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(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_aead_aes256gcm_decrypt — Verify then decrypt a message with AES-256-GCM
$ciphertext,$additional_data,$nonce,$key
Verify then decrypt with AES-256-GCM.
Only available if sodium_crypto_aead_aes256gcm_is_available() returns true.
ciphertext
Must be in the format provided by sodium_crypto_aead_aes256gcm_encrypt() (ciphertext and tag, concatenated).
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. 12 bytes long.
key
Encryption key (256-bit).
Returns the plaintext on success, 或者在失败时返回 false.
