279         let mut multi: Option<u8> = None;  in decode_alias()
286                     None  in decode_alias()
288                 (b'+'..=b'.', None) => Some((c - b'+') << 6),  in decode_alias()
289                 (b'0'..=b'~', None) => {  in decode_alias()
291                     None  in decode_alias()
321             _ => None,  in new_from_stream()
385             (blob_types::SUPER_KEY, _, None) | (blob_types::SUPER_KEY_AES256, _, None) => {  in new_from_stream()
419                     decrypt(&data, &iv, &tag, None, None)  in new_from_stream_decrypt_with()
560             None => return Ok(Vec::new()),  in read_characteristics_file()
584             _ => None,  in read_characteristics_file()
623                 return Ok(None);  in read_km_blob_file()
634                 ErrorKind::NotFound => return Ok(None),  in read_generic_blob()
646             None => return Ok(None),  in read_legacy_keystore_entry()
656                 None  in read_legacy_keystore_entry()
665             None => return Ok(()),  in remove_legacy_keystore_entry()
722             None  in extract_legacy_alias()
761             return None;  in make_legacy_keystore_entry_filename()
842         None  in extract_keystore_alias()
910                     return None;  in list_keystore_entries_for_uid()
1024                                 None => {  in load_by_uid_alias()
1055             None => None,  in load_by_uid_alias()
1063                 None => None,  in load_by_uid_alias()
1075             None => None,  in load_by_uid_alias()
1121             None => None,  in load_super_key()
1233                 assert_eq!(salt, None);  in read_aes_gcm_encrypted_key_blob_test()
1234                 assert_eq!(key_size, None);  in read_aes_gcm_encrypted_key_blob_test()
1278         let _db = crate::database::KeystoreDB::new(temp_dir.path(), None)  in test_is_empty()
1344         let mut db = crate::database::KeystoreDB::new(temp_dir.path(), None)?;  in test_legacy_blobs()
1385             (None, None, None),  in test_legacy_blobs()
1389             (None, None, None),  in test_legacy_blobs()