javax/crypto/KeyGenerator.java

48  * <p>There are two ways to generate a key: in an algorithm-independent
49  * manner, and in an algorithm-specific manner.
67  * algorithm-independent {@code init} methods, it is up to the
68  * provider what to do about the algorithm-specific parameters (if any) to be
72  * <p>For situations where a set of algorithm-specific parameters already
138     // The algorithm
139     private final String algorithm;
155      * @param algorithm the algorithm
158                            String algorithm) {
161         this.algorithm = algorithm;
164             pdebug.println("KeyGenerator." + algorithm + " algorithm from: " +
169     private KeyGenerator(String algorithm) throws NoSuchAlgorithmException {
170         this.algorithm = algorithm;
172                 GetInstance.getServices("KeyGenerator", algorithm);
178                 (algorithm + " KeyGenerator not available");
182             pdebug.println("KeyGenerator." + algorithm + " algorithm from: " +
192      * Returns the algorithm name of this {@code KeyGenerator} object.
198      * @return the algorithm name of this {@code KeyGenerator} object.
201         return this.algorithm;
206      * for the specified algorithm.
212      * Provider that supports the specified algorithm is returned.
221      * the preferred provider order for the specified algorithm. This
225      * @param algorithm the standard name of the requested key algorithm.
229      * for information about standard algorithm names.
235      *         specified algorithm
237      * @throws NullPointerException if {@code algorithm} is {@code null}
241     public static final KeyGenerator getInstance(String algorithm)
243         Objects.requireNonNull(algorithm, "null algorithm name");
244         return new KeyGenerator(algorithm);
249      * for the specified algorithm.
259      * @param algorithm the standard name of the requested key algorithm.
263      * for information about standard algorithm names.
273      *         implementation for the specified algorithm is not
279      * @throws NullPointerException if {@code algorithm} is {@code null}
283     public static final KeyGenerator getInstance(String algorithm,
286         Objects.requireNonNull(algorithm, "null algorithm name");
288                 KeyGeneratorSpi.class, algorithm, provider);
290                 instance.provider, algorithm);
295      * for the specified algorithm.
302      * @param algorithm the standard name of the requested key algorithm.
306      * for information about standard algorithm names.
316      *         implementation for the specified algorithm is not available
319      * @throws NullPointerException if {@code algorithm} is {@code null}
323     public static final KeyGenerator getInstance(String algorithm,
325         Objects.requireNonNull(algorithm, "null algorithm name");
327                 KeyGeneratorSpi.class, algorithm, provider);
329                 instance.provider, algorithm);
510      * @param keysize the keysize. This is an algorithm-specific metric,
524      * @param keysize the keysize. This is an algorithm-specific metric,