This is the command ecdsasign that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
ecdsasign - ECDSA document signing
ecdsasign document.txt < filewithsecret [-s] [-p] [-h]
ecdsautils reads the secret from stdin and signs a single document passed as an argument.
The document is changed in that the signature is added at the bottom of the file,
separated by a dashed line. Multiple individuals can sign a single document. display this
short help and exit
Use ecdsasign online using onworks.net services