Example usage for java.security.cert Certificate getPublicKey

Introduction

In this page you can find the example usage for java.security.cert Certificate getPublicKey.

Prototype

public abstract PublicKey getPublicKey();

Source Link

Document

Gets the public key from this certificate.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    FileInputStream is = new FileInputStream("your.keystore");

    KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
    keystore.load(is, "my-keystore-password".toCharArray());

    String alias = "myalias";

    Key key = keystore.getKey(alias, "password".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
        new KeyPair(publicKey, (PrivateKey) key);
    }//from w  w w.  jav a 2 s. c  o  m
}

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From source file:MainClass.java

public static void main(String args[]) throws Exception {

    Certificate[] certpath = new Certificate[args.length - 1];
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    int i;/* w ww.  j a v  a2s .  co m*/
    for (i = 0; i < args.length - 1; i++) {
        FileInputStream in = new FileInputStream(args[i]);
        certpath[i] = cf.generateCertificate(in);
    }
    FileInputStream in = new FileInputStream(args[i]);
    Certificate trust = cf.generateCertificate(in);

    boolean pass = false;
    String reason = "";
    for (i = 0; i < certpath.length; i++) {
        try {
            PublicKey pbk;
            if (i == certpath.length - 1) {
                pbk = trust.getPublicKey();
            } else {
                pbk = certpath[i + 1].getPublicKey();
            }
            certpath[i].verify(pbk);
            pass = true;
        } catch (Exception e) {
            pass = false;
            reason += i + "  " + e.toString();
            break;
        }
    }
    System.out.println(pass);
}

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From source file:MainClass.java

public static void main(String args[]) throws Exception {
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    List mylist = new ArrayList();
    for (int i = 0; i < args.length; i++) {
        FileInputStream in = new FileInputStream(args[i]);
        Certificate c = cf.generateCertificate(in);
        mylist.add(c);/*from w  ww .j a  v a2  s.  c o m*/
    }
    CertPath cp = cf.generateCertPath(mylist);
    List cplist = cp.getCertificates();
    Object[] o = cplist.toArray();
    for (int i = 0; i < o.length; i++) {
        X509Certificate c = (X509Certificate) o[i];
        System.out.println(c.getSubjectDN());
        byte[] pbk = c.getPublicKey().getEncoded();
        for (int j = 0; j < pbk.length; j++) {
            System.out.print(pbk[j] + ",");
        }
        System.out.println("\nIssued by " + c.getIssuerDN());
    }
}

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From source file:Main.java

/**
 * Returns SHA256 hash of the public key of a given certificate.
 *
 * @param cert the cert that should be used to retrieve the public key from.
 * @return SHA256 hash of the public key.
 *//*from   w w  w . j a v  a2  s. c o m*/
public static byte[] getPublicKeySha256(Certificate cert) {
    try {
        byte[] publicKey = cert.getPublicKey().getEncoded();
        MessageDigest digest = MessageDigest.getInstance("SHA-256");
        return digest.digest(publicKey);
    } catch (NoSuchAlgorithmException ex) {
        // This exception should never happen since SHA-256 is known algorithm
        throw new RuntimeException(ex);
    }
}

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From source file:Main.java

public static String executeHttpsPost(String url, String data, InputStream key) {
    HttpsURLConnection localHttpsURLConnection = null;
    try {/*from  w w w  .j a  v  a  2 s .com*/
        URL localURL = new URL(url);
        localHttpsURLConnection = (HttpsURLConnection) localURL.openConnection();
        localHttpsURLConnection.setRequestMethod("POST");
        localHttpsURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        localHttpsURLConnection.setRequestProperty("Content-Length",
                "" + Integer.toString(data.getBytes().length));
        localHttpsURLConnection.setRequestProperty("Content-Language", "en-US");

        localHttpsURLConnection.setUseCaches(false);
        localHttpsURLConnection.setDoInput(true);
        localHttpsURLConnection.setDoOutput(true);

        localHttpsURLConnection.connect();
        Certificate[] arrayOfCertificate = localHttpsURLConnection.getServerCertificates();

        byte[] arrayOfByte1 = new byte[294];
        DataInputStream localDataInputStream = new DataInputStream(key);
        localDataInputStream.readFully(arrayOfByte1);
        localDataInputStream.close();

