jdk-14.0.2ADDITIONAL SYSTEM INFORMATION :
Mac OS X 10.14.1
OpenJDK 11.0.1
Oracle JDK 1.8.0_192

A DESCRIPTION OF THE PROBLEM :
A private key that has been saved to a PKCS12 keystore using custom PBE parameters in Java 8 (1.8.0_192) cannot be read in Java 11.0.1 and vice versa. It appears the ASN.1 encoding of the PBE parameters has incompatibly changed at some point between these two releases. 

REGRESSION : Last worked in version 8u192

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a PKCS#12 keystore in Java 8 and add a private key entry using a custom PBE scheme:

        KeyStore.PrivateKeyEntry privateKeyEntry = new PrivateKeyEntry(keyPair.getPrivate(),
                new Certificate[] { cert });
        keyStore.setEntry("server", privateKeyEntry,
                new PasswordProtection("password".toCharArray(), "PBEWithHmacSHA512AndAES_256",
                        new PBEParameterSpec(salt, 100_000)));

Save the PKCS12 keystore to a file. Now try to load the same keystore and key from Java 11.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The key is loaded correctly without error.
ACTUAL -
Exception in thread "main" java.security.UnrecoverableKeyException: Private key not stored as PKCS#8 EncryptedPrivateKeyInfo: java.io.IOException: ObjectIdentifier() -- data isn't an object ID (tag = 42)
	at java.base/sun.security.pkcs12.PKCS12KeyStore.engineGetKey(PKCS12KeyStore.java:373)
	at java.base/sun.security.util.KeyStoreDelegator.engineGetKey(KeyStoreDelegator.java:90)
	at java.base/java.security.KeyStore.getKey(KeyStore.java:1057)
	at PemTest.main(PemTest.java:72)
Caused by: java.io.IOException: ObjectIdentifier() -- data isn't an object ID (tag = 42)
	at java.base/sun.security.util.ObjectIdentifier.<init>(ObjectIdentifier.java:257)
	at java.base/sun.security.util.DerInputStream.getOID(DerInputStream.java:320)
	at java.base/com.sun.crypto.provider.PBES2Parameters.parseKDF(PBES2Parameters.java:282)
	at java.base/com.sun.crypto.provider.PBES2Parameters.engineInit(PBES2Parameters.java:267)
	at java.base/java.security.AlgorithmParameters.init(AlgorithmParameters.java:312)
	at java.base/sun.security.x509.AlgorithmId.decodeParams(AlgorithmId.java:132)
	at java.base/sun.security.x509.AlgorithmId.<init>(AlgorithmId.java:114)
	at java.base/sun.security.x509.AlgorithmId.parse(AlgorithmId.java:374)
	at java.base/sun.security.pkcs.EncryptedPrivateKeyInfo.<init>(EncryptedPrivateKeyInfo.java:80)
	at java.base/sun.security.pkcs12.PKCS12KeyStore.engineGetKey(PKCS12KeyStore.java:362)
	... 3 more


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import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.math.BigInteger;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.KeyStore;
import java.security.KeyStore.PasswordProtection;
import java.security.KeyStore.PrivateKeyEntry;
import java.security.SecureRandom;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.Date;
import java.util.concurrent.TimeUnit;

import javax.crypto.spec.PBEParameterSpec;

import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cert.X509v3CertificateBuilder;
import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;

public class Pkcs12Test {

    public static void main(String[] args) throws Exception {
        
        // *** RUN THIS AS JAVA 8 ***
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC");
        keyPairGenerator.initialize(256);
        KeyPair keyPair = keyPairGenerator.generateKeyPair();

        SecureRandom secureRandom = SecureRandom.getInstanceStrong();
        BigInteger serial = new BigInteger(159, secureRandom);
        X500Name self = new X500Name("cn=localhost");

        X509v3CertificateBuilder certificateBuilder = new JcaX509v3CertificateBuilder(self, serial,
                new Date(), new Date(System.currentTimeMillis() + TimeUnit.DAYS.toMillis(3650)), self,
                keyPair.getPublic());
        
        X509CertificateHolder certHolder = certificateBuilder.build(new JcaContentSignerBuilder("SHA256WithECDSA")
                .setSecureRandom(secureRandom)
                .build(keyPair.getPrivate()));
        X509Certificate cert = new JcaX509CertificateConverter().getCertificate(certHolder);

        KeyStore keyStore = KeyStore.getInstance("PKCS12");
        keyStore.load(null, null);

        byte[] salt = new byte[20];
        new SecureRandom().nextBytes(salt);

        KeyStore.PrivateKeyEntry privateKeyEntry = new PrivateKeyEntry(keyPair.getPrivate(),
                new Certificate[] { cert });
        keyStore.setEntry("server", privateKeyEntry,
                new PasswordProtection("password".toCharArray(), "PBEWithHmacSHA512AndAES_256",
                        new PBEParameterSpec(salt, 100_000)));


        keyStore.store(new FileOutputStream("/tmp/keystore.p12"), "changeit".toCharArray());

        
        /*** RUN THIS AS JAVA 11 ***/
        keyStore.load(new FileInputStream("/tmp/keystore.p12"), "changeit".toCharArray());
        Key key = keyStore.getKey("server", "password".toCharArray());

        System.out.println("Reloaded key: " + key);
    }
}

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CUSTOMER SUBMITTED WORKAROUND :
Either do not use a custom PBE encryption scheme or recreate keystores from scratch when moving to Java 11.

FREQUENCY : always