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

Example 36 with Service

use of java.security.Provider.Service in project j2objc by google.

the class Cipher method tryCombinations.

/**
 * Tries to find the correct {@code Cipher} transform to use. Returns a
 * {@link org.apache.harmony.security.fortress.Engine.SpiAndProvider}, throws the first exception that was
 * encountered during attempted initialization, or {@code null} if there are
 * no providers that support the {@code initParams}.
 * <p>
 * {@code tokenizedTransformation} must be in the format returned by
 * {@link Cipher#checkTransformation(String)}. The combinations of mode strings
 * tried are as follows:
 * <ul>
 * <li><code>[cipher]/[mode]/[padding]</code>
 * <li><code>[cipher]/[mode]</code>
 * <li><code>[cipher]//[padding]</code>
 * <li><code>[cipher]</code>
 * </ul>
 * {@code services} is a list of cipher services. Needs to be non-null only if
 * {@code provider != null}
 */
static CipherSpiAndProvider tryCombinations(InitParams initParams, Provider provider, String[] tokenizedTransformation) throws InvalidKeyException, InvalidAlgorithmParameterException {
    // Enumerate all the transforms we need to try
    ArrayList<Transform> transforms = new ArrayList<Transform>();
    if (tokenizedTransformation[1] != null && tokenizedTransformation[2] != null) {
        transforms.add(new Transform(tokenizedTransformation[0] + "/" + tokenizedTransformation[1] + "/" + tokenizedTransformation[2], NeedToSet.NONE));
    }
    if (tokenizedTransformation[1] != null) {
        transforms.add(new Transform(tokenizedTransformation[0] + "/" + tokenizedTransformation[1], NeedToSet.PADDING));
    }
    if (tokenizedTransformation[2] != null) {
        transforms.add(new Transform(tokenizedTransformation[0] + "//" + tokenizedTransformation[2], NeedToSet.MODE));
    }
    transforms.add(new Transform(tokenizedTransformation[0], NeedToSet.BOTH));
    // Try each of the transforms and keep track of the first exception
    // encountered.
    Exception cause = null;
    if (provider != null) {
        for (Transform transform : transforms) {
            Provider.Service service = provider.getService("Cipher", transform.name);
            if (service == null) {
                continue;
            }
            return tryTransformWithProvider(initParams, tokenizedTransformation, transform.needToSet, service);
        }
    } else {
        for (Provider prov : Security.getProviders()) {
            for (Transform transform : transforms) {
                Provider.Service service = prov.getService("Cipher", transform.name);
                if (service == null) {
                    continue;
                }
                if (initParams == null || initParams.key == null || service.supportsParameter(initParams.key)) {
                    try {
                        CipherSpiAndProvider sap = tryTransformWithProvider(initParams, tokenizedTransformation, transform.needToSet, service);
                        if (sap != null) {
                            return sap;
                        }
                    } catch (Exception e) {
                        if (cause == null) {
                            cause = e;
                        }
                    }
                }
            }
        }
    }
    if (cause instanceof InvalidKeyException) {
        throw (InvalidKeyException) cause;
    } else if (cause instanceof InvalidAlgorithmParameterException) {
        throw (InvalidAlgorithmParameterException) cause;
    } else if (cause instanceof RuntimeException) {
        throw (RuntimeException) cause;
    } else if (cause != null) {
        throw new InvalidKeyException("No provider can be initialized with given key", cause);
    } else if (initParams == null || initParams.key == null) {
        return null;
    } else {
        // and it is an InvalidKeyException.
        throw new InvalidKeyException("No provider offers " + Arrays.toString(tokenizedTransformation) + " for " + initParams.key.getAlgorithm() + " key of class " + initParams.key.getClass().getName() + " and export format " + initParams.key.getFormat());
    }
}

Example 37 with Service

use of java.security.Provider.Service in project j2objc by google.

the class JceSecurity method getInstance.

static Instance getInstance(String type, Class<?> clazz, String algorithm) throws NoSuchAlgorithmException {
    List<Service> services = GetInstance.getServices(type, algorithm);
    NoSuchAlgorithmException failure = null;
    for (Service s : services) {
        if (canUseProvider(s.getProvider()) == false) {
            // allow only signed providers
            continue;
        }
        try {
            Instance instance = GetInstance.getInstance(s, clazz);
            return instance;
        } catch (NoSuchAlgorithmException e) {
            failure = e;
        }
    }
    throw new NoSuchAlgorithmException("Algorithm " + algorithm + " not available", failure);
}

Example 38 with Service

use of java.security.Provider.Service in project j2objc by google.

the class SecretKeyFactory method nextSpi.

