EdDSABlinding - Javadocs [I2P+ 0.9.50]

java.lang.Object

net.i2p.crypto.eddsa.EdDSABlinding

public final class EdDSABlinding
extends Object

Utilities for Blinding EdDSA keys. PRELIMINARY - Subject to change - see proposal 123

Since:: 0.9.38

Field Summary

Fields

Modifier and Type Field Description

static BigInteger ORDER

Method Summary

Modifier and Type	Method	Description
`static EdDSAPrivateKey`	`blind(EdDSAPrivateKey key, EdDSAPrivateKey alpha)`	Only for SigType EdDSA_SHA512_Ed25519.
`static EdDSAPublicKey`	`blind(EdDSAPublicKey key, EdDSAPrivateKey alpha)`	Only for SigType EdDSA_SHA512_Ed25519.
`static byte[]`	`reduce(byte[] b)`	Use to generate alpha
`static EdDSAPrivateKey`	`unblind(EdDSAPrivateKey key, EdDSAPrivateKey alpha)`	Unimplemented, probably not needed except for testing.

Methods inherited from class java.lang.Object

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

Field Details
- ORDER
  
  public static final BigInteger ORDER
Method Details
- blind
  
  public static EdDSAPublicKey blind(EdDSAPublicKey key, EdDSAPrivateKey alpha)
  
  Only for SigType EdDSA_SHA512_Ed25519.
  
  Parameters:
  
  key - must be SigType EdDSA_SHA512_Ed25519
  
  alpha - generated from hash of secret data
  
  Throws:
  
  UnsupportedOperationException - unless supported
- blind
  
  public static EdDSAPrivateKey blind(EdDSAPrivateKey key, EdDSAPrivateKey alpha)
  
  Only for SigType EdDSA_SHA512_Ed25519.
  
  Parameters:
  
  key - must be SigType EdDSA_SHA512_Ed25519
  
  alpha - generated from hash of secret data
  
  Throws:
  
  UnsupportedOperationException - unless supported
- unblind
  
  public static EdDSAPrivateKey unblind(EdDSAPrivateKey key, EdDSAPrivateKey alpha)
  
  Unimplemented, probably not needed except for testing.
  
  Parameters:
  
  key - must be SigType EdDSA_SHA512_Ed25519
  
  alpha - generated from hash of secret data
  
  Throws:
  
  UnsupportedOperationException - unless supported
- reduce
  
  public static byte[] reduce(byte[] b)
  
  Use to generate alpha
  
  Parameters:
  
  b - 64 bytes little endian of random
  
  Returns:
  
  32 bytes little endian mod l