MDEV-26647 (reuse info) Include password validation plugin information in the error message if the SQL statement is not satisfied password policy

send information about password reusing

Author: sanja-byelkin

mysql-test/suite/plugins/r/password_reuse_check.result

@@ -10,11 +10,13 @@ grant select on *.* to user_name@localhost identified by 'test_pwd';
 ERROR HY000: Your password does not satisfy the current policy requirements
 show warnings;
 Level	Code	Message
+Warning	1819	password_reuse_check: The password was already used
 Error	1819	Your password does not satisfy the current policy requirements
 alter user user_name@localhost identified by 'test_pwd';
 ERROR HY000: Operation ALTER USER failed for 'user_name'@'localhost'
 show warnings;
 Level	Code	Message
+Warning	1819	password_reuse_check: The password was already used
 Error	1819	Your password does not satisfy the current policy requirements
 Error	1396	Operation ALTER USER failed for 'user_name'@'localhost'
 # check exparation
@@ -23,6 +25,7 @@ alter user user_name@localhost identified by 'test_pwd';
 ERROR HY000: Operation ALTER USER failed for 'user_name'@'localhost'
 show warnings;
 Level	Code	Message
+Warning	1819	password_reuse_check: The password was already used
 Error	1819	Your password does not satisfy the current policy requirements
 Error	1396	Operation ALTER USER failed for 'user_name'@'localhost'
 select hex(hash) from mysql.password_reuse_check_history;

plugin/password_reuse_check/password_reuse_check.c

@@ -108,9 +108,17 @@ static int run_query_with_table_creation(MYSQL *mysql, const char *query,
     unsigned int rc= mysql_errno(mysql);
     if (rc != ER_NO_SUCH_TABLE)
     {
-      // suppress this error in case of try to add the same password twice
       if (rc != ER_DUP_ENTRY)
+      {
         report_sql_error(mysql);
+      }
+      else
+      {
+        // warning used to do not change error code
+        my_printf_error(ER_NOT_VALID_PASSWORD,
+                        "password_reuse_check: The password was already used",
+                        ME_WARNING);
+      }
       return 1;
     }
     if (create_table(mysql))