class AndroguardAnalysis(object):
def __init__(self, app_path):
self.app_path = app_path
from androguard.core.bytecodes.apk import APK
self.a = APK(app_path)
self.d = None
self.dx = None
def get_detailed_analysis(self):
from androguard.misc import AnalyzeDex
self.d, self.dx = AnalyzeDex(self.a.get_dex(), raw=True)
def get_developer_name(self):
developer = "Unknown"
if (self.a.is_signed()):
try:
signatures = self.a.get_signature_names()
for signature in signatures:
cert = self.a.get_certificate(signature)
issuer = get_certificate_name_string(cert.issuer)
attr_list = issuer.split(',')
for attr in attr_list:
if attr.startswith(
" organizationName") or attr.startswith(
"organizationName"):
developer = attr.split('=')[1]
except ValueError:
print("certificat endommagée ... ")
return developer
def testAPKCertFingerprint(self):
"""
Test if certificates are correctly unpacked from the SignatureBlock files
Check if fingerprints matches
:return:
"""
from androguard.core.bytecodes.apk import APK
import binascii
from hashlib import md5, sha1, sha256
a = APK("examples/android/TestsAndroguard/bin/TestActivity.apk", skip_analysis=True)
# this one is not signed v2, it is v1 only
self.assertTrue(a.is_signed_v1())
self.assertFalse(a.is_signed_v2())
self.assertTrue(a.is_signed())
self.assertEqual(a.get_certificates_der_v2(), [])
self.assertEqual(a.get_certificates_v2(), [])
self.assertEqual(a.get_signature_name(), "META-INF/CERT.RSA")
self.assertEqual(a.get_signature_names(), ["META-INF/CERT.RSA"])
cert = a.get_certificate(a.get_signature_name())
cert_der = a.get_certificate_der(a.get_signature_name())
# Keytool are the hashes collected by keytool -printcert -file CERT.RSA
for h2, keytool in [(md5, "99:FF:FC:37:D3:64:87:DD:BA:AB:F1:7F:94:59:89:B5"),
(sha1, "1E:0B:E4:01:F9:34:60:E0:8D:89:A3:EF:6E:27:25:55:6B:E1:D1:6B"),
(sha256, "6F:5C:31:60:8F:1F:9E:28:5E:B6:34:3C:7C:8A:F0:7D:E8:1C:1F:B2:14:8B:53:49:BE:C9:06:44:41:44:57:6D")]:
x = h2()
x.update(cert_der)
hash_hashlib = x.hexdigest()
self.assertEqual(hash_hashlib.lower(), keytool.replace(":", "").lower())
def testAPKCertFingerprint(self):
"""
Test if certificates are correctly unpacked from the SignatureBlock files
Check if fingerprints matches
:return:
"""
from androguard.core.bytecodes.apk import APK
import binascii
from cryptography.hazmat.primitives import hashes
from hashlib import md5, sha1, sha256
a = APK("examples/android/TestsAndroguard/bin/TestActivity.apk", skip_analysis=True)
cert = a.get_certificate(a.get_signature_name())
cert_der = a.get_certificate_der(a.get_signature_name())
# Keytool are the hashes collected by keytool -printcert -file CERT.RSA
for h, h2, keytool in [(hashes.MD5, md5, "99:FF:FC:37:D3:64:87:DD:BA:AB:F1:7F:94:59:89:B5"),
(hashes.SHA1, sha1, "1E:0B:E4:01:F9:34:60:E0:8D:89:A3:EF:6E:27:25:55:6B:E1:D1:6B"),
(hashes.SHA256, sha256, "6F:5C:31:60:8F:1F:9E:28:5E:B6:34:3C:7C:8A:F0:7D:E8:1C:1F:B2:14:8B:53:49:BE:C9:06:44:41:44:57:6D")]:
hash_x509 = binascii.hexlify(cert.fingerprint(h())).decode("ascii")
x = h2()
x.update(cert_der)
hash_hashlib = x.hexdigest()
self.assertEqual(hash_x509.lower(), hash_hashlib.lower())
self.assertEqual(hash_x509.lower(), keytool.replace(":", "").lower())
def testAPKCertFingerprint(self):
"""
Test if certificates are correctly unpacked from the SignatureBlock files
Check if fingerprints matches
:return:
"""
from androguard.core.bytecodes.apk import APK
import binascii
from hashlib import md5, sha1, sha256
a = APK("examples/android/TestsAndroguard/bin/TestActivity.apk", skip_analysis=True)
# this one is not signed v2, it is v1 only
self.assertTrue(a.is_signed_v1())
self.assertFalse(a.is_signed_v2())
self.assertTrue(a.is_signed())
self.assertEqual(a.get_certificates_der_v2(), [])
self.assertEqual(a.get_certificates_v2(), [])
self.assertEqual(a.get_signature_name(), "META-INF/CERT.RSA")
self.assertEqual(a.get_signature_names(), ["META-INF/CERT.RSA"])
cert = a.get_certificate(a.get_signature_name())
cert_der = a.get_certificate_der(a.get_signature_name())
# Keytool are the hashes collected by keytool -printcert -file CERT.RSA
for h2, keytool in [(md5, "99:FF:FC:37:D3:64:87:DD:BA:AB:F1:7F:94:59:89:B5"),
(sha1, "1E:0B:E4:01:F9:34:60:E0:8D:89:A3:EF:6E:27:25:55:6B:E1:D1:6B"),
