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Code Issues Projects Releases Wiki Activity

Move validator's signature verification into ClientHelper

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This commit is contained in:
Torsten Grote
2016-10-18 13:35:27 -02:00
parent 1e36f21cc8
commit 8dc529cc3f
7 changed files with 64 additions and 116 deletions
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24
briar-core/src/org/briarproject/clients/ClientHelperImpl.java
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@@ -5,6 +5,7 @@ import org.briarproject.api.clients.ClientHelper;
import org.briarproject.api.crypto.CryptoComponent;
import org.briarproject.api.crypto.KeyParser;
import org.briarproject.api.crypto.PrivateKey;
import org.briarproject.api.crypto.PublicKey;
import org.briarproject.api.crypto.Signature;
import org.briarproject.api.data.BdfDictionary;
import org.briarproject.api.data.BdfList;
@@ -19,6 +20,7 @@ import org.briarproject.api.db.DbException;
import org.briarproject.api.db.Metadata;
import org.briarproject.api.db.Transaction;
import org.briarproject.api.sync.GroupId;
import org.briarproject.api.sync.InvalidMessageException;
import org.briarproject.api.sync.Message;
import org.briarproject.api.sync.MessageFactory;
import org.briarproject.api.sync.MessageId;
@@ -320,4 +322,26 @@ class ClientHelperImpl implements ClientHelper {
signature.update(toByteArray(toSign));
return signature.sign();
}
@Override
public void verifySignature(byte[] sig, byte[] publicKey, BdfList signed)
throws InvalidMessageException {
try {
// Parse the public key
KeyParser keyParser = cryptoComponent.getSignatureKeyParser();
PublicKey key = keyParser.parsePublicKey(publicKey);
// Verify the signature
Signature signature = cryptoComponent.getSignature();
signature.initVerify(key);
signature.update(toByteArray(signed));
if (!signature.verify(sig)) {
throw new InvalidMessageException("Invalid signature");
}
} catch (GeneralSecurityException e) {
throw new InvalidMessageException("Invalid public key");
} catch (FormatException e) {
throw new InvalidMessageException(e);
}
}
}