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gnu: python@3: Update to 3.6.3.

Browse source 
* gnu/packages/patches/python-3.5-fix-tests.patch: Rename to ...
* gnu/packages/patches/python-3-fix-tests.patch: ... this. Adjust and disable
more tests.
* gnu/packages/patches/python-3.5-getentropy-on-old-kernels.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/python.scm (python-2.7)[argument]: Patch '/bin/sh' in one more file.
(python-3.5): Rename to ...
(python-3.6): ... this. Update to 3.6.3.
[source](patches): Remove obsolete patch, adjust to patch rename.
(python-3): Use PYTHON-3.6.
This commit is contained in:
Marius Bakke 2017-07-30 18:13:33 +02:00
parent 603a64920f
commit b18226c3a1
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GPG key ID: A2A06DF2A33A54FA
5 changed files with 156 additions and 797 deletions
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3
gnu/local.mk
View file

@ -971,8 +971,7 @@ dist_patch_DATA = \
%D%/packages/patches/python-2.7-source-date-epoch.patch \
%D%/packages/patches/python-3-deterministic-build-info.patch \
%D%/packages/patches/python-3-search-paths.patch \
%D%/packages/patches/python-3.5-fix-tests.patch \
%D%/packages/patches/python-3.5-getentropy-on-old-kernels.patch \
%D%/packages/patches/python-3-fix-tests.patch \
%D%/packages/patches/python-dendropy-fix-tests.patch \
%D%/packages/patches/python-fix-tests.patch \
%D%/packages/patches/python-genshi-add-support-for-python-3.4-AST.patch \

149
gnu/packages/patches/python-3-fix-tests.patch Normal file
View file

@ -0,0 +1,149 @@
Additional test fixes which affect Python 3.5 (and presumably later) but not
prior revisions of Python.
--- Lib/test/test_pathlib.py 2014-03-01 03:02:36.088311000 +0100
+++ Lib/test/test_pathlib.py 2014-03-01 04:56:37.768311000 +0100
@@ -2132,8 +2132,7 @@
self.assertEqual(given, expect)
self.assertEqual(set(p.rglob("FILEd*")), set())
- @unittest.skipUnless(hasattr(pwd, 'getpwall'),
- 'pwd module does not expose getpwall()')
+ @unittest.skipIf(True, "Guix builder home is '/' which causes trouble for these tests")
def test_expanduser(self):
P = self.cls
support.import_module('pwd')
--- Lib/test/test_tarfile.py 2016-02-24 19:22:52.597208055 +0000
+++ Lib/test/test_tarfile.py 2016-02-24 20:50:48.941950135 +0000
@@ -2305,11 +2305,14 @@
try:
import pwd, grp
except ImportError:
return False
- if pwd.getpwuid(0)[0] != 'root':
- return False
- if grp.getgrgid(0)[0] != 'root':
+ try:
+ if pwd.getpwuid(0)[0] != 'root':
+ return False
+ if grp.getgrgid(0)[0] != 'root':
+ return False
+ except KeyError:
return False
return True
--- Lib/test/test_asyncio/test_base_events.py
+++ Lib/test/test_asyncio/test_base_events.py
@@ -1216,6 +1216,8 @@
self._test_create_connection_ip_addr(m_socket, False)
@patch_socket
+ @unittest.skipUnless(support.is_resource_enabled('network'),
+ 'network is not enabled')
def test_create_connection_service_name(self, m_socket):
m_socket.getaddrinfo = socket.getaddrinfo
sock = m_socket.socket.return_value
--- Lib/test/test_pdb.py.org 2017-03-12 03:09:01.991856701 +0100
+++ Lib/test/test_pdb.py 2017-03-12 03:26:17.742572869 +0100
For some reason, KeyboardInterrupts do not work in the build
environment (lack of controlling TTY?). Just change the expected
outcome. Unfortunately, this will make it fail for users running
`python -m test test_pdb test_pdb` interactively.