(sha256, "6F:5C:31:60:8F:1F:9E:28:5E:B6:34:3C:7C:8A:F0:7D:E8:1C:1F:B2:14:8B:53:49:BE:C9:06:44:41:44:57:6D")]:
x = h2()
x.update(cert_der)
hash_hashlib = x.hexdigest()
self.assertEqual(hash_hashlib.lower(), keytool.replace(":", "").lower())
def testAPKCertFingerprint(self):
"""
Test if certificates are correctly unpacked from the SignatureBlock files
Check if fingerprints matches
:return:
"""
from androguard.core.bytecodes.apk import APK
import binascii
from cryptography.hazmat.primitives import hashes
from hashlib import md5, sha1, sha256
a = APK("examples/android/TestsAndroguard/bin/TestActivity.apk",
skip_analysis=True)
cert = a.get_certificate(a.get_signature_name())
cert_der = a.get_certificate_der(a.get_signature_name())
# Keytool are the hashes collected by keytool -printcert -file CERT.RSA
for h, h2, keytool in [
(hashes.MD5, md5,
"99:FF:FC:37:D3:64:87:DD:BA:AB:F1:7F:94:59:89:B5"),
(hashes.SHA1, sha1,
"1E:0B:E4:01:F9:34:60:E0:8D:89:A3:EF:6E:27:25:55:6B:E1:D1:6B"),
(hashes.SHA256, sha256,
"6F:5C:31:60:8F:1F:9E:28:5E:B6:34:3C:7C:8A:F0:7D:E8:1C:1F:B2:14:8B:53:49:BE:C9:06:44:41:44:57:6D"
)
]:
hash_x509 = binascii.hexlify(cert.fingerprint(h())).decode("ascii")
x = h2()
x.update(cert_der)
hash_hashlib = x.hexdigest()
self.assertEqual(hash_x509.lower(), hash_hashlib.lower())
self.assertEqual(hash_x509.lower(),
keytool.replace(":", "").lower())
def testApksignAPKs(self):
# These APKs are from the apksign testcases and cover
# all different signature algorithms as well as some error cases
from androguard.core.bytecodes.apk import APK
import zipfile
from asn1crypto import x509, pem
import binascii
root = "examples/signing/apksig"
# Correct values generated with openssl:
# In the apksig repo:src/test/resources/com/android/apksig
# for f in *.pem; do openssl x509 -in $f -noout -sha256 -fingerprint; done
certfp = {
'dsa-1024.x509.pem': 'fee7c19ff9bfb4197b3727b9fd92d95406b1bd96db99ea642f5faac019a389d7',
'dsa-2048.x509.pem': '97cce0bab292c2d5afb9de90e1810b41a5d25c006a10d10982896aa12ab35a9e',
'dsa-3072.x509.pem': '966a4537058d24098ea213f12d4b24e37ff5a1d8f68deb8a753374881f23e474',
'ec-p256.x509.pem': '6a8b96e278e58f62cfe3584022cec1d0527fcb85a9e5d2e1694eb0405be5b599',
'ec-p384.x509.pem': '5e7777ada7ee7ce8f9c4d1b07094876e5604617b7988b4c5d5b764a23431afbe',
'ec-p521.x509.pem': '69b50381d98bebcd27df6d7df8af8c8b38d0e51e9168a95ab992d1a9da6082da',
'rsa-1024_2.x509.pem': 'eba3685e799f59804684abebf0363e14ccb1c213e2b954a22669714ed97f61e9',
'rsa-1024.x509.pem': 'bc5e64eab1c4b5137c0fbc5ed05850b3a148d1c41775cffa4d96eea90bdd0eb8',
'rsa-16384.x509.pem': 'f3c6b37909f6df310652fbd7c55ec27d3079dcf695dc6e75e22ba7c4e1c95601',
'rsa-2048_2.x509.pem': '681b0e56a796350c08647352a4db800cc44b2adc8f4c72fa350bd05d4d50264d',
'rsa-2048_3.x509.pem': 'bb77a72efc60e66501ab75953af735874f82cfe52a70d035186a01b3482180f3',
'rsa-2048.x509.pem': 'fb5dbd3c669af9fc236c6991e6387b7f11ff0590997f22d0f5c74ff40e04fca8',
'rsa-3072.x509.pem': '483934461229a780010bc07cd6eeb0b67025fc4fe255757abbf5c3f2ed249e89',
'rsa-4096.x509.pem': '6a46158f87753395a807edcc7640ac99c9125f6b6e025bdbf461ff281e64e685',
'rsa-8192.x509.pem': '060d0a24fea9b60d857225873f78838e081795f7ef2d1ea401262bbd75a58234',
}
will_not_validate_correctly = [
"targetSandboxVersion-2.apk",
"targetSandboxVersion-2.apk",
"v1-only-with-cr-in-entry-name.apk",
"v1-only-with-lf-in-entry-name.apk",
"v1-only-with-nul-in-entry-name.apk",
"v1-only-with-rsa-1024-cert-not-der2.apk",
"v2-only-cert-and-public-key-mismatch.apk",
"v2-only-with-dsa-sha256-1024-sig-does-not-verify.apk",
"debuggable-boolean.apk",
"debuggable-resource.apk",
]
# Collect possible hashes for certificates
# Unfortunately, not all certificates are supplied...
for apath in os.listdir(root):
if apath in certfp:
with open(os.path.join(root, apath), "rb") as fp:
cert = x509.Certificate.load(pem.unarmor(fp.read())[2])
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertEqual(h, certfp[apath])
self.assertIn(h, certfp.values())
for apath in os.listdir(root):
if apath.endswith(".apk"):
if apath == "v2-only-garbage-between-cd-and-eocd.apk" or \
apath == "v2-only-truncated-cd.apk" or \
apath == "v1v2v3-with-rsa-2048-lineage-3-signers-invalid-zip.apk":
# Can not load as APK
with self.assertRaises(zipfile.BadZipFile):
APK(os.path.join(root, apath))
continue
elif apath in will_not_validate_correctly:
