區分Mifare Ultralight與Mifare Ultralight C

有沒有可靠的方法來確定RFID卡是Mifare Ultralight還是Mifare Ultralight C？區分Mifare Ultralight與Mifare Ultralight C

到目前爲止，我發現的唯一方法是利用這兩張卡的大小差異來發出一個讀取命令超出較小的邊界。但它看起來像一個黑客，我假設如果卡使用Ultralight C身份驗證機制讀取命令可能會失敗。

const char* mifare_ultralight_identification(const nfc_target_info_t nti) 
{ 
    byte_t abtCmd[2]; 
    byte_t abtRx[265]; 
    size_t szRxLen; 

    abtCmd[0] = 0x30; // MIFARE Ultralight READ command 
    abtCmd[1] = 0x10; // block address (1K=0x00..0x39, 4K=0x00..0xff) 

    if (!nfc_initiator_transceive_dep_bytes(pnd,abtCmd,2,abtRx,&szRxLen)) { 
    // READ command of 0x10 failed, we consider that Ultralight does have 0x10 address, so it's a "simple" Ultralight (i.e. not a Ultralight C) 
    // When a READ failed, the tag returns in HALT state, so we need to reselect tag 
    nfc_initiator_select_passive_target(pnd, NM_ISO14443A_106, nti.nai.abtUid, nti.nai.szUidLen, NULL); 
    return ""; 
    } 
    return " C"; 
}

Source

來源

2012-08-10 mibollma