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bpo-43789: OpenSSL 3.0.0 Don't call passwd callback again in error case (GH-25303)

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(cherry picked from commit d3b73f32ef)

Co-authored-by: Christian Heimes <christian@python.org>
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Miss Islington (bot) 2021-04-09 06:46:11 -07:00 • committed by GitHub
parent 4d9336d114
commit a188bd44ac
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2
Misc/NEWS.d/next/Library/2021-04-09-14-08-03.bpo-43789.eaHlAm.rst Normal file
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@ -0,0 +1,2 @@
OpenSSL 3.0.0: Don't call the password callback function a second time when
first call has signaled an error condition.

7
Modules/_ssl.c
View file

@ -3931,6 +3931,13 @@ _password_callback(char *buf, int size, int rwflag, void *userdata)
PySSL_END_ALLOW_THREADS_S(pw_info->thread_state);
if (pw_info->error) {
/* already failed previously. OpenSSL 3.0.0-alpha14 invokes the
* callback multiple times which can lead to fatal Python error in
* exception check. */
goto error;
}
if (pw_info->callable) {
fn_ret = _PyObject_CallNoArg(pw_info->callable);
if (!fn_ret) {