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gh-132710: only use stable _uuid.generate_time_safe() to deduce MAC address (#132901)
This commit is contained in:
Bénédikt Tran
GitHub
parent
29e8115964
commit
3bffada467
6 changed files with 357 additions and 28 deletions
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@ -14,6 +14,7 @@ from unittest import mock
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from test import support
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from test.support import import_helper
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from test.support.script_helper import assert_python_ok
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py_uuid = import_helper.import_fresh_module('uuid', blocked=['_uuid'])
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c_uuid = import_helper.import_fresh_module('uuid', fresh=['_uuid'])
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@ -1217,10 +1218,37 @@ class BaseTestUUID:
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class TestUUIDWithoutExtModule(BaseTestUUID, unittest.TestCase):
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uuid = py_uuid
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@unittest.skipUnless(c_uuid, 'requires the C _uuid module')
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class TestUUIDWithExtModule(BaseTestUUID, unittest.TestCase):
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uuid = c_uuid
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def check_has_stable_libuuid_extractable_node(self):
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if not self.uuid._has_stable_extractable_node:
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self.skipTest("libuuid cannot deduce MAC address")
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@unittest.skipUnless(os.name == 'posix', 'POSIX only')
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def test_unix_getnode_from_libuuid(self):
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self.check_has_stable_libuuid_extractable_node()
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script = 'import uuid; print(uuid._unix_getnode())'
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_, n_a, _ = assert_python_ok('-c', script)
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_, n_b, _ = assert_python_ok('-c', script)
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n_a, n_b = n_a.decode().strip(), n_b.decode().strip()
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self.assertTrue(n_a.isdigit())
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self.assertTrue(n_b.isdigit())
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self.assertEqual(n_a, n_b)
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@unittest.skipUnless(os.name == 'nt', 'Windows only')
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def test_windows_getnode_from_libuuid(self):
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self.check_has_stable_libuuid_extractable_node()
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script = 'import uuid; print(uuid._windll_getnode())'
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_, n_a, _ = assert_python_ok('-c', script)
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_, n_b, _ = assert_python_ok('-c', script)
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n_a, n_b = n_a.decode().strip(), n_b.decode().strip()
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self.assertTrue(n_a.isdigit())
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self.assertTrue(n_b.isdigit())
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self.assertEqual(n_a, n_b)
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class BaseTestInternals:
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_uuid = py_uuid
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@ -633,22 +633,24 @@ def _netstat_getnode():
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try:
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import _uuid
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_generate_time_safe = getattr(_uuid, "generate_time_safe", None)
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_has_stable_extractable_node = _uuid.has_stable_extractable_node
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_UuidCreate = getattr(_uuid, "UuidCreate", None)
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except ImportError:
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_uuid = None
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_generate_time_safe = None
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_has_stable_extractable_node = False
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_UuidCreate = None
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def _unix_getnode():
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"""Get the hardware address on Unix using the _uuid extension module."""
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if _generate_time_safe:
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if _generate_time_safe and _has_stable_extractable_node:
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uuid_time, _ = _generate_time_safe()
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return UUID(bytes=uuid_time).node
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def _windll_getnode():
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"""Get the hardware address on Windows using the _uuid extension module."""
