import authnid sdn utils

atst/domain/authnid/utils.py

@@ -0,0 +1,13 @@
+import re
+
+
+# TODO: our sample SDN does not have an email address
+def parse_sdn(sdn):
+    try:
+        parts = sdn.split(",")
+        cn_string = [piece for piece in parts if re.match("^CN=", piece)][0]
+        cn = cn_string.split("=")[-1]
+        info = cn.split(".")
+        return {"last_name": info[0], "first_name": info[1], "dod_id": info[-1]}
+    except (IndexError, AttributeError):
+        raise ValueError("'{}' is not a valid SDN".format(sdn))

tests/domain/authnid/test_utils.py

@@ -0,0 +1,21 @@
+import pytest
+import atst.domain.authnid.utils as utils
+
+DOD_SDN_INFO = {
+        'first_name': 'ART',
+        'last_name': 'GARFUNKEL',
+        'dod_id': '5892460358'
+    }
+DOD_SDN = f"CN={DOD_SDN_INFO['last_name']}.{DOD_SDN_INFO['first_name']}.G.{DOD_SDN_INFO['dod_id']},OU=OTHER,OU=PKI,OU=DoD,O=U.S. Government,C=US"
+
+def test_parse_sdn():
+    parsed = utils.parse_sdn(DOD_SDN)
+    assert parsed.get('first_name') == 'ART'
+    assert parsed.get('last_name') == 'GARFUNKEL'
+    assert parsed.get('dod_id') == '5892460358'
+
+def test_parse_bad_sdn():
+    with pytest.raises(ValueError):
+        utils.parse_sdn('this has nothing to do with anything')
+    with pytest.raises(ValueError):
+        utils.parse_sdn(None)