We have our own interface for working with the device and API for generating a signature - PKCS # 11 library. The source codes of demo applications are available on github:

• Rutoken Demobank

  Android 5+	https://github.com/AktivCo/rutoken-demobank-android
  iOS 13+	https://github.com/AktivCo/rutoken-demobank-ios

• Rutoken Demoshit

  Android 5+	https://github.com/AktivCo/rutoken-demoshift-android
  iOS 13+	https://github.com/AktivCo/rutoken-demoshift-ios

Please note that all the samples use Russian crypto algorithms.

To implement RSA and ECDSA you need Rutoken SDK with API https://download.rutoken.ru/Rutoken/SDK/rutoken-sdk-latest.zip

RSA and ECDSA methods are in a folder /SDK/pkcs11/samples/Standard/.

Some details:

• RSA
  • CreateRSA – creating method
  • EncDecRSA – encrypt/decrypt
  • SignRSAwithHash - calculation / verification of digital signature on RSA keys
  • SigVerUpdateRSAWithHash - streaming computation / verification of digital signature on RSA keys
  • SigVerRSA – signature verification
  • DeleteRSA – deleting method
• ECDSA
  • CreateECDSA – creating method
  • EncDecECDSA – encrypt/decrypt
  • SigVerECDSA – signature verification
  • DeleteECDSA – deleting method
• Storage of custom data
  • CreateDataObject – write data
  • FindDataObject – find and read data
  • DeleteDataObject – delete data