public class DataIntegrityChecker {
private String url, UID, salt, givenMD;
private String cheese;
private SingletonDataStore ds = SingletonDataStore.getInstance();
public DataIntegrityChecker(String stream) {
cheese = stream;
parse();
getSalt();
}
public boolean doesItPass() {
DataIntegrityFormat dif = new DataIntegrityFormat("SHA1", url);
System.out.println(givenMD);
System.out.println(dif.getMessageDigest(salt));
if (givenMD == null) return false;
if (givenMD.equals(dif.getMessageDigest(salt))) return true;
else return false;
}
public void getSalt() {
salt = ds.getSalt(UID);
}
public void parse() {
StringTokenizer st = new StringTokenizer(cheese, "?");
while (st.hasMoreTokens()) {
StringTokenizer st2 = new StringTokenizer(st.nextToken(), "=");
while (st2.hasMoreTokens()) {
String tempToken = st2.nextToken();
if (tempToken.equals("UID")) UID = st2.nextToken();
else if (tempToken.equals("MD")) givenMD = st2.nextToken();
else if (tempToken.equals("URL")) url = st2.nextToken();
}
}
}
/**
* For testing, we need a method to change url in the record.
*
* @param maliciousURL
*/
public void setWrongURL(String maliciousURL) {
url = maliciousURL;
}
}
public void getSalt() {
salt = ds.getSalt(UID);
}