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25 package java.security.spec;
26 
27 import java.util.Objects;
28 
29 /**
30  * This class is used to specify any algorithm parameters that are determined
31  * by a standard name. This class also holds constants for standard parameter
32  * set names. The names of these constants exactly match the corresponding
33  * parameter set name. For example, NamedParameterSpec.X25519 represents the
34  * parameter set identified by the string "X25519". These strings are defined
35  * in the <a href=
36  * "{@docRoot}/../specs/security/standard-names.html#parameterspec-names">
37  *          Java Security Standard Algorithm Names Specification</a>.
38  *
39  * @since 11
40  *
41  */
42 public class NamedParameterSpec implements AlgorithmParameterSpec {
43 
44    /**
45     * The X25519 parameters
46     */
47     public static final NamedParameterSpec X25519
48         = new NamedParameterSpec("X25519");
49    /**
50     * The X448 parameters
51     */
52     public static final NamedParameterSpec X448
53         = new NamedParameterSpec("X448");
54 
55     /**
56      * The Ed25519 parameters
57      *
58      * @since 15
59      */
60     public static final NamedParameterSpec ED25519
61         = new NamedParameterSpec("Ed25519");
62 
63     /**
64      * The Ed448 parameters
65      *
66      * @since 15
67      */
68     public static final NamedParameterSpec ED448
69         = new NamedParameterSpec("Ed448");
70 
71     private String name;
72 
73     /**
74      * Creates a parameter specification using a standard (or predefined)
75      * name {@code stdName}. For the
76      * list of supported names, please consult the documentation
77      * of the provider whose implementation will be used.
78      *
79      * @param stdName the standard name of the algorithm parameters. See the
80      *        ParameterSpec Names section in the
81      *        <a href=
82      *        "{@docRoot}/../specs/security/standard-names.html#parameterspec-names">
83      *        Java Security Standard Algorithm Names Specification</a> for
84      *        information about standard names.
85      *
86      * @throws NullPointerException if {@code stdName} is null.
87      */
NamedParameterSpec(String stdName)88     public NamedParameterSpec(String stdName) {
89         Objects.requireNonNull(stdName, "stdName must not be null");
90 
91         this.name = stdName;
92     }
93 
94     /**
95      * Returns the standard name that determines the algorithm parameters.
96      * @return the standard name.
97      */
getName()98     public String getName() {
99         return name;
100     }
101 }
102