com.casper.sdk.service.signing

Class Secp256k1KeyPairBuilder

java.lang.Object

com.casper.sdk.service.signing.Secp256k1KeyPairBuilder

All Implemented Interfaces:

KeyPairBuilder

public class Secp256k1KeyPairBuilder
extends Object

Signer for the Secp256k1 algorithm

Field Summary

Fields

Modifier and Type	Field and Description
static String	ALGORITHM
static String	CURVE_NAME

Method Summary

Modifier and Type	Method and Description
byte[]	convertFromDER(byte[] asn1EncodedSignature) Converts an DER ASN.1 signature to a P1363 Signature
byte[]	convertToDER(byte[] p1363EncodedSignature) Converts a P1363 encoded signature to a DER ASN1 signature
PublicKey	createPublicKey(byte[] publicKey) Creates a public key from the provided raw bytes
KeyPair	generateKeyPair(byte[] seed) Generates a new key pair
Algorithm	getAlgorithm() The algorithm of the signer
byte[]	getPublicKeyRawBytes(PublicKey publicKey) Obtains the raw bytes from a public key so can be used in casper types
boolean	isSupportedPublicKey(PublicKey publicKey) Indicates if the provided public key has an algorithm that is supported by this signer

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 String CURVE_NAME

See Also:

Constant Field Values

ALGORITHM

public static final String ALGORITHM

See Also:

Constant Field Values

Method Detail

generateKeyPair

public 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(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 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

convertFromDER

public byte[] convertFromDER(byte[] asn1EncodedSignature)

Converts an DER ASN.1 signature to a P1363 Signature

Specified by:

convertFromDER in interface KeyPairBuilder

Parameters:

asn1EncodedSignature - the DER signature bytes

Returns:

the P1363 signature

convertToDER

public byte[] convertToDER(byte[] p1363EncodedSignature)

Converts a P1363 encoded signature to a DER ASN1 signature

Specified by:

convertToDER in interface KeyPairBuilder

Parameters:

p1363EncodedSignature - the signature the convert

Returns:

a DER ASN.1 signature

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(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