@@ -928,11 +928,11 @@
> <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
-> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
(Pdb) continue
- pdb 1: <built-in function default_int_handler>
+ pdb 1: Handlers.SIG_IGN
> <doctest test.test_pdb.test_pdb_issue_20766[0]>(5)test_function()
-> sess.set_trace(sys._getframe())
(Pdb) continue
- pdb 2: <built-in function default_int_handler>
+ pdb 2: Handlers.SIG_IGN
"""
class PdbTestCase(unittest.TestCase):
--- Lib/test/test_socket.py
+++ Lib/test/test_socket.py
@@ -802,6 +802,8 @@
if not fqhn in all_host_names:
self.fail("Error testing host resolution mechanisms. (fqdn: %s, all: %s)" % (fqhn, repr(all_host_names)))
+ @unittest.skipUnless(support.is_resource_enabled('network'),
+ 'network is not enabled')
def test_host_resolution(self):
for addr in [support.HOST, '10.0.0.1', '255.255.255.255']:
self.assertEqual(socket.gethostbyname(addr), addr)
--- Lib/test/test_spwd.py
+++ Lib/test/test_spwd.py
@@ -5,8 +5,7 @@
spwd = support.import_module('spwd')
-@unittest.skipUnless(hasattr(os, 'geteuid') and os.geteuid() == 0,
- 'root privileges required')
+@unittest.skipUnless(os.path.exists("/etc/shadow"), 'spwd tests require /etc/shadow')
class TestSpwdRoot(unittest.TestCase):
def test_getspall(self):
@@ -56,8 +55,7 @@
self.assertRaises(TypeError, spwd.getspnam, bytes_name)
-@unittest.skipUnless(hasattr(os, 'geteuid') and os.geteuid() != 0,
- 'non-root user required')
+@unittest.skipUnless(os.path.exists("/etc/shadow"), 'spwd tests require /etc/shadow')
class TestSpwdNonRoot(unittest.TestCase):
def test_getspnam_exception(self):
--- Lib/test/test_regrtest.py
+++ Lib/test/test_regrtest.py
@@ -700,6 +700,7 @@
output = self.run_tests('--fromfile', filename)
self.check_executed_tests(output, tests)
+ @unittest.skipIf(True, 'Keyboard interrupts do not work in the Guix build environment.')
def test_interrupted(self):
code = TEST_INTERRUPTED
test = self.create_test('sigint', code=code)
@@ -717,6 +718,7 @@
% (self.TESTNAME_REGEX, len(tests)))
self.check_line(output, regex)
+ @unittest.skipIf(True, 'Keyboard interrupts do not work in the Guix build environment.')
def test_slow_interrupted(self):
# Issue #25373: test --slowest with an interrupted test
code = TEST_INTERRUPTED
--- Lib/test/test_generators.py
+++ Lib/test/test_generators.py
@@ -29,6 +29,7 @@
else:
return "FAILED"
+ @unittest.skipIf(True, 'Keyboard interrupts do not work in the Guix build environment')
def test_raise_and_yield_from(self):
gen = self.generator1()
gen.send(None)
--- Lib/test/test_normalization.py
+++ Lib/test/test_normalization.py
@@ -2,6 +2,7 @@
import unittest
from http.client import HTTPException
+from urllib.error import URLError
import sys
from unicodedata import normalize, unidata_version
@@ -43,6 +44,8 @@
except PermissionError:
self.skipTest(f"Permission error when downloading {TESTDATAURL} "
f"into the test data directory")
+ except URLError:
+ self.skipTest("DNS lookups are not enabled.")
except (OSError, HTTPException):
self.fail(f"Could not retrieve {TESTDATAURL}")

69
gnu/packages/patches/python-3.5-fix-tests.patch
View file

@ -1,69 +0,0 @@
Additional test fixes which affect Python 3.5 (and presumably later) but not
prior revisions of Python.
