checksum

I'm having a bit of a problem with the communication to an accelerometer sensor. The sensor puts out about 8000 readings/second continuously. The sensor is plugged in to a usb port with an adaper and shows up as com4. My problem is that I can't seem to pick out the sensor reading packets from the byte stream. The packets have the size of five bytes and have the following format: High nibble Low nibble Byte 1 checksum, id for packet start X high Byte 2 X mid X low Byte 3 Y high Y mid Byte 4 Y low Z high Byte 5 Y mid Y low X, y, z is the acceleration. In the documentation for the sensor it

In my app I have a requirement to generate an MD5 checksum for a file. Could you please tell me if there is any way in which this can be achieved? Thank you. hemu Convert the file content into string & use the below method: public static String getMD5EncryptedString(String encTarget){ MessageDigest mdEnc = null; try { mdEnc = MessageDigest.getInstance("MD5"); } catch (NoSuchAlgorithmException e) { System.out.println("Exception while encrypting to md5"); e.printStackTrace(); } // Encryption algorithm mdEnc.update(encTarget.getBytes(), 0, encTarget.length()); String md5 = new BigInteger(1, mdEnc

How do I use the SHA1CryptoServiceProvider() on a file to create a SHA1 Checksum of the file? using (FileStream fs = new FileStream(@"C:\file\location", FileMode.Open)) using (BufferedStream bs = new BufferedStream(fs)) { using (SHA1Managed sha1 = new SHA1Managed()) { byte[] hash = sha1.ComputeHash(bs); StringBuilder formatted = new StringBuilder(2 * hash.Length); foreach (byte b in hash) { formatted.AppendFormat("{0:X2}", b); } } } formatted contains the string representation of the SHA-1 hash. Also, by using a FileStream instead of a byte buffer, ComputeHash computes the hash in chunks, so

I have to sync large files across some machines. The files can be up to 6GB in size. The sync will be done manually every few weeks. I cant take the filename into consideration because they can change anytime. My plan is to create checksums on the destination PC and on the source PC and than copy all files with a checksum, which are not already in the destination, to the destination. My first attempt was something like this: using System.IO; using System.Security.Cryptography; private static string GetChecksum(string file) { using (FileStream stream = File.OpenRead(file)) { SHA256Managed sha =

Is there any simple way of generating (and checking) MD5 checksums of a list of files in Python? (I have a small program I'm working on, and I'd like to confirm the checksums of the files). quantumSoup You can use hashlib.md5() Note that sometimes you won't be able to fit the whole file in memory. In that case, you'll have to read chunks of 4096 bytes sequentially and feed them to the Md5 function: def md5(fname): hash_md5 = hashlib.md5() with open(fname, "rb") as f: for chunk in iter(lambda: f.read(4096), b""): hash_md5.update(chunk) return hash_md5.hexdigest() Note: hash_md5.hexdigest() will