Package net.i2p.crypto

Class ChaCha20

java.lang.Object

net.i2p.crypto.ChaCha20

public final class ChaCha20
extends Object

ChaCha20, wrapper around Noise ChaChaCore. RFC 7539

Since:

0.9.39

Method Summary

Modifier and Type	Method	Description
static void	decrypt(byte[] key, byte[] iv, byte[] ciphertext, int ciphertextOffset, byte[] plaintext, int plaintextOffset, int length)	Encrypt from ciphertext to plaintext
static void	decrypt(byte[] key, byte[] iv, int ivOffset, byte[] ciphertext, int ciphertextOffset, byte[] plaintext, int plaintextOffset, int length)	Encrypt from ciphertext to plaintext
static void	encrypt(byte[] key, byte[] iv, byte[] plaintext, int plaintextOffset, byte[] ciphertext, int ciphertextOffset, int length)	Encrypt from plaintext to ciphertext
static void	encrypt(byte[] key, byte[] iv, int ivOffset, byte[] plaintext, int plaintextOffset, byte[] ciphertext, int ciphertextOffset, int length)	Encrypt from plaintext to ciphertext

Methods inherited from class java.lang.Object

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

Method Details

encrypt

public static void encrypt(byte[] key,
 byte[] iv,
 byte[] plaintext,
 int plaintextOffset,
 byte[] ciphertext,
 int ciphertextOffset,
 int length)

Encrypt from plaintext to ciphertext

Parameters:

key - first 32 bytes used as the key

iv - first 12 bytes used as the iv

encrypt

public static void encrypt(byte[] key,
 byte[] iv,
 int ivOffset,
 byte[] plaintext,
 int plaintextOffset,
 byte[] ciphertext,
 int ciphertextOffset,
 int length)

Encrypt from plaintext to ciphertext

Parameters:

key - first 32 bytes used as the key

iv - first 12 bytes starting at ivOffset used as the iv

Since:

0.9.54

decrypt

public static void decrypt(byte[] key,
 byte[] iv,
 byte[] ciphertext,
 int ciphertextOffset,
 byte[] plaintext,
 int plaintextOffset,
 int length)

Encrypt from ciphertext to plaintext

Parameters:

key - first 32 bytes used as the key

iv - first 12 bytes used as the iv

decrypt

public static void decrypt(byte[] key,
 byte[] iv,
 int ivOffset,
 byte[] ciphertext,
 int ciphertextOffset,
 byte[] plaintext,
 int plaintextOffset,
 int length)

Encrypt from ciphertext to plaintext

Parameters:

key - first 32 bytes used as the key

iv - first 12 bytes starting at ivOffset used as the iv

Since:

0.9.54