| Class | Rating | Complexity | Lines of code |
|---|---|---|---|
| Two_Factor_Core | 264 | 1,130 | |
| Two_Factor_Totp | 54 | 450 | |
| Two_Factor_FIDO_U2F | 51 | 196 | |
| u2flib_server\U2F | 49 | 194 | |
| Two_Factor_Email | 35 | 146 | |
| Two_Factor_Backup_Codes | 33 | 235 | |
| Two_Factor_FIDO_U2F_Admin | 27 | 198 | |
| Two_Factor_Provider | 21 | 57 | |
| Two_Factor_FIDO_U2F_Admin_List_Table | 11 | 84 | |
| Two_Factor_Compat | 7 | 13 | |
| Two_Factor_Dummy | 6 | 21 | |
| u2flib_server\RegisterRequest | 1 | 4 | |
| u2flib_server\Error | 1 | 3 | |
| u2flib_server\SignRequest | 0 | 0 | |
| u2flib_server\Registration | 0 | 0 |