sodium_crypto_aead_aes256gcm_decrypt
PHP 7 >= 7.2.0, PHP 8
sodium_crypto_aead_aes256gcm_decrypt - Verify then decrypt a message with AES-256-GCM
Manual
sodium_crypto_aead_aes256gcm_decrypt(
string$ciphertext,
string$additional_data,
string$nonce,
string$key
): string|false
string$ciphertext,
string$additional_data,
string$nonce,
string$key
): string|false
Verify then decrypt with AES-256-GCM. Only available if sodium_crypto_aead_aes256gcm_is_available returns true.
Parameters
- 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).
Return Values
Returns the plaintext on success, or false on failure.