# sodium_crypto_aead_aegis256_decrypt

(PHP 8 >= 8.4.0)

sodium_crypto_aead_aegis256_decrypt — Verify then decrypt a message with AEGIS-256

### 说明

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.

### 参数

`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).

### 返回值

Returns the plaintext on success, 或者在失败时返回 `false`.

### 参见

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

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