x509certificate.java

gcc的JAVA模块的源代码

/* X509Certificate.java --- X.509 Certificate class
   Copyright (C) 1999,2003 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


package java.security.cert;

import java.math.BigInteger;
import java.security.Principal;
import java.security.PublicKey;
import java.security.NoSuchAlgorithmException;
import java.security.InvalidKeyException;
import java.security.NoSuchProviderException;
import java.security.SignatureException;
import java.util.Date;

/**
 * X509Certificate is the abstract class for X.509 certificates.
 * This provides a stanard class interface for accessing all 
 * the attributes of X.509 certificates.
 *
 * <p>In June 1996, the basic X.509 v3 format was finished by 
 * ISO/IEC and ANSI X.9. The ASN.1 DER format is below:
 *
 * <blockquote><pre>
 * Certificate  ::=  SEQUENCE  {
 *   tbsCertificate       TBSCertificate,
 *   signatureAlgorithm   AlgorithmIdentifier,
 *   signatureValue       BIT STRING  }
 * </pre></blockquote>
 *
 * <p>These certificates are widely used in various Internet 
 * protocols to support authentication. It is used in 
 * Privacy Enhanced Mail (PEM), Transport Layer Security (TLS),
 * Secure Sockets Layer (SSL), code signing for trusted software
 * distribution, and Secure Electronic Transactions (SET).
 *
 * <p>The certificates are managed and vouched for by 
 * <I>Certificate Authorities</I> (CAs). CAs are companies or 
 * groups that create certificates by placing the data in the 
 * X.509 certificate format and signing it with their private
 * key. CAs serve as trusted third parties by certifying that
 * the person or group specified in the certificate is who
 * they say they are. 
 *
 * <p>The ASN.1 defintion for <I>tbsCertificate</I> is
 * 
 * <blockquote><pre>
 * TBSCertificate  ::=  SEQUENCE  {
 *   version         [0]  EXPLICIT Version DEFAULT v1,
 *   serialNumber         CertificateSerialNumber,
 *   signature            AlgorithmIdentifier,
 *   issuer               Name,
 *   validity             Validity,
 *   subject              Name,
 *   subjectPublicKeyInfo SubjectPublicKeyInfo,
 *   issuerUniqueID  [1]  IMPLICIT UniqueIdentifier OPTIONAL,
 *                        -- If present, version shall be v2 or v3
 *   subjectUniqueID [2]  IMPLICIT UniqueIdentifier OPTIONAL,
 *                        -- If present, version shall be v2 or v3
 *   extensions      [3]  EXPLICIT Extensions OPTIONAL
 *                        -- If present, version shall be v3
 * }
 *
 * Version  ::=  INTEGER  {  v1(0), v2(1), v3(2)  }
 *
 * CertificateSerialNumber  ::=  INTEGER
 *
 * Validity ::= SEQUENCE {
 *   notBefore      Time,
 *   notAfter       Time }
 *
 * Time ::= CHOICE {
 *   utcTime        UTCTime,
 *   generalTime    GeneralizedTime }
 *
 * UniqueIdentifier  ::=  BIT STRING
 *
 * SubjectPublicKeyInfo  ::=  SEQUENCE  {
 *   algorithm            AlgorithmIdentifier,
 *   subjectPublicKey     BIT STRING  }
 *
 * Extensions  ::=  SEQUENCE SIZE (1..MAX) OF Extension
 *
 * Extension  ::=  SEQUENCE  {
 *   extnID      OBJECT IDENTIFIER,
 *   critical    BOOLEAN DEFAULT FALSE,
 *   extnValue   OCTET STRING  }
 * </pre></blockquote>
 * 
 * Certificates are created with the CertificateFactory.
 *
 * <p>References:
 *
 * <ol>
 * <li>Olivier Dubuisson, Philippe Fouquart (Translator) <i>ASN.1 -
 * Communication between heterogeneous systems</i>, (C) September 2000,
 * Morgan Kaufmann Publishers, ISBN 0-12-6333361-0. Available on-line at
 * <a
 * href="http://www.oss.com/asn1/dubuisson.html">http://www.oss.com/asn1/dubuisson.html</a></li>
 * <li>R. Housley et al, <i><a href="http://www.ietf.org/rfc/rfc3280.txt">RFC
 * 3280: Internet X.509 Public Key Infrastructure Certificate and CRL
 * Profile</a></i>.</li>
 * </ol>
 *
 * @since JDK 1.2
 * @author Mark Benvenuto
 * @author Casey Marshall ([e-mail])
 */
public abstract class X509Certificate extends Certificate implements X509Extension
{
  private static final long serialVersionUID = -2491127588187038216L;

