Implementing django password validators for edX. This involves removing

the old validate password method and configuration values in favor of
AUTH_PASSWORD_VALIDATORS, a list of validators to use to check a
password. These include some that come straight from Django and some
that were written according to Django's specifications. This work also
included maintaining the current messaging as instruction text and
passing along restrictions for the password field.

common/djangoapps/student/forms.py

@@ -27,7 +27,7 @@ from openedx.core.djangoapps.user_api import accounts as accounts_settings
 from openedx.core.djangoapps.user_api.preferences.api import get_user_preference
 from student.message_types import PasswordReset
 from student.models import CourseEnrollmentAllowed, email_exists_or_retired
-from util.password_policy_validators import password_max_length, password_min_length, validate_password
+from util.password_policy_validators import edX_validate_password
 
 
 def send_password_reset_email_for_user(user, request):
@@ -193,7 +193,6 @@ class AccountCreationForm(forms.Form):
     """
 
     _EMAIL_INVALID_MSG = _("A properly formatted e-mail is required")
-    _PASSWORD_INVALID_MSG = _("A valid password is required")
     _NAME_TOO_SHORT_MSG = _("Your legal name must be a minimum of two characters long")
 
     # TODO: Resolve repetition
@@ -209,15 +208,9 @@ class AccountCreationForm(forms.Form):
             "max_length": _("Email cannot be more than %(limit_value)s characters long"),
         }
     )
-    password = forms.CharField(
-        min_length=password_min_length(),
-        max_length=password_max_length(),
-        error_messages={
-            "required": _PASSWORD_INVALID_MSG,
-            "min_length": _PASSWORD_INVALID_MSG,
-            "max_length": _PASSWORD_INVALID_MSG,
-        }
-    )
+
+    password = forms.CharField()
+
     name = forms.CharField(
         min_length=accounts_settings.NAME_MIN_LENGTH,
         error_messages={
@@ -288,7 +281,12 @@ class AccountCreationForm(forms.Form):
         """Enforce password policies (if applicable)"""
         password = self.cleaned_data["password"]
         if self.enforce_password_policy:
-            validate_password(password, username=self.cleaned_data.get('username'))
+            # Creating a temporary user object to test password against username
+            # This user should NOT be saved
+            username = self.cleaned_data.get('username')
+            email = self.cleaned_data.get('email')
+            temp_user = User(username=username, email=email) if username else None
+            edX_validate_password(password, temp_user)
         return password
 
     def clean_email(self):