Java Certificate.getPublicKey方法代碼示例

import java.security.cert.Certificate; //導入方法依賴的package包/類
private static boolean test(Certificate target, Certificate signer,
        String title, boolean expected) throws Exception {
    System.out.print("Checking " + title + ": expected: " +
            (expected ? "    verified" : "NOT verified"));
    boolean actual;
    try {
        PublicKey pubKey = signer.getPublicKey();
        target.verify(pubKey);
        actual = true;
    } catch (SignatureException se) {
        actual = false;
    }
    System.out.println(", actual: " +
            (actual ? "    verified" : "NOT verified"));
    return actual == expected;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
private KeyPair getKerplappKeypair() throws KeyStoreException, UnrecoverableKeyException,
        NoSuchAlgorithmException {
    /*
     * You can't store a keypair without an associated certificate chain so,
     * we'll use the INDEX_CERT_ALIAS as the de-facto keypair/certificate
     * chain. This cert/key is initialized when the KerplappKeyStore is
     * constructed for the first time and should *always* be present.
     */
    Key key = keyStore.getKey(INDEX_CERT_ALIAS, "".toCharArray());

    if (key instanceof PrivateKey) {
        Certificate cert = keyStore.getCertificate(INDEX_CERT_ALIAS);
        PublicKey publicKey = cert.getPublicKey();
        return new KeyPair(publicKey, (PrivateKey) key);
    }

    return null;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
public PublicKey getPublicKey(String keyName) throws CryptoException
{
	PublicKey publicKey = null;

	try {
		KeyStore mKeyStore = KeyStore.getInstance(REST_AUTH_KEYSTORE_NAME);
		mKeyStore.load(null);

		Certificate certificate = mKeyStore.getCertificate(keyName);
		if (certificate != null)
			publicKey = certificate.getPublicKey();
	} catch (KeyStoreException | CertificateException | NoSuchAlgorithmException | IOException e) {
		throw new CryptoException(e.getMessage());
	}

	return publicKey;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
public String getEncodedPublicKey(String keyName) throws CryptoException
{
	PublicKey publicKey = null;

	try {
		KeyStore mKeyStore = KeyStore.getInstance(REST_AUTH_KEYSTORE_NAME);
		mKeyStore.load(null);

		Certificate certificate = mKeyStore.getCertificate(keyName);
		if (certificate != null)
			publicKey = certificate.getPublicKey();
	} catch (KeyStoreException | CertificateException | NoSuchAlgorithmException | IOException e) {
		throw new CryptoException(e.getMessage());
	}

	if (publicKey != null) {
		return Base64.encodeToString(publicKey.getEncoded(), Base64.NO_WRAP);
	}

	return null;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
/**
 * Load a public key
 * 
 * @param keystore
 * @param publicKeyAlias
 * @return
 */
public static PublicKey loadPublicKey( KeyStore keystore, String publicKeyAlias ) {

    Certificate certificate;
    try {
        certificate = keystore.getCertificate(publicKeyAlias);
    } catch (KeyStoreException e) {
        throw new RuntimeException("Error loading public key for alias '" + publicKeyAlias + "'", e);
    }

    if (certificate == null) {
        throw new RuntimeException("Error loading public key for alias '" + publicKeyAlias
                                   + "': Given alias does not exist or does not contain a certificate.");
    }

    if (log.isDebugEnabled()) {
        log.debug("Loaded public key for alias '" + publicKeyAlias + "'");
    }
    return certificate.getPublicKey();
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
private KeyPair getKeyPair() throws
        KeyStoreException, IOException,
        NoSuchAlgorithmException, CertificateException, UnrecoverableKeyException {
    FileInputStream is = new FileInputStream("mykeys.jks");

    KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
    keystore.load(is, "mypass".toCharArray());

    String alias = "mykeys";

    Key key = keystore.getKey(alias, "mypass".toCharArray());
    if (key instanceof PrivateKey) {
        // Get certificate of public key
        Certificate cert = keystore.getCertificate(alias);

        // Get public key
        PublicKey publicKey = cert.getPublicKey();

