Merge branch 'master' of github.com:laurivosandi/certidude

README.rst

@@ -17,9 +17,10 @@ eventually support PKCS#11 and in far future WebCrypto.
 
 .. figure:: doc/usecase-diagram.png
 
-Certidude is mainly designed for VPN gateway operators to make
+Certidude is mainly designed for StrongSwan and OpenVPN gateway operators to make
-desktop/laptop VPN setup as easy as possible.
+VPN client setup on laptops, desktops and mobile devices as painless as possible.
-User certificate management eg. for HTTPS is also made reasonably simple.
+Certidude can also be used to manage HTTPS client certificates for
+eg. maintaining an extra layer of protection for intranet websites.
 For a full-blown CA you might want to take a look at
 `EJBCA <http://www.ejbca.org/features.html>`_ or
 `OpenCA <https://pki.openca.org/>`_.
@@ -105,18 +106,29 @@ TODO
 Install
 -------
 
-To install Certidude server:
+To install Certidude server you need certain system libraries in addition to
+regular Python dependencies.
+
+System dependencies for Ubuntu 16.04:
 
 .. code:: bash
 
-    apt-get install -y python python-pip python-dev cython \
+    apt install -y python python-pip python-dev cython \
         python-cffi python-configparser \
         python-pysqlite2 python-mysql.connector python-ldap \
         build-essential libffi-dev libssl-dev libkrb5-dev \
         ldap-utils krb5-user \
         libsasl2-modules-gssapi-mit \
         libsasl2-dev libldap2-dev
-    pip install simplepam pykerberos certidude
+
+System dependencies for Fedora 24+:
+
+.. code:: bash
+
+    yum install redhat-rpm-config python-devel openssl-devel openldap-devel
+
+At the moment package at PyPI is rather outdated.
+Please proceed down to Development section to install Certidude from source.
 
 
 Setting up authority
@@ -139,15 +151,6 @@ If necessary tweak machine's fully qualified hostname in ``/etc/hosts``:
     127.0.0.1 localhost
     127.0.1.1 ca.example.com ca
 
-Then proceed to install `nchan <https://nchan.slact.net/>`_:
-
-.. code:: bash
-
-    wget https://nchan.slact.net/download/nginx-common.deb \
-      https://nchan.slact.net/download/nginx-extras.deb
-    dpkg -i nginx-common.deb nginx-extras.deb
-    apt-get -f install
-
 Certidude can set up certificate authority relatively easily.
 Following will set up certificate authority in ``/var/lib/certidude/hostname.domain.tld``,
 configure systemd service for your platform,
@@ -166,27 +169,27 @@ and start the services:
     systemctl restart certidude
 
 
-Certificate management
+Setting up PAM authentication
-----------------------
+-----------------------------
 
-Use following command to request a certificate on a machine:
+Following assumes the OS user accounts are used to authenticate users.
+This means users can be easily managed with OS tools such as ``adduser``, ``usermod``, ``userdel`` etc.
 
-.. code::
+Make sure you insert `AllowUsers administrator-account-username`
+to SSH server configuration if you have SSH server installed on the machine
+to prevent regular users from accessing the command line of certidude.
+Note that in future we're planning to add command-line interaction
+in which case SSH access makes sense.
 
-    certidude setup client ca.example.com
+If you're planning to use PAM for authentication you need to install corresponding
+Python modules:
 
-Use following to list signing requests, certificates and revoked certificates on server:
+.. code:: bash
 
-.. code::
+    pip install simplepam
-
-    certidude list
-
-Use web interface or following to sign a certificate on server:
-
-.. code::
-
-    certidude sign client-hostname-or-common-name
 
+The default configuration generated by ``certidude setup`` should make use of the
+PAM.
 
 Setting up Active Directory authentication
 ------------------------------------------
@@ -199,6 +202,7 @@ Install dependencies:
 .. code:: bash
 
     apt-get install samba-common-bin krb5-user ldap-utils
+    pip install pykerberos
 
 Reset Samba client configuration in ``/etc/samba/smb.conf``, adjust
 workgroup and realm accordingly:
@@ -274,33 +278,58 @@ Common pitfalls:
   the CA machine to domain, eg when you're running CA behind SSL terminating web server:
   Bad credentials: Unspecified GSS failure.  Minor code may provide more information (851968)
 
-Automating certificate setup
-----------------------------
 
-Ubuntu 14.04 based desktops come with NetworkManager installed.
+Setting up services
-Create ``/etc/NetworkManager/dispatcher.d/certidude`` with following content:
+-------------------
+
+Set up services as usual (OpenVPN, Strongswan, etc), when setting up certificates
+generate signing request with TLS server flag set.
+Paste signing request into the Certidude web interface and hit the submit button.
+
+Since signing requests with custom flags are not allowed to be signed
+from the interface due to security concerns, sign the certificate at Certidude command line:
 
 .. code:: bash
 
-    #!/bin/sh -e
+    certidude sign gateway.example.com
-    # Set up certificates for IPSec connection
 
