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(ccode)
self.assertIn("rsa_pub_key", ccode.getvalue())
self.assertIn("rsa_pub_key_len", ccode.getvalue())
rustcode = io.StringIO()
k.emit_rust(rustcode)
self.assertIn("RSA_PUB_KEY", rustcode.getvalue())
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_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(ccode)
self.assertIn("rsa_pub_key", ccode.getvalue())
self.assertIn("rsa_pub_key_len", ccode.getvalue())
rustcode = io.StringIO()
k2.emit_rust(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())