Parse TLV

Category: Serialisation

Status: Registered and callable in the CyberChef 11.3.0 compatibility inventory.

Input / output: ArrayBuffer → JSON

Background: https://wikipedia.org/wiki/Type-length-value

What it does

Converts a Type-Length-Value (TLV) encoded string into a JSON object. Can optionally include a Key / Type entry. Tags: Key-Length-Value, KLV, Length-Value, LV

Note

Status here means the operation name is implemented and callable. It does not by itself promise byte-for-byte parity for every upstream option. See Compatibility and current status for the verified scope and known boundaries.

Arguments and options

Arguments are positional. Keep their order when using bake() or Pipeline.then().

Index	Name	UI type	PyChef default	Accepted values / format
`0`	Type/Key size	`number`	`0`	A Python integer or floating-point value
`1`	Length size	`number`	`1`	A Python integer or floating-point value
`2`	Use BER	`boolean`	`False`	`True` or `False`

Recipe template

Important

This is a call template built from the documented defaults. Replace placeholder values such as empty keys, paths, patterns, or lookup data before running it.

from pychef import bake

input_value = b"example"
args = [0, 1, False]
result = bake(input_value, [{"op": 'Parse TLV', "args": args}])
print(result)

Pipeline example

from pychef import Pipeline

args = [0, 1, False]
transform = Pipeline().then('Parse TLV', *args)
result = transform(b"example")

Dedicated operation module

The registered entry point lives in pychef.operations.by_operation.parse_tlv. Direct calls receive the input value and a positional argument tuple:

from pychef.operations.by_operation.parse_tlv import run

result = run(b"example", tuple([0, 1, False]))

pychef.operations.by_operation.parse_tlv.run(value, args)

Run this operation using its shared internal implementation.

Parameters:

value (str | bytes)
args (Sequence[Any])

Return type:

str | bytes