Importing Trusted Certificates Into Oracle Wallet

Download certificates to your computer as below (certificate_root and certificate_int)

Create an wallet via orapki

orapki wallet create -wallet <wallet_location> -pwd <password> -auto_login

Then add certificates into wallet.

orapki wallet add -wallet <wallet_location> -trusted_cert -cert "<wallet_location>/certificate_root.cer" -pwd <password>
orapki wallet add -wallet <wallet_location> -trusted_cert -cert "<wallet_location>/certificate_int.cer" -pwd <password>

Show ACLs

SQL> SELECT * FROM dba_network_acls ORDER BY acl;
SQL> SELECT * FROM dba_network_acl_privileges ORDER BY acl, aclid, privilege; 

Create an ACL from database and assign site address.

BEGIN
 SYS.dbms_network_acl_admin.create_acl(
   acl => '<ACL_NAME>',
   description => '<ACL DESCRIPTION>',
   principal => '<ORACLE_USER>',
   is_grant => TRUE,
   privilege => 'connect',
   start_date => null,
   end_date => null
 );
 SYS.DBMS_NETWORK_ACL_ADMIN.ADD_PRIVILEGE(
   acl => '<ACL_NAME>',
   principal => '<ORACLE_USER>',
   is_grant => true,
   privilege => 'connect'
 );
 SYS.DBMS_NETWORK_ACL_ADMIN.ADD_PRIVILEGE(
   acl => '<ACL_NAME>',
   principal => '<ORACLE_USER>',
   is_grant => true,
   privilege => 'resolve'
 );
 SYS.dbms_network_acl_admin.assign_acl(
   acl => '<ACL_NAME>',
   host => '*.emrahgumus.com',
   lower_port => null,
   upper_port => null
 );
END;
/

Then you can test via below code.

SET SERVEROUTPUT ON SIZE UNLIMITED;
DECLARE
  lo_req  UTL_HTTP.req;
  lo_resp  UTL_HTTP.resp;
BEGIN
  UTL_HTTP.SET_WALLET (
       'file:<wallet_location>',
       '<password>');
    lo_req := UTL_HTTP.begin_request ('https://www.emrahgumus.com');
    lo_resp := UTL_HTTP.get_response (lo_req);
    DBMS_OUTPUT.put_line (lo_resp.status_code);
    UTL_HTTP.end_response (lo_resp);
END;
/