org.cryptacular.generator.sp80038a

Class EncryptedNonce

java.lang.Object

org.cryptacular.generator.sp80038a.EncryptedNonce

All Implemented Interfaces:

Nonce

public class EncryptedNonce
extends Object
implements Nonce

Nonce generation strategy that produces a random value according to NIST SP-800-38a, appendix C, method 1 (encrypted nonce), suitable for use with any block cipher mode described in that standard except OFB.

Instances of this class are thread safe.

Author:

Middleware Services

Constructor Summary

Constructors

Constructor and Description
EncryptedNonce(org.bouncycastle.crypto.BlockCipher cipher, SecretKey key) Creates a new instance.
EncryptedNonce(Spec<org.bouncycastle.crypto.BlockCipher> cipherSpec, SecretKey key) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
byte[]	generate() Generates a nonce value.
int	getLength()

Methods inherited from class java.lang.Object

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

Constructor Detail

EncryptedNonce

public EncryptedNonce(Spec<org.bouncycastle.crypto.BlockCipher> cipherSpec,
                      SecretKey key)

Creates a new instance.

Parameters:

cipherSpec - Block cipher specification.

key - Symmetric key.

EncryptedNonce

public EncryptedNonce(org.bouncycastle.crypto.BlockCipher cipher,
                      SecretKey key)

Creates a new instance.

Parameters:

cipher - Block cipher to use.

key - Symmetric key.

Method Detail

generate

public byte[] generate()
                throws LimitException

Generates a nonce value.

Specified by:

generate in interface Nonce

Returns:

Nonce bytes.

Throws:

LimitException - When a limit imposed by the nonce generation strategy, if any, is exceeded.

getLength

public int getLength()

Specified by:

getLength in interface Nonce

Returns:

Length in bytes of generated nonce values.