25f35c7d0e
This new FW is build on the same codebasse than the actual InfiniTime. Only the display task is different (this allows to remove lvgl from the recovery fw, which is very heavy). CMake builds and docker have been modified accordingly. Note than the fw is converted into an image and then into a DFU in the cmake build (previously, it was only done in the
100 lines
2.9 KiB
Python
100 lines
2.9 KiB
Python
"""
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Tests for ECDSA keys
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"""
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import io
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import os.path
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import sys
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import tempfile
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import unittest
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from cryptography.exceptions import InvalidSignature
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from cryptography.hazmat.primitives.asymmetric import ec
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from cryptography.hazmat.primitives.hashes import SHA256
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sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '../..')))
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from imgtool.keys import load, ECDSA256P1, ECDSAUsageError
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class EcKeyGeneration(unittest.TestCase):
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def setUp(self):
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self.test_dir = tempfile.TemporaryDirectory()
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def tname(self, base):
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return os.path.join(self.test_dir.name, base)
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def tearDown(self):
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self.test_dir.cleanup()
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def test_keygen(self):
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name1 = self.tname("keygen.pem")
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k = ECDSA256P1.generate()
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k.export_private(name1, b'secret')
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self.assertIsNone(load(name1))
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k2 = load(name1, b'secret')
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pubname = self.tname('keygen-pub.pem')
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k2.export_public(pubname)
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pk2 = load(pubname)
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# We should be able to export the public key from the loaded
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# public key, but not the private key.
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pk2.export_public(self.tname('keygen-pub2.pem'))
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self.assertRaises(ECDSAUsageError,
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pk2.export_private, self.tname('keygen-priv2.pem'))
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def test_emit(self):
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"""Basic sanity check on the code emitters."""
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k = ECDSA256P1.generate()
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ccode = io.StringIO()
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k.emit_c_public(ccode)
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self.assertIn("ecdsa_pub_key", ccode.getvalue())
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self.assertIn("ecdsa_pub_key_len", ccode.getvalue())
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rustcode = io.StringIO()
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k.emit_rust_public(rustcode)
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self.assertIn("ECDSA_PUB_KEY", rustcode.getvalue())
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def test_emit_pub(self):
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"""Basic sanity check on the code emitters."""
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pubname = self.tname("public.pem")
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k = ECDSA256P1.generate()
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k.export_public(pubname)
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k2 = load(pubname)
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ccode = io.StringIO()
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k2.emit_c_public(ccode)
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self.assertIn("ecdsa_pub_key", ccode.getvalue())
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self.assertIn("ecdsa_pub_key_len", ccode.getvalue())
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rustcode = io.StringIO()
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k2.emit_rust_public(rustcode)
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self.assertIn("ECDSA_PUB_KEY", rustcode.getvalue())
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def test_sig(self):
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k = ECDSA256P1.generate()
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buf = b'This is the message'
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sig = k.raw_sign(buf)
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# The code doesn't have any verification, so verify this
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# manually.
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k.key.public_key().verify(
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signature=sig,
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data=buf,
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signature_algorithm=ec.ECDSA(SHA256()))
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# Modify the message to make sure the signature fails.
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self.assertRaises(InvalidSignature,
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k.key.public_key().verify,
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signature=sig,
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data=b'This is thE message',
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signature_algorithm=ec.ECDSA(SHA256()))
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if __name__ == '__main__':
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unittest.main()
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