Python ecdsa.NIST256p方法代碼示例

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def extract_jwt(token, crypto_key, is_trusted=False, use_crypto=False):
    # type: (str, str, bool, bool) -> Dict[str, str]
    """Extract the claims from the validated JWT. """
    # first split and convert the jwt.
    if not token or not crypto_key:
        return {}
    if is_trusted:
        return VerifyJWT.extract_assertion(token)
    if use_crypto:
        return VerifyJWT.validate_and_extract_assertion(
            token,
            decipher_public_key(crypto_key.encode('utf8')))
    else:
        key = ecdsa.VerifyingKey.from_string(
            base64.urlsafe_b64decode(
                repad(crypto_key.encode('utf8')))[-64:],
            curve=ecdsa.NIST256p
        )
        return jwt.decode(token,
                          dict(keys=[key]),
                          options=dict(
                              verify_aud=False,
                              verify_sub=False,
                              verify_exp=False,
                          )) 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def test_with_key(self):
        private_key = ecdsa.SigningKey.generate(curve=ecdsa.NIST256p)
        claims = {"aud": "http://example.com",
                  "exp": int(time.time()) + 86400,
                  "sub": "a@example.com"}
        vapid = _get_vapid(private_key, claims)
        pk_hex = vapid['crypto-key']
        chid = str(uuid.uuid4())
        client = Client("ws://localhost:9010/")
        yield client.connect()
        yield client.hello()
        yield client.register(chid=chid, key=pk_hex)

        # Send an update with a properly formatted key.
        yield client.send_notification(vapid=vapid)

        # now try an invalid key.
        new_key = ecdsa.SigningKey.generate(curve=ecdsa.NIST256p)
        vapid = _get_vapid(new_key, claims)

        yield client.send_notification(
            vapid=vapid,
            status=401)

        yield self.shut_down(client) 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def generate_signing_key(args):
    if os.path.exists(args.keyfile):
        raise esptool.FatalError("ERROR: Key file %s already exists" % args.keyfile)
    if args.version == "1":
        """ Generate an ECDSA signing key for signing secure boot images (post-bootloader) """
        sk = ecdsa.SigningKey.generate(curve=ecdsa.NIST256p)
        with open(args.keyfile, "wb") as f:
            f.write(sk.to_pem())
        print("ECDSA NIST256p private key in PEM format written to %s" % args.keyfile)
    elif args.version == "2":
        """ Generate a RSA 3072 signing key for signing secure boot images """
        private_key = rsa.generate_private_key(
            public_exponent=65537,
            key_size=3072,
            backend=default_backend()
        ).private_bytes(
            encoding=serialization.Encoding.PEM,
            format=serialization.PrivateFormat.TraditionalOpenSSL,
            encryption_algorithm=serialization.NoEncryption()
        ).decode()
        with open(args.keyfile, "wb") as f:
            f.write(private_key)
        print("RSA 3072 private key in PEM format written to %s" % args.keyfile) 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def getPointByteSize(point):
    """Convert the point or curve bit size to bytes"""
    curveMap = {ecdsa.NIST256p.curve: 256//8,
                ecdsa.NIST384p.curve: 384//8,
                ecdsa.NIST521p.curve: (521+7)//8,
                ecdsa.SECP256k1.curve: 256//8}
    if ecdsaAllCurves:
        curveMap[ecdsa.NIST224p.curve] = 224//8
        curveMap[ecdsa.NIST192p.curve] = 192//8

    if hasattr(point, 'curve'):
        if callable(point.curve):
            return curveMap[point.curve()]
        else:
            return curveMap[point.curve]
    raise ValueError("Parameter must be a curve or point on curve") 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def _decompress_nist256(pubkey):
    """
    Load public key from the serialized blob.

    The leading byte least-significant bit is used to decide how to recreate
    the y-coordinate from the specified x-coordinate. See bitcoin/main.py#L198
    (from https://github.com/vbuterin/pybitcointools/) for details.
    """
    if pubkey[:1] in {b'\x02', b'\x03'}:  # set by ecdsa_get_public_key33()
        curve = ecdsa.NIST256p
        P = curve.curve.p()
        A = curve.curve.a()
        B = curve.curve.b()
        x = util.bytes2num(pubkey[1:33])
        beta = pow(int(x * x * x + A * x + B), int((P + 1) // 4), int(P))

        p0 = util.bytes2num(pubkey[:1])
        y = (P - beta) if ((beta + p0) % 2) else beta

        point = ecdsa.ellipticcurve.Point(curve.curve, x, y)
        return ecdsa.VerifyingKey.from_public_point(point, curve=curve,
                                                    hashfunc=hashfunc)
    else:
        return None 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def _decompress_nist256(pubkey):
    """
    Load public key from the serialized blob.

