README.md

@@ -92,18 +92,18 @@ Enabling bombshell-client access to dom0
 create a file `/etc/qubes-rpc/qubes.VMshell` with mode `0755` and make
 sure its contents say `/bin/bash`.
 
-You will then create a file `/etc/qubes/policy.d/80-ansible-qubes.policy`
-with mode 0664, owned by `root` and group `qubes`.  Add a policy
+You will then create a file `/etc/qubes-rpc/policy/qubes.VMShell` with
+mode 0664, owned by your login user, and group `qubes`.  Add a policy
 line towards the top of the file:
 
 ```
-qubes.VMShell           *           controller          *     allow
+yourvm dom0 ask
 ```
 
-Where `controller` represents the name of the VM you will be executing
-`bombshell-client` against `dom0` from.
+Where `yourvm` represents the name of the VM you will be executing
+`bombshell-client` against dom0 from.
 
-That's it -- `bombshell-client` should work against `dom0` now.  Of course,
+That's it -- `bombshell-client` should work against dom0 now.  Of course,
 you can adjust the policy to have it not ask — do the security math
 on what that implies.
 

action_plugins/commonlib.py

@@ -96,8 +96,6 @@ def inject_qubes(inject):
             pass
         elif vmtype == "ProxyVM":
             add(flags, "proxy")
-        elif vmtype == "DispVM":
-            pass
         elif vmtype == "TemplateVM":
             try:
                 qubes["source"] = qubes["template"]

action_plugins/qubesformation.py

@@ -8,24 +8,15 @@ from ansible.plugins.action.template import ActionModule as template
 sys.path.insert(0, os.path.dirname(__file__))
 import commonlib
 
+
 contents = """{{ vms | to_nice_yaml }}"""
 topcontents = "{{ saltenv }}:\n  '*':\n  - {{ recipename }}\n"
 
+
 def generate_datastructure(vms, task_vars):
     dc = collections.OrderedDict
     d = dc()
     for n, data in vms.items():
-        # This block will skip any VMs that are not in the groups defined in the 'formation_vm_groups' variable
-        # This allows you to deploy in multiple stages which is useful in cases
-        # where you want to create a template after another template is already provisioned.
-        if 'formation_vm_groups' in task_vars:
-            continueLoop = True
-            for group in task_vars['formation_vm_groups']:
-                if n in task_vars['hostvars'][n]['groups'][group]:
-                    continueLoop = False
-            if continueLoop:
-                continue
-        
         qubes = data['qubes']
         d[task_vars['hostvars'][n]['inventory_hostname_short']] = dc(qvm=['vm'])
         vm = d[task_vars['hostvars'][n]['inventory_hostname_short']]
@@ -99,6 +90,7 @@ def generate_datastructure(vms, task_vars):
 
     return d
 
+
 class ActionModule(template):
 
     TRANSFERS_FILES = True
@@ -107,7 +99,7 @@ class ActionModule(template):
         qubesdata = commonlib.inject_qubes(task_vars)
         task_vars["vms"] = generate_datastructure(qubesdata, task_vars)
         with tempfile.NamedTemporaryFile() as x:
-            x.write(contents.encode())
+            x.write(contents)
             x.flush()
             self._task.args['src'] = x.name
             retval = template.run(self, tmp, task_vars)
@@ -115,7 +107,7 @@ class ActionModule(template):
                 return retval
     
             with tempfile.NamedTemporaryFile() as y:
-                y.write(topcontents.encode())
+                y.write(topcontents)
                 y.flush()
 
                 # Create new tmp path -- the other was blown away.

ansible-qubes.spec

@@ -3,7 +3,7 @@
 %define mybuildnumber %{?build_number}%{?!build_number:1}
 
 Name:           ansible-qubes
-Version:        0.0.21
+Version:        0.0.15
 Release:        %{mybuildnumber}%{?dist}
 Summary:        Inter-VM program execution for Qubes OS AppVMs and StandaloneVMs
 BuildArch:      noarch

bin/bombshell-client

@@ -2,6 +2,7 @@
 
 import base64
 import pickle
+import contextlib
 import errno
 import fcntl
 import os
@@ -42,6 +43,18 @@ def set_proc_name(newname):
     libc.prctl(15, byref(buff), 0, 0, 0)
 