        // Return a key pair
        return new KeyPair(publicKey, (PrivateKey) key);
    } else throw new UnrecoverableKeyException();
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
/**
 * 根據公鑰Cer文本串讀取公鑰
 * 
 * @param pubKeyText
 * @return
 */
public static PublicKey getPublicKeyByText(String pubKeyText) {
	try {
		CertificateFactory certificateFactory = CertificateFactory.getInstance(BaofooRsaConst.KEY_X509);
		BufferedReader br = new BufferedReader(new StringReader(pubKeyText));
		String line = null;
		StringBuilder keyBuffer = new StringBuilder();
		while ((line = br.readLine()) != null) {
			if (!line.startsWith("-")) {
				keyBuffer.append(line);
			}
		}
		Certificate certificate = certificateFactory.generateCertificate(new ByteArrayInputStream(new BASE64Decoder().decodeBuffer(keyBuffer.toString())));
		return certificate.getPublicKey();
	} catch (Exception e) {
		// log.error("解析公鑰內容失敗:", e);
	}
	return null;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
/**
 * 獲取簽名證書公鑰對象
 * 
 * @return
 */
public PublicKey getSignPublicKey() {
	try {
		Enumeration<String> aliasenum = keyStore.aliases();
		String keyAlias = null;
		if (aliasenum.hasMoreElements()) // we are readin just one
		// certificate.
		{
			keyAlias = (String) aliasenum.nextElement();
		}
		Certificate cert = keyStore.getCertificate(keyAlias);
		PublicKey pubkey = cert.getPublicKey();
		return pubkey;
	} catch (Exception e) {
		LogUtil.writeErrorLog(e.toString());
		return null;
	}
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
public static Pair<Certificate,KeyPair> getCert(String keystore, String alias, String password) {
    logger.info("Loading cert from {} with alias {}",keystore,alias);
    KeyStore ks  = null;
    try {
        ks = KeyStore.getInstance("JKS");
        File fl = new File(keystore);
        FileInputStream stream = new FileInputStream(fl);
        ks.load(stream, password.toCharArray());
        final Key key = ks.getKey(alias, password.toCharArray());
        Certificate cert = ks.getCertificate(alias);
        KeyPair kp = new KeyPair(cert.getPublicKey(), (PrivateKey) key);
        return new Pair<>(ks.getCertificate(alias), kp);
    } catch (Exception e) {
        logger.error("Error loading certificate: ",e);
        throw new RuntimeCryptoException("Problem loading certificate");
    }
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
/**
 * Searches the specified keystore for a certificate that matches the
 * criteria specified in the CertSelector.
 *
 * @return a KeySelectorResult containing the cert's public key if there
 *   is a match; otherwise null
 */
private KeySelectorResult keyStoreSelect(CertSelector cs)
    throws KeyStoreException {
    Enumeration<String> aliases = ks.aliases();
    while (aliases.hasMoreElements()) {
        String alias = aliases.nextElement();
        Certificate cert = ks.getCertificate(alias);
        if (cert != null && cs.match(cert)) {
            return new SimpleKeySelectorResult(cert.getPublicKey());
        }
    }
    return null;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
@Override
protected Object execute0() throws Exception {
    KeyStore ks = KeyStore.getInstance("PKCS11", XiSecurityConstants.PROVIDER_NAME_XIPKI);
    ks.load(null, null);
    if (verbose.booleanValue()) {
        println("available aliases:");
        Enumeration<?> aliases = ks.aliases();
        while (aliases.hasMoreElements()) {
            String alias2 = (String) aliases.nextElement();
            println("    " + alias2);
        }
    }

    String alias = getAlias();
    println("alias: " + alias);
    PrivateKey key = (PrivateKey) ks.getKey(alias, null);
    if (key == null) {
        println("could not find key with alias '" + alias + "'");
        return null;
    }

    Certificate cert = ks.getCertificate(alias);
    if (cert == null) {
        println("could not find certificate to verify signature");
        return null;
    }
    PublicKey pubKey = cert.getPublicKey();

    String sigAlgo = "SM3withSM2";
    println("signature algorithm: " + sigAlgo);
    Signature sig = Signature.getInstance(sigAlgo, XiSecurityConstants.PROVIDER_NAME_XIPKI);

    if (StringUtil.isNotBlank(ida)) {
        sig.setParameter(new XiSM2ParameterSpec(ida.getBytes()));
    }

    sig.initSign(key);

    byte[] data = new byte[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    sig.update(data);
    byte[] signature = sig.sign(); // CHECKSTYLE:SKIP
    println("signature created successfully");

    Signature ver = Signature.getInstance(sigAlgo, "BC");
    if (StringUtil.isNotBlank(ida)) {
        ver.setParameter(new SM2ParameterSpec(ida.getBytes()));
    }

    ver.initVerify(pubKey);
    ver.update(data);
    boolean valid = ver.verify(signature);
    println("signature valid: " + valid);
    return null;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
@Override
protected Object execute0() throws Exception {
    KeyStore ks = KeyStore.getInstance("PKCS11", XiSecurityConstants.PROVIDER_NAME_XIPKI);
    ks.load(null, null);
    if (verbose.booleanValue()) {
        println("available aliases:");
        Enumeration<?> aliases = ks.aliases();
        while (aliases.hasMoreElements()) {
            String alias2 = (String) aliases.nextElement();
            println("    " + alias2);
        }
    }

