Interface KDFAnsiX963Spec

All Superinterfaces:

AlgorithmParameterSpec

public interface KDFAnsiX963Spec
extends AlgorithmParameterSpec

This interface specifies the set of parameters used to instantiate a DerivationFunction implementing the KDF Key Derivation Function defined in in the standard ANSI X9.63.

This interface is bound to the constant DerivationFunction.ALG_KDF_ANSI_X9_63.

Since:

3.1

See Also:

• DerivationFunction

Method Summary

Modifier and Type	Method	Description
byte	getAlgorithm()	Returns the Digest Algorithm associated with the derivation function.
short	getOutputLength()	Returns the KDF output length in bytes.
byte[]	getSecret()	Gets the shared secret value for the key derivation function.
byte[]	getSharedInfo()	Gets the shared info data.

Method Details

getAlgorithm

byte getAlgorithm()

Returns the Digest Algorithm associated with the derivation function.

Returns:

the Digest algorithm associated with the derivation function

See Also:

• e.g
• MessageDigest.ALG_SHA_224
• MessageDigest.ALG_SHA_256
• MessageDigest.ALG_SHA_384
• MessageDigest.ALG_SHA_512
• MessageDigest.ALG_SHA3_224
• MessageDigest.ALG_SHA3_256
• MessageDigest.ALG_SHA3_384
• MessageDigest.ALG_SHA3_512

getSecret

byte[] getSecret()

Gets the shared secret value for the key derivation function.

Returns:

the shared secret. It may be an array view.

getSharedInfo

byte[] getSharedInfo()

Gets the shared info data.

It may be an array view. It may be null.

Returns:

the fixed input data.

getOutputLength

short getOutputLength()

Returns the KDF output length in bytes. It specifies the total length of data that can be generated using subsequent calls to DerivationFunction.nextBytes(byte[], short, short) or DerivationFunction.nextBytes(javacard.security.SecretKey).

Returns:

the output length