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<sodium_crypto_aead_aes256gcm_is_availablesodium_crypto_aead_chacha20poly1305_decrypt>
^Sodium FunctionsLast updated: Mon, 26 Oct 2026

sodium_crypto_aead_aes256gcm_keygen

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_aes256gcm_keygen — Generate a random AES-256-GCM key

Description

function sodium_crypto_aead_aes256gcm_keygen(): string

Generate a random key for use with sodium_crypto_aead_aes256gcm_encrypt() and sodium_crypto_aead_aes256gcm_decrypt().

Parameters

This function has no parameters.

Return Values

Returns a 256-bit random key.

Changelog

Version Description
8.4.0 This function is now also defined on aarch64. Previously it was only defined on x86 and x86_64.

<sodium_crypto_aead_aes256gcm_is_availablesodium_crypto_aead_chacha20poly1305_decrypt>
^Sodium FunctionsLast updated: Mon, 26 Oct 2026