Merge authority setup and production setup

README.rst

@@ -74,23 +74,14 @@ To install Certidude:
 
 .. code:: bash
 
-    apt-get install -y python python-pip python-dev cython python-configparser \
+    apt-get 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
     pip install certidude
 
-Make sure you're running PyOpenSSL 0.15+ from PyPI,
-not the outdated one provided by APT.
-
-Create a system user for ``certidude``:
-
-.. code:: bash
-
-    adduser --system --no-create-home --group certidude
-    mkdir /etc/certidude
-
 
 Setting up authority
 --------------------
@@ -103,27 +94,46 @@ You can check it with:
 
     hostname -f
 
-The command should return ca.example.com
+The command should return ``ca.example.com``.
 
-Certidude can set up certificate authority relatively easily,
+If necessary tweak machine's fully qualified hostname in ``/etc/hosts``:
-following will set up certificate authority in /var/lib/certidude/hostname.domain.tld:
+
+.. code::
+
+    127.0.0.1 localhost
+    127.0.1.1 ca.example.com ca
+
+Then proceed to install `nchan <https://nchan.slact.net/>`_ and ``uwsgi``:
+
+.. 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 install nginx uwsgi uwsgi-plugin-python
+
+Certidude can set up certificate authority relatively easily.
+Following will set up certificate authority in ``/var/lib/certidude/hostname.domain.tld``,
+configure uWSGI in ``/etc/uwsgi/apps-available/certidude.ini``,
+nginx in ``/etc/nginx/sites-available/certidude.conf``,
+cronjobs in ``/etc/cron.hourly/certidude`` and much more:
 
 .. code:: bash
 
     certidude setup authority
 
-Tweak the configuration in /etc/certidude/server.conf until you meet your requirements and
+Tweak the configuration in ``/etc/certidude/server.conf`` until you meet your requirements and
 spawn the signer process:
 
 .. code:: bash
 
     certidude signer spawn
 
-Finally serve the certificate authority via web:
+Finally restart services:
 
 .. code:: bash
 
-    certidude serve
+    service nginx restart
+    service uwsgi restart
 
 
 Certificate management
@@ -148,137 +158,6 @@ Use web interface or following to sign a certificate on server:
     certidude sign client-hostname-or-common-name
 
 
-Production deployment
----------------------
-
-Install ``nginx`` and ``uwsgi``:
-
-.. code:: bash
-
-    apt-get install nginx uwsgi uwsgi-plugin-python
-
-For easy setup following is reccommended:
-
-.. code:: bash
-
-    certidude setup production
-
-Otherwise manually configure ``uwsgi`` application in ``/etc/uwsgi/apps-available/certidude.ini``:
-
-.. code:: ini
-
-    [uwsgi]
-    master = true
-    processes = 1
-    vaccum = true
-    uid = certidude
-    gid = certidude
-    plugins = python
-    chdir = /tmp
-    module = certidude.wsgi
-    callable = app
-    chmod-socket = 660
-    chown-socket = certidude:www-data
-    buffer-size = 32768
-    env = LANG=C.UTF-8
-    env = LC_ALL=C.UTF-8
-    env = KRB5_KTNAME=/etc/certidude/server.keytab
-    env = KRB5CCNAME=/run/certidude/krb5cc
-
-Also enable the application:
-
-.. code:: bash
-
-    ln -s ../apps-available/certidude.ini /etc/uwsgi/apps-enabled/certidude.ini
-
-We support `nchan <https://nchan.slact.net/>`_,
-configure the site in /etc/nginx/sites-available/certidude:
-
-.. code::
-
-    upstream certidude_api {
-        server unix:///run/uwsgi/app/certidude/socket;
-    }
-
-    server {
-        server_name localhost;
-        listen 80 default_server;
-        listen [::]:80 default_server ipv6only=on;
-        root /usr/local/lib/python2.7/dist-packages/certidude/static;
-
-        location /api/ {
-            include uwsgi_params;
-            uwsgi_pass certidude_api;
-        }
-
-        # Add following three if you wish to enable push server on this machine
-        location /pub {
-            allow 127.0.0.1;
-            nchan_publisher http;
-            nchan_store_messages off;
-            nchan_channel_id $arg_id;
-        }
-
-        location ~ "^/lp/(.*)" {
-            nchan_subscriber longpoll;
-            nchan_channel_id $1;
-        }
-
-        location ~ "^/ev/(.*)" {
-            nchan_subscriber eventsource;
-            nchan_channel_id $1;
-        }
-    }
-
-Enable the site:
-
-.. code:: bash
-
-    ln -s ../sites-available/certidude /etc/nginx/sites-enabled/certidude
-
-Also adjust ``/etc/nginx/nginx.conf``:
-
-.. code::
-
-    user www-data;
-    worker_processes 4;
-    pid /run/nginx.pid;
-
-    events {
-        worker_connections 768;
-    }
-
-    http {
-        sendfile on;
-        tcp_nopush on;
-        tcp_nodelay on;
-        keepalive_timeout 65;
-        types_hash_max_size 2048;
-        include /etc/nginx/mime.types;
-        default_type application/octet-stream;
-        access_log /var/log/nginx/access.log;
-        error_log /var/log/nginx/error.log;
-        gzip on;
-        gzip_disable "msie6";
-        include /etc/nginx/conf.d/*;
-        include /etc/nginx/sites-enabled/*;
-    }
-
-In your Certidude server's /etc/certidude/server.conf make sure Certidude
-is aware of your nginx setup:
-
-.. code::
-
-    push_server = http://push.example.com/
-
-Restart the services:
-
-.. code:: bash
-
-    service uwsgi restart
-    service nginx restart
-
-
 Setting up Active Directory authentication
 ------------------------------------------
 
