Java examples for Security:Key
from PKCS8 to RSAPrivateKey
//package com.java2s; import java.security.InvalidKeyException; import java.security.KeyFactory; import java.security.NoSuchAlgorithmException; import java.security.PrivateKey; import java.security.interfaces.RSAPrivateKey; import java.security.spec.InvalidKeySpecException; import java.security.spec.PKCS8EncodedKeySpec; public class Main { public static RSAPrivateKey fromPKCS8(byte[] pkcs8) throws InvalidKeyException, InvalidKeySpecException, NoSuchAlgorithmException { KeyFactory keyFactory = KeyFactory.getInstance("RSA"); PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(pkcs8); PrivateKey key = keyFactory.generatePrivate(keySpec); if (key instanceof RSAPrivateKey) { return (RSAPrivateKey) key; } else {/*from w w w .j a va2 s.c om*/ throw new InvalidKeyException("Cannot cast " + key + " to a RSA private key"); } } }