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if _UuidCreate:
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if _UuidCreate and _has_stable_extractable_node:
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uuid_bytes = _UuidCreate()
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return UUID(bytes_le=uuid_bytes).node
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@ -78,23 +78,47 @@ py_UuidCreate(PyObject *Py_UNUSED(context),
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return NULL;
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}
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static int
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py_windows_has_stable_node(void)
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{
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UUID uuid;
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RPC_STATUS res;
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Py_BEGIN_ALLOW_THREADS
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res = UuidCreateSequential(&uuid);
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Py_END_ALLOW_THREADS
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return res == RPC_S_OK;
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}
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#endif /* MS_WINDOWS */
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static int
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uuid_exec(PyObject *module) {
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uuid_exec(PyObject *module)
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{
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#define ADD_INT(NAME, VALUE) \
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do { \
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if (PyModule_AddIntConstant(module, (NAME), (VALUE)) < 0) { \
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return -1; \
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} \
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} while (0)
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assert(sizeof(uuid_t) == 16);
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#if defined(MS_WINDOWS)
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int has_uuid_generate_time_safe = 0;
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ADD_INT("has_uuid_generate_time_safe", 0);
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#elif defined(HAVE_UUID_GENERATE_TIME_SAFE)
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int has_uuid_generate_time_safe = 1;
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ADD_INT("has_uuid_generate_time_safe", 1);
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#else
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int has_uuid_generate_time_safe = 0;
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ADD_INT("has_uuid_generate_time_safe", 0);
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#endif
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if (PyModule_AddIntConstant(module, "has_uuid_generate_time_safe",
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has_uuid_generate_time_safe) < 0) {
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return -1;
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}
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#if defined(MS_WINDOWS)
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ADD_INT("has_stable_extractable_node", py_windows_has_stable_node());
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#elif defined(HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC)
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ADD_INT("has_stable_extractable_node", 1);
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#else
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ADD_INT("has_stable_extractable_node", 0);
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#endif
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#undef ADD_INT
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return 0;
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}
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209
configure
generated
vendored
209
configure
generated
vendored
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@ -14052,6 +14052,7 @@ fi
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have_uuid=missing
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for ac_header in uuid.h
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@ -14061,6 +14062,7 @@ if test "x$ac_cv_header_uuid_h" = xyes
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then :
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printf "%s\n" "#define HAVE_UUID_H 1" >>confdefs.h
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for ac_func in uuid_create uuid_enc_be
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do :
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as_ac_var=`printf "%s\n" "ac_cv_func_$ac_func" | sed "$as_sed_sh"`
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@ -14070,7 +14072,9 @@ then :
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cat >>confdefs.h <<_ACEOF
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#define `printf "%s\n" "HAVE_$ac_func" | sed "$as_sed_cpp"` 1
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_ACEOF
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have_uuid=yes
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have_uuid=yes
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ac_cv_have_uuid_h=yes
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LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""}
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LIBUUID_LIBS=${LIBUUID_LIBS-""}
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@ -14160,6 +14164,7 @@ if test "x$ac_cv_header_uuid_uuid_h" = xyes
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then :
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printf "%s\n" "#define HAVE_UUID_UUID_H 1" >>confdefs.h
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ac_cv_have_uuid_uuid_h=yes
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py_check_lib_save_LIBS=$LIBS
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for uuid_generate_time in -luuid" >&5
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printf %s "checking for uuid_generate_time in -luuid... " >&6; }
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@ -14257,8 +14262,9 @@ fi
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printf "%s\n" "$ac_cv_lib_uuid_uuid_generate_time_safe" >&6; }
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if test "x$ac_cv_lib_uuid_uuid_generate_time_safe" = xyes
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then :
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have_uuid=yes
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printf "%s\n" "#define HAVE_UUID_GENERATE_TIME_SAFE 1" >>confdefs.h
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have_uuid=yes
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ac_cv_have_uuid_generate_time_safe=yes
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fi
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@ -14302,6 +14308,7 @@ if test "x$ac_cv_header_uuid_uuid_h" = xyes
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then :
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printf "%s\n" "#define HAVE_UUID_UUID_H 1" >>confdefs.h
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ac_cv_have_uuid_uuid_h=yes
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py_check_lib_save_LIBS=$LIBS
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for uuid_generate_time in -luuid" >&5
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printf %s "checking for uuid_generate_time in -luuid... " >&6; }
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@ -14399,8 +14406,9 @@ fi
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printf "%s\n" "$ac_cv_lib_uuid_uuid_generate_time_safe" >&6; }
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if test "x$ac_cv_lib_uuid_uuid_generate_time_safe" = xyes
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then :
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have_uuid=yes
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printf "%s\n" "#define HAVE_UUID_GENERATE_TIME_SAFE 1" >>confdefs.h
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have_uuid=yes
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ac_cv_have_uuid_generate_time_safe=yes
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fi
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@ -14431,10 +14439,16 @@ else
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
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printf "%s\n" "yes" >&6; }
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have_uuid=yes
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printf "%s\n" "#define HAVE_UUID_H 1" >>confdefs.h
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printf "%s\n" "#define HAVE_UUID_GENERATE_TIME_SAFE 1" >>confdefs.h
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ac_cv_have_uuid_generate_time_safe=yes
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# The uuid.h file to include may be <uuid.h> *or* <uuid/uuid.h>.
