-from afs cimport *
+from afs._util cimport *
+from afs._util import pyafs_error
+import re
-cdef import from "afs/ptuser.h":
+cdef extern from "afs/ptuser.h":
enum:
PR_MAXNAMELEN
PRGRP
int ubik_PR_ListEntries(ubik_client *, afs_int32, afs_int32, afs_int32, prentries *, afs_int32 *)
int ubik_PR_SetFieldsEntry(ubik_client *, afs_int32, afs_int32, afs_int32, afs_int32, afs_int32, afs_int32, afs_int32, afs_int32)
-cdef import from "afs/pterror.h":
+cdef extern from "afs/pterror.h":
enum:
PRNOENT
- PRTOOMANY
- void initialize_PT_error_table()
+cdef extern from "krb5/krb5.h":
+ struct _krb5_context:
+ pass
+ struct krb5_principal_data:
+ pass
+
+ ctypedef _krb5_context * krb5_context
+ ctypedef krb5_principal_data * krb5_principal
+
+ ctypedef long krb5_int32
+ ctypedef krb5_int32 krb5_error_code
+ krb5_error_code krb5_init_context(krb5_context *)
+ krb5_error_code krb5_parse_name(krb5_context, char *, krb5_principal *)
+ krb5_error_code krb5_unparse_name(krb5_context, krb5_principal, char **)
+ krb5_error_code krb5_524_conv_principal(krb5_context, krb5_principal, char *, char *, char *)
+ krb5_error_code krb5_425_conv_principal(krb5_context, char *, char *, char *, krb5_principal *)
+ krb5_error_code krb5_get_host_realm(krb5_context, char *, char ***)
+ void krb5_free_host_realm(krb5_context, char **)
+ void krb5_free_principal(krb5_context, krb5_principal)
+ void krb5_free_context(krb5_context)
cdef class PTEntry:
cdef public afs_int32 flags
strncpy(c_entry.name, p_entry.name, sizeof(c_entry.name))
return 0
+cdef object kname_re = re.compile(r'^([^.].*?)(?<!\\)(?:\.(.*?))?(?<!\\)@([^@]*)$')
+
+cdef object kname_parse(fullname):
+ """Parse a krb4-style principal into a name, instance, and realm."""
+ cdef object re_match = kname_re.match(fullname)
+ if not re_match:
+ return None
+ else:
+ princ = re_match.groups()
+ return tuple([re.sub(r'\\(.)', r'\1', x) if x else x for x in princ])
+
+cdef object kname_unparse(name, inst, realm):
+ """Unparse a name, instance, and realm into a single krb4
+ principal string."""
+ name = re.sub('r([.\\@])', r'\\\1', name)
+ inst = re.sub('r([.\\@])', r'\\\1', inst)
+ realm = re.sub(r'([\\@])', r'\\\1', realm)
+ if inst:
+ return '%s.%s@%s' % (name, inst, realm)
+ else:
+ return '%s@%s' % (name, realm)
+
cdef class PTS:
"""
A PTS object is essentially a handle to talk to the server in a
- 2: fail if an authenticated connection can't be established
- 3: same as 2, plus encrypt all traffic to the protection
server
+
+ The realm attribute is the Kerberos realm against which this cell
+ authenticates.
"""
cdef ubik_client * client
+ cdef readonly object cell
+ cdef readonly object realm
def __cinit__(self, cell=None, sec=1):
cdef afs_int32 code
cdef afsconf_dir *cdir
cdef afsconf_cell info
+ cdef krb5_context context
+ cdef char ** hrealms = NULL
cdef char * c_cell
cdef ktc_principal prin
cdef ktc_token token
"Error opening configuration directory (%s): %s" % \
(AFSDIR_CLIENT_ETC_DIRPATH, strerror(errno)))
code = afsconf_GetCellInfo(cdir, c_cell, "afsprot", &info)
- if code != 0:
- raise Exception(code, "GetCellInfo: %s" % afs_error_message(code))
+ pyafs_error(code)
+
+ code = krb5_init_context(&context)
+ pyafs_error(code)
+ code = krb5_get_host_realm(context, info.hostName[0], &hrealms)
+ pyafs_error(code)
+ self.realm = hrealms[0]
+ krb5_free_host_realm(context, hrealms)
+ krb5_free_context(context)
+
+ self.cell = info.name
if sec > 0:
strncpy(prin.cell, info.name, sizeof(prin.cell))
if code != 0:
if sec >= 2:
# No really - we wanted authentication
- raise Exception(code, "Failed to get token for service AFS: %s" % afs_error_message(code))
+ pyafs_error(code)
sec = 0
else:
if sec == 3:
sec)
code = ubik_ClientInit(serverconns, &self.client)
- if code != 0:
- raise Exception("Failed to initialize ubik connection to Protection server: %s" % afs_error_message(code))
+ pyafs_error(code)
code = rxs_Release(sc)
ubik_ClientDestroy(self.client)
rx_Finalize()
- def NameToId(self, name):
+ def _NameOrId(self, ident):
+ """
+ Given an identifier, convert it to a PTS ID by looking up the
+ name if it's a string, or otherwise just converting it to an
+ integer.
