Mini Shell
"""
Encapsulate the different transports available to Salt.
This includes server side transport, for the ReqServer and the Publisher
"""
import asyncio
import binascii
import collections
import hashlib
import logging
import os
import pathlib
import shutil
import tornado.gen
import salt.crypt
import salt.master
import salt.payload
import salt.transport.frame
import salt.utils.channel
import salt.utils.event
import salt.utils.files
import salt.utils.minions
import salt.utils.platform
import salt.utils.stringutils
import salt.utils.verify
from salt.exceptions import SaltDeserializationError
from salt.utils.cache import CacheCli
try:
from M2Crypto import RSA
HAS_M2 = True
except ImportError:
HAS_M2 = False
try:
from Cryptodome.Cipher import PKCS1_OAEP
except ImportError:
from Crypto.Cipher import PKCS1_OAEP # nosec
log = logging.getLogger(__name__)
class ReqServerChannel:
"""
ReqServerChannel handles request/reply messages from ReqChannels.
"""
@classmethod
def factory(cls, opts, **kwargs):
if "master_uri" not in opts and "master_uri" in kwargs:
opts["master_uri"] = kwargs["master_uri"]
transport = salt.transport.request_server(opts, **kwargs)
return cls(opts, transport)
@classmethod
def compare_keys(cls, key1, key2):
"""
Normalize and compare two keys
Returns:
bool: ``True`` if the keys match, otherwise ``False``
"""
return salt.crypt.clean_key(key1) == salt.crypt.clean_key(key2)
def __init__(self, opts, transport):
self.opts = opts
self.transport = transport
self.event = salt.utils.event.get_master_event(
self.opts, self.opts["sock_dir"], listen=False
)
self.master_key = salt.crypt.MasterKeys(self.opts)
@property
def aes_key(self):
if self.opts.get("cluster_id", None):
return salt.master.SMaster.secrets["cluster_aes"]["secret"].value
return salt.master.SMaster.secrets["aes"]["secret"].value
def pre_fork(self, process_manager):
"""
Do anything necessary pre-fork. Since this is on the master side this will
primarily be bind and listen (or the equivalent for your network library)
"""
if hasattr(self.transport, "pre_fork"):
self.transport.pre_fork(process_manager)
def post_fork(self, payload_handler, io_loop):
"""
Do anything you need post-fork. This should handle all incoming payloads
and call payload_handler. You will also be passed io_loop, for all of your
asynchronous needs
"""
import salt.master
if self.opts["pub_server_niceness"] and not salt.utils.platform.is_windows():
log.info(
"setting Publish daemon niceness to %i",
self.opts["pub_server_niceness"],
)
os.nice(self.opts["pub_server_niceness"])
self.io_loop = io_loop
self.crypticle = salt.crypt.Crypticle(self.opts, self.aes_key)
# other things needed for _auth
# Create the event manager
self.event = salt.utils.event.get_master_event(
self.opts, self.opts["sock_dir"], listen=False
)
self.auto_key = salt.daemons.masterapi.AutoKey(self.opts)
# only create a con_cache-client if the con_cache is active
if self.opts["con_cache"]:
self.cache_cli = CacheCli(self.opts)
else:
self.cache_cli = False
# Make an minion checker object
self.ckminions = salt.utils.minions.CkMinions(self.opts)
self.master_key = salt.crypt.MasterKeys(self.opts)
self.payload_handler = payload_handler
if hasattr(self.transport, "post_fork"):
self.transport.post_fork(self.handle_message, io_loop)
@tornado.gen.coroutine
def handle_message(self, payload):
try:
payload = self._decode_payload(payload)
except Exception as exc: # pylint: disable=broad-except
exc_type = type(exc).__name__
if exc_type == "AuthenticationError":
log.debug(
"Minion failed to auth to master. Since the payload is "
"encrypted, it is not known which minion failed to "
"authenticate. It is likely that this is a transient "
"failure due to the master rotating its public key."
)
else:
log.error("Bad load from minion: %s: %s", exc_type, exc)
raise tornado.gen.Return("bad load")
