app: Add support for multiple CRLs.

caucase.util.load_crl API changed in an incompatible way in caucase 0.9.9 .
This change fixes the API breakage and adds support for mor than one CRL
in kedifa.app.http .

kedifa/app.py

@@ -302,13 +302,14 @@ class Kedifa(object):
   GET (no auth required) one time access URL which returns auth key
   content-type: text/plain
 """
-  def loadCertificate(self, ca_certificate, crl):
+  def loadCertificate(self, ca_certificate_path, crl_path):
     self.ca_certificate_list = [
       caucase.utils.load_ca_certificate(x)
-      for x in caucase.utils.getCertList(ca_certificate.name)]
+      for x in caucase.utils.getCertList(ca_certificate_path)]
 
-    self.crl = caucase.utils.load_crl(
-      crl.read(), self.ca_certificate_list).public_bytes(encoding=Encoding.PEM)
+    self.crl_list = [
+      caucase.utils.load_crl(x, self.ca_certificate_list)
+      for x in caucase.utils.getCRLList(crl_path)]
 
   def __init__(self, pocket, ca_certificate, crl):
     self.pocket_db = SQLite3Storage(pocket)
@@ -348,10 +349,7 @@ class Kedifa(object):
       caucase.utils.load_certificate(
         environ.get('SSL_CLIENT_CERT', b''),
         trusted_cert_list=self.ca_certificate_list,
-        crl=caucase.utils.load_crl(
-          self.crl,
-          self.ca_certificate_list,
-        ),
+        crl_list=self.crl_list,
       )
     except (caucase.exceptions.CertificateVerificationError, ValueError):
       raise Unauthroized
@@ -506,8 +504,7 @@ class Reloader(object):
     self.app = app
 
   def handle(self, signum, frame):
-    with open(self.ca_certificate_path) as ca, open(self.crl_path) as crl:
-      self.app.loadCertificate(ca, crl)
+    self.app.loadCertificate(self.ca_certificate_path, self.crl_path)
     ssl_context = getSSLContext(
       self.server_key_path, self.ca_certificate_path, self.crl_path)
     ssl_socket = self.httpd.socket
@@ -574,7 +571,7 @@ def http(host, port, pocket, certificate, ca_certificate, crl, pidfile,
   pid = str(os.getpid())
   pidfile.write(pid)
   pidfile.close()
-  kedifa = Kedifa(pocket, ca_certificate, crl)
+  kedifa = Kedifa(pocket, ca_certificate.name, crl.name)
   if ':' in host:
     access_format = 'https://[%s]:%s/'
   else: