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Code Issues 32 Releases Wiki Activity

[1.4.x] Fixed #21138 -- Increased the performance of our PBKDF2 implementation.

Browse Source 
Thanks go to Michael Gebetsroither for pointing out this issue and help on
the patch.

Backport of 68540fe4df44492571bc610a0a043d3d02b3d320 from master.
This commit is contained in:
Florian Apolloner 2013-09-17 22:59:56 +02:00
parent 0317edf0c7
commit e2403db95a
1 changed files with 7 additions and 3 deletions
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10
django/utils/crypto.py
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@ -111,9 +111,8 @@ def _fast_hmac(key, msg, digest):
A trimmed down version of Python's HMAC implementation
"""
dig1, dig2 = digest(), digest()
if len(key) > dig1.block_size:
key = digest(key).digest()
key += chr(0) * (dig1.block_size - len(key))
if len(key) != dig1.block_size:
raise ValueError('Key size needs to match the block_size of the digest.')
dig1.update(key.translate(_trans_36))
dig1.update(msg)
dig2.update(key.translate(_trans_5c))
@ -146,6 +145,11 @@ def pbkdf2(password, salt, iterations, dklen=0, digest=None):
hex_format_string = "%%0%ix" % (hlen * 2)
inner_digest_size = digest().block_size
if len(password) > inner_digest_size:
password = digest(password).digest()
password += b'\x00' * (inner_digest_size - len(password))
def F(i):
def U():
u = salt + struct.pack('>I', i)