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# SPDX-License-Identifier: MIT
from __future__ import annotations
import ctypes
import ctypes.util
import os
import platform
import re
import sys
from contextlib import suppress
from setuptools import Extension, find_packages, setup # type: ignore
def _get_version():
pattern = re.compile(r'^__version__ = ["]([.\w]+?)["]')
with open(
os.path.join(
os.path.dirname(__file__), "src", "mbedtls", "__init__.py"
),
encoding="utf-8",
) as f:
for line in f:
match = pattern.match(line)
if match:
return match.group(1)
raise RuntimeError()
VERSION = _get_version()
MBEDTLS_VERSION = "2.28.8"
DOWNLOAD_URL = f"https://github.com/Synss/python-mbedtls/tarball/{VERSION}"
__mbedtls_version_info__ = tuple(map(int, MBEDTLS_VERSION.split(".")))
__mbedtls_url__ = "https://tls.mbed.org"
if "--with-coverage" in sys.argv:
sys.argv.remove("--with-coverage")
COVERAGE = True
else:
COVERAGE = False
setup_requires = [
# Setuptools 18.0 properly handles Cython extensions.
"setuptools >= 18.0",
# Cython 0.28 handles const memoryviews.
"cython >= 0.28.0",
]
install_requires = [
"certifi",
"typing_extensions",
]
tests_require = [
"readme_renderer",
]
def mbedtls_version(lib):
null = b"\0"
output = 18 * null
output_p = ctypes.c_char_p(output)
lib.mbedtls_version_get_string_full(output_p)
return output.strip(null).decode("ascii")
def mbedtls_version_info(lib):
version = lib.mbedtls_version_get_number()
return tuple(version >> shift & 0xFF for shift in (24, 16, 8))
def check_mbedtls_support(version, url):
library = ctypes.util.find_library("mbedtls")
if not library:
print(" Library not found", file=sys.stderr)
print(
" The paths are probably not set correctly but let's try anyway",
file=sys.stderr,
)
return
try:
lib = ctypes.cdll.LoadLibrary(library)
print(
# pylint: disable=protected-access
f" loading: {lib._name!r}\n",
file=sys.stdout,
)
print(f" mbedtls version: {mbedtls_version(lib)!s}", file=sys.stdout)
print(f" python-mbedtls version: {VERSION}", file=sys.stdout)
except OSError as exc:
lib = None
print(f" {exc!s}", file=sys.stderr)
if lib and mbedtls_version_info(lib) < version[:2]:
print(
f" python-mbedtls requires at least mbedtls {version[0]}.{version[1]}",
file=sys.stderr,
)
print(
f" The latest version of mbedtls may be obtained from {url}.",
file=sys.stderr,
)
sys.exit(1)
def extensions(coverage=False):
def from_env(var):
with suppress(KeyError):
return filter(None, os.environ[var].split(ENVSEP))
return ()
WINDOWS = platform.system() == "Windows"
ENVSEP = ";" if WINDOWS else ":"
libraries = (
[
"AdvAPI32", # `Crypt*` calls from `library/entropy_poll.c`
"mbedTLS",
]
if WINDOWS
else ["mbedcrypto", "mbedtls", "mbedx509"]
)
library_dirs = list(from_env("LIB" if WINDOWS else "LIBRARY_PATH"))
for dirpath, _, filenames in os.walk("src"):
for fn in filenames:
root, ext = os.path.splitext(fn)
if ext != ".pyx":
continue
mod = ".".join(dirpath.split(os.sep)[1:] + [root])
extension = Extension(
mod,
sources=[os.path.join(dirpath, fn)],
library_dirs=library_dirs,
libraries=libraries,
define_macros=(
[
("CYTHON_TRACE", "1"),
("CYTHON_TRACE_NOGIL", "1"),
]
if coverage
else []
),
)
extension.cython_directives = {"language_level": "3str"}
if coverage:
extension.cython_directives["linetrace"] = True
yield extension
def options(coverage=False):
if coverage:
return {}
v = sys.version_info
return {
"build": {
"build_base": os.sep.join(("build", f"{v[0]}.{v[1]}.{v[2]}"))
},
"build_ext": {"cython_c_in_temp": True},
}
def readme():
with open("README.rst", encoding="utf-8") as f:
return f.read().replace(":math:", "")
if len(sys.argv) > 1 and any(
(sys.argv[1].startswith("build"), sys.argv[1].startswith("bdist"))
):
check_mbedtls_support(
version=__mbedtls_version_info__, url=__mbedtls_url__
)
setup(
name="python-mbedtls",
version=VERSION,
description=(
"hash, hmac, RSA, ECC, X.509, TLS, DTLS, handshakes, and secrets "
"with an mbed TLS back end"
),
long_description=readme(),
long_description_content_type="text/x-rst",
author="Mathias Laurin",
author_email="Mathias.Laurin@github.com",
license="MIT License",
url="https://github.com/Synss/python-mbedtls",
download_url=DOWNLOAD_URL,
ext_modules=list(extensions(COVERAGE)),
options=options(COVERAGE),
package_data={"mbedtls": ["py.typed", "**.pyi", "cipher/**pyi"]},
package_dir={"": "src"},
packages=find_packages("src"),
setup_requires=setup_requires,
install_requires=install_requires,
tests_require=tests_require,
classifiers=[
"Development Status :: 5 - Production/Stable",
"Programming Language :: Cython",
"Programming Language :: Python :: 3",
"License :: OSI Approved :: MIT License",
"Topic :: Security :: Cryptography",
],
)
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