String algorithm = params.getAlgorithm ();
int nccount = params.getNCCount ();
String ncstring=null;
if (header == null) {
throw new ProtocolException ("No authentication information in response");
}
if (nccount != -1) {
ncstring = Integer.toHexString (nccount).toUpperCase();
int len = ncstring.length();
if (len < 8)
ncstring = zeroPad [len] + ncstring;
}
try {
String expected = computeDigest(false, username,passwd,realm,
method, uri, nonce, cnonce, ncstring);
HeaderParser p = new HeaderParser (header);
String rspauth = p.findValue ("rspauth");
if (rspauth == null) {
throw new ProtocolException ("No digest in response");
}
if (!rspauth.equals (expected)) {
throw new ProtocolException ("Response digest invalid");
}
/* Check if there is a nextnonce field */
String nextnonce = p.findValue ("nextnonce");
if (nextnonce != null && ! "".equals(nextnonce)) {
params.setNonce (nextnonce);
}
} catch (NoSuchAlgorithmException ex) {
throw new ProtocolException ("Unsupported algorithm in response");
}
}