openssl-rsautl(1ssl) on Linux
The text 64a3febe107a, as Debian 10 (Buster) shipped it.
RSA utility
Flags it lists
-
-asn1parse -
-certin -
-decrypt -
-encrypt -
-help -
-hexdump -
-in -
-inkey -
-keyform -
-oaep -
-out -
-pkcs -
-pubin -
-rand -
-raw -
-sign -
-ssl -
-verify