Oracle Database B10772-01 Administrator's Manual page 428

orapki Utility Commands Summary
Syntax
To export a certificate from an Oracle wallet:
orapki wallet export -wallet <wallet_location> -dn <certificate_dn> -cert
<certificate_filename>
To export a certificate request from an Oracle wallet:
orapki wallet export -wallet <wallet_location> -dn <certificate_request_dn>
-request <certificate_request_filename>
E-14 Oracle Database Advanced Security Administrator's Guide
The -wallet parameter specifies the location of the wallet from which you
want to export the certificate.
The -dn parameter specifies the distinguished name of the certificate.
The -cert parameter specifies the name of the file that contains the exported
certificate.
The -request parameter specifies the name of the file that contains the
exported certificate request.