com.novell.ldap.LDAPDN Maven / Gradle / Ivy
/* **************************************************************************
* $OpenLDAP: pkg/jldap/com/novell/ldap/LDAPDN.java,v 1.27 2004/01/16 04:46:25 sunilk Exp $
*
* Copyright (C) 1999, 2000, 2001 Novell, Inc. All Rights Reserved.
*
* THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND
* TREATIES. USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT
* TO VERSION 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS
* AVAILABLE AT HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE"
* IN THE TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION
* OF THIS WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP
* PUBLIC LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT
* THE PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
******************************************************************************/
package com.novell.ldap;
import com.novell.ldap.util.DN;
import com.novell.ldap.util.RDN;
/**
* A utility class to facilitate composition and deomposition
* of distinguished names (DNs).
*
* Specifies methods for manipulating a distinguished name (DN)
* and a relative distinguished name (RDN).
*/
public class LDAPDN {
/**
* Compares the two strings per the distinguishedNameMatch equality matching
* (using case-ignore matching). IllegalArgumentException is thrown if one
* or both DNs are invalid. UnsupportedOpersationException is thrown if the
* API implementation is not able to detemine if the DNs match or not.
*
* @param dn1 String form of the first DN to compare.
*
* @param dn2 String form of the second DN to compare.
*
* @return Returns true if the two strings correspond to the same DN; false
* if the DNs are different.
*/
public static boolean equals (String dn1, String dn2) {
DN dnA = new DN(dn1);
DN dnB = new DN(dn2);
return dnA.equals(dnB);
}
/**
* Returns the RDN after escaping the characters requiring escaping.
*
* For example, for the rdn "cn=Acme, Inc", the escapeRDN method
* returns "cn=Acme\, Inc".
*
* escapeRDN escapes the AttributeValue by inserting '\' before the
* following chars: * ',' '+' '"' '\' '<' '>' ';'
* '#' if it comes at the beginning of the string, and
* ' ' (space) if it comes at the beginning or the end of a string.
* Note that single-valued attributes can be used because of ambiguity. See
* RFC 2253
*
* @param rdn The RDN to escape.
*
*@return The RDN with escaping characters.
*/
public static String escapeRDN (String rdn) {
StringBuffer escapedS = new StringBuffer(rdn);
int i = 0;
while (i < escapedS.length() && escapedS.charAt(i) != '='){
i++; //advance until we find the separator =
}
if ( i == escapedS.length()){
throw new IllegalArgumentException("Could not parse RDN: Attribute " +
"type and name must be separated by an equal symbol, '='");
}
i++;
//check for a space or # at the beginning of a string.
if ((escapedS.charAt(i) == ' ') || (escapedS.charAt(i) == '#')){
escapedS.insert(i++, '\\');
}
//loop from second char to the second to last
for ( ; i < escapedS.length(); i++){
if((escapedS.charAt(i) == ',') || (escapedS.charAt(i) == '+') ||
(escapedS.charAt(i) == '"') || (escapedS.charAt(i) == '\\') ||
(escapedS.charAt(i) == '<') || (escapedS.charAt(i) == '>') ||
(escapedS.charAt(i) == ';')) {
escapedS.insert( i++,'\\');
}
}
//check last char for a space
if (escapedS.charAt(escapedS.length()-1) == ' ') {
escapedS.insert(escapedS.length()-1, '\\');
}
return escapedS.toString();
}
/**
* Returns the individual components of a distinguished name (DN).
*
* @param dn The distinguished name, for example, "cn=Babs
* Jensen,ou=Accounting,o=Acme,c=US"
*
* @param noTypes If true, returns only the values of the
* components and not the names. For example, "Babs
* Jensen", "Accounting", "Acme", "US" instead of
* "cn=Babs Jensen", "ou=Accounting", "o=Acme", and
* "c=US".
*
* @return An array of strings representing the individual components
* of a DN, or null if the DN is not valid.
*/
public static String[] explodeDN(String dn, boolean noTypes) {
DN dnToExplode = new DN(dn);
return dnToExplode.explodeDN(noTypes);
}
/**
* Returns the individual components of a relative distinguished name
* (RDN), normalized.
*
* @param rdn The relative distinguished name, or in other words,
* the left-most component of a distinguished name.
*
* @param noTypes If true, returns only the values of the
* components, and not the names of the component, for
* example "Babs Jensen" instead of "cn=Babs Jensen".
*
* @return An array of strings representing the individual components
* of an RDN, or null if the RDN is not a valid RDN.
*/
public static String[] explodeRDN(String rdn, boolean noTypes) {
RDN rdnToExplode = new RDN(rdn);
return rdnToExplode.explodeRDN(noTypes);
}
/**
* Returns true if the string conforms to distinguished name syntax.
* @param dn String to evaluate fo distinguished name syntax.
* @return true if the dn is valid.
*/
public static boolean isValid(String dn){
try {
new DN(dn);
} catch (IllegalArgumentException iae){
return false;
}
return true;
}
/**
* Returns the DN normalized by removal of non-significant space characters
* as per RFC 2253, section4.
*
* @return a normalized string
*/
public static String normalize(String dn){
DN testDN = new DN(dn);
return testDN.toString();
}
/**
* Returns the RDN after unescaping the characters requiring escaping.
*
* For example, for the rdn "cn=Acme\, Inc", the unescapeRDN method
* returns "cn=Acme, Inc".
* Note:This function doesn't check for the
* validity of the RDN string use isValid(String) function to check the
* validity. The results is undefined for invalid RDN's.
*
* unescapeRDN unescapes the AttributeValue by
* removing the '\' when the next character fits the following:
* ',' '+' '"' '\' '<' '>' ';'
* '#' if it comes at the beginning of the Attribute Name
* (without the '\').
* ' ' (space) if it comes at the beginning or the end of the Attribute Name
*
* @param rdn The RDN to unescape.
*
* @return The RDN with the escaping characters removed.
* @see LDAPDN#isValid(String)
*/
public static String unescapeRDN (String rdn) {
StringBuffer unescaped = new StringBuffer();
int i = 0;
while (i < rdn.length() && rdn.charAt(i) != '='){
unescaped.append(rdn.charAt(i));
i++; //advance until we find the separator =
}
//add character '='
unescaped.append(rdn.charAt(i));
if ( i == rdn.length()){
throw new IllegalArgumentException("Could not parse rdn: Attribute "
+ "type and name must be separated by an equal symbol, '='");
}
i++;
//check if the first two chars are "\ " (slash space) or "\#"
if (( rdn.charAt(i) == '\\') && (i+1 < rdn.length()-1) //bounds checking
&& ((rdn.charAt(i+1) == ' ') || (rdn.charAt(i+1) == '#'))){
i++;
}
for ( ; i < rdn.length(); i++){
//if the current char is a slash, not the end char, and is followed
// by a special char then...
if ((rdn.charAt(i)== '\\') && (i != rdn.length()-1)){
if((rdn.charAt(i+1) == ',') || (rdn.charAt(i+1) == '+') ||
(rdn.charAt(i+1) == '"') || (rdn.charAt(i+1) == '\\') ||
(rdn.charAt(i+1) == '<') || (rdn.charAt(i+1) == '>') ||
(rdn.charAt(i+1) == ';'))
{ //I'm not sure if I have to check for these special chars
unescaped.append(rdn.charAt(i+1));
i++;
continue;
}
//check if the last two chars are "\ "
else if ((rdn.charAt(i+1) == ' ') && (i+2 == rdn.length())){
//if the last char is a space
continue;
}
}
unescaped.append(rdn.charAt(i));
}
return unescaped.toString();
}
}//end class LDAPDN
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