rfid

Can I recover a MIFARE Classic card?

由 别来无恙 提交于 2019-11-28 11:41:02
问题 My problem is that I used the "read and write" example on the Arduino to re-write an RFID card (MIFARE Classic 1K) block by block. I started writing at block 4. At block 7 it stopped and now I can't read any sector. I wrote zeros to each block. The DumpToSerial function just prints for every sector PCD_Authenticate() failed: Timeout in communication. It can still read the UID, the SAK, and the PICC type. Did I destroy the card or can I recover it? Some more info: Card: MIFARE Classic 1K

crc16 implementation java

由 寵の児 提交于 2019-11-28 11:32:26
I am having problems with calculating CRC-16 implementation of a byte array in java. Basically I am trying to send bytes to a RFID that starts writing to a tag. I can see the checksum value of array by looking tcpdump command on mac. But my goal is to generate it by myself. Here is my byte array which should generate 0xbe,0xd9: byte[] bytes = new byte[]{(byte) 0x55,(byte) 0x08,(byte) 0x68, (byte) 0x14, (byte) 0x93, (byte) 0x01, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x06, (byte) 0x00, (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x13, (byte) 0x50, (byte) 0x00,

Android: Authenticating with NXP MiFare Ultralight C

由 自古美人都是妖i 提交于 2019-11-28 10:39:57
I have been trying for more than a week to make an Android phone authenticate with a Mifare Ultralight C. I have confirmed I can write to the tag (by writing to an unsecured memory page and then reading what I wrote). I can also write to the key pages (44-47) and have written 0x00 for all 16 key bytes. When I try to authenticate, the following is an example of the data involved during one exchange - it is from a log written by my application. Can anyone tell me if I am doing something incorrect? I AM under non-disclosure and have access to the full data sheets. Note that the hexadecimal

Calling a function in another thread C#

由 我的未来我决定 提交于 2019-11-28 10:11:17
问题 I don't know how to put this but I'll try my best. I have a Windows form application which uses a webcam to take a photo of a user which works fine, I'm using the directshownet library found here http://directshownet.sourceforge.net/ and have used the DxSnap sample to take the photo. The next part of the application uses an RFID tag reader that once a tag is scanned, it calls the take photo method. And this is where the problem is coming in, because the RFID listen method is run in a separate

Connection error when reading Android NfcV tags

由 别等时光非礼了梦想. 提交于 2019-11-28 06:36:27
问题 I have an Android app that reads NFC tags. Everything works fine on the LG Nexus 4 but on Samsung Galaxy S5 I only get I/O exceptions (tested on multiple phones). So, tags are of type NfcV and I get the I/O exception when calling connect() on the NfcV (further down it is error code -5 ERROR_CONNECT). NFC TagInfo by NXP can read the the memory content of the tag on the SG5S - are there other ways of reading NfcV tags than with connect() and transceive() ? What differences between NFC chips

Set own authentication keys MiFare Classic with APDU C#

由 社会主义新天地 提交于 2019-11-27 16:56:10
问题 I'm using the SMARTCARD API from CardWerk. How can I change the default key ( (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF ) using an APDU? The APDU consits of a CLASS, an INSTRUCTION, P1, P2. I have been reading documentation but I'm unable to find what parameters do I need to change the actual key to a new one. 回答1: The process for changing the keys of a MIFARE Classic card is like this: Authenticate to the secor for which you want to change the key. Read the

Reading RFID with Android phones

由 对着背影说爱祢 提交于 2019-11-27 09:21:51
问题 I did enough research on reading RFID tags using Android phones(smart phones). My understanding of this is that for NFC-enabled smart phones (Nexus S) it is possible to read RFID tags, but there are restrictions. For non-NFC-enabled Androids we need a RFID reader to which we can communicate from Android using Bluetooth. My question is: What are the SDK which we use for reading RFID tag from Android Phone(NFC enabled)? If I have to read using Non NFC enabled phone, is there any standard reader

Locking mechanism of Mifare Classic 1K

由 巧了我就是萌 提交于 2019-11-27 09:19:25
The procedure of Mifare Classic 1K is Polling for tags Authenticate those tags If authentication succeded then read/write. I already completed those procedures and also read and write data from specific sectors. Command for Polling for tags is new byte[] { (byte) 0xFF, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x04, (byte) 0xD4, (byte) 0x4A, (byte) 0x01, (byte) 0x00 } Authentication command is new byte[] { (byte) 0xFF, (byte) 0x86, (byte) 0x00, (byte) 0x00, (byte) 0x05, (byte) 0x01,(byte) 0x00, (byte) 0x04, (byte) 0x60,(byte) 0x00 }; Here "(byte) 0x01" is the Sector 1 And Write on Sector 1

Android and Symbian NFC mobile development questions and answers (FAQ)

由 ∥☆過路亽．° 提交于 2019-11-27 07:09:04
Let’s share on a common place ideas about the NFC development, technology… I warmly welcome any comments you might have – either about the Android or Symbian SDK or about the NFC in general. From my point of view the general question is what we can develop, i.e. what kinds of applications can we bring to the market with the NFC technology? And how can we, developers, earn money and benefit from the NFC? I think there is an expectation the NFC will open the door for numerous services and possibilities for developers – but is that true? The difference between the NFC and other wireless

crc16 implementation java

由 时间秒杀一切 提交于 2019-11-27 06:14:30
问题 I am having problems with calculating CRC-16 implementation of a byte array in java. Basically I am trying to send bytes to a RFID that starts writing to a tag. I can see the checksum value of array by looking tcpdump command on mac. But my goal is to generate it by myself. Here is my byte array which should generate 0xbe,0xd9: byte[] bytes = new byte[]{(byte) 0x55,(byte) 0x08,(byte) 0x68, (byte) 0x14, (byte) 0x93, (byte) 0x01, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
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