Java Code Examples for org.spongycastle.asn1.x509.SubjectPublicKeyInfo#getInstance()

The following examples show how to use org.spongycastle.asn1.x509.SubjectPublicKeyInfo#getInstance() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: EditServerActivity.java From revolution-irc with GNU General Public License v3.0

6 votes

private void generateCert() throws Exception {
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    keyPairGenerator.initialize(2048);
    KeyPair kp = keyPairGenerator.generateKeyPair();

    X500Name name = new X500Name("CN=Revolution IRC Client Certificate");
    BigInteger serial = new BigInteger(64, new SecureRandom());
    Date from = new Date();
    Date to = new Date(from.getTime() + 30L * 365L * 24L * 60L * 60L * 1000L);
    X509v3CertificateBuilder builder = new X509v3CertificateBuilder(name, serial, from, to, name, SubjectPublicKeyInfo.getInstance(kp.getPublic().getEncoded()));
    ContentSigner signer = new JcaContentSignerBuilder("SHA256WithRSA").build(kp.getPrivate());
    X509CertificateHolder holder = builder.build(signer);


    CertificateFactory factory = CertificateFactory.getInstance("X.509");
    mServerCert = (X509Certificate) factory.generateCertificate(
            new ByteArrayInputStream(holder.getEncoded()));
    mServerPrivKey = kp.getPrivate().getEncoded();
    mServerPrivKeyType = kp.getPrivate().getAlgorithm();
    mServerAuthSASLExtFP.setText(getString(R.string.server_sasl_ext_fp,
            getCertificateFingerprint(mServerCert)));
}

Example 2

Source File: Crypto.java From particle-android with Apache License 2.0

6 votes

static PublicKey buildPublicKey(byte[] rawBytes) throws CryptoException {
    try {
        ASN1InputStream bIn = new ASN1InputStream(new ByteArrayInputStream(rawBytes));
        SubjectPublicKeyInfo info = SubjectPublicKeyInfo
                .getInstance(new ASN1InputStream(bIn.readObject().getEncoded()).readObject());
        DLSequence dlSequence = (DLSequence) ASN1Primitive.fromByteArray(info.getPublicKeyData().getBytes());
        BigInteger modulus = ((ASN1Integer) dlSequence.getObjectAt(0)).getPositiveValue();
        BigInteger exponent = ((ASN1Integer) dlSequence.getObjectAt(1)).getPositiveValue();

        RSAPublicKeySpec spec = new RSAPublicKeySpec(modulus, exponent);
        KeyFactory kf = getRSAKeyFactory();
        return kf.generatePublic(spec);
    } catch (InvalidKeySpecException | IOException e) {
        throw new CryptoException(e);
    }
}

Example 3

Source File: Crypto.java From spark-setup-android with Apache License 2.0

6 votes

static PublicKey buildPublicKey(byte[] rawBytes) throws CryptoException {
    try {
        //FIXME replacing X509EncodedKeySpec because of problem with 8.1
        //Since 8.1 Bouncycastle cryptography was replaced with implementation from Conscrypt
        //https://developer.android.com/about/versions/oreo/android-8.1.html
        //either it's a bug in Conscrypt, our public key DER structure or use of X509EncodedKeySpec changed
        //alternative needed as this adds expensive Spongycastle dependence
        ASN1InputStream bIn = new ASN1InputStream(new ByteArrayInputStream(rawBytes));
        SubjectPublicKeyInfo info = SubjectPublicKeyInfo
                .getInstance(new ASN1InputStream(bIn.readObject().getEncoded()).readObject());
        DLSequence dlSequence = (DLSequence) ASN1Primitive.fromByteArray(info.getPublicKeyData().getBytes());
        BigInteger modulus = ((ASN1Integer) dlSequence.getObjectAt(0)).getPositiveValue();
        BigInteger exponent = ((ASN1Integer) dlSequence.getObjectAt(1)).getPositiveValue();

        RSAPublicKeySpec spec = new RSAPublicKeySpec(modulus, exponent);
        KeyFactory kf = getRSAKeyFactory();
        return kf.generatePublic(spec);
    } catch (InvalidKeySpecException | IOException e) {
        throw new CryptoException(e);
    }
}

Example 4

Source File: JumbleCertificateGenerator.java From Jumble with GNU General Public License v3.0

5 votes

public static X509Certificate generateCertificate(OutputStream output) throws NoSuchAlgorithmException, OperatorCreationException, CertificateException, KeyStoreException, NoSuchProviderException, IOException {
	BouncyCastleProvider provider = new BouncyCastleProvider(); // Use SpongyCastle provider, supports creating X509 certs
	KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
	generator.initialize(2048, new SecureRandom());
	
	KeyPair keyPair = generator.generateKeyPair();
	
	SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfo.getInstance(keyPair.getPublic().getEncoded());
	ContentSigner signer = new JcaContentSignerBuilder("SHA1withRSA").setProvider(provider).build(keyPair.getPrivate());
	
	Date startDate = new Date();
	Calendar calendar = Calendar.getInstance();
	calendar.setTime(startDate);
	calendar.add(Calendar.YEAR, YEARS_VALID);
    Date endDate = calendar.getTime();
	
	X509v3CertificateBuilder certBuilder = new X509v3CertificateBuilder(new X500Name(ISSUER),
			BigInteger.ONE, 
			startDate, endDate, new X500Name(ISSUER),
			publicKeyInfo);

	X509CertificateHolder certificateHolder = certBuilder.build(signer);
	
	X509Certificate certificate = new JcaX509CertificateConverter().setProvider(provider).getCertificate(certificateHolder);
	
	KeyStore keyStore = KeyStore.getInstance("PKCS12", provider);
	keyStore.load(null, null);
	keyStore.setKeyEntry("Jumble Key", keyPair.getPrivate(), null, new X509Certificate[] { certificate });
	
	keyStore.store(output, "".toCharArray());
	
	return certificate;
}