+ """
+ if isinstance(ident, basestring):
+ return self._NameToId(ident)
+ else:
+ return int(ident)
+
+ def _NameToId(self, name):
"""
Converts a user or group to an AFS ID.
"""
cdef namelist lnames
cdef idlist lids
- cdef afs_int32 code, id
+ cdef afs_int32 code, id = ANONYMOUSID
name = name.lower()
lids.idlist_len = 0
free(lids.idlist_val)
if id == ANONYMOUSID:
code = PRNOENT
- if code != 0:
- raise Exception("Failed to lookup PTS name: %s" % afs_error_message(code))
+ pyafs_error(code)
return id
- def IdToName(self, id):
+ def _IdToName(self, id):
"""
Convert an AFS ID to the name of a user or group.
"""
free(lids.idlist_val)
if name == str(id):
code = PRNOENT
- if code != 0:
- raise Exception("Failed to lookup PTS ID: %s" % afs_error_message(code))
+ pyafs_error(code)
return name
- def CreateUser(self, name, id=None):
+ def _CreateUser(self, name, id=None):
"""
Create a new user in the protection database. If an ID is
provided, that one will be used.
else:
code = ubik_PR_NewEntry(self.client, 0, name, 0, 0, &cid)
- if code != 0:
- raise Exception("Failed to create user: %s" % afs_error_message(code))
+ pyafs_error(code)
return cid
- def CreateGroup(self, name, owner, id=None):
+ def _CreateGroup(self, name, owner, id=None):
"""
Create a new group in the protection database. If an ID is
provided, that one will be used.
cdef afs_int32 code, cid
name = name[:PR_MAXNAMELEN].lower()
- oid = self.NameToId(owner)
+ oid = self._NameOrId(owner)
if id is not None:
cid = id
else:
code = ubik_PR_NewEntry(self.client, 0, name, PRGRP, oid, &cid)
- if code != 0:
- raise Exception("Failed to create group: %s" % afs_error_message(code))
+ pyafs_error(code)
return cid
- def Delete(self, id):
+ def _Delete(self, ident):
"""
- Delete the protection database entry with the provided ID.
+ Delete the protection database entry with the provided
+ identifier.
"""
cdef afs_int32 code
+ cdef afs_int32 id = self._NameOrId(ident)
code = ubik_PR_Delete(self.client, 0, id)
- if code != 0:
- raise Exception("Failed to delete user: %s" % afs_error_message(code))
+ pyafs_error(code)
- def AddToGroup(self, uid, gid):
+ def _AddToGroup(self, user, group):
"""
- Add the user with the given ID to the group with the given ID.
+ Add the given user to the given group.
"""
cdef afs_int32 code
+ cdef afs_int32 uid = self._NameOrId(user), gid = self._NameOrId(group)
code = ubik_PR_AddToGroup(self.client, 0, uid, gid)
- if code != 0:
- raise Exception("Failed to add user to group: %s" % afs_error_message(code))
+ pyafs_error(code)
- def RemoveFromGroup(self, uid, gid):
+ def _RemoveFromGroup(self, user, group):
"""
- Remove the user with the given ID from the group with the given ID.
+ Remove the given user from the given group.
"""
cdef afs_int32 code
+ cdef afs_int32 uid = self._NameOrId(user), gid = self._NameOrId(group)
code = ubik_PR_RemoveFromGroup(self.client, 0, uid, gid)
- if code != 0:
- raise Exception("Failed to remove user from group: %s" % afs_error_message(code))
+ pyafs_error(code)
- def ListMembers(self, id):
+ def _ListMembers(self, ident):
"""
Get the membership of an entity.
