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python3.12/SOURCES/00329-fips.patch

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import python3.12-3.12.5-2.el10
1 month ago
From d307f5706434e0cb445fb48291852bd7ec46ddbd Mon Sep 17 00:00:00 2001
From: Charalampos Stratakis <cstratak@redhat.com>
Date: Thu, 12 Dec 2019 16:58:31 +0100
Subject: [PATCH 1/5] Expose blake2b and blake2s hashes from OpenSSL
These aren't as powerful as Python's own implementation, but they can be
used under FIPS.
---
Lib/test/test_hashlib.py | 6 ++
Modules/_hashopenssl.c | 37 ++++++++
Modules/clinic/_hashopenssl.c.h | 152 +++++++++++++++++++++++++++++++-
3 files changed, 194 insertions(+), 1 deletion(-)
diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index 73d758a..5921360 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -375,6 +375,12 @@ class HashLibTestCase(unittest.TestCase):
# 2 is for hashlib.name(...) and hashlib.new(name, ...)
self.assertGreaterEqual(len(constructors), 2)
for hash_object_constructor in constructors:
+
+ # OpenSSL's blake2s & blake2d don't support `key`
+ _name = hash_object_constructor.__name__
+ if 'key' in kwargs and _name.startswith('openssl_blake2'):
+ return
+
m = hash_object_constructor(data, **kwargs)
computed = m.hexdigest() if not shake else m.hexdigest(length)
self.assertEqual(
diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index af6d1b2..980712f 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -1079,6 +1079,41 @@ _hashlib_openssl_sha512_impl(PyObject *module, PyObject *data_obj,
}
+/*[clinic input]
+_hashlib.openssl_blake2b
+ string as data_obj: object(py_default="b''") = NULL
+ *
+ usedforsecurity: bool = True
+Returns a blake2b hash object; optionally initialized with a string
+[clinic start generated code]*/
+
+static PyObject *
+_hashlib_openssl_blake2b_impl(PyObject *module, PyObject *data_obj,
+ int usedforsecurity)
+/*[clinic end generated code: output=7a838b1643cde13e input=4ad7fd54268f3689]*/
+
+{
+ return py_evp_fromname(module, Py_hash_blake2b, data_obj, usedforsecurity);
+}
+
+/*[clinic input]
+_hashlib.openssl_blake2s
+ string as data_obj: object(py_default="b''") = NULL
+ *
+ usedforsecurity: bool = True
+Returns a blake2s hash object; optionally initialized with a string
+[clinic start generated code]*/
+
+static PyObject *
+_hashlib_openssl_blake2s_impl(PyObject *module, PyObject *data_obj,
+ int usedforsecurity)
+/*[clinic end generated code: output=4eda6b40757471da input=1ed39481ffa4e26a]*/
+
+{
+ return py_evp_fromname(module, Py_hash_blake2s, data_obj, usedforsecurity);
+}
+
+
#ifdef PY_OPENSSL_HAS_SHA3
/*[clinic input]
@@ -2067,6 +2102,8 @@ static struct PyMethodDef EVP_functions[] = {
_HASHLIB_OPENSSL_SHA256_METHODDEF
_HASHLIB_OPENSSL_SHA384_METHODDEF
_HASHLIB_OPENSSL_SHA512_METHODDEF
+ _HASHLIB_OPENSSL_BLAKE2B_METHODDEF
+ _HASHLIB_OPENSSL_BLAKE2S_METHODDEF
_HASHLIB_OPENSSL_SHA3_224_METHODDEF
_HASHLIB_OPENSSL_SHA3_256_METHODDEF
_HASHLIB_OPENSSL_SHA3_384_METHODDEF
diff --git a/Modules/clinic/_hashopenssl.c.h b/Modules/clinic/_hashopenssl.c.h
index fb61a44..1e42b87 100644
--- a/Modules/clinic/_hashopenssl.c.h
+++ b/Modules/clinic/_hashopenssl.c.h
