added v3

venv/lib/python3.11/site-packages/nacl/bindings/randombytes.py

@@ -0,0 +1,51 @@
+# Copyright 2013 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 nacl import exceptions as exc
+from nacl._sodium import ffi, lib
+
+randombytes_SEEDBYTES: int = lib.randombytes_seedbytes()
+
+
+def randombytes(size: int) -> bytes:
+    """
+    Returns ``size`` number of random bytes from a cryptographically secure
+    random source.
+
+    :param size: int
+    :rtype: bytes
+    """
+    buf = ffi.new("unsigned char[]", size)
+    lib.randombytes(buf, size)
+    return ffi.buffer(buf, size)[:]
+
+
+def randombytes_buf_deterministic(size: int, seed: bytes) -> bytes:
+    """
+    Returns ``size`` number of deterministically generated pseudorandom bytes
+    from a seed
+
+    :param size: int
+    :param seed: bytes
+    :rtype: bytes
+    """
+    if len(seed) != randombytes_SEEDBYTES:
+        raise exc.TypeError(
+            "Deterministic random bytes must be generated from 32 bytes"
+        )
+
+    buf = ffi.new("unsigned char[]", size)
+    lib.randombytes_buf_deterministic(buf, size, seed)
+    return ffi.buffer(buf, size)[:]