java/security/SecureRandom.java

55  * bits generator or DRBG), which means they use a deterministic algorithm
72  * specific algorithm supporting the specific instantiate parameters. The
181      * The algorithm name of null if unknown.
186     private String algorithm;
193      * default random number algorithm.
199      * Provider that supports a {@code SecureRandom} (RNG) algorithm is returned.
200      * If none of the Providers support a RNG algorithm,
209      * for information about standard RNG algorithm names.
223         if (provider == null || algorithm == null) {
227                     "SecureRandom." + algorithm + " ThreadSafe", "false"));
233      * default random number algorithm.
240      * Provider that supports a {@code SecureRandom} (RNG) algorithm is returned.
241      * If none of the Providers support a RNG algorithm,
250      * for information about standard RNG algorithm names.
279                 // never happens, because we made sure the algorithm exists
287         // algorithm value as it would be inaccurate.
289             this.algorithm = prng;
305             String algorithm) {
309         this.algorithm = algorithm;
313             pdebug.println("SecureRandom." + algorithm +
314                 " algorithm from: " + getProviderName());
324      * Random Number Generator (RNG) algorithm.
330      * Provider that supports the specified algorithm is returned.
339      * the preferred provider order for the specified algorithm. This
343      * @param algorithm the name of the RNG algorithm.
347      * for information about standard RNG algorithm names.
353      *         specified algorithm
355      * @throws NullPointerException if {@code algorithm} is {@code null}
361     public static SecureRandom getInstance(String algorithm)
363         Objects.requireNonNull(algorithm, "null algorithm name");
365                 SecureRandomSpi.class, algorithm);
367                 instance.provider, algorithm);
372      * Random Number Generator (RNG) algorithm.
382      * @param algorithm the name of the RNG algorithm.
386      * for information about standard RNG algorithm names.
396      *         implementation for the specified algorithm is not
402      * @throws NullPointerException if {@code algorithm} is {@code null}
408     public static SecureRandom getInstance(String algorithm, String provider)
410         Objects.requireNonNull(algorithm, "null algorithm name");
412             SecureRandomSpi.class, algorithm, provider);
414             instance.provider, algorithm);
419      * Random Number Generator (RNG) algorithm.
426      * @param algorithm the name of the RNG algorithm.
430      * for information about standard RNG algorithm names.
440      *         implementation for the specified algorithm is not available
443      * @throws NullPointerException if {@code algorithm} is {@code null}
449     public static SecureRandom getInstance(String algorithm,
451         Objects.requireNonNull(algorithm, "null algorithm name");
453             SecureRandomSpi.class, algorithm, provider);
455             instance.provider, algorithm);
460      * Random Number Generator (RNG) algorithm and supports the specified
467      * Provider that supports the specified algorithm and the specified
476      * the preferred provider order for the specified algorithm. This
480      * @param algorithm the name of the RNG algorithm.
484      * for information about standard RNG algorithm names.
496      *         algorithm and parameters
498      * @throws NullPointerException if {@code algorithm} is {@code null}
505             String algorithm, SecureRandomParameters params)
507         Objects.requireNonNull(algorithm, "null algorithm name");
512                 SecureRandomSpi.class, algorithm, params);
514                 instance.provider, algorithm);
519      * Random Number Generator (RNG) algorithm and supports the specified
530      * @param algorithm the name of the RNG algorithm.
534      * for information about standard RNG algorithm names.
548      *         specified algorithm and parameters
553      * @throws NullPointerException if {@code algorithm} is {@code null}
559     public static SecureRandom getInstance(String algorithm,
562         Objects.requireNonNull(algorithm, "null algorithm name");
567                 SecureRandomSpi.class, algorithm, params, provider);
569                 instance.provider, algorithm);
574      * Random Number Generator (RNG) algorithm and supports the specified
583      * @param algorithm the name of the RNG algorithm.
587      * for information about standard RNG algorithm names.
601      *         specified algorithm and parameters
603      * @throws NullPointerException if {@code algorithm} is {@code null}
609     public static SecureRandom getInstance(String algorithm,
612         Objects.requireNonNull(algorithm, "null algorithm name");
617                 SecureRandomSpi.class, algorithm, params, provider);
619                 instance.provider, algorithm);
639      * Returns the name of the algorithm implemented by this
642      * @return the name of the algorithm or {@code unknown}
643      *          if the algorithm name cannot be determined.
647         return Objects.toString(algorithm, "unknown");
808      * generation algorithm that this class uses to seed itself.  This
835      * generation algorithm that this class uses to seed itself.  This
871      * Gets a default PRNG algorithm by looking through all registered
872      * providers. Returns the first PRNG algorithm of the first provider that
927      * @throws NoSuchAlgorithmException if no algorithm is available