com.tencent.kona.sun.security.ec

Class ECDSAOperations

java.lang.Object

com.tencent.kona.sun.security.ec.ECDSAOperations

public class ECDSAOperations
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ECDSAOperations.Nonce
static class	ECDSAOperations.Seed

Constructor Summary

Constructors

Constructor and Description
ECDSAOperations(ECOperations ecOps, java.security.spec.ECPoint basePoint)

Method Summary

Modifier and Type	Method and Description
static ImmutableIntegerModuloP	b2a(IntegerModuloP b, IntegerFieldModuloP orderField, byte[] temp1)
AffinePoint	basePointMultiply(byte[] scalar)
static java.util.Optional<ECDSAOperations>	forParameters(java.security.spec.ECParameterSpec ecParams)
ECOperations	getEcOperations()
byte[]	signDigest(byte[] privateKey, byte[] digest, ECDSAOperations.Nonce nonce) Sign a digest using the provided private key and nonce.
byte[]	signDigest(byte[] privateKey, byte[] digest, ECDSAOperations.Seed seed) Sign a digest using the provided private key and seed.
static AffinePoint	toAffinePoint(java.security.spec.ECPoint point, IntegerFieldModuloP field)
boolean	verifySignedDigest(byte[] digest, byte[] sig, java.security.spec.ECPoint pp)

Methods inherited from class java.lang.Object

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

Constructor Detail

ECDSAOperations

public ECDSAOperations(ECOperations ecOps,
                       java.security.spec.ECPoint basePoint)

Method Detail

getEcOperations

public ECOperations getEcOperations()

basePointMultiply

public AffinePoint basePointMultiply(byte[] scalar)

toAffinePoint

public static AffinePoint toAffinePoint(java.security.spec.ECPoint point,
                                        IntegerFieldModuloP field)

forParameters

public static java.util.Optional<ECDSAOperations> forParameters(java.security.spec.ECParameterSpec ecParams)

signDigest

public byte[] signDigest(byte[] privateKey,
                         byte[] digest,
                         ECDSAOperations.Seed seed)
                  throws ECOperations.IntermediateValueException

Sign a digest using the provided private key and seed. IMPORTANT: The private key is a scalar represented using a little-endian byte array. This is backwards from the conventional representation in ECDSA. The routines that produce and consume this value uses little-endian, so this deviation from convention removes the requirement to swap the byte order. The returned signature is in the conventional byte order.

Parameters:

privateKey - the private key scalar as a little-endian byte array

digest - the digest to be signed

seed - the seed that will be used to produce the nonce. This object should contain an array that is at least 64 bits longer than the number of bits required to represent the group order.

Returns:

the ECDSA signature value

Throws:

ECOperations.IntermediateValueException - if the signature cannot be produced due to an unacceptable intermediate or final value. If this exception is thrown, then the caller should discard the nonce and try again with an entirely new nonce value.

signDigest

public byte[] signDigest(byte[] privateKey,
                         byte[] digest,
                         ECDSAOperations.Nonce nonce)
                  throws ECOperations.IntermediateValueException

Sign a digest using the provided private key and nonce. IMPORTANT: The private key and nonce are scalars represented by a little-endian byte array. This is backwards from the conventional representation in ECDSA. The routines that produce and consume these values use little-endian, so this deviation from convention removes the requirement to swap the byte order. The returned signature is in the conventional byte order.

Parameters:

privateKey - the private key scalar as a little-endian byte array

digest - the digest to be signed

nonce - the nonce object containing a little-endian scalar value.

Returns:

the ECDSA signature value

Throws:

ECOperations.IntermediateValueException - if the signature cannot be produced due to an unacceptable intermediate or final value. If this exception is thrown, then the caller should discard the nonce and try again with an entirely new nonce value.

verifySignedDigest

public boolean verifySignedDigest(byte[] digest,
                                  byte[] sig,
                                  java.security.spec.ECPoint pp)

b2a

public static ImmutableIntegerModuloP b2a(IntegerModuloP b,
                                          IntegerFieldModuloP orderField,
                                          byte[] temp1)