Add support for changing password via PAM

plugins/functions/fmod_pam_authentication.py

@@ -3,7 +3,7 @@ from settingsd import const
 from settingsd import config
 from settingsd import service
 from settingsd import shared
-from pam import pam
+from pamela import authenticate, change_password, PAMError
 
 
 SERVICE_NAME = "pam_authentication"
@@ -12,8 +12,22 @@ SERVICE_NAME = "pam_authentication"
 class PamAuthentication(service.FunctionObject) :
 	@service.functionMethod("pam", in_signature="ss", out_signature="b")
 	def authenticate(self, login, password):
-		authenticator = pam()
-		return authenticator.authenticate(login, password)
+		try:
+			authenticate(login, password)
+			return True
+		except PAMError:
+			return False
+	
+	@service.functionMethod("pam", in_signature="sss", out_signature="b")
+	def change_password(self, login, old_password, new_password):
+		if len(new_password) == 0:
+			return False
+		try:
+			change_password(login, new_password)
+			return True
+		except PAMError as err:
+			print(err)
+			return False
 
 
 class Service(service.Service) :