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package org.sufficientlysecure.keychain.pgp.linked;
import org.spongycastle.bcpg.UserAttributeSubpacket;
import org.spongycastle.util.Strings;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.pgp.WrappedUserAttribute;
import org.sufficientlysecure.keychain.util.Log;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map.Entry;
import java.util.Set;
/** The RawLinkedIdentity contains raw parsed data from a Linked Identity subpacket. */
public class RawLinkedIdentity {
public final int mNonce;
public final URI mUri;
protected RawLinkedIdentity(int nonce, URI uri) {
mNonce = nonce;
mUri = uri;
}
public byte[] getEncoded() {
byte[] uriData = Strings.toUTF8ByteArray(mUri.toASCIIString());
ByteBuffer buf = ByteBuffer.allocate(4 + uriData.length);
buf.putInt(mNonce);
buf.put(uriData);
return buf.array();
}
/** This method parses a linked id from a UserAttributeSubpacket, or returns null if the
* subpacket can not be parsed as a valid linked id.
*/
static RawLinkedIdentity fromAttributeSubpacket(UserAttributeSubpacket subpacket) {
if (subpacket.getType() != 100) {
return null;
}
byte[] data = subpacket.getData();
return fromSubpacketData(data);
}
public static RawLinkedIdentity fromSubpacketData(byte[] data) {
try {
int nonce = ByteBuffer.wrap(data).getInt();
String uri = Strings.fromUTF8ByteArray(Arrays.copyOfRange(data, 4, data.length));
return new RawLinkedIdentity(nonce, URI.create(uri));
} catch (IllegalArgumentException e) {
Log.e(Constants.TAG, "error parsing uri in (suspected) linked id packet");
return null;
}
}
public static RawLinkedIdentity fromResource (LinkedCookieResource res, int nonce) {
return new RawLinkedIdentity(nonce, res.toUri());
}
public WrappedUserAttribute toUserAttribute () {
return WrappedUserAttribute.fromSubpacket(WrappedUserAttribute.UAT_LINKED_ID, getEncoded());
}
public static String generateNonce() {
// TODO make this actually random
// byte[] data = new byte[4];
// new SecureRandom().nextBytes(data);
// return Hex.toHexString(data);
// debug for now
return "01234567";
}
}
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