Java Code Examples for java.security.AlgorithmParameters#init()

private AlgorithmParameters getAlgorithmParameters(String algorithm)
    throws IOException
{
    AlgorithmParameters algParams = null;

    // create PBE parameters from salt and iteration count
    PBEParameterSpec paramSpec =
            new PBEParameterSpec(getSalt(), iterationCount);
    try {
       algParams = AlgorithmParameters.getInstance(algorithm);
       algParams.init(paramSpec);
    } catch (Exception e) {
       throw new IOException("getAlgorithmParameters failed: " +
                             e.getMessage(), e);
    }
    return algParams;
}
 

private static boolean isAvailableCurve(int curveId) {
    String oid = idToOidMap.get(curveId);
    if (oid != null) {
        AlgorithmParameters params = null;
        try {
            params = JsseJce.getAlgorithmParameters("EC");
            params.init(new ECGenParameterSpec(oid));
        } catch (Exception e) {
            return false;
        }

        // cache the parameters
        idToParams.put(curveId, params);

        return true;
    }

    return false;
}
 

private static byte[] testParams(AlgorithmParameters rc2Params,
    RC2ParameterSpec rc2Spec) throws Exception {

    // test getParameterSpec returns object equal to input
    rc2Params.init(rc2Spec);
    RC2ParameterSpec rc2OtherSpec = (RC2ParameterSpec)
        rc2Params.getParameterSpec(RC2ParameterSpec.class);
    if (!rc2Spec.equals(rc2OtherSpec)) {
        throw new Exception("AlgorithmParameterSpecs should be equal");
    }

    // test RC2ParameterSpec with RC2 Cipher
    Cipher rc2Cipher = Cipher.getInstance("RC2/CBC/PKCS5PADDING", "SunJCE");
    rc2Cipher.init(Cipher.ENCRYPT_MODE,
        new SecretKeySpec("secret".getBytes("ASCII"), "RC2"), rc2Spec);

    // get IV
    byte[] iv = rc2Cipher.getIV();
    if (!Arrays.equals(iv, rc2Spec.getIV())) {
        throw new Exception("ivs should be equal");
    }

    // test encoding and decoding
    byte[] encoded = rc2Params.getEncoded();
    AlgorithmParameters params = AlgorithmParameters.getInstance("RC2");
    params.init(encoded);

    // test RC2 AlgorithmParameters with RC2 Cipher
    rc2Cipher.init(Cipher.ENCRYPT_MODE,
        new SecretKeySpec("secret".getBytes("ASCII"), "RC2"), params);

    // get IV
    iv = rc2Cipher.getIV();
    if (!Arrays.equals(iv, rc2Spec.getIV())) {
        throw new Exception("ivs should be equal");
    }
    return encoded;
}
 

/**
 * Creates an EcCurve from a curve name
 * 
 * @param curveName
 * @return
 * @throws GeneralSecurityException
 */
public static EcCurveImpl createByName(final String curveName) {
	try {
		final AlgorithmParameters parameters = AlgorithmParameters.getInstance("EC");
		parameters.init(new ECGenParameterSpec(curveName));
		final ECParameterSpec parameterSpec = parameters.getParameterSpec(ECParameterSpec.class);
		return new EcCurveImpl(parameterSpec);
	} catch (GeneralSecurityException e) {
		throw new RuntimeException(e);
	}
}
 

private AlgorithmParameters parseAlgParameters(ObjectIdentifier algorithm,
    DerInputStream in) throws IOException
{
    AlgorithmParameters algParams = null;
    try {
        DerValue params;
        if (in.available() == 0) {
            params = null;
        } else {
            params = in.getDerValue();
            if (params.tag == DerValue.tag_Null) {
               params = null;
            }
        }
        if (params != null) {
            if (algorithm.equals((Object)pbes2_OID)) {
                algParams = AlgorithmParameters.getInstance("PBES2");
            } else {
                algParams = AlgorithmParameters.getInstance("PBE");
            }
            algParams.init(params.toByteArray());
        }
    } catch (Exception e) {
       throw new IOException("parseAlgParameters failed: " +
                             e.getMessage(), e);
    }
    return algParams;
}
 

private static byte[] testParams(AlgorithmParameters rc2Params,
    RC2ParameterSpec rc2Spec) throws Exception {

