Got it. The Windows file system is behaving differently depending on the architecture of your process. This article explains it all – in particular: But what about 32-bit applications that have the system path hard coded and is running in a 64-bit Windows? How can they find the new SysWOW64 folder without changes in the … Read more
You need to read the file in chunks of suitable size: def md5_for_file(f, block_size=2**20): md5 = hashlib.md5() while True: data = f.read(block_size) if not data: break md5.update(data) return md5.digest() NOTE: Make sure you open your file with the ‘rb’ to the open – otherwise you will get the wrong result. So to do the whole … Read more
No. MD5 is not encryption (though it may be used as part of some encryption algorithms), it is a one way hash function. Much of the original data is actually “lost” as part of the transformation. Think about this: An MD5 is always 128 bits long. That means that there are 2128 possible MD5 hashes. … Read more
I’ve heard Joseph’s Myers implementation is quite fast. Additionally, he has a lengthy article on Javascript optimization describing what he learned while writing his implementation. It’s a good read for anyone interested in performant javascript. http://www.webreference.com/programming/javascript/jkm3/ His MD5 implementation can be found here
You can do the following: Python 2.x import hashlib print hashlib.md5(“whatever your string is”).hexdigest() Python 3.x import hashlib print(hashlib.md5(“whatever your string is”.encode(‘utf-8′)).hexdigest()) However in this case you’re probably better off using this helpful Python module for interacting with the Flickr API: http://stuvel.eu/flickrapi … which will deal with the authentication for you. Official documentation of hashlib
It’s very simple using System.Security.Cryptography.MD5: using (var md5 = MD5.Create()) { using (var stream = File.OpenRead(filename)) { return md5.ComputeHash(stream); } } (I believe that actually the MD5 implementation used doesn’t need to be disposed, but I’d probably still do so anyway.) How you compare the results afterwards is up to you; you can convert the … Read more
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 method: import hashlib def md5(fname): hash_md5 = hashlib.md5() with open(fname, “rb”) as f: for chunk in iter(lambda: f.read(4096), b””): … Read more
There’s an input stream decorator, java.security.DigestInputStream, so that you can compute the digest while using the input stream as you normally would, instead of having to make an extra pass over the data. MessageDigest md = MessageDigest.getInstance(“MD5”); try (InputStream is = Files.newInputStream(Paths.get(“file.txt”)); DigestInputStream dis = new DigestInputStream(is, md)) { /* Read decorated stream (dis) to … Read more
The MessageDigest class can provide you with an instance of the MD5 digest. When working with strings and the crypto classes be sure to always specify the encoding you want the byte representation in. If you just use string.getBytes() it will use the platform default. (Not all platforms use the same defaults) import java.security.*; .. … Read more