chat.dim.ecc

Class Secp256k1

java.lang.Object

chat.dim.ecc.Secp256k1

public class Secp256k1
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
Secp256k1()

Method Summary

Modifier and Type	Method and Description
static byte[]	computePublicKey(byte[] priKey) Compute public key from private key for SECP256k1
static byte[]	makeKeys() Make key pair for SECP256k1
static byte[]	sign(byte[] priKey, byte[] msgHash) Sign message hash for SECP256k1
static int	verify(byte[] pubKey, byte[] msgHash, byte[] signature) Verify message hash & signature for SECP256k1

Methods inherited from class java.lang.Object

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

Constructor Detail

Secp256k1

public Secp256k1()

Method Detail

makeKeys

public static byte[] makeKeys()

Make key pair for SECP256k1

Returns:

96 bytes; 0-63 for public key, 64-95 for private key

computePublicKey

public static byte[] computePublicKey(byte[] priKey)

Compute public key from private key for SECP256k1

Parameters:

priKey - - 32 bytes, private key

Returns:

64 bytes, public key

verify

public static int verify(byte[] pubKey,
                         byte[] msgHash,
                         byte[] signature)

Verify message hash & signature for SECP256k1

Parameters:

pubKey - - 64 bytes, public key,

msgHash - - 32 bytes, sha256(data)

signature - - 64 bytes, signature from der

Returns:

0 for error, 1 for matched

sign

public static byte[] sign(byte[] priKey,
                          byte[] msgHash)

Sign message hash for SECP256k1

Parameters:

priKey - - 32 bytes, private key

msgHash - - 32 bytes, sha256(data)

Returns:

<=72 bytes, signature