# TODO helper functions to normalize payload?
if not isinstance(payload, dict) or not isinstance(payload.get("load"), dict):
log.error(
"payload and load must be a dict. Payload was: %s and load was %s",
payload,
payload.get("load"),
)
raise tornado.gen.Return("payload and load must be a dict")
try:
id_ = payload["load"].get("id", "")
if "\0" in id_:
log.error("Payload contains an id with a null byte: %s", payload)
raise tornado.gen.Return("bad load: id contains a null byte")
except TypeError:
log.error("Payload contains non-string id: %s", payload)
raise tornado.gen.Return(f"bad load: id {id_} is not a string")
version = 0
if "version" in payload:
version = payload["version"]
sign_messages = False
if version > 1:
sign_messages = True
# intercept the "_auth" commands, since the main daemon shouldn't know
# anything about our key auth
if payload["enc"] == "clear" and payload.get("load", {}).get("cmd") == "_auth":
raise tornado.gen.Return(self._auth(payload["load"], sign_messages))
nonce = None
if version > 1:
nonce = payload["load"].pop("nonce", None)
# TODO: test
try:
# Take the payload_handler function that was registered when we created the channel
# and call it, returning control to the caller until it completes
ret, req_opts = yield self.payload_handler(payload)
except Exception as e: # pylint: disable=broad-except
# always attempt to return an error to the minion
log.error("Some exception handling a payload from minion", exc_info=True)
raise tornado.gen.Return("Some exception handling minion payload")
req_fun = req_opts.get("fun", "send")
if req_fun == "send_clear":
raise tornado.gen.Return(ret)
elif req_fun == "send":
raise tornado.gen.Return(self.crypticle.dumps(ret, nonce))
elif req_fun == "send_private":
raise tornado.gen.Return(
self._encrypt_private(
ret,
req_opts["key"],
req_opts["tgt"],
nonce,
sign_messages,
),
)
log.error("Unknown req_fun %s", req_fun)
# always attempt to return an error to the minion
raise tornado.gen.Return("Server-side exception handling payload")
def _encrypt_private(self, ret, dictkey, target, nonce=None, sign_messages=True):
"""
The server equivalent of ReqChannel.crypted_transfer_decode_dictentry
"""
# encrypt with a specific AES key
if self.master_key.cluster_key:
pubfn = os.path.join(self.opts["cluster_pki_dir"], "minions", target)
else:
pubfn = os.path.join(self.opts["pki_dir"], "minions", target)
key = salt.crypt.Crypticle.generate_key_string()
pcrypt = salt.crypt.Crypticle(self.opts, key)
try:
pub = salt.crypt.PublicKey(pubfn)
except (ValueError, IndexError, TypeError):
return self.crypticle.dumps({})
except OSError:
log.error("AES key not found")
return {"error": "AES key not found"}
pret = {}
pret["key"] = pub.encrypt(key)
if ret is False:
ret = {}
if sign_messages:
if nonce is None:
return {"error": "Nonce not included in request"}
tosign = salt.payload.dumps(
{"key": pret["key"], "pillar": ret, "nonce": nonce}
)
signed_msg = {
"data": tosign,
"sig": salt.crypt.PrivateKey(self.master_key.rsa_path).sign(tosign),
}
pret[dictkey] = pcrypt.dumps(signed_msg)
else:
pret[dictkey] = pcrypt.dumps(ret)
return pret
def _clear_signed(self, load):
tosign = salt.payload.dumps(load)
return {
"enc": "clear",
"load": tosign,
"sig": salt.crypt.sign_message(self.master_key.rsa_path, tosign),
}
def _update_aes(self):
"""
Check to see if a fresh AES key is available and update the components
of the worker
"""
import salt.master
key = "aes"
if self.opts.get("cluster_id", None):
key = "cluster_aes"
if (
salt.master.SMaster.secrets[key]["secret"].value
!= self.crypticle.key_string
):
self.crypticle = salt.crypt.Crypticle(
self.opts, salt.master.SMaster.secrets[key]["secret"].value
)
return True
return False
def _decode_payload(self, payload):
# Sometimes msgpack deserialization of random bytes could be successful,
# so we need to ensure payload in good shape to process this function.
if (
not isinstance(payload, dict)
or "enc" not in payload
or "load" not in payload
):
raise SaltDeserializationError("bad load received on socket!")
# we need to decrypt it
if payload["enc"] == "aes":
try:
payload["load"] = self.crypticle.loads(payload["load"])
except salt.crypt.AuthenticationError:
if not self._update_aes():
raise
payload["load"] = self.crypticle.loads(payload["load"])
return payload
def _auth(self, load, sign_messages=False):
"""
Authenticate the client, use the sent public key to encrypt the AES key
which was generated at start up.
This method fires an event over the master event manager. The event is
tagged "auth" and returns a dict with information about the auth
event
- Verify that the key we are receiving matches the stored key
- Store the key if it is not there
- Make an RSA key with the pub key
- Encrypt the AES key as an encrypted salt.payload
- Package the return and return it
"""
import salt.master
if not salt.utils.verify.valid_id(self.opts, load["id"]):
log.info("Authentication request from invalid id %s", load["id"])
if sign_messages:
return self._clear_signed({"ret": False, "nonce": load["nonce"]})
else:
return {"enc": "clear", "load": {"ret": False}}
log.info("Authentication request from %s", load["id"])
# 0 is default which should be 'unlimited'
if self.opts["max_minions"] > 0:
# use the ConCache if enabled, else use the minion utils
if self.cache_cli:
minions = self.cache_cli.get_cached()
else:
minions = self.ckminions.connected_ids()
if len(minions) > 1000:
log.info(
"With large numbers of minions it is advised "
"to enable the ConCache with 'con_cache: True' "
"in the masters configuration file."
