mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-09 16:34:44 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 17

[ sf.net patch # 1121611 ]

Browse source 
A new hashlib module to replace the md5 and sha modules.  It adds
support for additional secure hashes such as SHA-256 and SHA-512.  The
hashlib module uses OpenSSL for fast platform optimized
implementations of algorithms when available.  The old md5 and sha
modules still exist as wrappers around hashlib to preserve backwards
compatibility.
This commit is contained in:
Gregory P. Smith 2005-08-21 18:45:59 +00:00
parent 33a5f2af59
commit f21a5f7739
21 changed files with 2589 additions and 53 deletions
Download patch file Download diff file Expand all files Collapse all files

24
Lib/hmac.py
View file

@ -28,27 +28,33 @@ class HMAC:
key: key for the keyed hash object.
msg: Initial input for the hash, if provided.
digestmod: A module supporting PEP 247. Defaults to the md5 module.
digestmod: A module supporting PEP 247. *OR*
A hashlib constructor returning a new hash object.
Defaults to hashlib.md5.
"""
if key is _secret_backdoor_key: # cheap
return
if digestmod is None:
import md5
digestmod = md5
import hashlib
digestmod = hashlib.md5
self.digestmod = digestmod
self.outer = digestmod.new()
self.inner = digestmod.new()
self.digest_size = digestmod.digest_size
if callable(digestmod):
self.digest_cons = digestmod
else:
self.digest_cons = lambda d='': digestmod.new(d)
self.outer = self.digest_cons()
self.inner = self.digest_cons()
self.digest_size = self.inner.digest_size
blocksize = 64
ipad = "\x36" * blocksize
opad = "\x5C" * blocksize
if len(key) > blocksize:
key = digestmod.new(key).digest()
key = self.digest_cons(key).digest()
key = key + chr(0) * (blocksize - len(key))
self.outer.update(_strxor(key, opad))
@ -70,7 +76,7 @@ class HMAC:
An update to this copy won't affect the original object.
"""
other = HMAC(_secret_backdoor_key)
other.digestmod = self.digestmod
other.digest_cons = self.digest_cons
other.digest_size = self.digest_size
other.inner = self.inner.copy()
other.outer = self.outer.copy()