        Certificate localCertificate = arrayOfCertificate[0];
        PublicKey localPublicKey = localCertificate.getPublicKey();
        byte[] arrayOfByte2 = localPublicKey.getEncoded();

        for (int i = 0; i < arrayOfByte2.length; i++) {
            if (arrayOfByte2[i] != arrayOfByte1[i])
                throw new RuntimeException("Public key mismatch");
        }

        DataOutputStream localDataOutputStream = new DataOutputStream(
                localHttpsURLConnection.getOutputStream());
        localDataOutputStream.writeBytes(data);
        localDataOutputStream.flush();
        localDataOutputStream.close();

        InputStream localInputStream = localHttpsURLConnection.getInputStream();
        BufferedReader localBufferedReader = new BufferedReader(new InputStreamReader(localInputStream));

        StringBuffer localStringBuffer = new StringBuffer();
        String str1;
        while ((str1 = localBufferedReader.readLine()) != null) {
            localStringBuffer.append(str1);
            localStringBuffer.append('\r');
        }
        localBufferedReader.close();

        return localStringBuffer.toString();
    } catch (Exception localException) {
        byte[] arrayOfByte1;
        localException.printStackTrace();
        return null;
    } finally {
        if (localHttpsURLConnection != null)
            localHttpsURLConnection.disconnect();
    }
}

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From source file:com.vmware.identity.rest.core.util.RequestSigner.java

/**
 * Verify a signed request using a hex-formatted string, the string to sign, and a
 * certificate's public key./*from   ww w  .  j a va2  s. c om*/
 *
 * @param signedRequestHex a hex-encoded string representing the signed request to verify.
 * @param stringToSign the string that will be signed with the public key for
 * verification purposes.
 * @param certificate the certificate containing the public key used for verification.
 * @return true if the signature was verified, false if not.
 * @throws DecoderException if there is an error decoding the hex string.
 * @throws InvalidKeyException if the public key is invalid.
 * @throws SignatureException if the signature algorithm is unable to process the input
 * data provided.
 */
public static boolean verify(String signedRequestHex, String stringToSign, Certificate certificate)
        throws DecoderException, InvalidKeyException, SignatureException {
    return verify(signedRequestHex, stringToSign, certificate.getPublicKey());
}

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From source file:kr.co.exsoft.eframework.util.LicenseUtil.java

/**
 * //from w  w  w. j a va 2s  . c  o  m
 * <pre>
 * 1.  : ??   APPLICATION
 * 2.  :
 * </pre>
 * @Method Name : decipherLicenseKey
 * @param licenseKey
 * @return String
 * @throws Exception
 */
public static String decipherLicenseKey(String licenseKey) throws Exception {

    String ret = null;

    if (StringUtils.isNotBlank(licenseKey)) {

        // ??   ? public key ?
        URL url = ClassLoader.getSystemResource("kr/co/exsoft/eframework/cert/exsoft.cer");
        FileInputStream certfis = new FileInputStream(new File(url.getFile()));

        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        Certificate cert = cf.generateCertificate(certfis);

        PublicKey key = cert.getPublicKey();

        // ??  .
        ret = unspell(licenseKey, key);
    }

    return ret;
}

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From source file:org.apache.ofbiz.base.util.KeyStoreUtil.java

public static String pemToPkHex(String certString) throws IOException, CertificateException {
    Certificate cert = pemToCert(certString);
    return StringUtil.toHexString(cert.getPublicKey().getEncoded());
}