)
if not len(minions) <= self.opts["max_minions"]:
# we reject new minions, minions that are already
# connected must be allowed for the mine, highstate, etc.
if load["id"] not in minions:
log.info(
"Too many minions connected (max_minions=%s). "
"Rejecting connection from id %s",
self.opts["max_minions"],
load["id"],
)
eload = {
"result": False,
"act": "full",
"id": load["id"],
"pub": load["pub"],
}
if self.opts.get("auth_events") is True:
self.event.fire_event(
eload, salt.utils.event.tagify(prefix="auth")
)
if sign_messages:
return self._clear_signed(
{"ret": "full", "nonce": load["nonce"]}
)
else:
return {"enc": "clear", "load": {"ret": "full"}}
pki_dir = self.opts["pki_dir"]
if self.opts["cluster_id"]:
if self.opts["cluster_pki_dir"]:
pki_dir = self.opts["cluster_pki_dir"]
# Check if key is configured to be auto-rejected/signed
auto_reject = self.auto_key.check_autoreject(load["id"])
auto_sign = self.auto_key.check_autosign(
load["id"], load.get("autosign_grains", None)
)
pubfn = os.path.join(pki_dir, "minions", load["id"])
pubfn_pend = os.path.join(pki_dir, "minions_pre", load["id"])
pubfn_rejected = os.path.join(pki_dir, "minions_rejected", load["id"])
pubfn_denied = os.path.join(pki_dir, "minions_denied", load["id"])
if self.opts["open_mode"]:
# open mode is turned on, nuts to checks and overwrite whatever
# is there
pass
elif os.path.isfile(pubfn_rejected):
# The key has been rejected, don't place it in pending
log.info(
"Public key rejected for %s. Key is present in rejection key dir.",
load["id"],
)
eload = {"result": False, "id": load["id"], "pub": load["pub"]}
if self.opts.get("auth_events") is True:
self.event.fire_event(eload, salt.utils.event.tagify(prefix="auth"))
if sign_messages:
return self._clear_signed({"ret": False, "nonce": load["nonce"]})
else:
return {"enc": "clear", "load": {"ret": False}}
elif os.path.isfile(pubfn):
# The key has been accepted, check it
with salt.utils.files.fopen(pubfn, "r") as pubfn_handle:
if not self.compare_keys(pubfn_handle.read(), load["pub"]):
log.error(
"Authentication attempt from %s failed, the public "
"keys did not match. This may be an attempt to compromise "
"the Salt cluster.",
load["id"],
)
# put denied minion key into minions_denied
with salt.utils.files.fopen(pubfn_denied, "w+") as fp_:
fp_.write(load["pub"])
eload = {
"result": False,
"id": load["id"],
"act": "denied",
"pub": load["pub"],
}
if self.opts.get("auth_events") is True:
self.event.fire_event(
eload, salt.utils.event.tagify(prefix="auth")
)
if sign_messages:
return self._clear_signed(
{"ret": False, "nonce": load["nonce"]}
)
else:
return {"enc": "clear", "load": {"ret": False}}
elif not os.path.isfile(pubfn_pend):
# The key has not been accepted, this is a new minion
if os.path.isdir(pubfn_pend):
# The key path is a directory, error out
log.info("New public key %s is a directory", load["id"])
eload = {"result": False, "id": load["id"], "pub": load["pub"]}
if self.opts.get("auth_events") is True:
self.event.fire_event(eload, salt.utils.event.tagify(prefix="auth"))
if sign_messages:
return self._clear_signed({"ret": False, "nonce": load["nonce"]})
else:
return {"enc": "clear", "load": {"ret": False}}
if auto_reject:
key_path = pubfn_rejected
log.info(
"New public key for %s rejected via autoreject_file", load["id"]
)
key_act = "reject"
key_result = False
elif not auto_sign:
key_path = pubfn_pend
log.info("New public key for %s placed in pending", load["id"])
key_act = "pend"
key_result = True
else:
# The key is being automatically accepted, don't do anything
# here and let the auto accept logic below handle it.
key_path = None
if key_path is not None:
# Write the key to the appropriate location
with salt.utils.files.fopen(key_path, "w+") as fp_:
fp_.write(load["pub"])
eload = {
"result": key_result,
"act": key_act,
"id": load["id"],
"pub": load["pub"],
}
if self.opts.get("auth_events") is True:
self.event.fire_event(eload, salt.utils.event.tagify(prefix="auth"))
if sign_messages:
return self._clear_signed(
{"ret": key_result, "nonce": load["nonce"]}
)
else:
return {"enc": "clear", "load": {"ret": key_result}}
elif os.path.isfile(pubfn_pend):
# This key is in the pending dir and is awaiting acceptance
if auto_reject:
