X509EncodedKeySpec (Java SE 9 & JDK 9 ) (original) (raw)

• java.lang.Object

• • java.security.spec.EncodedKeySpec
  • • java.security.spec.X509EncodedKeySpec

• All Implemented Interfaces:
  [KeySpec](../../../java/security/spec/KeySpec.html "interface in java.security.spec")

public class X509EncodedKeySpec
extends EncodedKeySpec
This class represents the ASN.1 encoding of a public key, encoded according to the ASN.1 type SubjectPublicKeyInfo. The SubjectPublicKeyInfo syntax is defined in the X.509 standard as follows:
SubjectPublicKeyInfo ::= SEQUENCE {
algorithm AlgorithmIdentifier,
subjectPublicKey BIT STRING }

Since:
1.2
See Also:
Key, KeyFactory, KeySpec, EncodedKeySpec, PKCS8EncodedKeySpec

• • Constructor Summary

  Constructors

  Constructor	Description
  X509EncodedKeySpec​(byte[] encodedKey)	Creates a new X509EncodedKeySpec with the given encoded key.
  X509EncodedKeySpec​(byte[] encodedKey,String algorithm)	Creates a new X509EncodedKeySpec with the given encoded key.

  • Method Summary

  All Methods Instance Methods Concrete Methods

  Modifier and Type	Method	Description
  byte[]	getEncoded​()	Returns the key bytes, encoded according to the X.509 standard.
  String	getFormat​()	Returns the name of the encoding format associated with this key specification.

     * ### Methods inherited from class java.security.spec.[EncodedKeySpec](../../../java/security/spec/EncodedKeySpec.html "class in java.security.spec")  
     `[getAlgorithm](../../../java/security/spec/EncodedKeySpec.html#getAlgorithm--)`  
     * ### Methods inherited from class java.lang.[Object](../../../java/lang/Object.html "class in java.lang")  
     `[clone](../../../java/lang/Object.html#clone--), [equals](../../../java/lang/Object.html#equals-java.lang.Object-), [finalize](../../../java/lang/Object.html#finalize--), [getClass](../../../java/lang/Object.html#getClass--), [hashCode](../../../java/lang/Object.html#hashCode--), [notify](../../../java/lang/Object.html#notify--), [notifyAll](../../../java/lang/Object.html#notifyAll--), [toString](../../../java/lang/Object.html#toString--), [wait](../../../java/lang/Object.html#wait--), [wait](../../../java/lang/Object.html#wait-long-), [wait](../../../java/lang/Object.html#wait-long-int-)`

• • Constructor Detail

     * #### X509EncodedKeySpec  
     public X509EncodedKeySpec​(byte[] encodedKey)  
     Creates a new `X509EncodedKeySpec` with the given encoded key.  
     Parameters:  
     `encodedKey` \- the key, which is assumed to be encoded according to the X.509 standard. The contents of the array are copied to protect against subsequent modification.  
     Throws:  
     `[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if `encodedKey` is null.  
     * #### X509EncodedKeySpec  
     public X509EncodedKeySpec​(byte[] encodedKey,  
                               [String](../../../java/lang/String.html "class in java.lang") algorithm)  
     Creates a new `X509EncodedKeySpec` with the given encoded key. This constructor is useful when subsequent callers of the`X509EncodedKeySpec` object might not know the algorithm of the key.  
     Parameters:  
     `encodedKey` \- the key, which is assumed to be encoded according to the X.509 standard. The contents of the array are copied to protect against subsequent modification.  
     `algorithm` \- the algorithm name of the encoded public key See the KeyFactory section in the [ Java Security Standard Algorithm Names Specification](../../../../specs/security/standard-names.html#keyfactory-algorithms) for information about standard algorithm names.  
     Throws:  
     `[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang")` \- if `encodedKey` or `algorithm` is null.  
     `[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if `algorithm` is the empty string `""`  
     Since:  
     9  

  • Method Detail

    * #### getEncoded  
    public byte[] getEncoded​()  
    Returns the key bytes, encoded according to the X.509 standard.  
    Overrides:  
    `[getEncoded](../../../java/security/spec/EncodedKeySpec.html#getEncoded--)` in class `[EncodedKeySpec](../../../java/security/spec/EncodedKeySpec.html "class in java.security.spec")`  
    Returns:  
    the X.509 encoding of the key. Returns a new array each time this method is called.  
    * #### getFormat  
    public final [String](../../../java/lang/String.html "class in java.lang") getFormat​()  
    Returns the name of the encoding format associated with this key specification.  
    Specified by:  
    `[getFormat](../../../java/security/spec/EncodedKeySpec.html#getFormat--)` in class `[EncodedKeySpec](../../../java/security/spec/EncodedKeySpec.html "class in java.security.spec")`  
    Returns:  
    the string `"X.509"`.

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