net.i2p.crypto

Class KeyGenerator

java.lang.Object

net.i2p.crypto.KeyGenerator

public final class KeyGenerator
extends Object

Define a way of generating asymmetrical key pairs as well as symmetrical keys

Author:

jrandom

Field Summary

Fields

Modifier and Type	Field and Description
static int	PUBKEY_EXPONENT_SIZE Deprecated. use getElGamalExponentSize() which allows override in the properties

Constructor Summary

Constructors

Constructor and Description
KeyGenerator(I2PAppContext context)

Method Summary

Modifier and Type	Method and Description
Object[]	generatePKIKeypair() Generate a pair of keys, where index 0 is a PublicKey, and index 1 is a PrivateKey
SimpleDataStructure[]	generatePKIKeys() Same as above but different return type
SessionKey	generateSessionKey() Generate a private 256 bit session key
SessionKey	generateSessionKey(byte[] salt, byte[] passphrase) PBE the passphrase with the salt.
Object[]	generateSigningKeypair() Generate a pair of DSA keys, where index 0 is a SigningPublicKey, and index 1 is a SigningPrivateKey.
SimpleDataStructure[]	generateSigningKeys() DSA-SHA1 only.
SimpleDataStructure[]	generateSigningKeys(SigType type) Generic signature type, supports DSA, RSA, ECDSA, EdDSA
int	getElGamalExponentSize()
static KeyGenerator	getInstance()
static PublicKey	getPublicKey(PrivateKey priv) Convert a PrivateKey to its corresponding PublicKey
static SigningPublicKey	getSigningPublicKey(SigningPrivateKey priv) Convert a SigningPrivateKey to a SigningPublicKey.
static void	main(String[] args) Usage: KeyGenerator [sigtype...]
boolean	useLongElGamalExponent()

Methods inherited from class java.lang.Object

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

Field Detail

PUBKEY_EXPONENT_SIZE

@Deprecated
public static final int PUBKEY_EXPONENT_SIZE

Deprecated. use getElGamalExponentSize() which allows override in the properties

Constructor Detail

KeyGenerator

public KeyGenerator(I2PAppContext context)

Method Detail

getInstance

public static KeyGenerator getInstance()

generateSessionKey

public SessionKey generateSessionKey()

Generate a private 256 bit session key

Returns:

session key

generateSessionKey

public SessionKey generateSessionKey(byte[] salt,
                                     byte[] passphrase)

PBE the passphrase with the salt. Warning - SLOW

useLongElGamalExponent

public boolean useLongElGamalExponent()

Since:

0.9.8

getElGamalExponentSize

public int getElGamalExponentSize()

Since:

0.9.8

generatePKIKeypair

public Object[] generatePKIKeypair()

Generate a pair of keys, where index 0 is a PublicKey, and index 1 is a PrivateKey

Returns:

pair of keys

generatePKIKeys

public SimpleDataStructure[] generatePKIKeys()

Same as above but different return type

Since:

0.8.7

getPublicKey

public static PublicKey getPublicKey(PrivateKey priv)

Convert a PrivateKey to its corresponding PublicKey

Parameters:

priv - PrivateKey object

Returns:

the corresponding PublicKey object

Throws:

IllegalArgumentException - on bad key

generateSigningKeypair

public Object[] generateSigningKeypair()

Generate a pair of DSA keys, where index 0 is a SigningPublicKey, and index 1 is a SigningPrivateKey. DSA-SHA1 only.

Returns:

pair of keys

generateSigningKeys

public SimpleDataStructure[] generateSigningKeys()

DSA-SHA1 only. Same as above but different return type

Since:

0.8.7

generateSigningKeys

public SimpleDataStructure[] generateSigningKeys(SigType type)
                                          throws GeneralSecurityException

Generic signature type, supports DSA, RSA, ECDSA, EdDSA

Throws:

GeneralSecurityException

Since:

0.9.9

getSigningPublicKey

public static SigningPublicKey getSigningPublicKey(SigningPrivateKey priv)

Convert a SigningPrivateKey to a SigningPublicKey. As of 0.9.16, supports all key types.

Parameters:

priv - a SigningPrivateKey object

Returns:

a SigningPublicKey object

Throws:

IllegalArgumentException - on bad key or unknown type

main

public static void main(String[] args)

Usage: KeyGenerator [sigtype...]