X-Git-Url: https://snippets.scripts.mit.edu/gitweb.cgi/Scripts/git/.git/blobdiff_plain/606f938b9ef581e7becb21e7e7dd738bcca6e316..refs/heads/master:/django/mit/__init__.py

diff --git a/django/mit/__init__.py b/django/mit/__init__.py
index 4757fdd..4d09313 100644
--- a/django/mit/__init__.py
+++ b/django/mit/__init__.py
@@ -1,19 +1,151 @@
+import os
+import subprocess
+import tempfile
+import ldap
+import ldap.filter
+
+from django.contrib.auth.backends import RemoteUserBackend
 from django.contrib.auth.middleware import RemoteUserMiddleware
+from django.contrib.auth.views import login
+from django.contrib.auth import REDIRECT_FIELD_NAME
+from django.http import HttpResponseRedirect
+from django.contrib import auth
+from django.core.exceptions import ObjectDoesNotExist
+from django.core.validators import URLValidator, ValidationError
+
+from django.conf import settings
+
+def zephyr(msg, clas='message', instance='log', rcpt='nobody',):
+    proc = subprocess.Popen(
+        ['zwrite', '-d', '-n', '-c', clas, '-i', instance, rcpt, ],
+        stdin=subprocess.PIPE, stdout=subprocess.PIPE
+    )
+    proc.communicate(msg)
+
+def UrlOrAfsValidator(value):
+    if value.startswith('/mit/') or value.startswith('/afs/'):
+        return
+    else:
+        try:
+            URLValidator()(value)
+        except ValidationError:
+            raise ValidationError('Provide a valid URL or AFS path')
+
+def pag_check_helper(fn, args, aklog=False, ccname=None, **kwargs):
+    if 'executable' in kwargs:
+        raise ValueError('"executable" not supported with pag_check_*')
+
+    env = None
+    if 'env' in kwargs:
+        env = kwargs['env']
+        del kwargs['env']
+    if ccname:
+        if env is not None:
+            env = dict(env)
+        else:
+            env = dict(os.environ)
+        env['KRB5CCNAME'] = ccname
+
+    pagsh_cmd = 'exec "$@"'
+    if aklog: pagsh_cmd = "aklog && " + pagsh_cmd
+    args = ['pagsh', '-c', pagsh_cmd, 'exec', ] + args
 
-def zephyr(msg, clas='remit', instance='log', rcpt='adehnert',):
-    import os
-    os.system("zwrite -d -c '%s' -i '%s' '%s' -m '%s'" % (clas, instance, rcpt, msg, ))
+    return fn(args, env=env, **kwargs)
+
+def pag_check_call(args, **kwargs):
+    return pag_check_helper(subprocess.check_call, args, **kwargs)
+def pag_check_output(args, **kwargs):
+    return pag_check_helper(subprocess.check_output, args, **kwargs)
+
+def kinit(keytab=None, principal=None, autodelete=True, ):
+    if not keytab:
+        keytab = settings.KRB_KEYTAB
+    if not principal:
+        principal = settings.KRB_PRINCIPAL
+    assert keytab and principal
+    fd = tempfile.NamedTemporaryFile(mode='rb', prefix="krb5cc_djmit_", delete=autodelete, )
+    env = dict(KRB5CCNAME=fd.name)
+    kinit_cmd = ['kinit', '-k', '-t', keytab, principal, ]
+    subprocess.check_call(kinit_cmd, env=env)
+    return fd
 
 class ScriptsRemoteUserMiddleware(RemoteUserMiddleware):
     header = 'SSL_CLIENT_S_DN_Email'
-    
-    def clean_username(username):
-        zephyr(username)
+
+class ScriptsRemoteUserBackend(RemoteUserBackend):
+    def clean_username(self, username, ):
         if '@' in username:
             name, domain = username.split('@')
             assert domain.upper() == 'MIT.EDU'
             return name
         else:
-            return name
+            return username
+    def configure_user(self, user, ):
+        username = user.username
+        user.set_unusable_password()
+        con = ldap.open('ldap-too.mit.edu')
+        con.simple_bind_s("", "")
+        dn = "dc=mit,dc=edu"
+        fields = ['cn', 'sn', 'givenName', 'mail', ]
+        userfilter = ldap.filter.filter_format('uid=%s', [username])
+        result = con.search_s('dc=mit,dc=edu', ldap.SCOPE_SUBTREE, userfilter, fields)
+        if len(result) == 1:
+            user.first_name = result[0][1]['givenName'][0]
+            user.last_name = result[0][1]['sn'][0]
+            try:
+                user.email = result[0][1]['mail'][0]
+            except KeyError:
+                user.email = username + '@mit.edu'
+            try:
+                user.groups.add(auth.models.Group.objects.get(name='mit'))
+            except ObjectDoesNotExist:
+                print "Failed to retrieve mit group"
+        else:
+            raise ValueError, ("Could not find user with username '%s' (filter '%s')"%(username, userfilter))
+        try:
+            user.groups.add(auth.models.Group.objects.get(name='autocreated'))
+        except ObjectDoesNotExist:
+            print "Failed to retrieve autocreated group"
+        user.save()
+        return user
+
+def get_or_create_mit_user(username, ):
+    """
+    Given an MIT username, return a Django user object for them.
+    If necessary, create (and save) the Django user for them.
+    If the MIT user doesn't exist, raises ValueError.
+    """
+    user, created = auth.models.User.objects.get_or_create(username=username, )
+    if created:
+        backend = ScriptsRemoteUserBackend()
+        # Raises ValueError if the user doesn't exist
+        try:
+            return backend.configure_user(user), created
+        except ValueError:
+            user.delete()
+            raise
+    else:
+        return user, created
 
-zephyr('Defined ScriptsRUM')
+def scripts_login(request, **kwargs):
+    host = request.META['HTTP_HOST'].split(':')[0]
+    if host in ('localhost', '127.0.0.1'):
+        return login(request, **kwargs)
+    elif request.META['SERVER_PORT'] == '444':
+        if request.user.is_authenticated():
+            # They're already authenticated --- go ahead and redirect
+            if 'redirect_field_name' in kwargs:
+                redirect_field_name = kwargs['redirect_field_names']
+            else:
+                from django.contrib.auth import REDIRECT_FIELD_NAME
+                redirect_field_name = REDIRECT_FIELD_NAME
+            redirect_to = request.REQUEST.get(redirect_field_name, '')
+            if not redirect_to or '//' in redirect_to or ' ' in redirect_to:
+                redirect_to = settings.LOGIN_REDIRECT_URL
+            return HttpResponseRedirect(redirect_to)
+        else:
+            return login(request, **kwargs)
+    else:
+        # Move to port 444
+        redirect_to = "https://%s:444%s" % (host, request.META['REQUEST_URI'], )
+        return HttpResponseRedirect(redirect_to)