# We don't care if the keys match, this minion is being
# auto-rejected. Move the key file from the pending dir to the
# rejected dir.
try:
shutil.move(pubfn_pend, pubfn_rejected)
except OSError:
pass
log.info(
"Pending public key for %s rejected via autoreject_file",
load["id"],
)
eload = {
"result": False,
"act": "reject",
"id": load["id"],
"pub": load["pub"],
}
if self.opts.get("auth_events") is True:
self.event.fire_event(eload, salt.utils.event.tagify(prefix="auth"))
if sign_messages:
return self._clear_signed({"ret": False, "nonce": load["nonce"]})
else:
return {"enc": "clear", "load": {"ret": False}}
elif not auto_sign:
# This key is in the pending dir and is not being auto-signed.
# Check if the keys are the same and error out if this is the
# case. Otherwise log the fact that the minion is still
# pending.
with salt.utils.files.fopen(pubfn_pend, "r") as pubfn_handle:
if not self.compare_keys(pubfn_handle.read(), load["pub"]):
log.error(
"Authentication attempt from %s failed, the public "
"key in pending did not match. This may be an "
"attempt to compromise the Salt cluster.",
load["id"],
)
# put denied minion key into minions_denied
with salt.utils.files.fopen(pubfn_denied, "w+") as fp_:
fp_.write(load["pub"])
eload = {
"result": False,
"id": load["id"],
"act": "denied",
"pub": load["pub"],
}
if self.opts.get("auth_events") is True:
self.event.fire_event(
eload, salt.utils.event.tagify(prefix="auth")
)
if sign_messages:
return self._clear_signed(
{"ret": False, "nonce": load["nonce"]}
)
else:
return {"enc": "clear", "load": {"ret": False}}
else:
log.info(
"Authentication failed from host %s, the key is in "
"pending and needs to be accepted with salt-key "
"-a %s",
load["id"],
load["id"],
)
eload = {
"result": True,
"act": "pend",
"id": load["id"],
"pub": load["pub"],
}
if self.opts.get("auth_events") is True:
self.event.fire_event(
eload, salt.utils.event.tagify(prefix="auth")
)
if sign_messages:
return self._clear_signed(
{"ret": True, "nonce": load["nonce"]}
)
else:
return {"enc": "clear", "load": {"ret": True}}
else:
# This key is in pending and has been configured to be
# auto-signed. Check to see if it is the same key, and if
# so, pass on doing anything here, and let it get automatically
# accepted below.
with salt.utils.files.fopen(pubfn_pend, "r") as pubfn_handle:
if not self.compare_keys(pubfn_handle.read(), load["pub"]):
log.error(
"Authentication attempt from %s failed, the public "
"keys in pending did not match. This may be an "
"attempt to compromise the Salt cluster.",
load["id"],
)
# put denied minion key into minions_denied
with salt.utils.files.fopen(pubfn_denied, "w+") as fp_:
fp_.write(load["pub"])
eload = {"result": False, "id": load["id"], "pub": load["pub"]}
if self.opts.get("auth_events") is True:
self.event.fire_event(
eload, salt.utils.event.tagify(prefix="auth")
)
if sign_messages:
return self._clear_signed(
{"ret": False, "nonce": load["nonce"]}
)
else:
return {"enc": "clear", "load": {"ret": False}}
else:
os.remove(pubfn_pend)
else:
# Something happened that I have not accounted for, FAIL!
log.warning("Unaccounted for authentication failure")
eload = {"result": False, "id": load["id"], "pub": load["pub"]}
if self.opts.get("auth_events") is True:
self.event.fire_event(eload, salt.utils.event.tagify(prefix="auth"))
if sign_messages:
return self._clear_signed({"ret": False, "nonce": load["nonce"]})
else:
return {"enc": "clear", "load": {"ret": False}}
log.info("Authentication accepted from %s", load["id"])
# only write to disk if you are adding the file, and in open mode,
# which implies we accept any key from a minion.
if not os.path.isfile(pubfn) and not self.opts["open_mode"]:
with salt.utils.files.fopen(pubfn, "w+") as fp_:
fp_.write(load["pub"])
elif self.opts["open_mode"]:
disk_key = ""
if os.path.isfile(pubfn):
with salt.utils.files.fopen(pubfn, "r") as fp_:
disk_key = fp_.read()
if load["pub"] and load["pub"] != disk_key:
log.debug("Host key change detected in open mode.")
