example transform API plugin for Binary Ninja

transform.py

from binaryninja import Transform
from binaryninja.enums import TransformType

class HASHA(Transform):
    name = 'HASHA'
    long_name = 'ALWAYS RETURN A'
    transform_type = TransformType.HashTransform

    def perform_decode(self, data, params):
        return b"AAAAA"

    def perform_encode(self, data, params):
        return b"AAAAA"

class XORB(Transform):
    name = 'XORB'
    long_name = 'XOR Buffer with B'
    transform_type = TransformType.InvertingTransform
    group = "XOR"

    @staticmethod
    def xorkey(data, key):
        output = []
        for byte in data:
            output.append(byte ^ key)
        return bytes(output)

    def perform_encode(self, data, params):
        return self.xorkey(data, 0x42)

class XORA(Transform):
    name = 'XORA'
    long_name = 'XOR Buffer with A'
    transform_type = TransformType.InvertingTransform
    group = "XOR"

    @staticmethod
    def xorkey(data, key):
        output = []
        for byte in data:
            output.append(byte ^ key)
        return bytes(output)

    def perform_encode(self, data, params):
        return self.xorkey(data, 0x41)

XORA.register()
XORB.register()
HASHA.register()