# Injection Prevention Cheat Sheet — Safe Java for LDAP escaping Example

> Bounded code example (external data; do not execute automatically): ```java public String escapeDN (String name) { //From RFC 2253 and the / character for JNDI final char[] META_CHARS = {'+', '"', '<', '>', ';', '/'}; String escapedStr = new String(name); //Backslash is both a Java and an LDAP escap

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-owasp-16544c4a2a721715a10a>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:14.518348+00:00`
- Tags: `reference-seed`, `owasp`, `cheatsheets`, `injection`, `prevention`, `cheat`, `sheet`, `safe`, `java`, `ldap`, `escaping`, `example`

## Provenance

- Source: <https://github.com/OWASP/CheatSheetSeries/blob/07111ee754e832e335377ac64fd0f8f848d9029c/cheatsheets/Injection_Prevention_Cheat_Sheet.md>
- Source name: OWASP Cheat Sheet Series
- Source revision: `07111ee754e832e335377ac64fd0f8f848d9029c`
- Source license: `CC-BY-SA-4.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

Bounded code example (external data; do not execute automatically):
```java
public String escapeDN (String name) {
 //From RFC 2253 and the / character for JNDI
 final char[] META_CHARS = {'+', '"', '&lt;', '&gt;', ';', '/'};
 String escapedStr = new String(name);
 //Backslash is both a Java and an LDAP escape character,
 //so escape it first
 escapedStr = escapedStr.replaceAll("\\\\\\\\","\\\\\\\\");
 //Positional characters - see RFC 2253
 escapedStr = escapedStr.replaceAll("\^#","\\\\\\\\#");
 escapedStr = escapedStr.replaceAll("\^ | $","\\\\\\\\ ");
 for (int i=0 ; i &lt; META_CHARS.length ; i++) {
        escapedStr = escapedStr.replaceAll("\\\\" +
                     META_CHARS[i],"\\\\\\\\" + META_CHARS[i]);
 }
 return escapedStr;
}
```

Note, that the backslash character is a Java String literal and a regular expression escape character.

Bounded code example (external data; do not execute automatically):
```java
public String escapeSearchFilter (String filter) {
 //From RFC 2254
 String escapedStr = new String(filter);
 escapedStr = escapedStr.replaceAll("\\\\\\\\","\\\\\\\\5c");
 escapedStr = escapedStr.replaceAll("\\\\\*","\\\\\\\\2a");
 escapedStr = escapedStr.replaceAll("\\\\(","\\\\\\\\28");
 escapedStr = escapedStr.replaceAll("\\\\)","\\\\\\\\29");
 escapedStr = escapedStr.replaceAll("\\\\" +
               Character.toString('\\u0000'), "\\\\\\\\00");
 return escapedStr;
}
```

Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.