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(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_kdf_derive_from_key — Derive a subkey
$subkey_length,$subkey_id,$context,$keyDerive a subkey from a root key and additional context.
Similar to hash_hkdf().
subkey_length
Length of the key to return (in bytes)
subkey_id
Return the Nth subkey from a given root key. Useful for seeking.
context
Application-specific context.
key
The root key from which the subkey is derived.
A string of pseudorandom (raw binary) bytes.
