Package net.i2p.router.transport.udp

Class I2PHMac

java.lang.Object

net.i2p.router.transport.udp.I2PHMac

class I2PHMac
extends Object

HMAC implementation based on RFC2104 H(K XOR opad, H(K XOR ipad, text)) modified by jrandom to use the session key byte array directly and to cache a frequently used buffer (called on doFinal). changes released into the public domain in 2005. This is renamed from HMac because the constructor HMac(digest, sz) does not exist in the standard bouncycastle library, thus it conflicts in JVMs that contain the standard library (Android). As of 0.9.12, refactored to use standard MessageDigest. Deprecated - Do not use outside of router or Syndie. Not a public API - Not for external use!

Since:

0.9.43 moved from org.bouncycastle.oldcrypto.macs

Constructor Summary

Constructors

Constructor	Description
I2PHMac(MessageDigest digest)	Deprecated. Use javax.crypto.Mac
I2PHMac(MessageDigest digest, int sz)

Method Summary

Modifier and Type	Method	Description
int	doFinal(byte[] out, int outOff)
String	getAlgorithmName()
int	getMacSize()
MessageDigest	getUnderlyingDigest()
void	init(byte[] key)
void	reset()	Reset the mac generator.
void	update(byte in)
void	update(byte[] in, int inOff, int len)

Methods inherited from class java.lang.Object

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

Constructor Details

I2PHMac

@Deprecated
public I2PHMac(MessageDigest digest)

Deprecated.

Use javax.crypto.Mac

Standard HMAC, size == digest size.

I2PHMac

public I2PHMac(MessageDigest digest,
 int sz)

Parameters:

sz - override the digest's size, nonstandard if different. SEE NOTES in HMACGenerator about why this isn't compatible with standard HmacMD5

Method Details

getAlgorithmName

public String getAlgorithmName()

getUnderlyingDigest

public MessageDigest getUnderlyingDigest()

init

public void init(byte[] key)

getMacSize

public int getMacSize()

update

public void update(byte in)

update

public void update(byte[] in,
 int inOff,
 int len)

doFinal

public int doFinal(byte[] out,
 int outOff)

reset

public void reset()

Reset the mac generator.