Client authenticates now

2 files changed, 216 insertions, 0 deletions

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+MIT License
+
+Copyright (c) 2023 Xavier Sellier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
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+# Note: The code might not be as pretty it could be, since it's written
+# in a way that maximizes performance. Methods are inlined and loops are avoided.
+extends Node
+
+const BYTE_MASK: int = 0b11111111
+
+
+static func uuidbin():
+        randomize()
+        # 16 random bytes with the bytes on index 6 and 8 modified
+        return [
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                ((randi() & BYTE_MASK) & 0x0f) | 0x40,
+                randi() & BYTE_MASK,
+                ((randi() & BYTE_MASK) & 0x3f) | 0x80,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+                randi() & BYTE_MASK,
+        ]
+
+
+static func uuidbinrng(rng: RandomNumberGenerator):
+        rng.randomize()
+        return [
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                ((rng.randi() & BYTE_MASK) & 0x0f) | 0x40,
+                rng.randi() & BYTE_MASK,
+                ((rng.randi() & BYTE_MASK) & 0x3f) | 0x80,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+                rng.randi() & BYTE_MASK,
+        ]
+
+
+static func v4():
+        # 16 random bytes with the bytes on index 6 and 8 modified
+        var b = uuidbin()
+
+        return (
+                "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x"
+                % [
+                        # low
+                        b[0],
+                        b[1],
+                        b[2],
+                        b[3],
+                        # mid
+                        b[4],
+                        b[5],
+                        # hi
+                        b[6],
+                        b[7],
+                        # clock
+                        b[8],
+                        b[9],
+                        # clock
+                        b[10],
+                        b[11],
+                        b[12],
+                        b[13],
+                        b[14],
+                        b[15]
+                ]
+        )
+
+
+static func v4_rng(rng: RandomNumberGenerator):
+        # 16 random bytes with the bytes on index 6 and 8 modified
+        var b = uuidbinrng(rng)
+
+        return (
+                "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x"
+                % [
+                        # low
+                        b[0],
+                        b[1],
+                        b[2],
+                        b[3],
+                        # mid
+                        b[4],
+                        b[5],
+                        # hi
+                        b[6],
+                        b[7],
+                        # clock
+                        b[8],
+                        b[9],
+                        # clock
+                        b[10],
+                        b[11],
+                        b[12],
+                        b[13],
+                        b[14],
+                        b[15]
+                ]
+        )
+
+
+var _uuid: Array
+
+
+func _init(rng := RandomNumberGenerator.new()) -> void:
+        _uuid = uuidbinrng(rng)
+
+
+func as_array() -> Array:
+        return _uuid.duplicate()
+
+
+func as_dict(big_endian := true) -> Dictionary:
+        if big_endian:
+                return {
+                        "low": (_uuid[0] << 24) + (_uuid[1] << 16) + (_uuid[2] << 8) + _uuid[3],
+                        "mid": (_uuid[4] << 8) + _uuid[5],
+                        "hi": (_uuid[6] << 8) + _uuid[7],
+                        "clock": (_uuid[8] << 8) + _uuid[9],
+                        "node":
+                        (
+                                (_uuid[10] << 40)
+                                + (_uuid[11] << 32)
+                                + (_uuid[12] << 24)
+                                + (_uuid[13] << 16)
+                                + (_uuid[14] << 8)
+                                + _uuid[15]
+                        )
+                }
+        else:
+                return {
+                        "low": _uuid[0] + (_uuid[1] << 8) + (_uuid[2] << 16) + (_uuid[3] << 24),
+                        "mid": _uuid[4] + (_uuid[5] << 8),
+                        "hi": _uuid[6] + (_uuid[7] << 8),
+                        "clock": _uuid[8] + (_uuid[9] << 8),
+                        "node":
+                        (
+                                _uuid[10]
+                                + (_uuid[11] << 8)
+                                + (_uuid[12] << 16)
+                                + (_uuid[13] << 24)
+                                + (_uuid[14] << 32)
+                                + (_uuid[15] << 40)
+                        )
+                }
+
+
+func as_string() -> String:
+        return (
+                "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x"
+                % [
+                        # low
+                        _uuid[0],
+                        _uuid[1],
+                        _uuid[2],
+                        _uuid[3],
+                        # mid
+                        _uuid[4],
+                        _uuid[5],
+                        # hi
+                        _uuid[6],
+                        _uuid[7],
+                        # clock
+                        _uuid[8],
+                        _uuid[9],
+                        # node
+                        _uuid[10],
+                        _uuid[11],
+                        _uuid[12],
+                        _uuid[13],
+                        _uuid[14],
+                        _uuid[15]
+                ]
+        )
+
+
+func is_equal(other) -> bool:
+        # Godot Engine compares Array recursively
+        # There's no need for custom comparison here.
+        return _uuid == other._uuid