private Hash getHash(String name) {
String key = name.substring(PREFIX.length());
key = key.substring(0, 44);
// Hash h = new Hash();
try {
// h.fromBase64(key);
byte[] b = Base64.decode(key);
if (b == null) return null;
Hash h = Hash.create(b);
return h;
} catch (Exception dfe) {
_log.warn("Invalid base64 [" + key + "]", dfe);
return null;
}
}
/** Verify with the "olddest" property's public key using the "oldsig" property */
public boolean hasValidInnerSig() {
if (props == null || name == null || dest == null) return false;
boolean rv = false;
// don't cache result
if (true) {
StringWriter buf = new StringWriter(1024);
String sig = props.getProperty(PROP_OLDSIG);
String olddest = props.getProperty(PROP_OLDDEST);
if (sig == null || olddest == null) return false;
buf.append(name);
buf.append(KV_SEPARATOR);
buf.append(dest);
try {
writeProps(buf, true, true);
} catch (IOException ioe) {
// won't happen
return false;
}
byte[] sdata = Base64.decode(sig);
if (sdata == null) return false;
Destination d;
try {
d = new Destination(olddest);
} catch (DataFormatException dfe) {
return false;
}
SigningPublicKey spk = d.getSigningPublicKey();
SigType type = spk.getType();
if (type == null) return false;
Signature s;
try {
s = new Signature(type, sdata);
} catch (IllegalArgumentException iae) {
return false;
}
rv = DSAEngine.getInstance().verifySignature(s, DataHelper.getUTF8(buf.toString()), spk);
}
return rv;
}