@@ -291,13 +170,6 @@ Install dependencies:
 
     apt-get install samba-common-bin krb5-user ldap-utils
 
-Make sure Certidude machine's fully qualified hostname is correct in ``/etc/hosts``:
-
-.. code::
-
-    127.0.0.1 localhost
-    127.0.1.1 ca.example.lan ca
-
 Reset Samba client configuration in ``/etc/samba/smb.conf``:
 
 .. code:: ini
@@ -306,7 +178,7 @@ Reset Samba client configuration in ``/etc/samba/smb.conf``:
     security = ads
     netbios name = CA
     workgroup = EXAMPLE
-    realm = EXAMPLE.LAN
+    realm = EXAMPLE.COM
     kerberos method = system keytab
 
 Reset Kerberos configuration in ``/etc/krb5.conf``:
@@ -314,7 +186,7 @@ Reset Kerberos configuration in ``/etc/krb5.conf``:
 .. code:: ini
 
     [libdefaults]
-    default_realm = EXAMPLE.LAN
+    default_realm = EXAMPLE.COM
     dns_lookup_realm = true
     dns_lookup_kdc = true
 
@@ -417,7 +289,7 @@ To run from source tree:
 
 .. code:: bash
 
-    PYTHONPATH=. KRB5_KTNAME=/etc/certidude/server.keytab LANG=C.UTF-8 python misc/certidude
+    PYTHONPATH=. KRB5CCNAME=/run/certidude/krb5cc KRB5_KTNAME=/etc/certidude/server.keytab LANG=C.UTF-8 python misc/certidude
 
 To install the package from the source:
 

certidude/cli.py

@@ -236,10 +236,9 @@ def certidude_request_spawn(fork):
         os.unlink(pid_path)
 
 
-@click.command("spawn", help="Run privilege isolated signer process")
+@click.command("spawn", help="Restart privilege isolated signer process")
-@click.option("-k", "--kill", default=False, is_flag=True, help="Kill previous instance")
 @click.option("-n", "--no-interaction", default=True, is_flag=True, help="Don't load password protected keys")
-def certidude_signer_spawn(kill, no_interaction):
+def certidude_signer_spawn(no_interaction):
     """
     Spawn privilege isolated signer process
     """
@@ -284,15 +283,14 @@ def certidude_signer_spawn(kill, no_interaction):
         pid = 0
 
     if pid > 0:
-        if kill:
+        try:
-            try:
+            click.echo("Killing %d" % pid)
-                click.echo("Killing %d" % pid)
+            os.kill(pid, signal.SIGTERM)
-                os.kill(pid, signal.SIGTERM)
+            sleep(1)
-                sleep(1)
+            os.kill(pid, signal.SIGKILL)
-                os.kill(pid, signal.SIGKILL)
+            sleep(1)
-                sleep(1)
+        except EnvironmentError:
-            except EnvironmentError:
+            pass
-                pass
 
     child_pid = os.fork()
 
