Added config file and session auth

.gitignore

@@ -100,5 +100,8 @@ ENV/
 # mypy
 .mypy_cache/
 
-# Ignore generated models
+# generated models
 /models
+
+# config file
+config.py

README.md

@@ -0,0 +1,10 @@
+# Ubuntu Howdy
+
+Windows Hello™ style authentication for Ubuntu
+
+Notes:
+
+tail /var/log/auth.log
+
+/etc/pam.d/sudo
+auth sufficient pam_python.so /path/to/pam.py

compair.py

@@ -3,13 +3,12 @@ import cv2
 import sys
 import os
 
+import config
+
 def stop(status):
 	video_capture.release()
 	sys.exit(status)
 
-path = ""
-distance = 3
-
 try:
 	if not isinstance(sys.argv[1], str):
 		sys.exit(1)
@@ -17,19 +16,18 @@ except IndexError:
 	sys.exit(1)
 
 user = sys.argv[1]
-
 # Get a reference to webcam #0 (the default one)
-video_capture = cv2.VideoCapture(1)
+video_capture = cv2.VideoCapture(config.device_id)
 
 encodings = []
 
 try:
 	for exposure in ["L", "M", "S"]:
-		ref = face_recognition.load_image_file(path + "/" + user + "/" + exposure + ".jpg")
+		ref = face_recognition.load_image_file(os.path.dirname(__file__) + "/models/" + user + "/" + exposure + ".jpg")
 		enc = face_recognition.face_encodings(ref)[0]
 		encodings.append(enc)
 except FileNotFoundError:
-	stop(802)
+	stop(10)
 
 tries = 0
 
@@ -44,10 +42,10 @@ while True:
 		matches = face_recognition.face_distance(encodings, face_encoding)
 
 		for match in matches:
-			if match < distance:
+			if match < config.certainty:
 				stop(0)
 
-	if tries => 100:
-		stop(801)
+	if tries > config.frame_count:
+		stop(11)
 
 	tries += 1

config_template.py

@@ -0,0 +1,10 @@
+# The certainty of the detected face belonging to the user of the account
+# On a scale from 1 to 10, values above 5 are not recomended
+certainty = 3
+
+# The number of frames to capture and to process before timing out
+frame_count = 120
+
+# The /dev/videoX id to capture frames from
+# On my laptop, video0 is the normal camera and video1 is the IR version
+device_id = 1

pam.py

@@ -2,17 +2,30 @@ import subprocess
 import sys
 import os
 
-def pam_sm_authenticate(pamh, flags, args):
-	status = subprocess.call(["python3", "compair.py", pamh.get_user()])
+def doAuth(pamh):
+	status = subprocess.call(["python3", "/compair.py", pamh.get_user()])
 
-	if status == 801:
-		print("Timeout reached, ould not find a known face")
+	if status == 10:
+		print("No face model is known for this user, aborting")
 		return pamh.PAM_SYSTEM_ERR
-	if status == 34:
-		print("No face model is known for this user")
+	if status == 11:
+		print("Timeout reached, ould not find a known face")
 		return pamh.PAM_SYSTEM_ERR
 	if status == 0:
 		print("Identified face as " + os.environ.get("USER"))
 		return pamh.PAM_SUCCESS
 
+	print(status)
 	return pamh.PAM_SYSTEM_ERR
+
+def pam_sm_authenticate(pamh, flags, args):
+	return doAuth(pamh)
+
+def pam_sm_open_session(pamh, flags, args):
+	return doAuth(pamh)
+
+def pam_sm_close_session(pamh, flags, argv):
+	return pamh.PAM_SUCCESS
+
+def pam_sm_setcred(pamh, flags, argv):
+	return pamh.PAM_SUCCESS