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package org.sufficientlysecure.keychain.pgp;
import org.spongycastle.openpgp.PGPException;
import org.spongycastle.openpgp.PGPKeyRing;
import org.spongycastle.openpgp.PGPObjectFactory;
import org.spongycastle.openpgp.PGPPrivateKey;
import org.spongycastle.openpgp.PGPPublicKey;
import org.spongycastle.openpgp.PGPSecretKey;
import org.spongycastle.openpgp.PGPSecretKeyRing;
import org.spongycastle.openpgp.operator.PBESecretKeyDecryptor;
import org.spongycastle.openpgp.operator.jcajce.JcePBESecretKeyDecryptorBuilder;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
import org.sufficientlysecure.keychain.util.IterableIterator;
import org.sufficientlysecure.keychain.util.Log;
import java.io.IOException;
import java.util.Iterator;
public class WrappedSecretKeyRing extends WrappedKeyRing {
private PGPSecretKeyRing mRing;
public WrappedSecretKeyRing(byte[] blob, boolean isRevoked, int verified)
{
super(isRevoked, verified);
PGPObjectFactory factory = new PGPObjectFactory(blob);
PGPKeyRing keyRing = null;
try {
if ((keyRing = (PGPKeyRing) factory.nextObject()) == null) {
Log.e(Constants.TAG, "No keys given!");
}
} catch (IOException e) {
Log.e(Constants.TAG, "Error while converting to PGPKeyRing!", e);
}
mRing = (PGPSecretKeyRing) keyRing;
}
PGPSecretKeyRing getRing() {
return mRing;
}
public WrappedSecretKey getSubKey() {
return new WrappedSecretKey(this, mRing.getSecretKey());
}
public WrappedSecretKey getSubKey(long id) {
return new WrappedSecretKey(this, mRing.getSecretKey(id));
}
/** Getter that returns the subkey that should be used for signing. */
WrappedSecretKey getSigningSubKey() throws PgpGeneralException {
PGPSecretKey key = mRing.getSecretKey(getSignId());
if(key != null) {
WrappedSecretKey cKey = new WrappedSecretKey(this, key);
if(!cKey.canSign()) {
throw new PgpGeneralException("key error");
}
return cKey;
}
// TODO handle with proper exception
throw new PgpGeneralException("no signing key available");
}
public boolean hasPassphrase() {
PGPSecretKey secretKey = null;
boolean foundValidKey = false;
for (Iterator keys = mRing.getSecretKeys(); keys.hasNext(); ) {
secretKey = (PGPSecretKey) keys.next();
if (!secretKey.isPrivateKeyEmpty()) {
foundValidKey = true;
break;
}
}
if(!foundValidKey) {
return false;
}
try {
PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder()
.setProvider("SC").build("".toCharArray());
PGPPrivateKey testKey = secretKey.extractPrivateKey(keyDecryptor);
return testKey == null;
} catch(PGPException e) {
// this means the crc check failed -> passphrase required
return true;
}
}
public IterableIterator<WrappedSecretKey> secretKeyIterator() {
final Iterator<PGPSecretKey> it = mRing.getSecretKeys();
return new IterableIterator<WrappedSecretKey>(new Iterator<WrappedSecretKey>() {
@Override
public boolean hasNext() {
return it.hasNext();
}
@Override
public WrappedSecretKey next() {
return new WrappedSecretKey(WrappedSecretKeyRing.this, it.next());
}
@Override
public void remove() {
it.remove();
}
});
}
public IterableIterator<WrappedPublicKey> publicKeyIterator() {
final Iterator<PGPPublicKey> it = getRing().getPublicKeys();
return new IterableIterator<WrappedPublicKey>(new Iterator<WrappedPublicKey>() {
@Override
public boolean hasNext() {
return it.hasNext();
}
@Override
public WrappedPublicKey next() {
return new WrappedPublicKey(WrappedSecretKeyRing.this, it.next());
}
@Override
public void remove() {
it.remove();
}
});
}
}
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