@@ -693,71 +691,19 @@ def certidude_setup_openvpn_networkmanager(server, email_address, common_name, o
         services.set(endpoint, "service", "network-manager/openvpn")
         services.write(open("/etc/certidude/services.conf", "w"))
 
-@click.command("production", help="Set up nginx, uwsgi and cron")
+
+@click.command("authority", help="Set up Certificate Authority in a directory")
 @click.option("--username", default="certidude", help="Service user account, created if necessary, 'certidude' by default")
-@click.option("--hostname", default=HOSTNAME, help="nginx hostname, '%s' by default" % HOSTNAME)
+@click.option("--static-path", default=os.path.join(os.path.dirname(__file__), "static"), help="Path to Certidude's static JS/CSS/etc")
-@click.option("--static-path", default=os.path.join(os.path.dirname(__file__), "static"), help="Static files")
+@click.option("--kerberos-keytab", default="/etc/certidude/server.keytab", help="Kerberos keytab for using 'kerberos' authentication backend, /etc/certidude/server.keytab by default")
-@click.option("--kerberos-keytab", default="/etc/certidude/server.keytab", help="Specify Kerberos keytab")
-@click.option("--push-server", default=None, help="Push server URL")
 @click.option("--nginx-config", "-n",
-    default="/etc/nginx/nginx.conf",
+    default="/etc/nginx/sites-available/certidude.conf",
     type=click.File(mode="w", atomic=True, lazy=True),
-    help="nginx configuration, /etc/nginx/nginx.conf by default")
+    help="nginx site config for serving Certidude, /etc/nginx/sites-available/certidude by default")
 @click.option("--uwsgi-config", "-u",
     default="/etc/uwsgi/apps-available/certidude.ini",
     type=click.File(mode="w", atomic=True, lazy=True),
-    help="uwsgi configuration, /etc/uwsgi/ by default")
+    help="uwsgi configuration for serving Certidude API, /etc/uwsgi/apps-available/certidude.ini by default")
-def certidude_setup_production(username, hostname, push_server, nginx_config, uwsgi_config, static_path, kerberos_keytab):
-    try:
-        pwd.getpwnam(username)
-        click.echo("Username '%s' already exists, excellent!" % username)
-    except KeyError:
-        cmd = "adduser", "--system",  "--no-create-home", "--group", username
-        subprocess.check_call(cmd)
-
-    if subprocess.call("net ads testjoin", shell=True):
-        click.echo("Domain membership check failed, 'net ads testjoin' returned non-zero value", err=True)
-        exit(255)
-
-    if not os.path.exists(kerberos_keytab):
-        subprocess.call("KRB5_KTNAME=FILE:" + kerberos_keytab + " net ads keytab add HTTP -P")
-        click.echo("Created service principal in Kerberos keytab '%s'" % kerberos_keytab)
-
-    if os.path.exists("/etc/krb5.keytab") and os.path.exists("/etc/samba/smb.conf"):
-        # Fetch Kerberos ticket for system account
-        cp = ConfigParser()
-        cp.read("/etc/samba/smb.conf")
-        domain = cp.get("global", "realm").lower()
-        base = ",".join(["dc=" + j for j in domain.split(".")])
-        with open("/etc/cron.hourly/certidude", "w") as fh:
-            fh.write("#!/bin/bash\n")
-            fh.write("KRB5CCNAME=/run/certidude/krb5cc-new kinit -k %s$\n" % cp.get("global", "netbios name"))
-            fh.write("chown certidude /run/certidude/krb5cc-new\n")
-            fh.write("mv /run/certidude/krb5cc-new /run/certidude/krb5cc\n")
-        os.chmod("/etc/cron.hourly/certidude", 0o755)
-        click.echo("Created /etc/cron.hourly/certidude for automatic Kerberos TGT renewal")
-    else:
-        click.echo("Warning: cronjob for Kerberos ticket renewal not created, LDAP with GSSAPI will not be available!")
-
-
-    if not static_path.endswith("/"):
-        static_path += "/"
-
-    nginx_config.write(env.get_template("nginx.conf").render(vars()))
-    click.echo("Generated: %s" % nginx_config.name)
-    uwsgi_config.write(env.get_template("uwsgi.ini").render(vars()))
-    click.echo("Generated: %s" % uwsgi_config.name)
-
-    if os.path.exists("/etc/uwsgi/apps-enabled/certidude.ini"):
-        os.unlink("/etc/uwsgi/apps-enabled/certidude.ini")
-    os.symlink(uwsgi_config.name, "/etc/uwsgi/apps-enabled/certidude.ini")
-    click.echo("Symlinked %s -> /etc/uwsgi/apps-enabled/certidude.ini" % uwsgi_config.name)
-
-    if not push_server:
-        click.echo("Remember to install nchan instead of regular nginx!")
-
-
-@click.command("authority", help="Set up Certificate Authority in a directory")
