libffi-devel addition to docker test

Author: RedProkofiev

Dockerfile

@@ -14,6 +14,9 @@ RUN yum -y install python-pip
 # Install the system requirements of python-ldap
 RUN yum -y install gcc python-devel openldap-devel
 
+# Install libffi, a requirement of openssl
+RUN yum -y install libffi-devel && yum clean all
+
 # Install the system requirements of ssm
 RUN yum -y install openssl
 

setup.py

@@ -51,12 +51,12 @@ def main():
           download_url='https://github.com/apel/ssm/releases',
           license='Apache License, Version 2.0',
           install_requires=[
-            #   'cryptography==3.3.0',
+              'cryptography==3.3.0',
               'stomp.py<5.0.0',
               'python-ldap<3.4.0',
               'python-daemon<=2.3.0',
               'setuptools',
-            #   'pyopenssl',
+              'pyopenssl<=21.0.0',
           ],
           extras_require={
               'AMS': ['argo-ams-library', 'certifi<2020.4.5.2', ],