two version of R2R are hereHEADmaster

1 files changed, 200 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/nacl/bindings/crypto_kx.py b/.venv/lib/python3.12/site-packages/nacl/bindings/crypto_kx.py
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+# Copyright 2018 Donald Stufft and individual contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from typing import Tuple
+
+from nacl import exceptions as exc
+from nacl._sodium import ffi, lib
+from nacl.exceptions import ensure
+
+__all__ = [
+    "crypto_kx_keypair",
+    "crypto_kx_client_session_keys",
+    "crypto_kx_server_session_keys",
+    "crypto_kx_PUBLIC_KEY_BYTES",
+    "crypto_kx_SECRET_KEY_BYTES",
+    "crypto_kx_SEED_BYTES",
+    "crypto_kx_SESSION_KEY_BYTES",
+]
+
+"""
+Implementations of client, server key exchange
+"""
+crypto_kx_PUBLIC_KEY_BYTES: int = lib.crypto_kx_publickeybytes()
+crypto_kx_SECRET_KEY_BYTES: int = lib.crypto_kx_secretkeybytes()
+crypto_kx_SEED_BYTES: int = lib.crypto_kx_seedbytes()
+crypto_kx_SESSION_KEY_BYTES: int = lib.crypto_kx_sessionkeybytes()
+
+
+def crypto_kx_keypair() -> Tuple[bytes, bytes]:
+    """
+    Generate a keypair.
+    This is a duplicate crypto_box_keypair, but
+    is included for api consistency.
+    :return: (public_key, secret_key)
+    :rtype: (bytes, bytes)
+    """
+    public_key = ffi.new("unsigned char[]", crypto_kx_PUBLIC_KEY_BYTES)
+    secret_key = ffi.new("unsigned char[]", crypto_kx_SECRET_KEY_BYTES)
+    res = lib.crypto_kx_keypair(public_key, secret_key)
+    ensure(res == 0, "Key generation failed.", raising=exc.CryptoError)
+
+    return (
+        ffi.buffer(public_key, crypto_kx_PUBLIC_KEY_BYTES)[:],
+        ffi.buffer(secret_key, crypto_kx_SECRET_KEY_BYTES)[:],
+    )
+
+
+def crypto_kx_seed_keypair(seed: bytes) -> Tuple[bytes, bytes]:
+    """
+    Generate a keypair with a given seed.
+    This is functionally the same as crypto_box_seed_keypair, however
+    it uses the blake2b hash primitive instead of sha512.
+    It is included mainly for api consistency when using crypto_kx.
+    :param seed: random seed
+    :type seed: bytes
+    :return: (public_key, secret_key)
+    :rtype: (bytes, bytes)
+    """
+    public_key = ffi.new("unsigned char[]", crypto_kx_PUBLIC_KEY_BYTES)
+    secret_key = ffi.new("unsigned char[]", crypto_kx_SECRET_KEY_BYTES)
+    ensure(
+        isinstance(seed, bytes) and len(seed) == crypto_kx_SEED_BYTES,
+        "Seed must be a {} byte long bytes sequence".format(
+            crypto_kx_SEED_BYTES
+        ),
+        raising=exc.TypeError,
+    )
+    res = lib.crypto_kx_seed_keypair(public_key, secret_key, seed)
+    ensure(res == 0, "Key generation failed.", raising=exc.CryptoError)
+
+    return (
+        ffi.buffer(public_key, crypto_kx_PUBLIC_KEY_BYTES)[:],
+        ffi.buffer(secret_key, crypto_kx_SECRET_KEY_BYTES)[:],
+    )
+
+
+def crypto_kx_client_session_keys(
+    client_public_key: bytes,
+    client_secret_key: bytes,
+    server_public_key: bytes,
+) -> Tuple[bytes, bytes]:
+    """
+    Generate session keys for the client.