 @click.option("--parent", "-p", help="Parent CA, none by default")
 @click.option("--common-name", "-cn", default=FQDN, help="Common name, fully qualified hostname by default")
 @click.option("--country", "-c", default=None, help="Country, none by default")
@@ -775,7 +721,70 @@ def certidude_setup_production(username, hostname, push_server, nginx_config, uw
 @click.option("--directory", default=os.path.join("/var/lib/certidude", FQDN), help="Directory for authority files, /var/lib/certidude/%s/ by default" % FQDN)
 @click.option("--server-flags", is_flag=True, help="Add TLS Server and IKE Intermediate extended key usage flags")
 @click.option("--outbox", default="smtp://smtp.%s" % constants.DOMAIN, help="SMTP server, smtp://smtp.%s by default" % constants.DOMAIN)
-def certidude_setup_authority(parent, country, state, locality, organization, organizational_unit, common_name, directory, certificate_lifetime, authority_lifetime, revocation_list_lifetime, revoked_url, certificate_url, push_server, email_address, outbox, server_flags):
+def certidude_setup_authority(username, static_path, kerberos_keytab, nginx_config, uwsgi_config, parent, country, state, locality, organization, organizational_unit, common_name, directory, certificate_lifetime, authority_lifetime, revocation_list_lifetime, revoked_url, certificate_url, push_server, email_address, outbox, server_flags):
+
+    # Expand variables
+    ca_key = os.path.join(directory, "ca_key.pem")
+    ca_crt = os.path.join(directory, "ca_crt.pem")
+    if not static_path.endswith("/"):
+        static_path += "/"
+    certidude_conf = os.path.join("/etc/certidude/server.conf")
+
+    try:
+        pwd.getpwnam("certidude")
+    except KeyError:
+        cmd = "adduser", "--system", "--no-create-home", "--group", "certidude"
+        if subprocess.call(cmd):
+            click.echo("Failed to create system user 'certidude'")
+            return 255
+
+    if not os.path.exists("/etc/certidude"):
+        click.echo("Creating /etc/certidude")
+        os.makedirs("/etc/certidude")
+
+    if os.path.exists(kerberos_keytab):
+        click.echo("Service principal keytab found in '%s'" % kerberos_keytab)
+    else:
+        click.echo("To use 'kerberos' authentication backend create service principal with:")
+        click.echo()
+        click.echo("  KRB5_KTNAME=FILE:%s net ads keytab add HTTP -P" % kerberos_keytab)
+        click.echo("  chown %s %s" % (username, kerberos_keytab))
+        click.echo()
+
+    if os.path.exists("/etc/krb5.keytab") and os.path.exists("/etc/samba/smb.conf"):
+
+        # Fetch Kerberos ticket for system account
+        cp = ConfigParser()
+        cp.read("/etc/samba/smb.conf")
+        domain = cp.get("global", "realm").lower()
+        base = ",".join(["dc=" + j for j in domain.split(".")])
+        with open("/etc/cron.hourly/certidude", "w") as fh:
+            fh.write("#!/bin/bash\n")
+            fh.write("KRB5CCNAME=/run/certidude/krb5cc-new kinit -k %s$\n" % cp.get("global", "netbios name"))
+            fh.write("chown certidude /run/certidude/krb5cc-new\n")
+            fh.write("mv /run/certidude/krb5cc-new /run/certidude/krb5cc\n")
+        os.chmod("/etc/cron.hourly/certidude", 0o755)
+        click.echo("Created /etc/cron.hourly/certidude for automatic Kerberos TGT renewal")
+    else:
+        click.echo("Warning: /etc/krb5.keytab or /etc/samba/smb.conf not found, Kerberos unconfigured")
+
+    nginx_config.write(env.get_template("nginx.conf").render(vars()))
+    click.echo("Generated: %s" % nginx_config.name)
+    uwsgi_config.write(env.get_template("uwsgi.ini").render(vars()))
+    click.echo("Generated: %s" % uwsgi_config.name)
+
+    if not os.path.exists("/etc/nginx/sites-enabled/certidude.conf"):
+        os.symlink("../sites-available/certidude.conf", "/etc/nginx/sites-enabled/certidude.conf")
+        click.echo("Symlinked %s -> /etc/nginx/sites-enabled/" % nginx_config.name)
+    if not os.path.exists("/etc/uwsgi/apps-enabled/certidude.ini"):
+        os.symlink("../apps-available/certidude.ini", "/etc/uwsgi/apps-enabled/certidude.ini")
+        click.echo("Symlinked %s -> /etc/uwsgi/apps-enabled/" % uwsgi_config.name)
+    if os.path.exists("/etc/nginx/sites-enabled/default"):
+        os.unlink("/etc/nginx/sites-enabled/default")
+
+
+    if not push_server:
+        click.echo("Remember to install nchan instead of regular nginx!")
 