    The leading byte least-significant bit is used to decide how to recreate
    the y-coordinate from the specified x-coordinate. See bitcoin/main.py#L198
    (from https://github.com/vbuterin/pybitcointools/) for details.
    """
    if pubkey[:1] in {b'\x02', b'\x03'}:  # set by ecdsa_get_public_key33()
        curve = ecdsa.NIST256p
        P = curve.curve.p()
        A = curve.curve.a()
        B = curve.curve.b()
        x = util.bytes2num(pubkey[1:33])
        beta = pow(int(x * x * x + A * x + B), int((P + 1) // 4), int(P))

        p0 = util.bytes2num(pubkey[:1])
        y = (P - beta) if ((beta + p0) % 2) else beta

        point = ecdsa.ellipticcurve.Point(curve.curve, x, y)
        return ecdsa.VerifyingKey.from_public_point(point, curve=curve,
                                                    hashfunc=hashfunc) 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def sign_challenge(user_priv_key, app_id, client_data, counter,
                   user_presence_byte=b'\x01'):
    """
    This creates a signature for the U2F data.
    Only used in test scenario

    The calculation of the signature is described here:
    https://fidoalliance.org/specs/fido-u2f-v1.0-nfc-bt-amendment-20150514/fido-u2f-raw-message-formats.html#authentication-response-message-success

    The input_data is a concatenation of:
        * AppParameter: sha256(app_id)
        * The user presence [1byte]
        * counter [4byte]
        * ChallengeParameter: sha256(client_data)

    :param user_priv_key: The private key
    :type user_priv_key: hex string
    :param app_id: The application id
    :type app_id: str
    :param client_data: the stringified JSON
    :type client_data: str
    :param counter: the authentication counter
    :type counter: int
    :param user_presence_byte: one byte 0x01
    :type user_presence_byte: char
    :return: The DER encoded signature
    :rtype: hex string
    """
    app_id_hash = sha256(to_bytes(app_id)).digest()
    client_data_hash = sha256(to_bytes(client_data)).digest()
    counter_bin = struct.pack(">L", counter)
    input_data = app_id_hash + user_presence_byte + counter_bin + \
                 client_data_hash
    priv_key_bin = binascii.unhexlify(user_priv_key)
    sk = ecdsa.SigningKey.from_string(priv_key_bin, curve=ecdsa.NIST256p,
                                      hashfunc=sha256)
    signature = sk.sign(input_data)
    der_sig = der_encode(signature)
    return hexlify_and_unicode(der_sig) 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def _get_vapid(key=None, payload=None):
    if not payload:
        payload = {"aud": "https://pusher_origin.example.com",
                   "exp": int(time.time()) + 86400,
                   "sub": "mailto:admin@example.com"}
    if not key:
        key = ecdsa.SigningKey.generate(curve=ecdsa.NIST256p)
    vk = key.get_verifying_key()
    auth = jws.sign(payload, key, algorithm="ES256").strip('=')
    crypto_key = base64url_encode('\4' + vk.to_string())
    return {"auth": auth,
            "crypto-key": crypto_key,
            "key": key} 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def _gen_jwt(self, header, payload):
        sk256p = ecdsa.SigningKey.generate(curve=ecdsa.NIST256p)
        vk = sk256p.get_verifying_key()
        sig = jws.sign(payload, sk256p, algorithm="ES256").strip('=')
        crypto_key = utils.base64url_encode(vk.to_string()).strip('=')
        return sig, crypto_key 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def test_null_vapid_header(self):
        schema = self._make_fut()
        schema.context["conf"].use_cryptography = True

        def b64s(content):
            return base64.urlsafe_b64encode(content).strip(b'=')

        payload = b'.'.join([b64s("null"), b64s("null")])

