Introduction

This documentation describes the cryptography API and the syscalls that can be invoked by an embedded app to Ledger devices operating system (BOLOS) to use basic arithmetic and cryptographic functions. It is basically divided into:

• Cryptography API which consists of signature algorithms, hash functions, message authentication codes and encryption algorithms
• Syscalls which enable computations for GF(p) and GF(2ⁿ) arithmetic and efficient implementation of elliptic curves.

Here is a non-exhaustive list of supported algorithms:

• AES and DES in different modes
• ECDSA with a random or deterministic nonce
• EDDSA
• ECDH
• Schnorr signature with different implementations, especially the one used for Zilliqa and BIP-0340
• Multiple hash functions from SHA-2 and SHA-3 families as well as extendable output functions (SHAKE-128 and SHAKE-256)
• GROESTL and RIPEMD-160
• Keyed-hash Message Authentication Code

On the next page, you will find the files list as represented in the Ledger devices SDKs. It is your entrypoint to all the Cryptography API and the syscalls.

If you need examples about how to use the functions, read this page.

---

Did you find this page helpful?

How would you improve this page for developers?

I am a developer.
Contributors will be chosen randomly to receive rewards. Check this box to send your email and participate.

Ledger collects your email address to send you rewards for your contribution to improve the Developer Portal documentation. Learn more about how we manage your data and your rights.

By providing your email address, you consent that Ledger may contact you for rewards delivery purposes. If you are part of the randomly selected contributors, we will send you an email to ask for your physical address and if necessary, ask you for additional information on the suggestion you made. Your information will only be available to Ledger and will be retained for no longer than 90 days. It may be transferred to non-European countries that ensure an adequate level of protection or under the standard contractual clauses adopted by the EU Commission.

Please note that you may withdraw your consent at any time, access your data and request their rectification or deletion. You may also request the limitation of the processing of your data. To exercise your rights or for any question on the processing of your data, please contact LEDGER’s Data Protection Officer here. If nevertheless you believe LEDGER did not adequately address your concerns and mishandled your data, you may lodge a complaint with the personal data protection authority of your country.

Warranty and liability

← Previous

File list

Next →