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sodium_crypto_aead_aegis128l_keygen	sodium_crypto_aead_aegis256_encrypt

Sodium Functions	Last updated: Mon, 26 Oct 2026

sodium_crypto_aead_aegis256_decrypt

(PHP 8 >= 8.4.0)

sodium_crypto_aead_aegis256_decrypt — Verify then decrypt a message with AEGIS-256

Description

function sodium_crypto_aead_aegis256_decrypt(
    string $ciphertext,
    string $additional_data,
    string $nonce,
    #[\SensitiveParameter] string $key
): string|false

Verify then decrypt a message with AEGIS-256.

Parameters

ciphertext: Must be in the format provided by sodium_crypto_aead_aegis256_encrypt().
additional_data: Additional, authenticated data. This is used in the verification of the authentication tag appended to the ciphertext, but it is not encrypted or stored in the ciphertext.
nonce: A number that must be only used once, per message.
key: Encryption key (256-bit).

Return Values

Returns the plaintext on success, or false on failure.

See Also

sodium_crypto_aead_aegis256_encrypt() - Encrypt then authenticate a message with AEGIS-256
sodium_crypto_aead_aegis256_keygen() - Generate a random AEGIS-256 key

sodium_crypto_aead_aegis128l_keygen	sodium_crypto_aead_aegis256_encrypt

Sodium Functions	Last updated: Mon, 26 Oct 2026