fix(broker/lua): Several fix in the lua Stream

* Legacy OpenSSL md5 function replaced by the OpenSSL 3 version
* improvement of hostgroups cache in streamconnector
* improvement of servicegroups cache in streamconnector

REFS: MON-34072 MON-15480

Author: bouda1

broker/lua/inc/com/centreon/broker/lua/macro_cache.hh

@@ -27,6 +27,7 @@
 #include "com/centreon/broker/neb/host_group.hh"
 #include "com/centreon/broker/neb/host_group_member.hh"
 #include "com/centreon/broker/neb/instance.hh"
+#include "com/centreon/broker/neb/internal.hh"
 #include "com/centreon/broker/neb/service.hh"
 #include "com/centreon/broker/neb/service_group.hh"
 #include "com/centreon/broker/neb/service_group_member.hh"
@@ -42,14 +43,26 @@ class macro_cache {
   std::shared_ptr<persistent_cache> _cache;
   absl::flat_hash_map<uint64_t, std::shared_ptr<io::data>> _instances;
   absl::flat_hash_map<uint64_t, std::shared_ptr<io::data>> _hosts;
-  absl::flat_hash_map<uint64_t, std::shared_ptr<io::data>> _host_groups;
+  /* The host groups cache stores also a set with the pollers telling they need
+   * the cache. So if no more poller needs a host group, we can remove it from
+   * the cache. */
+  absl::flat_hash_map<uint64_t,
+                      std::pair<std::shared_ptr<neb::pb_host_group>,
+                                absl::flat_hash_set<uint32_t>>>
+      _host_groups;
   absl::btree_map<std::pair<uint64_t, uint64_t>, std::shared_ptr<io::data>>
       _host_group_members;
   absl::flat_hash_map<std::pair<uint64_t, uint64_t>, std::shared_ptr<io::data>>
       _custom_vars;
   absl::flat_hash_map<std::pair<uint64_t, uint64_t>, std::shared_ptr<io::data>>
       _services;
-  absl::flat_hash_map<uint64_t, std::shared_ptr<io::data>> _service_groups;
+  /* The service groups cache stores also a set with the pollers telling they
+   * need the cache. So if no more poller needs a service group, we can remove
+   * it from the cache. */
+  absl::flat_hash_map<uint64_t,
+                      std::pair<std::shared_ptr<neb::pb_service_group>,
+                                absl::flat_hash_set<uint32_t>>>
+      _service_groups;
   absl::btree_map<std::tuple<uint64_t, uint64_t, uint64_t>,
                   std::shared_ptr<io::data>>
       _service_group_members;

broker/lua/src/broker_utils.cc

@@ -24,7 +24,7 @@
 #include "absl/strings/string_view.h"
 #include "com/centreon/broker/config/applier/state.hh"
 
-#include <openssl/md5.h>
+#include <openssl/evp.h>
 #include <cstdlib>
 #include <cstring>
 #include <iomanip>
@@ -810,6 +810,34 @@ static int l_broker_stat(lua_State* L) {
   }
 }
 
+static void md5_message(const unsigned char* message,
+                        size_t message_len,
+                        unsigned char** digest,
+                        unsigned int* digest_len) {
+  EVP_MD_CTX* mdctx;
+  auto handle_error = [](const std::string& msg) {
+    auto logger = log_v2::instance().get(log_v2::LUA);
+    logger->error(msg);
+  };
+  if ((mdctx = EVP_MD_CTX_new()) == nullptr) {
+    handle_error("lua: fail to call MD5 (EVP_MD_CTX_new call)");
+  }
+  if (1 != EVP_DigestInit_ex(mdctx, EVP_md5(), nullptr)) {
+    handle_error("lua: fail to call MD5 (EVP_DigestInit_ex call)");
+  }
+  if (1 != EVP_DigestUpdate(mdctx, message, message_len)) {
+    handle_error("lua: fail to call MD5 (EVP_DigestUpdate call)");
+  }
+  if ((*digest = (unsigned char*)OPENSSL_malloc(EVP_MD_size(EVP_md5()))) ==
+      nullptr) {
+    handle_error("lua: fail to call MD5 (OPENSSL_malloc call)");
+  }
+  if (1 != EVP_DigestFinal_ex(mdctx, *digest, digest_len)) {
+    handle_error("lua: fail to call MD5 (EVP_DigestFinal_ex call)");
+  }
+  EVP_MD_CTX_free(mdctx);
+}
+
 static int l_broker_md5(lua_State* L) {
   auto digit = [](unsigned char d) -> char {
     if (d < 10)
@@ -820,11 +848,12 @@ static int l_broker_md5(lua_State* L) {
   size_t len;
   const unsigned char* str =
       reinterpret_cast<const unsigned char*>(lua_tolstring(L, -1, &len));
-  unsigned char md5[MD5_DIGEST_LENGTH];
-  MD5(str, len, md5);
-  char result[2 * MD5_DIGEST_LENGTH + 1];
+  unsigned char* md5;
+  uint32_t md5_len;
+  md5_message(str, len, &md5, &md5_len);
+  char result[2 * md5_len + 1];
   char* tmp = result;
-  for (int i = 0; i < MD5_DIGEST_LENGTH; i++) {
+  for (uint32_t i = 0; i < md5_len; i++) {
     *tmp = digit(md5[i] >> 4);
     ++tmp;
     *tmp = digit(md5[i] & 0xf);