BigInteger bi = new BigInteger(bytesPart).modPow(_priKey.getPrivateExponent(), _priKey.getModulus());
baos.write(removeOneByte(bi.toByteArray()));
}
return baos.toByteArray();
} catch (Exception e) {
throw new DecodeException();
} finally {
IOHelper.closeQuietly(bais);
IOHelper.closeQuietly(baos);
IOHelper.closeQuietly(ois);
}