Move SSL util tests to pytest

util/security/test/test_ssl_util.py

@@ -0,0 +1,116 @@
+from tempfile import NamedTemporaryFile
+
+import pytest
+
+from OpenSSL import crypto
+
+from util.security.ssl import load_certificate, CertInvalidException, KeyInvalidException
+
+def generate_test_cert(hostname='somehostname', san_list=None, expires=1000000):
+  """ Generates a test SSL certificate and returns the certificate data and private key data. """
+
+  # Based on: http://blog.richardknop.com/2012/08/create-a-self-signed-x509-certificate-in-python/
+  # Create a key pair.
+  k = crypto.PKey()
+  k.generate_key(crypto.TYPE_RSA, 1024)
+
+  # Create a self-signed cert.
+  cert = crypto.X509()
+  cert.get_subject().CN = hostname
+
+  # Add the subjectAltNames (if necessary).
+  if san_list is not None:
+    cert.add_extensions([crypto.X509Extension("subjectAltName", False, ", ".join(san_list))])
+
+  cert.set_serial_number(1000)
+  cert.gmtime_adj_notBefore(0)
+  cert.gmtime_adj_notAfter(expires)
+  cert.set_issuer(cert.get_subject())
+
+  cert.set_pubkey(k)
+  cert.sign(k, 'sha1')
+
+  # Dump the certificate and private key in PEM format.
+  cert_data = crypto.dump_certificate(crypto.FILETYPE_PEM, cert)
+  key_data = crypto.dump_privatekey(crypto.FILETYPE_PEM, k)
+
+  return (cert_data, key_data)
+
+
+def test_load_certificate():
+  # Try loading an invalid certificate.
+  with pytest.raises(CertInvalidException):
+    load_certificate('someinvalidcontents')
+
+  # Load a valid certificate.
+  (public_key_data, _) = generate_test_cert()
+
+  cert = load_certificate(public_key_data)
+  assert not cert.expired
+  assert cert.names == set(['somehostname'])
+  assert cert.matches_name('somehostname')
+
+def test_expired_certificate():
+  (public_key_data, _) = generate_test_cert(expires=-100)
+
+  cert = load_certificate(public_key_data)
+  assert cert.expired
+
+def test_hostnames():
+  (public_key_data, _) = generate_test_cert(hostname='foo', san_list=['DNS:bar', 'DNS:baz'])
+  cert = load_certificate(public_key_data)
+  assert cert.names == set(['foo', 'bar', 'baz'])
+
+  for name in cert.names:
+    assert cert.matches_name(name)
+
+def test_wildcard_hostnames():
+  (public_key_data, _) = generate_test_cert(hostname='foo', san_list=['DNS:*.bar'])
+  cert = load_certificate(public_key_data)
+  assert cert.names == set(['foo', '*.bar'])
+
+  for name in cert.names:
+    assert cert.matches_name(name)
+
+  assert cert.matches_name('something.bar')
+  assert cert.matches_name('somethingelse.bar')
+  assert cert.matches_name('cool.bar')
+  assert not cert.matches_name('*')
+
+def test_nondns_hostnames():
+  (public_key_data, _) = generate_test_cert(hostname='foo', san_list=['URI:yarg'])
+  cert = load_certificate(public_key_data)
+  assert cert.names == set(['foo'])
+
+def test_validate_private_key():
+  (public_key_data, private_key_data) = generate_test_cert()
+
+  private_key = NamedTemporaryFile(delete=True)
+  private_key.write(private_key_data)
+  private_key.seek(0)
+
+  cert = load_certificate(public_key_data)
+  cert.validate_private_key(private_key.name)
+
+def test_invalid_private_key():
+  (public_key_data, _) = generate_test_cert()
+
+  private_key = NamedTemporaryFile(delete=True)
+  private_key.write('somerandomdata')
+  private_key.seek(0)
+
+  cert = load_certificate(public_key_data)
+  with pytest.raises(KeyInvalidException):
+    cert.validate_private_key(private_key.name)
+
+def test_mismatch_private_key():
+  (public_key_data, _) = generate_test_cert()
+  (_, private_key_data) = generate_test_cert()
+
+  private_key = NamedTemporaryFile(delete=True)
+  private_key.write(private_key_data)
+  private_key.seek(0)
+
+  cert = load_certificate(public_key_data)
+  with pytest.raises(KeyInvalidException):
+    cert.validate_private_key(private_key.name)