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• X509CertificateVersion.java

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com.unboundid.util.ssl.cert.X509CertificateVersion Maven / Gradle / Ivy

/*
 * Copyright 2017-2022 Ping Identity Corporation
 * All Rights Reserved.
 */
/*
 * Copyright 2017-2022 Ping Identity Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * Copyright (C) 2017-2022 Ping Identity Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (GPLv2 only)
 * or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
 * as published by the Free Software Foundation.
 *
 * This program 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 this program; if not, see .
 */
package com.unboundid.util.ssl.cert;



import com.unboundid.util.NotNull;
import com.unboundid.util.Nullable;
import com.unboundid.util.StaticUtils;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;



/**
 * This enum defines a set of supported X.509 certificate versions.
 */
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public enum X509CertificateVersion
{
  /**
   * The X.509 v1 certificate version.
   */
  V1(0, "v1"),



  /**
   * The X.509 v2 certificate version.
   */
  V2(1, "v2"),



  /**
   * The X.509 v3 certificate version.
   */
  V3(2, "v3");



  // The integer value for this certificate version, as used in the encoded
  // X.509 certificate.
  private final int intValue;

  // The name for this X.509 certificate version.
  @NotNull private final String name;



  /**
   * Creates a new X.509 certificate version with the provided information.
   *
   * @param  intValue  The integer value for the certificate version.  Note that
   *                   this is the integer value that is used in the encoded
   *                   certificate, and not the logical version number that the
   *                   encoded value represents (for example, the "v1"
   *                   certificate version has an integer value of 0 rather than
   *                   1).
   * @param  name      The name for this certificate version.  It must not be
   *                   {@code null}.
   */
  X509CertificateVersion(final int intValue, @NotNull final String name)
  {
    this.intValue = intValue;
    this.name = name;
  }



  /**
   * Retrieves the integer value for this certificate version.  Note that this
   * is the integer value that is used in the encoded certificate, and not the
   * logical version number that the encoded value represents (for example, the
   * "v1" certificate version has an integer value of 0 rather than 1).
   *
   * @return  The integer value for this certificate version.
   */
  int getIntValue()
  {
    return intValue;
  }



  /**
   * Retrieves the name for this certificate version.
   *
   * @return  The name for this certificate version.
   */
  @NotNull()
  public String getName()
  {
    return name;
  }



  /**
   * Retrieves the certificate version for the provided integer value.
   *
   * @param  intValue  The integer value for the certificate version to
   *                   retrieve.  Note that this is the integer value that is
   *                   used in the encoded certificate, and not the logical
   *                   version number that the encoded value represents (for
   *                   example, the "v1" certificate version has an integer
   *                   value of 0 rather than 1).
   *
   * @return  The certificate version for the provided integer value, or
   *          {@code null} if the provided version does not correspond to any
   *          known certificate value.
   */
  @Nullable()
  static X509CertificateVersion valueOf(final int intValue)
  {
    for (final X509CertificateVersion v : values())
    {
      if (v.intValue == intValue)
      {
        return v;
      }
    }

    return null;
  }



  /**
   * Retrieves the X.509 certificate version with the specified name.
   *
   * @param  name  The name of the X.509 certificate version to retrieve.  It
   *               must not be {@code null}.
   *
   * @return  The requested X.509 certificate version, or {@code null} if no
   *          such version is defined.
   */
  @Nullable()
  public static X509CertificateVersion forName(@NotNull final String name)
  {
    switch (StaticUtils.toLowerCase(name))
    {
      case "1":
      case "v1":
        return V1;
      case "2":
      case "v2":
        return V2;
      case "3":
      case "v3":
        return V3;
      default:
        return null;
    }
  }
}