FingerPrint findFingerPrint(byte[] fingerprint, boolean add, OTRCallbacks callback) {
String key = new String(fingerprint);
FingerPrint ret = (FingerPrint) fingerprintTable.get(key);
if (ret != null) return ret;
if (!add) return null;
ret = new FingerPrint();
ret.fingerPrint = new byte[fingerprint.length];
System.arraycopy(fingerprint, 0, ret.fingerPrint, 0, fingerprint.length);
ret.context = this;
fingerprintTable.put(key, ret);
/* Inform the user of the new fingerprint */
callback.newFingerprint(us, accountName, key, recName, ret.fingerPrint);
/* Arrange that the new fingerprint be written to disk */
callback.writeFingerprints();
return ret;
}