--- Lib/test/test_pathlib.py 2014-03-01 03:02:36.088311000 +0100
+++ Lib/test/test_pathlib.py 2014-03-01 04:56:37.768311000 +0100
@@ -1986,8 +1986,9 @@
expect = set() if not support.fs_is_case_insensitive(BASE) else given
self.assertEqual(given, expect)
self.assertEqual(set(p.rglob("FILEd*")), set())
+ @unittest.skipIf(True, "Guix builder home is '/' which causes trouble for these tests")
def test_expanduser(self):
P = self.cls
support.import_module('pwd')
import pwd
--- Lib/test/test_tarfile.py 2016-02-24 19:22:52.597208055 +0000
+++ Lib/test/test_tarfile.py 2016-02-24 20:50:48.941950135 +0000
@@ -2305,11 +2305,14 @@
try:
import pwd, grp
except ImportError:
return False
- if pwd.getpwuid(0)[0] != 'root':
- return False
- if grp.getgrgid(0)[0] != 'root':
+ try:
+ if pwd.getpwuid(0)[0] != 'root':
+ return False
+ if grp.getgrgid(0)[0] != 'root':
+ return False
+ except KeyError:
return False
return True
--- Lib/test/test_asyncio/test_base_events.py
+++ Lib/test/test_asyncio/test_base_events.py
@@ -1216,6 +1216,8 @@
self._test_create_connection_ip_addr(m_socket, False)
@patch_socket
+ @unittest.skipUnless(support.is_resource_enabled('network'),
+ 'network is not enabled')
def test_create_connection_service_name(self, m_socket):
m_socket.getaddrinfo = socket.getaddrinfo
sock = m_socket.socket.return_value
--- Lib/test/test_pdb.py.org 2017-03-12 03:09:01.991856701 +0100
+++ Lib/test/test_pdb.py 2017-03-12 03:26:17.742572869 +0100
For some reason, KeyboardInterrupts do not work in the build
environment (lack of controlling TTY?). Just change the expected
outcome. Unfortunately, this will make it fail for users running
`python -m test test_pdb test_pdb` interactively.
@@ -928,11 +928,11 @@
> <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
-> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
(Pdb) continue
- pdb 1: <built-in function default_int_handler>
+ pdb 1: Handlers.SIG_IGN
> <doctest test.test_pdb.test_pdb_issue_20766[0]>(5)test_function()
-> sess.set_trace(sys._getframe())
(Pdb) continue
- pdb 2: <built-in function default_int_handler>
+ pdb 2: Handlers.SIG_IGN
"""
class PdbTestCase(unittest.TestCase):

720
gnu/packages/patches/python-3.5-getentropy-on-old-kernels.patch
View file

@ -1,720 +0,0 @@
This patch resolves a compatibility issue when compiled against glibc 2.25
and run runder kernels < 3.17:
https://bugzilla.redhat.com/show_bug.cgi?id=1410175
Upstream bug URL: https://bugs.python.org/issue29157
Patch copied from upstream source repository:
https://hg.python.org/cpython/rev/8125d9a8152b
# HG changeset patch
# User Victor Stinner <victor.stinner@gmail.com>
# Date 1483957133 -3600
# Node ID 8125d9a8152b79e712cb09c7094b9129b9bcea86
# Parent 337461574c90281630751b6095c4e1baf380cf7d
Issue #29157: Prefer getrandom() over getentropy()
Copy and then adapt Python/random.c from default branch. Difference between 3.5
and default branches:
* Python 3.5 only uses getrandom() in non-blocking mode: flags=GRND_NONBLOCK
* If getrandom() fails with EAGAIN: py_getrandom() immediately fails and
remembers that getrandom() doesn't work.
* Python 3.5 has no _PyOS_URandomNonblock() function: _PyOS_URandom()
works in non-blocking mode on Python 3.5
diff --git a/Python/random.c b/Python/random.c
--- Python/random.c
+++ Python/random.c
@@ -1,6 +1,9 @@
#include "Python.h"
#ifdef MS_WINDOWS
# include <windows.h>
+/* All sample MSDN wincrypt programs include the header below. It is at least
+ * required with Min GW. */
+# include <wincrypt.h>
#else
# include <fcntl.h>
# ifdef HAVE_SYS_STAT_H
@@ -37,10 +40,9 @@ win32_urandom_init(int raise)
return 0;
error:
- if (raise)
+ if (raise) {
PyErr_SetFromWindowsErr(0);
- else
- Py_FatalError("Failed to initialize Windows random API (CryptoGen)");
+ }
return -1;
}
@@ -53,8 +55,9 @@ win32_urandom(unsigned char *buffer, Py_
if (hCryptProv == 0)
{
- if (win32_urandom_init(raise) == -1)
+ if (win32_urandom_init(raise) == -1) {
return -1;
+ }
}
while (size > 0)
@@ -63,11 +66,9 @@ win32_urandom(unsigned char *buffer, Py_
if (!CryptGenRandom(hCryptProv, (DWORD)chunk, buffer))
{
/* CryptGenRandom() failed */
- if (raise)
+ if (raise) {
PyErr_SetFromWindowsErr(0);
- else
- Py_FatalError("Failed to initialized the randomized hash "
- "secret using CryptoGen)");
+ }
return -1;
}
buffer += chunk;
@@ -76,58 +77,23 @@ win32_urandom(unsigned char *buffer, Py_
return 0;
}
-/* Issue #25003: Don't use getentropy() on Solaris (available since
- * Solaris 11.3), it is blocking whereas os.urandom() should not block. */
-#elif defined(HAVE_GETENTROPY) && !defined(sun)
-#define PY_GETENTROPY 1
-
-/* Fill buffer with size pseudo-random bytes generated by getentropy().