    // test getParameterSpec returns object equal to input
    rc2Params.init(rc2Spec);
    RC2ParameterSpec rc2OtherSpec = (RC2ParameterSpec)
        rc2Params.getParameterSpec(RC2ParameterSpec.class);
    if (!rc2Spec.equals(rc2OtherSpec)) {
        throw new Exception("AlgorithmParameterSpecs should be equal");
    }

    // test RC2ParameterSpec with RC2 Cipher
    Cipher rc2Cipher = Cipher.getInstance("RC2/CBC/PKCS5PADDING", "SunJCE");
    rc2Cipher.init(Cipher.ENCRYPT_MODE,
        new SecretKeySpec("secret".getBytes("ASCII"), "RC2"), rc2Spec);

    // get IV
    byte[] iv = rc2Cipher.getIV();
    if (!Arrays.equals(iv, rc2Spec.getIV())) {
        throw new Exception("ivs should be equal");
    }

    // test encoding and decoding
    byte[] encoded = rc2Params.getEncoded();
    AlgorithmParameters params = AlgorithmParameters.getInstance("RC2");
    params.init(encoded);

    // test RC2 AlgorithmParameters with RC2 Cipher
    rc2Cipher.init(Cipher.ENCRYPT_MODE,
        new SecretKeySpec("secret".getBytes("ASCII"), "RC2"), params);

    // get IV
    iv = rc2Cipher.getIV();
    if (!Arrays.equals(iv, rc2Spec.getIV())) {
        throw new Exception("ivs should be equal");
    }
    return encoded;
}
 

private AlgorithmParameters parseAlgParameters(ObjectIdentifier algorithm,
    DerInputStream in) throws IOException
{
    AlgorithmParameters algParams = null;
    try {
        DerValue params;
        if (in.available() == 0) {
            params = null;
        } else {
            params = in.getDerValue();
            if (params.tag == DerValue.tag_Null) {
               params = null;
            }
        }
        if (params != null) {
            if (algorithm.equals((Object)pbes2_OID)) {
                algParams = AlgorithmParameters.getInstance("PBES2");
            } else {
                algParams = AlgorithmParameters.getInstance("PBE");
            }
            algParams.init(params.toByteArray());
        }
    } catch (Exception e) {
       throw new IOException("parseAlgParameters failed: " +
                             e.getMessage(), e);
    }
    return algParams;
}
 

private static byte[] testParams(AlgorithmParameters rc2Params,
    RC2ParameterSpec rc2Spec) throws Exception {

    // test getParameterSpec returns object equal to input
    rc2Params.init(rc2Spec);
    RC2ParameterSpec rc2OtherSpec = (RC2ParameterSpec)
        rc2Params.getParameterSpec(RC2ParameterSpec.class);
    if (!rc2Spec.equals(rc2OtherSpec)) {
        throw new Exception("AlgorithmParameterSpecs should be equal");
    }

    // test RC2ParameterSpec with RC2 Cipher
    Cipher rc2Cipher = Cipher.getInstance("RC2/CBC/PKCS5PADDING", "SunJCE");
    rc2Cipher.init(Cipher.ENCRYPT_MODE,
        new SecretKeySpec("secret".getBytes("ASCII"), "RC2"), rc2Spec);

    // get IV
    byte[] iv = rc2Cipher.getIV();
    if (!Arrays.equals(iv, rc2Spec.getIV())) {
        throw new Exception("ivs should be equal");
    }

    // test encoding and decoding
    byte[] encoded = rc2Params.getEncoded();
    AlgorithmParameters params = AlgorithmParameters.getInstance("RC2");
    params.init(encoded);

    // test RC2 AlgorithmParameters with RC2 Cipher
    rc2Cipher.init(Cipher.ENCRYPT_MODE,
        new SecretKeySpec("secret".getBytes("ASCII"), "RC2"), params);

    // get IV
    iv = rc2Cipher.getIV();
    if (!Arrays.equals(iv, rc2Spec.getIV())) {
        throw new Exception("ivs should be equal");
    }
    return encoded;
}
 

/**
 * Protects the given cleartext private key, using the password provided at
 * construction time.
 */
byte[] protect(PrivateKey key)
    throws Exception
{
    // create a random salt (8 bytes)
    byte[] salt = new byte[8];
    SunJCE.getRandom().nextBytes(salt);

