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Selbst signiertes X509-Zertifikat mit Bouncy Castle in Java

Ich muss ein selbstsigniertes X509-Zertifikat mit Bouncy Castle in Java erstellen, aber jede Klasse, die ich einbinden möchte, ist veraltet. Wie kann ich das lösen? Gibt es eine andere Klasse, die aufgenommen werden kann? Vielen Dank

14
paola91

Bouncycastle neueste Version verwenden - 1.55

Aktualisieren Sie die Antwort mit @Bewusstsein. Die Bouncycastle-Klassen werden in der neuesten Version ab dieser Antwort (5/11/2017) nicht mehr unterstützt. Wenn Sie die neueste Version (1.55) oder eine relativ aktuelle Version verwenden:

public static Certificate selfSign(KeyPair keyPair, String subjectDN) throws OperatorCreationException, CertificateException, IOException
{
    Provider bcProvider = new BouncyCastleProvider();
    Security.addProvider(bcProvider);

    long now = System.currentTimeMillis();
    Date startDate = new Date(now);

    X500Name dnName = new X500Name(subjectDN);
    BigInteger certSerialNumber = new BigInteger(Long.toString(now)); // <-- Using the current timestamp as the certificate serial number

    Calendar calendar = Calendar.getInstance();
    calendar.setTime(startDate);
    calendar.add(Calendar.YEAR, 1); // <-- 1 Yr validity

    Date endDate = calendar.getTime();

    String signatureAlgorithm = "SHA256WithRSA"; // <-- Use appropriate signature algorithm based on your keyPair algorithm.

    ContentSigner contentSigner = new JcaContentSignerBuilder(signatureAlgorithm).build(keyPair.getPrivate());

    JcaX509v3CertificateBuilder certBuilder = new JcaX509v3CertificateBuilder(dnName, certSerialNumber, startDate, endDate, dnName, keyPair.getPublic());

    // Extensions --------------------------

    // Basic Constraints
    BasicConstraints basicConstraints = new BasicConstraints(true); // <-- true for CA, false for EndEntity

    certBuilder.addExtension(new ASN1ObjectIdentifier("2.5.29.19"), true, basicConstraints); // Basic Constraints is usually marked as critical.

    // -------------------------------------

    return new JcaX509CertificateConverter().setProvider(bcProvider).getCertificate(certBuilder.build(contentSigner));
}

BEWARE: Diese Antwort verwendet eine alte Version der Bibliothek mit 11 CVEs .

Hier ist was ich benutze (mit BouncyCastle v1.38):

import Java.math.BigInteger;
import Java.security.InvalidKeyException;
import Java.security.KeyPair;
import Java.security.KeyPairGenerator;
import Java.security.NoSuchAlgorithmException;
import Java.security.NoSuchProviderException;
import Java.security.SecureRandom;
import Java.security.Security;
import Java.security.SignatureException;
import Java.util.Date;

import javax.security.auth.x500.X500Principal;

import Java.security.cert.CertificateEncodingException;
import Java.security.cert.X509Certificate;

import org.bouncycastle.asn1.x509.ExtendedKeyUsage;
import org.bouncycastle.asn1.x509.KeyPurposeId;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.asn1.x509.X509Name;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.x509.X509V3CertificateGenerator;

public class BouncyCastle {

    public static void main(String[] args) throws CertificateEncodingException, InvalidKeyException, IllegalStateException, NoSuchProviderException, NoSuchAlgorithmException, SignatureException {
        X509Certificate selfSignedX509Certificate = new BouncyCastle().generateSelfSignedX509Certificate();
        System.out.println(selfSignedX509Certificate);
    }

    public X509Certificate generateSelfSignedX509Certificate() throws CertificateEncodingException, InvalidKeyException, IllegalStateException,
            NoSuchProviderException, NoSuchAlgorithmException, SignatureException {
        addBouncyCastleAsSecurityProvider();

        // generate a key pair
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA", "BC");
        keyPairGenerator.initialize(4096, new SecureRandom());
        KeyPair keyPair = keyPairGenerator.generateKeyPair();

        // build a certificate generator
        X509V3CertificateGenerator certGen = new X509V3CertificateGenerator();
        X500Principal dnName = new X500Principal("cn=example");

        // add some options
        certGen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis()));
        certGen.setSubjectDN(new X509Name("dc=name"));
        certGen.setIssuerDN(dnName); // use the same
        // yesterday
        certGen.setNotBefore(new Date(System.currentTimeMillis() - 24 * 60 * 60 * 1000));
        // in 2 years
        certGen.setNotAfter(new Date(System.currentTimeMillis() + 2 * 365 * 24 * 60 * 60 * 1000));
        certGen.setPublicKey(keyPair.getPublic());
        certGen.setSignatureAlgorithm("SHA256WithRSAEncryption");
        certGen.addExtension(X509Extensions.ExtendedKeyUsage, true,
                new ExtendedKeyUsage(KeyPurposeId.id_kp_timeStamping));

        // finally, sign the certificate with the private key of the same KeyPair
        X509Certificate cert = certGen.generate(keyPair.getPrivate(), "BC");
        return cert;
    }

    public void addBouncyCastleAsSecurityProvider() {
        Security.addProvider(new BouncyCastleProvider());
    }
}

Damit certGen.generate(keyPair.getPrivate(), "BC"); funktioniert, muss BouncyCastle als Sicherheitsanbieter hinzugefügt werden.