# These APKs are faulty (by design) and will return a not correct fingerprint.
# TODO: we need to check if we can prevent such errors...
continue
a = APK(os.path.join(root, apath))
self.assertIsInstance(a, APK)
# Test if the correct method returns True, while others return
# False
m_tests = {'1': a.is_signed_v1,
'2': a.is_signed_v2,
'3': a.is_signed_v3}
# These APKs will raise an error
excluded = [
"v1v2v3-with-rsa-2048-lineage-3-signers-no-sig-block.apk",
"v2-only-apk-sig-block-size-mismatch.apk",
"v2-only-empty.apk",
"v2-only-wrong-apk-sig-block-magic.apk",
"v2-stripped.apk",
"v2-stripped-with-ignorable-signing-schemes.apk",
"v2v3-signed-v3-block-stripped.apk",
"v3-only-empty.apk",
"v3-only-with-ecdsa-sha512-p384-wrong-apk-sig-block-magic.apk",
"v3-only-with-rsa-pkcs1-sha512-4096-apk-sig-block-size-mismatch.apk",
"v3-stripped.apk",
]
if apath[0] == "v" and apath not in excluded:
methods = apath.split("-", 1)[0].split("v")[1:]
for m, f in m_tests.items():
if m in methods:
self.assertTrue(f())
else:
self.assertFalse(f())
# Special error cases
if apath == "v2-only-apk-sig-block-size-mismatch.apk":
with self.assertRaises(apk.BrokenAPKError):
a.is_signed_v2()
continue
elif apath == "v2-only-empty.apk":
with self.assertRaises(apk.BrokenAPKError):
a.is_signed_v2()
continue
elif apath == "v3-only-with-rsa-pkcs1-sha512-4096-apk-sig-block-size-mismatch.apk":
with self.assertRaises(apk.BrokenAPKError):
a.is_signed_v3()
continue
if a.is_signed_v1():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
for c in a.get_signature_names():
a.get_certificate(c)
elif apath == "v1-only-with-rsa-1024-cert-not-der.apk":
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ","").lower()
self.assertNotIn(h, certfp.values())
# print([apath, h]) # I do not know, why put this file?
der = a.get_certificate_der(sig)
apk.show_Certificate(c, True)
apk.show_Certificate(c, False)
self.assertEqual(hashlib.sha256(der).hexdigest(), h)
pass
else:
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
der = a.get_certificate_der(sig)
self.assertEqual(hashlib.sha256(der).hexdigest(), h)
if a.is_signed_v2():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
a.get_certificates_der_v2()
elif apath == "v2-only-with-rsa-pkcs1-sha256-1024-cert-not-der.apk":
# FIXME
# Not sure what this one should do... but the certificate fingerprint is weird
# as the hash over the DER is not the same when using the certificate
continue
else:
for c in a.get_certificates_der_v2():
cert = x509.Certificate.load(c)
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
self.assertEqual(hashlib.sha256(c).hexdigest(), h)
if a.is_signed_v3():
print(apath)
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
a.get_certificates_der_v3()
elif apath == "v3-only-with-rsa-pkcs1-sha256-3072-sig-does-not-verify.apk" or \
apath == "v3-only-cert-and-public-key-mismatch.apk":
cert = x509.Certificate.load(a.get_certificates_der_v3()[0])
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertNotIn(h, certfp.values())
else:
for c in a.get_certificates_der_v3():
cert = x509.Certificate.load(c)
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
self.assertEqual(hashlib.sha256(c).hexdigest(), h)
def testApksignAPKs(self):
# These APKs are from the apksign testcases and cover
# all different signature algorithms as well as some error cases
from androguard.core.bytecodes.apk import APK
import zipfile
from asn1crypto import x509, pem
import binascii
root = "examples/signing/apksig"
# Correct values generated with openssl:
certfp = {
"dsa-1024.x509.pem":
"fee7c19ff9bfb4197b3727b9fd92d95406b1bd96db99ea642f5faac019a389d7",
"dsa-2048.x509.pem":
"97cce0bab292c2d5afb9de90e1810b41a5d25c006a10d10982896aa12ab35a9e",
"dsa-3072.x509.pem":
"966a4537058d24098ea213f12d4b24e37ff5a1d8f68deb8a753374881f23e474",
"ec-p256.x509.pem":
"6a8b96e278e58f62cfe3584022cec1d0527fcb85a9e5d2e1694eb0405be5b599",
"ec-p384.x509.pem":
"5e7777ada7ee7ce8f9c4d1b07094876e5604617b7988b4c5d5b764a23431afbe",
"ec-p521.x509.pem":
"69b50381d98bebcd27df6d7df8af8c8b38d0e51e9168a95ab992d1a9da6082da",
"rsa-1024.x509.pem":
"bc5e64eab1c4b5137c0fbc5ed05850b3a148d1c41775cffa4d96eea90bdd0eb8",
"rsa-16384.x509.pem":
"f3c6b37909f6df310652fbd7c55ec27d3079dcf695dc6e75e22ba7c4e1c95601",
"rsa-2048.x509.pem":
"fb5dbd3c669af9fc236c6991e6387b7f11ff0590997f22d0f5c74ff40e04fca8",
"rsa-3072.x509.pem":
"483934461229a780010bc07cd6eeb0b67025fc4fe255757abbf5c3f2ed249e89",
"rsa-4096.x509.pem":
"6a46158f87753395a807edcc7640ac99c9125f6b6e025bdbf461ff281e64e685",
"rsa-8192.x509.pem":
"060d0a24fea9b60d857225873f78838e081795f7ef2d1ea401262bbd75a58234",
}
will_not_validate_correctly = [
"targetSandboxVersion-2.apk",
"targetSandboxVersion-2.apk",
"v1-only-with-cr-in-entry-name.apk",
"v1-only-with-lf-in-entry-name.apk",
"v1-only-with-nul-in-entry-name.apk",
"v1-only-with-rsa-1024-cert-not-der2.apk",
"v2-only-cert-and-public-key-mismatch.apk",
"v2-only-with-dsa-sha256-1024-sig-does-not-verify.apk",
]
