how to parse 3 byte length BER-TLV TAG
来源： https://stackoverflow.com/questions/60792080/how-to-parse-3-byte-length-ber-tlv-tag
tlv
how to parse 3 byte length BER-TLV TAG
来源： https://stackoverflow.com/questions/60792080/how-to-parse-3-byte-length-ber-tlv-tag
Parsing PDOL for GET PROCESSING OPTIONS command in EMV transaction
问题 I am trying to build a correctly formatted GET PROCESSING OPTIONS command to be sent to a contactless EMV card. This post has been very helpful but I just need to know a little more detail. When parsing the PDOL, is it safe to assume that each tag is 2 bytes in length, followed by the size of the data expected in return? For example, the PDOL 9F66049F02069F37049F1A02 is broken into 9F66 04 , 9F02 06 , etc. each with 2 byte tags and 1 byte for the expected length of the data value. Is it safe
sync Contacts between iPhone(also Android) and server
问题 I am in trouble and Need your help. 1st Question: My IOS app has to send/receive datas to/from a Web Server. The server defined using the TCP and the data format is TLV; I have never used TLV before, and have no idea how to solve this problem. As for TCP, I decide to use cocoaAsyncSocket, it's simple to deal with TCP transports; But I send/receive datas all in the (NSData*) format, I don't know if the server can decode it correctly. 2nd Question: I am also trying to sync Contacts between
How to interpret NDEF content on Mifare Classic 1K
问题 I write a text to a Mifare Classic 1K tag using the NFC Tools app on my Android device (through the built-in NFC reader). This text is "moretto" (my last name). Then, I'm trying to read this text (NDEF format) using the NFC reader ACR1255U with the library provided by ACS. I am able to get following: Read block 4: FF B0 00 04 10 response: 0000030ED1010A5402656E6D6F726574 9000 Read block 5: FF B0 00 05 10 response: 746FFE00000000000000000000000000 9000 I know that FE indicates the end of
EMV JavaCard APDU Response in TLV Format
问题 I have a simple JavaCard HelloWorld script, i execute it in JCIDE with virtual reader then i send apdu commands from pyapdutool: 00a404000e aid then 80000000 and i receive javacard string, everything runs fine. My question is: how can i return a tlv format data instead of that response ? I was looking in the emv book 4.3 about this and also on google haven't found a single example to implement emv tlv tags in javacard script. Can someone put me on correct path to understand this ? package
EMV JavaCard APDU Response in TLV Format
I have a simple JavaCard HelloWorld script, i execute it in JCIDE with virtual reader then i send apdu commands from pyapdutool: 00a404000e aid then 80000000 and i receive javacard string, everything runs fine. My question is: how can i return a tlv format data instead of that response ? I was looking in the emv book 4.3 about this and also on google haven't found a single example to implement emv tlv tags in javacard script. Can someone put me on correct path to understand this ? package helloworld; import javacard.framework.*; public class helloworld extends Applet { private static final
Parsing PDOL for GET PROCESSING OPTIONS command in EMV transaction
I am trying to build a correctly formatted GET PROCESSING OPTIONS command to be sent to a contactless EMV card. This post has been very helpful but I just need to know a little more detail. When parsing the PDOL, is it safe to assume that each tag is 2 bytes in length, followed by the size of the data expected in return? For example, the PDOL 9F66049F02069F37049F1A02 is broken into 9F66 04 , 9F02 06 , etc. each with 2 byte tags and 1 byte for the expected length of the data value. Is it safe to assume that each tag is 2 bytes in length when parsing? No, you can't expect that each tag consists
Is there a Java parser for BER-TLV?
问题 I'm new to Java, so I would like to use the standard solution for, I think, the standard task. The length of tags and values are not known. 回答1: Tutorial in here gives a tips on how to parse BER-TLV. Using JACCAL 回答2: You can use this BER-TLV parser: source code on git or download jar. Examples: How to parse byte[] bytes = HexUtil.parseHex("50045649534157131000023100000033D44122011003400000481F"); BerTlvParser parser = new BerTlvParser(LOG); BerTlvs tlvs = parser.parse(bytes, 0, bytes