pyt/pyt/draw.py at github-search-menu · python-security/pyt · GitHub

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"""Draws CFG."""

from graphviz import Digraph

from base_cfg import AssignmentNode

from itertools import permutations

from subprocess import run

import argparse

IGNORED_LABEL_NAME_CHARACHTERS = ':'

cfg_styles = {

'graph': {

'fontsize': '16',

'fontcolor': 'black',

'bgcolor': 'transparent',

'rankdir': 'TB',

'splines': 'ortho',

'margin' : '0.01',

'nodes': {

'fontname': 'Gotham',

'shape': 'box',

'fontcolor': 'black',

'color': 'black',

'style': 'filled',

'fillcolor': 'transparent',

'edges': {

'style': 'filled',

'color': 'black',

'arrowhead': 'normal',

'fontname': 'Courier',

'fontsize': '12',

'fontcolor': 'black',

}

lattice_styles = {

'graph': {

'fontsize': '16',

'fontcolor': 'black',

'bgcolor': 'transparent',

'rankdir': 'TB',

'splines': 'line',

'margin' : '0.01',

'ranksep': '1',

'nodes': {

'fontname': 'Gotham',

'shape': 'none',

'fontcolor': 'black',

'color': 'black',

'style': 'filled',

'fillcolor': 'transparent',

'edges': {

'style': 'filled',

'color': 'black',

'arrowhead': 'none',

'fontname': 'Courier',

'fontsize': '12',

'fontcolor': 'black',

}

def apply_styles(graph, styles):

"""Apply styles to graph."""

graph.graph_attr.update(

('graph' in styles and styles['graph']) or {}

)

graph.node_attr.update(

('nodes' in styles and styles['nodes']) or {}

)

graph.edge_attr.update(

('edges' in styles and styles['edges']) or {}

)

return graph

def draw_cfg(cfg, output_filename = 'output'):

"""Draw CFG and output as pdf."""

graph = Digraph(format='pdf')

for node in cfg.nodes:

stripped_label = node.label.replace(IGNORED_LABEL_NAME_CHARACHTERS, '')

if 'Exit' in stripped_label:

graph.node(stripped_label, 'Exit', shape='none')

elif 'Entry' in stripped_label:

graph.node(stripped_label, 'Entry', shape='none')

else:

graph.node(stripped_label, stripped_label)

for ingoing_node in node.ingoing:

graph.edge(ingoing_node.label.replace(IGNORED_LABEL_NAME_CHARACHTERS, ''), stripped_label)

graph = apply_styles(graph, cfg_styles)

graph.render(filename = output_filename)

class Node():

def __init__(self, s, parent, children=None):

self.s = s

self.parent = parent

self.children = children

def __str__(self):

return 'Node: ' + str(self.s) + ' Parent: ' + str(self.parent) + ' Children: ' + str(self.children)

def __hash__(self):

return hash(str(self.s))

def draw_node(l, graph, node):

node_label = str(node.s)

graph.node(node_label, node_label)

for child in node.children:

child_label = str(child.s)

graph.node(child_label, child_label)

if not (node_label, child_label) in l:

graph.edge(node_label, child_label, )

l.append((node_label, child_label))

draw_node(l, graph, child)

def make_lattice(s, length):

p = Node(s, None)

p.children = get_children(p, s, length)

return p

def get_children(p, s, length):

children = set()

if length < 0:

return children

for subset in permutations(s, length):

setsubset = set(subset)

append = True

for node in children:

if setsubset == node.s:

append = False

break

if append:

n = Node(setsubset, p)

n.children = get_children(n, setsubset, length-1)

children.add(n)

return children

def add_anchor(filename):

filename += '.dot'

out = list()

delimiter = '->'

with open(filename, 'r') as fd:

for line in fd:

if delimiter in line:

s = line.split(delimiter)

ss = s[0][:-1]

s[0] = ss + ':s '

ss = s[1][:-1]

s[1] = ss + ':n\n'

s.insert(1, delimiter)

out.append(''.join(s))

elif 'set()' in line:

out.append('"set()" [label="{}"]')

else:

out.append(line)

with open(filename, 'w') as fd:

for line in out:

fd.write(line)

def run_dot(filename):

filename += '.dot'

run(['dot', '-Tpdf', filename, '-o', filename.replace('.dot', '.pdf')])

def draw_lattice(cfg, output_filename='output'):

"""Draw CFG and output as pdf."""

graph = Digraph(format='pdf')

ll = [s.label for s in cfg.nodes if isinstance(s, AssignmentNode)]

root = make_lattice(ll,len(ll)-1)

l = list()

draw_node(l, graph, root)

graph = apply_styles(graph, lattice_styles)

graph.render(filename = output_filename+'.dot')

add_anchor(output_filename)

run_dot(output_filename)

def draw_lattice_from_labels(labels, output_filename):

graph = Digraph(format='pdf')

root = make_lattice(labels, len(labels)-1)

l = list()

draw_node(l, graph, root)

graph = apply_styles(graph, lattice_styles)

graph.render(filename = output_filename+'.dot')

add_anchor(output_filename)

run_dot(output_filename)

def draw_lattices(cfg_list, output_prefix='output'):

for i, cfg in enumerate(cfg_list):

draw_lattice(cfg, output_prefix + '_' + str(i))

def draw_cfgs(cfg_list, output_prefix='output'):

for i, cfg in enumerate(cfg_list):

draw_cfg(cfg, output_prefix + '_' + str(i))

parser = argparse.ArgumentParser()

parser.add_argument('-l', '--labels', nargs='+', help='Set of labels in lattice.')

parser.add_argument('-n', '--name', help='Specify filename.', type=str)

if __name__ == '__main__':

args = parser.parse_args()

draw_lattice_from_labels(args.labels, args.name)

pyt/pyt/draw.py at github-search-menu · python-security/pyt · GitHub

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