https://www.php.net/manual/en/function.sodium-crypto-stream-xchacha20-keygen.php
PHP: sodium_crypto_stream_xchacha20_keygen - Manual
Returns a secure random key
phpsodiumcryptostreamkeygen
https://www.php.net/sodium-crypto-stream-xchacha20
PHP: sodium_crypto_stream_xchacha20 - Manual
Expands the key and nonce into a keystream of pseudorandom bytes
phpsodiumcryptostreammanual
https://mailarchive.ietf.org/arch/msg/cfrg/R2ceVw27v4bD__IVFpB4VXeMdQw/
[CFRG] [draft-irtf-cfrg-xchacha] Xchacha20 nonce wrap
Search IETF mail list archives
cfrgdraftirtfnoncewrap
https://docs.amd.com/r/2023.1-English/Vitis_Libraries/security/guide_L1/hw_api.html_41
xchacha20 - xchacha20 - 2023.1 English
english