CRYPTOFLEX-TOOL(1)

📦
version 0.27.1 · 17 versions
, in fedora 43, fedora 44

💖 CRYPTOFLEX-TOOL 💖

okay so bestie, welcome to the cryptoflex-tool page, straight outta the OpenSC Tools manual section 🎀 this one's a lil utility and it's lowkey iconic, let's get into it ✨

✨ NAME ✨

cryptoflex-tool — utility for manipulating Schlumberger Cryptoflex data structures 🦋

🌸 SYNOPSIS 🌸

cryptoflex-tool [OPTIONS]

💅 DESCRIPTION 💅

so cryptoflex-tool is the girl that manipulates PKCS data structures on Schlumberger Cryptoflex smart cards 💳✨ like, you can create, list and read PINs and keys that live on the smart card. and for the operations that need it, user PIN authentication gets performed, no cap 🔐

👑 OPTIONS 👑

  • --app-df num, -a num — tells it which DF to operate in 📂
  • --create-key-files arg, -c arg — creates brand new RSA key files for arg keys 🔑
  • --create-pin-files id, -P id — creates a new PIN file for CHVid 📌
  • --exponent exp, -e exp — specifies the RSA exponent, exp, to use when generating keys. the default value is 3 ✨
  • --generate-key, -g — generate a new RSA key pair, periodt 💫
  • --key-num num, -k num — specifies the key number to operate on. the default is key number 1 🥇
  • --list-keys, -l — lists all keys stored in a public key file 📋
  • --modulus-length length, -m length — specifies the modulus length to use in key generation. the default value is 1024 📏
  • --prkey-file id, -p id — specifies the private key file id, id, to use 🙈
  • --pubkey-file id, -u id — specifies the public key file id, id, to use 🫶
  • --read-key, -R — reads a public key from the card, letting you extract and store or use the public key 👀
  • --reader arg, -r arg — the number of the reader to use. by default, the first reader with a present card is used. if arg is an ATR, the reader with a matching card will be chosen 🎯
  • --verbose, -v — makes cryptoflex-tool more verbose. specify this flag several times to enable debug output in the opensc library 🗣️
  • --verify-pin, -V — verifies CHV1 before issuing commands ✅
  • --wait, -w — makes cryptoflex-tool wait for a card insertion ⏳

🌈 SEE ALSO 🌈

pkcs15-tool(1) 💜

🎀 AUTHORS 🎀

cryptoflex-tool was written by Juha Yrjölä <juha.yrjola@iki.fi> 🫶

and that's the whole vibe bestie 💖 this lil gem is from the opensc source, version dated 04/19/2026, and yeah, it's literally titled CRYPTOFLEX-TOOL(1) ✨ go forth and slay those smart card data structures 👑💅

📦 where this page comes from