Migrate signature profiles to separate config file

certidude/api/__init__.py

@@ -163,7 +163,8 @@ class SessionResource(AuthorityHandler):
                 admin_subnets=config.ADMIN_SUBNETS or None,
                 signature = dict(
                     revocation_list_lifetime=config.REVOCATION_LIST_LIFETIME,
-                    profiles = [dict(name=k, server=v[0]=="server", lifetime=v[1], organizational_unit=v[2], title=v[3]) for k,v in config.PROFILES.items()]
+                    profiles = sorted([p.serialize() for p in config.PROFILES.values()], key=lambda p:p.get("slug")),
+
                 )
             ) if req.context.get("user").is_admin() else None,
             features=dict(

certidude/api/request.py

@@ -10,6 +10,7 @@ from base64 import b64decode
 from certidude import config, push, errors
 from certidude.auth import login_required, login_optional, authorize_admin
 from certidude.decorators import csrf_protection, MyEncoder
+from certidude.profile import SignatureProfile
 from datetime import datetime
 from oscrypto import asymmetric
 from oscrypto.errors import SignatureError
@@ -71,7 +72,8 @@ class RequestListResource(AuthorityHandler):
 
                 # Automatic enroll with Kerberos machine cerdentials
                 resp.set_header("Content-Type", "application/x-pem-file")
-                cert, resp.body = self.authority._sign(csr, body, overwrite=True)
+                cert, resp.body = self.authority._sign(csr, body,
+                    profile=config.PROFILES["rw"], overwrite=True)
                 logger.info("Automatically enrolled Kerberos authenticated machine %s from %s",
                     machine, req.context.get("remote_addr"))
                 return
@@ -89,28 +91,26 @@ class RequestListResource(AuthorityHandler):
             cert_pk = cert["tbs_certificate"]["subject_public_key_info"].native
             csr_pk = csr["certification_request_info"]["subject_pk_info"].native
 
-            try:
+            # Same public key
+            if cert_pk == csr_pk:
                 buf = req.get_header("X-SSL-CERT")
-                header, _, der_bytes = pem.unarmor(buf.replace("\t", "").encode("ascii"))
+                # Used mutually authenticated TLS handshake, assume renewal
-                handshake_cert = x509.Certificate.load(der_bytes)
+                if buf:
-            except:
+                    header, _, der_bytes = pem.unarmor(buf.replace("\t", "").encode("ascii"))
-                raise
+                    handshake_cert = x509.Certificate.load(der_bytes)
-            else:
-                # Same public key
-                if cert_pk == csr_pk:
-                    # Used mutually authenticated TLS handshake, assume renewal
                     if handshake_cert.native == cert.native:
                         for subnet in config.RENEWAL_SUBNETS:
                             if req.context.get("remote_addr") in subnet:
                                 resp.set_header("Content-Type", "application/x-x509-user-cert")
-                                _, resp.body = self.authority._sign(csr, body, overwrite=True)
+                                _, resp.body = self.authority._sign(csr, body, overwrite=True,
+                                    profile=SignatureProfile.from_cert(cert))
                                 logger.info("Renewing certificate for %s as %s is whitelisted", common_name, req.context.get("remote_addr"))
                                 return
 
-                    # No header supplied, redirect to signed API call
+                # No header supplied, redirect to signed API call
-                    resp.status = falcon.HTTP_SEE_OTHER
+                resp.status = falcon.HTTP_SEE_OTHER
-                    resp.location = os.path.join(os.path.dirname(req.relative_uri), "signed", common_name)
+                resp.location = os.path.join(os.path.dirname(req.relative_uri), "signed", common_name)
-                    return
+                return
 
 
         """
@@ -123,7 +123,7 @@ class RequestListResource(AuthorityHandler):
                     if req.context.get("remote_addr") in subnet:
                         try:
                             resp.set_header("Content-Type", "application/x-pem-file")
-                            _, resp.body = self.authority._sign(csr, body)
+                            _, resp.body = self.authority._sign(csr, body, profile=config.PROFILES["rw"])
                             logger.info("Autosigned %s as %s is whitelisted", common_name, req.context.get("remote_addr"))
                             return
                         except EnvironmentError:
@@ -222,7 +222,7 @@ class RequestDetailResource(AuthorityHandler):
         """
         try:
             cert, buf = self.authority.sign(cn,
-                profile=req.get_param("profile", default="default"),
+                profile=config.PROFILES[req.get_param("profile", default="rw")],
                 overwrite=True,
                 signer=req.context.get("user").name)
             # Mailing and long poll publishing implemented in the function above