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# Since pkg-config --cflags uuid may return -I/usr/include/uuid,
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# it's possible to write '#include <uuid.h>' in _uuidmodule.c,
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# assuming that the compiler flags are properly updated.
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#
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# Ideally, we should have defined HAVE_UUID_H if and only if
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# #include <uuid.h> can be written, *without* assuming extra
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# include path.
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ac_cv_have_uuid_h=yes
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fi
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@ -14455,6 +14469,7 @@ if test "x$ac_cv_func_uuid_generate_time" = xyes
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then :
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have_uuid=yes
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ac_cv_have_uuid_uuid_h=yes
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LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""}
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LIBUUID_LIBS=${LIBUUID_LIBS-""}
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@ -14465,6 +14480,24 @@ fi
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done
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fi
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if test "x$ac_cv_have_uuid_h" = xyes
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then :
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printf "%s\n" "#define HAVE_UUID_H 1" >>confdefs.h
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fi
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if test "x$ac_cv_have_uuid_uuid_h" = xyes
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then :
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printf "%s\n" "#define HAVE_UUID_UUID_H 1" >>confdefs.h
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fi
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if test "x$ac_cv_have_uuid_generate_time_safe" = xyes
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then :
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printf "%s\n" "#define HAVE_UUID_GENERATE_TIME_SAFE 1" >>confdefs.h
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fi
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# gh-124228: While the libuuid library is available on NetBSD, it supports only UUID version 4.
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@ -14480,6 +14513,164 @@ then :
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have_uuid=no
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fi
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# gh-132710: The UUID node is fetched by using libuuid when possible
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# and cached. While the node is constant within the same process,
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# different interpreters may have different values as libuuid may
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# randomize the node value if the latter cannot be deduced.
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#
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# Consumers may define HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC
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# to indicate that libuuid is unstable and should not be relied
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# upon to deduce the MAC address.
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if test "$have_uuid" = "yes" -a "$HAVE_UUID_GENERATE_TIME_SAFE" = "1"
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then
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if uuid_generate_time_safe() node value is stable" >&5
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printf %s "checking if uuid_generate_time_safe() node value is stable... " >&6; }
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save_CFLAGS=$CFLAGS
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save_CPPFLAGS=$CPPFLAGS
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save_LDFLAGS=$LDFLAGS
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save_LIBS=$LIBS
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# Be sure to add the extra include path if we used pkg-config
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# as HAVE_UUID_H may be set even though <uuid.h> is only reachable
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# by adding extra -I flags.
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#
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# If the following script does not compile, we simply assume that
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# libuuid is missing.
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CFLAGS="$CFLAGS $LIBUUID_CFLAGS"
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LIBS="$LIBS $LIBUUID_LIBS"
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if test "$cross_compiling" = yes
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then :
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else case e in #(
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e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <inttypes.h> // PRIu64
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#include <stdint.h> // uint64_t
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#include <stdio.h> // fopen(), fclose()
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#ifdef HAVE_UUID_H
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#include <uuid.h>
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#else
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#include <uuid/uuid.h>
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#endif
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#define ERR 1
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int main(void) {
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uuid_t uuid; // unsigned char[16]
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(void)uuid_generate_time_safe(uuid);
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uint64_t node = 0;
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for (size_t i = 0; i < 6; i++) {
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node |= (uint64_t)uuid[15 - i] << (8 * i);
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}
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FILE *fp = fopen("conftest.out", "w");
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if (fp == NULL) {
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return ERR;
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}
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int rc = fprintf(fp, "%" PRIu64 "\n", node) >= 0;
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rc |= fclose(fp);
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return rc == 0 ? 0 : ERR;
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}
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_ACEOF
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if ac_fn_c_try_run "$LINENO"
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then :
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py_cv_uuid_node1=`cat conftest.out`
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
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esac
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fi
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CFLAGS=$save_CFLAGS
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CPPFLAGS=$save_CPPFLAGS
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LDFLAGS=$save_LDFLAGS
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LIBS=$save_LIBS
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save_CFLAGS=$CFLAGS
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save_CPPFLAGS=$CPPFLAGS
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save_LDFLAGS=$LDFLAGS
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save_LIBS=$LIBS
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# Be sure to add the extra include path if we used pkg-config
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# as HAVE_UUID_H may be set even though <uuid.h> is only reachable
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# by adding extra -I flags.