-    case "$2" in
+Download signed certificate from the web interface or ``wget`` it into the service machine.
-        up)
+Fetch also CA certificate and finish configuring the service.
-            LANG=C.UTF-8 /usr/local/bin/certidude request spawn -k
-        ;;
-    esac
 
-Finally make it executable:
+
+Setting up clients
+------------------
+
+This example works for Ubuntu 16.04 desktop with corresponding plugins installed
+for NetworkManager.
+
+Configure Certidude client in ``/etc/certidude/client.conf``:
+
+.. code:: ini
+
+    [ca.example.com]
+    insecure = true
+    trigger = interface up
+
+Configure services in ``/etc/certidude/services.conf``:
 
 .. code:: bash
 
-    chmod +x /etc/NetworkManager/dispatcher.d/certidude
+    [gateway.example.com]
+    authority = ca.example.com
+    service = network-manager/openvpn
+    remote = gateway.example.com
 
-Whenever a wired or wireless connection is brought up,
+To request certificate:
-the dispatcher invokes ``certidude`` in order to generate RSA keys,
+
-submit CSR, fetch signed certificate,
+.. code:: bash
-create NetworkManager configuration for the VPN connection.
+
+    certidude request
+
+The keys, signing requests, certificates and CRL-s are placed under
+/var/lib/certidude/ca.example.com/
+
+The VPN connection should immideately become available under network connections.
 
 
 Development
@@ -323,7 +352,7 @@ To generate templates:
 
 .. code:: bash
 
-    apt-get install npm nodejs
+    apt install npm nodejs
     sudo ln -s nodejs /usr/bin/node # Fix 'env node' on Ubuntu 14.04
     npm install -g nunjucks@2.5.2
     nunjucks-precompile --include "\\.html$" --include "\\.svg$" certidude/static/ > certidude/static/js/templates.js
@@ -340,3 +369,30 @@ To install the package from the source:
 .. code:: bash
 
     python setup.py  install --single-version-externally-managed --root /
+
+To uninstall:
+
+    pip uninstall certidude
+
+
+Certificate attributes
+----------------------
+
+Certificates have a lot of fields that can be filled in.
+In any case country, state, locality, organization, organizational unit are not filled in
+as this information will already exist in AD and duplicating it in the certificate management
+doesn't make sense. Additionally the information will get out of sync if
+attributes are changed in AD but certificates won't be updated.
+
+If machine is enrolled, eg by running certidude request:
+
+* If Kerberos credentials are presented machine is automatically enrolled
+* Common name is set to short hostname/machine name in AD
+* E-mail is not filled in (maybe we can fill in something from AD?)
+* Given name and surname are not filled in
+
+If user enrolls, eg by clicking generate bundle button in the web interface:
+
+* Common name is either set to username or username@device-identifier depending on the 'user certificate enrollment' setting
+* Given name and surname are filled in based on LDAP attributes of the user
+* E-mail not filled in (should it be filled in? Can we even send mail to user if it's in external domain?)

certidude/auth.py

@@ -1,7 +1,6 @@
 
 import click
 import falcon
-import kerberos # If this fails pip install kerberos
 import logging
 import os
 import re
@@ -13,6 +12,7 @@ from certidude import config, const
 logger = logging.getLogger("api")
 
 if "kerberos" in config.AUTHENTICATION_BACKENDS:
+    import kerberos # If this fails pip install kerberos
     ktname = os.getenv("KRB5_KTNAME")
 
     if not ktname:
@@ -186,7 +186,7 @@ def authenticate(optional=False):
             if not simplepam.authenticate(user, passwd, "sshd"):
                 logger.critical(u"Basic authentication failed for user %s from  %s",
                     repr(user), req.context.get("remote_addr"))
-                raise falcon.HTTPForbidden("Forbidden", "Invalid password")
+                raise falcon.HTTPUnauthorized("Forbidden", "Invalid password", ("Basic",))
 
             req.context["user"] = User.objects.get(user)
             return func(resource, req, resp, *args, **kwargs)

certidude/cli.py

@@ -239,7 +239,7 @@ def certidude_request(fork):
                 nm_config.set("vpn", "connection-type", "tls")
                 nm_config.set("vpn", "comp-lzo", "yes")
                 nm_config.set("vpn", "cert-pass-flags", "0")
-                nm_config.set("vpn", "tap-dev", "yes")
+                nm_config.set("vpn", "tap-dev", "no")
                 nm_config.set("vpn", "remote-cert-tls", "server") # Assert TLS Server flag of X.509 certificate
                 nm_config.set("vpn", "remote", service_config.get(endpoint, "remote"))
                 nm_config.set("vpn", "key", endpoint_key_path)
@@ -1174,6 +1174,7 @@ def certidude_serve(port, listen):
     from certidude import config
 
     # Fetch UID, GID of certidude user
+    if os.getuid() == 0:
         import pwd
         _, _, uid, gid, gecos, root, shell = pwd.getpwnam("certidude")
         restricted_groups = []