70 lines
1.8 KiB
Python
70 lines
1.8 KiB
Python
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'''
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Extract detection feature for each app according to included Android API
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input: smali files of an app stored under /app_name/
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output: detection features for the app stored in app_name.feature
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'''
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import os
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import sys
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import string
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import pickle as pkl
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import argparse
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import glob
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import operator
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def extract_feature(filedir):
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feature = []
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for dirpath, dirnames, filenames in os.walk(filedir):
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for filename in [f for f in filenames if f.endswith ('.smali')]:
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fn = os.path.join(dirpath, filename) # each smali file
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lines = open(fn,'r').readlines()
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lines = [line.strip() for line in lines]
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for line in lines:
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# get all class names in invoke
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try:
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start = line.index(', ') + len(', ')
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end = line.index(';', start)
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classes = line[start:end]
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except ValueError:
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classes = ''
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# get invoking method name
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try:
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start = line.index(';->') + len(';->')
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end = line.index('(', start)
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methods = line[start:end]
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except ValueError:
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methods = ''
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objects = classes.split('/')
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a = len(objects)
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current_class = classes[:-(len(objects[a-1])+1)]
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if current_class in packages: # android api
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fe = classes + ':' + methods
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feature.append(fe)
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with open(filedir + '.feature', 'wb') as result:
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pkl.dump(feature, result)
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def main():
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family = ['android','google','java','javax', 'xml','apache', 'junit','json', 'dom']
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# correspond to the android.*, com.google.*, java.*, javax.*, org.xml.*, org.apache.*, junit.*, org.json, and org.w3c.dom.* packages
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global packages
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packages = open('android_package.name','r').readlines()
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packages = [package.strip() for package in packages] # packages correspond to family
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print 'official package number:', len(packages)
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names = ['--list of app names ----']
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for app_name in names:
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extract_feature(app_name)
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if __name__ == "__main__":
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main()
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