summaryrefslogtreecommitdiffstats
path: root/ipa-python/ipautil.py
diff options
context:
space:
mode:
authorKevin McCarthy <kmccarth@redhat.com>2007-09-04 13:44:59 -0700
committerKevin McCarthy <kmccarth@redhat.com>2007-09-04 13:44:59 -0700
commit3afd023c3aad0ade7ce391ba18dcd2c9c8e59426 (patch)
tree2f1b6a646e33f496d81aa80131d6b5ed44814055 /ipa-python/ipautil.py
parent584baa7ee21f22db6978efc89de1f1491768fab5 (diff)
downloadfreeipa-3afd023c3aad0ade7ce391ba18dcd2c9c8e59426.tar.gz
freeipa-3afd023c3aad0ade7ce391ba18dcd2c9c8e59426.tar.xz
freeipa-3afd023c3aad0ade7ce391ba18dcd2c9c8e59426.zip
Generalized Time parser and tests, for use in krbPasswordExpiration
Diffstat (limited to 'ipa-python/ipautil.py')
-rw-r--r--ipa-python/ipautil.py98
1 files changed, 98 insertions, 0 deletions
diff --git a/ipa-python/ipautil.py b/ipa-python/ipautil.py
index f6d62f7a3..2989b4211 100644
--- a/ipa-python/ipautil.py
+++ b/ipa-python/ipautil.py
@@ -30,6 +30,7 @@ import stat
from string import lower
import re
import xmlrpclib
+import datetime
def realm_to_suffix(realm_name):
s = realm_name.split(".")
@@ -233,3 +234,100 @@ def unwrap_binary_data(data):
else:
return data
+class GeneralizedTimeZone(datetime.tzinfo):
+ """This class is a basic timezone wrapper for the offset specified
+ in a Generalized Time. It is dst-ignorant."""
+ def __init__(self,offsetstr="Z"):
+ super(GeneralizedTimeZone, self).__init__()
+
+ self.name = offsetstr
+ self.houroffset = 0
+ self.minoffset = 0
+
+ if offsetstr == "Z":
+ self.houroffset = 0
+ self.minoffset = 0
+ else:
+ if (len(offsetstr) >= 3) and re.match(r'[-+]\d\d', offsetstr):
+ self.houroffset = int(offsetstr[0:3])
+ offsetstr = offsetstr[3:]
+ if (len(offsetstr) >= 2) and re.match(r'\d\d', offsetstr):
+ self.minoffset = int(offsetstr[0:2])
+ offsetstr = offsetstr[2:]
+ if len(offsetstr) > 0:
+ raise ValueError()
+ if self.houroffset < 0:
+ self.minoffset *= -1
+
+ def utcoffset(self, dt):
+ return datetime.timedelta(hours=self.houroffset, minutes=self.minoffset)
+
+ def dst(self, dt):
+ return datetime.timedelta(0)
+
+ def tzname(self, dt):
+ return self.name
+
+
+def parse_generalized_time(timestr):
+ """Parses are Generalized Time string (as specified in X.680),
+ returning a datetime object. Generalized Times are stored inside
+ the krbPasswordExpiration attribute in LDAP.
+
+ This method doesn't attempt to be perfect wrt timezones. If python
+ can't be bothered to implement them, how can we..."""
+
+ if len(timestr) < 8:
+ return None
+ try:
+ date = timestr[:8]
+ time = timestr[8:]
+
+ year = int(date[:4])
+ month = int(date[4:6])
+ day = int(date[6:8])
+
+ hour = min = sec = msec = 0
+ tzone = None
+
+ if (len(time) >= 2) and re.match(r'\d', time[0]):
+ hour = int(time[:2])
+ time = time[2:]
+ if len(time) >= 2 and (time[0] == "," or time[0] == "."):
+ hour_fraction = "."
+ time = time[1:]
+ while (len(time) > 0) and re.match(r'\d', time[0]):
+ hour_fraction += time[0]
+ time = time[1:]
+ total_secs = int(float(hour_fraction) * 3600)
+ min, sec = divmod(total_secs, 60)
+
+ if (len(time) >= 2) and re.match(r'\d', time[0]):
+ min = int(time[:2])
+ time = time[2:]
+ if len(time) >= 2 and (time[0] == "," or time[0] == "."):
+ min_fraction = "."
+ time = time[1:]
+ while (len(time) > 0) and re.match(r'\d', time[0]):
+ min_fraction += time[0]
+ time = time[1:]
+ sec = int(float(min_fraction) * 60)
+
+ if (len(time) >= 2) and re.match(r'\d', time[0]):
+ sec = int(time[:2])
+ time = time[2:]
+ if len(time) >= 2 and (time[0] == "," or time[0] == "."):
+ sec_fraction = "."
+ time = time[1:]
+ while (len(time) > 0) and re.match(r'\d', time[0]):
+ sec_fraction += time[0]
+ time = time[1:]
+ msec = int(float(sec_fraction) * 1000000)
+
+ if (len(time) > 0):
+ tzone = GeneralizedTimeZone(time)
+
+ return datetime.datetime(year, month, day, hour, min, sec, msec, tzone)
+
+ except ValueError:
+ return None