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#
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# If the following script does not compile, we simply assume that
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# libuuid is missing.
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CFLAGS="$CFLAGS $LIBUUID_CFLAGS"
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LIBS="$LIBS $LIBUUID_LIBS"
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if test "$cross_compiling" = yes
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then :
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else case e in #(
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e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <inttypes.h> // PRIu64
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#include <stdint.h> // uint64_t
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#include <stdio.h> // fopen(), fclose()
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#ifdef HAVE_UUID_H
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#include <uuid.h>
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#else
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#include <uuid/uuid.h>
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#endif
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#define ERR 1
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int main(void) {
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uuid_t uuid; // unsigned char[16]
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(void)uuid_generate_time_safe(uuid);
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uint64_t node = 0;
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for (size_t i = 0; i < 6; i++) {
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node |= (uint64_t)uuid[15 - i] << (8 * i);
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}
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FILE *fp = fopen("conftest.out", "w");
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if (fp == NULL) {
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return ERR;
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}
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int rc = fprintf(fp, "%" PRIu64 "\n", node) >= 0;
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rc |= fclose(fp);
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return rc == 0 ? 0 : ERR;
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}
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_ACEOF
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if ac_fn_c_try_run "$LINENO"
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then :
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py_cv_uuid_node2=`cat conftest.out`
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
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esac
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fi
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CFLAGS=$save_CFLAGS
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CPPFLAGS=$save_CPPFLAGS
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LDFLAGS=$save_LDFLAGS
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LIBS=$save_LIBS
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if test -n "$py_cv_uuid_node1" -a "$py_cv_uuid_node1" = "$py_cv_uuid_node2"
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then
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printf "%s\n" "#define HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC 1" >>confdefs.h
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: stable" >&5
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printf "%s\n" "stable" >&6; }
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else
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{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unstable" >&5
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printf "%s\n" "unstable" >&6; }
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fi
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fi
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# 'Real Time' functions on Solaris
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# posix4 on Solaris 2.6
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# pthread (first!) on Linux
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99
configure.ac
99
configure.ac
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@ -3740,15 +3740,17 @@ dnl check for uuid dependencies
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AH_TEMPLATE([HAVE_UUID_H], [Define to 1 if you have the <uuid.h> header file.])
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AH_TEMPLATE([HAVE_UUID_UUID_H], [Define to 1 if you have the <uuid/uuid.h> header file.])
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AH_TEMPLATE([HAVE_UUID_GENERATE_TIME_SAFE], [Define if uuid_generate_time_safe() exists.])
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AH_TEMPLATE([HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC], [Define if uuid_generate_time_safe() is able to deduce a MAC address.])
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have_uuid=missing
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dnl AIX provides support for RFC4122 (uuid) in libc.a starting with AIX 6.1
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dnl (anno 2007). FreeBSD and OpenBSD provides support in libc as well.
