这是例外情况：
java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException : DER input, Integer tag error
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(Unknown Source)
at java.security.KeyFactory.generatePrivate(Unknown Source)
Caused by: java.security.InvalidKeyException: IOException : DER input, Integer tag error at sun.security.pkcs.PKCS8Key.decode(Unknown Source)
这是代码：
import java.io.*;
import java.security.*;
import java.security.KeyStore.PasswordProtection;
import java.security.cert.CertificateException;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.IvParameterSpec;
import org.bouncycastle.asn1.*;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.EncryptedPrivateKeyInfo;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.util.encoders.Base64;
public class KeyPairUtil {
final static String keyStoreFile = "D:\\aeskey.jks";
private static final ASN1ObjectIdentifier AES = ASN1ObjectIdentifier.getInstance(NISTObjectIdentifiers.id_aes128_CBC);
public static void main(String[] args) throws Exception {
final …