     from cryptography import x509
     from cryptography.x509.oid import NameOID, ExtendedKeyUsageOID
@@ -783,16 +792,19 @@ def certidude_setup_authority(parent, country, state, locality, organization, or
     from cryptography.hazmat.primitives import hashes, serialization
     from cryptography.hazmat.primitives.asymmetric import rsa
 
-    # Make sure common_name is valid
+    _, _, uid, gid, gecos, root, shell = pwd.getpwnam("certidude")
-    if not re.match(r"^[\.\-_a-zA-Z0-9]+$", common_name):
+    os.setgid(gid)
-        raise click.ClickException("CA name can contain only alphanumeric, '_' and '-' characters")
+
+    if os.path.exists(certidude_conf):
+        click.echo("Configuration file %s already exists, remove to regenerate" % certidude_conf)
+    else:
+        os.umask(0o137)
+        with open(certidude_conf, "w") as fh:
+            fh.write(env.get_template("certidude.conf").render(vars()))
+        click.echo("Generated %s" % certidude_conf)
 
     if os.path.lexists(directory):
-        raise click.ClickException("Output directory {} already exists.".format(directory))
+        raise click.ClickException("CA directory %s already exists, remove to regenerate" % directory)
-
-    certidude_conf = os.path.join("/etc/certidude/server.conf")
-    if os.path.exists(certidude_conf):
-        raise click.ClickException("Configuration file %s already exists" % certidude_conf)
 
     click.echo("CA configuration files are saved to: {}".format(directory))
 
@@ -809,11 +821,6 @@ def certidude_setup_authority(parent, country, state, locality, organization, or
     if not certificate_url:
         certificate_url = "http://%s/api/certificate/" % common_name
 
-    # File paths
-    ca_key = os.path.join(directory, "ca_key.pem")
-    ca_crt = os.path.join(directory, "ca_crt.pem")
-
-
     subject = issuer = x509.Name([
         x509.NameAttribute(o, value) for o, value in (
             (NameOID.COUNTRY_NAME, country),
@@ -867,9 +874,6 @@ def certidude_setup_authority(parent, country, state, locality, organization, or
 
     click.echo("Signing %s..." % cert.subject)
 
-    _, _, uid, gid, gecos, root, shell = pwd.getpwnam("certidude")
-    os.setgid(gid)
-
     # Create authority directory with 750 permissions
     os.umask(0o027)
     if not os.path.exists(directory):
@@ -883,8 +887,6 @@ def certidude_setup_authority(parent, country, state, locality, organization, or
 
     # Set permission bits to 640
     os.umask(0o137)
-    with open(certidude_conf, "w") as fh:
-        fh.write(env.get_template("certidude.conf").render(vars()))
     with open(ca_crt, "wb") as fh:
         fh.write(cert.public_bytes(serialization.Encoding.PEM))
 
