java.security.cert

Class Certificate

java.lang.Object

java.security.cert.Certificate

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

X509Certificate

public abstract class Certificate
extends Object
implements Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Certificate(String type) Creates a certificate of the specified type.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) Compares this certificate for equality with the specified object.
abstract byte[]	getEncoded() Returns the encoded form of this certificate.
abstract PublicKey	getPublicKey() Gets the public key from this certificate.
String	getType() Returns the type of this certificate.
int	hashCode() Returns a hashcode value for this certificate from its encoded form.
abstract String	toString() Returns a string representation of this certificate.
abstract void	verify(PublicKey key) Verifies that this certificate was signed using the private key that corresponds to the specified public key.
abstract void	verify(PublicKey key, String sigProvider) Verifies that this certificate was signed using the private key that corresponds to the specified public key.

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Certificate

protected Certificate(String type)

Creates a certificate of the specified type.

Parameters:

type - the standard name of the certificate type. See the CertificateFactory section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard certificate types.

Method Detail

getType

public final String getType()

Returns the type of this certificate.

Returns:

the type of this certificate.

equals

public boolean equals(@Nullable
                      Object other)

Compares this certificate for equality with the specified object. If the other object is an instanceof Certificate, then its encoded form is retrieved and compared with the encoded form of this certificate.

Overrides:

equals in class Object

Parameters:

other - the object to test for equality with this certificate.

Returns:

true iff the encoded forms of the two certificates match, false otherwise.

See Also:

Object.hashCode(), HashMap

hashCode

public int hashCode()

Returns a hashcode value for this certificate from its encoded form.

Overrides:

hashCode in class Object

Returns:

the hashcode value.

See Also:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

getEncoded

public abstract byte[] getEncoded()
                           throws CertificateEncodingException

Returns the encoded form of this certificate. It is assumed that each certificate type would have only a single form of encoding; for example, X.509 certificates would be encoded as ASN.1 DER.

Returns:

the encoded form of this certificate

Throws:

CertificateEncodingException - if an encoding error occurs.

verify

public abstract void verify(PublicKey key)
                     throws CertificateException,
                            NoSuchAlgorithmException,
                            InvalidKeyException,
                            NoSuchProviderException,
                            SignatureException

Verifies that this certificate was signed using the private key that corresponds to the specified public key.

Parameters:

key - the PublicKey used to carry out the verification.

Throws:

NoSuchAlgorithmException - on unsupported signature algorithms.

InvalidKeyException - on incorrect key.

NoSuchProviderException - if there's no default provider.

SignatureException - on signature errors.

CertificateException - on encoding errors.

verify

public abstract void verify(PublicKey key,
                            String sigProvider)
                     throws CertificateException,
                            NoSuchAlgorithmException,
                            InvalidKeyException,
                            NoSuchProviderException,
                            SignatureException

Verifies that this certificate was signed using the private key that corresponds to the specified public key. This method uses the signature verification engine supplied by the specified provider.

Parameters:

key - the PublicKey used to carry out the verification.

sigProvider - the name of the signature provider.

Throws:

NoSuchAlgorithmException - on unsupported signature algorithms.

InvalidKeyException - on incorrect key.

NoSuchProviderException - on incorrect provider.

SignatureException - on signature errors.

CertificateException - on encoding errors.

toString

public abstract String toString()

Returns a string representation of this certificate.

Overrides:

toString in class Object

Returns:

a string representation of this certificate.

getPublicKey

public abstract PublicKey getPublicKey()

Gets the public key from this certificate.

Returns:

the public key.