content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one or more
   *  contributor license agreements.  See the NOTICE file distributed with
   *  this work for additional information regarding copyright ownership.
   *  The ASF licenses this file to You 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.
   */
  
  /**
  * @author Alexander V. Esin
  * @version $Revision$
  */
  
  package android.framework.org.apache.harmony.security_custom.x501;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Locale;
  import javax.security.auth.x500.X500Principal;
  import android.framework.org.apache.harmony.security_custom.asn1.ASN1SequenceOf;
  import android.framework.org.apache.harmony.security_custom.asn1.ASN1SetOf;
  import android.framework.org.apache.harmony.security_custom.asn1.BerInputStream;
  import android.framework.org.apache.harmony.security_custom.asn1.DerInputStream;
  import android.framework.org.apache.harmony.security_custom.x509.DNParser;
  
  
  /**
   * X.501 Name
   */
  public final class Name {
  
      /** ASN.1 DER encoding of Name */
      private volatile byte[] encoded;
  
      /** RFC1779 string */
      private String rfc1779String;
  
      /** RFC2253 string */
      private String rfc2253String;
  
      /** CANONICAL string */
      private String canonicalString;
  
      /** Collection of RDNs */
      private List<List<AttributeTypeAndValue>> rdn;
  
      /**
       * Creates new <code>Name</code> instance from its DER encoding
       *
       * @param encoding - ASN.1 DER encoding
       * @throws IOException - if encoding is wrong
       */
      public Name(byte[] encoding) throws IOException {
          DerInputStream in = new DerInputStream(encoding);
  
          if (in.getEndOffset() != encoding.length) {
              throw new IOException("Wrong content length");
          }
  
          ASN1.decode(in);
  
          this.rdn = (List<List<AttributeTypeAndValue>>) in.content;
      }
  
      /**
       * Creates new <code>Name</code> instance
       *
       * @param name - Name as String
       * @throws IOException - if string is wrong
       */
      public Name(String name) throws IOException {
          rdn = new DNParser(name).parse();
      }
  
      private Name(List<List<AttributeTypeAndValue>> rdn) {
          this.rdn = rdn;
      }
  
      /**
       * Returns <code>X500Principal</code> instance corresponding to this
       * <code>Name</code> instance
       *
       * @return equivalent X500Principal object
       */
      public X500Principal getX500Principal(){
          return new X500Principal(getEncoded());
      }
  
      /**
       * Returns Relative Distinguished Name as <code>String</code> according
       * the format requested
       *
       * @param format one of X500Principal.CANONICAL, X500Principal.RFC1779, or
       *     X500Principal.RFC2253, case insensitive
       */
      public String getName(String format) {
          //
          // check X500Principal constants first
          //
          if (X500Principal.RFC1779.equals(format)) {
  
              if (rfc1779String == null) {
                  rfc1779String = getName0(format);
              }
              return rfc1779String;
  
          } else if (X500Principal.RFC2253.equals(format)) {
  
              if (rfc2253String == null) {
                  rfc2253String = getName0(format);
              }
              return rfc2253String;
  
          } else if (X500Principal.CANONICAL.equals(format)) {
  
              if (canonicalString == null) {
                  canonicalString = getName0(format);
              }
              return canonicalString;
  
          }
          //
          // compare ignore case
          //
          else if (X500Principal.RFC1779.equalsIgnoreCase(format)) {
  
              if (rfc1779String == null) {
                  rfc1779String = getName0(X500Principal.RFC1779);
              }
              return rfc1779String;
  
          } else if (X500Principal.RFC2253.equalsIgnoreCase(format)) {
  
              if (rfc2253String == null) {
                  rfc2253String = getName0(X500Principal.RFC2253);
              }
              return rfc2253String;
  
          } else if (X500Principal.CANONICAL.equalsIgnoreCase(format)) {
  
              if (canonicalString == null) {
                  canonicalString = getName0(X500Principal.CANONICAL);
              }
              return canonicalString;
  
          } else {
              throw new IllegalArgumentException("Illegal format: " + format);
          }
      }
  
      /**
       * Returns Relative Distinguished Name as <code>String</code> according
       * the format requested, format is int value
       */
      private String getName0(String format) {
          StringBuilder name = new StringBuilder();
  
          // starting with the last element and moving to the first.
          for (int i = rdn.size() - 1; i >= 0; i--) {
              List<AttributeTypeAndValue> atavList = rdn.get(i);
  
              if (X500Principal.CANONICAL == format) {
                  atavList = new ArrayList<AttributeTypeAndValue>(atavList);
                  Collections.sort(atavList, new AttributeTypeAndValueComparator());
              }
  
              // Relative Distinguished Name to string
              Iterator<AttributeTypeAndValue> it = atavList.iterator();
              while (it.hasNext()) {
                  AttributeTypeAndValue attributeTypeAndValue = it.next();
                  attributeTypeAndValue.appendName(format, name);
                  if (it.hasNext()) {
                      // multi-valued RDN
                      if (X500Principal.RFC1779 == format) {
                          name.append(" + ");
                      } else {
                          name.append('+');
                      }
                  }
              }
  
              if (i != 0) {
                  name.append(',');
                  if (format == X500Principal.RFC1779) {
                      name.append(' ');
                  }
              }
          }
  
          String sName = name.toString();
          if (X500Principal.CANONICAL.equals(format)) {
              sName = sName.toLowerCase(Locale.US);
          }
          return sName;
      }
  
      /**
       * Gets encoded form of DN
       *
       * @return return encoding, no copying is performed
       */
      public byte[] getEncoded() {
          if (encoded == null) {
              encoded = ASN1.encode(this);
          }
          return encoded;
      }
  
      /**
       * According to RFC 3280 (http://www.ietf.org/rfc/rfc3280.txt)
       * X.501 Name structure is defined as follows:
       *
       * Name ::= CHOICE {
       *     RDNSequence }
       *
       * RDNSequence ::= SEQUENCE OF RelativeDistinguishedName
       *
       * RelativeDistinguishedName ::=
       *     SET OF AttributeTypeAndValue
       *
       */
      public static final ASN1SetOf ASN1_RDN = new ASN1SetOf(
              AttributeTypeAndValue.ASN1);
  
      public static final ASN1SequenceOf ASN1 = new ASN1SequenceOf(ASN1_RDN) {
  
          public Object getDecodedObject(BerInputStream in) {
              return new Name((List<List<AttributeTypeAndValue>>) in.content);
          }
  
          public Collection getValues(Object object) {
              return ((Name) object).rdn;
          }
      };
  }
  