    // create PBE parameters from salt and iteration count
    PBEParameterSpec pbeSpec = new PBEParameterSpec(salt, ITERATION_COUNT);

    // create PBE key from password
    PBEKeySpec pbeKeySpec = new PBEKeySpec(this.password);
    SecretKey sKey = null;
    PBEWithMD5AndTripleDESCipher cipher;
    try {
        sKey = new PBEKey(pbeKeySpec, "PBEWithMD5AndTripleDES", false);
        // encrypt private key
        cipher = new PBEWithMD5AndTripleDESCipher();
        cipher.engineInit(Cipher.ENCRYPT_MODE, sKey, pbeSpec, null);
    } finally {
        pbeKeySpec.clearPassword();
        if (sKey != null) sKey.destroy();
    }
    byte[] plain = key.getEncoded();
    byte[] encrKey = cipher.engineDoFinal(plain, 0, plain.length);
    Arrays.fill(plain, (byte) 0x00);

    // wrap encrypted private key in EncryptedPrivateKeyInfo
    // (as defined in PKCS#8)
    AlgorithmParameters pbeParams =
        AlgorithmParameters.getInstance("PBE", SunJCE.getInstance());
    pbeParams.init(pbeSpec);

    AlgorithmId encrAlg = new AlgorithmId
        (new ObjectIdentifier(PBE_WITH_MD5_AND_DES3_CBC_OID), pbeParams);
    return new EncryptedPrivateKeyInfo(encrAlg,encrKey).getEncoded();
}
 

@Override
@SneakyThrows
public byte[] decrypt(byte[] encryptedMessage) {
    int paramsLength = Byte.toUnsignedInt(encryptedMessage[0]);
    int messageLength = encryptedMessage.length - paramsLength - 1;
    byte[] params = new byte[paramsLength];
    byte[] message = new byte[messageLength];
    System.arraycopy(encryptedMessage, 1, params, 0, paramsLength);
    System.arraycopy(encryptedMessage, paramsLength + 1, message, 0, messageLength);

    // create Key
    final SecretKeyFactory factory = SecretKeyFactory.getInstance(algorithm);
    final PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
    SecretKey key = factory.generateSecret(keySpec);

    // Build parameters
    AlgorithmParameters algorithmParameters = AlgorithmParameters.getInstance(algorithm);
    algorithmParameters.init(params);

    // Build Cipher
    final Cipher cipherDecrypt = Cipher.getInstance(algorithm);
    cipherDecrypt.init(
            Cipher.DECRYPT_MODE,
            key,
            algorithmParameters
    );


    return cipherDecrypt.doFinal(message);
}
 

/**
 * 生成AES/CBC/PKCS7Padding专用的IV
 * ECB模式只用密钥即可对数据进行加解密,CBC模式需要添加一个参数IV
 * IV是一个16字节的数组,这里采用和IOS一样的构造方法,数据全为0
 */
private static AlgorithmParameters initIV(){
    byte[] iv = new byte[16];
    Arrays.fill(iv, (byte)0x00);
    AlgorithmParameters params;
    try {
        params = AlgorithmParameters.getInstance(ALGORITHM_AES_PKCS7);
        params.init(new IvParameterSpec(iv));
    } catch (Exception e) {
        throw new IllegalArgumentException("生成"+ALGORITHM_CIPHER_AES_PKCS7+"专用的IV时失败", e);
    }
    return params;
}
 

public static JSONObject getUserInfo(String encryptedData, String sessionKey, String iv) {
    // 被加密的数据
    byte[] dataByte = Base64.decode(encryptedData);
    // 加密秘钥
    byte[] keyByte = Base64.decode(sessionKey);
    // 偏移量
    byte[] ivByte = Base64.decode(iv);
    try {
        // 如果密钥不足16位，那么就补足.  这个if 中的内容很重要
        int base = 16;
        if (keyByte.length % base != 0) {
            int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
            byte[] temp = new byte[groups * base];
            Arrays.fill(temp, (byte) 0);
            System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
            keyByte = temp;
        }
        // 初始化
        Security.addProvider(new BouncyCastleProvider());
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
        SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
        AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
        parameters.init(new IvParameterSpec(ivByte));
        cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
        byte[] resultByte = cipher.doFinal(dataByte);
        if (null != resultByte && resultByte.length > 0) {
            String result = new String(resultByte, "UTF-8");
            return JSON.parseObject(result);
        }
    } catch (Exception e) {
    }
    return null;
}
 

