Module org.panteleyev.commons

Package org.panteleyev.commons.crypto

Interface AES

public interface AES

This interface provides methods for AES encryption and decryption.

Method Summary

Modifier and Type	Method	Description
static AES	aes(Function<String,byte[]> keyGen)	Return AES instance with specified key generation function.
static AES	aes256()	Return AES instance with default 256-bit key generation function.
byte[]	decrypt(byte[] bytes, String password)	Decrypt byte array.
byte[]	decrypt(InputStream in, String password)	Decrypt input stream.
String	decryptString(byte[] bytes, String password)	Decrypt string
byte[]	encrypt(byte[] src, String password)	Encrypt byte array.
void	encrypt(byte[] src, String password, OutputStream out)	Encrypt bytes and write the result into the stream.
default byte[]	encrypt(String str, String password)	Encrypt string.
default void	encrypt(String str, String password, OutputStream out)	Encrypt string and write the result into the stream.
static byte[]	generate256key(String password)	Default 256-bit key generator.
InputStream	getInputStream(InputStream in, String password)
OutputStream	getOutputStream(OutputStream out, String password)

Method Details

encrypt

default byte[] encrypt(String str,
 String password)

Encrypt string.

Parameters:

str - string

password - password

Returns:

encrypted bytes

encrypt

byte[] encrypt(byte[] src,
 String password)

Encrypt byte array.

Parameters:

src - byte array

password - password

Returns:

encrypted bytes

encrypt

void encrypt(byte[] src,
 String password,
 OutputStream out)
      throws IOException

Encrypt bytes and write the result into the stream.

Parameters:

src - bytes to encrypt

password - password

out - stream

Throws:

IOException - in case of error

encrypt

default void encrypt(String str,
 String password,
 OutputStream out)
              throws IOException

Encrypt string and write the result into the stream.

Parameters:

str - string to encrypt

password - password

out - stream

Throws:

IOException - in case of error

decrypt

byte[] decrypt(byte[] bytes,
 String password)

Decrypt byte array.

Parameters:

bytes - bytes to decrypt

password - password to decrypt

Returns:

decrypted bytes

decryptString

String decryptString(byte[] bytes,
 String password)

Decrypt string

Parameters:

bytes - bytes to decrypt

password - password to decrypt

Returns:

decrypted bytes

decrypt

byte[] decrypt(InputStream in,
 String password)
        throws IOException

Decrypt input stream. Stream must be obtained via getInputStream(InputStream, String).

Parameters:

in - stream to decrypt

password - password to decrypt

Returns:

decrypted bytes

Throws:

IOException - in case of error

getInputStream

InputStream getInputStream(InputStream in,
 String password)
                    throws IOException

Throws:

IOException

getOutputStream

OutputStream getOutputStream(OutputStream out,
 String password)
                      throws IOException

Throws:

IOException

generate256key

static byte[] generate256key(String password)

Default 256-bit key generator. This implementation uses SHA-256 message digest algorithm.

Parameters:

password - password string

Returns:

key bytes

aes

static AES aes(Function<String,byte[]> keyGen)

Return AES instance with specified key generation function.

Parameters:

keyGen - key generation function

Returns:

in case of error

aes256

static AES aes256()

Return AES instance with default 256-bit key generation function. Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files for the appropriate JRE must be installed to use 256-bit keys.

Returns:

AES instance