GOST Key Unwrap

Category: Ciphers

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

Input / output: string → string

Background: https://wikipedia.org/wiki/GOST_(block_cipher)

What it does

A decryptor for keys wrapped using one of the GOST block ciphers.

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`	Key	`toggleString`	`{'string': '', 'option': 'Hex'}`	`''`
`1`	User Key Material	`toggleString`	`{'string': '', 'option': 'Hex'}`	`''`
`2`	Input type	`option`	`'Hex'`	`'Hex'`, `'Raw'`
`3`	Output type	`option`	`'Raw'`	`'Raw'`, `'Hex'`
`4`	Algorithm	`argSelector`	`'GOST 28147 (1989)'`	`'GOST 28147 (1989)'`, `'GOST R 34.12 (Magma, 2015)'`, `'GOST R 34.12 (Kuznyechik, 2015)'`
`5`	sBox	`option`	`'E-A'`	`'E-TEST'`, `'E-A'`, `'E-B'`, `'E-C'`, `'E-D'`, `'E-SC'`, `'E-Z'`, `'D-TEST'`, `'D-A'`, `'D-SC'`
`6`	Key wrapping	`option`	`'NO'`	`'NO'`, `'CP'`, `'SC'`

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 = "example"
args = [{'string': '', 'option': 'Hex'}, {'string': '', 'option': 'Hex'}, 'Hex', 'Raw', 'GOST 28147 (1989)', 'E-A', 'NO']
result = bake(input_value, [{"op": 'GOST Key Unwrap', "args": args}])
print(result)

Pipeline example

from pychef import Pipeline

args = [{'string': '', 'option': 'Hex'}, {'string': '', 'option': 'Hex'}, 'Hex', 'Raw', 'GOST 28147 (1989)', 'E-A', 'NO']
transform = Pipeline().then('GOST Key Unwrap', *args)
result = transform("example")

Direct call

pychef.ops.run_operation runs any registered operation as a plain function, under the active ExecutionPolicy (safe defaults, no network):

from pychef.ops import run_operation

args = [{'string': '', 'option': 'Hex'}, {'string': '', 'option': 'Hex'}, 'Hex', 'Raw', 'GOST 28147 (1989)', 'E-A', 'NO']
result = run_operation('GOST Key Unwrap', "example", args=args)

Common operations also have typed helpers in Direct operations.

Low-level operation module

Warning

The module below is an internal implementation detail. It applies no execution policy, resource limits, or error sanitization; prefer bake(), Pipeline, or pychef.ops for application code.

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

from pychef.operations.by_operation.gost_key_unwrap import run

result = run("example", tuple([{'string': '', 'option': 'Hex'}, {'string': '', 'option': 'Hex'}, 'Hex', 'Raw', 'GOST 28147 (1989)', 'E-A', 'NO']))

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

Run this operation using its shared internal implementation.

Parameters:

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

Return type:

str | bytes