/**
 * Protects the given cleartext private key, using the password provided at
 * construction time.
 */
byte[] protect(PrivateKey key)
    throws Exception
{
    // create a random salt (8 bytes)
    byte[] salt = new byte[8];
    SunJCE.getRandom().nextBytes(salt);

    // create PBE parameters from salt and iteration count
    PBEParameterSpec pbeSpec = new PBEParameterSpec(salt, 20);

    // create PBE key from password
    PBEKeySpec pbeKeySpec = new PBEKeySpec(this.password);
    SecretKey sKey = new PBEKey(pbeKeySpec, "PBEWithMD5AndTripleDES");
    pbeKeySpec.clearPassword();

    // encrypt private key
    PBEWithMD5AndTripleDESCipher cipher;
    cipher = new PBEWithMD5AndTripleDESCipher();
    cipher.engineInit(Cipher.ENCRYPT_MODE, sKey, pbeSpec, null);
    byte[] plain = key.getEncoded();
    byte[] encrKey = cipher.engineDoFinal(plain, 0, plain.length);

    // wrap encrypted private key in EncryptedPrivateKeyInfo
    // (as defined in PKCS#8)
    AlgorithmParameters pbeParams =
        AlgorithmParameters.getInstance("PBE", SunJCE.getInstance());
    pbeParams.init(pbeSpec);

    AlgorithmId encrAlg = new AlgorithmId
        (new ObjectIdentifier(PBE_WITH_MD5_AND_DES3_CBC_OID), pbeParams);
    return new EncryptedPrivateKeyInfo(encrAlg,encrKey).getEncoded();
}
 

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

        // Prepare a JKS keystore with many entries
        new File(JKSFILE).delete();
        for (int i=0; i<SIZE; i++) {
            System.err.print(".");
            String cmd = "-keystore " + JKSFILE
                    + " -storepass changeit -keypass changeit -keyalg rsa "
                    + "-genkeypair -alias p" + i + " -dname CN=" + i;
            sun.security.tools.keytool.Main.main(cmd.split(" "));
        }

        // Prepare EncryptedPrivateKeyInfo parameters, copied from various
        // places in PKCS12KeyStore.java
        AlgorithmParameters algParams =
                AlgorithmParameters.getInstance("PBEWithSHA1AndDESede");
        algParams.init(new PBEParameterSpec("12345678".getBytes(), 1024));
        AlgorithmId algid = new AlgorithmId(
                new ObjectIdentifier("1.2.840.113549.1.12.1.3"), algParams);

        PBEKeySpec keySpec = new PBEKeySpec(PASSWORD);
        SecretKeyFactory skFac = SecretKeyFactory.getInstance("PBE");
        SecretKey skey = skFac.generateSecret(keySpec);

        Cipher cipher = Cipher.getInstance("PBEWithSHA1AndDESede");
        cipher.init(Cipher.ENCRYPT_MODE, skey, algParams);

        // Pre-calculated keys and certs and aliases
        byte[][] keys = new byte[SIZE][];
        Certificate[][] certChains = new Certificate[SIZE][];
        String[] aliases = new String[SIZE];

        // Reads from JKS keystore and pre-calculate
        KeyStore ks = KeyStore.getInstance("jks");
        try (FileInputStream fis = new FileInputStream(JKSFILE)) {
            ks.load(fis, PASSWORD);
        }
        for (int i=0; i<SIZE; i++) {
            aliases[i] = "p" + i;
            byte[] enckey = cipher.doFinal(
                    ks.getKey(aliases[i], PASSWORD).getEncoded());
            keys[i] = new EncryptedPrivateKeyInfo(algid, enckey).getEncoded();
            certChains[i] = ks.getCertificateChain(aliases[i]);
        }