 
+@contextlib.contextmanager
+def mutexfile(filepath):
+    oldumask = os.umask(0o077)
+    try:
+        f = open(filepath, "a")
+    finally:
+        os.umask(oldumask)
+    fcntl.lockf(f.fileno(), fcntl.LOCK_EX)
+    yield
+    f.close()
+
+
 def unset_cloexec(fd):
     old = fcntl.fcntl(fd, fcntl.F_GETFD)
     fcntl.fcntl(fd, fcntl.F_SETFD, old & ~fcntl.FD_CLOEXEC)
@@ -321,18 +334,12 @@ def quotedargs():
     return " ".join(quote(x) for x in sys.argv[1:])
 
 
-def quotedargs_ellipsized(cmdlist):
-    text = " ".join(quote(x) for x in cmdlist)
-    if len(text) > 80:
-        text = text[:77] + "..."
-    return text
-
 def main_master():
     set_proc_name("bombshell-client (master) %s" % quotedargs())
     global logging
     logging = LoggingEmu("master")
 
-    logging.info("Started with arguments: %s", quotedargs_ellipsized(sys.argv[1:]))
+    logging.info("Started with arguments: %s", sys.argv[1:])
 
     global debug_enabled
     args = sys.argv[1:]
@@ -345,7 +352,7 @@ def main_master():
     assert remote_command
 
     def anypython(exe):
-        return "` test -x %s && echo %s || echo python3`" % (
+        return "` test -x %s && echo %s || echo python`" % (
             quote(exe),
             quote(exe),
         )
@@ -363,27 +370,28 @@ def main_master():
 
     saved_stderr = openfdforappend(os.dup(sys.stderr.fileno()))
 
-    try:
-        p = subprocess.Popen(
-            ["qrexec-client-vm", remote_vm, "qubes.VMShell"],
-            stdin=subprocess.PIPE,
-            stdout=subprocess.PIPE,
-            close_fds=True,
-            preexec_fn=os.setpgrp,
-            bufsize=0,
-        )
-    except OSError as e:
-        logging.error("cannot launch qrexec-client-vm: %s", e)
-        return 127
+    with mutexfile(os.path.expanduser("~/.bombshell-lock")):
+        try:
+            p = subprocess.Popen(
+                ["qrexec-client-vm", remote_vm, "qubes.VMShell"],
+                stdin=subprocess.PIPE,
+                stdout=subprocess.PIPE,
+                close_fds=True,
+                preexec_fn=os.setpgrp,
+                bufsize=0,
+            )
+        except OSError as e:
+            logging.error("cannot launch qrexec-client-vm: %s", e)
+            return 127
 
-    logging.debug("Writing the helper text into the other side")
-    p.stdin.write(remote_helper_text)
-    p.stdin.flush()
+        logging.debug("Writing the helper text into the other side")
+        p.stdin.write(remote_helper_text)
+        p.stdin.flush()
 
-    confirmation, errmsg = recv_confirmation(p.stdout)
-    if confirmation != 0:
-        logging.error("remote: %s", errmsg)
-        return confirmation
+        confirmation, errmsg = recv_confirmation(p.stdout)
+        if confirmation != 0:
+            logging.error("remote: %s", errmsg)
+            return confirmation
 
     handled_signals = (
         signal.SIGINT,
@@ -425,7 +433,7 @@ def main_remote():
     global logging
     logging = LoggingEmu("remote")
 