/**
 * Update the active spi of this class and return the next
 * implementation for failover. If no more implemenations are
 * available, this method returns null. However, the active spi of
 * this class is never set to null.
 */
private SecretKeyFactorySpi nextSpi(SecretKeyFactorySpi oldSpi) {
    synchronized (lock) {
        // try that spi now
        if ((oldSpi != null) && (oldSpi != spi)) {
            return spi;
        }
        if (serviceIterator == null) {
            return null;
        }
        while (serviceIterator.hasNext()) {
            Service s = serviceIterator.next();
            if (JceSecurity.canUseProvider(s.getProvider()) == false) {
                continue;
            }
            try {
                Object obj = s.newInstance(null);
                if (obj instanceof SecretKeyFactorySpi == false) {
                    continue;
                }
                SecretKeyFactorySpi spi = (SecretKeyFactorySpi) obj;
                provider = s.getProvider();
                this.spi = spi;
                return spi;
            } catch (NoSuchAlgorithmException e) {
            // ignore
            }
        }
        serviceIterator = null;
        return null;
    }
}

Example 39 with Service

use of java.security.Provider.Service in project j2objc by google.

the class KeyAgreement method getInstance.

/**
 * Returns a <code>KeyAgreement</code> object that implements the
 * specified key agreement algorithm.
 *
 * <p> This method traverses the list of registered security Providers,
 * starting with the most preferred Provider.
 * A new KeyAgreement object encapsulating the
 * KeyAgreementSpi 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 algorithm the standard name of the requested key agreement
 * algorithm.
 * See the KeyAgreement section in the <a href=
 * "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyAgreement">
 * Java Cryptography Architecture Standard Algorithm Name Documentation</a>
 * for information about standard algorithm names.
 *
 * @return the new <code>KeyAgreement</code> object.
 *
 * @exception NullPointerException if the specified algorithm
 *          is null.
 *
 * @exception NoSuchAlgorithmException if no Provider supports a
 *          KeyAgreementSpi implementation for the
 *          specified algorithm.
 *
 * @see java.security.Provider
 */
public static final KeyAgreement getInstance(String algorithm) throws NoSuchAlgorithmException {
    List<Service> services = GetInstance.getServices("KeyAgreement", algorithm);
    // make sure there is at least one service from a signed provider
    Iterator<Service> t = services.iterator();
    while (t.hasNext()) {
        Service s = t.next();
        if (JceSecurity.canUseProvider(s.getProvider()) == false) {
            continue;
        }
        // return new KeyAgreement(s, t, algorithm);
        return new KeyAgreement(algorithm);
    }
    throw new NoSuchAlgorithmException("Algorithm " + algorithm + " not available");
}

Example 40 with Service

use of java.security.Provider.Service in project j2objc by google.

the class KeyGenerator method nextSpi.

/**
 * Update the active spi of this class and return the next
 * implementation for failover. If no more implemenations are
 * available, this method returns null. However, the active spi of
 * this class is never set to null.
 */
private KeyGeneratorSpi nextSpi(KeyGeneratorSpi oldSpi, boolean reinit) {
    synchronized (lock) {
        // try that spi now
        if ((oldSpi != null) && (oldSpi != spi)) {
            return spi;
        }
        if (serviceIterator == null) {
            return null;
        }
        while (serviceIterator.hasNext()) {
            Service s = serviceIterator.next();
            if (JceSecurity.canUseProvider(s.getProvider()) == false) {
                continue;
            }
            try {
                Object inst = s.newInstance(null);
                // ignore non-spis
                if (inst instanceof KeyGeneratorSpi == false) {
                    continue;
                }
                KeyGeneratorSpi spi = (KeyGeneratorSpi) inst;
                if (reinit) {
                    if (initType == I_SIZE) {
                        spi.engineInit(initKeySize, initRandom);
                    } else if (initType == I_PARAMS) {
                        spi.engineInit(initParams, initRandom);
                    } else if (initType == I_RANDOM) {
                        spi.engineInit(initRandom);
                    } else if (initType != I_NONE) {
                        throw new AssertionError("KeyGenerator initType: " + initType);
                    }
                }
                provider = s.getProvider();
                this.spi = spi;
                return spi;
            } catch (Exception e) {
            // ignore
            }
        }
        disableFailover();
        return null;
    }
}