OpenSSL 3.0 warnings

[carun]

Hey folks,

I'm trying to build librdkafka 1.9.0 on Ubuntu 22.04 and I see these deprecation warnings. Has anyone faced the same before? Is this being worked on?

$ ninja
[46/88] Building C object src/CMakeFiles/rdkafka.dir/rdkafka_cert.c.o
/home/arun/build/librdkafka-1.9.0/src/rdkafka_cert.c: In function ‘rd_kafka_print_ssl_errors’:
/home/arun/build/librdkafka-1.9.0/src/rdkafka_cert.c:106:9: warning: ‘ERR_get_error_line_data’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  106 |         while ((l = ERR_get_error_line_data(&file, &line, &data, &flags)) !=
      |         ^~~~~
In file included from /usr/include/openssl/engine.h:31,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_cert.c:35:
/usr/include/openssl/err.h:413:15: note: declared here
  413 | unsigned long ERR_get_error_line_data(const char **file, int *line,
      |               ^~~~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_cert.c:115:24: warning: ‘ERR_func_error_string’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  115 |                        ERR_lib_error_string(l), ERR_func_error_string(l), file,
      |                        ^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/openssl/engine.h:31,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_cert.c:35:
/usr/include/openssl/err.h:447:35: note: declared here
  447 | OSSL_DEPRECATEDIN_3_0 const char *ERR_func_error_string(unsigned long e);
      |                                   ^~~~~~~~~~~~~~~~~~~~~
[65/88] Building C object src/CMakeFiles/rdkafka.dir/rdkafka_ssl.c.o
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c: In function ‘rd_kafka_ssl_last_error_str’:
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:108:9: warning: ‘ERR_peek_last_error_line_data’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  108 |         l = ERR_peek_last_error_line_data(&file, &line, &data, &flags);
      |         ^
In file included from /usr/include/openssl/engine.h:31,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/err.h:437:15: note: declared here
  437 | unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:112:9: warning: ‘ERR_func_error_string’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  112 |         rd_snprintf(errstr, sizeof(errstr), "%lu:%s:%s:%s:%d: %s", l,
      |         ^~~~~~~~~~~
In file included from /usr/include/openssl/engine.h:31,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/err.h:447:35: note: declared here
  447 | OSSL_DEPRECATEDIN_3_0 const char *ERR_func_error_string(unsigned long e);
      |                                   ^~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c: In function ‘rd_kafka_ssl_error’:
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:143:9: warning: ‘ERR_get_error_line_data’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  143 |         while ((l = ERR_get_error_line_data(&file, &line, &data, &flags)) !=
      |         ^~~~~
In file included from /usr/include/openssl/engine.h:31,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/err.h:413:15: note: declared here
  413 | unsigned long ERR_get_error_line_data(const char **file, int *line,
      |               ^~~~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c: In function ‘rd_kafka_ssl_set_certs’:
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1337:17: warning: ‘ENGINE_load_ssl_client_cert’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1337 |                 r    = ENGINE_load_ssl_client_cert(
      |                 ^
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:644:5: note: declared here
  644 | int ENGINE_load_ssl_client_cert(ENGINE *e, SSL *s, STACK_OF(X509_NAME) *ca_dn,
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c: In function ‘rd_kafka_ssl_ctx_term’:
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1407:9: warning: ‘ENGINE_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1407 |         RD_IF_FREE(rk->rk_conf.ssl.engine, ENGINE_free);
      |         ^~~~~~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:493:27: note: declared here
  493 | OSSL_DEPRECATEDIN_3_0 int ENGINE_free(ENGINE *e);
      |                           ^~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c: In function ‘rd_kafka_ssl_ctx_init_engine’:
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1427:9: warning: ‘ENGINE_by_id’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1427 |         engine = ENGINE_by_id(rk->rk_conf.ssl.engine_id);
      |         ^~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:336:31: note: declared here
  336 | OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_by_id(const char *id);
      |                               ^~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1429:17: warning: ‘ENGINE_by_id’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1429 |                 engine = ENGINE_by_id("dynamic");
      |                 ^~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:336:31: note: declared here
  336 | OSSL_DEPRECATEDIN_3_0 ENGINE *ENGINE_by_id(const char *id);
      |                               ^~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1438:9: warning: ‘ENGINE_ctrl_cmd_string’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1438 |         if (!ENGINE_ctrl_cmd_string(engine, "SO_PATH",
      |         ^~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:479:5: note: declared here
  479 | int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
      |     ^~~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1440:17: warning: ‘ENGINE_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1440 |                 ENGINE_free(engine);
      |                 ^~~~~~~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:493:27: note: declared here
  493 | OSSL_DEPRECATEDIN_3_0 int ENGINE_free(ENGINE *e);
      |                           ^~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1447:9: warning: ‘ENGINE_ctrl_cmd_string’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1447 |         if (!ENGINE_ctrl_cmd_string(engine, "LIST_ADD", "1", 0)) {
      |         ^~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:479:5: note: declared here
  479 | int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
      |     ^~~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1448:17: warning: ‘ENGINE_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1448 |                 ENGINE_free(engine);
      |                 ^~~~~~~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:493:27: note: declared here
  493 | OSSL_DEPRECATEDIN_3_0 int ENGINE_free(ENGINE *e);
      |                           ^~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1455:9: warning: ‘ENGINE_ctrl_cmd_string’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1455 |         if (!ENGINE_ctrl_cmd_string(engine, "LOAD", NULL, 0)) {
      |         ^~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:479:5: note: declared here
  479 | int ENGINE_ctrl_cmd_string(ENGINE *e, const char *cmd_name, const char *arg,
      |     ^~~~~~~~~~~~~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1456:17: warning: ‘ENGINE_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1456 |                 ENGINE_free(engine);
      |                 ^~~~~~~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:493:27: note: declared here
  493 | OSSL_DEPRECATEDIN_3_0 int ENGINE_free(ENGINE *e);
      |                           ^~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1463:9: warning: ‘ENGINE_init’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1463 |         if (!ENGINE_init(engine)) {
      |         ^~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:620:27: note: declared here
  620 | OSSL_DEPRECATEDIN_3_0 int ENGINE_init(ENGINE *e);
      |                           ^~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1464:17: warning: ‘ENGINE_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1464 |                 ENGINE_free(engine);
      |                 ^~~~~~~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:493:27: note: declared here
  493 | OSSL_DEPRECATEDIN_3_0 int ENGINE_free(ENGINE *e);
      |                           ^~~~~~~~~~~
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c: In function ‘rd_kafka_ssl_ctx_init’:
/home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:1607:9: warning: ‘ENGINE_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
 1607 |         RD_IF_FREE(rk->rk_conf.ssl.engine, ENGINE_free);
      |         ^~~~~~~~~~
In file included from /home/arun/build/librdkafka-1.9.0/src/rdkafka_conf.h:36,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_int.h:91,
                 from /home/arun/build/librdkafka-1.9.0/src/rdkafka_ssl.c:35:
/usr/include/openssl/engine.h:493:27: note: declared here
  493 | OSSL_DEPRECATEDIN_3_0 int ENGINE_free(ENGINE *e);
      |                           ^~~~~~~~~~~
[88/88] Linking CXX static library src-cpp/librdkafka++.a

[denis-rossati]

Same here. I don't know how to proceed, but is a impeditive to use it in my projects...