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20 package org.apache.wss4j.common.util;
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22 import javax.naming.InvalidNameException;
23 import javax.naming.ldap.LdapName;
24 import javax.naming.ldap.Rdn;
25 import java.util.List;
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39 public class CommaDelimiterRfc2253Name {
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51 public String execute(String rfc2253String) {
52 StringBuilder commaDNBuilder = new StringBuilder();
53 try {
54 LdapName ldapname = new LdapName(rfc2253String);
55 List<Rdn> rdns = ldapname.getRdns();
56
57 for (int i = rdns.size() - 1; i >= 0; i--) {
58 Rdn rdn = rdns.get(i);
59 String rdnString = rdn.toString();
60 String appendString;
61 if (requiresDoubleQuoting(rdnString)) {
62 appendString = convertToDoubleQuotes(rdnString);
63 } else {
64 appendString = rdnString;
65 }
66 if (i == rdns.size() - 1) {
67 commaDNBuilder.append(appendString);
68 } else {
69 commaDNBuilder.append(", ").append(appendString);
70 }
71 }
72 } catch (InvalidNameException e) {
73 throw new IllegalArgumentException(" The distinguished name cannot be parsed : " + rfc2253String);
74 }
75 return commaDNBuilder.toString();
76 }
77
78 private boolean requiresDoubleQuoting(String rdnString) {
79 return rdnString.contains("\\");
80 }
81
82 private String convertToDoubleQuotes(String rdnString) {
83 StringBuilder quotedString = new StringBuilder();
84 int indexEquals = rdnString.indexOf('=');
85 String firstPart = rdnString.substring(0, indexEquals + 1);
86 String lastPart = rdnString.substring(indexEquals + 1);
87 String secondPart = unEscapeRfc2253RdnSubPart(lastPart);
88 return quotedString.append(firstPart).append('"').append(secondPart).append('"').toString();
89 }
90
91 String unEscapeRfc2253RdnSubPart(String value) {
92 char[] charArray = value.toCharArray();
93 boolean previousEscape = false;
94 StringBuilder unescapedRdnPart = new StringBuilder();
95 for (char currentChar : charArray) {
96 if (currentChar != '\\') {
97 previousEscape = false;
98 unescapedRdnPart.append(currentChar);
99 } else if (previousEscape) {
100 unescapedRdnPart.append(currentChar);
101 previousEscape = false;
102 } else {
103 previousEscape = true;
104 }
105 }
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107 return unescapedRdnPart.toString();
108 }
109
110 }