with salt.utils.files.fopen(pubfn, "w+") as fp_:
fp_.write(load["pub"])
elif not load["pub"]:
log.error("Public key is empty: %s", load["id"])
if sign_messages:
return self._clear_signed({"ret": False, "nonce": load["nonce"]})
else:
return {"enc": "clear", "load": {"ret": False}}
pub = None
# the con_cache is enabled, send the minion id to the cache
if self.cache_cli:
self.cache_cli.put_cache([load["id"]])
# The key payload may sometimes be corrupt when using auto-accept
# and an empty request comes in
try:
pub = salt.crypt.get_rsa_pub_key(pubfn)
except salt.crypt.InvalidKeyError as err:
log.error('Corrupt public key "%s": %s', pubfn, err)
if sign_messages:
return self._clear_signed({"ret": False, "nonce": load["nonce"]})
else:
return {"enc": "clear", "load": {"ret": False}}
if not HAS_M2:
cipher = PKCS1_OAEP.new(pub) # pylint: disable=used-before-assignment
ret = {
"enc": "pub",
"pub_key": self.master_key.get_pub_str(),
"publish_port": self.opts["publish_port"],
}
# sign the master's pubkey (if enabled) before it is
# sent to the minion that was just authenticated
if self.opts["master_sign_pubkey"]:
# append the pre-computed signature to the auth-reply
if self.master_key.pubkey_signature():
log.debug("Adding pubkey signature to auth-reply")
log.debug(self.master_key.pubkey_signature())
ret.update({"pub_sig": self.master_key.pubkey_signature()})
else:
# the master has its own signing-keypair, compute the master.pub's
# signature and append that to the auth-reply
# get the key_pass for the signing key
key_pass = salt.utils.sdb.sdb_get(
self.opts["signing_key_pass"], self.opts
)
log.debug("Signing master public key before sending")
pub_sign = salt.crypt.sign_message(
self.master_key.get_sign_paths()[1], ret["pub_key"], key_pass
)
ret.update({"pub_sig": binascii.b2a_base64(pub_sign)})
if not HAS_M2:
mcipher = PKCS1_OAEP.new(self.master_key.key)
if self.opts["auth_mode"] >= 2:
if "token" in load:
try:
if HAS_M2:
mtoken = self.master_key.key.private_decrypt(
load["token"], RSA.pkcs1_oaep_padding
)
else:
mtoken = mcipher.decrypt(load["token"])
aes = f"{self.aes_key}_|-{mtoken}"
except Exception: # pylint: disable=broad-except
# Token failed to decrypt, send back the salty bacon to
# support older minions
pass
else:
aes = self.aes_key
if HAS_M2:
ret["aes"] = pub.public_encrypt(aes, RSA.pkcs1_oaep_padding)
else:
ret["aes"] = cipher.encrypt(aes)
else:
if "token" in load:
try:
if HAS_M2:
mtoken = self.master_key.key.private_decrypt(
load["token"], RSA.pkcs1_oaep_padding
)
ret["token"] = pub.public_encrypt(
mtoken, RSA.pkcs1_oaep_padding
)
else:
mtoken = mcipher.decrypt(load["token"])
ret["token"] = cipher.encrypt(mtoken)
except Exception: # pylint: disable=broad-except
# Token failed to decrypt, send back the salty bacon to
# support older minions
pass
aes = self.aes_key
if HAS_M2:
ret["aes"] = pub.public_encrypt(aes, RSA.pkcs1_oaep_padding)
else:
ret["aes"] = cipher.encrypt(aes)
# Be aggressive about the signature
digest = salt.utils.stringutils.to_bytes(hashlib.sha256(aes).hexdigest())
ret["sig"] = salt.crypt.private_encrypt(self.master_key.key, digest)
eload = {"result": True, "act": "accept", "id": load["id"], "pub": load["pub"]}
if self.opts.get("auth_events") is True:
self.event.fire_event(eload, salt.utils.event.tagify(prefix="auth"))
if sign_messages:
ret["nonce"] = load["nonce"]
return self._clear_signed(ret)
return ret
def close(self):
self.transport.close()
if self.event is not None:
self.event.destroy()
class PubServerChannel:
"""
Factory class to create subscription channels to the master's Publisher
"""
@classmethod
def factory(cls, opts, **kwargs):
if "master_uri" not in opts and "master_uri" in kwargs:
opts["master_uri"] = kwargs["master_uri"]
presence_events = False
if opts.get("presence_events", False):
tcp_only = True
for transport, _ in salt.utils.channel.iter_transport_opts(opts):
if transport != "tcp":
tcp_only = False
if tcp_only:
# Only when the transport is TCP only, the presence events will
# be handled here. Otherwise, it will be handled in the
# 'Maintenance' process.
presence_events = True
transport = salt.transport.publish_server(opts, **kwargs)
return cls(opts, transport, presence_events=presence_events)
def __init__(self, opts, transport, presence_events=False):
self.opts = opts
self.ckminions = salt.utils.minions.CkMinions(self.opts)
self.transport = transport
self.aes_funcs = salt.master.AESFuncs(self.opts)
self.present = {}
self.presence_events = presence_events
self.event = salt.utils.event.get_event("master", opts=self.opts, listen=False)
@property
def aes_key(self):
if self.opts.get("cluster_id", None):
return salt.master.SMaster.secrets["cluster_aes"]["secret"].value
return salt.master.SMaster.secrets["aes"]["secret"].value
def __getstate__(self):
return {
"opts": self.opts,
"transport": self.transport,
"presence_events": self.presence_events,
}
def __setstate__(self, state):
self.opts = state["opts"]
self.state = state["presence_events"]
self.transport = state["transport"]
self.event = salt.utils.event.get_event("master", opts=self.opts, listen=False)
self.ckminions = salt.utils.minions.CkMinions(self.opts)
self.present = {}
self.master_key = salt.crypt.MasterKeys(self.opts)
def close(self):
self.transport.close()
if self.event is not None:
self.event.destroy()
self.event = None
if self.aes_funcs is not None:
self.aes_funcs.destroy()
self.aes_funcs = None
def pre_fork(self, process_manager, kwargs=None):
"""
Do anything necessary pre-fork. Since this is on the master side this will
primarily be used to create IPC channels and create our daemon process to
do the actual publishing
:param func process_manager: A ProcessManager, from salt.utils.process.ProcessManager
"""
if hasattr(self.transport, "publish_daemon"):
process_manager.add_process(self._publish_daemon, kwargs=kwargs)
def _publish_daemon(self, **kwargs):
if self.opts["pub_server_niceness"] and not salt.utils.platform.is_windows():
log.debug(
"setting Publish daemon niceness to %i",
self.opts["pub_server_niceness"],
)
os.nice(self.opts["pub_server_niceness"])
secrets = kwargs.get("secrets", None)
if secrets is not None:
salt.master.SMaster.secrets = secrets
self.master_key = salt.crypt.MasterKeys(self.opts)
self.transport.publish_daemon(
self.publish_payload, self.presence_callback, self.remove_presence_callback
)
def presence_callback(self, subscriber, msg):
if msg["enc"] != "aes":
# We only accept 'aes' encoded messages for 'id'
return
crypticle = salt.crypt.Crypticle(self.opts, self.aes_key)
load = crypticle.loads(msg["load"])
load = salt.transport.frame.decode_embedded_strs(load)
if not self.aes_funcs.verify_minion(load["id"], load["tok"]):
return
subscriber.id_ = load["id"]
self._add_client_present(subscriber)
def remove_presence_callback(self, subscriber):
self._remove_client_present(subscriber)
def _add_client_present(self, client):
id_ = client.id_
if id_ in self.present:
clients = self.present[id_]
clients.add(client)
else:
self.present[id_] = {client}
if self.presence_events:
data = {"new": [id_], "lost": []}
self.event.fire_event(
data, salt.utils.event.tagify("change", "presence")
)
data = {"present": list(self.present.keys())}
self.event.fire_event(
data, salt.utils.event.tagify("present", "presence")
)
def _remove_client_present(self, client):
id_ = client.id_
if id_ is None or id_ not in self.present:
# This is possible if _remove_client_present() is invoked
# before the minion's id is validated.
return
clients = self.present[id_]
if client not in clients:
