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Gregory P. Smith c5fcdb4a9b gh-146311: Reject non-canonical padding bits in base32, 64, & 85 decoding (GH-146312) 
Add `canonical=False` keyword argument to `a2b_base64`, `a2b_base32`, `a2b_base85`, and `a2b_ascii85` (and their `base64` module wrappers). When `canonical=True`, non-canonical encodings are rejected per [RFC 4648 section 3.5](https://datatracker.ietf.org/doc/html/rfc4648.html#section-3.5).

This is independent of `strict_mode`.

For base85/ascii85, the check also rejects single-character final groups (never produced by a conforming encoder) and verifies partial group padding matches what the encoder would produce.

Co-authored-by: Serhiy Storchaka via lots of great code review!
2026-04-25 16:02:51 -07:00
..
_ctypes
gh-148464: Add missing `__ctype_le/be__` attributes for complex types in the ctype module (GH-148485)
2026-04-17 14:09:09 +02:00
_decimal
GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)
2026-04-02 23:20:13 +02:00
_hacl
…
_io
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_multiprocessing
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_remote_debugging
gh-148989: _remote_debugging: Remove dead code, unnecessary gc state read (#148990)
2026-04-25 22:28:51 +01:00
_sqlite
gh-146090: fix memory management of internal sqlite3 callback contexts (#146569)
2026-03-29 14:21:37 +02:00
_sre
GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)
2026-04-02 23:20:13 +02:00
_ssl
gh-146207: Add support for OpenSSL 4.0.0 alpha1 (#146217)
2026-03-25 07:44:47 +01:00
_testcapi
gh-145921: Add "_DuringGC" functions for tp_traverse (GH-145925)
2026-04-08 09:15:11 +02:00
_testinternalcapi
gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)
2026-04-24 10:37:01 +01:00
_testlimitedcapi
gh-145921: Add "_DuringGC" functions for tp_traverse (GH-145925)
2026-04-08 09:15:11 +02:00
_xxtestfuzz
Update and expand the 'Fuzz Tests for CPython' README (#148270)
2026-04-09 08:52:30 +01:00
_zstd
gh-146578: _zstd: Fix printf format for pledged size errors (#146576)
2026-04-21 12:49:44 -07:00
cjkcodecs
GH-145247: Use _PyTuple_FromPair in Modules (part 2) (#148003)
2026-04-02 23:24:03 +02:00
clinic
gh-146311: Reject non-canonical padding bits in base32, 64, & 85 decoding (GH-146312)
2026-04-25 16:02:51 -07:00
expat
gh-146083: Upgrade bundled Expat to 2.7.5 (#146085)
2026-03-29 19:05:14 +02:00
_abc.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_asynciomodule.c
gh-148274: properly handle result from PyObject_VisitManagedDict (#148275)
2026-04-09 18:50:50 +05:30
_bisectmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_bz2module.c
gh-148395: Fix a possible UAF in {LZMA,BZ2,_Zlib}Decompressor (GH-148396)
2026-04-12 18:14:54 -07:00
_codecsmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_collectionsmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_csv.c
gh-145105: Fix crash in csv.reader with re-entrant iterator (GH-145106)
2026-04-11 15:18:02 -07:00
_curses_panel.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_cursesmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_datetimemodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 2) (#148003)
2026-04-02 23:24:03 +02:00
_dbmmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_elementtree.c
gh-148735: Fix a UAF in Element.findtext() (#148738)
2026-04-23 15:48:00 +01:00
_functoolsmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_gdbmmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_hashopenssl.c
gh-146287: Fix signed/unsigned mismatch in _hashlib_hmac_digest_size (GH-148407)
2026-04-12 00:02:56 +00:00
_heapqmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_interpchannelsmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_interpqueuesmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_interpreters_common.h
…
_interpretersmodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 2) (#148003)
2026-04-02 23:24:03 +02:00
_json.c
gh-142831: Fix use-after-free in json encoder during re-entrant mutation (gh-142851)
2026-04-12 00:14:50 +00:00
_localemodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_lsprof.c
gh-145846: Fix memory leak in _lsprof clearEntries() context chain (#145847)
2026-04-07 22:56:19 +02:00
_lzmamodule.c
gh-148395: Fix a possible UAF in {LZMA,BZ2,_Zlib}Decompressor (GH-148396)
2026-04-12 18:14:54 -07:00
_math.h
…
_opcode.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_operator.c
GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)
2026-04-02 23:20:13 +02:00
_pickle.c
GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)
2026-04-02 23:20:13 +02:00
_posixsubprocess.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_queuemodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_randommodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_scproxy.c
…
_ssl_data_36.h
…
_ssl_data_40.h
gh-148600: Add Modules/_ssl_data_40.h data (#148601)
2026-04-15 15:59:02 +02:00
_ssl_data_111.h
…
_ssl_data_300.h
…
_ssl_data_340.h
…
_ssl.c
gh-148600: Add Modules/_ssl_data_40.h data (#148601)
2026-04-15 15:59:02 +02:00
_ssl.h
…
_stat.c
…
_statisticsmodule.c
…
_struct.c
gh-145633: Fix struct.pack('f') on s390x (#146422)
2026-03-26 11:12:49 +00:00
_suggestions.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_sysconfig.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_testbuffer.c
gh-146151: memoryview supports 'F' and 'D' format types (complex) (#146241)
2026-03-26 15:26:34 +01:00
_testcapi_feature_macros.inc
…
_testcapimodule.c
gh-148274: properly handle result from PyObject_VisitManagedDict (#148275)
2026-04-09 18:50:50 +05:30
_testclinic_limited.c
…
_testclinic.c
…
_testimportmultiple.c
…
_testinternalcapi.c
gh-148973: fix segfault on mismatch between consts size and oparg in compiler (#148974)
2026-04-25 10:47:41 +01:00
_testlimitedcapi.c
…
_testmultiphase.c
gh-145921: Add "_DuringGC" functions for tp_traverse (GH-145925)
2026-04-08 09:15:11 +02:00
_testsinglephase.c
gh-145921: Add "_DuringGC" functions for tp_traverse (GH-145925)
2026-04-08 09:15:11 +02:00
_threadmodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)
2026-04-02 23:20:13 +02:00
_tkinter.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_tracemalloc.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_typesmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_typingmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_uuidmodule.c
…
_weakref.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_winapi.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
_zoneinfo.c
gh-145883: Fix two heap-buffer-overflows in _zoneinfo (#145885)
2026-04-04 13:29:17 +01:00
addrinfo.h
…
arraymodule.c
gh-148484: Fix memory leak of iterator in array.array constructor (GH-148523)
2026-04-17 14:13:44 +02:00
atexitmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
binascii.c
gh-146311: Reject non-canonical padding bits in base32, 64, & 85 decoding (GH-146312)
2026-04-25 16:02:51 -07:00
blake2module.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
cmathmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
config.c.in
…
errnomodule.c
…
faulthandler.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
fcntlmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
gc_weakref.txt
…
gcmodule.c
gh-146527: Heap-allocate gc_stats to avoid bloating PyInterpreterState (#148057)
2026-04-04 18:42:30 +01:00
getaddrinfo.c
…
getbuildinfo.c
…
getnameinfo.c
…
getpath_noop.c
…
getpath.c
…
getpath.py
…
grpmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
hashlib.h
…
hmacmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
itertoolsmodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)
2026-04-02 23:20:13 +02:00
ld_so_aix.in
…
main.c
GH-145247: Use _PyTuple_FromPair in Modules (part 1) (#148000)
2026-04-02 23:20:13 +02:00
makesetup
…
makexp_aix
…
mathintegermodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
mathmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
md5module.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
mmapmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
overlapped.c
gh-148808: Add boundary check to asyncio.AbstractEventLoop.sock_recvf… (#148809)
2026-04-21 07:29:07 -07:00
posixmodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 2) (#148003)
2026-04-02 23:24:03 +02:00
posixmodule.h
…
pwdmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
pyexpat.c
gh-146563: add exception note for invalid Expat handler return values (#146565)
2026-04-14 19:12:47 +02:00
readline.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
README
…
resource.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
rotatingtree.c
…
rotatingtree.h
…
selectmodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 2) (#148003)
2026-04-02 23:24:03 +02:00
Setup
…
Setup.bootstrap.in
…
Setup.stdlib.in
…
sha1module.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
sha2module.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
sha3module.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
signalmodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 2) (#148003)
2026-04-02 23:24:03 +02:00
socketmodule.c
GH-145247: Use _PyTuple_FromPair in Modules (part 2) (#148003)
2026-04-02 23:24:03 +02:00
socketmodule.h
…
symtablemodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
syslogmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
termios.c
gh-146091: Fix NULL check in termios.tcsetwinsize (#146147)
2026-03-19 16:20:18 +05:30
timemodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
tkappinit.c
…
tkinter.h
…
unicodedata_db.h
…
unicodedata.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
unicodename_db.h
…
winreparse.h
…
xxlimited_35.c
…
xxlimited.c
…
xxmodule.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
xxsubtype.c
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
2026-03-24 17:47:55 +00:00
zlibmodule.c
gh-148395: Fix a possible UAF in {LZMA,BZ2,_Zlib}Decompressor (GH-148396)
2026-04-12 18:14:54 -07:00

README 

Source files for standard library extension modules,
and former extension modules that are now builtin modules.
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