- Return 0 on success, or raise an exception and return -1 on error.
-
- If fatal is nonzero, call Py_FatalError() instead of raising an exception
- on error. */
-static int
-py_getentropy(unsigned char *buffer, Py_ssize_t size, int fatal)
-{
- while (size > 0) {
- Py_ssize_t len = Py_MIN(size, 256);
- int res;
-
- if (!fatal) {
- Py_BEGIN_ALLOW_THREADS
- res = getentropy(buffer, len);
- Py_END_ALLOW_THREADS
-
- if (res < 0) {
- PyErr_SetFromErrno(PyExc_OSError);
- return -1;
- }
- }
- else {
- res = getentropy(buffer, len);
- if (res < 0)
- Py_FatalError("getentropy() failed");
- }
-
- buffer += len;
- size -= len;
- }
- return 0;
-}
-
-#else
+#else /* !MS_WINDOWS */
#if defined(HAVE_GETRANDOM) || defined(HAVE_GETRANDOM_SYSCALL)
#define PY_GETRANDOM 1
-/* Call getrandom()
+/* Call getrandom() to get random bytes:
+
- Return 1 on success
- - Return 0 if getrandom() syscall is not available (failed with ENOSYS or
- EPERM) or if getrandom(GRND_NONBLOCK) failed with EAGAIN (system urandom
- not initialized yet) and raise=0.
+ - Return 0 if getrandom() is not available (failed with ENOSYS or EPERM),
+ or if getrandom(GRND_NONBLOCK) failed with EAGAIN (system urandom not
+ initialized yet).
- Raise an exception (if raise is non-zero) and return -1 on error:
- getrandom() failed with EINTR and the Python signal handler raised an
- exception, or getrandom() failed with a different error. */
+ if getrandom() failed with EINTR, raise is non-zero and the Python signal
+ handler raised an exception, or if getrandom() failed with a different
+ error.
+
+ getrandom() is retried if it failed with EINTR: interrupted by a signal. */
static int
py_getrandom(void *buffer, Py_ssize_t size, int raise)
{
@@ -142,16 +108,19 @@ py_getrandom(void *buffer, Py_ssize_t si
* see https://bugs.python.org/issue26839. To avoid this, use the
* GRND_NONBLOCK flag. */
const int flags = GRND_NONBLOCK;
+ char *dest;
long n;
if (!getrandom_works) {
return 0;
}
+ dest = buffer;
while (0 < size) {
#ifdef sun
/* Issue #26735: On Solaris, getrandom() is limited to returning up
- to 1024 bytes */
+ to 1024 bytes. Call it multiple times if more bytes are
+ requested. */
n = Py_MIN(size, 1024);
#else
n = Py_MIN(size, LONG_MAX);
@@ -161,34 +130,35 @@ py_getrandom(void *buffer, Py_ssize_t si
#ifdef HAVE_GETRANDOM
if (raise) {
Py_BEGIN_ALLOW_THREADS
- n = getrandom(buffer, n, flags);
+ n = getrandom(dest, n, flags);
Py_END_ALLOW_THREADS
}
else {
- n = getrandom(buffer, n, flags);
+ n = getrandom(dest, n, flags);
}
#else
/* On Linux, use the syscall() function because the GNU libc doesn't
- * expose the Linux getrandom() syscall yet. See:
- * https://sourceware.org/bugzilla/show_bug.cgi?id=17252 */
+ expose the Linux getrandom() syscall yet. See:
+ https://sourceware.org/bugzilla/show_bug.cgi?id=17252 */
if (raise) {
Py_BEGIN_ALLOW_THREADS
- n = syscall(SYS_getrandom, buffer, n, flags);
+ n = syscall(SYS_getrandom, dest, n, flags);
Py_END_ALLOW_THREADS
}
else {
- n = syscall(SYS_getrandom, buffer, n, flags);
+ n = syscall(SYS_getrandom, dest, n, flags);
}
#endif
if (n < 0) {
- /* ENOSYS: getrandom() syscall not supported by the kernel (but
- * maybe supported by the host which built Python). EPERM:
- * getrandom() syscall blocked by SECCOMP or something else. */
+ /* ENOSYS: the syscall is not supported by the kernel.