certidude/authority.py

@@ -71,7 +71,7 @@ def self_enroll():
         from certidude import authority
         from certidude.common import drop_privileges
         drop_privileges()
-        authority.sign(common_name, skip_push=True, overwrite=True, profile="srv")
+        authority.sign(common_name, skip_push=True, overwrite=True, profile=config.PROFILES["srv"])
         sys.exit(0)
     else:
         os.waitpid(pid, 0)
@@ -82,7 +82,7 @@ def self_enroll():
 
 
 def get_request(common_name):
-    if not re.match(const.RE_HOSTNAME, common_name):
+    if not re.match(const.RE_COMMON_NAME, common_name):
         raise ValueError("Invalid common name %s" % repr(common_name))
     path = os.path.join(config.REQUESTS_DIR, common_name + ".pem")
     try:
@@ -95,7 +95,7 @@ def get_request(common_name):
         raise errors.RequestDoesNotExist("Certificate signing request file %s does not exist" % path)
 
 def get_signed(common_name):
-    if not re.match(const.RE_HOSTNAME, common_name):
+    if not re.match(const.RE_COMMON_NAME, common_name):
         raise ValueError("Invalid common name %s" % repr(common_name))
     path = os.path.join(config.SIGNED_DIR, common_name + ".pem")
     with open(path, "rb") as fh:
@@ -158,7 +158,7 @@ def store_request(buf, overwrite=False, address="", user=""):
 
     common_name = csr["certification_request_info"]["subject"].native["common_name"]
 
-    if not re.match(const.RE_HOSTNAME, common_name):
+    if not re.match(const.RE_COMMON_NAME, common_name):
         raise ValueError("Invalid common name")
 
     request_path = os.path.join(config.REQUESTS_DIR, common_name + ".pem")
@@ -296,7 +296,7 @@ def export_crl(pem=True):
 
 def delete_request(common_name):
     # Validate CN
-    if not re.match(const.RE_HOSTNAME, common_name):
+    if not re.match(const.RE_COMMON_NAME, common_name):
         raise ValueError("Invalid common name")
 
     path, buf, csr, submitted = get_request(common_name)
@@ -310,7 +310,7 @@ def delete_request(common_name):
         config.LONG_POLL_PUBLISH % hashlib.sha256(buf).hexdigest(),
         headers={"User-Agent": "Certidude API"})
 
-def sign(common_name, skip_notify=False, skip_push=False, overwrite=False, profile="default", signer=None):
+def sign(common_name, profile, skip_notify=False, skip_push=False, overwrite=False, signer=None):
     """
     Sign certificate signing request by it's common name
     """
@@ -323,16 +323,13 @@ def sign(common_name, skip_notify=False, skip_push=False, overwrite=False, profi
 
 
     # Sign with function below
-    cert, buf = _sign(csr, csr_buf, skip_notify, skip_push, overwrite, profile, signer)
+    cert, buf = _sign(csr, csr_buf, profile, skip_notify, skip_push, overwrite, signer)
 
     os.unlink(req_path)
     return cert, buf
 
-def _sign(csr, buf, skip_notify=False, skip_push=False, overwrite=False, profile="default", signer=None):
+def _sign(csr, buf, profile, skip_notify=False, skip_push=False, overwrite=False, signer=None):
     # TODO: CRLDistributionPoints, OCSP URL, Certificate URL
-    if profile not in config.PROFILES:
-        raise ValueError("Invalid profile supplied '%s'" % profile)
-
     assert buf.startswith(b"-----BEGIN ")
     assert isinstance(csr, CertificationRequest)
     csr_pubkey = asymmetric.load_public_key(csr["certification_request_info"]["subject_pk_info"])
@@ -370,10 +367,9 @@ def _sign(csr, buf, skip_notify=False, skip_push=False, overwrite=False, profile
         else:
             raise FileExistsError("Will not overwrite existing certificate")
 
