python2.4 compatibility fix

Author: Ralf Schlatterbeck

roundup/anypy/hashlib_.py

@@ -4,8 +4,10 @@
 
 try:
     from hashlib import md5, sha1 # new in Python 2.5
+    shamodule = sha1
 except ImportError:
     from md5 import md5           # deprecated in Python 2.6
     from sha import sha as sha1   # deprecated in Python 2.6
+    import sha as shamodule
 
 # vim: ts=8 sts=4 sw=4 si

roundup/password.py

@@ -23,7 +23,7 @@
 
 import re, string, random
 from base64 import b64encode, b64decode
-from roundup.anypy.hashlib_ import md5, sha1
+from roundup.anypy.hashlib_ import md5, sha1, shamodule
 try:
     import crypt
 except ImportError:
@@ -59,10 +59,6 @@ def h64decode(data):
     #no m2crypto - make our own pbkdf2 function
     from struct import pack
     from hmac import HMAC
-    try:
-        from hashlib import sha1
-    except ImportError:
-        from sha import new as sha1
 
     def xor_bytes(left, right):
         "perform bitwise-xor of two byte-strings"
@@ -71,7 +67,7 @@ def xor_bytes(left, right):
     def _pbkdf2(password, salt, rounds, keylen):
         digest_size = 20 # sha1 generates 20-byte blocks
         total_blocks = int((keylen+digest_size-1)/digest_size)
-        hmac_template = HMAC(password, None, sha1)
+        hmac_template = HMAC(password, None, shamodule)
         out = _bempty
         for i in xrange(1, total_blocks+1):
             hmac = hmac_template.copy()