com.google.crypto.tink.signature

Class EcdsaPrivateKey

java.lang.Object

com.google.crypto.tink.Key

com.google.crypto.tink.signature.SignaturePrivateKey

com.google.crypto.tink.signature.EcdsaPrivateKey

All Implemented Interfaces:

PrivateKey

@Immutable
public final class EcdsaPrivateKey
extends SignaturePrivateKey

Represents a key for computing ECDSA signatures.

ECDSA is defined in http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf, section 6.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	EcdsaPrivateKey.Builder Builder for EcdsaPrivateKey.

Method Summary

Modifier and Type	Method and Description
static EcdsaPrivateKey.Builder	builder()
boolean	equalsKey(Key o) Returns true if the key is guaranteed to be equal to other.
EcdsaParameters	getParameters() Returns the parameters of this key.
SecretBigInteger	getPrivateValue()
EcdsaPublicKey	getPublicKey() Returns the SignaturePublicKey, which contains the verify function of the digital signature primitive.

Methods inherited from class com.google.crypto.tink.signature.SignaturePrivateKey

getIdRequirementOrNull, getOutputPrefix

Methods inherited from class java.lang.Object

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

Method Detail

builder

public static EcdsaPrivateKey.Builder builder()

getParameters

public EcdsaParameters getParameters()

Description copied from class: SignaturePrivateKey

Returns the parameters of this key.

Returns the same as getPublicKey().getParameters().

Overrides:

getParameters in class SignaturePrivateKey

getPublicKey

public EcdsaPublicKey getPublicKey()

Description copied from class: SignaturePrivateKey

Returns the SignaturePublicKey, which contains the verify function of the digital signature primitive.

Specified by:

getPublicKey in interface PrivateKey

Specified by:

getPublicKey in class SignaturePrivateKey

getPrivateValue

public SecretBigInteger getPrivateValue()

equalsKey

public boolean equalsKey(Key o)

Description copied from class: Key

Returns true if the key is guaranteed to be equal to other.

Implementations are required to do this in constant time.

Note: this is allowed to return false even if two keys are guaranteed to represent the same function, but are represented differently. For example, a key is allowed to internally store the number of zero-bytes used as padding when a large number is represented as a byte array, and use this in the comparison.

Note: Tink Key objects should typically not override hashCode (because it could risk leaking key material). Hence, they typically also should not override equals.

Specified by:

equalsKey in class Key