From Base64

Category: Encoding

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

Input / output: string → byteArray

Background: https://wikipedia.org/wiki/Base64

What it does

Base64 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers. This operation decodes data from an ASCII Base64 string back into its raw format. e.g. aGVsbG8= becomes hello

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`	Alphabet	`editableOption`	`'A-Za-z0-9+/='`	`'A-Za-z0-9+/='`, `'A-Za-z0-9-_'`, `'A-Za-z0-9+\\-='`, `'./0-9A-Za-z='`, `'A-Za-z0-9_.'`, `'A-Za-z0-9._-'`, `'0-9a-zA-Z+/='`, `'0-9A-Za-z+/='`, `' -_'`, `'+\\-0-9A-Za-z'`, '!-,-0-689@A-NP-VX-Z[`a-fh-mp-r', `'N-ZA-Mn-za-m0-9+/='`, `'./0-9A-Za-z'`, `'/128GhIoPQROSTeUbADfgHijKLM+n0pFWXY456xyzB7=39VaqrstJklmNuZvwcdEC'`, `'3GHIJKLMNOPQRSTUb=cdefghijklmnopWXYZ/12+406789VaqrstuvwxyzABCDEF5'`, `'ZKj9n+yf0wDVX1s/5YbdxSo=ILaUpPBCHg8uvNO4klm6iJGhQ7eFrWczAMEq3RTt2'`, `'HNO4klm6ij9n+J2hyf0gzA8uvwDEq3X1Q7ZKeFrWcVTts/MRGYbdxSo=ILaUpPBC5'`
`1`	Remove non-alphabet chars	`boolean`	`True`	`True` or `False`
`2`	Strict mode	`boolean`	`False`	`True` or `False`

Working recipe example

from pychef import bake

input_value = "SGVsbG8="
args = ['A-Za-z0-9+/=', True, False]
result = bake(input_value, [{"op": 'From Base64', "args": args}])
print(result)

Expected representation: b'Hello'.

Pipeline example

from pychef import Pipeline

args = ['A-Za-z0-9+/=', True, False]
transform = Pipeline().then('From Base64', *args)
result = transform("SGVsbG8=")

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 = ['A-Za-z0-9+/=', True, False]
result = run_operation('From Base64', "SGVsbG8=", 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.from_base64. Direct calls receive the input value and a positional argument tuple:

from pychef.operations.by_operation.from_base64 import run

result = run("SGVsbG8=", tuple(['A-Za-z0-9+/=', True, False]))

pychef.operations.by_operation.from_base64.run(value, args)

Run this operation using its shared internal implementation.

Parameters:

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

Return type:

str | bytes