Package org.apache.sshd.common.kex
Enum MontgomeryCurve
- java.lang.Object
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- java.lang.Enum<MontgomeryCurve>
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- org.apache.sshd.common.kex.MontgomeryCurve
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- All Implemented Interfaces:
Serializable
,Comparable<MontgomeryCurve>
,KeySizeIndicator
,OptionalFeature
public enum MontgomeryCurve extends Enum<MontgomeryCurve> implements KeySizeIndicator, OptionalFeature
Provides implementation details for Montgomery curves and their key exchange algorithms Curve25519/X25519 and Curve448/X448 specified in RFC 7748 and RFC 8731. Montgomery curves provide improved security and flexibility over Weierstrass curves used in ECDH.
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Field Summary
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Fields inherited from interface org.apache.sshd.common.OptionalFeature
FALSE, TRUE
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Digest
createDigest()
KeyAgreement
createKeyAgreement()
PublicKey
decode(byte[] key)
byte[]
encode(PublicKey key)
KeyPair
generateKeyPair()
String
getAlgorithm()
int
getKeySize()
boolean
isSupported()
static MontgomeryCurve
valueOf(String name)
Returns the enum constant of this type with the specified name.static MontgomeryCurve[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Detail
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x25519
public static final MontgomeryCurve x25519
X25519 uses Curve25519 and SHA-256 with a 32-byte key size.
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x448
public static final MontgomeryCurve x448
X448 uses Curve448 and SHA-512 with a 56-byte key size.
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Method Detail
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values
public static MontgomeryCurve[] values()
Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:for (MontgomeryCurve c : MontgomeryCurve.values()) System.out.println(c);
- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
public static MontgomeryCurve valueOf(String name)
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)- Parameters:
name
- the name of the enum constant to be returned.- Returns:
- the enum constant with the specified name
- Throws:
IllegalArgumentException
- if this enum type has no constant with the specified nameNullPointerException
- if the argument is null
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getAlgorithm
public String getAlgorithm()
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getKeySize
public int getKeySize()
- Specified by:
getKeySize
in interfaceKeySizeIndicator
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isSupported
public boolean isSupported()
- Specified by:
isSupported
in interfaceOptionalFeature
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createKeyAgreement
public KeyAgreement createKeyAgreement() throws GeneralSecurityException
- Throws:
GeneralSecurityException
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createDigest
public Digest createDigest()
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generateKeyPair
public KeyPair generateKeyPair()
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encode
public byte[] encode(PublicKey key) throws InvalidKeyException
- Throws:
InvalidKeyException
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decode
public PublicKey decode(byte[] key) throws InvalidKeySpecException
- Throws:
InvalidKeySpecException
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