- If id is a group ID, this returns the users that are in that
+ If id is a group, this returns the users that are in that
group.
- If id is a user ID, this returns the list of groups that user
- is on.
+ If id is a user, this returns the list of groups that user is
+ on.
This returns a list of PTS IDs.
"""
cdef int i
cdef object members = []
+ cdef afs_int32 id = self._NameOrId(ident)
+
alist.prlist_len = 0
alist.prlist_val = NULL
members.append(alist.prlist_val[i])
free(alist.prlist_val)
- if over:
- code = PRTOOMANY
- if code != 0:
- raise Exception("Failed to get group membership: %s" % afs_error_message(code))
+ pyafs_error(code)
return members
- def ListOwned(self, oid):
+ def _ListOwned(self, owner):
"""
Get all groups owned by an entity.
"""
cdef int i
cdef object owned = []
+ cdef afs_int32 oid = self._NameOrId(owner)
+
alist.prlist_len = 0
alist.prlist_val = NULL
owned.append(alist.prlist_val[i])
free(alist.prlist_val)
- if over:
- code = PRTOOMANY
- if code != 0:
- raise Exception("Failed to get owned entities: %s" % afs_error_message(code))
+ pyafs_error(code)
return owned
- def ListEntry(self, id):
+ def _ListEntry(self, ident):
"""
Load a PTEntry instance with information about the provided
- ID.
+ entity.
"""
cdef afs_int32 code
cdef prcheckentry centry
cdef object entry = PTEntry()
+ cdef afs_int32 id = self._NameOrId(ident)
+
code = ubik_PR_ListEntry(self.client, 0, id, ¢ry)
- if code != 0:
- raise Exception("Error getting entity info: %s" % afs_error_message(code))
+ pyafs_error(code)
_ptentry_from_c(entry, ¢ry)
return entry
- def ChangeEntry(self, id, newname=None, newid=None, newoid=None):
+ def _ChangeEntry(self, ident, newname=None, newid=None, newoid=None):
"""
Change the name, ID, and/or owner of a PTS entity.
cdef afs_int32 c_newid = 0, c_newoid = 0
cdef char * c_newname
+ cdef afs_int32 id = self._NameOrId(ident)
+
if newname is None:
- newname = self.IdToName(id)
+ newname = self._IdToName(id)
c_newname = newname
if newid is not None:
c_newid = newid
c_newoid = newoid
code = ubik_PR_ChangeEntry(self.client, 0, id, c_newname, c_newoid, c_newid)
- if code != 0:
- raise Exception("Error changing entity info: %s" % afs_error_message(code))
+ pyafs_error(code)
- def IsAMemberOf(self, uid, gid):
+ def _IsAMemberOf(self, user, group):
"""
- Return True if the given uid is a member of the given gid.
+ Return True if the given user is a member of the given group.
"""
cdef afs_int32 code
cdef afs_int32 flag
+ cdef afs_int32 uid = self._NameOrId(user), gid = self._NameOrId(group)
+
code = ubik_PR_IsAMemberOf(self.client, 0, uid, gid, &flag)
- if code != 0:
- raise Exception("Error testing membership: %s" % afs_error_message(code))
+ pyafs_error(code)
return bool(flag)
- def ListMax(self):
+ def _ListMax(self):
"""
Return a tuple of the maximum user ID and the maximum group
ID currently assigned.
cdef afs_int32 code, uid, gid
code = ubik_PR_ListMax(self.client, 0, &uid, &gid)
- if code != 0:
- raise Exception("Error looking up max uid/gid: %s" % afs_error_message(code))
+ pyafs_error(code)
return (uid, gid)
- def SetMaxUserId(self, id):
+ def _SetMaxUserId(self, id):
"""
Set the maximum currently assigned user ID (the next
automatically assigned UID will be id + 1)
cdef afs_int32 code
code = ubik_PR_SetMax(self.client, 0, id, 0)
- if code != 0:
- raise Exception("Error setting max uid: %s" % afs_error_message(code))
+ pyafs_error(code)
- def SetMaxGroupId(self, id):
+ def _SetMaxGroupId(self, id):
"""
Set the maximum currently assigned user ID (the next
automatically assigned UID will be id + 1)
cdef afs_int32 code
code = ubik_PR_SetMax(self.client, 0, id, PRGRP)
- if code != 0:
- raise Exception("Error setting max gid: %s" % afs_error_message(code))
+ pyafs_error(code)
- def ListEntries(self, users=None, groups=None):
+ def _ListEntries(self, users=None, groups=None):
"""
Return a list of PTEntry instances representing all entries in
the PRDB.