-    logging.info("Started with arguments: %s", quotedargs_ellipsized(sys.argv[1:]))
+    logging.info("Started with arguments: %s", sys.argv[1:])
 
     global debug_enabled
     if "-d" in sys.argv[1:]:
@@ -474,11 +482,10 @@ def main_remote():
     muxer.name = "remote multiplexer"
     muxer.start()
 
-    nicecmd_ellipsized = quotedargs_ellipsized(cmd)
-    logging.info("Started %s", nicecmd_ellipsized)
+    logging.info("Started %s", nicecmd)
 
     retval = p.wait()
-    logging.info("Return code %s for %s", retval, nicecmd_ellipsized)
+    logging.info("Return code %s for %s", retval, nicecmd)
     muxer.join()
     logging.info("Ending bombshell")
     return retval

build.parameters

@@ -1 +1 @@
-["RELEASE": "q4.2 38 39"]
+["RELEASE": "q4.1 36"]

connection_plugins/qubes.py

@@ -63,20 +63,14 @@ class x(object):
 display = x()
 
 
-BUFSIZE = 64*1024  # any bigger and it causes issues because we don't read multiple chunks until completion
+BUFSIZE = 128*1024  # any bigger and it causes issues because we don't read multiple chunks until completion
 CONNECTION_TRANSPORT = "qubes"
 CONNECTION_OPTIONS = {
     'management_proxy': '--management-proxy',
 }
 
 
-def debug(text):
-    return
-    print(text, file=sys.stderr)
-
-
 def encode_exception(exc, stream):
-    debug("encoding exception")
     stream.write('{}\n'.format(len(exc.__class__.__name__)).encode('ascii'))
     stream.write('{}'.format(exc.__class__.__name__).encode('ascii'))
     for attr in "errno", "filename", "message", "strerror":
@@ -85,7 +79,6 @@ def encode_exception(exc, stream):
 
 
 def decode_exception(stream):
-    debug("decoding exception")
     name_len = stream.readline(16)
     name_len = int(name_len)
     name = stream.read(name_len)
@@ -114,7 +107,6 @@ def decode_exception(stream):
 
 
 def popen(cmd, in_data, outf=sys.stdout):
-    debug("popening on remote %s" % type(in_data))
     try:
         p = subprocess.Popen(
             cmd, shell=False, stdin=subprocess.PIPE,
@@ -132,11 +124,9 @@ def popen(cmd, in_data, outf=sys.stdout):
     outf.write('{}\n'.format(len(err)).encode('ascii'))
     outf.write(err)
     outf.flush()
-    debug("finished popening")
 
 
 def put(out_path):
-    debug("dest writing %s" % out_path)
     try:
         f = open(out_path, "wb")
         sys.stdout.write(b'Y\n')
@@ -146,25 +136,18 @@ def put(out_path):
         return
     while True:
         chunksize = int(sys.stdin.readline(16))
-        if not chunksize:
-            debug("looks like we have no more to read")
+        if chunksize == 0:
             break
-        while chunksize:
-            debug(type(chunksize))
-            chunk = sys.stdin.read(chunksize)
-            assert chunk
-            debug("dest writing %s" % len(chunk))
-            try:
-                f.write(chunk)
-            except (IOError, OSError) as e:
-                sys.stdout.write(b'N\n')
-                encode_exception(e, sys.stdout)
-                f.close()
-                return
-            chunksize = chunksize - len(chunk)
-            debug("remaining %s" % chunksize)
-        sys.stdout.write(b'Y\n')
-        sys.stdout.flush()
+        chunk = sys.stdin.read(chunksize)
+        assert len(chunk) == chunksize, ("Mismatch in chunk length", len(chunk), chunksize)
+        try:
+            f.write(chunk)
+            sys.stdout.write(b'Y\n')
+        except (IOError, OSError) as e:
+            sys.stdout.write(b'N\n')
+            encode_exception(e, sys.stdout)
+            f.close()
+            return
     try:
         f.flush()
     except (IOError, OSError) as e:
@@ -172,12 +155,10 @@ def put(out_path):
         encode_exception(e, sys.stdout)
         return
     finally:
-        debug("finished writing dest")
         f.close()
 