+    :param client_public_key:
+    :type client_public_key: bytes
+    :param client_secret_key:
+    :type client_secret_key: bytes
+    :param server_public_key:
+    :type server_public_key: bytes
+    :return: (rx_key, tx_key)
+    :rtype: (bytes, bytes)
+    """
+    ensure(
+        isinstance(client_public_key, bytes)
+        and len(client_public_key) == crypto_kx_PUBLIC_KEY_BYTES,
+        "Client public key must be a {} bytes long bytes sequence".format(
+            crypto_kx_PUBLIC_KEY_BYTES
+        ),
+        raising=exc.TypeError,
+    )
+    ensure(
+        isinstance(client_secret_key, bytes)
+        and len(client_secret_key) == crypto_kx_SECRET_KEY_BYTES,
+        "Client secret key must be a {} bytes long bytes sequence".format(
+            crypto_kx_PUBLIC_KEY_BYTES
+        ),
+        raising=exc.TypeError,
+    )
+    ensure(
+        isinstance(server_public_key, bytes)
+        and len(server_public_key) == crypto_kx_PUBLIC_KEY_BYTES,
+        "Server public key must be a {} bytes long bytes sequence".format(
+            crypto_kx_PUBLIC_KEY_BYTES
+        ),
+        raising=exc.TypeError,
+    )
+
+    rx_key = ffi.new("unsigned char[]", crypto_kx_SESSION_KEY_BYTES)
+    tx_key = ffi.new("unsigned char[]", crypto_kx_SESSION_KEY_BYTES)
+    res = lib.crypto_kx_client_session_keys(
+        rx_key, tx_key, client_public_key, client_secret_key, server_public_key
+    )
+    ensure(
+        res == 0,
+        "Client session key generation failed.",
+        raising=exc.CryptoError,
+    )
+
+    return (
+        ffi.buffer(rx_key, crypto_kx_SESSION_KEY_BYTES)[:],
+        ffi.buffer(tx_key, crypto_kx_SESSION_KEY_BYTES)[:],
+    )
+
+
+def crypto_kx_server_session_keys(
+    server_public_key: bytes,
+    server_secret_key: bytes,
+    client_public_key: bytes,
+) -> Tuple[bytes, bytes]:
+    """
+    Generate session keys for the server.
+    :param server_public_key:
+    :type server_public_key: bytes
+    :param server_secret_key:
+    :type server_secret_key: bytes
+    :param client_public_key:
+    :type client_public_key: bytes
+    :return: (rx_key, tx_key)
+    :rtype: (bytes, bytes)
+    """
+    ensure(
+        isinstance(server_public_key, bytes)
+        and len(server_public_key) == crypto_kx_PUBLIC_KEY_BYTES,
+        "Server public key must be a {} bytes long bytes sequence".format(
+            crypto_kx_PUBLIC_KEY_BYTES
+        ),
+        raising=exc.TypeError,
+    )
+    ensure(
+        isinstance(server_secret_key, bytes)
+        and len(server_secret_key) == crypto_kx_SECRET_KEY_BYTES,
+        "Server secret key must be a {} bytes long bytes sequence".format(
+            crypto_kx_PUBLIC_KEY_BYTES
+        ),
+        raising=exc.TypeError,
+    )
+    ensure(
+        isinstance(client_public_key, bytes)
+        and len(client_public_key) == crypto_kx_PUBLIC_KEY_BYTES,
+        "Client public key must be a {} bytes long bytes sequence".format(
+            crypto_kx_PUBLIC_KEY_BYTES
+        ),
+        raising=exc.TypeError,
+    )
+
+    rx_key = ffi.new("unsigned char[]", crypto_kx_SESSION_KEY_BYTES)
+    tx_key = ffi.new("unsigned char[]", crypto_kx_SESSION_KEY_BYTES)
+    res = lib.crypto_kx_server_session_keys(
+        rx_key, tx_key, server_public_key, server_secret_key, client_public_key
+    )
+    ensure(
+        res == 0,
+        "Server session key generation failed.",
+        raising=exc.CryptoError,
+    )
+
+    return (
+        ffi.buffer(rx_key, crypto_kx_SESSION_KEY_BYTES)[:],
+        ffi.buffer(tx_key, crypto_kx_SESSION_KEY_BYTES)[:],
+    )