Restricted Python Virtual Machine

Restricted Python Virtual Machine (R-PVM) implemented by pure python.

specification

• aim for complete safe sandbox
• designed for Python3.6 bytecode
• execute one by one
• good for smart contract of crypto currency
• No warranty and unstable

check

• cannot use MAKE_FUNCTION op (lambda, comprehension and inner fnc)
• cannot use async/await
• limit to execute function
• YOU must select safe function

Install

pip3 install rpvm

How to use

from rpvm.vm import VirtualMachine
from RestrictedPython import safe_builtins, safe_globals
 
source = """
a = 1
b = 2
c = a + b
"""
code = compile(source, '<example>', 'exec')
 
b = safe_builtins.copy()
l = dict()
g = safe_globals.copy()
vm = VirtualMachine(code, b, l, g)
 
steps = 0
max_steps = 500
while not vm.finish and steps < max_steps:
    vm.exec()
    steps += 1
print("complete?", vm.finish)
print("result", vm.return_value)
print("c is", l['c'])

test

python3 -m pytest tests

Author

@namuyan_mine