I am wanting to generate and store a CRC (or similar) value for a given list of files which can be used as a comparison at a later point. Writing a function to do this is simple enough, but is there a more standard way to do it within the Python libs? The value generated does not need to be of any particular standard. ...
I have used hashlib (which replaces md5 in Python 2.6/3.0) and it worked fine if I opened a file and put its content in hashlib.md5 function. The problem is with very big files that their sizes could exceed RAM size. How to get a MD5 hash of a file without open it? ...
I am getting different message digests from the linux 'sha512sum' tool and the python hashlib library. Here is what I get on my Ubuntu 8.10: $ echo test | sha512sum 0e3e75234abc68f4378a86b3f4b32a198ba301845b0cd6e50106e874345700cc6663a86c1ea125dc5e92be17c98f9a0f85ca9d5f595db2012f7cc3571945c123 - $ python Python 2.5.2 (r252:60911, Oct ...
Hi all. python 2.6 reports that the md5 module is obsolete and hashlib should be used. If I change import md5 to import hashlib I will solve for python 2.5 and python 2.6, but not for python 2.4, which has no hashlib module (leading to a ImportError, which I can catch). Now, to fix it, I could do a try/catch, and define a getMd5() func...
hi, i need to transfer large files across network and need to create checksum for them on hourly basis. so the speed for generating checksum is critical for me. somehow i can't make zlib.crc32 and zlib.adler32 working with files larger than 4GB on Windows XP Pro 64bit machine. i suspect i've hit the 32bit limitation here? using hashlib...
I'd like to create a hashlib instance, update() it, then persist its state in some way. Later, I'd like to recreate the object using this state data, and continue to update() it. Finally, I'd like to get the hexdigest() o the total cumulative run of data. State persistence has to survive across multiple runs. Example: import hashlib m ...
The hashlib Python module provides the following hash algorithms constructors: md5(), sha1(), sha224(), sha256(), sha384(), and sha512(). Assuming I don't want to use md5, is there a big difference in using, say, sha1 instead of sha512? I want to use something like hashlib.shaXXX(hashString).hexdigest(), but as it's just for caching, I'...
Hello, I am trying to understand this simple hashlib code in Python that has been given to me the other day on Stackoverflow: import hashlib m = hashlib.md5() m.update("Nobody inspects") m.update(" the spammish repetition here") m.digest() '\xbbd\x9c\x83\xdd\x1e\xa5\xc9\xd9\xde\xc9\xa1\x8d\xf0\xff\xe9' m.digest_size 16 m.block_size 64 ...
I've got a rather strange problem. For a Distributed Hash Table I need to be able to do some simple math operations on MD5 hashes. These include a sum (numeric sum represented by the hash) and a modulo operation. Now I'm wondering what the best way to implement these operations is. I'm using hashlib to calculate the hashes, but since the...
Hi folks, I have been looking through ths hashlib documentation but haven't found anything talking about using salt when hashing data. Help would be great. ...
So I have some code: signature = hmac.new( key=AWS_SECRET_ACCESS_KEY, msg=string_to_sign, digestmod=hashlib.sha256).digest() That runs perfectly on my own computer (has python 2.6.1). However, when I run this code on my server (Python 2.4.3) I get the following: /home/MYUSERNAME/public_html/Foo.com/cgi-bin/foo.py 66 ...
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). ...
I've got a generated MD5-hash, which I would like to compare to another MD5-hash from a string. The statement below is false, even though they look the same when you print them and should be true. hashlib.md5("foo").hexdigest() == "acbd18db4cc2f85cedef654fccc4a4d8" Google told me that I should encode the result from hexdigest(), since...