# Collect possible hashes for certificates
# Unfortunately, not all certificates are supplied...
for apath in os.listdir(root):
if apath in certfp:
with open(os.path.join(root, apath), "rb") as fp:
cert = x509.Certificate.load(pem.unarmor(fp.read())[2])
h = cert.sha256_fingerprint.replace(" ", "").lower()
self.assertEqual(h, certfp[apath])
self.assertIn(h, certfp.values())
for apath in os.listdir(root):
if apath.endswith(".apk"):
if apath == "v2-only-garbage-between-cd-and-eocd.apk" or \
apath == "v2-only-truncated-cd.apk":
# Can not load as APK
if sys.version_info.major == 2:
# Different name in python2...
with self.assertRaises(zipfile.BadZipfile):
APK(os.path.join(root, apath))
else:
with self.assertRaises(zipfile.BadZipFile):
APK(os.path.join(root, apath))
continue
elif apath in will_not_validate_correctly:
# These APKs are faulty (by design) and will return a not correct fingerprint.
# TODO: we need to check if we can prevent such errors...
continue
a = APK(os.path.join(root, apath))
self.assertIsInstance(a, APK)
# Special error cases
if apath == "v2-only-apk-sig-block-size-mismatch.apk":
with self.assertRaises(AssertionError):
a.is_signed_v2()
continue
elif apath == "v2-only-empty.apk":
with self.assertRaises(AssertionError):
a.is_signed_v2()
continue
if a.is_signed_v1():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
for c in a.get_signature_names():
a.get_certificate(c)
elif apath == "v1-only-with-rsa-1024-cert-not-der.apk":
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ", "").lower()
self.assertNotIn(h, certfp.values())
# print([apath, h]) # I do not know, why put this file?
der = a.get_certificate_der(sig)
apk.show_Certificate(c, True)
apk.show_Certificate(c, False)
self.assertEqual(
hashlib.sha256(der).hexdigest(), h)
pass
else:
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ", "").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
der = a.get_certificate_der(sig)
self.assertEqual(
hashlib.sha256(der).hexdigest(), h)
if a.is_signed_v2():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
a.get_certificates_der_v2()
elif apath == "v2-only-with-rsa-pkcs1-sha256-1024-cert-not-der.apk":
# FIXME
# Not sure what this one should do... but the certificate fingerprint is weird
# as the hash over the DER is not the same when using the certificate
continue
else:
for c in a.get_certificates_der_v2():
cert = x509.Certificate.load(c)
h = cert.sha256_fingerprint.replace(" ",
"").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
self.assertEqual(hashlib.sha256(c).hexdigest(), h)
class StaticAnalysis:
def __init__(self, apk_path=None):
self.apk = None
self.apk_path = apk_path
self.signatures = None
self.compiled_tracker_signature = None
self.classes = None
self.app_details = None
if apk_path is not None:
self.load_apk()
def _compile_signatures(self):
"""
Compiles the regex associated to each signature, in order to speed up
the trackers detection.
:return: A compiled list of signatures.
"""
self.compiled_tracker_signature = []
try:
self.compiled_tracker_signature = [
re.compile(track.code_signature) for track in self.signatures
]
except TypeError:
print("self.signatures is not iterable")
def load_trackers_signatures(self):
"""
Load trackers signatures from the official Exodus database.
:return: a dictionary containing signatures.
"""
self.signatures = []
exodus_url = "https://reports.exodus-privacy.eu.org/api/trackers"
r = requests.get(exodus_url)
data = r.json()
for e in data['trackers']:
self.signatures.append(
namedtuple(
'tracker',
data['trackers'][e].keys())(*data['trackers'][e].values()))
self._compile_signatures()
logging.debug('{} trackers signatures loaded'.format(
len(self.signatures)))
def load_apk(self):
"""
Load the APK file.
"""
if self.apk is None:
self.apk = APK(self.apk_path)
def get_embedded_classes(self):
"""
Get the list of Java classes embedded into all DEX files.
