TLV is the short for Type Length Value. It is a technique mostly used to encode optional information within data communication protocols.
Questions tagged [tlv]
109 questions
0
votes
0 answers
Generate QR code from specific specs in Javascript
i am working in ELectronJS app that generate QR code from speceific requirement given by the client,
it is mandatory to generate and print QR code encoded in Base64 format with up to 500 characters.
The QR code fields shall be encoding in…
Maged
- 11
- 2
0
votes
2 answers
How to parse nested TLV structures
This is TLV code：
30 3e 31 0b 30 09 06 03 55 04 06 13 02 50 4c 31 1b 30 19 06 03 55 04 0a 13 12
55 6e 69 7a 65 74 6f 20 53 70 2e 20 7a 20 6f 2e 6f 2e 31 12 30 10 06 03 55 04
03 13 09 43 65 72 74 75 6d 20 43 41
From this figure, we can know how…
malu
- 11
- 1
0
votes
0 answers
python: print a TLV value from packet as a string
I'm reading data over netlink socket. One of the TLVs contain IPv4 address as a sequence of 4 bytes, e.g. 0x01 0x02 0x03 0x0b for address 1.2.3.11 :
import socket
...
s = socket.socket(socket.AF_NETLINK, socket.SOCK_RAW,…
Mark
- 6,052
- 8
- 61
- 129
0
votes
0 answers
How to receive message_payload using https://github.com/farhadi/node-smpp?
We are using node-smpp and struggling with receiving long (over 160 characters) messages from a SMPP sever. Does anyone have any idea if we should enable some option to get this message payload?
0
votes
3 answers
How to Decode Base64 to TLV in PHP
I am building an inhouse Invoicing solution for my company. The government requires us to create QR Code fields encoded in Tag-Length-Value (TLV) format.
The TLV encoding shall be as follows:
Tag: the tag value as mentioned above stored in one…
Taha Khan
- 164
- 3
- 16
0
votes
2 answers
TLV Macro expansion raises warning: Assignment makes pointer from integer without a cast
My TLV structure can hold string or integer. I'm trying to create a macro that handles them both.
The example below runs as expected, but it compiles with warnings from the MACRO expansion. I understand the precompiler cannot know what type of…
Matt Muggeridge
- 465
- 3
- 11
0
votes
1 answer
Decoding BER TLV
I have a problem decoding this TLV
Template Tag (7001) 2 bytes
Length Tag (0020) 2 bytes
Value is another TLV
Tag(e101) Length (000f) Value(373834313938353338353236313430)
Tag(e102) Length (0009)…
0
votes
1 answer
Can not Parse EMV TAG Issuer Application Data 9F10
I have this Issuer Application Data I need to parse
Issuer Application Data = 06001103A020000A0100000000002221DFBB
When I parse I thing the Cryptogram Version is 0x11 = which is 17 (Is this right ?)
Secondly, when I look for documents online, I…
Fatih Enes
- 1
- 1
0
votes
1 answer
TLV VLAN corrupted or missing for STP via scapy
i need to generate an STP traffic but when I capture it via wireshark it says that tlv (tag-length-value) of the vlan is missing and tlv record is truncated prematurely
this is my code:
sendp(Dot3(dst="01:00:0c:cc:cc:cd",…
newbie
- 646
- 8
- 27
0
votes
1 answer
PDOL enough for online processing
I Have successfully generated a ARQC by fulfilling the PDOL requirements as requested by the ICC (VISA). I would like to force all transactions with online PIN validation, irrespective of floor limits, pin try limits etc.
Do I need to still do…
Blackbox First
- 67
- 1
- 1
- 7
0
votes
0 answers
How to write a TLV[TAG_MAX_ATTEMPTS]?
I am using a smartcard with JCOP 4.7 Java applet on it. I want to create an authentication object, for example a UserID. The writeUserID command Has the below arguments:
CLA, INS, P1, P2, Lc, TLV[TAG_POLICY], TLV[TAG_MAX_ATTEMPTS], TLV[TAG_1],…
Priyanka.P
- 3
- 2
0
votes
1 answer
what is meant by the things inside the square bracket infront of a variable in ASN.1 data object?
euiccSignature1 [APPLICATION 55] OCTET STRING, --EUICC_Sign1, tag 5F37
the above is what I have in an ASN.1 data object. I'm going to DER encode it. can somebody please tell me what I have to do with that "tag 5F37" and what is inside that…
anonymous
- 57
- 7
0
votes
2 answers
How to parse ASN1 in Ruby
Still a little confused with ASN1. I am parsing a RFC3161 timestamp response with ruby openssl, so I know the specification. I am pretty sure the structure is getting loaded correctly but I'm confused on how to find the pieces/keys that I want. I…
user8897013
- 443
- 4
- 15
0
votes
1 answer
Get all packet(uint) from byte array
I am working on one BLE project
I am getting following data(In Byte array while scanning BLE device) as an advertising data 0x02011A09094F6E65506C757332020AF9 you can see in the screenshot there is three packet, can anyone help me how can get all…
DynamicMind
- 4,240
- 1
- 26
- 43
0
votes
1 answer
ANTLR4 and parsing a type-length-value format
I am trying create a grammar for a format that follows a type-length-value convention. Can ANTLR4 read in a length value and then parse that many characters?
poke
- 3
- 1