Examples with Service java.security.Provider.Service used on opensource projects

Example 51 with Service

use of java.security.Provider.Service in project jdk8u_jdk by JetBrains.

the class GetInstance method getInstance.

/*
     * For all the getInstance() methods below:
     * @param type the type of engine (e.g. MessageDigest)
     * @param clazz the Spi class that the implementation must subclass
     *   (e.g. MessageDigestSpi.class) or null if no superclass check
     *   is required
     * @param algorithm the name of the algorithm (or alias), e.g. MD5
     * @param provider the provider (String or Provider object)
     * @param param the parameter to pass to the Spi constructor
     *   (for CertStores)
     *
     * There are overloaded methods for all the permutations.
     */
public static Instance getInstance(String type, Class<?> clazz, String algorithm) throws NoSuchAlgorithmException {
    // in the almost all cases, the first service will work
    // avoid taking long path if so
    ProviderList list = Providers.getProviderList();
    Service firstService = list.getService(type, algorithm);
    if (firstService == null) {
        throw new NoSuchAlgorithmException(algorithm + " " + type + " not available");
    }
    NoSuchAlgorithmException failure;
    try {
        return getInstance(firstService, clazz);
    } catch (NoSuchAlgorithmException e) {
        failure = e;
    }
    // fail over to the next
    for (Service s : list.getServices(type, algorithm)) {
        if (s == firstService) {
            // do not retry initial failed service
            continue;
        }
        try {
            return getInstance(s, clazz);
        } catch (NoSuchAlgorithmException e) {
            failure = e;
        }
    }
    throw failure;
}

Example 52 with Service

use of java.security.Provider.Service in project jdk8u_jdk by JetBrains.

the class GetInstance method getService.

public static Service getService(String type, String algorithm) throws NoSuchAlgorithmException {
    ProviderList list = Providers.getProviderList();
    Service s = list.getService(type, algorithm);
    if (s == null) {
        throw new NoSuchAlgorithmException(algorithm + " " + type + " not available");
    }
    return s;
}

Example 53 with Service

use of java.security.Provider.Service in project jdk8u_jdk by JetBrains.

the class Cipher method getInstance.

/**
     * Returns a <code>Cipher</code> object that implements the specified
     * transformation.
     *
     * <p> This method traverses the list of registered security Providers,
     * starting with the most preferred Provider.
     * A new Cipher object encapsulating the
     * CipherSpi implementation from the first
     * Provider that supports the specified algorithm is returned.
     *
     * <p> Note that the list of registered providers may be retrieved via
     * the {@link Security#getProviders() Security.getProviders()} method.
     *
     * @param transformation the name of the transformation, e.g.,
     * <i>DES/CBC/PKCS5Padding</i>.
     * See the Cipher section in the <a href=
     *   "{@docRoot}/../technotes/guides/security/StandardNames.html#Cipher">
     * Java Cryptography Architecture Standard Algorithm Name Documentation</a>
     * for information about standard transformation names.
     *
     * @return a cipher that implements the requested transformation.
     *
     * @exception NoSuchAlgorithmException if <code>transformation</code>
     *          is null, empty, in an invalid format,
     *          or if no Provider supports a CipherSpi implementation for the
     *          specified algorithm.
     *
     * @exception NoSuchPaddingException if <code>transformation</code>
     *          contains a padding scheme that is not available.
     *
     * @see java.security.Provider
     */
public static final Cipher getInstance(String transformation) throws NoSuchAlgorithmException, NoSuchPaddingException {
    List<Transform> transforms = getTransforms(transformation);
    List<ServiceId> cipherServices = new ArrayList<>(transforms.size());
    for (Transform transform : transforms) {
        cipherServices.add(new ServiceId("Cipher", transform.transform));
    }
    List<Service> services = GetInstance.getServices(cipherServices);
    // make sure there is at least one service from a signed provider
    // and that it can use the specified mode and padding
    Iterator<Service> t = services.iterator();
    Exception failure = null;
    while (t.hasNext()) {
        Service s = t.next();
        if (JceSecurity.canUseProvider(s.getProvider()) == false) {
            continue;
        }
        Transform tr = getTransform(s, transforms);
        if (tr == null) {
            // should never happen
            continue;
        }
        int canuse = tr.supportsModePadding(s);
        if (canuse == S_NO) {
            // does not support mode or padding we need, ignore
            continue;
        }
        if (canuse == S_YES) {
            return new Cipher(null, s, t, transformation, transforms);
        } else {
            // S_MAYBE, try out if it works
            try {
                CipherSpi spi = (CipherSpi) s.newInstance(null);
                tr.setModePadding(spi);
                return new Cipher(spi, s, t, transformation, transforms);
            } catch (Exception e) {
                failure = e;
            }
        }
    }
    throw new NoSuchAlgorithmException("Cannot find any provider supporting " + transformation, failure);
}

Example 54 with Service

use of java.security.Provider.Service in project jdk8u_jdk by JetBrains.

the class Cipher method getInstance.

