X-Git-Url: https://mudpy.org/gitweb?a=blobdiff_plain;f=lib%2Fmudpy%2Fpassword.py;h=f6c1abc5562cf4a13b82660346361933e816b139;hb=83f8bcba73b08734089d91e75c49f6939d47d906;hp=bad5579e3557640b73a0e728c4b3e87b5e800409;hpb=c817b9432d6ac5512dc86a266ac033d3078fcdcc;p=mudpy.git

diff --git a/lib/mudpy/password.py b/lib/mudpy/password.py
index bad5579..f6c1abc 100644
--- a/lib/mudpy/password.py
+++ b/lib/mudpy/password.py
@@ -1,10 +1,17 @@
 # -*- coding: utf-8 -*-
 """Password hashing functions and constants for the mudpy engine."""
 
-# Copyright (c) 2004-2013 Jeremy Stanley <fungi@yuggoth.org>. Permission
+# Copyright (c) 2004-2014 Jeremy Stanley <fungi@yuggoth.org>. Permission
 # to use, copy, modify, and distribute this software is granted under
 # terms provided in the LICENSE file distributed with this software.
 
+import base64
+import hashlib
+import math
+import random
+import re
+import struct
+
 # convenience constants for indexing the supported hashing algorithms,
 # guaranteed a stable part of the interface
 MD5 = 0  # hashlib.md5
@@ -20,7 +27,6 @@ def _pack_bytes(numbers):
     This is a wrapper around struct.pack, used to turn a list of integers
     between 0 and 255 into a packed sequence akin to a C-style string.
     """
-    import struct
     packed = b""
     for number in numbers:
         number = int(number)
@@ -34,7 +40,6 @@ def _bytes_to_text(byte_sequence):
     This is a wrapper around base64.b64encode with preferences
     appropriate for encoding Unix-style passwd hash strings.
     """
-    import base64
     return base64.b64encode(
         byte_sequence,
         b"./"
@@ -50,8 +55,6 @@ def _generate_salt(salt_len=2):
     need and discard any excess characters over the specified length.
     This ensures full distribution over each character of the salt.
     """
-    import math
-    import random
     salt = []
     for i in range(int(math.ceil(salt_len * 0.75))):
         salt.append(random.randint(0, 255))
@@ -66,7 +69,6 @@ def upgrade_legacy_hash(legacy_hash, salt, sep="$"):
     facets to this function, a conforming new-style password hash will be
     returned.
     """
-    import re
     assert re.match("^[0-9a-f]{32}$",
                     legacy_hash), "Not a valid MD5 hexdigest"
     collapsed = b""
@@ -126,7 +128,6 @@ def create(
 
        create(password, algorithm=SHA256, rounds=12, salt_len=16)
     """
-    import hashlib
 
     # if a specific salt wasn't specified, we need to generate one
     if not salt:
@@ -162,11 +163,7 @@ def create(
     # number of times
     for i in range(2 ** rounds):
         hashed = algorithms[algorithm](hashed.encode("utf-8")).digest()
-        # TODO: remove this check after the switch to py3k
-        try:
-            hashed = "".join(format(x, "02x") for x in bytes(hashed))
-        except ValueError:
-            hashed = "".join(format(ord(x), "02x") for x in bytes(hashed))
+        hashed = "".join(format(x, "02x") for x in bytes(hashed))
 
     # concatenate the output fields, coercing into text form as needed
     return "%s%s%s%s%s%s%s%s" % (
@@ -183,7 +180,6 @@ def verify(password, encoded_hash):
     comes out the same as the encoded_hash.
     """
     sep = encoded_hash[0]
-    import mudpy.misc
     algorithm, rounds, salt, hashed = encoded_hash.split(sep)[1:]
     if encoded_hash == create(
        password=password,