# Since _remove_client_present() is potentially called from
# _stream_read() and/or publish_payload(), it is possible for
# it to be called twice, in which case we will get here.
# This is not an abnormal case, so no logging is required.
return
clients.remove(client)
if len(clients) == 0:
del self.present[id_]
if self.presence_events:
data = {"new": [], "lost": [id_]}
self.event.fire_event(
data, salt.utils.event.tagify("change", "presence")
)
data = {"present": list(self.present.keys())}
self.event.fire_event(
data, salt.utils.event.tagify("present", "presence")
)
async def publish_payload(self, load, *args):
load = salt.payload.loads(load)
unpacked_package = self.wrap_payload(load)
try:
payload = salt.payload.loads(unpacked_package["payload"])
except KeyError:
log.error("Invalid package %r", unpacked_package)
raise
payload = salt.payload.dumps(payload)
if "topic_lst" in unpacked_package:
topic_list = unpacked_package["topic_lst"]
ret = await self.transport.publish_payload(payload, topic_list)
else:
ret = await self.transport.publish_payload(payload)
return ret
def wrap_payload(self, load):
payload = {"enc": "aes"}
if not self.opts.get("cluster_id", None):
load["serial"] = salt.master.SMaster.get_serial()
crypticle = salt.crypt.Crypticle(self.opts, self.aes_key)
payload["load"] = crypticle.dumps(load)
if self.opts["sign_pub_messages"]:
log.debug("Signing data packet")
payload["sig"] = salt.crypt.PrivateKey(
self.master_key.rsa_path,
).sign(payload["load"])
int_payload = {"payload": salt.payload.dumps(payload)}
# If topics are upported, target matching has to happen master side
match_targets = ["pcre", "glob", "list"]
if self.transport.topic_support and load["tgt_type"] in match_targets:
# add some targeting stuff for lists only (for now)
if load["tgt_type"] == "list":
int_payload["topic_lst"] = load["tgt"]
if isinstance(load["tgt"], str):
# Fetch a list of minions that match
_res = self.ckminions.check_minions(
load["tgt"], tgt_type=load["tgt_type"]
)
match_ids = _res["minions"]
log.debug("Publish Side Match: %s", match_ids)
# Send list of miions thru so zmq can target them
int_payload["topic_lst"] = match_ids
else:
int_payload["topic_lst"] = load["tgt"]
return int_payload
async def publish(self, load):
"""
Publish "load" to minions
"""
log.debug(
"Sending payload to publish daemon. jid=%s load=%s",
load.get("jid", None),
repr(load)[:40],
)
payload = salt.payload.dumps(load)
await self.transport.publish(payload)
class MasterPubServerChannel:
""" """
@classmethod
def factory(cls, opts, **kwargs):
transport = salt.transport.ipc_publish_server("master", opts)
return cls(opts, transport)
def __init__(self, opts, transport, presence_events=False):
self.opts = opts
self.transport = transport
self.io_loop = tornado.ioloop.IOLoop.current()
self.master_key = salt.crypt.MasterKeys(self.opts)
self.peer_keys = {}
def send_aes_key_event(self):
data = {"peer_id": self.opts["id"], "peers": {}}
for peer in self.opts.get("cluster_peers", []):
peer_pub = (
pathlib.Path(self.opts["cluster_pki_dir"]) / "peers" / f"{peer}.pub"
)
if peer_pub.exists():
pub = salt.crypt.PublicKey(peer_pub)
aes = salt.master.SMaster.secrets["aes"]["secret"].value
digest = salt.utils.stringutils.to_bytes(
hashlib.sha256(aes).hexdigest()
)
data["peers"][peer] = {
"aes": pub.encrypt(aes),
"sig": salt.crypt.private_encrypt(
self.master_key.master_key, digest
),
}
else:
log.warning("Peer key missing %r", peer_pub)
data["peers"][peer] = {}
with salt.utils.event.get_master_event(
self.opts, self.opts["sock_dir"], listen=False
) as event:
success = event.fire_event(
data,
salt.utils.event.tagify(self.opts["id"], "peer", "cluster"),
timeout=30000, # 30 second timeout
)
if not success:
log.error("Unable to send aes key event")
def __getstate__(self):
return {
"opts": self.opts,
"transport": self.transport,
}
def __setstate__(self, state):
self.opts = state["opts"]
self.transport = state["transport"]
def close(self):
self.transport.close()
def pre_fork(self, process_manager, kwargs=None):
"""
Do anything necessary pre-fork. Since this is on the master side this will
primarily be used to create IPC channels and create our daemon process to
do the actual publishing
:param func process_manager: A ProcessManager, from salt.utils.process.ProcessManager
"""
if hasattr(self.transport, "publish_daemon"):
process_manager.add_process(
self._publish_daemon, kwargs=kwargs, name="EventPublisher"
)
def _publish_daemon(self, **kwargs):
if (
self.opts["event_publisher_niceness"]
and not salt.utils.platform.is_windows()
):
log.info(
"setting EventPublisher niceness to %i",
self.opts["event_publisher_niceness"],
)
os.nice(self.opts["event_publisher_niceness"])
self.io_loop = tornado.ioloop.IOLoop.current()
tcp_master_pool_port = 4520
self.pushers = []
self.auth_errors = {}
for peer in self.opts.get("cluster_peers", []):
pusher = salt.transport.tcp.TCPPublishServer(
self.opts,
pull_host=peer,
pull_port=tcp_master_pool_port,
)
self.auth_errors[peer] = collections.deque()
self.pushers.append(pusher)
if self.opts.get("cluster_id", None):
self.pool_puller = salt.transport.tcp.TCPPuller(
host=self.opts["interface"],
port=tcp_master_pool_port,
io_loop=self.io_loop,
payload_handler=self.handle_pool_publish,
)
self.pool_puller.start()
self.io_loop.add_callback(
self.transport.publisher,
self.publish_payload,
io_loop=self.io_loop,
)
# run forever
try:
self.io_loop.start()
except (KeyboardInterrupt, SystemExit):
pass
finally:
self.close()
async def handle_pool_publish(self, payload, _):
"""
Handle incomming events from cluster peer.