:return: array of Java classes names as string
"""
if self.classes is not None:
return self.classes
class_regex = re.compile(r'classes.*\.dex')
with TemporaryDirectory() as tmp_dir:
with zipfile.ZipFile(self.apk_path, "r") as apk_zip:
class_infos = (info for info in apk_zip.infolist()
if class_regex.search(info.filename))
for info in class_infos:
apk_zip.extract(info, tmp_dir)
dexdump = which('dexdump')
cmd = '{} {}/classes*.dex | perl -n -e\'/[A-Z]+((?:\w+\/)+\w+)/ && print "$1\n"\'|sort|uniq'.format(
dexdump, tmp_dir)
try:
self.classes = subprocess.check_output(
cmd,
stderr=subprocess.STDOUT,
shell=True,
universal_newlines=True).splitlines()
logging.debug('{} classes found in {}'.format(
len(self.classes), self.apk_path))
return self.classes
except subprocess.CalledProcessError:
logging.error('Unable to decode {}'.format(self.apk_path))
raise Exception('Unable to decode the APK')
def detect_trackers_in_list(self, class_list):
"""
Detect embedded trackers in the provided classes list.
:return: list of embedded trackers
"""
if self.signatures is None:
self.load_trackers_signatures()
def _detect_tracker(sig, tracker, class_list):
for clazz in class_list:
if sig.search(clazz):
return tracker
return None
results = []
args = [(self.compiled_tracker_signature[index], tracker, class_list)
for (index, tracker) in enumerate(self.signatures)
if len(tracker.code_signature) > 3]
for res in itertools.starmap(_detect_tracker, args):
if res:
results.append(res)
trackers = [t for t in results if t is not None]
logging.debug('{} trackers detected in {}'.format(
len(trackers), self.apk_path))
return trackers
def detect_trackers(self, class_list_file=None):
"""
Detect embedded trackers.
:return: list of embedded trackers
"""
if self.signatures is None:
self.load_trackers_signatures()
if class_list_file is None:
return self.detect_trackers_in_list(self.get_embedded_classes())
else:
with open(class_list_file, 'r') as classes_file:
classes = classes_file.readlines()
return self.detect_trackers_in_list(classes)
def get_version(self):
"""
Get the application version name
:return: version name
"""
self.load_apk()
return self.apk.get_androidversion_name()
def get_version_code(self):
"""
Get the application version code
:return: version code
"""
self.load_apk()
return self.apk.get_androidversion_code()
def get_permissions(self):
"""
Get application permissions
:return: application permissions list
"""
self.load_apk()
return self.apk.get_permissions()
def get_app_name(self):
"""
Get application name
:return: application name
"""
self.load_apk()
return self.apk.get_app_name()
def get_package(self):
"""
Get application package
:return: application package
"""
self.load_apk()
return self.apk.get_package()
def get_libraries(self):
"""
Get application libraries
:return: application libraries list
"""
self.load_apk()
return self.apk.get_libraries()
def get_icon_path(self):
"""
Get the icon path in the ZIP archive
:return: icon path in the ZIP archive
"""
self.load_apk()
return self.apk.get_app_icon()
def get_application_details(self):
"""
Get the application details like creator, number of downloads, etc.
:param handle: application handle
:return: application details dictionary
"""
self.load_apk()
if self.app_details is not None:
return self.app_details
details = get_details_from_gplaycli(self.get_package())
if details is not None:
self.app_details = details
return details
def _get_icon_from_details(self, path):
"""
Get icon from applications details dictionary
:param path: path where to write the icon file
:return: icon path
:raises Exception: if unable to find icon
"""
details = self.get_application_details()
if details is not None:
for i in details.get('images'):
if i.get('imageType') == 4:
f = requests.get(i.get('url'))
with open(path, mode='wb') as fp:
fp.write(f.content)
if os.path.isfile(path) and os.path.getsize(path) > 0:
return path
raise Exception('Unable to download the icon from details')
@staticmethod
def _render_drawable_to_png(self, bxml, path):
ap = axml.AXMLPrinter(bxml)
print(ap.get_buff())
def save_icon(self, path):
"""
Extract the icon from the ZIP archive and save it at the given path
:param path: destination path of the icon
:return: destination path of the icon, None in case of error
"""
try:
icon = self.get_icon_path()
if icon is None:
raise Exception('Unable to get icon path')
with zipfile.ZipFile(self.apk_path) as z:
with open(path, 'wb') as f:
f.write(z.read(icon))
with Image.open(path) as _:
logging.info('Get icon from APK: success')
return path
except Exception:
logging.warning('Unable to get the icon from the APK')
return None
# TODO: Set this back once details download is working again
# logging.warning('Downloading icon from details')
# try:
# saved_path = self._get_icon_from_details(path)
# logging.debug('Icon downloaded from application details')
# return saved_path
# except Exception as e:
# logging.warning(e)
def get_icon_phash(self):
"""
Get the perceptual hash of the application icon
:return: the perceptual hash, empty string in case of error
"""
with NamedTemporaryFile() as ic:
path = self.save_icon(ic.name)
if path is None:
logging.error('Unable to save the icon')
return ''
return self.get_phash(ic.name)
@staticmethod
def get_phash(image_name):
"""
Get the perceptual hash of the given image
:param image_name: name of the image file
:return: the perceptual hash, empty string in case of error
"""
dhash.force_pil() # Force PIL
try:
image = Image.open(image_name).convert("RGBA")
row, col = dhash.dhash_row_col(image, size=PHASH_SIZE)
return row << (PHASH_SIZE * PHASH_SIZE) | col
except IOError as e:
logging.error(e)
return ''
@staticmethod
def get_icon_similarity(phash_origin, phash_candidate):
"""
Get icons similarity score [0,1.0]
:param phash_origin: original icon
:param phash_candidate: icon to be compared
:return: similarity score [0,1.0]
"""
diff = dhash.get_num_bits_different(phash_origin, phash_candidate)
return 1 - 1. * diff / (PHASH_SIZE * PHASH_SIZE * 2)
def get_application_universal_id(self):
parts = [self.get_package()]
for c in self.get_certificates():
parts.append(c.fingerprint.upper())
return sha1(' '.join(parts).encode('utf-8')).hexdigest().upper()
def get_certificates(self):
certificates = []
def _my_name_init(self, oid, value, _type=_SENTINEL):
if not isinstance(oid, ObjectIdentifier):
raise TypeError(
"oid argument must be an ObjectIdentifier instance.")
