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from os import path, listdir
from hashlib import sha512, sha384, sha256, md5
from base64 import b64encode
import re
DIR = path.normpath(path.join(__file__, "..", ".."))
Yield each javascript and css file in the directory
def js_and_css_files():
for f in listdir(DIR):
if path.isfile(f) and (f.endswith(".js") or f.endswith(".css")):
yield f
URL-safe base64 encode a binary digest and strip any padding.
def format_digest(digest):
return b64encode(digest)
Generate an encoded sha512 URI.
def sha512_uri(content):
return "sha512-%s" % format_digest(sha512(content).digest())
Generate an encoded sha384 URI.
def sha384_uri(content):
return "sha384-%s" % format_digest(sha384(content).digest())
Generate an encoded sha256 URI.
def sha256_uri(content):
return "sha256-%s" % format_digest(sha256(content).digest())
Generate an encoded md5 digest URI.
def md5_uri(content):
return "md5-%s" % format_digest(md5(content).digest())
def main():
for file in js_and_css_files():
print("Listing hash values for %s" % file)
with open(file, "r") as content_file:
content =
print("\tSHA512 integrity: %s" % sha512_uri(content))
print("\tSHA384 integrity: %s" % sha384_uri(content))
print("\tSHA256 integrity: %s" % sha256_uri(content))
print("\tMD5 integrity: %s" % md5_uri(content))
if __name__ == "__main__":