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From source file:com.qm.frame.infrastructure.util.ValidateLicense.java

/**
 * License/*from  ww  w .j a  v a 2 s . co  m*/
 * 
 * @param licenseColl LicenseColl
 * @param path String
 * @return boolean
 */
public static boolean validateLicense(LicenseColl licenseColl, String path) {
    // ??
    boolean payedUser = true;
    List<String> macAddressList = CollectMacAddress.getMacAddress();
    for (LicenseInfo licenseInfo : licenseColl.getLicenseInfoList()) {
        String productName = licenseInfo.getProductName();
        String expirationDate = licenseInfo.getExpiration();
        String signature = licenseInfo.getSignature();
        boolean flag = false;
        String data = new StringBuffer().append(productName).append(expirationDate).toString();
        java.security.cert.CertificateFactory cf;
        try {
            cf = java.security.cert.CertificateFactory.getInstance("X.509");

            java.security.cert.Certificate cert = cf
                    .generateCertificate(new FileInputStream(path + "/WEB-INF/qm.cer"));

            // 
            PublicKey pubKey = cert.getPublicKey();
            // ??Signature
            Signature sig = Signature.getInstance("SHA1withDSA");
            sig.initVerify(pubKey);
            sig.update(InternationalizationUtil.getBytes(data));
            // ?License
            boolean verifies = sig.verify(Base64.decode((InternationalizationUtil.getBytes(signature))));
            if (verifies) {
                Date evalDate = DateTimeUtil.parseDate(expirationDate);
                if (evalDate.before(new Date())) {
                    // ?
                    payedUser = false;
                } else {
                    flag = true;
                    payedUser = true;
                    System.out.println(
                            "" + productName + " License" + expirationDate + "?");
                }
            }
        } catch (Exception e) {
            log.error("", e);
        }

        if (!flag) {
            payedUser = false;
            System.out.println(
                    "" + productName + " License??License?");
        }
    }
    return payedUser;
}

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From source file:com.icanft.common.startup.ValidateLicense.java

/**
 * License//w w w .j ava 2 s  .co m
 * 
 * @param licenseColl LicenseColl
 * @param path String
 * @return boolean
 */
public static boolean validateLicense(LicenseColl licenseColl, String path) {
    // ??
    boolean payedUser = true;
    List<String> macAddressList = CollectMacAddress.getMacAddress();
    for (LicenseInfo licenseInfo : licenseColl.getLicenseInfoList()) {
        String productName = licenseInfo.getProductName();
        String expirationDate = licenseInfo.getExpiration();
        String signature = licenseInfo.getSignature();
        boolean flag = false;
        String data = new StringBuffer().append(productName).append(expirationDate).toString();
        java.security.cert.CertificateFactory cf;
        try {
            cf = java.security.cert.CertificateFactory.getInstance("X.509");

            java.security.cert.Certificate cert = cf
                    .generateCertificate(new FileInputStream(path + "/WEB-INF/fbrp.cer"));

            // 
            PublicKey pubKey = cert.getPublicKey();
            // ??Signature
            Signature sig = Signature.getInstance("SHA1withDSA");
            sig.initVerify(pubKey);
            sig.update(InternationalizationUtil.getBytes(data));
            // ?License
            boolean verifies = true;
            //                  sig.verify(Base64.decodeBase64(InternationalizationUtil
            //                  .getBytes(signature)));
            if (verifies) {
                Date evalDate = DateTimeUtil.parseDate(expirationDate);
                if (evalDate.before(new Date())) {
                    // ?
                    payedUser = false;
                } else {
                    flag = true;
                    payedUser = true;
                    System.out.println(
                            "" + productName + " License" + expirationDate + "?");
                }
            }
        } catch (Exception e) {
            log.error("", e);
        }

        if (!flag) {
            payedUser = false;
            System.out.println(
                    "" + productName + " License??License?");
        }
    }
    return payedUser;
}

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