public static async Task<List<PreKeyRecord>> generatePreKeys()
{
PreKeyStore preKeyStore = new TextSecurePreKeyStore(conn);
List<PreKeyRecord> records = new List<PreKeyRecord>();
uint preKeyIdOffset = getNextPreKeyId();
for (uint i = 0; i < BATCH_SIZE; i++)
{
uint preKeyId = (preKeyIdOffset + i) % Medium.MAX_VALUE;
PreKeyRecord record = await generatePreKey(preKeyId);
preKeyStore.StorePreKey(preKeyId, record);
records.Add(record);
}
setNextPreKeyId((preKeyIdOffset + BATCH_SIZE + 1) % Medium.MAX_VALUE);
return records;
}
public static SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair)
{
try
{
SignedPreKeyStore signedPreKeyStore = new TextSecurePreKeyStore(conn);
uint signedPreKeyId = getNextSignedPreKeyId();
/*ECKeyPair keyPair = Curve.generateKeyPair();
byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
SignedPreKeyRecord record = new SignedPreKeyRecord(signedPreKeyId, KeyHelper.getTime(), keyPair, signature);*/
SignedPreKeyRecord record = generateSignedPreKey(identityKeyPair, signedPreKeyId);
signedPreKeyStore.StoreSignedPreKey(signedPreKeyId, record);
setNextSignedPreKeyId((signedPreKeyId + 1) % Medium.MAX_VALUE);
return record;
}
catch (InvalidKeyException e)
{
throw new Exception(e.Message);
}
}
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;
});
}