Implement python manage.py gendevfedmsgcert command

manage.py

@@ -26,6 +26,7 @@ import flask_migrate
 import logging
 import os
 import ssl
+from shutil import rmtree
 
 from rida import app, conf, db
 from rida.config import Config
@@ -96,6 +97,105 @@ def upgradedb():
     flask_migrate.upgrade()
 
 
+@manager.command
+def gendevfedmsgcert(pki_dir='/opt/fm-orchestrator/pki', force=False):
+    """
+    Creates a CA, a certificate signed by that CA, and generates a CRL.
+    """
+    from OpenSSL import crypto
+
+    if os.path.exists(pki_dir):
+        if force:
+            rmtree(pki_dir)
+        else:
+            print('The directory "{}" already exists'.format(pki_dir))
+            return
+
+    os.mkdir(pki_dir)
+
+    ca_crt_path = os.path.join(pki_dir, 'ca.crt')
+    ca_key_path = os.path.join(pki_dir, 'ca.key')
+    msg_key_path = os.path.join(pki_dir, 'msg_signing.key')
+    msg_crt_path = os.path.join(pki_dir, 'msg_signing.crt')
+    ca_crl = os.path.join(pki_dir, 'ca.crl')
+
+    # Create a key pair for the CA
+    ca_key = crypto.PKey()
+    ca_key.generate_key(crypto.TYPE_RSA, 2048)
+
+    with open(ca_key_path, 'w') as ca_key_file:
+        ca_key_file.write(
+            crypto.dump_privatekey(crypto.FILETYPE_PEM, ca_key))
+
+    # Create a self-signed CA cert
+    ca_cert = crypto.X509()
+    ca_subject = ca_cert.get_subject()
+    ca_subject.C = 'US'
+    ca_subject.ST = 'MA'
+    ca_subject.L = 'Boston'
+    ca_subject.O = 'Development'
+    ca_subject.CN = 'Dev-CA'
+    ca_cert.set_serial_number(1)
+    ca_cert.gmtime_adj_notBefore(0)
+    ca_cert.gmtime_adj_notAfter(315360000)  # 10 years
+    ca_cert.set_issuer(ca_cert.get_subject())
+    ca_cert.set_pubkey(ca_key)
+    ca_cert.add_extensions([
+        crypto.X509Extension('basicConstraints', True, 'CA:true')])
+    ca_cert.sign(ca_key, 'sha256')
+
+    with open(ca_crt_path, 'w') as ca_crt_file:
+        ca_crt_file.write(
+            crypto.dump_certificate(crypto.FILETYPE_PEM, ca_cert))
+
+    # Create a key pair for the message signing cert
+    msg_key = crypto.PKey()
+    msg_key.generate_key(crypto.TYPE_RSA, 2048)
+
+    with open(msg_key_path, 'w') as msg_key_file:
+        msg_key_file.write(
+            crypto.dump_privatekey(crypto.FILETYPE_PEM, msg_key))
+
+    # Create a cert signed by the CA
+    msg_cert = crypto.X509()
+    msg_cert_subject = msg_cert.get_subject()
+    msg_cert_subject.C = 'US'
+    msg_cert_subject.ST = 'MA'
+    msg_cert_subject.L = 'Boston'
+    msg_cert_subject.O = 'Development'
+    msg_cert_subject.CN = 'localhost'
+    msg_cert.set_serial_number(2)
+    msg_cert.gmtime_adj_notBefore(0)
+    msg_cert.gmtime_adj_notAfter(315360000)  # 10 years
+    msg_cert.set_issuer(ca_cert.get_subject())
+    msg_cert.set_pubkey(msg_key)
+    cert_extensions = [
+        crypto.X509Extension(
+            'keyUsage', True,
+            'digitalSignature, keyEncipherment, nonRepudiation'),
+        crypto.X509Extension('extendedKeyUsage', True, 'serverAuth'),
+        crypto.X509Extension('basicConstraints', True, 'CA:false'),
+        crypto.X509Extension('crlDistributionPoints', False,
+                             'URI:http://localhost/crl/ca.crl'),
+        crypto.X509Extension('authorityInfoAccess', False,
+                             'caIssuers;URI:http://localhost/crl/ca.crt'),
+        crypto.X509Extension('subjectKeyIdentifier', False, 'hash',
+                             subject=ca_cert)
+    ]
+    msg_cert.add_extensions(cert_extensions)
+    msg_cert.sign(ca_key, 'sha256')
+
+    with open(msg_crt_path, 'w') as msg_crt_file:
+        msg_crt_file.write(
+            crypto.dump_certificate(crypto.FILETYPE_PEM, msg_cert))
+
+    # Generate the CRL
+    with open(ca_crl, 'w') as ca_crl_file:
+        ca_crl_file.write(
+            crypto.CRL().export(ca_cert, ca_key, type=crypto.FILETYPE_PEM,
+                                days=3650, digest='sha256'))
+
+
 @manager.command
 def runssl(host=conf.host, port=conf.port, debug=False):
     """ Runs the Flask app with the HTTPS settings configured in config.py