org.bouncycastle.openssl.PEMWriter Java Examples

private byte[] getPrivateKeyContent() throws Exception {

        try {
            KeyStore keyStore = SslUtils.loadKeystore(keyStoreFile, keyStorePassword);
            PrivateKey privateKey = (PrivateKey) keyStore.getKey(keyAlias, null);

            if (privateKey == null) {
                throw new Exception("The alias '" + keyAlias + "' does not point to an existing key-related entry");
            }

            StringWriter stringWriter = new StringWriter();
            PEMWriter pemWriter = new PEMWriter(stringWriter);
            pemWriter.writeObject(privateKey);
            pemWriter.close();

            byte[] privateKeyPEM = stringWriter.toString().getBytes();

            return privateKeyPEM;
        } catch (Exception e) {
            throw new Exception("Could not get private key content", e);
        }

    }
 

private static String encode(Object obj) {
    if (obj == null) {
        return null;
    }

    try {
        StringWriter writer = new StringWriter();
        PEMWriter pemWriter = new PEMWriter(writer);
        pemWriter.writeObject(obj);
        pemWriter.flush();
        pemWriter.close();
        String s = writer.toString();
        return PemUtils.removeBeginEnd(s);
    } catch (Exception e) {
        throw new PemException(e);
    }
}
 

public static String getStringFromKeyPair(PrivateKey privateKey, PublicKey publicKey) throws Exception {
	try (StringWriter stringWriter = new StringWriter()) {
		try (PEMWriter pemWriter = new PEMWriter(stringWriter)) {
			pemWriter.writeObject(privateKey);
			pemWriter.writeObject(publicKey);
		}
		return stringWriter.toString();
	} catch (Exception e) {
		throw new Exception("Cannot create key string: " + e.getMessage(), e);
	}
}
 

public String getPEM(PrivateKey privKey) {

        StringWriter stringWriter = new StringWriter();
        PEMWriter pemWriter = new PEMWriter(stringWriter);
        try {
            pemWriter.writeObject(privKey);
            pemWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        String privKeyString = stringWriter.toString();

        return privKeyString;

    }
 

@SuppressWarnings("deprecation")
public static byte[] toPem(Object object) throws IOException {
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    try (PEMWriter writer = new PEMWriter(new OutputStreamWriter(outputStream))) {
        writer.writeObject(object);
        writer.flush();
        return outputStream.toByteArray();
    }
}
 

@SuppressWarnings("deprecation")
public static byte[] toPem(Object... objects) throws IOException {
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    try (PEMWriter writer = new PEMWriter(new OutputStreamWriter(outputStream))) {
        for (Object object : objects) {
            writer.writeObject(object);
        }
        writer.flush();
        return outputStream.toByteArray();
    }
}
 

public static String generatePEMEncoded(Certificate cert) {
	StringWriter encoded = new StringWriter();
	PEMWriter pEMWriter = new PEMWriter(encoded);
	try {
		pEMWriter.writeObject(cert);
		pEMWriter.close();
		return encoded.toString();
	} catch (IOException e) {
		e.printStackTrace();
	}
	return null;
}
 

private void writeCertificate(Certificate... certificates)
        throws IOException {
    final PEMWriter writer = new PEMWriter(new FileWriter(destfile));
    for (final Certificate c : certificates) {
        writer.writeObject(c);
    }
    writer.close();
}
 

/** returns the PEM (base64, ie for id_rsa) string for the private key / key pair;
 * this starts -----BEGIN PRIVATE KEY----- and ends similarly, like id_rsa.
 * also see {@link #readPem(byte[], String)} */
public static String toPem(KeyPair key) {
    try {
        StringWriter sw = new StringWriter();
        PEMWriter w = new PEMWriter(sw);
        w.writeObject(key);
        w.close();
        return sw.toString();
    } catch (IOException e) {
        throw Throwables.propagate(e);
    }
}
 

public String convertToPEMString(X509Certificate x509Cert) throws IOException {

    StringWriter sw = new StringWriter();
    try (PEMWriter pw = new PEMWriter(sw)) {
      pw.writeObject(x509Cert);
    }

    return sw.toString();
  }
 

@Test
public void testPemWriter() {
    PublicKey realmPublicKey = idpPair.getPublic();
    StringWriter sw = new StringWriter();
    PEMWriter writer = new PEMWriter(sw);
    try {
        writer.writeObject(realmPublicKey);
        writer.flush();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    System.out.println(sw.toString());
}
 

public static String getPEMStringFromPrivateKey(PrivateKey privateKey) throws IOException {
    StringWriter pemStrWriter = new StringWriter();
    PEMWriter pemWriter = new PEMWriter(pemStrWriter);

    pemWriter.writeObject(privateKey);

    pemWriter.close();

    return pemStrWriter.toString();
}