org.spongycastle.jce

Class ECKeyUtil

java.lang.Object

org.spongycastle.jce.ECKeyUtil

public class ECKeyUtil
extends java.lang.Object

Utility class to allow conversion of EC key parameters to explicit from named curves and back (where possible).

Constructor Summary

Constructors

Constructor and Description
ECKeyUtil()

Method Summary

Modifier and Type	Method and Description
static java.security.PrivateKey	privateToExplicitParameters(java.security.PrivateKey key, java.security.Provider provider) Convert a passed in private EC key to have explicit parameters.
static java.security.PrivateKey	privateToExplicitParameters(java.security.PrivateKey key, java.lang.String providerName) Convert a passed in private EC key to have explicit parameters.
static java.security.PublicKey	publicToExplicitParameters(java.security.PublicKey key, java.security.Provider provider) Convert a passed in public EC key to have explicit parameters.
static java.security.PublicKey	publicToExplicitParameters(java.security.PublicKey key, java.lang.String providerName) Convert a passed in public EC key to have explicit parameters.

Methods inherited from class java.lang.Object

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

Constructor Detail

ECKeyUtil

public ECKeyUtil()

Method Detail

publicToExplicitParameters

public static java.security.PublicKey publicToExplicitParameters(java.security.PublicKey key,
                                                                 java.lang.String providerName)
                                                          throws java.lang.IllegalArgumentException,
                                                                 java.security.NoSuchAlgorithmException,
                                                                 java.security.NoSuchProviderException

Convert a passed in public EC key to have explicit parameters. If the key is already using explicit parameters it is returned.

Parameters:

key - key to be converted

providerName - provider name to be used.

Returns:

the equivalent key with explicit curve parameters

Throws:

java.lang.IllegalArgumentException

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

publicToExplicitParameters

public static java.security.PublicKey publicToExplicitParameters(java.security.PublicKey key,
                                                                 java.security.Provider provider)
                                                          throws java.lang.IllegalArgumentException,
                                                                 java.security.NoSuchAlgorithmException

Convert a passed in public EC key to have explicit parameters. If the key is already using explicit parameters it is returned.

Parameters:

key - key to be converted

provider - provider to be used.

Returns:

the equivalent key with explicit curve parameters

Throws:

java.lang.IllegalArgumentException

java.security.NoSuchAlgorithmException

privateToExplicitParameters

public static java.security.PrivateKey privateToExplicitParameters(java.security.PrivateKey key,
                                                                   java.lang.String providerName)
                                                            throws java.lang.IllegalArgumentException,
                                                                   java.security.NoSuchAlgorithmException,
                                                                   java.security.NoSuchProviderException

Convert a passed in private EC key to have explicit parameters. If the key is already using explicit parameters it is returned.

Parameters:

key - key to be converted

providerName - provider name to be used.

Returns:

the equivalent key with explicit curve parameters

Throws:

java.lang.IllegalArgumentException

java.security.NoSuchAlgorithmException

java.security.NoSuchProviderException

privateToExplicitParameters

public static java.security.PrivateKey privateToExplicitParameters(java.security.PrivateKey key,
                                                                   java.security.Provider provider)
                                                            throws java.lang.IllegalArgumentException,
                                                                   java.security.NoSuchAlgorithmException

Convert a passed in private EC key to have explicit parameters. If the key is already using explicit parameters it is returned.

Parameters:

key - key to be converted

provider - provider to be used.

Returns:

the equivalent key with explicit curve parameters

Throws:

java.lang.IllegalArgumentException

java.security.NoSuchAlgorithmException