com.github.jlangch.venice.util.crypt

Class FileEncryptor_ChaCha20

java.lang.Object

com.github.jlangch.venice.util.crypt.FileEncryptor_ChaCha20

public class FileEncryptor_ChaCha20
extends java.lang.Object

Encrypt and decrypt files using "ChaCha20". Available on Java 11+ Uses a counter and a nonce for each file and writes the counter and the nonce to start of the encrypted file.

    Encrypted binary file format when passphrase is used

    +-----------------------+
    |         salt          |   16 bytes
    +-----------------------+
    |         nonce         |   12 bytes
    +-----------------------+
    |        counter        |   4 bytes
    +-----------------------+
    |  encrypted file data  |   n bytes
    +-----------------------+
 

    Encrypted binary file format when key is used

    +-----------------------+
    |         nonce         |   12 bytes
    +-----------------------+
    |        counter        |   4 bytes
    +-----------------------+
    |  encrypted file data  |   n bytes
    +-----------------------+
 

Constructor Summary

Constructors

Constructor and Description
FileEncryptor_ChaCha20()

Method Summary

Modifier and Type	Method and Description
static byte[]	decryptFileWithKey(byte[] key, byte[] fileData)
static void	decryptFileWithKey(byte[] key, java.io.File inputFile, java.io.File outputFile)
static byte[]	decryptFileWithPassphrase(java.lang.String passphrase, byte[] fileData)
static void	decryptFileWithPassphrase(java.lang.String passphrase, java.io.File inputFile, java.io.File outputFile)
static byte[]	encryptFileWithKey(byte[] key, byte[] fileData)
static void	encryptFileWithKey(byte[] key, java.io.File inputFile, java.io.File outputFile)
static byte[]	encryptFileWithPassphrase(java.lang.String passphrase, byte[] fileData)
static void	encryptFileWithPassphrase(java.lang.String passphrase, java.io.File inputFile, java.io.File outputFile)
static boolean	isSupported()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FileEncryptor_ChaCha20

public FileEncryptor_ChaCha20()

Method Detail

isSupported

public static boolean isSupported()

encryptFileWithPassphrase

public static void encryptFileWithPassphrase(java.lang.String passphrase,
                                             java.io.File inputFile,
                                             java.io.File outputFile)
                                      throws java.lang.Exception

Throws:

java.lang.Exception

encryptFileWithPassphrase

public static byte[] encryptFileWithPassphrase(java.lang.String passphrase,
                                               byte[] fileData)
                                        throws java.lang.Exception

Throws:

java.lang.Exception

encryptFileWithKey

public static void encryptFileWithKey(byte[] key,
                                      java.io.File inputFile,
                                      java.io.File outputFile)
                               throws java.lang.Exception

Throws:

java.lang.Exception

encryptFileWithKey

public static byte[] encryptFileWithKey(byte[] key,
                                        byte[] fileData)
                                 throws java.lang.Exception

Throws:

java.lang.Exception

decryptFileWithPassphrase

public static void decryptFileWithPassphrase(java.lang.String passphrase,
                                             java.io.File inputFile,
                                             java.io.File outputFile)
                                      throws java.lang.Exception

Throws:

java.lang.Exception

decryptFileWithPassphrase

public static byte[] decryptFileWithPassphrase(java.lang.String passphrase,
                                               byte[] fileData)
                                        throws java.lang.Exception

Throws:

java.lang.Exception

decryptFileWithKey

public static void decryptFileWithKey(byte[] key,
                                      java.io.File inputFile,
                                      java.io.File outputFile)
                               throws java.lang.Exception

Throws:

java.lang.Exception

decryptFileWithKey

public static byte[] decryptFileWithKey(byte[] key,
                                        byte[] fileData)
                                 throws java.lang.Exception

Throws:

java.lang.Exception