Class EdDSAUtils

java.lang.Object

org.apache.sshd.common.util.security.eddsa.generic.EdDSAUtils

public final class EdDSAUtils
extends Object

Utilities to extract the raw key bytes from ed25519 or ed448 keys or to construct such keys from the raw key bytes, in a manner that is independent of the actual concrete key implementation classes.

Author:

Apache MINA SSHD Project

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ED25519_LENGTH
static final String	ED25519_OID
static final int	ED448_LENGTH
static final String	ED448_OID

Method Summary

Modifier and Type	Method	Description
static KeySpec	createKeySpec(PrivateKey key)	Creates a KeySpec for re-creating the given ed25519 or ed448 private key.
static KeySpec	createKeySpec(PublicKey key)	Creates a KeySpec for re-creating the given ed25519 or ed448 public key.
static KeySpec	createPrivateKeySpec(byte[] keyData)	Creates a KeySpec for re-creating an ed25519 or ed448 public key from the raw key bytes.
static KeySpec	createPublicKeySpec(byte[] keyData)	Creates a KeySpec for re-creating an ed25519 or ed448 public key from the raw key bytes.
static boolean	equals(PrivateKey k1, PrivateKey k2)	Compares two ed25519 or two ed448 PrivateKeys.
static boolean	equals(PublicKey k1, PublicKey k2)	Compares two ed25519 or two ed448 PublicKeys.
static byte[]	getBytes(PrivateKey key)	Retrieves the raw key bytes from an ed25519 or ed448 PrivateKey.
static byte[]	getBytes(PublicKey key)	Retrieves the raw key bytes from an ed25519 or ed448 PublicKey.
static PrivateKey	getPrivateKey(byte[] keyData)	Creates a PrivateKey from the raw key bytes of an ed25519 or ed448 key.
static PublicKey	getPublicKey(byte[] keyData)	Creates a PublicKey from the raw key bytes of an ed25519 or ed448 key.

Methods inherited from class Object

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

Field Details

ED25519_OID

public static final String ED25519_OID

See Also:

• RFC8412 section 3
• Constant Field Values

ED448_OID

public static final String ED448_OID

See Also:

• RFC8412 section 3
• Constant Field Values

ED25519_LENGTH

public static final int ED25519_LENGTH

See Also:

• Constant Field Values

ED448_LENGTH

public static final int ED448_LENGTH

See Also:

• Constant Field Values

Method Details

getBytes

public static byte[] getBytes(PublicKey key)
                       throws IllegalArgumentException

Retrieves the raw key bytes from an ed25519 or ed448 PublicKey.

Parameters:

key - PublicKey to get the bytes of

Returns:

the raw key bytes

Throws:

IllegalArgumentException - if the key is not an ed25519 or ed448 key, or if it doesn't use X.509 encoding

getBytes

public static byte[] getBytes(PrivateKey key)
                       throws IllegalArgumentException

Retrieves the raw key bytes from an ed25519 or ed448 PrivateKey.

Parameters:

key - PrivateKey to get the bytes of

Returns:

the raw key bytes

Throws:

IllegalArgumentException - if the key is not an ed25519 or ed448 key, or if it doesn't use PKCS#8 encoding

createKeySpec

public static KeySpec createKeySpec(PublicKey key)
                             throws InvalidKeyException

Creates a KeySpec for re-creating the given ed25519 or ed448 public key.

Parameters:

key - ed25519 or ed448 key to create a KeySpec for

Returns:

the KeySpec

Throws:

InvalidKeyException - if the key is neither an ed25519 nor an ed448 key

createKeySpec

public static KeySpec createKeySpec(PrivateKey key)
                             throws InvalidKeyException

Creates a KeySpec for re-creating the given ed25519 or ed448 private key.

Parameters:

key - ed25519 or ed448 key to create a KeySpec for

Returns:

the KeySpec

Throws:

InvalidKeyException - if the key is neither an ed25519 nor an ed448 key

createPublicKeySpec

public static KeySpec createPublicKeySpec(byte[] keyData)
                                   throws InvalidKeyException

Creates a KeySpec for re-creating an ed25519 or ed448 public key from the raw key bytes.

Parameters:

keyData - the raw key bytes

Returns:

the KeySpec

Throws:

InvalidKeyException - if the key bytes do not have the appropriate length for an ed25519 or ed448 key

createPrivateKeySpec

public static KeySpec createPrivateKeySpec(byte[] keyData)
                                    throws InvalidKeyException

Creates a KeySpec for re-creating an ed25519 or ed448 public key from the raw key bytes.

Parameters:

keyData - the raw key bytes

Returns:

the KeySpec

Throws:

InvalidKeyException - if the key bytes do not have the appropriate length for an ed25519 or ed448 key

getPublicKey

public static PublicKey getPublicKey(byte[] keyData)
                              throws GeneralSecurityException

Creates a PublicKey from the raw key bytes of an ed25519 or ed448 key.

Parameters:

keyData - the raw key bytes

Returns:

the PublicKey

Throws:

GeneralSecurityException - if the key cannot be created

getPrivateKey

public static PrivateKey getPrivateKey(byte[] keyData)
                                throws GeneralSecurityException

Creates a PrivateKey from the raw key bytes of an ed25519 or ed448 key.

Parameters:

keyData - the raw key bytes

Returns:

the PrivateKey

Throws:

GeneralSecurityException - if the key cannot be created

equals

public static boolean equals(PublicKey k1,
 PublicKey k2)
                      throws IllegalArgumentException

Compares two ed25519 or two ed448 PublicKeys.

Parameters:

k1 - first PublicKey

k2 - second PublicKey

Returns:

if the two keys are equal

Throws:

IllegalArgumentException - if one of the keys is neither an ed25519 nor an ed448 key

equals

public static boolean equals(PrivateKey k1,
 PrivateKey k2)
                      throws IllegalArgumentException

Compares two ed25519 or two ed448 PrivateKeys.

Parameters:

k1 - first PrivateKey

k2 - second PrivateKey

Returns:

if the two keys are equal

Throws:

IllegalArgumentException - if one of the keys is neither an ed25519 nor an ed448 key