| Class | Rating | Complexity | Lines of code |
|---|---|---|---|
| Two_Factor_Core | 240 | 1,038 | |
| Two_Factor_Totp | 52 | 421 | |
| Two_Factor_FIDO_U2F | 50 | 189 | |
| u2flib_server\U2F | 49 | 194 | |
| Two_Factor_Email | 33 | 133 | |
| Two_Factor_Backup_Codes | 31 | 223 | |
| Two_Factor_FIDO_U2F_Admin | 26 | 195 | |
| Two_Factor_Provider | 18 | 47 | |
| Two_Factor_FIDO_U2F_Admin_List_Table | 11 | 84 | |
| Two_Factor_Compat | 6 | 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 |