mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-07-06 09:55:46 +00:00
d3475e71bc
The term "permitted list" is a better choice for the filtering logic applied. Reviewed-by: Peter Krempa <pkrempa@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
274 lines
9.4 KiB
Python
Executable File
274 lines
9.4 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
#
|
|
# Copyright (C) 2013-2019 Red Hat, Inc.
|
|
#
|
|
# This library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with this library. If not, see
|
|
# <http://www.gnu.org/licenses/>.
|
|
#
|
|
# This script validates that the driver implementation of any
|
|
# public APIs contain ACL checks.
|
|
#
|
|
# As the script reads each source file, it attempts to identify
|
|
# top level function names.
|
|
#
|
|
# When reading the body of the functions, it looks for anything
|
|
# that looks like an API called named XXXEnsureACL. It will
|
|
# validate that the XXX prefix matches the name of the function
|
|
# it occurs in.
|
|
#
|
|
# When it later finds the virDriverPtr table, for each entry
|
|
# point listed, it will validate if there was a previously
|
|
# detected EnsureACL call recorded.
|
|
#
|
|
|
|
import re
|
|
import sys
|
|
|
|
permitted = {
|
|
"connectClose": True,
|
|
"connectIsEncrypted": True,
|
|
"connectIsSecure": True,
|
|
"connectIsAlive": True,
|
|
"networkOpen": True,
|
|
"networkClose": True,
|
|
"nwfilterOpen": True,
|
|
"nwfilterClose": True,
|
|
"secretOpen": True,
|
|
"secretClose": True,
|
|
"storageOpen": True,
|
|
"storageClose": True,
|
|
"interfaceOpen": True,
|
|
"interfaceClose": True,
|
|
"connectURIProbe": True,
|
|
"localOnly": True,
|
|
"domainQemuAttach": True,
|
|
}
|
|
|
|
# XXX this vzDomainMigrateConfirm3Params looks
|
|
# bogus - determine why it doesn't have a valid
|
|
# ACL check.
|
|
implpermitted = {
|
|
"vzDomainMigrateConfirm3Params": True,
|
|
}
|
|
|
|
lastfile = None
|
|
|
|
|
|
def fixup_name(name):
|
|
name.replace("Nwfilter", "NWFilter")
|
|
name.replace("Pm", "PM")
|
|
name.replace("Scsi", "SCSI")
|
|
if name.endswith("Xml"):
|
|
name = name[:-3] + "XML"
|
|
elif name.endswith("Uri"):
|
|
name = name[:-3] + "URI"
|
|
elif name.endswith("Uuid"):
|
|
name = name[:-4] + "UUID"
|
|
elif name.endswith("Id"):
|
|
name = name[:-2] + "ID"
|
|
elif name.endswith("Mac"):
|
|
name = name[:-3] + "MAC"
|
|
elif name.endswith("Cpu"):
|
|
name = name[:-3] + "MAC"
|
|
elif name.endswith("Os"):
|
|
name = name[:-2] + "OS"
|
|
elif name.endswith("Nmi"):
|
|
name = name[:-3] + "NMI"
|
|
elif name.endswith("Fstrim"):
|
|
name = name[:-6] + "FSTrim"
|
|
elif name.endswith("Wwn"):
|
|
name = name[:-3] + "WWN"
|
|
|
|
return name
|
|
|
|
|
|
def name_to_ProcName(name):
|
|
elems = []
|
|
if "_" in name or name.lower() in ["open", "close"]:
|
|
elems = [n.lower().capitalize() for n in name.split("_")]
|
|
else:
|
|
elems = [name]
|
|
|
|
elems = [fixup_name(n) for n in elems]
|
|
procname = "".join(elems)
|
|
|
|
return procname[0:1].lower() + procname[1:]
|
|
|
|
|
|
proto = sys.argv[1]
|
|
|
|
filteredmap = {}
|
|
with open(proto, "r") as fh:
|
|
incomment = False
|
|
filtered = False
|
|
|
|
for line in fh:
|
|
if "/**" in line:
|
|
incomment = True
|
|
filtered = False
|
|
elif incomment:
|
|
if "* @aclfilter" in line:
|
|
filtered = True
|
|
elif filtered:
|
|
m = re.search(r'''REMOTE_PROC_(.*)\s+=\s*\d+''', line)
|
|
if m is not None:
|
|
api = name_to_ProcName(m.group(1))
|
|
# Event filtering is handled in daemon/remote.c
|
|
# instead of drivers
|
|
if "_EVENT_REGISTER" not in line:
|
|
filteredmap[api] = True
|
|
incomment = False
|
|
|
|
|
|
def process_file(filename):
|
|
brace = 0
|
|
maybefunc = None
|
|
intable = False
|
|
table = None
|
|
|
|
acls = {}
|
|
aclfilters = {}
|
|
errs = False
|
|
with open(filename, "r") as fh:
|
|
lineno = 0
|
|
for line in fh:
|
|
lineno = lineno + 1
|
|
if brace == 0:
|
|
# Looks for anything which appears to be a function
|
|
# body name. Doesn't matter if we pick up bogus stuff
|
|
# here, as long as we don't miss valid stuff
|
|
m = None
|
|
if "(" in line:
|
|
m = re.search(r'''\b(\w+)\(''', line)
|
|
if m is not None:
|
|
maybefunc = m.group(1)
|
|
elif brace > 0:
|
|
ensureacl = None
|
|
checkacl = None
|
|
stub = None
|
|
if "EnsureACL" in line:
|
|
ensureacl = re.search(r'''(\w+)EnsureACL''', line)
|
|
if "CheckACL" in line:
|
|
checkacl = re.search(r'''(\w+)CheckACL''', line)
|
|
if "(" in line:
|
|
stub = re.search(r'''\b(\w+)\(''', line)
|
|
if ensureacl is not None:
