コード例 #1
0
  /**
   * Returns a Set of Strings containing the names of all available algorithms or types for the
   * specified Java cryptographic service (e.g., Signature, MessageDigest, Cipher, Mac, KeyStore).
   * Returns an empty Set if there is no provider that supports the specified service or if
   * serviceName is null. For a complete list of Java cryptographic services, please see the <a
   * href="../../../guide/security/CryptoSpec.html">Java Cryptography Architecture API Specification
   * &amp; Reference</a>. Note: the returned set is immutable.
   *
   * @param serviceName the name of the Java cryptographic service (e.g., Signature, MessageDigest,
   *     Cipher, Mac, KeyStore). Note: this parameter is case-insensitive.
   * @return a Set of Strings containing the names of all available algorithms or types for the
   *     specified Java cryptographic service or an empty set if no provider supports the specified
   *     service.
   * @since 1.4
   */
  public static Set<String> getAlgorithms(String serviceName) {

    if ((serviceName == null) || (serviceName.length() == 0) || (serviceName.endsWith("."))) {
      return Collections.EMPTY_SET;
    }

    HashSet result = new HashSet();
    Provider[] providers = Security.getProviders();

    for (int i = 0; i < providers.length; i++) {
      // Check the keys for each provider.
      for (Enumeration e = providers[i].keys(); e.hasMoreElements(); ) {
        String currentKey = ((String) e.nextElement()).toUpperCase();
        if (currentKey.startsWith(serviceName.toUpperCase())) {
          // We should skip the currentKey if it contains a
          // whitespace. The reason is: such an entry in the
          // provider property contains attributes for the
          // implementation of an algorithm. We are only interested
          // in entries which lead to the implementation
          // classes.
          if (currentKey.indexOf(" ") < 0) {
            result.add(currentKey.substring(serviceName.length() + 1));
          }
        }
      }
    }
    return Collections.unmodifiableSet(result);
  }
コード例 #2
0
  /**
   * Returns an array containing all installed providers that satisfy the specified* selection
   * criteria, or null if no such providers have been installed. The returned providers are ordered
   * according to their <a href= "#insertProviderAt(java.security.Provider, int)">preference
   * order</a>.
   *
   * <p>The selection criteria are represented by a map. Each map entry represents a selection
   * criterion. A provider is selected iff it satisfies all selection criteria. The key for any
   * entry in such a map must be in one of the following two formats:
   *
   * <ul>
   *   <li><i>&lt;crypto_service>.&lt;algorithm_or_type></i>
   *       <p>The cryptographic service name must not contain any dots.
   *       <p>The value associated with the key must be an empty string.
   *       <p>A provider satisfies this selection criterion iff the provider implements the
   *       specified algorithm or type for the specified cryptographic service.
   *   <li><i>&lt;crypto_service>.&lt;algorithm_or_type> &lt;attribute_name></i>
   *       <p>The cryptographic service name must not contain any dots. There must be one or more
   *       space charaters between the <i>&lt;algorithm_or_type></i> and the
   *       <i>&lt;attribute_name></i>.
   *       <p>The value associated with the key must be a non-empty string. A provider satisfies
   *       this selection criterion iff the provider implements the specified algorithm or type for
   *       the specified cryptographic service and its implementation meets the constraint expressed
   *       by the specified attribute name/value pair.
   * </ul>
   *
   * <p>See Appendix A in the <a href= "../../../guide/security/CryptoSpec.html#AppA"> Java
   * Cryptogaphy Architecture API Specification &amp; Reference </a> for information about standard
   * cryptographic service names, standard algorithm names and standard attribute names.
   *
   * @param filter the criteria for selecting providers. The filter is case-insensitive.
   * @return all the installed providers that satisfy the selection criteria, or null if no such
   *     providers have been installed.
   * @throws InvalidParameterException if the filter is not in the required format
   * @throws NullPointerException if filter is null
   * @see #getProviders(java.lang.String)
   */
  public static Provider[] getProviders(Map<String, String> filter) {
    // Get all installed providers first.
    // Then only return those providers who satisfy the selection criteria.
    Provider[] allProviders = Security.getProviders();
    Set keySet = filter.keySet();
    LinkedHashSet candidates = new LinkedHashSet(5);

    // Returns all installed providers
    // if the selection criteria is null.
    if ((keySet == null) || (allProviders == null)) {
      return allProviders;
    }

    boolean firstSearch = true;

    // For each selection criterion, remove providers
    // which don't satisfy the criterion from the candidate set.
    for (Iterator ite = keySet.iterator(); ite.hasNext(); ) {
      String key = (String) ite.next();
      String value = (String) filter.get(key);

      LinkedHashSet newCandidates = getAllQualifyingCandidates(key, value, allProviders);
      if (firstSearch) {
        candidates = newCandidates;
        firstSearch = false;
      }

      if ((newCandidates != null) && !newCandidates.isEmpty()) {
        // For each provider in the candidates set, if it
        // isn't in the newCandidate set, we should remove
        // it from the candidate set.
        for (Iterator cansIte = candidates.iterator(); cansIte.hasNext(); ) {
          Provider prov = (Provider) cansIte.next();
          if (!newCandidates.contains(prov)) {
            cansIte.remove();
          }
        }
      } else {
        candidates = null;
        break;
      }
    }

    if ((candidates == null) || (candidates.isEmpty())) return null;

    Object[] candidatesArray = candidates.toArray();
    Provider[] result = new Provider[candidatesArray.length];

    for (int i = 0; i < result.length; i++) {
      result[i] = (Provider) candidatesArray[i];
    }

    return result;
  }
コード例 #3
0
  public static void testDefault(PKCS11Test test) throws Exception {
    // run test for default configured PKCS11 providers (if any)

    if ("true".equals(System.getProperty("NO_DEFAULT"))) {
      return;
    }

    Provider[] providers = Security.getProviders();
    for (int i = 0; i < providers.length; i++) {
      Provider p = providers[i];
      if (p.getName().startsWith("SunPKCS11-")) {
        test.premain(p);
      }
    }
  }