+ EPERM: the syscall is blocked by a security policy (ex: SECCOMP)
+ or something else. */
if (errno == ENOSYS || errno == EPERM) {
getrandom_works = 0;
return 0;
}
+
if (errno == EAGAIN) {
/* getrandom(GRND_NONBLOCK) fails with EAGAIN if the system
urandom is not initialiazed yet. In this case, fall back on
@@ -202,32 +172,101 @@ py_getrandom(void *buffer, Py_ssize_t si
}
if (errno == EINTR) {
- if (PyErr_CheckSignals()) {
- if (!raise) {
- Py_FatalError("getrandom() interrupted by a signal");
+ if (raise) {
+ if (PyErr_CheckSignals()) {
+ return -1;
}
- return -1;
}
- /* retry getrandom() */
+ /* retry getrandom() if it was interrupted by a signal */
continue;
}
if (raise) {
PyErr_SetFromErrno(PyExc_OSError);
}
- else {
- Py_FatalError("getrandom() failed");
+ return -1;
+ }
+
+ dest += n;
+ size -= n;
+ }
+ return 1;
+}
+
+#elif defined(HAVE_GETENTROPY)
+#define PY_GETENTROPY 1
+
+/* Fill buffer with size pseudo-random bytes generated by getentropy():
+
+ - Return 1 on success
+ - Return 0 if getentropy() syscall is not available (failed with ENOSYS or
+ EPERM).
+ - Raise an exception (if raise is non-zero) and return -1 on error:
+ if getentropy() failed with EINTR, raise is non-zero and the Python signal
+ handler raised an exception, or if getentropy() failed with a different
+ error.
+
+ getentropy() is retried if it failed with EINTR: interrupted by a signal. */
+static int
+py_getentropy(char *buffer, Py_ssize_t size, int raise)
+{
+ /* Is getentropy() supported by the running kernel? Set to 0 if
+ getentropy() failed with ENOSYS or EPERM. */
+ static int getentropy_works = 1;
+
+ if (!getentropy_works) {
+ return 0;
+ }
+
+ while (size > 0) {
+ /* getentropy() is limited to returning up to 256 bytes. Call it
+ multiple times if more bytes are requested. */
+ Py_ssize_t len = Py_MIN(size, 256);
+ int res;
+
+ if (raise) {
+ Py_BEGIN_ALLOW_THREADS
+ res = getentropy(buffer, len);
+ Py_END_ALLOW_THREADS
+ }
+ else {
+ res = getentropy(buffer, len);
+ }
+
+ if (res < 0) {
+ /* ENOSYS: the syscall is not supported by the running kernel.
+ EPERM: the syscall is blocked by a security policy (ex: SECCOMP)
+ or something else. */
+ if (errno == ENOSYS || errno == EPERM) {
+ getentropy_works = 0;
+ return 0;
+ }
+
+ if (errno == EINTR) {
+ if (raise) {
+ if (PyErr_CheckSignals()) {
+ return -1;
+ }
+ }
+
+ /* retry getentropy() if it was interrupted by a signal */
+ continue;
+ }
+
+ if (raise) {
+ PyErr_SetFromErrno(PyExc_OSError);
}
return -1;
}
- buffer += n;
- size -= n;
+ buffer += len;
+ size -= len;
}
return 1;
}
-#endif
+#endif /* defined(HAVE_GETENTROPY) && !defined(sun) */
+
static struct {
int fd;
@@ -235,136 +274,123 @@ static struct {
ino_t st_ino;
} urandom_cache = { -1 };
+/* Read random bytes from the /dev/urandom device:
-/* Read 'size' random bytes from py_getrandom(). Fall back on reading from
- /dev/urandom if getrandom() is not available.
+ - Return 0 on success
+ - Raise an exception (if raise is non-zero) and return -1 on error
- Call Py_FatalError() on error. */
-static void
-dev_urandom_noraise(unsigned char *buffer, Py_ssize_t size)
+ Possible causes of errors:
+
+ - open() failed with ENOENT, ENXIO, ENODEV, EACCES: the /dev/urandom device
+ was not found. For example, it was removed manually or not exposed in a
+ chroot or container.