/**
     * Returns a <code>Cipher</code> object that implements the specified
     * transformation.
     *
     * <p> A new Cipher object encapsulating the
     * CipherSpi implementation from the specified Provider
     * object is returned.  Note that the specified Provider object
     * does not have to be registered in the provider list.
     *
     * @param transformation the name of the transformation,
     * e.g., <i>DES/CBC/PKCS5Padding</i>.
     * See the Cipher section in the <a href=
     *   "{@docRoot}/../technotes/guides/security/StandardNames.html#Cipher">
     * Java Cryptography Architecture Standard Algorithm Name Documentation</a>
     * for information about standard transformation names.
     *
     * @param provider the provider.
     *
     * @return a cipher that implements the requested transformation.
     *
     * @exception NoSuchAlgorithmException if <code>transformation</code>
     *          is null, empty, in an invalid format,
     *          or if a CipherSpi implementation for the specified algorithm
     *          is not available from the specified Provider object.
     *
     * @exception NoSuchPaddingException if <code>transformation</code>
     *          contains a padding scheme that is not available.
     *
     * @exception IllegalArgumentException if the <code>provider</code>
     *          is null.
     *
     * @see java.security.Provider
     */
public static final Cipher getInstance(String transformation, Provider provider) throws NoSuchAlgorithmException, NoSuchPaddingException {
    if (provider == null) {
        throw new IllegalArgumentException("Missing provider");
    }
    Exception failure = null;
    List<Transform> transforms = getTransforms(transformation);
    boolean providerChecked = false;
    String paddingError = null;
    for (Transform tr : transforms) {
        Service s = provider.getService("Cipher", tr.transform);
        if (s == null) {
            continue;
        }
        if (providerChecked == false) {
            // for compatibility, first do the lookup and then verify
            // the provider. this makes the difference between a NSAE
            // and a SecurityException if the
            // provider does not support the algorithm.
            Exception ve = JceSecurity.getVerificationResult(provider);
            if (ve != null) {
                String msg = "JCE cannot authenticate the provider " + provider.getName();
                throw new SecurityException(msg, ve);
            }
            providerChecked = true;
        }
        if (tr.supportsMode(s) == S_NO) {
            continue;
        }
        if (tr.supportsPadding(s) == S_NO) {
            paddingError = tr.pad;
            continue;
        }
        try {
            CipherSpi spi = (CipherSpi) s.newInstance(null);
            tr.setModePadding(spi);
            Cipher cipher = new Cipher(spi, transformation);
            cipher.provider = s.getProvider();
            cipher.initCryptoPermission();
            return cipher;
        } catch (Exception e) {
            failure = e;
        }
    }
    // throw NoSuchPaddingException if the problem is with padding
    if (failure instanceof NoSuchPaddingException) {
        throw (NoSuchPaddingException) failure;
    }
    if (paddingError != null) {
        throw new NoSuchPaddingException("Padding not supported: " + paddingError);
    }
    throw new NoSuchAlgorithmException("No such algorithm: " + transformation, failure);
}

Example 55 with Service

use of java.security.Provider.Service in project jdk8u_jdk by JetBrains.

the class Cipher method chooseProvider.

private void chooseProvider(int initType, int opmode, Key key, AlgorithmParameterSpec paramSpec, AlgorithmParameters params, SecureRandom random) throws InvalidKeyException, InvalidAlgorithmParameterException {
    synchronized (lock) {
        if (spi != null) {
            implInit(spi, initType, opmode, key, paramSpec, params, random);
            return;
        }
        Exception lastException = null;
        while ((firstService != null) || serviceIterator.hasNext()) {
            Service s;
            CipherSpi thisSpi;
            if (firstService != null) {
                s = firstService;
                thisSpi = firstSpi;
                firstService = null;
                firstSpi = null;
            } else {
                s = serviceIterator.next();
                thisSpi = null;
            }
            // if provider says it does not support this key, ignore it
            if (s.supportsParameter(key) == false) {
                continue;
            }
            if (JceSecurity.canUseProvider(s.getProvider()) == false) {
                continue;
            }
            Transform tr = getTransform(s, transforms);
            if (tr == null) {
                // should never happen
                continue;
            }
            if (tr.supportsModePadding(s) == S_NO) {
                continue;
            }
            try {
                if (thisSpi == null) {
                    thisSpi = (CipherSpi) s.newInstance(null);
                }
                tr.setModePadding(thisSpi);
                initCryptoPermission();
                implInit(thisSpi, initType, opmode, key, paramSpec, params, random);
                provider = s.getProvider();
                this.spi = thisSpi;
                firstService = null;
                serviceIterator = null;
                transforms = null;
                return;
            } catch (Exception e) {
                // SecurityException from crypto permission check
                if (lastException == null) {
                    lastException = e;
                }
            }
        }
        // no working provider found, fail
        if (lastException instanceof InvalidKeyException) {
            throw (InvalidKeyException) lastException;
        }
        if (lastException instanceof InvalidAlgorithmParameterException) {
            throw (InvalidAlgorithmParameterException) lastException;
        }
        if (lastException instanceof RuntimeException) {
            throw (RuntimeException) lastException;
        }
        String kName = (key != null) ? key.getClass().getName() : "(null)";
        throw new InvalidKeyException("No installed provider supports this key: " + kName, lastException);
    }
}