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package java.security.spec;


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



Author:Jan Luehe
See Also:
Since:1.2
/**
 * This class represents the ASN.1 encoding of a private key,
 * encoded according to the ASN.1 type {@code PrivateKeyInfo}.
 * The {@code PrivateKeyInfo} syntax is defined in the PKCS#8 standard
 * as follows:
 *
 * <pre>
 * PrivateKeyInfo ::= SEQUENCE {
 *   version Version,
 *   privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
 *   privateKey PrivateKey,
 *   attributes [0] IMPLICIT Attributes OPTIONAL }
 *
 * Version ::= INTEGER
 *
 * PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
 *
 * PrivateKey ::= OCTET STRING
 *
 * Attributes ::= SET OF Attribute
 * </pre>
 *
 * @author Jan Luehe
 *
 *
 * @see java.security.Key
 * @see java.security.KeyFactory
 * @see KeySpec
 * @see EncodedKeySpec
 * @see X509EncodedKeySpec
 *
 * @since 1.2
 */

public class PKCS8EncodedKeySpec extends EncodedKeySpec {

    
Creates a new PKCS8EncodedKeySpec with the given encoded key. 
Params:
  • 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:
/**
     * Creates a new {@code PKCS8EncodedKeySpec} with the given encoded key.
     *
     * @param 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 {@code encodedKey}
     * is null.
     */
    public PKCS8EncodedKeySpec(byte[] encodedKey) {
        super(encodedKey);
    }

    
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. 
Params:
  • 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:
Since:9
/**
     * Creates a new {@code PKCS8EncodedKeySpec} with the given encoded key and
     * algorithm. This constructor is useful when subsequent callers of
     * the {@code PKCS8EncodedKeySpec} object might not know the
     * algorithm of the private key.
     *
     * @param 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.
     * @param algorithm the algorithm name of the encoded private key
     * See the KeyFactory section in the <a href=
     * "{@docRoot}/../specs/security/standard-names.html#keyfactory-algorithms">
     * Java Security Standard Algorithm Names Specification</a>
     * for information about standard algorithm names.
     * @throws NullPointerException if {@code encodedKey}
     * or {@code algorithm} is null.
     * @throws IllegalArgumentException if {@code algorithm} is
     * the empty string {@code ""}
     * @since 9
     */
    public PKCS8EncodedKeySpec(byte[] encodedKey, String algorithm) {
        super(encodedKey, algorithm);
    }

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

Returns:the PKCS #8 encoding of the key. Returns a new array
each time this method is called.
/**
     * Returns the key bytes, encoded according to the PKCS #8 standard.
     *
     * @return the PKCS #8 encoding of the key. Returns a new array
     * each time this method is called.
     */
    public byte[] getEncoded() {
        return super.getEncoded();
    }

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

Returns:the string "PKCS#8".
/**
     * Returns the name of the encoding format associated with this
     * key specification.
     *
     * @return the string {@code "PKCS#8"}.
     */
    public final String getFormat() {
        return "PKCS#8";
    }
}