+ - open() failed with a different error
+ - fstat() failed
+ - read() failed or returned 0
+
+ read() is retried if it failed with EINTR: interrupted by a signal.
+
+ The file descriptor of the device is kept open between calls to avoid using
+ many file descriptors when run in parallel from multiple threads:
+ see the issue #18756.
+
+ st_dev and st_ino fields of the file descriptor (from fstat()) are cached to
+ check if the file descriptor was replaced by a different file (which is
+ likely a bug in the application): see the issue #21207.
+
+ If the file descriptor was closed or replaced, open a new file descriptor
+ but don't close the old file descriptor: it probably points to something
+ important for some third-party code. */
+static int
+dev_urandom(char *buffer, Py_ssize_t size, int raise)
{
int fd;
Py_ssize_t n;
- assert (0 < size);
+ if (raise) {
+ struct _Py_stat_struct st;
-#ifdef PY_GETRANDOM
- if (py_getrandom(buffer, size, 0) == 1) {
- return;
+ if (urandom_cache.fd >= 0) {
+ /* Does the fd point to the same thing as before? (issue #21207) */
+ if (_Py_fstat_noraise(urandom_cache.fd, &st)
+ || st.st_dev != urandom_cache.st_dev
+ || st.st_ino != urandom_cache.st_ino) {
+ /* Something changed: forget the cached fd (but don't close it,
+ since it probably points to something important for some
+ third-party code). */
+ urandom_cache.fd = -1;
+ }
+ }
+ if (urandom_cache.fd >= 0)
+ fd = urandom_cache.fd;
+ else {
+ fd = _Py_open("/dev/urandom", O_RDONLY);
+ if (fd < 0) {
+ if (errno == ENOENT || errno == ENXIO ||
+ errno == ENODEV || errno == EACCES) {
+ PyErr_SetString(PyExc_NotImplementedError,
+ "/dev/urandom (or equivalent) not found");
+ }
+ /* otherwise, keep the OSError exception raised by _Py_open() */
+ return -1;
+ }
+ if (urandom_cache.fd >= 0) {
+ /* urandom_fd was initialized by another thread while we were
+ not holding the GIL, keep it. */
+ close(fd);
+ fd = urandom_cache.fd;
+ }
+ else {
+ if (_Py_fstat(fd, &st)) {
+ close(fd);
+ return -1;
+ }
+ else {
+ urandom_cache.fd = fd;
+ urandom_cache.st_dev = st.st_dev;
+ urandom_cache.st_ino = st.st_ino;
+ }
+ }
+ }
+
+ do {
+ n = _Py_read(fd, buffer, (size_t)size);
+ if (n == -1)
+ return -1;
+ if (n == 0) {
+ PyErr_Format(PyExc_RuntimeError,
+ "Failed to read %zi bytes from /dev/urandom",
+ size);
+ return -1;
+ }
+
+ buffer += n;
+ size -= n;
+ } while (0 < size);
}
- /* getrandom() failed with ENOSYS or EPERM,
- fall back on reading /dev/urandom */
-#endif
-
- fd = _Py_open_noraise("/dev/urandom", O_RDONLY);
- if (fd < 0) {
- Py_FatalError("Failed to open /dev/urandom");
- }
-
- while (0 < size)
- {
- do {
- n = read(fd, buffer, (size_t)size);
- } while (n < 0 && errno == EINTR);
-
- if (n <= 0) {
- /* read() failed or returned 0 bytes */
- Py_FatalError("Failed to read bytes from /dev/urandom");
- break;
- }
- buffer += n;
- size -= n;
- }
- close(fd);
-}
-
-/* Read 'size' random bytes from py_getrandom(). Fall back on reading from
- /dev/urandom if getrandom() is not available.