if not isinstance(value, six.text_type):
raise TypeError("value argument must be a text type.")
if len(value) == 0:
raise ValueError("Value cannot be an empty string")
if _type == _SENTINEL:
_type = _NAMEOID_DEFAULT_TYPE.get(oid, _ASN1Type.UTF8String)
if not isinstance(_type, _ASN1Type):
raise TypeError("_type must be from the _ASN1Type enum")
self._oid = oid
self._value = value
self._type = _type
NameAttribute.__init__ = _my_name_init
signs = self.apk.get_signature_names()
for s in signs:
c = self.apk.get_certificate(s)
cert = Certificate(c)
certificates.append(cert)
return certificates
def get_apk_size(self):
"""
Get the APK file size in bytes
:return: APK file size
"""
return os.path.getsize(self.apk_path)
def get_sha256(self):
"""
Get the sha256sum of the APK file
:return: hex sha256sum
"""
BLOCKSIZE = 65536
hasher = sha256()
with open(self.apk_path, 'rb') as apk:
buf = apk.read(BLOCKSIZE)
while len(buf) > 0:
hasher.update(buf)
buf = apk.read(BLOCKSIZE)
return hasher.hexdigest()
def save_embedded_classes_in_file(self, file_path):
"""
Save list of embedded classes in file.
:param file_path: file to write
"""
with open(file_path, 'w+') as f:
f.write('\n'.join(self.get_embedded_classes()))
def print_apk_infos(self):
"""
Print APK information
"""
permissions = self.get_permissions()
libraries = self.get_libraries()
certificates = self.get_certificates()
print("=== Information")
print('- APK path: {}'.format(self.apk_path))
print('- APK sum: {}'.format(self.get_sha256()))
print('- App version: {}'.format(self.get_version()))
print('- App version code: {}'.format(self.get_version_code()))
print('- App UID: {}'.format(self.get_application_universal_id()))
print('- App name: {}'.format(self.get_app_name()))
print('- App package: {}'.format(self.get_package()))
print('- App permissions: {}'.format(len(permissions)))
for perm in permissions:
print(' - {}'.format(perm))
print('- App libraries:')
for lib in libraries:
print(' - {}'.format(lib))
print('- Certificates: {}'.format(len(certificates)))
for cert in certificates:
print(' - {}'.format(cert))
def print_embedded_trackers(self):
"""
Print detected trackers
"""
trackers = self.detect_trackers()
print('=== Found trackers: {}'.format(len(trackers)))
for t in trackers:
print(' - {}'.format(t.name))
def testApksignAPKs(self):
# These APKs are from the apksign testcases and cover
# all different signature algorithms as well as some error cases
from androguard.core.bytecodes.apk import APK
import zipfile
from asn1crypto import x509, pem
import binascii
root = "examples/signing/apksig"
# Correct values generated with openssl:
certfp = {
"dsa-1024.x509.pem": "fee7c19ff9bfb4197b3727b9fd92d95406b1bd96db99ea642f5faac019a389d7",
"dsa-2048.x509.pem": "97cce0bab292c2d5afb9de90e1810b41a5d25c006a10d10982896aa12ab35a9e",
"dsa-3072.x509.pem": "966a4537058d24098ea213f12d4b24e37ff5a1d8f68deb8a753374881f23e474",
"ec-p256.x509.pem": "6a8b96e278e58f62cfe3584022cec1d0527fcb85a9e5d2e1694eb0405be5b599",
"ec-p384.x509.pem": "5e7777ada7ee7ce8f9c4d1b07094876e5604617b7988b4c5d5b764a23431afbe",
"ec-p521.x509.pem": "69b50381d98bebcd27df6d7df8af8c8b38d0e51e9168a95ab992d1a9da6082da",
"rsa-1024.x509.pem": "bc5e64eab1c4b5137c0fbc5ed05850b3a148d1c41775cffa4d96eea90bdd0eb8",
"rsa-16384.x509.pem": "f3c6b37909f6df310652fbd7c55ec27d3079dcf695dc6e75e22ba7c4e1c95601",
"rsa-2048.x509.pem": "fb5dbd3c669af9fc236c6991e6387b7f11ff0590997f22d0f5c74ff40e04fca8",
"rsa-3072.x509.pem": "483934461229a780010bc07cd6eeb0b67025fc4fe255757abbf5c3f2ed249e89",
"rsa-4096.x509.pem": "6a46158f87753395a807edcc7640ac99c9125f6b6e025bdbf461ff281e64e685",
"rsa-8192.x509.pem": "060d0a24fea9b60d857225873f78838e081795f7ef2d1ea401262bbd75a58234",
}
will_not_validate_correctly = [
"targetSandboxVersion-2.apk",
"targetSandboxVersion-2.apk",
"v1-only-with-cr-in-entry-name.apk",
"v1-only-with-lf-in-entry-name.apk",
"v1-only-with-nul-in-entry-name.apk",
"v1-only-with-rsa-1024-cert-not-der2.apk",
"v2-only-cert-and-public-key-mismatch.apk",
"v2-only-with-dsa-sha256-1024-sig-does-not-verify.apk",
]
