/** * Return the string representation of an LDAP attribute in Java

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/** * Return the string representation of an LDAP attribute
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* from the specified entry * If the attribute is not present or has a zero length value, * then return the default If the attribute has more than one * value, then just return the first one * * @param entry an LDAP entry * @param attrN name of the attribute (eg, "cn") * @param defVal value to return if attribute does not * exist * @return value of attribute or defVal */ private String getValue( LDAPEntry entry, String attrN, String defVal) { LDAPAttribute attr = entrygetAttribute( attrN ); if ( attr == null ) { return defVal; } Enumeration enumVals = attrgetStringValues(); // Enumerate on values for this attribute if ( (enumVals == null) || !enumValshasMoreElements() ) { return defVal; } String theValue = (String)enumValsnextElement(); if ( (theValue == null) || (theValuelength() == 0) ) { return defVal; } return theValue; } /** * Return the binary representation of an LDAP attribute * value from the specified entry * If the attribute is not present, then return null If the * attribute has more than one value, then just return * the first one * * @param entry an LDAP entry * @param attrN name of the attribute (eg, "cn") * @return value of attribute as byte[] or null */ private byte[] getBinaryValue( LDAPEntry entry,
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String attrN ) { LDAPAttribute attr = entrygetAttribute( attrN ); if ( attr == null ) { return null; } Enumeration enumVals = attrgetByteValues(); if ( (enumVals == null) || (!enumValshasMoreElements()) ) { return null; } return (byte[])enumValsnextElement(); } /** * Return the LDAP scope constant for a string * value of "SCOPE_BASE", "SCOPE_ONE" or * "SCOPE_SUB" * * @param scope String representation of scope * @return LDAPConnection constant for the scope */ private static int getScope( String scope ) { if ( scopeequalsIgnoreCase("SCOPE_BASE") ) { return LDAPConnectionSCOPE_BASE; } else if ( scopeequalsIgnoreCase("SCOPE_ONE") ) { return LDAPConnectionSCOPE_ONE; } else { return LDAPConnectionSCOPE_SUB; } } /** * Return a String without attribute types in the format * "bjensen, people, airiuscom" from a DN like * "uid=bjensen,ou=people,o=airiuscom" * * @param theDN a fully formed DN * @return a simplified DN without attribute types */ private String prettyDN( String theDN ) { String[] dn = LDAPDNexplodeDN(theDN,true); String dncomps = ""; for ( int i=0; i<dnlength; i++ ) { dncomps += (i==0 "" : ", ") + dn[i];
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} return dncomps; } /** * Return the String representing the HTML form value * from the specified post or get * If form value does not exist or has no value, * then return an empty String * * @param req HTTPServletRequest * @param fdname name of the field in the HTML form, * (eg, "password") * @return value of field, or "" if not present */ private String readFormData( HttpServletRequest req, String fdname ) { String d = reqgetParameter(fdname); if ( d == null ) { return ""; } return dtrim(); } /** * Build an LDAPAttribute with the specified attribute * name and value If no value is specified, then the * attribute will be deleted with an LDAP replace operation * * @param attrN name of attribute (eg, "cn") * @param attrV value for attribute (eg, "Tom Jones"); pass * null for none * @return an LDAP attribute * */ private LDAPAttribute buildAttr( String attrN, String attrV ) { if ( attrV == null ) { return new LDAPAttribute( attrN ); } else { return new LDAPAttribute( attrN, attrV ); } }
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The modifyPwd method handles requests by users to change their passwords It accepts two copies of the new password (one for con rmation), and the old password The connection for this operation is allocated outside the normal pool of search connections because it will use different credentials The credentials are validated by authenticating, and then the userPassword attribute is modi ed
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/** * Handle requests for password modification by the user * Validate that both new passwords are OK and that the * old password is correct (by binding to the directory) * * @param req HTTPServletRequest * @param out output stream * @exception ServletException or IOException on reading * or writing form data */ private void modifyPwd( HttpServletRequest req, PrintWriter out ) throws ServletException, IOException {
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LDAPConnection ld = null; String theDN; String oldpw; String newpw1; String newpw2; int err = 0;
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// Get detail arguments (the DN) theDN = readFormData(req,FLDNAME_DN)toLowerCase(); if ( theDNlength() == 0 ) { errorMessage(out,"Invalid Distingushed Name"); return; } theDN = LDAPUrldecode(theDN); oldpw = readFormData(req,FLDNAME_OLDPW); newpw1 = readFormData(req,FLDNAME_NEWPW1); newpw2 = readFormData(req,FLDNAME_NEWPW2);
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// The passwords must pass the following tests: // old must be valid and nonzero length // new1 and new2 must match and be nonzero length
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