-
- Return 0 on success. Raise an exception and return -1 on error. */
-static int
-dev_urandom_python(char *buffer, Py_ssize_t size)
-{
- int fd;
- Py_ssize_t n;
- struct _Py_stat_struct st;
-#ifdef PY_GETRANDOM
- int res;
-#endif
-
- if (size <= 0)
- return 0;
-
-#ifdef PY_GETRANDOM
- res = py_getrandom(buffer, size, 1);
- if (res < 0) {
- return -1;
- }
- if (res == 1) {
- return 0;
- }
- /* getrandom() failed with ENOSYS or EPERM,
- fall back on reading /dev/urandom */
-#endif
-
- if (urandom_cache.fd >= 0) {
- /* Does the fd point to the same thing as before? (issue #21207) */
- if (_Py_fstat_noraise(urandom_cache.fd, &st)
- || st.st_dev != urandom_cache.st_dev
- || st.st_ino != urandom_cache.st_ino) {
- /* Something changed: forget the cached fd (but don't close it,
- since it probably points to something important for some
- third-party code). */
- urandom_cache.fd = -1;
- }
- }
- if (urandom_cache.fd >= 0)
- fd = urandom_cache.fd;
else {
- fd = _Py_open("/dev/urandom", O_RDONLY);
+ fd = _Py_open_noraise("/dev/urandom", O_RDONLY);
if (fd < 0) {
- if (errno == ENOENT || errno == ENXIO ||
- errno == ENODEV || errno == EACCES)
- PyErr_SetString(PyExc_NotImplementedError,
- "/dev/urandom (or equivalent) not found");
- /* otherwise, keep the OSError exception raised by _Py_open() */
return -1;
}
- if (urandom_cache.fd >= 0) {
- /* urandom_fd was initialized by another thread while we were
- not holding the GIL, keep it. */
- close(fd);
- fd = urandom_cache.fd;
- }
- else {
- if (_Py_fstat(fd, &st)) {
+
+ while (0 < size)
+ {
+ do {
+ n = read(fd, buffer, (size_t)size);
+ } while (n < 0 && errno == EINTR);
+
+ if (n <= 0) {
+ /* stop on error or if read(size) returned 0 */
close(fd);
return -1;
}
- else {
- urandom_cache.fd = fd;
- urandom_cache.st_dev = st.st_dev;
- urandom_cache.st_ino = st.st_ino;
- }
+
+ buffer += n;
+ size -= n;
}
+ close(fd);
}
-
- do {
- n = _Py_read(fd, buffer, (size_t)size);
- if (n == -1) {
- return -1;
- }
- if (n == 0) {
- PyErr_Format(PyExc_RuntimeError,
- "Failed to read %zi bytes from /dev/urandom",
- size);
- return -1;
- }
-
- buffer += n;
- size -= n;
- } while (0 < size);
-
return 0;
}
@@ -376,8 +402,8 @@ dev_urandom_close(void)
urandom_cache.fd = -1;
}
}
+#endif /* !MS_WINDOWS */
-#endif
/* Fill buffer with pseudo-random bytes generated by a linear congruent
generator (LCG):
@@ -400,29 +426,98 @@ lcg_urandom(unsigned int x0, unsigned ch
}
}
+/* Read random bytes:
+
+ - Return 0 on success
+ - Raise an exception (if raise is non-zero) and return -1 on error
+
+ Used sources of entropy ordered by preference, preferred source first:
+
+ - CryptGenRandom() on Windows
+ - getrandom() function (ex: Linux and Solaris): call py_getrandom()
+ - getentropy() function (ex: OpenBSD): call py_getentropy()
+ - /dev/urandom device
+
+ Read from the /dev/urandom device if getrandom() or getentropy() function
+ is not available or does not work.
+
+ Prefer getrandom() over getentropy() because getrandom() supports blocking
+ and non-blocking mode and Python requires non-blocking RNG at startup to
+ initialize its hash secret: see the PEP 524.
+
+ Prefer getrandom() and getentropy() over reading directly /dev/urandom
+ because these functions don't need file descriptors and so avoid ENFILE or
+ EMFILE errors (too many open files): see the issue #18756.
+
+ Only use RNG running in the kernel. They are more secure because it is
+ harder to get the internal state of a RNG running in the kernel land than a
+ RNG running in the user land. The kernel has a direct access to the hardware
+ and has access to hardware RNG, they are used as entropy sources.
+
+ Note: the OpenSSL RAND_pseudo_bytes() function does not automatically reseed
+ its RNG on fork(), two child processes (with the same pid) generate the same
+ random numbers: see issue #18747. Kernel RNGs don't have this issue,
+ they have access to good quality entropy sources.
+
+ If raise is zero:
+
+ - Don't raise an exception on error
+ - Don't call the Python signal handler (don't call PyErr_CheckSignals()) if
+ a function fails with EINTR: retry directly the interrupted function
+ - Don't release the GIL to call functions.
