mirror of
https://github.com/luxfi/crypto.git
synced 2026-10-30 16:59:13 +00:00
zeekay
bbbd5fa1b3
Brand stays in import path only; symbols, env vars, and exports are brand-neutral. One-release backwards-compat shim reads deprecated LUX_ names with deprecation log. Env: CRYPTO_BACKEND, CRYPTO_DIR, CRYPTO_BUILD_DIR, CRYPTO_LIB_DIR, CRYPTO_LIB are canonical. Rust: idiomatic Secp256k1Status enum; extern fn names dropped lux_ prefix. TS/Python: cryptoAvailable / crypto_available; FFI symbol strings drop lux_ prefix to match renamed C-ABI in luxcpp/crypto. cabi/main.go: //export names drop lux_ prefix (mlkem768_*, mldsa65_*).
80 lines
1.9 KiB
Python
80 lines
1.9 KiB
Python
"""FFI layer — loads libluxcrypto shared library."""
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from __future__ import annotations
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import ctypes
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import ctypes.util
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import os
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import sys
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import warnings
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from pathlib import Path
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_LIB: ctypes.CDLL | None = None
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crypto_available = False
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def _env_lib() -> str | None:
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"""Read CRYPTO_LIB; fall back to deprecated LUX_CRYPTO_LIB for one release."""
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v = os.environ.get("CRYPTO_LIB")
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if v:
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return v
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v = os.environ.get("LUX_CRYPTO_LIB")
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if v:
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warnings.warn(
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"LUX_CRYPTO_LIB is deprecated; use CRYPTO_LIB",
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DeprecationWarning,
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stacklevel=2,
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)
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return v
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return None
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def _find_lib() -> str | None:
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"""Find libluxcrypto on the system."""
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# 1. Env var override
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env = _env_lib()
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if env and os.path.isfile(env):
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return env
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# 2. Adjacent to this package (e.g. wheel ships the .dylib/.so)
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here = Path(__file__).parent
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for name in ("libluxcrypto.dylib", "libluxcrypto.so", "libluxcrypto.dll"):
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p = here / name
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if p.exists():
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return str(p)
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# 3. In the lux/crypto/dist build output
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dist = Path.home() / "work" / "lux" / "crypto" / "dist"
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for name in ("libluxcrypto.dylib", "libluxcrypto.so", "libluxcrypto.dll"):
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p = dist / name
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if p.exists():
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return str(p)
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# 4. System library path
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found = ctypes.util.find_library("luxcrypto")
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return found
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def _load() -> ctypes.CDLL | None:
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path = _find_lib()
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if path is None:
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return None
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try:
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return ctypes.CDLL(path)
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except OSError:
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return None
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_LIB = _load()
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crypto_available = _LIB is not None
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def get_lib() -> ctypes.CDLL:
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"""Get the loaded library, raising if unavailable."""
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if _LIB is None:
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raise RuntimeError(
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"libluxcrypto not found. Build it with: "
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"cd ~/work/lux/crypto && make lib"
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)
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return _LIB
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