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gh-144249: Report filename in SSLContext.load_cert_chain errors #144250

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Merged
vstinner merged 4 commits into from
Jan 28, 2026
+12 −2
Merged

gh-144249: Report filename in SSLContext.load_cert_chain errors #144250

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b196c8f
gh-144249: Report filename in SSLContext.load_cert_chain errors
romuald Jan 26, 2026
6e4e980
Add missing NEWS.d entry
romuald Jan 27, 2026
e2d2e14
Fix grammar in NEWS entry
romuald Jan 27, 2026
d07e398
Update Misc/NEWS.d/next/Library/2026-01-27-09-58-52.gh-issue-144249.m…
romuald Jan 27, 2026
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6 changes: 6 additions & 0 deletions Lib/test/test_ssl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,7 @@ def data_file(*name):
EMPTYCERT = data_file("nullcert.pem")
BADCERT = data_file("badcert.pem")
NONEXISTINGCERT = data_file("XXXnonexisting.pem")
NONEXISTINGKEY = data_file("XXXnonexistingkey.pem")
BADKEY = data_file("badkey.pem")
NOKIACERT = data_file("nokia.pem")
NULLBYTECERT = data_file("nullbytecert.pem")
Expand Down Expand Up @@ -1229,6 +1230,11 @@ def test_load_cert_chain(self):
with self.assertRaises(OSError) as cm:
ctx.load_cert_chain(NONEXISTINGCERT)
self.assertEqual(cm.exception.errno, errno.ENOENT)
self.assertEqual(cm.exception.filename, NONEXISTINGCERT)
with self.assertRaises(OSError) as cm:
ctx.load_cert_chain(CERTFILE, keyfile=NONEXISTINGKEY)
self.assertEqual(cm.exception.errno, errno.ENOENT)
self.assertEqual(cm.exception.filename, NONEXISTINGKEY)
with self.assertRaisesRegex(ssl.SSLError, "PEM (lib|routines)"):
ctx.load_cert_chain(BADCERT)
with self.assertRaisesRegex(ssl.SSLError, "PEM (lib|routines)"):
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2026-01-27-09-58-52.gh-issue-144249.mCIy95.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Add filename context to :exc:`OSError` exceptions raised by
:func:`ssl.SSLContext.load_cert_chain`, allowing users to have more context.
6 changes: 4 additions & 2 deletions Modules/_ssl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4517,7 +4517,8 @@ load_cert_chain_lock_held(PySSLContext *self, _PySSLPasswordInfo *pw_info,
/* the password callback has already set the error information */
}
else if (errno != 0) {
PyErr_SetFromErrno(PyExc_OSError);
PyErr_SetFromErrnoWithFilename(PyExc_OSError,
PyBytes_AS_STRING(certfile_bytes));
ERR_clear_error();
}
else {
Expand All @@ -4537,7 +4538,8 @@ load_cert_chain_lock_held(PySSLContext *self, _PySSLPasswordInfo *pw_info,
/* the password callback has already set the error information */
}
else if (errno != 0) {
PyErr_SetFromErrno(PyExc_OSError);
PyErr_SetFromErrnoWithFilename(PyExc_OSError,
PyBytes_AS_STRING(keyfile_bytes ? keyfile_bytes : certfile_bytes));
ERR_clear_error();
}
else {
Expand Down
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