-    # Sign via signer process
     dn = {u'common_name': common_name }
-    profile_server_flags, lifetime, dn["organizational_unit_name"], _ = config.PROFILES[profile]
+    if profile.ou:
-    lifetime = int(lifetime)
+        dn["organizational_unit_name"] = profile.ou
 
     builder = CertificateBuilder(dn, csr_pubkey)
     builder.serial_number = random.randint(
@@ -382,18 +378,12 @@ def _sign(csr, buf, skip_notify=False, skip_push=False, overwrite=False, profile
 
     now = datetime.utcnow()
     builder.begin_date = now - timedelta(minutes=5)
-    builder.end_date = now + timedelta(days=lifetime)
+    builder.end_date = now + timedelta(days=profile.lifetime)
     builder.issuer = certificate
-    builder.ca = False
+    builder.ca = profile.ca
-    builder.key_usage = set(["digital_signature", "key_encipherment"])
+    builder.key_usage = profile.key_usage
-
+    builder.extended_key_usage = profile.extended_key_usage
-    # If we have FQDN and profile suggests server flags, enable them
+    builder.subject_alt_domains = [common_name]
-    if server_flags(common_name) and profile_server_flags:
-        builder.subject_alt_domains = [common_name] # OpenVPN uses CN while StrongSwan uses SAN to match hostname of the server
-        builder.extended_key_usage = set(["server_auth", "1.3.6.1.5.5.8.2.2", "client_auth"])
-    else:
-        builder.subject_alt_domains = [common_name] # iOS demands SAN also for clients
-        builder.extended_key_usage = set(["client_auth"])
 
     end_entity_cert = builder.build(private_key)
     end_entity_cert_buf = asymmetric.dump_certificate(end_entity_cert)

certidude/cli.py

@@ -281,8 +281,8 @@ def certidude_enroll(fork, renew, no_wait, kerberos, skip_self):
             common_name = const.FQDN
         elif "$" in common_name:
             raise ValueError("Invalid variable '%s' supplied, only $HOSTNAME and $FQDN allowed" % common_name)
-        if not re.match(const.RE_HOSTNAME, common_name):
+        if not re.match(const.RE_COMMON_NAME, common_name):
-            raise ValueError("Invalid common name '%s' supplied" % common_name)
+            raise ValueError("Supplied common name %s doesn't match the expression %s" % (common_name, const.RE_COMMON_NAME))
 
 
         ################################
@@ -338,7 +338,7 @@ def certidude_enroll(fork, renew, no_wait, kerberos, skip_self):
 
         try:
             renewal_overlap = clients.getint(authority_name, "renewal overlap")
-        except NoOptionError: # Renewal not specified in config
+        except NoOptionError: # Renewal not configured
             renewal_overlap = None
 
         try:
@@ -1169,6 +1169,14 @@ def certidude_setup_authority(username, kerberos_keytab, nginx_config, country,
                 fh.write(env.get_template("server/builder.conf").render(vars()))
             click.echo("File %s created" % const.BUILDER_CONFIG_PATH)
 
+        # Create image builder config
+        if os.path.exists(const.PROFILE_CONFIG_PATH):
+            click.echo("Signature profile config %s already exists, remove to regenerate" % const.PROFILE_CONFIG_PATH)
+        else:
+            with open(const.PROFILE_CONFIG_PATH, "w") as fh:
+                fh.write(env.get_template("server/profile.conf").render(vars()))
+            click.echo("File %s created" % const.PROFILE_CONFIG_PATH)
+
         # Create directory with 755 permissions
         os.umask(0o022)
         if not os.path.exists(directory):
@@ -1347,12 +1355,12 @@ def certidude_list(verbose, show_key_type, show_extensions, show_path, show_sign
 
 @click.command("sign", help="Sign certificate")
 @click.argument("common_name")
-@click.option("--profile", "-p", default="default", help="Profile")
+@click.option("--profile", "-p", default="rw", help="Profile")
 @click.option("--overwrite", "-o", default=False, is_flag=True, help="Revoke valid certificate with same CN")
 def certidude_sign(common_name, overwrite, profile):
     from certidude import authority
     drop_privileges()
-    cert = authority.sign(common_name, overwrite=overwrite, profile=profile)
+    cert = authority.sign(common_name, overwrite=overwrite, profile=config.PROFILES[profile])
 
