first commit

.venv/Lib/site-packages/joserfc/util.py

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+from typing import Any
+import base64
+import struct
+import binascii
+import json
+
+
+def to_bytes(x: Any, charset: str = "utf-8", errors: str = "strict") -> bytes:
+    if isinstance(x, bytes):
+        return x
+    if isinstance(x, str):
+        return x.encode(charset, errors)
+    if isinstance(x, (int, float)):
+        return str(x).encode(charset, errors)
+    return bytes(x)
+
+
+def to_str(x: bytes | str, charset: str = "utf-8") -> str:
+    if isinstance(x, bytes):
+        return x.decode(charset)
+    return x
+
+
+def urlsafe_b64decode(s: bytes) -> bytes:
+    if b"+" in s or b"/" in s or b"=" in s:
+        raise binascii.Error
+
+    pad = -len(s) % 4
+    if pad == 3:
+        raise binascii.Error
+
+    safe_ending = (b"AEIMQUYcgkosw048", b"AQgw")
+    if pad and s[-1] not in safe_ending[pad - 1]:
+        raise binascii.Error
+
+    s += b"=" * pad
+    return base64.b64decode(s, b"-_", validate=True)
+
+
+def urlsafe_b64encode(s: bytes) -> bytes:
+    return base64.urlsafe_b64encode(s).rstrip(b"=")
+
+
+def base64_to_int(s: str) -> int:
+    data = urlsafe_b64decode(to_bytes(s))
+    buf = struct.unpack("%sB" % len(data), data)
+    return int("".join(["%02x" % byte for byte in buf]), 16)
+
+
+def int_to_base64(num: int, byte_count: int | None = None) -> str:
+    if num < 0:
+        raise ValueError("Must be a positive integer")
+
+    if byte_count is None:
+        byte_count = (num.bit_length() + 7) // 8
+    elif num.bit_length() > byte_count * 8:
+        raise ValueError("Number too large for byte count")
+
+    s = num.to_bytes(byte_count, "big", signed=False)
+    return urlsafe_b64encode(s).decode("utf-8", "strict")
+
+
+def json_b64encode(data: dict[str, Any]) -> bytes:
+    text = json.dumps(data, ensure_ascii=True, separators=(",", ":"))
+    return urlsafe_b64encode(to_bytes(text, "ascii"))
+
+
+def json_b64decode(text: bytes) -> Any:
+    return json.loads(urlsafe_b64decode(text))