# Collect possible hashes for certificates
# Unfortunately, not all certificates are supplied...
for apath in os.listdir(root):
if apath in certfp:
with open(os.path.join(root, apath), "rb") as fp:
cert = x509.Certificate.load(pem.unarmor(fp.read())[2])
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertEqual(h, certfp[apath])
self.assertIn(h, certfp.values())
for apath in os.listdir(root):
if apath.endswith(".apk"):
if apath == "v2-only-garbage-between-cd-and-eocd.apk" or \
apath == "v2-only-truncated-cd.apk":
# Can not load as APK
if sys.version_info.major == 2:
# Different name in python2...
with self.assertRaises(zipfile.BadZipfile):
APK(os.path.join(root, apath))
else:
with self.assertRaises(zipfile.BadZipFile):
APK(os.path.join(root, apath))
continue
elif apath in will_not_validate_correctly:
# These APKs are faulty (by design) and will return a not correct fingerprint.
# TODO: we need to check if we can prevent such errors...
continue
a = APK(os.path.join(root, apath))
self.assertIsInstance(a, APK)
# Special error cases
if apath == "v2-only-apk-sig-block-size-mismatch.apk":
with self.assertRaises(AssertionError):
a.is_signed_v2()
continue
elif apath == "v2-only-empty.apk":
with self.assertRaises(AssertionError):
a.is_signed_v2()
continue
if a.is_signed_v1():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
for c in a.get_signature_names():
a.get_certificate(c)
elif apath == "v1-only-with-rsa-1024-cert-not-der.apk":
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ","").lower()
self.assertNotIn(h, certfp.values())
# print([apath, h]) # I do not know, why put this file?
der = a.get_certificate_der(sig)
apk.show_Certificate(c, True)
apk.show_Certificate(c, False)
self.assertEqual(hashlib.sha256(der).hexdigest(), h)
pass
else:
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
der = a.get_certificate_der(sig)
self.assertEqual(hashlib.sha256(der).hexdigest(), h)
if a.is_signed_v2():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
a.get_certificates_der_v2()
elif apath == "v2-only-with-rsa-pkcs1-sha256-1024-cert-not-der.apk":
# FIXME
# Not sure what this one should do... but the certificate fingerprint is weird
# as the hash over the DER is not the same when using the certificate
continue
else:
for c in a.get_certificates_der_v2():
cert = x509.Certificate.load(c)
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
self.assertEqual(hashlib.sha256(c).hexdigest(), h)
def testApksignAPKs(self):
# These APKs are from the apksign testcases and cover
# all different signature algorithms as well as some error cases
from androguard.core.bytecodes.apk import APK
import zipfile
from asn1crypto import x509, pem
import binascii
root = "examples/signing/apksig"
# Correct values generated with openssl:
# In the apksig repo:src/test/resources/com/android/apksig
# for f in *.pem; do openssl x509 -in $f -noout -sha256 -fingerprint; done
certfp = {
'dsa-1024.x509.pem': 'fee7c19ff9bfb4197b3727b9fd92d95406b1bd96db99ea642f5faac019a389d7',
'dsa-2048.x509.pem': '97cce0bab292c2d5afb9de90e1810b41a5d25c006a10d10982896aa12ab35a9e',
'dsa-3072.x509.pem': '966a4537058d24098ea213f12d4b24e37ff5a1d8f68deb8a753374881f23e474',
'ec-p256.x509.pem': '6a8b96e278e58f62cfe3584022cec1d0527fcb85a9e5d2e1694eb0405be5b599',
'ec-p384.x509.pem': '5e7777ada7ee7ce8f9c4d1b07094876e5604617b7988b4c5d5b764a23431afbe',
'ec-p521.x509.pem': '69b50381d98bebcd27df6d7df8af8c8b38d0e51e9168a95ab992d1a9da6082da',
'rsa-1024_2.x509.pem': 'eba3685e799f59804684abebf0363e14ccb1c213e2b954a22669714ed97f61e9',
'rsa-1024.x509.pem': 'bc5e64eab1c4b5137c0fbc5ed05850b3a148d1c41775cffa4d96eea90bdd0eb8',
'rsa-16384.x509.pem': 'f3c6b37909f6df310652fbd7c55ec27d3079dcf695dc6e75e22ba7c4e1c95601',
'rsa-2048_2.x509.pem': '681b0e56a796350c08647352a4db800cc44b2adc8f4c72fa350bd05d4d50264d',
'rsa-2048_3.x509.pem': 'bb77a72efc60e66501ab75953af735874f82cfe52a70d035186a01b3482180f3',
'rsa-2048.x509.pem': 'fb5dbd3c669af9fc236c6991e6387b7f11ff0590997f22d0f5c74ff40e04fca8',
'rsa-3072.x509.pem': '483934461229a780010bc07cd6eeb0b67025fc4fe255757abbf5c3f2ed249e89',
'rsa-4096.x509.pem': '6a46158f87753395a807edcc7640ac99c9125f6b6e025bdbf461ff281e64e685',
'rsa-8192.x509.pem': '060d0a24fea9b60d857225873f78838e081795f7ef2d1ea401262bbd75a58234',
}
will_not_validate_correctly = [
"targetSandboxVersion-2.apk",
"targetSandboxVersion-2.apk",
"v1-only-with-cr-in-entry-name.apk",
"v1-only-with-lf-in-entry-name.apk",
"v1-only-with-nul-in-entry-name.apk",
"v1-only-with-rsa-1024-cert-not-der2.apk",
"v2-only-cert-and-public-key-mismatch.apk",
"v2-only-with-dsa-sha256-1024-sig-does-not-verify.apk",
"debuggable-boolean.apk",
"debuggable-resource.apk",
]
