def v2_verify(sm, pk, f=None):
h = V2_PUBLIC
sm, fi = _unpack_msg(h, sm, f)
siglen = sodium.crypto_sign_BYTES
m = sm[:-siglen]
s = sm[-siglen:]
m2 = pae([h, m, fi])
with _translate_exc(
naclexc.BadSignatureError,
pexc.BadSignatureError,
msg=BAD_SIGNATURE_ERR,
truncate=True,
):
sodium.crypto_sign_open(s + m2, pk)
return m, fi
def test_sign():
seed = b"\x00" * c.crypto_sign_SEEDBYTES
pubkey, secretkey = c.crypto_sign_seed_keypair(seed)
assert len(pubkey) == c.crypto_sign_PUBLICKEYBYTES
assert len(secretkey) == c.crypto_sign_SECRETKEYBYTES
pubkey, secretkey = c.crypto_sign_keypair()
assert len(pubkey) == c.crypto_sign_PUBLICKEYBYTES
assert len(secretkey) == c.crypto_sign_SECRETKEYBYTES
msg = b"message"
sigmsg = c.crypto_sign(msg, secretkey)
assert len(sigmsg) == len(msg) + c.crypto_sign_BYTES
msg2 = c.crypto_sign_open(sigmsg, pubkey)
assert msg2 == msg
def test_sign():
seed = b"\x00" * c.crypto_sign_SEEDBYTES
pubkey, secretkey = c.crypto_sign_seed_keypair(seed)
assert len(pubkey) == c.crypto_sign_PUBLICKEYBYTES
assert len(secretkey) == c.crypto_sign_SECRETKEYBYTES
pubkey, secretkey = c.crypto_sign_keypair()
assert len(pubkey) == c.crypto_sign_PUBLICKEYBYTES
assert len(secretkey) == c.crypto_sign_SECRETKEYBYTES
msg = b"message"
sigmsg = c.crypto_sign(msg, secretkey)
assert len(sigmsg) == len(msg) + c.crypto_sign_BYTES
msg2 = c.crypto_sign_open(sigmsg, pubkey)
assert msg2 == msg
def crypto_sign_open(self, sm, pk):
try:
return bindings.crypto_sign_open(sm, pk)
except Exception as e:
raise BadSignatureException(e)