javax.security.cert

Class Certificate

  1. java.lang.Object
  2. extended byjavax.security.cert.Certificate
Direct known subclasses:
X509Certificate

  1. public abstract class Certificate
  2. extends Object

Abstract class for managing a variety of identity certificates. An identity certificate is a guarantee by a principal that a public key is that of another principal. (A principal represents an entity such as an individual user, a group, or a corporation.)

This class is an abstraction for certificates that have different formats but important common uses. For example, different types of certificates, such as X.509 and PGP, share general certificate functionality (like encoding and verifying) and some types of information (like a public key).

X.509, PGP, and SDSI certificates can all be implemented by subclassing the Certificate class, even though they contain different sets of information, and they store and retrieve the information in different ways.

Note: The classes in the package javax.security.cert exist for compatibility with earlier versions of the Java Secure Sockets Extension (JSSE). New applications should instead use the standard J2SE certificate classes located in java.security.cert.

Since:
1.4
See Also:
X509Certificate

Constructor Summary

Constructor and Description
Certificate()

Method Summary

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

Constructor Detail

Certificate

  1. public Certificate()

Method Detail

equals

  1. public boolean equals(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 if the encoded forms of the two certificates match, false otherwise.

hashCode

  1. public int hashCode()
Returns a hashcode value for this certificate from its encoded form.
Overrides:
hashCode in class Object
Returns:
the hashcode value.

getEncoded

  1. public abstract byte[] getEncoded( )
  2. 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:
encoded form of this certificate
Throws:
CertificateEncodingException - on internal certificate encoding failure

verify

  1. public abstract void verify(PublicKey key)
  2. throws CertificateException
  3. NoSuchAlgorithmException
  4. InvalidKeyException
  5. NoSuchProviderException
  6. 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

  1. public abstract void verify(PublicKey key,
  2. String sigProvider)
  3. throws CertificateException
  4. NoSuchAlgorithmException
  5. InvalidKeyException
  6. NoSuchProviderException
  7. 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

  1. public abstract String toString( )
Returns a string representation of this certificate.
Overrides:
toString in class Object
Returns:
a string representation of this certificate.

getPublicKey

  1. public abstract PublicKey getPublicKey( )
Gets the public key from this certificate.
Returns:
the public key.