# Collect possible hashes for certificates
# Unfortunately, not all certificates are supplied...
for apath in os.listdir(root):
if apath in certfp:
with open(os.path.join(root, apath), "rb") as fp:
cert = x509.Certificate.load(pem.unarmor(fp.read())[2])
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertEqual(h, certfp[apath])
self.assertIn(h, certfp.values())
for apath in os.listdir(root):
if apath.endswith(".apk"):
if apath == "v2-only-garbage-between-cd-and-eocd.apk" or \
apath == "v2-only-truncated-cd.apk" or \
apath == "v1v2v3-with-rsa-2048-lineage-3-signers-invalid-zip.apk":
# Can not load as APK
with self.assertRaises(zipfile.BadZipFile):
APK(os.path.join(root, apath))
continue
elif apath in will_not_validate_correctly:
# These APKs are faulty (by design) and will return a not correct fingerprint.
# TODO: we need to check if we can prevent such errors...
continue
a = APK(os.path.join(root, apath))
self.assertIsInstance(a, APK)
# Test if the correct method returns True, while others return
# False
m_tests = {'1': a.is_signed_v1,
'2': a.is_signed_v2,
'3': a.is_signed_v3}
# These APKs will raise an error
excluded = [
"v1v2v3-with-rsa-2048-lineage-3-signers-no-sig-block.apk",
"v2-only-apk-sig-block-size-mismatch.apk",
"v2-only-empty.apk",
"v2-only-wrong-apk-sig-block-magic.apk",
"v2-stripped.apk",
"v2-stripped-with-ignorable-signing-schemes.apk",
"v2v3-signed-v3-block-stripped.apk",
"v3-only-empty.apk",
"v3-only-with-ecdsa-sha512-p384-wrong-apk-sig-block-magic.apk",
"v3-only-with-rsa-pkcs1-sha512-4096-apk-sig-block-size-mismatch.apk",
"v3-stripped.apk",
]
if apath[0] == "v" and apath not in excluded:
methods = apath.split("-", 1)[0].split("v")[1:]
for m, f in m_tests.items():
if m in methods:
self.assertTrue(f())
else:
self.assertFalse(f())
# Special error cases
if apath == "v2-only-apk-sig-block-size-mismatch.apk":
with self.assertRaises(apk.BrokenAPKError):
a.is_signed_v2()
continue
elif apath == "v2-only-empty.apk":
with self.assertRaises(apk.BrokenAPKError):
a.is_signed_v2()
continue
elif apath == "v3-only-with-rsa-pkcs1-sha512-4096-apk-sig-block-size-mismatch.apk":
with self.assertRaises(apk.BrokenAPKError):
a.is_signed_v3()
continue
if a.is_signed_v1():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
for c in a.get_signature_names():
a.get_certificate(c)
elif apath == "v1-only-with-rsa-1024-cert-not-der.apk":
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ","").lower()
self.assertNotIn(h, certfp.values())
# print([apath, h]) # I do not know, why put this file?
der = a.get_certificate_der(sig)
apk.show_Certificate(c, True)
apk.show_Certificate(c, False)
self.assertEqual(hashlib.sha256(der).hexdigest(), h)
pass
else:
for sig in a.get_signature_names():
c = a.get_certificate(sig)
h = c.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
der = a.get_certificate_der(sig)
self.assertEqual(hashlib.sha256(der).hexdigest(), h)
if a.is_signed_v2():
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
a.get_certificates_der_v2()
elif apath == "v2-only-with-rsa-pkcs1-sha256-1024-cert-not-der.apk":
# FIXME
# Not sure what this one should do... but the certificate fingerprint is weird
# as the hash over the DER is not the same when using the certificate
continue
else:
for c in a.get_certificates_der_v2():
cert = x509.Certificate.load(c)
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
self.assertEqual(hashlib.sha256(c).hexdigest(), h)
if a.is_signed_v3():
print(apath)
if apath == "weird-compression-method.apk":
with self.assertRaises(NotImplementedError):
a.get_certificates_der_v3()
elif apath == "v3-only-with-rsa-pkcs1-sha256-3072-sig-does-not-verify.apk" or \
apath == "v3-only-cert-and-public-key-mismatch.apk":
cert = x509.Certificate.load(a.get_certificates_der_v3()[0])
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertNotIn(h, certfp.values())
else:
for c in a.get_certificates_der_v3():
cert = x509.Certificate.load(c)
h = cert.sha256_fingerprint.replace(" ","").lower()
self.assertIn(h, certfp.values())
# Check that we get the same signature if we take the DER
self.assertEqual(hashlib.sha256(c).hexdigest(), h)