|
|
# Record the fact that maybefunc contains an
|
|
# ACL call, and make sure it is the right call!
|
|
func = ensureacl.group(1)
|
|
if func.startswith("vir"):
|
|
func = func[3:]
|
|
|
|
if maybefunc is None:
|
|
print("%s:%d Unexpected check '%s' outside function" %
|
|
(filename, lineno, func), file=sys.stderr)
|
|
errs = True
|
|
else:
|
|
if not maybefunc.lower().endswith(func.lower()):
|
|
print(("%s:%d Mismatch check 'vir%sEnsureACL'" +
|
|
"for function '%s'") %
|
|
(filename, lineno, func, maybefunc),
|
|
file=sys.stderr)
|
|
errs = True
|
|
acls[maybefunc] = True
|
|
elif checkacl:
|
|
# Record the fact that maybefunc contains an
|
|
# ACL filter call, and make sure it is the right call!
|
|
func = checkacl.group(1)
|
|
if func.startswith("vir"):
|
|
func = func[3:]
|
|
|
|
if maybefunc is None:
|
|
print("%s:%d Unexpected check '%s' outside function" %
|
|
(filename, lineno, func), file=sys.stderr)
|
|
errs = True
|
|
else:
|
|
if not maybefunc.lower().endswith(func.lower()):
|
|
print(("%s:%d Mismatch check 'vir%sCheckACL' " +
|
|
"for function '%s'") %
|
|
(filename, lineno, func, maybefunc),
|
|
file=sys.stderr)
|
|
errs = True
|
|
aclfilters[maybefunc] = True
|
|
elif stub:
|
|
# Handles case where we replaced an API with a new
|
|
# one which adds new parameters, and we're left with
|
|
# a simple stub calling the new API.
|
|
callfunc = stub.group(1)
|
|
if callfunc in acls:
|
|
acls[maybefunc] = True
|
|
|
|
if callfunc in aclfilters:
|
|
aclfilters[maybefunc] = True
|
|
|
|
# Pass the vir*DriverPtr tables and make sure that
|
|
# every func listed there, has an impl which calls
|
|
# an ACL function
|
|
if intable:
|
|
assign = None
|
|
if "=" in line:
|
|
assign = re.search(r'''\.(\w+)\s*=\s*(\w+),?''', line)
|
|
if "}" in line:
|
|
intable = False
|
|
table = None
|
|
elif assign is not None:
|
|
api = assign.group(1)
|
|
impl = assign.group(2)
|
|
|
|
if (impl != "NULL" and
|
|
api not in ["no", "name"] and
|
|
table != "virStateDriver"):
|
|
if (impl not in acls and
|
|
api not in permitted and
|
|
impl not in implpermitted):
|
|
print(("%s:%d Missing ACL check in " +
|
|
"function '%s' for '%s'") %
|
|
(filename, lineno, impl, api),
|
|
file=sys.stderr)
|
|
errs = True
|
|
|
|
if api in filteredmap and impl not in aclfilters:
|
|
print(("%s:%d Missing ACL filter in " +
|
|
"function '%s' for '%s'") %
|
|
(filename, lineno, impl, api),
|
|
file=sys.stderr)
|
|
errs = True
|
|
else:
|
|
m = None
|
|
if "Driver" in line:
|
|
m = re.search(r'''^(?:static\s+)?(vir(?:\w+)?Driver)\s+''',
|
|
line)
|
|
if m is not None:
|
|
name = m.group(1)
|
|
if name not in ["virNWFilterCallbackDriver",
|
|
"virNWFilterTechDriver",
|
|
"virDomainConfNWFilterDriver"]:
|
|
intable = True
|
|
table = name
|
|
|
|
if "{" in line:
|
|
brace = brace + 1
|
|
if "}" in line:
|
|
brace = brace - 1
|
|
|
|
return errs
|
|
|
|
|
|
status = 0
|
|
for filename in sys.argv[2:]:
|
|
if process_file(filename):
|
|
status = 1
|
|
|
|
sys.exit(status)
|