SWI-Prolog -- ed25519_seed

Documentation
- Reference manual
- Packages
  - SWI-Prolog SSL Interface
    - library(crypto): Cryptography and authentication library
      - Digital signatures
        
        Ed25519
        
        ed25519_new_keypair/1
        
        ed25519_seed_keypair/2
        
        ed25519_keypair_public_key/2
        
        ed25519_sign/4
        
        ed25519_verify/4

Availability::- use_module(library(crypto)).(can be autoloaded)

[det]ed25519_seed_keypair(+Seed, -KeyPair)

Deterministically derive an Ed25519 key pair from Seed, 32 arbitrary bytes. Seed can be chosen at random using crypto_n_random_bytes/2 or derived from input keying material using crypto_data_hkdf/4.

KeyPair is a hexadecimal atom denoting the key pair in PKCS#8 v2 format (RFC 5958, RFC 8410), the format also used by openssl genpkey -algorithm ed25519. It contains the private key and must be kept absolutely secret. It can be used for signing with ed25519_sign/4, and its public key is obtained with ed25519_keypair_public_key/2.

History

Introduced in 10.1.12 (👉8100e85) #156 Ed25519 signatures and X25519 key exchange