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dnl Little-endian FreeBSD, OpenBSD and NetBSD needs encoding into an octet
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dnl stream in big-endian byte-order
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AC_CHECK_HEADERS([uuid.h],
|
||||
[AC_CHECK_FUNCS([uuid_create uuid_enc_be],
|
||||
[have_uuid=yes
|
||||
AC_CHECK_HEADERS([uuid.h], [
|
||||
AC_CHECK_FUNCS([uuid_create uuid_enc_be], [
|
||||
have_uuid=yes
|
||||
ac_cv_have_uuid_h=yes
|
||||
LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""}
|
||||
LIBUUID_LIBS=${LIBUUID_LIBS-""}
|
||||
])
|
||||
|
|
@ -3758,19 +3760,29 @@ AS_VAR_IF([have_uuid], [missing], [
|
|||
PKG_CHECK_MODULES(
|
||||
[LIBUUID], [uuid >= 2.20],
|
||||
[dnl linux-util's libuuid has uuid_generate_time_safe() since v2.20 (2011)
|
||||
dnl and provides <uuid.h>.
|
||||
dnl and provides <uuid.h> assuming specific include paths are given
|
||||
have_uuid=yes
|
||||
AC_DEFINE([HAVE_UUID_H], [1])
|
||||
AC_DEFINE([HAVE_UUID_GENERATE_TIME_SAFE], [1])
|
||||
ac_cv_have_uuid_generate_time_safe=yes
|
||||
# The uuid.h file to include may be <uuid.h> *or* <uuid/uuid.h>.
|
||||
# Since pkg-config --cflags uuid may return -I/usr/include/uuid,
|
||||
# it's possible to write '#include <uuid.h>' in _uuidmodule.c,
|
||||
# assuming that the compiler flags are properly updated.
|
||||
#
|
||||
# Ideally, we should have defined HAVE_UUID_H if and only if
|
||||
# #include <uuid.h> can be written, *without* assuming extra
|
||||
# include path.
|
||||
ac_cv_have_uuid_h=yes
|
||||
], [
|
||||
WITH_SAVE_ENV([
|
||||
CPPFLAGS="$CPPFLAGS $LIBUUID_CFLAGS"
|
||||
LIBS="$LIBS $LIBUUID_LIBS"
|
||||
AC_CHECK_HEADERS([uuid/uuid.h], [
|
||||
ac_cv_have_uuid_uuid_h=yes
|
||||
PY_CHECK_LIB([uuid], [uuid_generate_time], [have_uuid=yes])
|
||||
PY_CHECK_LIB([uuid], [uuid_generate_time_safe],
|
||||
[have_uuid=yes
|
||||
AC_DEFINE([HAVE_UUID_GENERATE_TIME_SAFE], [1]) ]) ])
|
||||
PY_CHECK_LIB([uuid], [uuid_generate_time_safe], [
|
||||
have_uuid=yes
|
||||
ac_cv_have_uuid_generate_time_safe=yes
|
||||
])])
|
||||
AS_VAR_IF([have_uuid], [yes], [
|
||||
LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""}
|
||||
LIBUUID_LIBS=${LIBUUID_LIBS-"-luuid"}
|
||||
|
|
@ -3785,12 +3797,19 @@ AS_VAR_IF([have_uuid], [missing], [
|
|||
AC_CHECK_HEADERS([uuid/uuid.h], [
|
||||
AC_CHECK_FUNC([uuid_generate_time], [
|
||||
have_uuid=yes
|
||||
ac_cv_have_uuid_uuid_h=yes
|
||||
LIBUUID_CFLAGS=${LIBUUID_CFLAGS-""}
|
||||
LIBUUID_LIBS=${LIBUUID_LIBS-""}
|
||||
])
|
||||
])
|
||||
])
|
||||
|
||||
AS_VAR_IF([ac_cv_have_uuid_h], [yes], [AC_DEFINE([HAVE_UUID_H], [1])])
|
||||
AS_VAR_IF([ac_cv_have_uuid_uuid_h], [yes], [AC_DEFINE([HAVE_UUID_UUID_H], [1])])
|
||||
AS_VAR_IF([ac_cv_have_uuid_generate_time_safe], [yes], [
|
||||
AC_DEFINE([HAVE_UUID_GENERATE_TIME_SAFE], [1])
|
||||
])
