X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/python-afs.git/blobdiff_plain/2d2104b92ce4f472ade76c8fbb737b1c9028f8ea..a92dc43b602d9b3e37d96c11e9da9e543a330818:/afs/_pts.pyx diff --git a/afs/_pts.pyx b/afs/_pts.pyx index 49ee9b6..4a40bd0 100644 --- a/afs/_pts.pyx +++ b/afs/_pts.pyx @@ -1,24 +1,556 @@ -cdef extern from "afs/stds.h": - ctypedef long afs_int32 +from afs cimport * +from afs import pyafs_error -cdef extern from "ubik.h": +cdef import from "afs/ptuser.h": enum: - MAXSERVERS - - struct ubik_client: - pass + PR_MAXNAMELEN + PRGRP + PRUSERS + PRGROUPS + ANONYMOUSID + PR_SF_ALLBITS + PR_SF_NGROUPS + PR_SF_NUSERS -cdef extern from "rx/rx.h": - int rx_Init(int port) + ctypedef char prname[PR_MAXNAMELEN] + + struct namelist: + unsigned int namelist_len + prname *namelist_val + + struct prlist: + unsigned int prlist_len + afs_int32 *prlist_val + + struct idlist: + unsigned int idlist_len + afs_int32 *idlist_val + + struct prcheckentry: + 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 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 *) + int ubik_PR_INewEntry(ubik_client *, afs_int32, char *, afs_int32, afs_int32) + int ubik_PR_NewEntry(ubik_client *, afs_int32, char *, afs_int32, afs_int32, afs_int32 *) + int ubik_PR_Delete(ubik_client *, afs_int32, afs_int32) + int ubik_PR_AddToGroup(ubik_client *, afs_int32, afs_int32, afs_int32) + int ubik_PR_RemoveFromGroup(ubik_client *, afs_int32, afs_int32, afs_int32) + int ubik_PR_ListElements(ubik_client *, afs_int32, afs_int32, prlist *, afs_int32 *) + 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": + enum: + PRNOENT + PRTOOMANY + +cdef class PTEntry: + cdef public afs_int32 flags + cdef public afs_int32 id + 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: + if p_entry is None: + raise TypeError + return -1 + + p_entry.flags = c_entry.flags + p_entry.id = c_entry.id + 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: + if p_entry is None: + raise TypeError + return -1 + + c_entry.flags = p_entry.flags + c_entry.id = p_entry.id + 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 class PTS: + """ + A PTS object is essentially a handle to talk to the server in a + given cell. + + cell defaults to None. If no argument is passed for cell, PTS + connects to the home cell. + + sec is the security level, an integer from 0 to 3: + - 0: unauthenticated connection + - 1: try authenticated, then fall back to unauthenticated + - 2: fail if an authenticated connection can't be established + - 3: same as 2, plus encrypt all traffic to the protection + server + """ cdef ubik_client * client - - def __cinit__(self): + cdef readonly object cell + + def __cinit__(self, cell=None, sec=1): cdef afs_int32 code - + cdef afsconf_dir *cdir + cdef afsconf_cell info + cdef char * c_cell + cdef ktc_principal prin + cdef ktc_token token + cdef rx_securityClass *sc + cdef rx_connection *serverconns[MAXSERVERS] + cdef int i + + initialize_PT_error_table() + + if cell is None: + c_cell = NULL + else: + c_cell = cell + self.client = NULL - + code = rx_Init(0) if code != 0: - raise Exception(str(code)) + raise Exception(code, "Error initializing Rx") + + cdir = afsconf_Open(AFSDIR_CLIENT_ETC_DIRPATH) + if cdir is NULL: + raise OSError(errno, + "Error opening configuration directory (%s): %s" % \ + (AFSDIR_CLIENT_ETC_DIRPATH, strerror(errno))) + code = afsconf_GetCellInfo(cdir, c_cell, "afsprot", &info) + pyafs_error(code) + + self.cell = info.name + + if sec > 0: + strncpy(prin.cell, info.name, sizeof(prin.cell)) + prin.instance[0] = 0 + strncpy(prin.name, "afs", sizeof(prin.name)) + + code = ktc_GetToken(&prin, &token, sizeof(token), NULL); + if code != 0: + if sec >= 2: + # No really - we wanted authentication + pyafs_error(code) + sec = 0 + else: + if sec == 3: + level = rxkad_crypt + else: + level = rxkad_clear + sc = rxkad_NewClientSecurityObject(level, &token.sessionKey, + token.kvno, token.ticketLen, + token.ticket) + + if sec == 0: + sc = rxnull_NewClientSecurityObject() + else: + sec = 2 + + memset(serverconns, 0, sizeof(serverconns)) + for 0 <= i < info.numServers: + serverconns[i] = rx_NewConnection(info.hostAddr[i].sin_addr.s_addr, + info.hostAddr[i].sin_port, + PRSRV, + sc, + sec) + + code = ubik_ClientInit(serverconns, &self.client) + pyafs_error(code) + + code = rxs_Release(sc) + + def __dealloc__(self): + ubik_ClientDestroy(self.client) + rx_Finalize() + + 