrypt/Decrypt with AES/GCM/NoPadding

• During directory encryption a new Salt, IV and EK are generated for each file.

Built With Bouncy Castle - Java implementation of cryptographic algorithms.
License : This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

Source inspiration : Alexzava