ROT13 Brute Force

Category: Ciphers

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

Input / output: byteArray → string

Background: https://wikipedia.org/wiki/ROT13

What it does

Try all meaningful amounts for ROT13. Optionally you can enter your known plaintext (crib) to filter the result.

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`	Rotate lower case chars	`boolean`	`True`	`True` or `False`
`1`	Rotate upper case chars	`boolean`	`True`	`True` or `False`
`2`	Rotate numbers	`boolean`	`False`	`True` or `False`
`3`	Sample length	`number`	`100`	A Python integer or floating-point value
`4`	Sample offset	`number`	`0`	A Python integer or floating-point value
`5`	Print amount	`boolean`	`True`	`True` or `False`
`6`	Crib (known plaintext string)	`string`	`''`	`''`

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 = [True, True, False, 100, 0, True, '']
result = bake(input_value, [{"op": 'ROT13 Brute Force', "args": args}])
print(result)

Pipeline example

from pychef import Pipeline

args = [True, True, False, 100, 0, True, '']
transform = Pipeline().then('ROT13 Brute Force', *args)
result = transform(b"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 = [True, True, False, 100, 0, True, '']
result = run_operation('ROT13 Brute Force', b"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.rot13_brute_force. Direct calls receive the input value and a positional argument tuple:

from pychef.operations.by_operation.rot13_brute_force import run

result = run(b"example", tuple([True, True, False, 100, 0, True, '']))

pychef.operations.by_operation.rot13_brute_force.run(value, args)

Run this operation using its shared internal implementation.

Parameters:

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

Return type:

str | bytes