 
 @click.command("revoke", help="Revoke certificate")
@@ -1397,6 +1405,11 @@ def certidude_serve(port, listen, fork):
 
     from certidude import config
 
+    click.echo("Loading signature profiles:")
+    for profile in config.PROFILES.values():
+         click.echo("- %s" % profile)
+    click.echo()
+
     # Rebuild reverse mapping
     for cn, path, buf, cert, signed, expires in authority.list_signed():
         by_serial = os.path.join(config.SIGNED_BY_SERIAL_DIR, "%x.pem" % cert.serial_number)

certidude/config.py

@@ -2,7 +2,9 @@ import configparser
 import ipaddress
 import os
 from certidude import const
+from certidude.profile import SignatureProfile
 from collections import OrderedDict
+from datetime import timedelta
 
 # Options that are parsed from config file are fetched here
 
@@ -96,11 +98,22 @@ TOKEN_SECRET = cp.get("token", "secret").encode("ascii")
 # The API call for looking up scripts uses following directory as root
 SCRIPT_DIR = cp.get("script", "path")
 
-PROFILES = OrderedDict([[i, [j.strip() for j in cp.get("profile", i).split(",")]] for i in cp.options("profile")])
+from configparser import ConfigParser
+profile_config = ConfigParser()
+profile_config.readfp(open(const.PROFILE_CONFIG_PATH))
+
+PROFILES = dict([(key, SignatureProfile(key,
+    profile_config.get(key, "title"),
+    profile_config.get(key, "ou"),
+    profile_config.getboolean(key, "ca"),
+    profile_config.getint(key, "lifetime"),
+    profile_config.get(key, "key usage"),
+    profile_config.get(key, "extended key usage"),
+    profile_config.get(key, "common name"),
+    )) for key in profile_config.sections()])
 
 cp2 = configparser.RawConfigParser()
 cp2.readfp(open(const.BUILDER_CONFIG_PATH, "r"))
 IMAGE_BUILDER_PROFILES = [(j, cp2.get(j, "title"), cp2.get(j, "rename")) for j in cp2.sections()]
 
-
 TOKEN_OVERWRITE_PERMITTED=True

certidude/const.py

@@ -6,12 +6,15 @@ import sys
 
 KEY_SIZE = 1024 if os.getenv("TRAVIS") else 4096
 CURVE_NAME = "secp384r1"
-RE_HOSTNAME =  "^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])(@(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9]))?$"
+RE_FQDN =  "^(([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)+([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])?$"
+RE_HOSTNAME =  "^[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?$"
+RE_COMMON_NAME = "^[A-Za-z0-9\-\.\@]+$"
 
 RUN_DIR = "/run/certidude"
 CONFIG_DIR = "/etc/certidude"
 SERVER_CONFIG_PATH = os.path.join(CONFIG_DIR, "server.conf")
 BUILDER_CONFIG_PATH = os.path.join(CONFIG_DIR, "builder.conf")
+PROFILE_CONFIG_PATH = os.path.join(CONFIG_DIR, "profile.conf")
 CLIENT_CONFIG_PATH = os.path.join(CONFIG_DIR, "client.conf")
 SERVICES_CONFIG_PATH = os.path.join(CONFIG_DIR, "services.conf")
 SERVER_PID_PATH = os.path.join(RUN_DIR, "server.pid")

certidude/profile.py

@@ -0,0 +1,52 @@
+
+import click
+from datetime import timedelta
+from certidude import const
+
+class SignatureProfile(object):
+    def __init__(self, slug, title, ou, ca, lifetime, key_usage, extended_key_usage, common_name):
+        self.slug = slug
+        self.title = title
+        self.ou = ou or None
+        self.ca = ca
+        self.lifetime = lifetime
+        self.key_usage = set(key_usage.split(" ")) if key_usage else set()
+        self.extended_key_usage = set(extended_key_usage.split(" ")) if extended_key_usage else set()
+        if common_name.startswith("^"):
+            self.common_name = common_name
+        elif common_name == "RE_HOSTNAME":
+            self.common_name = const.RE_HOSTNAME
+        elif common_name == "RE_FQDN":
+            self.common_name = const.RE_FQDN
+        elif common_name == "RE_COMMON_NAME":
+            self.common_name = const.RE_COMMON_NAME
+        else:
+            raise ValueError("Invalid common name constraint %s" % common_name)
+
+    @classmethod
+    def from_cert(self, cert):
+        """
+        Derive signature profile from an already signed certificate, eg for renewal
+        """
+        lifetime = cert["tbs_certificate"]["validity"]["not_after"].native.replace(tzinfo=None) - \
+            cert["tbs_certificate"]["validity"]["not_before"].native.replace(tzinfo=None)
+        return SignatureProfile(
+            None, "Renewal", cert.subject.native.get("organizational_unit_name"),
+            cert.ca, lifetime.days,
+            " ".join(cert.key_usage_value.native),
+            " ".join(cert.extended_key_usage_value.native), "^")
+
+
+    def serialize(self):
+        return dict([(key, getattr(self,key)) for key in (
+            "slug", "title", "ou", "ca", "lifetime", "key_usage", "extended_key_usage", "common_name")])
+
+    def __repr__(self):
+        bits = []
+        if self.lifetime >= 365:
+            bits.append("%d years" % (self.lifetime / 365))
+        if self.lifetime % 365:
+            bits.append("%d days" % (self.lifetime % 365))
+        return "%s (title=%s, ca=%s, ou=%s, lifetime=%s, key_usage=%s, extended_key_usage=%s, common_name=%s)" % (
+            self.slug, self.title, self.ca, self.ou, " ".join(bits), self.key_usage, self.extended_key_usage, self.common_name)
+

