backup-checksums.py

#!/usr/bin/env python
import hashlib
import os
import sys
import csv
 
# Set the directory you want to start from
rootDir = sys.argv[1]
BLOCKSIZE = 65536
csv_filename = "checksums.csv"
csvfile = open(os.path.join(sys.argv[1], csv_filename), 'w')
csv_fields = ['filename', 'md5', 'sha1']
csvwriter = csv.DictWriter(csvfile, delimiter='|', fieldnames=csv_fields)
csvwriter.writerow(dict((fn,fn) for fn in csv_fields))

for dirName, subdirList, fileList in os.walk(rootDir):
    print('Found directory: %s' % dirName)
    fileList.sort()
    for fname in fileList:
        print('\t%s' % fname)
	if fname != csv_filename:
		hasher1 = hashlib.md5()
		hasher2 = hashlib.sha1()
		with open(os.path.join(dirName, fname), 'rb') as afile:
		    buf = afile.read(BLOCKSIZE)
		    while len(buf) > 0:
		        hasher1.update(buf)
			hasher2.update(buf)
	        	buf = afile.read(BLOCKSIZE)
		md5 = hasher1.hexdigest()
		sha1 = hasher2.hexdigest()
		file_row = {'filename': fname, 'md5': md5, 'sha1': sha1}
		csvwriter.writerow(file_row)
csvfile.close()