Package com.google.crypto.tink.subtle

Class Ed25519Sign

java.lang.Object

com.google.crypto.tink.subtle.Ed25519Sign

All Implemented Interfaces:

PublicKeySign

public final class Ed25519Sign
extends java.lang.Object
implements PublicKeySign

Ed25519 signing.

Usage

 Ed25519Sign.KeyPair keyPair = Ed25519Sign.KeyPair.newKeyPair();
 // securely store keyPair and share keyPair.getPublicKey()
 Ed25519Sign signer = new Ed25519Sign(keyPair.getPrivateKey());
 byte[] signature = signer.sign(message);
 

Since:

1.1.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Ed25519Sign.KeyPair	Defines the KeyPair consisting of a private key and its corresponding public key.

Field Summary

Fields

Modifier and Type	Field	Description
static TinkFipsUtil.AlgorithmFipsCompatibility	FIPS
static int	SECRET_KEY_LEN

Constructor Summary

Constructors

Constructor	Description
Ed25519Sign(byte[] privateKey)	Constructs a Ed25519Sign with the privateKey.

Method Summary

Modifier and Type	Method	Description
static PublicKeySign	create(Ed25519PrivateKey key)
byte[]	sign(byte[] data)	Computes the signature for data.

Methods inherited from class java.lang.Object

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

Field Detail

FIPS

public static final TinkFipsUtil.AlgorithmFipsCompatibility FIPS

SECRET_KEY_LEN

public static final int SECRET_KEY_LEN

See Also:

Constant Field Values

Constructor Detail

Ed25519Sign

public Ed25519Sign(byte[] privateKey)
            throws java.security.GeneralSecurityException

Constructs a Ed25519Sign with the privateKey.

Parameters:

privateKey - 32-byte random sequence.

Throws:

java.security.GeneralSecurityException - if there is no SHA-512 algorithm defined in EngineFactory.MESSAGE_DIGEST.

Method Detail

create

public static PublicKeySign create(Ed25519PrivateKey key)
                            throws java.security.GeneralSecurityException

Throws:

java.security.GeneralSecurityException

sign

public byte[] sign(byte[] data)
            throws java.security.GeneralSecurityException

Description copied from interface: PublicKeySign

Computes the signature for data.

Specified by:

sign in interface PublicKeySign

Returns:

the signature of data

Throws:

java.security.GeneralSecurityException