From 0e73aadf4e787df9e376108eb82e297626045b11 Mon Sep 17 00:00:00 2001
From: Rusty Wagner <rusty@vector35.com>
Date: Wed, 13 Mar 2019 11:26:05 -0400
Subject: Initial example triage UI plugin

---
 python/examples/triage/entropy.py | 91 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 python/examples/triage/entropy.py

(limited to 'python/examples/triage/entropy.py')

diff --git a/python/examples/triage/entropy.py b/python/examples/triage/entropy.py
new file mode 100644
index 00000000..03249968
--- /dev/null
+++ b/python/examples/triage/entropy.py
@@ -0,0 +1,91 @@
+import math
+import threading
+from PySide2.QtWidgets import QWidget
+from PySide2.QtGui import QImage, QColor, QPainter
+from PySide2.QtCore import Qt, QSize, QTimer
+from binaryninjaui import ViewFrame
+
+
+class EntropyThread(threading.Thread):
+	def __init__(self, data, image, block_size):
+		super(EntropyThread, self).__init__()
+		self.data = data
+		self.image = image
+		self.block_size = block_size
+		self.updated = False
+
+	def run(self):
+		width = self.image.width()
+		for i in range(0, width):
+			block = self.data.read(self.data.start + i * self.block_size, self.block_size)
+			if len(block) == 0:
+				v = 0
+			else:
+				dist = [0] * 0x100
+				for j in range(0, len(block)):
+					value = ord(block[j:j+1])
+					dist[value] += 1
+				s = 0
+				for j in range(0, 256):
+					if dist[j] != 0:
+						s += (float(dist[j]) / len(block)) * math.log(float(dist[j]) / len(block))
+				s = s / math.log(1 / 256.0)
+				v = int(s * 255)
+			if v >= 240:
+				self.image.setPixelColor(i, 0, QColor(v, v, v / 4, 255))
+			else:
+				self.image.setPixelColor(i, 0, QColor(v / 4, v / 4, v, 255))
+			self.updated = True
+
+
+class EntropyWidget(QWidget):
+	def __init__(self, parent, data):
+		super(EntropyWidget, self).__init__(parent)
+		self.data = data
+		self.raw_data = data.file.raw
+
+		self.block_size = 1024
+		self.width = int(len(self.raw_data) / self.block_size)
+		self.image = QImage(self.width, 1, QImage.Format_ARGB32)
+		self.image.fill(QColor(0, 0, 0, 0))
+
+		self.thread = EntropyThread(self.raw_data, self.image, self.block_size)
+		self.started = False
+
+		self.timer = QTimer()
+		self.timer.timeout.connect(self.timerEvent)
+		self.timer.setInterval(250)
+		self.timer.setSingleShot(False)
+		self.timer.start()
+
+		self.setMinimumHeight(32)
+
+	def paintEvent(self, event):
+		p = QPainter(self)
+		p.drawImage(self.rect(), self.image)
+		p.drawRect(self.rect())
+
+	def sizeHint(self):
+		return QSize(640, 32)
+
+	def timerEvent(self):
+		if not self.started:
+			self.thread.start()
+			self.started = True
+		if self.thread.updated:
+			self.thread.updated = False
+			self.update()
+
+	def mousePressEvent(self, event):
+		if event.button() != Qt.LeftButton:
+			return
+		frac = float(event.x()) / self.rect().width()
+		offset = int(frac * self.width * self.block_size)
+		addr = self.data.get_address_for_data_offset(offset)
+		view_frame = ViewFrame.viewFrameForWidget(self)
+		if view_frame is None:
+			return
+		if addr is None:
+			view_frame.navigate("Hex:Raw", offset)
+		else:
+			view_frame.navigate("Linear:" + view_frame.getCurrentDataType(), addr)
-- 
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