 
 def fetch(in_path, bufsize):
-    debug("Fetching from remote %s" % in_path)
     try:
         f = open(in_path, "rb")
     except (IOError, OSError) as e:
@@ -225,7 +206,7 @@ sys.stdout = sys.stdout.buffer if hasattr(sys.stdout, 'buffer') else sys.stdout
 '''
 payload = b'\n\n'.join(
     inspect.getsource(x).encode("utf-8")
-    for x in (debug, encode_exception, popen, put, fetch)
+    for x in (encode_exception, popen, put, fetch)
 ) + \
 b'''
 
@@ -313,7 +294,7 @@ class Connection(ConnectionBase):
         if not self._connected:
             remote_cmd = [to_bytes(x, errors='surrogate_or_strict') for x in [
                 # 'strace', '-s', '2048', '-o', '/tmp/log',
-                 'python3', '-u', '-i', '-c', preamble
+                 'python', '-u', '-i', '-c', preamble
             ]]
             addr = self._play_context.remote_addr
             proxy = to_bytes(self.get_option("management_proxy")) if self.get_option("management_proxy") else ""
@@ -375,18 +356,16 @@ class Connection(ConnectionBase):
             cmd = shlex.split(cmd)
         display.vvvv("EXEC %s" % cmd, host=self._play_context.remote_addr)
         try:
-            payload = ('popen(%r, %r)\n\n' % (cmd, in_data)).encode("utf-8")
+            payload = ('popen(%r, %r)\n' % (cmd, in_data)).encode("utf-8")
             self._transport.stdin.write(payload)
             self._transport.stdin.flush()
             yesno = self._transport.stdout.readline(2)
-            debug("Reading yesno")
         except Exception:
             self._abort_transport()
             raise
         if yesno == "Y\n" or yesno == b"Y\n":
             try:
                 retcode = self._transport.stdout.readline(16)
-                debug("Reading retcode")
                 try:
                     retcode = int(retcode)
                 except Exception:
@@ -423,7 +402,6 @@ class Connection(ConnectionBase):
         else:
             self._abort_transport()
             raise errors.AnsibleError("pass/fail from remote end is unexpected: %r" % yesno)
-        debug("finished popening on master")
 
     def put_file(self, in_path, out_path):
         '''Transfer a file from local to VM.'''
@@ -445,7 +423,6 @@ class Connection(ConnectionBase):
         with open(in_path, 'rb') as in_file:
             while True:
                 chunk = in_file.read(BUFSIZE)
-                debug("source writing %s bytes" % len(chunk))
                 try:
                     self._transport.stdin.write(("%s\n" % len(chunk)).encode("utf-8"))
                     self._transport.stdin.flush()
@@ -465,15 +442,9 @@ class Connection(ConnectionBase):
                 else:
                     self._abort_transport()
                     raise errors.AnsibleError("pass/fail from remote end is unexpected: %r" % yesno)
-                debug("on this side it's all good")
-
-        self._transport.stdin.write(("%s\n" % 0).encode("utf-8"))
-        self._transport.stdin.flush()
-        debug("finished writing source")
 
     def fetch_file(self, in_path, out_path):
         '''Fetch a file from VM to local.'''
-        debug("fetching to local")
         super(Connection, self).fetch_file(in_path, out_path)
         display.vvvv("FETCH %s to %s" % (in_path, out_path), host=self._play_context.remote_addr)
         in_path = _prefix_login_path(in_path)

doc/Enhance your Ansible with Ansible Qubes.md

@@ -24,13 +24,13 @@ Integrate this software into your Ansible setup (within your `managevm`) VM) by:
 
 ## Set up the policy file for `qubes.VMShell`
 
-Edit (as `root`) the file `/etc/qubes/policy.d/80-ansible-qubes.policy`
+Edit (as `root`) the file `/etc/qubes-rpc/policy/qubes.VMShell`
 located on the file system of your `dom0`.
 