        // Write into PKCS12 keystore. Use this overloaded version of
        // setKeyEntry() to be as fast as possible, so that they would
        // have same localKeyId.
        KeyStore p12 = KeyStore.getInstance("pkcs12");
        p12.load(null, PASSWORD);
        for (int i=0; i<SIZE; i++) {
            p12.setKeyEntry(aliases[i], keys[i], certChains[i]);
        }
        try (FileOutputStream fos = new FileOutputStream(P12FILE)) {
            p12.store(fos, PASSWORD);
        }

        // Check private keys still match certs
        p12 = KeyStore.getInstance("pkcs12");
        try (FileInputStream fis = new FileInputStream(P12FILE)) {
            p12.load(fis, PASSWORD);
        }
        for (int i=0; i<SIZE; i++) {
            String a = "p" + i;
            X509Certificate x = (X509Certificate)p12.getCertificate(a);
            X500Name name = (X500Name)x.getSubjectDN();
            if (!name.getCommonName().equals(""+i)) {
                throw new Exception(a + "'s cert is " + name);
            }
        }
    }
 

private NamedGroup(int id, NamedGroupType type, String name,
        String oid, String algorithm, boolean isFips,
        ProtocolVersion[] supportedProtocols,
        AlgorithmParameterSpec keAlgParamSpec) {
    this.id = id;
    this.type = type;
    this.name = name;
    this.oid = oid;
    this.algorithm = algorithm;
    this.isFips = isFips;
    this.supportedProtocols = supportedProtocols;
    this.keAlgParamSpec = keAlgParamSpec;

    boolean mediator = (keAlgParamSpec != null);

    // An EC provider, for example the SunEC provider, may support
    // AlgorithmParameters but not KeyPairGenerator or KeyAgreement.
    if (mediator && (type == NamedGroupType.NAMED_GROUP_ECDHE)) {
        mediator = JsseJce.isEcAvailable();
    }
    // Check the specific algorithm parameters.
    if (mediator) {
        try {
            AlgorithmParameters algParams =
                AlgorithmParameters.getInstance(type.algorithm);
            algParams.init(keAlgParamSpec);
        } catch (InvalidParameterSpecException
                | NoSuchAlgorithmException exp) {
            if (type != NamedGroupType.NAMED_GROUP_XDH) {
                mediator = false;
                if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
                    SSLLogger.warning(
                        "No AlgorithmParameters for " + name, exp);
                }
            } else {
                // Please remove the following code if the XDH/X25519/X448
                // AlgorithmParameters algorithms are supported in JDK.
                try {
                    KeyAgreement.getInstance(name);

                    // The following service is also needed.  But for
                    // performance, check the KeyAgreement impl only.
                    //
                    // KeyFactory.getInstance(name);
                    // KeyPairGenerator.getInstance(name);
                    // AlgorithmParameters.getInstance(name);
                } catch (NoSuchAlgorithmException nsae) {
                    mediator = false;
                    if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
                        SSLLogger.warning(
                            "No AlgorithmParameters for " + name, nsae);
                    }
                }
            }
        }
    }
    this.isAvailable = mediator;
}
 

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

        // Prepare a JKS keystore with many entries
        new File(JKSFILE).delete();
        for (int i=0; i<SIZE; i++) {
            System.err.print(".");
            String cmd = "-keystore " + JKSFILE
                    + " -storepass changeit -keypass changeit -keyalg rsa "
                    + "-genkeypair -alias p" + i + " -dname CN=" + i;
            sun.security.tools.keytool.Main.main(cmd.split(" "));
        }

        // Prepare EncryptedPrivateKeyInfo parameters, copied from various
        // places in PKCS12KeyStore.java
        AlgorithmParameters algParams =
                AlgorithmParameters.getInstance("PBEWithSHA1AndDESede");
        algParams.init(new PBEParameterSpec("12345678".getBytes(), 1024));
        AlgorithmId algid = new AlgorithmId(
                new ObjectIdentifier("1.2.840.113549.1.12.1.3"), algParams);

        PBEKeySpec keySpec = new PBEKeySpec(PASSWORD);
        SecretKeyFactory skFac = SecretKeyFactory.getInstance("PBE");
        SecretKey skey = skFac.generateSecret(keySpec);

        Cipher cipher = Cipher.getInstance("PBEWithSHA1AndDESede");
        cipher.init(Cipher.ENCRYPT_MODE, skey, algParams);

