Class PKCS8EncodedKeySpec

All Implemented Interfaces:
KeySpec
public class PKCS8EncodedKeySpec
extends EncodedKeySpec

This class represents the ASN.1 encoding of a private key, encoded according to the ASN.1 type PrivateKeyInfo. The PrivateKeyInfo syntax is defined in the PKCS#8 standard as follows: 

PrivateKeyInfo ::= SEQUENCE {
   version Version,
   privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
   privateKey PrivateKey,
   attributes [0] IMPLICIT Attributes OPTIONAL }

 Version ::= INTEGER

 PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier

 PrivateKey ::= OCTET STRING

 Attributes ::= SET OF Attribute

Since:
1.2
See Also:
Key, KeyFactory, KeySpec, EncodedKeySpec, X509EncodedKeySpec

Constructors

Constructor Description
PKCS8EncodedKeySpec​(byte[] encodedKey)

Creates a new PKCS8EncodedKeySpec with the given encoded key.
PKCS8EncodedKeySpec​(byte[] encodedKey, String algorithm)

Creates a new PKCS8EncodedKeySpec with the given encoded key and algorithm.

Methods

Modifier and Type Method Description
byte[] getEncoded()

Returns the key bytes, encoded according to the PKCS #8 standard.
String getFormat()

Returns the name of the encoding format associated with this key specification.

Methods declared in class java.security.spec.EncodedKeySpec

getAlgorithm

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructors

PKCS8EncodedKeySpec

public PKCS8EncodedKeySpec(byte[] encodedKey)

Creates a new PKCS8EncodedKeySpec with the given encoded key.

Parameters:
encodedKey - the key, which is assumed to be encoded according to the PKCS #8 standard. The contents of the array are copied to protect against subsequent modification.
Throws:
NullPointerException - if encodedKey is null.

PKCS8EncodedKeySpec

public PKCS8EncodedKeySpec(byte[] encodedKey,
                           String algorithm)

Creates a new PKCS8EncodedKeySpec with the given encoded key and algorithm. This constructor is useful when subsequent callers of the PKCS8EncodedKeySpec object might not know the algorithm of the private key.

Parameters:
encodedKey - the key, which is assumed to be encoded according to the PKCS #8 standard. The contents of the array are copied to protect against subsequent modification.
algorithm - the algorithm name of the encoded private 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

Methods

getEncoded

public byte[] getEncoded()

Returns the key bytes, encoded according to the PKCS #8 standard.

Overrides:
getEncoded in class EncodedKeySpec
Returns:
the PKCS #8 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 "PKCS#8".

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https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/security/spec/PKCS8EncodedKeySpec.html