@Override
protected void engineUpdate(byte[] input, int offset, int len) {
try {
ensureKeystoreOperationInitialized();
} catch (InvalidKeyException e) {
throw new ProviderException("Failed to reinitialize MAC", e);
}
byte[] output;
try {
output = mChunkedStreamer.update(input, offset, len);
} catch (KeyStoreException e) {
throw new ProviderException("Keystore operation failed", e);
}
if ((output != null) && (output.length != 0)) {
throw new ProviderException("Update operation unexpectedly produced output");
}
}