"""
try:
tag, data = salt.utils.event.SaltEvent.unpack(payload)
if tag.startswith("cluster/peer"):
peer = data["peer_id"]
aes = data["peers"][self.opts["id"]]["aes"]
sig = data["peers"][self.opts["id"]]["sig"]
key_str = self.master_key.master_private_decrypt(aes)
digest = salt.utils.stringutils.to_bytes(
hashlib.sha256(key_str).hexdigest()
)
pub_path = (
pathlib.Path(self.opts["cluster_pki_dir"]) / "peers" / f"{peer}.pub"
)
key = salt.crypt.PublicKey(pub_path)
m_digest = key.decrypt(sig)
if m_digest != digest:
log.error("Invalid aes signature from peer: %s", peer)
return
log.info("Received new key from peer %s", peer)
if peer in self.peer_keys:
if self.peer_keys[peer] != key_str:
self.peer_keys[peer] = key_str
self.send_aes_key_event()
while self.auth_errors[peer]:
key, data = self.auth_errors[peer].popleft()
peer_id, parsed_tag = self.parse_cluster_tag(tag)
try:
event_data = self.extract_cluster_event(peer_id, data)
except salt.exceptions.AuthenticationError:
log.error(
"Event from peer failed authentication: %s", peer_id
)
else:
await self.transport.publish_payload(
salt.utils.event.SaltEvent.pack(
parsed_tag, event_data
)
)
else:
self.peer_keys[peer] = key_str
self.send_aes_key_event()
while self.auth_errors[peer]:
key, data = self.auth_errors[peer].popleft()
peer_id, parsed_tag = self.parse_cluster_tag(tag)
try:
event_data = self.extract_cluster_event(peer_id, data)
except salt.exceptions.AuthenticationError:
log.error(
"Event from peer failed authentication: %s", peer_id
)
else:
await self.transport.publish_payload(
salt.utils.event.SaltEvent.pack(parsed_tag, event_data)
)
elif tag.startswith("cluster/event"):
peer_id, parsed_tag = self.parse_cluster_tag(tag)
try:
event_data = self.extract_cluster_event(peer_id, data)
except salt.exceptions.AuthenticationError:
self.auth_errors[peer_id].append((tag, data))
else:
await self.transport.publish_payload(
salt.utils.event.SaltEvent.pack(parsed_tag, event_data)
)
else:
log.error("This cluster tag not valid %s", tag)
except Exception: # pylint: disable=broad-except
log.critical("Unhandled error while polling master events", exc_info=True)
return None
def parse_cluster_tag(self, tag):
peer_id = tag.replace("cluster/event/", "").split("/")[0]
stripped_tag = tag.replace(f"cluster/event/{peer_id}/", "")
return peer_id, stripped_tag
def extract_cluster_event(self, peer_id, data):
if peer_id in self.peer_keys:
crypticle = salt.crypt.Crypticle(self.opts, self.peer_keys[peer_id])
event_data = crypticle.loads(data)["event_payload"]
# __peer_id can be used to know if this event came from a
# different master.
event_data["__peer_id"] = peer_id
return event_data
raise salt.exceptions.AuthenticationError("Peer aes key not available")
async def publish_payload(self, load, *args):
tag, data = salt.utils.event.SaltEvent.unpack(load)
tasks = []
if not tag.startswith("cluster/peer"):
tasks = [
asyncio.create_task(
self.transport.publish_payload(load), name=self.opts["id"]
)
]
for pusher in self.pushers:
log.debug("Publish event to peer %s:%s", pusher.pull_host, pusher.pull_port)
if tag.startswith("cluster/peer"):
tasks.append(
asyncio.create_task(pusher.publish(load), name=pusher.pull_host)
)
continue
crypticle = salt.crypt.Crypticle(
self.opts, salt.master.SMaster.secrets["aes"]["secret"].value
)
load = {"event_payload": data}
event_data = salt.utils.event.SaltEvent.pack(
salt.utils.event.tagify(tag, self.opts["id"], "cluster/event"),
crypticle.dumps(load),
)
tasks.append(asyncio.create_task(pusher.publish(event_data)))
await asyncio.gather(*tasks, return_exceptions=True)
for task in tasks:
try:
task.result()
# XXX This error is transport specific and should be something else
except tornado.iostream.StreamClosedError:
if task.get_name() == self.opts["id"]:
log.error("Unable to forward event to local ipc bus")
else:
log.warning(
"Unable to forward event to cluster peer %s", task.get_name()
)
except Exception as exc: # pylint: disable=broad-except
log.error(
"Unhandled error sending task %s", task.get_name(), exc_info=True
)
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