        # force sign the header, since jws will "fix" the invalid one.
        sk256p = ecdsa.SigningKey.generate(curve=ecdsa.NIST256p)
        vk = sk256p.get_verifying_key()
        key = jwk.construct(sk256p, "ES256")
        signature = b64s(key.sign(payload))
        token = b'.'.join([payload, signature])
        crypto_key = b64s(vk.to_string())

        self.fernet_mock.decrypt.return_value = (
            'a' * 32) + sha256(utils.base64url_decode(crypto_key)).digest()
        info = self._make_test_data(
            body="asdfasdfasdfasdf",
            path_kwargs=dict(
                api_ver="v2",
                token="asdfasdf",
            ),
            headers={
                "content-encoding": "aes128gcm",
                "authorization": "vapid k={},t={}".format(crypto_key, token)
            }
        )

        with pytest.raises(InvalidRequest) as cm:
            schema.load(info)

        assert cm.value.status_code == 401
        assert cm.value.errno == 109 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def _load_ecdsa_signing_key(keyfile):
    sk = ecdsa.SigningKey.from_pem(keyfile.read())
    if sk.curve != ecdsa.NIST256p:
        raise esptool.FatalError("Signing key uses incorrect curve. ESP32 Secure Boot only supports NIST256p (openssl calls this curve 'prime256v1")
    return sk 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def verify_signature_v1(args):
    """ Verify a previously signed binary image, using the ECDSA public key """
    key_data = args.keyfile.read()
    if b"-BEGIN EC PRIVATE KEY" in key_data:
        sk = ecdsa.SigningKey.from_pem(key_data)
        vk = sk.get_verifying_key()
    elif b"-BEGIN PUBLIC KEY" in key_data:
        vk = ecdsa.VerifyingKey.from_pem(key_data)
    elif len(key_data) == 64:
        vk = ecdsa.VerifyingKey.from_string(key_data,
                                            curve=ecdsa.NIST256p)
    else:
        raise esptool.FatalError("Verification key does not appear to be an EC key in PEM format or binary EC public key data. Unsupported")

    if vk.curve != ecdsa.NIST256p:
        raise esptool.FatalError("Public key uses incorrect curve. ESP32 Secure Boot only supports NIST256p (openssl calls this curve 'prime256v1")

    binary_content = args.datafile.read()
    data = binary_content[0:-68]
    sig_version, signature = struct.unpack("I64s", binary_content[-68:])
    if sig_version != 0:
        raise esptool.FatalError("Signature block has version %d. This version  of espsecure only supports version 0." % sig_version)
    print("Verifying %d bytes of data" % len(data))
    try:
        if vk.verify(signature, data, hashlib.sha256):
            print("Signature is valid")
        else:
            raise esptool.FatalError("Signature is not valid")
    except ecdsa.keys.BadSignatureError:
        raise esptool.FatalError("Signature is not valid") 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def hex2key(hex_key):
        key_bytes = unhexlify(hex_key)
        if len(hex_key) == 64:
            return SigningKey.from_string(key_bytes, curve=NIST256p,
                    hashfunc=sha256)
        elif len(hex_key) == 128:
            return VerifyingKey.from_string(key_bytes, curve=NIST256p,
                    hashfunc=sha256)
        else:
            raise ValueError("Key in hex form is of the wrong length.") 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def decodeX962Point(data, curve=ecdsa.NIST256p):
    """Decode a point from a X9.62 encoding"""
    parser = Parser(data)
    encFormat = parser.get(1)
    assert encFormat == 4
    bytelength = getPointByteSize(curve)
    xCoord = bytesToNumber(parser.getFixBytes(bytelength))
    yCoord = bytesToNumber(parser.getFixBytes(bytelength))
    return ecdsa.ellipticcurve.Point(curve.curve, xCoord, yCoord) 

# 需要導入模塊: import ecdsa [as 別名]
# 或者: from ecdsa import NIST256p [as 別名]
def getCurveByName(curveName):
    """Return curve identified by curveName"""
    curveMap = {'secp256r1':ecdsa.NIST256p,
                'secp384r1':ecdsa.NIST384p,
                'secp521r1':ecdsa.NIST521p,
                'secp256k1':ecdsa.SECP256k1}
    if ecdsaAllCurves:
        curveMap['secp224r1'] = ecdsa.NIST224p
        curveMap['secp192r1'] = ecdsa.NIST192p

    if curveName in curveMap:
        return curveMap[curveName]
    else:
        raise ValueError("Curve of name '{0}' unknown".format(curveName))