 At the top of the file, add the following two lines:
 
 ```
-qubes.VMShell    *    managevm     *      allow
+managevm $anyvm allow
 ```
 
 This first line lets `managevm` execute any commands on any VM on your
@@ -41,21 +41,25 @@ security prompt to allow `qubes.VMShell` on the target VM you're managing.
 
 Now save that file, and exit your editor.
 
-If your dom0 has a file `/etc/qubes-rpc/policy/qubes.VMShell`,
-you can delete it now.  It is obsolete.
-
 ### Optional: allow `managevm` to manage `dom0`
 
-The next step is to add the RPC service proper to dom0.  Edit the file
+Before the line you added in the previous step, add this line:
+
+```
+managevm dom0 allow
+```
+
+This line lets `managevm` execute any commands in `dom0`.  Be sure you
+understand the security implications of such a thing.
+
+The next step is to add the RPC service proper.  Edit the file
 `/etc/qubes-rpc/qubes.VMShell` to have a single line that contains:
 
 ```
 exec bash
 ```
 
-Make the file executable.
-
-That is it.  `dom0` should work now.  Note you do this at your own risk.
+That is it.  `dom0` should work now.
 
 
 ## Test `qrun` works

doc/Remote management of Qubes OS servers.md

@@ -13,11 +13,11 @@ to set up a policy that allows us to remotely execute commands on any VM of the
 network server, without having to be physically present to click any dialogs authorizing
 the execution of those commands.
 
-In `dom0` of your Qubes server, edit `/etc/qubes/policy.d/80-ansible-qubes.policy` to add,
+In `dom0` of your Qubes server, edit `/etc/qubes-rpc/policy/qubes.VMShell` to add,
 at the top of the file, a policy that looks like this:
 
 ```
-qubes.VMShell    *    managevm     *      allow
+exp-manager   $anyvm    allow
 ```
 
 This tells Qubes OS that `exp-manager` is now authorized to run any command in any of the VMs.
@@ -25,13 +25,13 @@ This tells Qubes OS that `exp-manager` is now authorized to run any command in a
 **Security note**: this does mean that anyone with access to `exp-manager` can do
 literally anything on any of your VMs in your Qubes OS server.
 
-If that is not what you want, then replace `*` after `managevm` with the name of the VMs you
-would like to manage.  For example: if you would like `exp-manager` to be authorized to run
-commands *only* on `exp-net`, then you can use the following policy:
+If that is not what you want, then replace `$anyvm` with the name of the VMs you would like
+to manage.  For example: if you would like `exp-manager` to be authorized to run commands
+*only* on `exp-net`, then you can use the following policy:
 
 ```
-qubes.VMShell    *      exp-manager   exp-net   allow
-qubes.VMShell    *      exp-manager   @anyvm    deny
+exp-manager   exp-net   allow
+exp-manager   $anyvm    deny
 ```
 
 Try it out now.  SSH from your manager machine into `exp-manager` and run:
@@ -47,7 +47,7 @@ You should see `yes` followed by `exp-net` on the output side.
 If you expect that you will need to run commands in `dom0` from your manager machine
 (say, to create, stop, start and modify VMs in the Qubes OS server),
 then you will have to create a file `/etc/qubes-rpc/qubes.VMShell` as `root` in `dom0`,
-with the contents `/bin/bash` and permission mode `0755`.  Doing this will enable you
+with the contents `/bin/bash` and permission mode `0644`.  Doing this will enable you
 to run commands on `dom0` which you can subsequently test in `exp-manager` by running command:
 
 ```
@@ -57,7 +57,7 @@ qvm-run dom0 'echo yes ; hostname'
 like you did before.
 
 **Security note**: this does mean that anyone with access to `exp-manager` can do
-*literally anything* on your Qubes OS server.  You have been warned.
+literally anything on your Qubes OS server.
 
 ## Integrate your Ansible setup