@@ -743,6 +743,156 @@ exit:
return return_value;
}
+PyDoc_STRVAR(_hashlib_openssl_blake2b__doc__,
+"openssl_blake2b($module, /, string=b\'\', *, usedforsecurity=True)\n"
+"--\n"
+"\n"
+"Returns a blake2b hash object; optionally initialized with a string");
+
+#define _HASHLIB_OPENSSL_BLAKE2B_METHODDEF \
+ {"openssl_blake2b", _PyCFunction_CAST(_hashlib_openssl_blake2b), METH_FASTCALL|METH_KEYWORDS, _hashlib_openssl_blake2b__doc__},
+
+static PyObject *
+_hashlib_openssl_blake2b_impl(PyObject *module, PyObject *data_obj,
+ int usedforsecurity);
+
+static PyObject *
+_hashlib_openssl_blake2b(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
+{
+ PyObject *return_value = NULL;
+ #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+
+ #define NUM_KEYWORDS 2
+ static struct {
+ PyGC_Head _this_is_not_used;
+ PyObject_VAR_HEAD
+ PyObject *ob_item[NUM_KEYWORDS];
+ } _kwtuple = {
+ .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
+ .ob_item = { &_Py_ID(string), &_Py_ID(usedforsecurity), },
+ };
+ #undef NUM_KEYWORDS
+ #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+ #else // !Py_BUILD_CORE
+ # define KWTUPLE NULL
+ #endif // !Py_BUILD_CORE
+
+ static const char * const _keywords[] = {"string", "usedforsecurity", NULL};
+ static _PyArg_Parser _parser = {
+ .keywords = _keywords,
+ .fname = "openssl_blake2b",
+ .kwtuple = KWTUPLE,
+ };
+ #undef KWTUPLE
+ PyObject *argsbuf[2];
+ Py_ssize_t noptargs = nargs + (kwnames ? PyTuple_GET_SIZE(kwnames) : 0) - 0;
+ PyObject *data_obj = NULL;
+ int usedforsecurity = 1;
+
+ args = _PyArg_UnpackKeywords(args, nargs, NULL, kwnames, &_parser, 0, 1, 0, argsbuf);
+ if (!args) {
+ goto exit;
+ }
+ if (!noptargs) {
+ goto skip_optional_pos;
+ }
+ if (args[0]) {
+ data_obj = args[0];
+ if (!--noptargs) {
+ goto skip_optional_pos;
+ }
+ }
+skip_optional_pos:
+ if (!noptargs) {
+ goto skip_optional_kwonly;
+ }
+ usedforsecurity = PyObject_IsTrue(args[1]);
+ if (usedforsecurity < 0) {
+ goto exit;
+ }
+skip_optional_kwonly:
+ return_value = _hashlib_openssl_blake2b_impl(module, data_obj, usedforsecurity);
+
+exit:
+ return return_value;
+}
+
+PyDoc_STRVAR(_hashlib_openssl_blake2s__doc__,
+"openssl_blake2s($module, /, string=b\'\', *, usedforsecurity=True)\n"
+"--\n"
+"\n"
+"Returns a blake2s hash object; optionally initialized with a string");
+
+#define _HASHLIB_OPENSSL_BLAKE2S_METHODDEF \
+ {"openssl_blake2s", _PyCFunction_CAST(_hashlib_openssl_blake2s), METH_FASTCALL|METH_KEYWORDS, _hashlib_openssl_blake2s__doc__},
+
+static PyObject *
+_hashlib_openssl_blake2s_impl(PyObject *module, PyObject *data_obj,
+ int usedforsecurity);
+
+static PyObject *
+_hashlib_openssl_blake2s(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
+{
+ PyObject *return_value = NULL;
+ #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+
+ #define NUM_KEYWORDS 2
+ static struct {
+ PyGC_Head _this_is_not_used;
+ PyObject_VAR_HEAD
+ PyObject *ob_item[NUM_KEYWORDS];
+ } _kwtuple = {
+ .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
+ .ob_item = { &_Py_ID(string), &_Py_ID(usedforsecurity), },
+ };
+ #undef NUM_KEYWORDS
+ #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+ #else // !Py_BUILD_CORE
+ # define KWTUPLE NULL
+ #endif // !Py_BUILD_CORE
+
+ static const char * const _keywords[] = {"string", "usedforsecurity", NULL};
+ static _PyArg_Parser _parser = {
+ .keywords = _keywords,
+ .fname = "openssl_blake2s",
+ .kwtuple = KWTUPLE,
+ };
+ #undef KWTUPLE
+ PyObject *argsbuf[2];
+ Py_ssize_t noptargs = nargs + (kwnames ? PyTuple_GET_SIZE(kwnames) : 0) - 0;
+ PyObject *data_obj = NULL;
+ int usedforsecurity = 1;
+
+ args = _PyArg_UnpackKeywords(args, nargs, NULL, kwnames, &_parser, 0, 1, 0, argsbuf);
+ if (!args) {
+ goto exit;
+ }
+ if (!noptargs) {
+ goto skip_optional_pos;
+ }
+ if (args[0]) {
+ data_obj = args[0];
+ if (!--noptargs) {
+ goto skip_optional_pos;
+ }
+ }
+skip_optional_pos:
+ if (!noptargs) {
+ goto skip_optional_kwonly;
+ }
+ usedforsecurity = PyObject_IsTrue(args[1]);
+ if (usedforsecurity < 0) {
+ goto exit;
+ }
+skip_optional_kwonly:
+ return_value = _hashlib_openssl_blake2s_impl(module, data_obj, usedforsecurity);
+
+exit:
+ return return_value;
+}
+
#if defined(PY_OPENSSL_HAS_SHA3)
PyDoc_STRVAR(_hashlib_openssl_sha3_224__doc__,
@@ -1851,4 +2001,4 @@ exit:
#ifndef _HASHLIB_SCRYPT_METHODDEF
#define _HASHLIB_SCRYPT_METHODDEF
#endif /* !defined(_HASHLIB_SCRYPT_METHODDEF) */
-/*[clinic end generated code: output=b339e255db698147 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=1d988d457a8beebe input=a9049054013a1b77]*/
--
2.45.0
From c247ff164269fb68236a79a1359cc37c1a8a0004 Mon Sep 17 00:00:00 2001
From: Petr Viktorin <pviktori@redhat.com>
Date: Thu, 25 Jul 2019 17:19:06 +0200
Subject: [PATCH 2/5] Disable Python's hash implementations in FIPS mode,
forcing OpenSSL
---
Lib/hashlib.py | 11 +++++++----
Lib/test/test_hashlib.py | 17 ++++++++++++-----
Modules/_blake2/blake2b_impl.c | 4 ++++
Modules/_blake2/blake2module.c | 5 ++++-
Modules/_blake2/blake2s_impl.c | 4 ++++
Modules/hashlib.h | 23 +++++++++++++++++++++++
configure.ac | 3 ++-
7 files changed, 56 insertions(+), 11 deletions(-)
diff --git a/Lib/hashlib.py b/Lib/hashlib.py
index 1b16441..9897402 100644
--- a/Lib/hashlib.py
+++ b/Lib/hashlib.py
@@ -70,14 +70,17 @@ __all__ = __always_supported + ('new', 'algorithms_guaranteed',
__builtin_constructor_cache = {}
-# Prefer our blake2 implementation
+# Prefer our blake2 implementation (unless in FIPS mode)
# OpenSSL 1.1.0 comes with a limited implementation of blake2b/s. The OpenSSL
# implementations neither support keyed blake2 (blake2 MAC) nor advanced
# features like salt, personalization, or tree hashing. OpenSSL hash-only
# variants are available as 'blake2b512' and 'blake2s256', though.
-__block_openssl_constructor = {
- 'blake2b', 'blake2s',
-}
+import _hashlib
+if _hashlib.get_fips_mode():
+ __block_openssl_constructor = set()
+else:
+ __block_openssl_constructor = {'blake2b', 'blake2s'}
+
def __get_builtin_constructor(name):
cache = __builtin_constructor_cache
diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index 5921360..dd61a9a 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -35,14 +35,15 @@ else:
m.strip() for m in builtin_hashes.strip('"').lower().split(",")
}
-# hashlib with and without OpenSSL backend for PBKDF2
-# only import builtin_hashlib when all builtin hashes are available.
-# Otherwise import prints noise on stderr
+# RHEL: `_hashlib` is always importable and `hashlib` can't be imported
+# without it.
openssl_hashlib = import_fresh_module('hashlib', fresh=['_hashlib'])
-if builtin_hashes == default_builtin_hashes:
+try:
builtin_hashlib = import_fresh_module('hashlib', blocked=['_hashlib'])
-else:
+except ImportError:
builtin_hashlib = None
+else:
+ raise AssertionError('hashlib is importable without _hashlib')
try:
from _hashlib import HASH, HASHXOF, openssl_md_meth_names, get_fips_mode
@@ -114,6 +115,12 @@ class HashLibTestCase(unittest.TestCase):
except ModuleNotFoundError as error:
if self._warn_on_extension_import and module_name in builtin_hashes:
warnings.warn(f'Did a C extension fail to compile? {error}')
+ except ImportError:
+ if get_fips_mode() and module_name == '_blake2':
+ # blake2b & blake2s disabled under FIPS
+ return None
+ else:
+ raise
return None
def __init__(self, *args, **kwargs):
diff --git a/Modules/_blake2/blake2b_impl.c b/Modules/_blake2/blake2b_impl.c
index c2cac98..55b1677 100644
--- a/Modules/_blake2/blake2b_impl.c
+++ b/Modules/_blake2/blake2b_impl.c
@@ -98,6 +98,8 @@ py_blake2b_new_impl(PyTypeObject *type, PyObject *data, int digest_size,
BLAKE2bObject *self = NULL;
Py_buffer buf;
+ FAIL_RETURN_IN_FIPS_MODE(PyExc_ValueError, "_blake2");
+
self = new_BLAKE2bObject(type);
if (self == NULL) {
goto error;
@@ -276,6 +278,8 @@ _blake2_blake2b_update(BLAKE2bObject *self, PyObject *data)
{
Py_buffer buf;
+ FAIL_RETURN_IN_FIPS_MODE(PyExc_ValueError, "_blake2");
+
GET_BUFFER_VIEW_OR_ERROUT(data, &buf);
if (self->lock == NULL && buf.len >= HASHLIB_GIL_MINSIZE)
diff --git a/Modules/_blake2/blake2module.c b/Modules/_blake2/blake2module.c
index 5df9fd3..10736c2 100644
--- a/Modules/_blake2/blake2module.c
+++ b/Modules/_blake2/blake2module.c
@@ -13,6 +13,7 @@
#endif
#include "Python.h"
+#include "../hashlib.h"
#include "blake2module.h"
extern PyType_Spec blake2b_type_spec;
@@ -83,6 +84,7 @@ _blake2_free(void *module)
static int
blake2_exec(PyObject *m)
{
+
Blake2State* st = blake2_get_state(m);
st->blake2b_type = (PyTypeObject *)PyType_FromModuleAndSpec(
@@ -155,5 +157,6 @@ static struct PyModuleDef blake2_module = {
PyMODINIT_FUNC
PyInit__blake2(void)
{
+ FAIL_RETURN_IN_FIPS_MODE(PyExc_ImportError, "blake2");
return PyModuleDef_Init(&blake2_module);
-}
+}
\ No newline at end of file
diff --git a/Modules/_blake2/blake2s_impl.c b/Modules/_blake2/blake2s_impl.c
index 1c47328..cd4a202 100644
--- a/Modules/_blake2/blake2s_impl.c
+++ b/Modules/_blake2/blake2s_impl.c
@@ -98,6 +98,8 @@ py_blake2s_new_impl(PyTypeObject *type, PyObject *data, int digest_size,
BLAKE2sObject *self = NULL;
Py_buffer buf;
+ FAIL_RETURN_IN_FIPS_MODE(PyExc_ValueError, "_blake2");
+
self = new_BLAKE2sObject(type);
if (self == NULL) {
goto error;
@@ -276,6 +278,8 @@ _blake2_blake2s_update(BLAKE2sObject *self, PyObject *data)
{
Py_buffer buf;
+ FAIL_RETURN_IN_FIPS_MODE(PyExc_ValueError, "_blake2");
+
GET_BUFFER_VIEW_OR_ERROUT(data, &buf);
if (self->lock == NULL && buf.len >= HASHLIB_GIL_MINSIZE)
diff --git a/Modules/hashlib.h b/Modules/hashlib.h
index a8bad9d..1b1d937 100644
--- a/Modules/hashlib.h
+++ b/Modules/hashlib.h
@@ -1,5 +1,11 @@
/* Common code for use by all hashlib related modules. */
+// RHEL: use OpenSSL to turn off unsupported modules under FIPS mode
+// EVP_default_properties_is_fips_enabled() on OpenSSL >= 3.0.0
+#include <openssl/evp.h>
+// FIPS_mode() on OpenSSL < 3.0.0
+#include <openssl/crypto.h>
+
/*
* Given a PyObject* obj, fill in the Py_buffer* viewp with the result
* of PyObject_GetBuffer. Sets an exception and issues the erraction
@@ -64,3 +70,20 @@
* to allow the user to optimize based on the platform they're using. */
#define HASHLIB_GIL_MINSIZE 2048
+__attribute__((__unused__))
+static int
+_Py_hashlib_fips_error(PyObject *exc, char *name) {
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+ if (EVP_default_properties_is_fips_enabled(NULL)) {
+#else
+ if (FIPS_mode()) {
+#endif
+ PyErr_Format(exc, "%s is not available in FIPS mode", name);
+ return 1;
+ }
+ return 0;
+}
+
+#define FAIL_RETURN_IN_FIPS_MODE(exc, name) do { \
+ if (_Py_hashlib_fips_error(exc, name)) return NULL; \
+} while (0)
diff --git a/configure.ac b/configure.ac
index 384718d..c4a1198 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7445,7 +7445,8 @@ PY_STDLIB_MOD([_sha2],
PY_STDLIB_MOD([_sha3], [test "$with_builtin_sha3" = yes])
PY_STDLIB_MOD([_blake2],
[test "$with_builtin_blake2" = yes], [],
- [$LIBB2_CFLAGS], [$LIBB2_LIBS])
+ [$LIBB2_CFLAGS $OPENSSL_INCLUDES],
+ [$LIBB2_LIBS $OPENSSL_LDFLAGS $OPENSSL_LDFLAGS_RPATH $OPENSSL_LIBS])
PY_STDLIB_MOD([_crypt],
[], [test "$ac_cv_crypt_crypt" = yes],
--
2.45.0
From e58b32f238f1d4503248f3a8b1489f7567bdbd6d Mon Sep 17 00:00:00 2001
From: Charalampos Stratakis <cstratak@redhat.com>
Date: Fri, 29 Jan 2021 14:16:21 +0100
Subject: [PATCH 3/5] Use python's fall back crypto implementations only if we
are not in FIPS mode
---
Lib/hashlib.py | 8 +++++---
Lib/test/test_hashlib.py | 22 +++++++++++++++++++++-
2 files changed, 26 insertions(+), 4 deletions(-)
diff --git a/Lib/hashlib.py b/Lib/hashlib.py
index 9897402..159215a 100644
--- a/Lib/hashlib.py
+++ b/Lib/hashlib.py
@@ -83,6 +83,8 @@ else:
def __get_builtin_constructor(name):
+ if _hashlib.get_fips_mode():
+ raise ValueError('unsupported hash type ' + name + '(in FIPS mode)')
cache = __builtin_constructor_cache
constructor = cache.get(name)
if constructor is not None:
@@ -178,21 +180,21 @@ try:
except ImportError:
_hashlib = None
new = __py_new
- __get_hash = __get_builtin_constructor
+ raise # importing _hashlib should never fail on RHEL
try:
# OpenSSL's PKCS5_PBKDF2_HMAC requires OpenSSL 1.0+ with HMAC and SHA
from _hashlib import pbkdf2_hmac
__all__ += ('pbkdf2_hmac',)
except ImportError:
- pass
+ raise # importing _hashlib should never fail on RHEL
try:
# OpenSSL's scrypt requires OpenSSL 1.1+
from _hashlib import scrypt
except ImportError:
- pass
+ raise # importing _hashlib should never fail on RHEL
def file_digest(fileobj, digest, /, *, _bufsize=2**18):
diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index dd61a9a..6031b02 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -167,7 +167,13 @@ class HashLibTestCase(unittest.TestCase):
constructors.add(constructor)
def add_builtin_constructor(name):
- constructor = getattr(hashlib, "__get_builtin_constructor")(name)
+ try:
+ constructor = getattr(hashlib, "__get_builtin_constructor")(name)
+ except ValueError:
+ if get_fips_mode():
+ return
+ else:
+ raise
self.constructors_to_test[name].add(constructor)
_md5 = self._conditional_import_module('_md5')
@@ -260,6 +266,20 @@ class HashLibTestCase(unittest.TestCase):
def test_new_upper_to_lower(self):
self.assertEqual(hashlib.new("SHA256").name, "sha256")
+ @unittest.skipUnless(get_fips_mode(), "Builtin constructor only usable in FIPS mode")
+ def test_get_builtin_constructor_fips(self):
+ get_builtin_constructor = getattr(hashlib,
+ '__get_builtin_constructor')
+ with self.assertRaises(ValueError):
+ get_builtin_constructor('md5')
+ with self.assertRaises(ValueError):
+ get_builtin_constructor('sha256')
+ with self.assertRaises(ValueError):
+ get_builtin_constructor('blake2s')
+ with self.assertRaises(ValueError):
+ get_builtin_constructor('test')
+
+ @unittest.skipIf(get_fips_mode(), "No builtin constructors in FIPS mode")
def test_get_builtin_constructor(self):
get_builtin_constructor = getattr(hashlib,
'__get_builtin_constructor')
--
2.45.0
From 2b14d347948dc01af587b9e21cd448833a38c7b5 Mon Sep 17 00:00:00 2001
From: Charalampos Stratakis <cstratak@redhat.com>
Date: Wed, 31 Jul 2019 15:43:43 +0200
Subject: [PATCH 4/5] Test equivalence of hashes for the various digests with
usedforsecurity=True/False
---
Lib/test/test_fips.py | 24 ++++++++++++++++++++
Lib/test/test_hashlib.py | 47 ++++++++++++++++++++++++++++++----------
2 files changed, 60 insertions(+), 11 deletions(-)
create mode 100644 Lib/test/test_fips.py
diff --git a/Lib/test/test_fips.py b/Lib/test/test_fips.py
new file mode 100644
index 0000000..1f99dd7
--- /dev/null
+++ b/Lib/test/test_fips.py
@@ -0,0 +1,24 @@
+import unittest
+import hashlib, _hashlib
+
+
+
+class HashlibFipsTests(unittest.TestCase):
+
+ @unittest.skipUnless(_hashlib.get_fips_mode(), "Test only when FIPS is enabled")
+ def test_fips_imports(self):
+ """blake2s and blake2b should fail to import in FIPS mode
+ """
+ with self.assertRaises(ValueError, msg='blake2s not available in FIPS'):
+ m = hashlib.blake2s()
+ with self.assertRaises(ValueError, msg='blake2b not available in FIPS'):
+ m = hashlib.blake2b()
+
+ @unittest.skipIf(_hashlib.get_fips_mode(), "blake2 hashes are not available under FIPS")
+ def test_blake2_hashes(self):
+ self.assertEqual(hashlib.blake2b(b'abc').hexdigest(), _hashlib.openssl_blake2b(b'abc').hexdigest())
+ self.assertEqual(hashlib.blake2s(b'abc').hexdigest(), _hashlib.openssl_blake2s(b'abc').hexdigest())
+
+
+if __name__ == "__main__":
+ unittest.main()
diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index 6031b02..5bd5297 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -23,6 +23,7 @@ from test.support import os_helper
from test.support import requires_resource
from test.support import threading_helper
from http.client import HTTPException
+from functools import partial
default_builtin_hashes = {'md5', 'sha1', 'sha256', 'sha512', 'sha3', 'blake2'}
@@ -55,6 +56,11 @@ except ImportError:
def get_fips_mode():
return 0
+if get_fips_mode():
+ FIPS_DISABLED = {'md5'}
+else:
+ FIPS_DISABLED = set()
+
try:
import _blake2
except ImportError:
@@ -94,6 +100,11 @@ def read_vectors(hash_name):
parts[0] = bytes.fromhex(parts[0])
yield parts
+def _is_blake2_constructor(constructor):
+ if isinstance(constructor, partial):
+ constructor = constructor.func
+ return getattr(constructor, '__name__', '').startswith('openssl_blake2')
+
class HashLibTestCase(unittest.TestCase):
supported_hash_names = ( 'md5', 'MD5', 'sha1', 'SHA1',
@@ -138,15 +149,21 @@ class HashLibTestCase(unittest.TestCase):
continue
self.constructors_to_test[algorithm] = set()
+ def _add_constructor(algorithm, constructor):
+ constructors.add(partial(constructor, usedforsecurity=False))
+ if algorithm not in FIPS_DISABLED:
+ constructors.add(constructor)
+ constructors.add(partial(constructor, usedforsecurity=True))
+
# For each algorithm, test the direct constructor and the use
# of hashlib.new given the algorithm name.
for algorithm, constructors in self.constructors_to_test.items():
- constructors.add(getattr(hashlib, algorithm))
+ _add_constructor(algorithm, getattr(hashlib, algorithm))
def _test_algorithm_via_hashlib_new(data=None, _alg=algorithm, **kwargs):
if data is None:
return hashlib.new(_alg, **kwargs)
return hashlib.new(_alg, data, **kwargs)
- constructors.add(_test_algorithm_via_hashlib_new)
+ _add_constructor(algorithm, _test_algorithm_via_hashlib_new)
_hashlib = self._conditional_import_module('_hashlib')
self._hashlib = _hashlib
@@ -158,13 +175,7 @@ class HashLibTestCase(unittest.TestCase):
for algorithm, constructors in self.constructors_to_test.items():
constructor = getattr(_hashlib, 'openssl_'+algorithm, None)
if constructor:
- try:
- constructor()
- except ValueError:
- # default constructor blocked by crypto policy
- pass
- else:
- constructors.add(constructor)
+ _add_constructor(algorithm, constructor)
def add_builtin_constructor(name):
try:
@@ -340,6 +351,8 @@ class HashLibTestCase(unittest.TestCase):
self.assertIn(h.name, self.supported_hash_names)
else:
self.assertNotIn(h.name, self.supported_hash_names)
+ if not h.name.startswith('blake2') and h.name not in FIPS_DISABLED:
+ self.assertEqual(h.name, hashlib.new(h.name).name)
self.assertEqual(
h.name,
hashlib.new(h.name, usedforsecurity=False).name
@@ -404,8 +417,10 @@ class HashLibTestCase(unittest.TestCase):
for hash_object_constructor in constructors:
# OpenSSL's blake2s & blake2d don't support `key`
- _name = hash_object_constructor.__name__
- if 'key' in kwargs and _name.startswith('openssl_blake2'):
+ if (
+ 'key' in kwargs
+ and _is_blake2_constructor(hash_object_constructor)
+ ):
return
m = hash_object_constructor(data, **kwargs)
@@ -1036,6 +1051,16 @@ class HashLibTestCase(unittest.TestCase):
with self.assertRaisesRegex(TypeError, "immutable type"):
hash_type.value = False
+ @unittest.skipUnless(get_fips_mode(), 'Needs FIPS mode.')
+ def test_usedforsecurity_repeat(self):
+ """Make sure usedforsecurity flag isn't copied to other contexts"""
+ for i in range(3):
+ for cons in hashlib.md5, partial(hashlib.new, 'md5'):
+ self.assertRaises(ValueError, cons)
+ self.assertRaises(ValueError, partial(cons, usedforsecurity=True))
+ self.assertEqual(cons(usedforsecurity=False).hexdigest(),
+ 'd41d8cd98f00b204e9800998ecf8427e')
+
class KDFTests(unittest.TestCase):
--
2.45.0
From b98c72b356a529a68cb4216526b838a57937cf6f Mon Sep 17 00:00:00 2001
From: Petr Viktorin <pviktori@redhat.com>
Date: Mon, 26 Aug 2019 19:39:48 +0200
Subject: [PATCH 5/5] Guard against Python HMAC in FIPS mode
---
Lib/hmac.py | 12 +++++++++---
Lib/test/test_hmac.py | 10 ++++++++++
2 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/Lib/hmac.py b/Lib/hmac.py
index 8b4eb2f..8930bda 100644
--- a/Lib/hmac.py
+++ b/Lib/hmac.py
@@ -16,8 +16,9 @@ else:
import hashlib as _hashlib
-trans_5C = bytes((x ^ 0x5C) for x in range(256))
-trans_36 = bytes((x ^ 0x36) for x in range(256))
+if not _hashopenssl.get_fips_mode():
+ trans_5C = bytes((x ^ 0x5C) for x in range(256))
+ trans_36 = bytes((x ^ 0x36) for x in range(256))
# The size of the digests returned by HMAC depends on the underlying
# hashing module used. Use digest_size from the instance of HMAC instead.
@@ -55,10 +56,12 @@ class HMAC:
if not digestmod:
raise TypeError("Missing required argument 'digestmod'.")
- if _hashopenssl and isinstance(digestmod, (str, _functype)):
+ if _hashopenssl.get_fips_mode() or (_hashopenssl and isinstance(digestmod, (str, _functype))):
try:
self._init_hmac(key, msg, digestmod)
except _hashopenssl.UnsupportedDigestmodError:
+ if _hashopenssl.get_fips_mode():
+ raise
self._init_old(key, msg, digestmod)
else:
self._init_old(key, msg, digestmod)
@@ -69,6 +72,9 @@ class HMAC:
self.block_size = self._hmac.block_size
def _init_old(self, key, msg, digestmod):
+ if _hashopenssl.get_fips_mode():
+ # In FIPS mode, use OpenSSL anyway: raise the appropriate error
+ return self._init_hmac(key, msg, digestmod)
if callable(digestmod):
digest_cons = digestmod
elif isinstance(digestmod, str):
diff --git a/Lib/test/test_hmac.py b/Lib/test/test_hmac.py
index a39a2c4..b7b24ab 100644
--- a/Lib/test/test_hmac.py
+++ b/Lib/test/test_hmac.py
@@ -5,6 +5,7 @@ import hashlib
import unittest
import unittest.mock
import warnings
+from _hashlib import get_fips_mode
from test.support import hashlib_helper, check_disallow_instantiation
@@ -351,6 +352,11 @@ class TestVectorsTestCase(unittest.TestCase):
def digest(self):
return self._x.digest()
+ if get_fips_mode():
+ with self.assertRaises(ValueError):
+ hmac.HMAC(b'a', b'b', digestmod=MockCrazyHash)
+ return
+
with warnings.catch_warnings():
warnings.simplefilter('error', RuntimeWarning)
with self.assertRaises(RuntimeWarning):
@@ -373,6 +379,7 @@ class TestVectorsTestCase(unittest.TestCase):
with self.assertRaisesRegex(TypeError, r'required.*digestmod'):
hmac.HMAC(key, msg=data, digestmod='')
+ @unittest.skipIf(get_fips_mode(), "No builtin constructors in FIPS mode")
def test_with_fallback(self):
cache = getattr(hashlib, '__builtin_constructor_cache')
try:
@@ -453,6 +460,7 @@ class ConstructorTestCase(unittest.TestCase):
with self.assertRaisesRegex(TypeError, "immutable type"):
C_HMAC.value = None
+ @unittest.skipIf(get_fips_mode(), "_sha256 unavailable in FIPS mode")
@unittest.skipUnless(sha256_module is not None, 'need _sha256')
def test_with_sha256_module(self):
h = hmac.HMAC(b"key", b"hash this!", digestmod=sha256_module.sha256)
@@ -481,6 +489,7 @@ class SanityTestCase(unittest.TestCase):
class CopyTestCase(unittest.TestCase):
+ @unittest.skipIf(get_fips_mode(), "_init_old unavailable in FIPS mode")
@hashlib_helper.requires_hashdigest('sha256')
def test_attributes_old(self):
# Testing if attributes are of same type.
@@ -492,6 +501,7 @@ class CopyTestCase(unittest.TestCase):
self.assertEqual(type(h1._outer), type(h2._outer),
"Types of outer don't match.")
+ @unittest.skipIf(get_fips_mode(), "_init_old unavailable in FIPS mode")
@hashlib_helper.requires_hashdigest('sha256')
def test_realcopy_old(self):
# Testing if the copy method created a real copy.
--
2.45.0