processData method
Implementation
void processData(
Uint8List inp, int inOff, int inLen, Uint8List out, int outOff) {
if (outOff > (out.length - inLen)) {
throw ArgumentError('Output buffer too short');
}
chacha20.processBytes(inp, inOff, inLen, out, outOff);
_dataCount = incrementCount(_dataCount, inLen, DATA_LIMIT);
}