    String alias = getAlias();
    println("alias: " + alias);
    PrivateKey key = (PrivateKey) ks.getKey(alias, null);
    if (key == null) {
        println("could not find key with alias '" + alias + "'");
        return null;
    }

    Certificate cert = ks.getCertificate(alias);
    if (cert == null) {
        println("could not find certificate to verify signature");
        return null;
    }
    PublicKey pubKey = cert.getPublicKey();

    String sigAlgo = getSignatureAlgo(pubKey);
    println("signature algorithm: " + sigAlgo);
    Signature sig = Signature.getInstance(sigAlgo, XiSecurityConstants.PROVIDER_NAME_XIPKI);
    sig.initSign(key);

    byte[] data = new byte[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    sig.update(data);
    byte[] signature = sig.sign(); // CHECKSTYLE:SKIP
    println("signature created successfully");

    Signature ver = Signature.getInstance(sigAlgo, "BC");
    ver.initVerify(pubKey);
    ver.update(data);
    boolean valid = ver.verify(signature);
    println("signature valid: " + valid);
    return null;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
/**
 * Retrieve the public key mapped to a particular name.
 * If the key has expired, a KeyException is thrown.
 */
PublicKey getPublicKeyAlias(String name) throws KeyStoreException {
    if (keyStore == null) {
        return null;
    }

    Certificate cert = keyStore.getCertificate(name);
    if (cert == null) {
        return null;
    }
    PublicKey pubKey = cert.getPublicKey();
    return pubKey;
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
/**
 * Establishes a certificate chain (using trusted certificates in the
 * keystore), starting with the user certificate
 * and ending at a self-signed certificate found in the keystore.
 *
 * @param userCert the user certificate of the alias
 * @param certToVerify the single certificate provided in the reply
 */
private Certificate[] establishCertChain(Certificate userCert,
                                         Certificate certToVerify)
    throws Exception
{
    if (userCert != null) {
        // Make sure that the public key of the certificate reply matches
        // the original public key in the keystore
        PublicKey origPubKey = userCert.getPublicKey();
        PublicKey replyPubKey = certToVerify.getPublicKey();
        if (!origPubKey.equals(replyPubKey)) {
            throw new Exception(rb.getString
                    ("Public.keys.in.reply.and.keystore.don.t.match"));
        }

        // If the two certs are identical, we're done: no need to import
        // anything
        if (certToVerify.equals(userCert)) {
            throw new Exception(rb.getString
                    ("Certificate.reply.and.certificate.in.keystore.are.identical"));
        }
    }

    // Build a hash table of all certificates in the keystore.
    // Use the subject distinguished name as the key into the hash table.
    // All certificates associated with the same subject distinguished
    // name are stored in the same hash table entry as a vector.
    Hashtable<Principal, Vector<Certificate>> certs = null;
    if (keyStore.size() > 0) {
        certs = new Hashtable<Principal, Vector<Certificate>>(11);
        keystorecerts2Hashtable(keyStore, certs);
    }
    if (trustcacerts) {
        if (caks!=null && caks.size()>0) {
            if (certs == null) {
                certs = new Hashtable<Principal, Vector<Certificate>>(11);
            }
            keystorecerts2Hashtable(caks, certs);
        }
    }

    // start building chain
    Vector<Certificate> chain = new Vector<>(2);
    if (buildChain((X509Certificate)certToVerify, chain, certs)) {
        Certificate[] newChain = new Certificate[chain.size()];
        // buildChain() returns chain with self-signed root-cert first and
        // user-cert last, so we need to invert the chain before we store
        // it
        int j=0;
        for (int i=chain.size()-1; i>=0; i--) {
            newChain[j] = chain.elementAt(i);
            j++;
        }
        return newChain;
    } else {
        throw new Exception
            (rb.getString("Failed.to.establish.chain.from.reply"));
    }
}
 

import java.security.cert.Certificate; //導入方法依賴的package包/類
/**
 * Fetches the public key matching the given alias from the defined key
 * store.
 *
 * @param path absolute path of the trust store file
 * @param password trust store password
 * @param publicKeyAlias alias of the public key in the trust store
 * @return public key with the given alias
 */
public static PublicKey getPublicKey(String path, String password, String publicKeyAlias) {
    try (FileInputStream fis = new java.io.FileInputStream(path)) {
        KeyStore keyStore = KeyStore.getInstance("jks");
        keyStore.load(fis, password.toCharArray());
        Certificate cert;
        cert = keyStore.getCertificate(publicKeyAlias);
        return cert.getPublicKey();
    } catch (KeyStoreException | IOException | NoSuchAlgorithmException | CertificateException ex) {
        LOGGER.error(ex.getMessage(), ex);
        throw new XRd4JRuntimeException(ex.getMessage());
    }
}