+*/
+static int
+pyurandom(void *buffer, Py_ssize_t size, int raise)
+{
+#if defined(PY_GETRANDOM) || defined(PY_GETENTROPY)
+ int res;
+#endif
+
+ if (size < 0) {
+ if (raise) {
+ PyErr_Format(PyExc_ValueError,
+ "negative argument not allowed");
+ }
+ return -1;
+ }
+
+ if (size == 0) {
+ return 0;
+ }
+
+#ifdef MS_WINDOWS
+ return win32_urandom((unsigned char *)buffer, size, raise);
+#else
+
+#if defined(PY_GETRANDOM) || defined(PY_GETENTROPY)
+#ifdef PY_GETRANDOM
+ res = py_getrandom(buffer, size, raise);
+#else
+ res = py_getentropy(buffer, size, raise);
+#endif
+ if (res < 0) {
+ return -1;
+ }
+ if (res == 1) {
+ return 0;
+ }
+ /* getrandom() or getentropy() function is not available: failed with
+ ENOSYS, EPERM or EAGAIN. Fall back on reading from /dev/urandom. */
+#endif
+
+ return dev_urandom(buffer, size, raise);
+#endif
+}
+
/* Fill buffer with size pseudo-random bytes from the operating system random
number generator (RNG). It is suitable for most cryptographic purposes
except long living private keys for asymmetric encryption.
- Return 0 on success, raise an exception and return -1 on error. */
+ Return 0 on success. Raise an exception and return -1 on error. */
int
_PyOS_URandom(void *buffer, Py_ssize_t size)
{
- if (size < 0) {
- PyErr_Format(PyExc_ValueError,
- "negative argument not allowed");
- return -1;
- }
- if (size == 0)
- return 0;
-
-#ifdef MS_WINDOWS
- return win32_urandom((unsigned char *)buffer, size, 1);
-#elif defined(PY_GETENTROPY)
- return py_getentropy(buffer, size, 0);
-#else
- return dev_urandom_python((char*)buffer, size);
-#endif
+ return pyurandom(buffer, size, 1);
}
void
@@ -463,13 +558,14 @@ void
}
}
else {
-#ifdef MS_WINDOWS
- (void)win32_urandom(secret, secret_size, 0);
-#elif defined(PY_GETENTROPY)
- (void)py_getentropy(secret, secret_size, 1);
-#else
- dev_urandom_noraise(secret, secret_size);
-#endif
+ int res;
+
+ /* _PyRandom_Init() is called very early in the Python initialization
+ and so exceptions cannot be used (use raise=0). */
+ res = pyurandom(secret, secret_size, 0);
+ if (res < 0) {
+ Py_FatalError("failed to get random numbers to initialize Python");
+ }
}
}
@@ -481,8 +577,6 @@ void
CryptReleaseContext(hCryptProv, 0);
hCryptProv = 0;
}
-#elif defined(PY_GETENTROPY)
- /* nothing to clean */
#else
dev_urandom_close();
#endif

12
gnu/packages/python.scm
View file

@ -203,6 +203,7 @@ (define-public python-2.7
'("Lib/subprocess.py"
"Lib/popen2.py"
"Lib/distutils/tests/test_spawn.py"
"Lib/test/support/__init__.py"
"Lib/test/test_subprocess.py"))
(("/bin/sh") (which "sh")))
@ -328,23 +329,22 @@ (define-public python-2.7
;; Current 2.x version.
(define-public python-2 python-2.7)
(define-public python-3.5
(define-public python-3.6
(package (inherit python-2)
(version "3.5.3")
(version "3.6.3")
(source (origin
(method url-fetch)
(uri (string-append "https://www.python.org/ftp/python/"
version "/Python-" version ".tar.xz"))
(patches (search-patches
"python-fix-tests.patch"
"python-3.5-fix-tests.patch"
"python-3.5-getentropy-on-old-kernels.patch"
"python-3-fix-tests.patch"
"python-3-deterministic-build-info.patch"
"python-3-search-paths.patch"))
(patch-flags '("-p0"))
(sha256
(base32
"1c6v1n9nz4mlx9mw1125fxpmbrgniqdbbx9hnqx44maqazb2mzpf"))
"1nl1raaagr4car787a2hmjv2dw6gqny53xfd6wisbgx4r5kxk9yd"))
(snippet
'(begin
(for-each delete-file
@ -361,7 +361,7 @@ (define-public python-3.5
"/site-packages"))))))))
;; Current 3.x version.
(define-public python-3 python-3.5)
(define-public python-3 python-3.6)
;; Current major version.
(define-public python python-3)