diff --git a/authens/forms.py b/authens/forms.py
new file mode 100644
index 0000000..d69d460
--- /dev/null
+++ b/authens/forms.py
@@ -0,0 +1,61 @@
+from django import forms
+from django.contrib.auth import forms as auth_forms, authenticate
+from django.utils.translation import ugettext_lazy as _
+from django.utils import timezone
+
+
+def promo_choices():
+    return [(r, r) for r in range(2000, timezone.now().year + 1)]
+
+
+class OldCASAuthForm(forms.Form):
+    """ Adapts Django's AuthenticationForm to allow for OldCAS login.
+    """
+
+    cas_login = auth_forms.UsernameField(
+        label=_("Ancien login clipper"), max_length=1023
+    )
+    password = forms.CharField(
+        label=_("Mot de passe"),
+        strip=False,
+        widget=forms.PasswordInput(attrs={"autocomplete": "current-password"}),
+    )
+    entrance_year = forms.TypedChoiceField(
+        label=_("Promotion"), choices=promo_choices, coerce=int
+    )
+
+    def __init__(self, request=None, *args, **kwargs):
+        self.request = request
+        self.user_cache = None
+        super().__init__(*args, **kwargs)
+
+    def clean(self):
+        cas_login = self.cleaned_data.get("cas_login")
+        password = self.cleaned_data.get("password")
+        entrance_year = self.cleaned_data.get("entrance_year")
+
+        if cas_login is not None and password:
+            self.user_cache = authenticate(
+                self.request,
+                cas_login=cas_login,
+                password=password,
+                entrance_year=entrance_year,
+            )
+            if self.user_cache is None:
+                raise self.get_invalid_login_error()
+
+        return self.cleaned_data
+
+    def get_user(self):
+        # Necessary API for LoginView
+        return self.user_cache
+
+    def get_invalid_login_error(self):
+        return forms.ValidationError(
+            _(
+                "Aucun utilisateur n'existe avec ce clipper, cette promo et/ou ce mot"
+                "de passe. Veuillez vérifier votre saisie. Attention, tous les champs "
+                "sont sensibles à la casse !"
+            ),
+            code="invalid_login",
+        )
diff --git a/authens/urls.py b/authens/urls.py
index 7b13310..1fe4eb9 100644
--- a/authens/urls.py
+++ b/authens/urls.py
@@ -7,5 +7,6 @@ urlpatterns = [
     path("login/choose", views.LoginSwitchView.as_view(), name="login"),
     path("login/cas", views.CASLoginView.as_view(), name="login.cas"),
     path("login/pwd", views.PasswordLoginView.as_view(), name="login.pwd"),
+    path("login/oldcas", views.OldCASLoginView.as_view(), name="login.oldcas"),
     path("logout", views.LogoutView.as_view(), name="logout"),
 ]
diff --git a/authens/views.py b/authens/views.py
index 14ead4e..d5641a5 100644
--- a/authens/views.py
+++ b/authens/views.py
@@ -9,6 +9,7 @@ from django.shortcuts import redirect
 from django.utils.translation import gettext_lazy as _
 
 from authens.utils import get_cas_client
+from authens.forms import OldCASAuthForm
 
 
 class NextPageMixin:
@@ -79,6 +80,11 @@ class PasswordLoginView(auth_views.LoginView):
     template_name = "authens/pwd_login.html"
 
 
+class OldCASLoginView(auth_views.LoginView):
+    template_name = "authens/old_cas_login.html"
+    authentication_form = OldCASAuthForm
+
+
 class LogoutView(auth_views.LogoutView):
     """Logout view of AuthENS.