mirror of
https://github.com/InfiniTimeOrg/InfiniTime.git
synced 2024-12-29 04:33:25 +03:00
116 lines
3.7 KiB
Python
116 lines
3.7 KiB
Python
|
"""
|
||
|
|
Tests for RSA keys
|
||
|
|
"""
|
||
|
|
|
||
|
|
import io
|
||
|
|
import os
|
||
|
|
import sys
|
||
|
|
import tempfile
|
||
|
|
import unittest
|
||
|
|
|
||
|
|
from cryptography.exceptions import InvalidSignature
|
||
|
|
from cryptography.hazmat.primitives.asymmetric.padding import PSS, MGF1
|
||
|
|
from cryptography.hazmat.primitives.hashes import SHA256
|
||
|
|
|
||
|
|
# Setup sys path so 'imgtool' is in it.
|
||
|
|
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__),
|
||
|
|
'../..')))
|
||
|
|
|
||
|
|
from imgtool.keys import load, RSA, RSAUsageError
|
||
|
|
from imgtool.keys.rsa import RSA_KEY_SIZES
|
||
|
|
|
||
|
|
|
||
|
|
class KeyGeneration(unittest.TestCase):
|
||
|
|
|
||
|
|
def setUp(self):
|
||
|
|
self.test_dir = tempfile.TemporaryDirectory()
|
||
|
|
|
||
|
|
def tname(self, base):
|
||
|
|
return os.path.join(self.test_dir.name, base)
|
||
|
|
|
||
|
|
def tearDown(self):
|
||
|
|
self.test_dir.cleanup()
|
||
|
|
|
||
|
|
def test_keygen(self):
|
||
|
|
# Try generating a RSA key with non-supported size
|
||
|
|
with self.assertRaises(RSAUsageError):
|
||
|
|
RSA.generate(key_size=1024)
|
||
|
|
|
||
|
|
for key_size in RSA_KEY_SIZES:
|
||
|
|
name1 = self.tname("keygen.pem")
|
||
|
|
k = RSA.generate(key_size=key_size)
|
||
|
|
k.export_private(name1, b'secret')
|
||
|
|
|
||
|
|
# Try loading the key without a password.
|
||
|
|
self.assertIsNone(load(name1))
|
||
|
|
|
||
|
|
k2 = load(name1, b'secret')
|
||
|
|
|
||
|
|
pubname = self.tname('keygen-pub.pem')
|
||
|
|
k2.export_public(pubname)
|
||
|
|
pk2 = load(pubname)
|
||
|
|
|
||
|
|
# We should be able to export the public key from the loaded
|
||
|
|
# public key, but not the private key.
|
||
|
|
pk2.export_public(self.tname('keygen-pub2.pem'))
|
||
|
|
self.assertRaises(RSAUsageError, pk2.export_private,
|
||
|
|
self.tname('keygen-priv2.pem'))
|
||
|
|
|
||
|
|
def test_emit(self):
|
||
|
|
"""Basic sanity check on the code emitters."""
|
||
|
|
for key_size in RSA_KEY_SIZES:
|
||
|
|
k = RSA.generate(key_size=key_size)
|
||
|
|
|
||
|
|
ccode = io.StringIO()
|
||
|
|
k.emit_c_public(ccode)
|
||
|
|
self.assertIn("rsa_pub_key", ccode.getvalue())
|
||
|
|
self.assertIn("rsa_pub_key_len", ccode.getvalue())
|
||
|
|
|
||
|
|
rustcode = io.StringIO()
|
||
|
|
k.emit_rust_public(rustcode)
|
||
|
|
self.assertIn("RSA_PUB_KEY", rustcode.getvalue())
|
||
|
|
|
||
|
|
def test_emit_pub(self):
|
||
|
|
"""Basic sanity check on the code emitters, from public key."""
|
||
|
|
pubname = self.tname("public.pem")
|
||
|
|
for key_size in RSA_KEY_SIZES:
|
||
|
|
k = RSA.generate(key_size=key_size)
|
||
|
|
k.export_public(pubname)
|
||
|
|
|
||
|
|
k2 = load(pubname)
|
||
|
|
|
||
|
|
ccode = io.StringIO()
|
||
|
|
k2.emit_c_public(ccode)
|
||
|
|
self.assertIn("rsa_pub_key", ccode.getvalue())
|
||
|
|
self.assertIn("rsa_pub_key_len", ccode.getvalue())
|
||
|
|
|
||
|
|
rustcode = io.StringIO()
|
||
|
|
k2.emit_rust_public(rustcode)
|
||
|
|
self.assertIn("RSA_PUB_KEY", rustcode.getvalue())
|
||
|
|
|
||
|
|
def test_sig(self):
|
||
|
|
for key_size in RSA_KEY_SIZES:
|
||
|
|
k = RSA.generate(key_size=key_size)
|
||
|
|
buf = b'This is the message'
|
||
|
|
sig = k.sign(buf)
|
||
|
|
|
||
|
|
# The code doesn't have any verification, so verify this
|
||
|
|
# manually.
|
||
|
|
k.key.public_key().verify(
|
||
|
|
signature=sig,
|
||
|
|
data=buf,
|
||
|
|
padding=PSS(mgf=MGF1(SHA256()), salt_length=32),
|
||
|
|
algorithm=SHA256())
|
||
|
|
|
||
|
|
# Modify the message to make sure the signature fails.
|
||
|
|
self.assertRaises(InvalidSignature,
|
||
|
|
k.key.public_key().verify,
|
||
|
|
signature=sig,
|
||
|
|
data=b'This is thE message',
|
||
|
|
padding=PSS(mgf=MGF1(SHA256()), salt_length=32),
|
||
|
|
algorithm=SHA256())
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
unittest.main()
|