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, (str, unicode)): + 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 = ANONYMOUSID + name = name.lower() + + lids.idlist_len = 0 + lids.idlist_val = NULL + lnames.namelist_len = 1 + lnames.namelist_val = malloc(PR_MAXNAMELEN) + strncpy(lnames.namelist_val[0], name, PR_MAXNAMELEN) + code = ubik_PR_NameToID(self.client, 0, &lnames, &lids) + if lids.idlist_val is not NULL: + id = lids.idlist_val[0] + free(lids.idlist_val) + if id == ANONYMOUSID: + code = PRNOENT + pyafs_error(code) + return id + + def _IdToName(self, id): + """ + Convert an AFS ID to the name of a user or group. + """ + cdef namelist lnames + cdef idlist lids + cdef afs_int32 code + cdef char name[PR_MAXNAMELEN] + + lids.idlist_len = 1 + lids.idlist_val = malloc(sizeof(afs_int32)) + lids.idlist_val[0] = id + lnames.namelist_len = 0 + lnames.namelist_val = NULL + code = ubik_PR_IDToName(self.client, 0, &lids, &lnames) + if lnames.namelist_val is not NULL: + strncpy(name, lnames.namelist_val[0], sizeof(name)) + free(lnames.namelist_val) + if lids.idlist_val is not NULL: + free(lids.idlist_val) + if name == str(id): + code = PRNOENT + pyafs_error(code) + return name + + def _CreateUser(self, name, id=None): + """ + Create a new user in the protection database. If an ID is + provided, that one will be used. + """ + cdef afs_int32 code + cdef afs_int32 cid + name = name[:PR_MAXNAMELEN].lower() + + if id is not None: + cid = id + + if id is not None: + code = ubik_PR_INewEntry(self.client, 0, name, cid, 0) + else: + code = ubik_PR_NewEntry(self.client, 0, name, 0, 0, &cid) + + pyafs_error(code) + return cid + + 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._NameOrId(owner) + + if id is not None: + cid = id + code = ubik_PR_INewEntry(self.client, 0, name, cid, oid) + else: + code = ubik_PR_NewEntry(self.client, 0, name, PRGRP, oid, &cid) + + pyafs_error(code) + return cid + + def _Delete(self, ident): + """ + 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) + pyafs_error(code) + + def _AddToGroup(self, user, group): + """ + 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) + pyafs_error(code) + + def _RemoveFromGroup(self, user, group): + """ + 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) + pyafs_error(code) + + def _ListMembers(self, ident): + """ + Get the membership of an entity. + + If id is a group, this returns the users that are in that + group. + + If id is a user, this returns the list of groups that user is + on. + + This returns a list of PTS IDs. + """ + cdef afs_int32 code, over + cdef prlist alist + cdef int i + cdef object members = [] + + cdef afs_int32 id = self._NameOrId(ident) + + alist.prlist_len = 0 + alist.prlist_val = NULL + + code = ubik_PR_ListElements(self.client, 0, id, &alist, &over) + + if alist.prlist_val is not NULL: + for i in range(alist.prlist_len): + members.append(alist.prlist_val[i]) + free(alist.prlist_val) + + if over: + code = PRTOOMANY + pyafs_error(code) + + return members + + def _ListOwned(self, owner): + """ + Get all groups owned by an entity. + """ + cdef afs_int32 code, over + cdef prlist alist + cdef int i + cdef object owned = [] + + cdef afs_int32 oid = self._NameOrId(owner) + + alist.prlist_len = 0 + alist.prlist_val = NULL + + code = ubik_PR_ListOwned(self.client, 0, oid, &alist, &over) + + if alist.prlist_val is not NULL: + for i in range(alist.prlist_len): + owned.append(alist.prlist_val[i]) + free(alist.prlist_val) + + if over: + code = PRTOOMANY + pyafs_error(code) + + return owned + + def _ListEntry(self, ident): + """ + Load a PTEntry instance with information about the provided + 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) + pyafs_error(code) + + _ptentry_from_c(entry, ¢ry) + return entry + + def _ChangeEntry(self, ident, newname=None, newid=None, newoid=None): + """ + Change the name, ID, and/or owner of a PTS entity. + + For any of newname, newid, and newoid which aren't specified + or ar None, the value isn't changed. + """ + cdef afs_int32 code + 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) + c_newname = newname + if newid is not None: + c_newid = newid + if newoid is not None: + c_newoid = newoid + + code = ubik_PR_ChangeEntry(self.client, 0, id, c_newname, c_newoid, c_newid) + 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)