X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/python-afs.git/blobdiff_plain/5ffca44435afa544e8adf6c58b6a158c1f88156d..d5982bd765cfe8e1e9497dc041674a66589c9eec:/afs/_pts.pyx diff --git a/afs/_pts.pyx b/afs/_pts.pyx index e9e8648..3c10b70 100644 --- a/afs/_pts.pyx +++ b/afs/_pts.pyx @@ -1,10 +1,17 @@ -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 + PRUSERS + PRGROUPS ANONYMOUSID + PR_SF_ALLBITS + PR_SF_NGROUPS + PR_SF_NUSERS ctypedef char prname[PR_MAXNAMELEN] @@ -26,7 +33,23 @@ cdef import from "afs/ptuser.h": afs_int32 owner afs_int32 creator afs_int32 ngroups + afs_int32 nusers afs_int32 count + char name[PR_MAXNAMELEN] + + struct prlistentries: + afs_int32 flags + afs_int32 id + afs_int32 owner + afs_int32 creator + afs_int32 ngroups + afs_int32 nusers + afs_int32 count + char name[PR_MAXNAMELEN] + + struct prentries: + unsigned int prentries_len + prlistentries *prentries_val int ubik_PR_NameToID(ubik_client *, afs_int32, namelist *, idlist *) int ubik_PR_IDToName(ubik_client *, afs_int32, idlist *, namelist *) @@ -39,13 +62,36 @@ cdef import from "afs/ptuser.h": int ubik_PR_ListOwned(ubik_client *, afs_int32, afs_int32, prlist *, afs_int32 *) int ubik_PR_ListEntry(ubik_client *, afs_int32, afs_int32, prcheckentry *) int ubik_PR_ChangeEntry(ubik_client *, afs_int32, afs_int32, char *, afs_int32, afs_int32) + int ubik_PR_IsAMemberOf(ubik_client *, afs_int32, afs_int32, afs_int32, afs_int32 *) + int ubik_PR_ListMax(ubik_client *, afs_int32, afs_int32 *, afs_int32 *) + int ubik_PR_SetMax(ubik_client *, afs_int32, afs_int32, afs_int32) + 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 @@ -53,9 +99,17 @@ cdef class PTEntry: cdef public afs_int32 owner cdef public afs_int32 creator cdef public afs_int32 ngroups + cdef public afs_int32 nusers cdef public afs_int32 count + cdef public object name + + def __repr__(self): + if self.name != '': + return '' % self.name + else: + return '' % self.id -cdef int _ptentry_from_c(PTEntry p_entry, prcheckentry c_entry) except -1: +cdef int _ptentry_from_c(PTEntry p_entry, prcheckentry * c_entry) except -1: if p_entry is None: raise TypeError return -1 @@ -65,7 +119,9 @@ cdef int _ptentry_from_c(PTEntry p_entry, prcheckentry c_entry) except -1: p_entry.owner = c_entry.owner p_entry.creator = c_entry.creator p_entry.ngroups = c_entry.ngroups + p_entry.nusers = c_entry.nusers p_entry.count = c_entry.count + p_entry.name = c_entry.name return 0 cdef int _ptentry_to_c(prcheckentry * c_entry, PTEntry p_entry) except -1: @@ -78,9 +134,33 @@ cdef int _ptentry_to_c(prcheckentry * c_entry, PTEntry p_entry) except -1: c_entry.owner = p_entry.owner c_entry.creator = p_entry.creator c_entry.ngroups = p_entry.ngroups + c_entry.nusers = p_entry.nusers c_entry.count = p_entry.count + strncpy(c_entry.name, p_entry.name, sizeof(c_entry.name)) return 0 +cdef object kname_re = re.compile(r'^([^.].*?)(? 0: strncpy(prin.cell, info.name, sizeof(prin.cell)) @@ -140,7 +236,7 @@ cdef class PTS: 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: @@ -165,8 +261,7 @@ cdef class PTS: 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) @@ -174,13 +269,24 @@ cdef class PTS: 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 @@ -194,11 +300,10 @@ cdef class PTS: 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. """ @@ -220,11 +325,10 @@ cdef class PTS: 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. @@ -241,11 +345,10 @@ cdef class PTS: 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. @@ -253,7 +356,7 @@ cdef class PTS: 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 @@ -261,49 +364,49 @@ cdef class PTS: 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. """ @@ -312,6 +415,8 @@ cdef class PTS: cdef int i cdef object members = [] + cdef afs_int32 id = self._NameOrId(ident) + alist.prlist_len = 0 alist.prlist_val = NULL @@ -322,14 +427,11 @@ cdef class PTS: 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. """ @@ -338,6 +440,8 @@ cdef class PTS: cdef int i cdef object owned = [] + cdef afs_int32 oid = self._NameOrId(owner) + alist.prlist_len = 0 alist.prlist_val = NULL @@ -348,30 +452,28 @@ cdef class PTS: 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, centry) + _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. @@ -382,8 +484,10 @@ cdef class PTS: 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 @@ -391,5 +495,202 @@ cdef class PTS: 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, user, group): + """ + 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) + pyafs_error(code) + + return bool(flag) + + 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) + pyafs_error(code) + + return (uid, gid) + + 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) + pyafs_error(code) + + 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) + pyafs_error(code) + + def _ListEntries(self, users=None, groups=None): + """ + Return a list of PTEntry instances representing all entries in + the PRDB. + + Returns just users by default, but can return just users, just + groups, or both. + """ + cdef afs_int32 code + cdef afs_int32 flag = 0, startindex = 0, nentries, nextstartindex + cdef prentries centries + cdef unsigned int i + + cdef object entries = [] + + if groups is None or users is True: + flag |= PRUSERS + if groups: + flag |= PRGROUPS + + while startindex != -1: + centries.prentries_val = NULL + centries.prentries_len = 0 + nextstartindex = -1 + + code = ubik_PR_ListEntries(self.client, 0, flag, startindex, ¢ries, &nextstartindex) + if centries.prentries_val is not NULL: + for i in range(centries.prentries_len): + e = PTEntry() + _ptentry_from_c(e, ¢ries.prentries_val[i]) + entries.append(e) + free(centries.prentries_val) + pyafs_error(code) + + startindex = nextstartindex + + return entries + + def _SetFields(self, ident, access=None, groups=None, users=None): + """ + Update the fields for an entry. + + Valid fields are the privacy flags (access), the group quota + (groups), or the "foreign user quota" (users), which doesn't + actually seem to do anything, but is included for + completeness. + """ + 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 + if groups is not None: + ngroups = groups + mask |= PR_SF_NGROUPS + if users is not None: + nusers = users + mask |= PR_SF_NGROUPS + + code = ubik_PR_SetFieldsEntry(self.client, 0, id, mask, flags, ngroups, nusers, 0, 0) + 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 = malloc(40) + k4_name[0] = '\0' + k4_inst = malloc(40) + k4_inst[0] = '\0' + k4_realm = 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)