@Override
public boolean removeMetadataBlob(
UserPublicKey owner, byte[] encodedWritingPublicKey, byte[] writingKeySignedMapKeyPlusBlob) {
UserPublicKey writingKey = new UserPublicKey(encodedWritingPublicKey);
try {
byte[] payload = writingKey.unsignMessage(writingKeySignedMapKeyPlusBlob);
byte[] mapKey = Arrays.copyOfRange(payload, 0, 32);
byte[] metadataBlob =
Arrays.copyOfRange(
payload,
32,
payload
.length); // will be zero length for now // TODO change to the current blob hash
MetadataBlob blob = new MetadataBlob(writingKey.getPublicKeys(), mapKey, metadataBlob);
return blob.delete();
} catch (TweetNaCl.InvalidSignatureException e) {
System.err.println(
"Invalid signature during removeMetadataBlob for owner: "
+ owner
+ " and sharer: "
+ writingKey);
return false;
}
}
@Override
public boolean addUsername(
String username, byte[] encodedUserKey, byte[] signed, byte[] staticData) {
UserPublicKey key = new UserPublicKey(encodedUserKey);
if (!key.isValidSignature(
signed, ArrayOps.concat(username.getBytes(), encodedUserKey, staticData))) return false;
UserPublicKey existingKey = getPublicKey(username);
if (existingKey != null) return false;
String existingUsername = getUsername(key.getPublicKeys());
if (existingUsername.length() > 0) return false;
UserData user = new UserData(username, key.getPublicKeys());
return user.insert();
}
@Override
public byte[] getStaticData(UserPublicKey owner) {
byte[] dummy = null;
StaticData staticData = new StaticData(owner.getPublicKeys(), dummy);
RowData[] users = staticData.select();
if (users == null || users.length != 1) return null;
return users[0].data;
}
@Override
public boolean setStaticData(UserPublicKey owner, byte[] signedStaticData) {
try {
StaticData userData =
new StaticData(owner.getPublicKeys(), owner.unsignMessage(signedStaticData));
return userData.insert();
} catch (TweetNaCl.InvalidSignatureException e) {
System.err.println("Invalid signature setting static data for: " + owner);
return false;
}
}
@Override
public boolean setMetadataBlob(
UserPublicKey owner, byte[] encodedWritingPublicKey, byte[] writingKeySignedMapKey) {
UserPublicKey writingKey = new UserPublicKey(encodedWritingPublicKey);
try {
byte[] payload = writingKey.unsignMessage(writingKeySignedMapKey);
byte[] mapKey = Arrays.copyOfRange(payload, 0, 32);
byte[] metadataBlob = Arrays.copyOfRange(payload, 32, payload.length);
MetadataBlob blob = new MetadataBlob(writingKey.getPublicKeys(), mapKey, metadataBlob);
return blob.insert();
} catch (TweetNaCl.InvalidSignatureException e) {
System.err.println(
"Invalid signature during setMetadataBlob for owner: "
+ owner
+ " and sharer: "
+ writingKey);
return false;
}
}