sodium_crypto_kdf_derive_from_key
(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_kdf_derive_from_key — Derive a subkey
说明
sodium_crypto_kdf_derive_from_key(
int
int
string
#[\SensitiveParameter] string
): string
int
$subkey_length,int
$subkey_id,string
$context,#[\SensitiveParameter] string
$key): string
Derive a subkey from a root key and additional context.
Similar to hash_hkdf().
参数
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.
返回值
A string of pseudorandom (raw binary) bytes.
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备份地址：http://www.lvesu.com/blog/php/function.sodium-crypto-kdf-derive-from-key.php