private static Task<PreKeyRecord> generatePreKey(uint preKeyId)
{
return Task.Run(() =>
{
ECKeyPair keyPair = Curve.generateKeyPair();
PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
return record;
});
}
public void StorePreKey(uint preKeyId, PreKeyRecord record)
{
preKeyStore.StorePreKey(preKeyId, record);
}
/**
* Register an identity key, last resort key, signed prekey, and list of one time prekeys
* with the server.
*
* @param identityKey The client's long-term identity keypair.
* @param lastResortKey The client's "last resort" prekey.
* @param signedPreKey The client's signed prekey.
* @param oneTimePreKeys The client's list of one-time prekeys.
*
* @throws IOException
*/
public async Task<bool> setPreKeys(IdentityKey identityKey, PreKeyRecord lastResortKey,
SignedPreKeyRecord signedPreKey, IList<PreKeyRecord> oneTimePreKeys)
//throws IOException
{
await this.pushServiceSocket.registerPreKeys(identityKey, lastResortKey, signedPreKey, oneTimePreKeys);
return true;
}
public void StorePreKey(uint preKeyId, PreKeyRecord record)
{
conn.InsertOrReplace(new PreKeyRecordI() { PreKeyId = preKeyId, Record = record.serialize() });
}
public async Task<bool> registerPreKeys(IdentityKey identityKey,
PreKeyRecord lastResortKey,
SignedPreKeyRecord signedPreKey,
IList<PreKeyRecord> records)
//throws IOException
{
List<PreKeyEntity> entities = new List<PreKeyEntity>();
foreach (PreKeyRecord record in records)
{
PreKeyEntity entity = new PreKeyEntity(record.getId(),
record.getKeyPair().getPublicKey());
entities.Add(entity);
}
PreKeyEntity lastResortEntity = new PreKeyEntity(lastResortKey.getId(),
lastResortKey.getKeyPair().getPublicKey());
SignedPreKeyEntity signedPreKeyEntity = new SignedPreKeyEntity(signedPreKey.getId(),
signedPreKey.getKeyPair().getPublicKey(),
signedPreKey.getSignature());
await makeRequest(string.Format(PREKEY_PATH, ""), "PUT",
JsonUtil.toJson(new PreKeyState(entities, lastResortEntity,
signedPreKeyEntity, identityKey)));
return true;
}
public static Task<PreKeyRecord> generateLastResortKey()
{
return Task.Run(() =>
{
PreKeyStore preKeyStore = new TextSecurePreKeyStore(conn);
if (preKeyStore.ContainsPreKey(Medium.MAX_VALUE))
{
try
{
//return preKeyStore.loadPreKey(Medium.MAX_VALUE);
return preKeyStore.LoadPreKey(Medium.MAX_VALUE);
}
catch (InvalidKeyIdException e)
{
//Log.w("PreKeyUtil", e);
preKeyStore.RemovePreKey(Medium.MAX_VALUE);
}
}
ECKeyPair keyPair = Curve.generateKeyPair();
PreKeyRecord record = new PreKeyRecord(Medium.MAX_VALUE, keyPair);
preKeyStore.StorePreKey(Medium.MAX_VALUE, record);
return record;
});
}
public CryptoState()
{
identityKeyPair = KeyHelper.generateIdentityKeyPair();
registrationId = KeyHelper.generateRegistrationId(false);
lastResortKey = KeyHelper.generateLastResortPreKey();
signedPreKey = KeyHelper.generateSignedPreKey(identityKeyPair, 5);//normally generate 100, but for a demo, 1 will do
axolotlStore = new InMemoryAxolotlStore(identityKeyPair, registrationId);
axolotlStore.StoreSignedPreKey(signedPreKey.getId(), signedPreKey);
}