certidude/static/views/request.html

@@ -30,11 +30,10 @@
       </button>
       <div class="dropdown-menu">
         {% for p in session.authority.signature.profiles %}
-          <a class="dropdown-item{% if p.server and not request.server %} disabled{% endif %}"
+          <a class="dropdown-item{% if not request.common_name.match(p.common_name) %} disabled{% endif %}"
-            {% if p.server and not request.server %}title="Resubmit with FQDN as common name"{% endif %}
+            {% if not request.common_name.match(p.common_name) %} title="Common name doesn't match expression {{ p.common_name }}"{% endif %}
-            href="#" onclick="javascript:$.ajax({url:'/api/request/{{request.common_name}}/?sha256sum={{ request.sha256sum }}&profile={{ p.name }}',type:'post'});">
+            href="#" onclick="javascript:$.ajax({url:'/api/request/{{request.common_name}}/?sha256sum={{ request.sha256sum }}&profile={{ p.slug }}',type:'post'});">
-            {% if p.title %}{{ p.title }} ({% if p.server %}server{% else %}client{% endif %}){% else %}
+            {{ p.title }}, expires in {{ p.lifetime }} days</a>
-            {% if p.server %}Server{% else %}Client{% endif %}{% endif %}, expires in {{ p.lifetime }} days</a>
         {% endfor %}
       </div>
     </div>

certidude/templates/server/profile.conf

@@ -0,0 +1,52 @@
+[DEFAULT]
+ou =
+lifetime = 120
+ca = false
+common name = RE_COMMON_NAME
+key usage = digital_signature key_encipherment
+extended key usage =
+
+[ca]
+title = Certificate Authority
+common name = ^ca
+ca = true
+key usage = key_cert_sign crl_sign
+extended key usage =
+lifetime = 1095
+
+[rw]
+title = Roadwarrior
+ou = Roadwarrior
+common name = RE_HOSTNAME
+extended key usage = client_auth
+
+[srv]
+title = Server
+;ou = Server
+common name = RE_FQDN
+lifetime = 365
+extended key usage = server_auth
+
+[gw]
+title = Gateway
+ou = Gateway
+common name = RE_FQDN
+renewable = true
+lifetime = 30
+extended key usage = server_auth 1.3.6.1.5.5.8.2.2 client_auth
+
+[ap]
+title = Access Point
+ou = Access Point
+common name = RE_HOSTNAME
+lifetime = 1825
+extended key usage = client_auth
+
+[mfp]
+title = Printers
+ou = Printers
+common name = ^mfp\-
+lifetime = 30
+extended key usage = client_auth
+
+

certidude/templates/server/server.conf

@@ -194,14 +194,6 @@ lifetime = 30
 # Secret for generating and validating tokens, regenerate occasionally
 secret = {{ token_secret }}
 
-[profile]
-# name, flags, lifetime, organizational unit, title
-default = client, 120, Roadwarrior, Roadwarrior
-gw = server, 30, Gateway, Gateway
-srv = server, 365, Server,
-ap = client, 1825, Access Point, Access Point
-mfp = client, 30, MFP, Printers
-
 [script]
 # Path to the folder with scripts that can be served to the clients, set none to disable scripting
 path = {{ script_dir }}