gh-127330: Update for OpenSSL 3.4 & document+improve the update process (GH-127331)

- Add `git describe` output to headers generated by `make_ssl_data.py`

  This info is more important than the date when the file was generated.
  It does mean that the tool now requires a Git checkout of OpenSSL,
  not for example a release tarball.

- Regenerate the older file to add the info.
  To the other older file, add a note about manual edits.

- Add notes on how to add a new OpenSSL version

- Add 3.4 error messages and multissl tests

Author: encukou

.github/workflows/build.yml

@@ -250,7 +250,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-24.04]
-        openssl_ver: [3.0.15, 3.1.7, 3.2.3, 3.3.2]
+        openssl_ver: [3.0.15, 3.1.7, 3.2.3, 3.3.2, 3.4.0]
+        # See Tools/ssl/make_ssl_data.py for notes on adding a new version
     env:
       OPENSSL_VER: ${{ matrix.openssl_ver }}
       MULTISSL_DIR: ${{ github.workspace }}/multissl

Misc/NEWS.d/next/Library/2024-11-27-14-23-02.gh-issue-127331.9sNEC9.rst

@@ -0,0 +1 @@
+:mod:`ssl` can show descriptions for errors added in OpenSSL 3.4.

Modules/_ssl.c

@@ -120,8 +120,9 @@ static void _PySSLFixErrno(void) {
 #endif
 
 /* Include generated data (error codes) */
+/* See make_ssl_data.h for notes on adding a new version. */
 #if (OPENSSL_VERSION_NUMBER >= 0x30100000L)
-#include "_ssl_data_31.h"
+#include "_ssl_data_34.h"
 #elif (OPENSSL_VERSION_NUMBER >= 0x30000000L)
 #include "_ssl_data_300.h"
 #elif (OPENSSL_VERSION_NUMBER >= 0x10101000L)

Modules/_ssl_data_111.h

@@ -1,4 +1,6 @@
-/* File generated by Tools/ssl/make_ssl_data.py *//* Generated on 2023-06-01T02:58:04.081473 */
+/* File generated by Tools/ssl/make_ssl_data.py */
+/* Generated on 2024-11-27T12:48:46.194048+00:00 */
+/* Generated from Git commit OpenSSL_1_1_1w-0-ge04bd3433f */
 static struct py_ssl_library_code library_codes[] = {
 #ifdef ERR_LIB_ASN1
     {"ASN1", ERR_LIB_ASN1},

Modules/_ssl_data_300.h

@@ -1,4 +1,7 @@
-/* File generated by Tools/ssl/make_ssl_data.py *//* Generated on 2023-06-01T03:03:52.163218 */
+/* File generated by Tools/ssl/make_ssl_data.py */
+/* Generated on 2023-06-01T03:03:52.163218 */
+/* Manually edited to add definitions from 1.1.1 (GH-105174) */
+
 static struct py_ssl_library_code library_codes[] = {
 #ifdef ERR_LIB_ASN1
     {"ASN1", ERR_LIB_ASN1},