com.casper.sdk.service.signing

Class Secp256k1KeyPairBuilder

java.lang.Object

com.casper.sdk.service.signing.Secp256k1KeyPairBuilder

All Implemented Interfaces:

KeyPairBuilder

public class Secp256k1KeyPairBuilder
extends java.lang.Object

Signer for the Secp256k1 algorithm

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ALGORITHM
static java.lang.String	CURVE_NAME

Method Summary

Modifier and Type	Method and Description
java.security.PublicKey	createPublicKey(byte[] publicKey) Creates a public key from the provided raw bytes
java.security.KeyPair	generateKeyPair(byte[] seed) Generates a new key pair
Algorithm	getAlgorithm() The algorithm of the signer
byte[]	getPublicKeyRawBytes(java.security.PublicKey publicKey) Obtains the raw bytes from a public key so can be used in casper types
boolean	isSupportedPublicKey(java.security.PublicKey publicKey) Indicates if the provided public key has an algorithm that is supported by this signer
byte[]	signWithPrivateKey(java.security.PrivateKey privateKey, byte[] message) Signs a message using the provided key
boolean	verifySignature(java.security.PublicKey publicKey, byte[] message, byte[] signature) Verifies a signed message

Methods inherited from class java.lang.Object

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

Field Detail

CURVE_NAME

public static final java.lang.String CURVE_NAME

See Also:

Constant Field Values

ALGORITHM

public static final java.lang.String ALGORITHM

See Also:

Constant Field Values

Method Detail

generateKeyPair

public java.security.KeyPair generateKeyPair(byte[] seed)

Description copied from interface: KeyPairBuilder

Generates a new key pair

Parameters:

seed - the optional entropy source to be used when generating a key pair

Returns:

a new key pain

isSupportedPublicKey

public boolean isSupportedPublicKey(java.security.PublicKey publicKey)

Description copied from interface: KeyPairBuilder

Indicates if the provided public key has an algorithm that is supported by this signer

Parameters:

publicKey - the public key to test

Returns:

true if the provide key is supported by the signer otherwise false

createPublicKey

public java.security.PublicKey createPublicKey(byte[] publicKey)

Description copied from interface: KeyPairBuilder

Creates a public key from the provided raw bytes

Parameters:

publicKey - the public key raw bytes

Returns:

a new PublicKet created from the provided bytes

signWithPrivateKey

public byte[] signWithPrivateKey(java.security.PrivateKey privateKey,
                                 byte[] message)

Description copied from interface: KeyPairBuilder

Signs a message using the provided key

Parameters:

privateKey - the private key to sign with

message - the message to sign

Returns:

the signed message

verifySignature

public boolean verifySignature(java.security.PublicKey publicKey,
                               byte[] message,
                               byte[] signature)

Description copied from interface: KeyPairBuilder

Verifies a signed message

Parameters:

publicKey - the public key to verify signature with

message - the message to sign

signature - the signed message

Returns:

true if the signature is valid otherwise false

getAlgorithm

public Algorithm getAlgorithm()

Description copied from interface: KeyPairBuilder

The algorithm of the signer

Specified by:

getAlgorithm in interface KeyPairBuilder

Returns:

the signers algorithm

getPublicKeyRawBytes

public byte[] getPublicKeyRawBytes(java.security.PublicKey publicKey)

Description copied from interface: KeyPairBuilder

Obtains the raw bytes from a public key so can be used in casper types

Specified by:

getPublicKeyRawBytes in interface KeyPairBuilder

Parameters:

publicKey - the public key to obtain the raw bytes from

Returns:

the raw bytes of the provided key