Class ECDSAKeyAlgorithm

java.lang.Object

com.trilead.ssh2.signature.KeyAlgorithm<ECPublicKey, ECPrivateKey>

com.trilead.ssh2.signature.ECDSAKeyAlgorithm

Direct Known Subclasses:

ECDSAKeyAlgorithm.ECDSASha2Nistp256, ECDSAKeyAlgorithm.ECDSASha2Nistp384, ECDSAKeyAlgorithm.ECDSASha2Nistp521

public abstract class ECDSAKeyAlgorithm
extends KeyAlgorithm<ECPublicKey, ECPrivateKey>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	ECDSAKeyAlgorithm.EcdsaCertificateDecoder
static class	ECDSAKeyAlgorithm.ECDSASha2Nistp256
static class	ECDSAKeyAlgorithm.ECDSASha2Nistp384
static class	ECDSAKeyAlgorithm.ECDSASha2Nistp521
private static class	ECDSAKeyAlgorithm.OpenSshEcdsaCertificateDecoder

Field Summary

Fields

Modifier and Type	Field	Description
private static final byte	ANS1_INTEGER
private static final byte	ANS1_ZERO
private final String	curveName
private static final String	ECDSA_SHA2_PREFIX
private final ECParameterSpec	ecParameterSpec

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ECDSAKeyAlgorithm(String signatureAlgorithm, String curveName, ECParameterSpec ecParameterSpec)

Method Summary

Modifier and Type	Method	Description
private static ECPoint	decodePoint(byte[] encodedPoint, EllipticCurve curve)
ECPublicKey	decodePublicKey(byte[] key)
byte[]	decodeSignature(byte[] encodedSignature)
private static byte[]	encodePoint(ECPoint group, EllipticCurve curve)
byte[]	encodePublicKey(ECPublicKey key)
byte[]	encodeSignature(byte[] sig)
(package private) String	getCurveName()
(package private) ECParameterSpec	getEcParameterSpec()
private static byte[]	removeLeadingZeroes(byte[] input)
boolean	supportsKey(PrivateKey originalKey)
private static void	writeLength(int length, OutputStream os)

Methods inherited from class KeyAlgorithm

generateSignature, getCertificateDecoders, getKeyFormat, verifySignature

Methods inherited from class Object

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

Field Details

ECDSA_SHA2_PREFIX

private static final String ECDSA_SHA2_PREFIX

See Also:

• Constant Field Values

ANS1_INTEGER

private static final byte ANS1_INTEGER

See Also:

• Constant Field Values

ANS1_ZERO

private static final byte ANS1_ZERO

See Also:

• Constant Field Values

curveName

private final String curveName

ecParameterSpec

private final ECParameterSpec ecParameterSpec

Constructor Details

ECDSAKeyAlgorithm

private ECDSAKeyAlgorithm(String signatureAlgorithm,
 String curveName,
 ECParameterSpec ecParameterSpec)

Method Details

getCurveName

String getCurveName()

getEcParameterSpec

ECParameterSpec getEcParameterSpec()

decodePublicKey

public ECPublicKey decodePublicKey(byte[] key)
                            throws IOException

Specified by:

decodePublicKey in class KeyAlgorithm<ECPublicKey, ECPrivateKey>

Throws:

IOException

encodePublicKey

public byte[] encodePublicKey(ECPublicKey key)
                       throws IOException

Specified by:

encodePublicKey in class KeyAlgorithm<ECPublicKey, ECPrivateKey>

Throws:

IOException

decodeSignature

public byte[] decodeSignature(byte[] encodedSignature)
                       throws IOException

Specified by:

decodeSignature in class KeyAlgorithm<ECPublicKey, ECPrivateKey>

Throws:

IOException

writeLength

private static void writeLength(int length,
 OutputStream os)
                         throws IOException

Throws:

IOException

encodeSignature

public byte[] encodeSignature(byte[] sig)
                       throws IOException

Specified by:

encodeSignature in class KeyAlgorithm<ECPublicKey, ECPrivateKey>

Throws:

IOException

supportsKey

public boolean supportsKey(PrivateKey originalKey)

Overrides:

supportsKey in class KeyAlgorithm<ECPublicKey, ECPrivateKey>

decodePoint

private static ECPoint decodePoint(byte[] encodedPoint,
 EllipticCurve curve)

encodePoint

private static byte[] encodePoint(ECPoint group,
 EllipticCurve curve)

removeLeadingZeroes

private static byte[] removeLeadingZeroes(byte[] input)