_ptentry_from_c(e, <prcheckentry *>¢ries.prentries_val[i])
entries.append(e)
free(centries.prentries_val)
- if code != 0:
- raise Exception("Unable to list entries: %s" % afs_error_message(code))
+ pyafs_error(code)
startindex = nextstartindex
return entries
- def SetFields(self, id, access=None, groups=None, users=None):
+ def _SetFields(self, ident, access=None, groups=None, users=None):
"""
Update the fields for an entry.
cdef afs_int32 code
cdef afs_int32 mask = 0, flags = 0, nusers = 0, ngroups = 0
+ cdef afs_int32 id = self._NameOrId(ident)
+
if access is not None:
flags = access
mask |= PR_SF_ALLBITS
mask |= PR_SF_NGROUPS
code = ubik_PR_SetFieldsEntry(self.client, 0, id, mask, flags, ngroups, nusers, 0, 0)
- if code != 0:
- raise Exception("Unable to set fields: %s" % afs_error_message(code))
+ pyafs_error(code)
+
+ def _AfsToKrb5(self, afs_name):
+ """Convert an AFS principal to a Kerberos v5 one."""
+ cdef krb5_context ctx = NULL
+ cdef krb5_principal princ = NULL
+ cdef krb5_error_code code = 0
+ cdef char * krb5_princ = NULL
+ cdef char *name = NULL, *inst = NULL, *realm = NULL
+ cdef object pname, pinst, prealm
+
+ if '@' in afs_name:
+ pname, prealm = afs_name.rsplit('@', 1)
+ prealm = prealm.upper()
+ krb4_name = '%s@%s' % (pname, prealm)
+ else:
+ krb4_name = '%s@%s' % (afs_name, self.realm)
+
+ pname, pinst, prealm = kname_parse(krb4_name)
+ if pname:
+ name = pname
+ if pinst:
+ inst = pinst
+ if prealm:
+ realm = prealm
+
+ code = krb5_init_context(&ctx)
+ try:
+ pyafs_error(code)
+
+ code = krb5_425_conv_principal(ctx, name, inst, realm, &princ)
+ try:
+ pyafs_error(code)
+
+ code = krb5_unparse_name(ctx, princ, &krb5_princ)
+ try:
+ pyafs_error(code)
+
+ return krb5_princ
+ finally:
+ if krb5_princ is not NULL:
+ free(krb5_princ)
+ finally:
+ if princ is not NULL:
+ krb5_free_principal(ctx, princ)
+ finally:
+ if ctx is not NULL:
+ krb5_free_context(ctx)
+
+ def _Krb5ToAfs(self, krb5_name):
+ """Convert a Kerberos v5 principal to an AFS one."""
+ cdef krb5_context ctx = NULL
+ cdef krb5_principal k5_princ = NULL
+ cdef char *k4_name, *k4_inst, *k4_realm
+ cdef object afs_princ
+ cdef object afs_name, afs_realm
+
+ k4_name = <char *>malloc(40)
+ k4_name[0] = '\0'
+ k4_inst = <char *>malloc(40)
+ k4_inst[0] = '\0'
+ k4_realm = <char *>malloc(40)
+ k4_realm[0] = '\0'
+
+ code = krb5_init_context(&ctx)
+ try:
+ pyafs_error(code)
+
+ code = krb5_parse_name(ctx, krb5_name, &k5_princ)
+ try:
+ pyafs_error(code)
+
+ code = krb5_524_conv_principal(ctx, k5_princ, k4_name, k4_inst, k4_realm)
+ pyafs_error(code)
+
+ afs_princ = kname_unparse(k4_name, k4_inst, k4_realm)
+ afs_name, afs_realm = afs_princ.rsplit('@', 1)
+
+ if k4_realm == self.realm:
+ return afs_name
+ else:
+ return '%s@%s' % (afs_name, afs_realm.lower())
+ finally:
+ if k5_princ is not NULL:
+ krb5_free_principal(ctx, k5_princ)
+ finally:
+ if ctx is not NULL:
+ krb5_free_context(ctx)
projects / invirt/packages/python-afs.git / blobdiff