        // Pre-calculated keys and certs and aliases
        byte[][] keys = new byte[SIZE][];
        Certificate[][] certChains = new Certificate[SIZE][];
        String[] aliases = new String[SIZE];

        // Reads from JKS keystore and pre-calculate
        KeyStore ks = KeyStore.getInstance("jks");
        try (FileInputStream fis = new FileInputStream(JKSFILE)) {
            ks.load(fis, PASSWORD);
        }
        for (int i=0; i<SIZE; i++) {
            aliases[i] = "p" + i;
            byte[] enckey = cipher.doFinal(
                    ks.getKey(aliases[i], PASSWORD).getEncoded());
            keys[i] = new EncryptedPrivateKeyInfo(algid, enckey).getEncoded();
            certChains[i] = ks.getCertificateChain(aliases[i]);
        }

        // Write into PKCS12 keystore. Use this overloaded version of
        // setKeyEntry() to be as fast as possible, so that they would
        // have same localKeyId.
        KeyStore p12 = KeyStore.getInstance("pkcs12");
        p12.load(null, PASSWORD);
        for (int i=0; i<SIZE; i++) {
            p12.setKeyEntry(aliases[i], keys[i], certChains[i]);
        }
        try (FileOutputStream fos = new FileOutputStream(P12FILE)) {
            p12.store(fos, PASSWORD);
        }

        // Check private keys still match certs
        p12 = KeyStore.getInstance("pkcs12");
        try (FileInputStream fis = new FileInputStream(P12FILE)) {
            p12.load(fis, PASSWORD);
        }
        for (int i=0; i<SIZE; i++) {
            String a = "p" + i;
            X509Certificate x = (X509Certificate)p12.getCertificate(a);
            X500Name name = (X500Name)x.getSubjectDN();
            if (!name.getCommonName().equals(""+i)) {
                throw new Exception(a + "'s cert is " + name);
            }
        }
    }
 

public PublicKey getPublicKey(String alias, JSONObject jwks, Algorithm requestedAlgorithm) throws Exception {
    java.security.PublicKey publicKey = null;

    JSONArray webKeys = jwks.getJSONArray(JSON_WEB_KEY_SET);
    for (int i = 0; i < webKeys.length(); i++) {
        JSONObject key = webKeys.getJSONObject(i);
        if (alias.equals(key.getString(KEY_ID))) {
            AlgorithmFamily family = null;
            if (key.has(ALGORITHM)) {
                Algorithm algorithm = Algorithm.fromString(key.optString(ALGORITHM));

                if (requestedAlgorithm != null && algorithm != requestedAlgorithm) {
                    LOG.trace("kid matched but algorithm does not match. kid algorithm:" + algorithm + ", requestedAlgorithm:" + requestedAlgorithm + ", kid:" + alias);
                    continue;
                }
                family = algorithm.getFamily();
            } else if (key.has(KEY_TYPE)) {
                family = AlgorithmFamily.fromString(key.getString(KEY_TYPE));
            }

            if (AlgorithmFamily.RSA.equals(family)) {
                KeyFactory keyFactory = KeyFactory.getInstance("RSA");
                RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(
                        new BigInteger(1, Base64Util.base64urldecode(key.getString(MODULUS))),
                        new BigInteger(1, Base64Util.base64urldecode(key.getString(EXPONENT))));
                publicKey = keyFactory.generatePublic(pubKeySpec);
            } else if (AlgorithmFamily.EC.equals(family)) {
                ECEllipticCurve curve = ECEllipticCurve.fromString(key.optString(CURVE));
                AlgorithmParameters parameters = AlgorithmParameters.getInstance(AlgorithmFamily.EC.toString());
                parameters.init(new ECGenParameterSpec(curve.getAlias()));
                ECParameterSpec ecParameters = parameters.getParameterSpec(ECParameterSpec.class);

                publicKey = KeyFactory.getInstance(AlgorithmFamily.EC.toString()).generatePublic(new ECPublicKeySpec(
                        new ECPoint(
                                new BigInteger(1, Base64Util.base64urldecode(key.getString(X))),
                                new BigInteger(1, Base64Util.base64urldecode(key.getString(Y)))
                        ), ecParameters));
            }