  /**
   * Constructs a new certificate of the specified type.
   */
  protected X509Certificate()
  {
    super( "X.509" );
  }

  /**
     Checks the validity of the X.509 certificate. It is valid
     if the current date and time are within the period specified
     by the certificate.

     The ASN.1 DER encoding is:

     validity             Validity,

     Validity ::= SEQUENCE {
     notBefore      Time,
     notAfter       Time }

     Time ::= CHOICE {
     utcTime        UTCTime,
     generalTime    GeneralizedTime }

     Consult rfc2459 for more information.

     @throws CertificateExpiredException if the certificate expired
     @throws CertificateNotYetValidException if the certificate is 
     not yet valid
  */
  public abstract void checkValidity()
    throws CertificateExpiredException,
    CertificateNotYetValidException;

  /**
     Checks the validity of the X.509 certificate for the 
     specified time and date. It is valid if the specified 
     date and time are within the period specified by 
     the certificate.

     @throws CertificateExpiredException if the certificate expired 
     based on the date
     @throws CertificateNotYetValidException if the certificate is 
     not yet valid based on the date
  */
  public abstract void checkValidity(Date date)
    throws CertificateExpiredException,
    CertificateNotYetValidException;

  /**
     Returns the version of this certificate.

     The ASN.1 DER encoding is:

     version         [0]  EXPLICIT Version DEFAULT v1,

     Version  ::=  INTEGER  {  v1(0), v2(1), v3(2)  }

     Consult rfc2459 for more information.

     @return version number of certificate	
  */
  public abstract int getVersion();

  /**
     Gets the serial number for serial Number in
     this Certifcate. It must be a unique number 
     unique other serial numbers from the granting CA.

     The ASN.1 DER encoding is:

     serialNumber         CertificateSerialNumber,

     CertificateSerialNumber  ::=  INTEGER

     Consult rfc2459 for more information.

     @return the serial number for this X509CRLEntry.
  */
  public abstract BigInteger getSerialNumber();

  /**
     Returns the issuer (issuer distinguished name) of the 
     Certificate. The issuer is the entity who signed 
     and issued the Certificate.

     The ASN.1 DER encoding is:

     issuer                  Name,

     Name ::= CHOICE {
     RDNSequence }

     RDNSequence ::= SEQUENCE OF RelativeDistinguishedName

     RelativeDistinguishedName ::=
     SET OF AttributeTypeAndValue

     AttributeTypeAndValue ::= SEQUENCE {
     type     AttributeType,
     value    AttributeValue }

     AttributeType ::= OBJECT IDENTIFIER

     AttributeValue ::= ANY DEFINED BY AttributeType

     DirectoryString ::= CHOICE {
     teletexString           TeletexString (SIZE (1..MAX)),
     printableString         PrintableString (SIZE (1..MAX)),
     universalString         UniversalString (SIZE (1..MAX)),
     utf8String              UTF8String (SIZE (1.. MAX)),
     bmpString               BMPString (SIZE (1..MAX)) }

     Consult rfc2459 for more information.

     @return the issuer in the Principal class
  */
  public abstract Principal getIssuerDN();

  /**
     Returns the subject (subject distinguished name) of the 
     Certificate. The subject is the entity who the Certificate
     identifies.

     The ASN.1 DER encoding is:

     subject              Name,

     Consult rfc2459 for more information.

     @return the issuer in the Principal class
  */
  public abstract Principal getSubjectDN();

  /**
     Returns the date that this certificate is not to be used
     before, <I>notBefore</I>.

     The ASN.1 DER encoding is:

     validity             Validity,

     Validity ::= SEQUENCE {
     notBefore      Time,
     notAfter       Time }

     Time ::= CHOICE {
     utcTime        UTCTime,
     generalTime    GeneralizedTime }