Please consider adding the OpenTSA patches (from http://www.opentsa.org/) into the ebuild for OpenSSL... the patches add time stamp facilities into openssl... If these patches are included, maybe a USE flag (e.g. "ts") be made available to include/exclude the patches (since its only of use to people wanting timestamping).
not at this time better to just get it integrated into the official openssl codebase