@@ -906,7 +908,7 @@ def certidude_setup_authority(parent, country, state, locality, organization, or
     click.echo()
     click.echo("Use following to launch privilege isolated signer processes:")
     click.echo()
-    click.echo("  certidude signer spawn -k")
+    click.echo("  certidude signer spawn")
     click.echo()
     click.echo("Use following command to serve CA read-only:")
     click.echo()
@@ -1157,7 +1159,6 @@ certidude_setup.add_command(certidude_setup_authority)
 certidude_setup.add_command(certidude_setup_openvpn)
 certidude_setup.add_command(certidude_setup_strongswan)
 certidude_setup.add_command(certidude_setup_client)
-certidude_setup.add_command(certidude_setup_production)
 certidude_setup.add_command(certidude_setup_nginx)
 certidude_request.add_command(certidude_request_spawn)
 certidude_signer.add_command(certidude_signer_spawn)

certidude/templates/certidude.conf

@@ -32,7 +32,7 @@ posix admin group = sudo
 ;backend = ldap
 ldap computer filter = (&(objectclass=user)(objectclass=computer)(samaccountname=%s))
 ldap user filter = (&(objectclass=user)(objectclass=person)(samaccountname=%s))
-ldap admin filter = (&(memberOf=cn=Domain Admins,cn=Users,dc=example,dc=com)(samaccountname=%s))
+ldap admin filter = (&(memberOf=cn=Domain Admins,cn=Users,{% if base %}{{ base }}{% else %}dc=example,dc=com{% endif %})(samaccountname=%s))
 
 # Users are allowed to log in from user subnets
 user subnets = 0.0.0.0/0

certidude/templates/nginx.conf

@@ -1,54 +1,38 @@
-user www-data;
-worker_processes 4;
-pid /run/nginx.pid;
 
-events {
+upstream certidude_api {
-    worker_connections  1024;
+    server unix:///run/uwsgi/app/certidude/socket;
 }
 
-http {
+server {
-    include mime.types;
+    server_name {{ common_name }};
-    default_type application/octet-stream;
+    listen 80 default_server;
-    sendfile on;
+    error_page 500 502 503 504 /50x.html;
-    keepalive_timeout 65;
-    gzip on;
 
-    upstream certidude_api {
+    root {{static_path}};
-        server unix:///run/uwsgi/app/certidude/socket;
+
+    location /api/ {
+        include uwsgi_params;
+        uwsgi_pass certidude_api;
     }
 
-    server {
+    {% if not push_server %}
-        server_name {{hostname}}; # TODO: FQDN, SSL
+    location /pub {
-        listen 80 default_server;
+        allow 127.0.0.1;
-        listen [::]:80 default_server ipv6only=on;
+        nchan_publisher http;
-        error_page 500 502 503 504 /50x.html;
+        nchan_store_messages off;
-
+        nchan_channel_id $arg_id;
-        root {{static_path}};
-
-        location /api/ {
-            include uwsgi_params;
-            uwsgi_pass certidude_api;
-        }
-
-        {% if not push_server %}
-        location /pub {
-            allow 127.0.0.1;
-            nchan_publisher http;
-            nchan_store_messages off;
-            nchan_channel_id $arg_id;
-        }
-
-        location ~ "^/lp/(.*)" {
-            nchan_subscriber longpoll;
-            nchan_channel_id $1;
-        }
-
-        location ~ "^/ev/(.*)" {
-            nchan_subscriber eventsource;
-            nchan_channel_id $1;
-        }
-        {% endif %}
-
     }
+
+    location ~ "^/lp/(.*)" {
+        nchan_subscriber longpoll;
+        nchan_channel_id $1;
+    }
+
+    location ~ "^/ev/(.*)" {
+        nchan_subscriber eventsource;
+        nchan_channel_id $1;
+    }
+    {% endif %}
+
 }
 

certidude/templates/uwsgi.ini

@@ -1,5 +1,5 @@
 [uwsgi]
-exec-as-root = /usr/local/bin/certidude signer spawn -k
+exec-as-root = /usr/local/bin/certidude signer spawn
 master = true
 processes = 1
 vacuum = true