Module java.base
Package java.security.spec

Class X509EncodedKeySpec

java.lang.Object
java.security.spec.EncodedKeySpec
java.security.spec.X509EncodedKeySpec
All Implemented Interfaces:
KeySpec
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 Details

    • 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 - if encodedKey is null.

    • X509EncodedKeySpec

      public X509EncodedKeySpec​(byte[] encodedKey, String 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 for information about standard algorithm names.
      Throws:
      NullPointerException - if encodedKey or algorithm is null.
      IllegalArgumentException - if algorithm is the empty string ""
      Since:
      9

  • Method Details

    • getEncoded

      public byte[] getEncoded()
      Returns the key bytes, encoded according to the X.509 standard.
      Overrides:
      getEncoded in class EncodedKeySpec
      Returns:
      the X.509 encoding of the key. Returns a new array each time this method is called.

    • getFormat

      public final String getFormat()
      Returns the name of the encoding format associated with this key specification.
      Specified by:
      getFormat in class EncodedKeySpec
      Returns:
      the string "X.509".