pax_global_header00006660000000000000000000000064147452242740014525gustar00rootroot0000000000000052 comment=dff9fc05e271327046b45eafda05e29581c00a9e python-lib25519-20241004.1/000077500000000000000000000000001474522427400146155ustar00rootroot00000000000000python-lib25519-20241004.1/LICENSE000066400000000000000000000156101474522427400156250ustar00rootroot00000000000000Creative Commons Legal Code CC0 1.0 Universal CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED HEREUNDER. 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Affirmer understands and acknowledges that Creative Commons is not a party to this document and has no duty or obligation with respect to this CC0 or use of the Work. python-lib25519-20241004.1/README.md000066400000000000000000000013001474522427400160660ustar00rootroot00000000000000Python wrapper around implementation of the X25519 and Ed25519 cryptosystems ### X25519 Import library: from lib25519 import x25519 Key generation: alicepk, alicesk = x25519.keypair() bobpk, bobsk = x25519.keypair() Shared-secret generation: bobk = x25519.dh(alicepk, bobsk) alicek = x25519.dh(bobpk, alicesk) Check: assert (alicek == bobk) ### Ed25519 Import library: from lib25519 import ed25519 Key generation: alicepk, alicesk = ed25519.keypair() Signature generation: m = b'Hello' sm = ed25519.sign(m, alicesk) Signature verification and message recovery: recoveredm = ed25519.open(sm, alicepk) Check: assert (m == recoveredm) python-lib25519-20241004.1/autogen/000077500000000000000000000000001474522427400162575ustar00rootroot00000000000000python-lib25519-20241004.1/autogen/lib000077500000000000000000000011421474522427400167510ustar00rootroot00000000000000#!/usr/bin/env python3 project='lib25519' libname='25519' lib="""from ctypes.util import find_library as _find_library from ctypes import CDLL as _CDLL _libname = _find_library('%s') if _libname is None: raise FileNotFoundError("unable to locate library '%s'") _lib = _CDLL(_libname) def _check_input(x, xlen, name): if not isinstance(x, bytes): raise TypeError(f'{name} must be bytes') if xlen != -1 and xlen != len(x): raise ValueError(f'{name} length must have exactly {xlen} bytes') """ % (libname, libname) with open(f'src/{project}/_lib.py', 'w') as f: f.write(lib) python-lib25519-20241004.1/pyproject.toml000066400000000000000000000007301474522427400175310ustar00rootroot00000000000000[build-system] requires = ['setuptools'] build-backend = 'setuptools.build_meta' [project] name = 'lib25519' description = 'Python wrapper around implementation of the X25519 and Ed25519 cryptosystems' readme = 'README.md' requires-python = '>=3.7' license = {file = 'LICENSE'} authors = [ {name = 'Jan Mojžíš', email = 'jan.mojzis@gmail.com'}, ] version = '20241004.1' [tool.pytest.ini_options] minversion = '6.0' addopts = '-ra -v' testpaths = [ 'tests', ] python-lib25519-20241004.1/src/000077500000000000000000000000001474522427400154045ustar00rootroot00000000000000python-lib25519-20241004.1/src/lib25519/000077500000000000000000000000001474522427400165605ustar00rootroot00000000000000python-lib25519-20241004.1/src/lib25519/__init__.py000066400000000000000000000013661474522427400206770ustar00rootroot00000000000000''' Python wrapper around implementation of the X25519 and Ed25519 cryptosystems ### X25519 Import library: from lib25519 import x25519 Key generation: alicepk, alicesk = x25519.keypair() bobpk, bobsk = x25519.keypair() Shared-secret generation: bobk = x25519.dh(alicepk, bobsk) alicek = x25519.dh(bobpk, alicesk) Check: assert (alicek == bobk) ### Ed25519 Import library: from lib25519 import ed25519 Key generation: alicepk, alicesk = ed25519.keypair() Signature generation: m = b'Hello' sm = ed25519.sign(m, alicesk) Signature verification and message recovery: recoveredm = ed25519.open(sm, alicepk) Check: assert (m == recoveredm) ''' from .dh import x25519 from .sign import ed25519 python-lib25519-20241004.1/src/lib25519/_lib.py000066400000000000000000000007131474522427400200400ustar00rootroot00000000000000from ctypes.util import find_library as _find_library from ctypes import CDLL as _CDLL _libname = _find_library('25519') if _libname is None: raise FileNotFoundError("unable to locate library '25519'") _lib = _CDLL(_libname) def _check_input(x, xlen, name): if not isinstance(x, bytes): raise TypeError(f'{name} must be bytes') if xlen != -1 and xlen != len(x): raise ValueError(f'{name} length must have exactly {xlen} bytes') python-lib25519-20241004.1/src/lib25519/dh.py000066400000000000000000000027011474522427400175250ustar00rootroot00000000000000from typing import Tuple as _Tuple import ctypes as _ct from ._lib import _lib, _check_input class x25519: PUBLICKEYBYTES = 32 SECRETKEYBYTES = 32 BYTES = 32 def __init__(self) -> None: ''' ''' self._c_keypair = getattr(_lib, 'lib25519_dh_x25519_keypair') self._c_keypair.argtypes = [_ct.c_char_p, _ct.c_char_p] self._c_keypair.restype = None self._c_dh = getattr(_lib, 'lib25519_dh_x25519') self._c_dh.argtypes = [_ct.c_char_p, _ct.c_char_p, _ct.c_char_p] self._c_dh.restype = None def keypair(self) -> _Tuple[bytes, bytes]: ''' Keypair - randomly generates secret key and corresponding public key. Returns: pk (bytes): public key sk (bytes): secret key ''' pk = _ct.create_string_buffer(self.PUBLICKEYBYTES) sk = _ct.create_string_buffer(self.SECRETKEYBYTES) self._c_keypair(pk, sk) return pk.raw, sk.raw def dh(self, pk: bytes, sk: bytes) -> bytes: ''' Diffe-Helman - computes shared secret. Parameters: pk (bytes): public key sk (bytes): secret key Returns: k (bytes): shared secret ''' _check_input(pk, self.PUBLICKEYBYTES, 'pk') _check_input(sk, self.SECRETKEYBYTES, 'sk') k = _ct.create_string_buffer(self.BYTES) self._c_dh(k, pk, sk) return k.raw x25519 = x25519() python-lib25519-20241004.1/src/lib25519/sign.py000066400000000000000000000053441474522427400201000ustar00rootroot00000000000000from typing import Tuple as _Tuple import ctypes as _ct from ._lib import _lib, _check_input class ed25519: PUBLICKEYBYTES = 32 SECRETKEYBYTES = 64 BYTES = 64 def __init__(self) -> None: ''' ''' self._c_keypair = getattr(_lib, 'lib25519_sign_ed25519_keypair') self._c_keypair.argtypes = [_ct.c_char_p, _ct.c_char_p] self._c_keypair.restype = None self._c_sign = getattr(_lib, 'lib25519_sign_ed25519') self._c_sign.argtypes = [_ct.c_char_p, _ct.POINTER( _ct.c_longlong), _ct.c_char_p, _ct.c_longlong, _ct.c_char_p] self._c_sign.restype = None self._c_open = getattr(_lib, 'lib25519_sign_ed25519_open') self._c_open.argtypes = [_ct.c_char_p, _ct.POINTER( _ct.c_longlong), _ct.c_char_p, _ct.c_longlong, _ct.c_char_p] self._c_open.restype = _ct.c_int def keypair(self) -> _Tuple[bytes, bytes]: ''' Keypair - randomly generates secret key and corresponding public key. Returns: pk (bytes): public key sk (bytes): secret key ''' pk = _ct.create_string_buffer(self.PUBLICKEYBYTES) sk = _ct.create_string_buffer(self.SECRETKEYBYTES) self._c_keypair(pk, sk) return pk.raw, sk.raw def sign(self, m: bytes, sk: bytes) -> bytes: ''' Signature generation - signs the message 'm' using secret key 'sk' and returns signed message 'sm'. Parameters: m (bytes): message sk (bytes): secret key Returns: sm (bytes): signed message ''' _check_input(m, -1, 'm') _check_input(sk, self.SECRETKEYBYTES, 'sk') mlen = _ct.c_longlong(len(m)) smlen = _ct.c_longlong(0) sm = _ct.create_string_buffer(len(m) + self.BYTES) m = _ct.create_string_buffer(m) sk = _ct.create_string_buffer(sk) self._c_sign(sm, _ct.byref(smlen), m, mlen, sk) return sm.raw[:smlen.value] def open(self, sm: bytes, pk: bytes) -> bytes: ''' Signature verification and message recovery - verifies the signed message 'sm' using public key 'pk', and then returns the verified message 'm'. Parameters: sm (bytes): signed message pk (bytes): public key Returns: m (bytes): message ''' _check_input(sm, -1, 'sm') _check_input(pk, self.PUBLICKEYBYTES, 'pk') smlen = _ct.c_longlong(len(sm)) m = _ct.create_string_buffer(len(sm)) mlen = _ct.c_longlong(0) pk = _ct.create_string_buffer(pk) if self._c_open(m, _ct.byref(mlen), sm, smlen, pk): raise Exception('open failed') return m.raw[:mlen.value] ed25519 = ed25519() python-lib25519-20241004.1/tests/000077500000000000000000000000001474522427400157575ustar00rootroot00000000000000python-lib25519-20241004.1/tests/test_ed25519.py000066400000000000000000000003621474522427400203670ustar00rootroot00000000000000from lib25519 import ed25519 import os def test_ed25519(): pk, sk = ed25519.keypair() m1 = os.urandom(128) sm = ed25519.sign(m1, sk) m2 = ed25519.open(sm, pk) assert (m1 == m2) if __name__ == 'main': test_ed25519() python-lib25519-20241004.1/tests/test_x25519.py000066400000000000000000000003541474522427400202470ustar00rootroot00000000000000from lib25519 import x25519 def test_x25519(): pk1, sk1 = x25519.keypair() pk2, sk2 = x25519.keypair() k1 = x25519.dh(pk1, sk2) k2 = x25519.dh(pk2, sk1) assert (k1 == k2) if __name__ == 'main': test_x25519()