Package org.bouncycastle.jcajce.provider.asymmetric.sm9

Class KeyFactorySpi

java.lang.Object

java.security.KeyFactorySpi

org.bouncycastle.jcajce.provider.asymmetric.sm9.KeyFactorySpi

public class KeyFactorySpi
extends java.security.KeyFactorySpi

KeyFactory for the SM9 master keys (sm9sign and sm9encrypt): the master public and private keys round-trip through their JCA X.509 / PKCS#8 encodings (the GM/T 0080-2020 key material under the GM algorithm OID; the bare GM/T 0080-2020 form is the lightweight key-parameter class's getEncoded()).

A user's identity-based key is not decodable in isolation - it additionally needs the master public key and the identity, and for an encryption key the hid and the usage (KEM / decryption or key exchange) too - so it does not decode from a plain PKCS#8 spec. Rebuild a stored user key from its encoding plus that context with an SM9SigUserPrivateKeySpec / SM9EncUserPrivateKeySpec (also handed back by getKeySpec), or derive it afresh from the master private key via the master key's generateUserKeyPair method.

Constructor Summary

Constructors

Constructor	Description
KeyFactorySpi()

Method Summary

Modifier and Type	Method	Description
protected java.security.PrivateKey	engineGeneratePrivate(java.security.spec.KeySpec keySpec)
protected java.security.PublicKey	engineGeneratePublic(java.security.spec.KeySpec keySpec)
protected java.security.spec.KeySpec	engineGetKeySpec(java.security.Key key, java.lang.Class keySpec)
protected java.security.Key	engineTranslateKey(java.security.Key key)

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyFactorySpi

public KeyFactorySpi()

Method Detail

engineGeneratePublic

protected java.security.PublicKey engineGeneratePublic(java.security.spec.KeySpec keySpec)
                                                throws java.security.spec.InvalidKeySpecException

Specified by:

engineGeneratePublic in class java.security.KeyFactorySpi

Throws:

java.security.spec.InvalidKeySpecException

engineGeneratePrivate

protected java.security.PrivateKey engineGeneratePrivate(java.security.spec.KeySpec keySpec)
                                                  throws java.security.spec.InvalidKeySpecException

Specified by:

engineGeneratePrivate in class java.security.KeyFactorySpi

Throws:

java.security.spec.InvalidKeySpecException

engineGetKeySpec

protected java.security.spec.KeySpec engineGetKeySpec(java.security.Key key,
                                                      java.lang.Class keySpec)
                                               throws java.security.spec.InvalidKeySpecException

Specified by:

engineGetKeySpec in class java.security.KeyFactorySpi

Throws:

java.security.spec.InvalidKeySpecException

engineTranslateKey

protected java.security.Key engineTranslateKey(java.security.Key key)
                                        throws java.security.InvalidKeyException

Specified by:

engineTranslateKey in class java.security.KeyFactorySpi

Throws:

java.security.InvalidKeyException