Ich habe bestätigt, dass es mit dieser Maven-Abhängigkeit funktioniert:

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk16</artifactId>
    <version>1.38</version>
</dependency>
9
Bewusstsein

Hier ist ein vollständiger selbstsignierter ECDSA-Zertifikatsgenerator, der Zertifikate erstellt, die in TLS-Verbindungen auf Client- und Serverseite verwendet werden können. Es wurde mit BouncyCastle 1.57 getestet. Ein ähnlicher Code kann zum Erstellen von RSA-Zertifikaten verwendet werden.

SecureRandom random = new SecureRandom();

// create keypair
KeyPairGenerator keypairGen = KeyPairGenerator.getInstance("EC");
keypairGen.initialize(256, random);
KeyPair keypair = keypairGen.generateKeyPair();

// fill in certificate fields
X500Name subject = new X500NameBuilder(BCStyle.INSTANCE)
    .addRDN(BCStyle.CN, "stackoverflow.com")
    .build();
byte[] id = new byte[20];
random.nextBytes(id);
BigInteger serial = new BigInteger(160, random);
X509v3CertificateBuilder certificate = new JcaX509v3CertificateBuilder(
    subject,
    serial,
    Date.from(LocalDate.of(2000, 1, 1).atStartOfDay(ZoneOffset.UTC).toInstant()),
    Date.from(LocalDate.of(2035, 1, 1).atStartOfDay(ZoneOffset.UTC).toInstant()),
    subject,
    keypair.getPublic());
certificate.addExtension(Extension.subjectKeyIdentifier, false, id);
certificate.addExtension(Extension.authorityKeyIdentifier, false, id);
BasicConstraints constraints = new BasicConstraints(true);
certificate.addExtension(
    Extension.basicConstraints,
    true,
    constraints.getEncoded());
KeyUsage usage = new KeyUsage(KeyUsage.keyCertSign | KeyUsage.digitalSignature);
certificate.addExtension(Extension.keyUsage, false, usage.getEncoded());
ExtendedKeyUsage usageEx = new ExtendedKeyUsage(new KeyPurposeId[] {
    KeyPurposeId.id_kp_serverAuth,
    KeyPurposeId.id_kp_clientAuth
});
certificate.addExtension(
    Extension.extendedKeyUsage,
    false,
    usageEx.getEncoded());

// build BouncyCastle certificate
ContentSigner signer = new JcaContentSignerBuilder("SHA256withECDSA")
    .build(keypair.getPrivate());
X509CertificateHolder holder = certificate.build(signer);

// convert to JRE certificate
JcaX509CertificateConverter converter = new JcaX509CertificateConverter();
converter.setProvider(new BouncyCastleProvider());
X509Certificate x509 = converter.getCertificate(holder);

// serialize in DER format
byte[] serialized = x509.getEncoded();
4
Robert Važan

Dies ist der Code, der von BouncyCastle it zur Generierung von X.509-Zertifikaten verwendet wird. Sie benötigen this und this - Bibliothek von BC, um sie zu verwenden. Für weitere Details Wie man es benutzt, kann man vielleicht this question (Hauptklasse) anschauen.

    public class BCCertGen {
    public static String _country = "Westeros",
                         _organisation = "Targaryen",
                         _location = "Valyria",
                         _state = "Essos",
                         _issuer = "Some Trusted CA";

    public BCCertGen(String country, String organisation, String location, String state, String issuer){
        _country = country;
        _organisation = organisation;
        _location = location;
        _state = state;
        _issuer = issuer;
    }
    public static X509Certificate generate(PrivateKey privKey, PublicKey pubKey, int duration, String signAlg, boolean isSelfSigned) throws Exception{
        Provider BC = new BouncyCastleProvider();

        // distinguished name table.
        X500NameBuilder builder = createStdBuilder();

        // create the certificate
        ContentSigner sigGen = new JcaContentSignerBuilder(signAlg).build(privKey);
        X509v3CertificateBuilder certGen = new JcaX509v3CertificateBuilder(
                new X500Name("cn="+_issuer),    //Issuer
                BigInteger.valueOf(1),      //Serial
                new Date(System.currentTimeMillis() - 50000),   //Valid from
                new Date((long)(System.currentTimeMillis() + duration*8.65*Math.pow(10,7))),    //Valid to
                builder.build(),    //Subject
                pubKey              //Publickey to be associated with the certificate
        );

        X509Certificate cert = new JcaX509CertificateConverter().setProvider(BC).getCertificate(certGen.build(sigGen));

        cert.checkValidity(new Date());

        if (isSelfSigned) {
            // check verifies in general
            cert.verify(pubKey);
            // check verifies with contained key
            cert.verify(cert.getPublicKey());
        }

        ByteArrayInputStream bIn = new ByteArrayInputStream(cert.getEncoded());
        CertificateFactory fact = CertificateFactory.getInstance("X.509", BC);

        return (X509Certificate) fact.generateCertificate(bIn);
    }

    private static X500NameBuilder createStdBuilder() {
        X500NameBuilder builder = new X500NameBuilder(RFC4519Style.INSTANCE);

        builder.addRDN(RFC4519Style.c, _country);
        builder.addRDN(RFC4519Style.o, _organisation);
        builder.addRDN(RFC4519Style.l, _location);
        builder.addRDN(RFC4519Style.st, _state);

        return builder;
    }
}

EDIT: Ich kann mich nicht erinnern, von welchem ​​BC-Test ich genau genommen habe, aber hier ist etwas Ähnliches https://github.com/bcgit/bc-Java/blob/master/prov/src/test/Java/org /bouncycastle/pqc/jcajce/provider/test/KeyStoreTest.Java

1
Nicolas Brauer