            if (key.has(EXPIRATION_TIME)) {
                checkKeyExpiration(alias, key.getLong(EXPIRATION_TIME));
            }
        }
    }

    return publicKey;
}
 

Key recover(EncryptedPrivateKeyInfo encrInfo)
    throws UnrecoverableKeyException, NoSuchAlgorithmException
{
    byte[] plain;

    try {
        String encrAlg = encrInfo.getAlgorithm().getOID().toString();
        if (!encrAlg.equals(PBE_WITH_MD5_AND_DES3_CBC_OID)
            && !encrAlg.equals(KEY_PROTECTOR_OID)) {
            throw new UnrecoverableKeyException("Unsupported encryption "
                                                + "algorithm");
        }

        if (encrAlg.equals(KEY_PROTECTOR_OID)) {
            // JDK 1.2 style recovery
            plain = recover(encrInfo.getEncryptedData());
        } else {
            byte[] encodedParams =
                encrInfo.getAlgorithm().getEncodedParams();

            // parse the PBE parameters into the corresponding spec
            AlgorithmParameters pbeParams =
                AlgorithmParameters.getInstance("PBE");
            pbeParams.init(encodedParams);
            PBEParameterSpec pbeSpec =
                    pbeParams.getParameterSpec(PBEParameterSpec.class);
            if (pbeSpec.getIterationCount() > MAX_ITERATION_COUNT) {
                throw new IOException("PBE iteration count too large");
            }

            // create PBE key from password
            PBEKeySpec pbeKeySpec = new PBEKeySpec(this.password);
            SecretKey sKey =
                new PBEKey(pbeKeySpec, "PBEWithMD5AndTripleDES");
            pbeKeySpec.clearPassword();

            // decrypt private key
            PBEWithMD5AndTripleDESCipher cipher;
            cipher = new PBEWithMD5AndTripleDESCipher();
            cipher.engineInit(Cipher.DECRYPT_MODE, sKey, pbeSpec, null);
            plain=cipher.engineDoFinal(encrInfo.getEncryptedData(), 0,
                                       encrInfo.getEncryptedData().length);
        }

        // determine the private-key algorithm, and parse private key
        // using the appropriate key factory
        String oidName = new AlgorithmId
            (new PrivateKeyInfo(plain).getAlgorithm().getOID()).getName();
        KeyFactory kFac = KeyFactory.getInstance(oidName);
        return kFac.generatePrivate(new PKCS8EncodedKeySpec(plain));

    } catch (NoSuchAlgorithmException ex) {
        // Note: this catch needed to be here because of the
        // later catch of GeneralSecurityException
        throw ex;
    } catch (IOException ioe) {
        throw new UnrecoverableKeyException(ioe.getMessage());
    } catch (GeneralSecurityException gse) {
        throw new UnrecoverableKeyException(gse.getMessage());
    }
}
 

Key recover(EncryptedPrivateKeyInfo encrInfo)
    throws UnrecoverableKeyException, NoSuchAlgorithmException
{
    byte[] plain;

    try {
        String encrAlg = encrInfo.getAlgorithm().getOID().toString();
        if (!encrAlg.equals(PBE_WITH_MD5_AND_DES3_CBC_OID)
            && !encrAlg.equals(KEY_PROTECTOR_OID)) {
            throw new UnrecoverableKeyException("Unsupported encryption "
                                                + "algorithm");
        }

        if (encrAlg.equals(KEY_PROTECTOR_OID)) {
            // JDK 1.2 style recovery
            plain = recover(encrInfo.getEncryptedData());
        } else {
            byte[] encodedParams =
                encrInfo.getAlgorithm().getEncodedParams();

            // parse the PBE parameters into the corresponding spec
            AlgorithmParameters pbeParams =
                AlgorithmParameters.getInstance("PBE");
            pbeParams.init(encodedParams);
            PBEParameterSpec pbeSpec =
                    pbeParams.getParameterSpec(PBEParameterSpec.class);

            // create PBE key from password
            PBEKeySpec pbeKeySpec = new PBEKeySpec(this.password);
            SecretKey sKey =
                new PBEKey(pbeKeySpec, "PBEWithMD5AndTripleDES");
            pbeKeySpec.clearPassword();