|
||||
|
||||
# gh-124228: While the libuuid library is available on NetBSD, it supports only UUID version 4.
|
||||
# This restriction inhibits the proper generation of time-based UUIDs.
|
||||
if test "$ac_sys_system" = "NetBSD"; then
|
||||
|
|
@ -3800,6 +3819,68 @@ fi
|
|||
|
||||
AS_VAR_IF([have_uuid], [missing], [have_uuid=no])
|
||||
|
||||
# gh-132710: The UUID node is fetched by using libuuid when possible
|
||||
# and cached. While the node is constant within the same process,
|
||||
# different interpreters may have different values as libuuid may
|
||||
# randomize the node value if the latter cannot be deduced.
|
||||
#
|
||||
# Consumers may define HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC
|
||||
# to indicate that libuuid is unstable and should not be relied
|
||||
# upon to deduce the MAC address.
|
||||
AC_DEFUN([PY_EXTRACT_UUID_GENERATE_TIME_SAFE_MAC], [WITH_SAVE_ENV([
|
||||
# Be sure to add the extra include path if we used pkg-config
|
||||
# as HAVE_UUID_H may be set even though <uuid.h> is only reachable
|
||||
# by adding extra -I flags.
|
||||
#
|
||||
# If the following script does not compile, we simply assume that
|
||||
# libuuid is missing.
|
||||
CFLAGS="$CFLAGS $LIBUUID_CFLAGS"
|
||||
LIBS="$LIBS $LIBUUID_LIBS"
|
||||
AC_RUN_IFELSE([AC_LANG_SOURCE([[
|
||||
#include <inttypes.h> // PRIu64
|
||||
#include <stdint.h> // uint64_t
|
||||
#include <stdio.h> // fopen(), fclose()
|
||||
|
||||
#ifdef HAVE_UUID_H
|
||||
#include <uuid.h>
|
||||
#else
|
||||
#include <uuid/uuid.h>
|
||||
#endif
|
||||
|
||||
#define ERR 1
|
||||
int main(void) {
|
||||
uuid_t uuid; // unsigned char[16]
|
||||
(void)uuid_generate_time_safe(uuid);
|
||||
uint64_t node = 0;
|
||||
for (size_t i = 0; i < 6; i++) {
|
||||
node |= (uint64_t)uuid[15 - i] << (8 * i);
|
||||
}
|
||||
FILE *fp = fopen("conftest.out", "w");
|
||||
if (fp == NULL) {
|
||||
return ERR;
|
||||
}
|
||||
int rc = fprintf(fp, "%" PRIu64 "\n", node) >= 0;
|
||||
rc |= fclose(fp);
|
||||
return rc == 0 ? 0 : ERR;
|
||||
}]])], [
|
||||
AS_VAR_SET([$1], [`cat conftest.out`])
|
||||
], [], []
|
||||
)])])
|
||||
|
||||
if test "$have_uuid" = "yes" -a "$HAVE_UUID_GENERATE_TIME_SAFE" = "1"
|
||||
then
|
||||
AC_MSG_CHECKING([if uuid_generate_time_safe() node value is stable])
|
||||
PY_EXTRACT_UUID_GENERATE_TIME_SAFE_MAC([py_cv_uuid_node1])
|
||||
PY_EXTRACT_UUID_GENERATE_TIME_SAFE_MAC([py_cv_uuid_node2])
|
||||
if test -n "$py_cv_uuid_node1" -a "$py_cv_uuid_node1" = "$py_cv_uuid_node2"
|
||||
then
|
||||
AC_DEFINE([HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC], [1])
|
||||
AC_MSG_RESULT([stable])
|
||||
else
|
||||
AC_MSG_RESULT([unstable])
|
||||
fi
|
||||
fi
|
||||
|
||||
# 'Real Time' functions on Solaris
|
||||
# posix4 on Solaris 2.6
|
||||
# pthread (first!) on Linux
|
||||
|
|
|
|||
|
|
@ -1584,6 +1584,9 @@
|
|||
/* Define if uuid_generate_time_safe() exists. */
|
||||
#undef HAVE_UUID_GENERATE_TIME_SAFE
|
||||
|
||||
/* Define if uuid_generate_time_safe() is able to deduce a MAC address. */
|
||||
#undef HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC
|
||||
|
||||
/* Define to 1 if you have the <uuid.h> header file. */
|
||||
#undef HAVE_UUID_H
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue