[rpms/python3.10] f44: Fix ssl.SSLError: [ASN1: NOT_ENOUGH_DATA] not enough data with OpenSSL 3.5.7+

[rpms/python3.10] f44: Fix ssl.SSLError: [ASN1: NOT_ENOUGH_DATA] not enough data with OpenSSL 3.5.7+

[@ 2026-07-02 14:02 UTC (permalink / raw)]

A new commit has been pushed.

Repo   : rpms/python3.10
Branch : f44
Commit : 16aa6aa9ffefb7c724be998444c3d6a41f393827
Author : Miro Hrončok <miro@hroncok.cz>
Date   : 2026-07-02T10:59:38+02:00
Stats  : +88/-0 in 2 file(s)
URL    : https://src.fedoraproject.org/rpms/python3.10/c/16aa6aa9ffefb7c724be998444c3d6a41f393827?branch=f44

Log:
Fix ssl.SSLError: [ASN1: NOT_ENOUGH_DATA] not enough data with OpenSSL 3.5.7+

---
diff --git a/00489-openssl-3.5.7.patch b/00489-openssl-3.5.7.patch
new file mode 100644
index 0000000..ea5bf03
--- /dev/null
+++ b/00489-openssl-3.5.7.patch
@@ -0,0 +1,75 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: David Benjamin <davidben@google.com>
+Date: Fri, 24 Mar 2023 09:04:30 -0400
+Subject: 00489: Use BIO_eof to detect EOF for SSL_FILETYPE_ASN1
+
+In PEM, we need to parse until error and then suppress `PEM_R_NO_START_LINE`, because PEM allows arbitrary leading and trailing data. DER, however, does not. Parsing until error and suppressing `ASN1_R_HEADER_TOO_LONG` doesn't quite work because that error also covers some cases that should be rejected.
+
+Instead, check `BIO_eof` early and stop the loop that way.
+
+This fixes https://github.com/python/cpython/issues/151504 and adds compatibility with OpenSSL 3.5.7+
+
+(cherry-picked from commit acfe02f3b05436658d92add6b168538b30f357f0)
+---
+ Lib/test/test_ssl.py                                   |  2 ++
+ .../2022-12-20-10-55-14.gh-issue-100372.utfP65.rst     |  2 ++
+ Modules/_ssl.c                                         | 10 ++++++----
+ 3 files changed, 10 insertions(+), 4 deletions(-)
+ create mode 100644 Misc/NEWS.d/next/Library/2022-12-20-10-55-14.gh-issue-100372.utfP65.rst
+
+diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
+index 21d3676c22..f772bd6ab6 100644
+--- a/Lib/test/test_ssl.py
++++ b/Lib/test/test_ssl.py
+@@ -1533,6 +1533,8 @@ def test_load_verify_cadata(self):
+             "not enough data: cadata does not contain a certificate"
+         ):
+             ctx.load_verify_locations(cadata=b"broken")
++        with self.assertRaises(ssl.SSLError):
++            ctx.load_verify_locations(cadata=cacert_der + b"A")
+ 
+     @unittest.skipIf(Py_DEBUG_WIN32, "Avoid mixing debug/release CRT on Windows")
+     def test_load_dh_params(self):
+diff --git a/Misc/NEWS.d/next/Library/2022-12-20-10-55-14.gh-issue-100372.utfP65.rst b/Misc/NEWS.d/next/Library/2022-12-20-10-55-14.gh-issue-100372.utfP65.rst
+new file mode 100644
+index 0000000000..ec37aff509
+--- /dev/null
++++ b/Misc/NEWS.d/next/Library/2022-12-20-10-55-14.gh-issue-100372.utfP65.rst
+@@ -0,0 +1,2 @@
++:meth:`ssl.SSLContext.load_verify_locations` no longer incorrectly accepts
++some cases of trailing data when parsing DER.
+diff --git a/Modules/_ssl.c b/Modules/_ssl.c
+index 6f5fb23b8b..7b3cf61474 100644
+--- a/Modules/_ssl.c
++++ b/Modules/_ssl.c
+@@ -3949,7 +3949,7 @@ _add_ca_certs(PySSLContext *self, const void *data, Py_ssize_t len,
+ {
+     BIO *biobuf = NULL;
+     X509_STORE *store;
+-    int retval = -1, err, loaded = 0;
++    int retval = -1, err, loaded = 0, was_bio_eof = 0;
+ 
+     assert(filetype == SSL_FILETYPE_ASN1 || filetype == SSL_FILETYPE_PEM);
+ 
+@@ -3977,6 +3977,10 @@ _add_ca_certs(PySSLContext *self, const void *data, Py_ssize_t len,
+         int r;
+ 
+         if (filetype == SSL_FILETYPE_ASN1) {
++            if (BIO_eof(biobuf)) {
++                was_bio_eof = 1;
++                break;
++            }
+             cert = d2i_X509_bio(biobuf, NULL);
+         } else {
+             cert = PEM_read_bio_X509(biobuf, NULL,
+@@ -4012,9 +4016,7 @@ _add_ca_certs(PySSLContext *self, const void *data, Py_ssize_t len,
+         }
+         _setSSLError(get_state_ctx(self), msg, 0, __FILE__, __LINE__);
+         retval = -1;
+-    } else if ((filetype == SSL_FILETYPE_ASN1) &&
+-                    (ERR_GET_LIB(err) == ERR_LIB_ASN1) &&
+-                    (ERR_GET_REASON(err) == ASN1_R_HEADER_TOO_LONG)) {
++    } else if ((filetype == SSL_FILETYPE_ASN1) && was_bio_eof) {
+         /* EOF ASN1 file, not an error */
+         ERR_clear_error();
+         retval = 0;

diff --git a/python3.10.spec b/python3.10.spec
index b076721..53f3806 100644
--- a/python3.10.spec
+++ b/python3.10.spec
@@ -369,6 +369,18 @@ Patch474: 00474-cve-2025-15366.patch
 # (cherry-picked from commit b234a2b67539f787e191d2ef19a7cbdce32874e7)
 Patch475: 00475-cve-2025-15367.patch
 
+# 00489 # 008af720a5f6f98ed3feb8ebdbf88ab9dea4db22
+# Use BIO_eof to detect EOF for SSL_FILETYPE_ASN1
+#
+# In PEM, we need to parse until error and then suppress `PEM_R_NO_START_LINE`, because PEM allows arbitrary leading and trailing data. DER, however, does not. Parsing until error and suppressing `ASN1_R_HEADER_TOO_LONG` doesn't quite work because that error also covers some cases that should be rejected.
+#
+# Instead, check `BIO_eof` early and stop the loop that way.
+#
+# This fixes https://github.com/python/cpython/issues/151504 and adds compatibility with OpenSSL 3.5.7+
+#
+# (cherry-picked from commit acfe02f3b05436658d92add6b168538b30f357f0)
+Patch489: 00489-openssl-3.5.7.patch
+
 # (New patches go here ^^^)
 #
 # When adding new patches to "python" and "python3" in Fedora, EL, etc.,
@@ -1670,6 +1682,7 @@ CheckPython optimized
 %changelog
 * Sat Apr 11 2026 Miro Hrončok <mhroncok@redhat.com> - 3.10.20-2
 - Explicitly build with OpenSSL 3
+- Fix ssl.SSLError: [ASN1: NOT_ENOUGH_DATA] not enough data with OpenSSL 3.5.7+
 
 * Tue Mar 03 2026 Tomáš Hrnčiar <thrnciar@redhat.com> - 3.10.20-1
 - Update to 3.10.20