            // decrypt private key
            PBEWithMD5AndTripleDESCipher cipher;
            cipher = new PBEWithMD5AndTripleDESCipher();
            cipher.engineInit(Cipher.DECRYPT_MODE, sKey, pbeSpec, null);
            plain=cipher.engineDoFinal(encrInfo.getEncryptedData(), 0,
                                       encrInfo.getEncryptedData().length);
        }

        // determine the private-key algorithm, and parse private key
        // using the appropriate key factory
        String oidName = new AlgorithmId
            (new PrivateKeyInfo(plain).getAlgorithm().getOID()).getName();
        KeyFactory kFac = KeyFactory.getInstance(oidName);
        return kFac.generatePrivate(new PKCS8EncodedKeySpec(plain));

    } catch (NoSuchAlgorithmException ex) {
        // Note: this catch needed to be here because of the
        // later catch of GeneralSecurityException
        throw ex;
    } catch (IOException ioe) {
        throw new UnrecoverableKeyException(ioe.getMessage());
    } catch (GeneralSecurityException gse) {
        throw new UnrecoverableKeyException(gse.getMessage());
    }
}
 

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

        // Prepare a JKS keystore with many entries
        new File(JKSFILE).delete();
        for (int i=0; i<SIZE; i++) {
            System.err.print(".");
            String cmd = "-keystore " + JKSFILE
                    + " -storepass changeit -keypass changeit -keyalg rsa "
                    + "-genkeypair -alias p" + i + " -dname CN=" + i;
            sun.security.tools.keytool.Main.main(cmd.split(" "));
        }

        // Prepare EncryptedPrivateKeyInfo parameters, copied from various
        // places in PKCS12KeyStore.java
        AlgorithmParameters algParams =
                AlgorithmParameters.getInstance("PBEWithSHA1AndDESede");
        algParams.init(new PBEParameterSpec("12345678".getBytes(), 1024));
        AlgorithmId algid = new AlgorithmId(
                new ObjectIdentifier("1.2.840.113549.1.12.1.3"), algParams);

        PBEKeySpec keySpec = new PBEKeySpec(PASSWORD);
        SecretKeyFactory skFac = SecretKeyFactory.getInstance("PBE");
        SecretKey skey = skFac.generateSecret(keySpec);

        Cipher cipher = Cipher.getInstance("PBEWithSHA1AndDESede");
        cipher.init(Cipher.ENCRYPT_MODE, skey, algParams);

        // Pre-calculated keys and certs and aliases
        byte[][] keys = new byte[SIZE][];
        Certificate[][] certChains = new Certificate[SIZE][];
        String[] aliases = new String[SIZE];

        // Reads from JKS keystore and pre-calculate
        KeyStore ks = KeyStore.getInstance("jks");
        try (FileInputStream fis = new FileInputStream(JKSFILE)) {
            ks.load(fis, PASSWORD);
        }
        for (int i=0; i<SIZE; i++) {
            aliases[i] = "p" + i;
            byte[] enckey = cipher.doFinal(
                    ks.getKey(aliases[i], PASSWORD).getEncoded());
            keys[i] = new EncryptedPrivateKeyInfo(algid, enckey).getEncoded();
            certChains[i] = ks.getCertificateChain(aliases[i]);
        }

        // Write into PKCS12 keystore. Use this overloaded version of
        // setKeyEntry() to be as fast as possible, so that they would
        // have same localKeyId.
        KeyStore p12 = KeyStore.getInstance("pkcs12");
        p12.load(null, PASSWORD);
        for (int i=0; i<SIZE; i++) {
            p12.setKeyEntry(aliases[i], keys[i], certChains[i]);
        }
        try (FileOutputStream fos = new FileOutputStream(P12FILE)) {
            p12.store(fos, PASSWORD);
        }

        // Check private keys still match certs
        p12 = KeyStore.getInstance("pkcs12");
        try (FileInputStream fis = new FileInputStream(P12FILE)) {
            p12.load(fis, PASSWORD);
        }
        for (int i=0; i<SIZE; i++) {
            String a = "p" + i;
            X509Certificate x = (X509Certificate)p12.getCertificate(a);
            X500Name name = (X500Name)x.getSubjectDN();
            if (!name.getCommonName().equals(""+i)) {
                throw new Exception(a + "'s cert is " + name);
            }
        }
    }