openssl_decrypt

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

openssl_decryptDecrypts data

Descrizione

openssl_decrypt(
    string $data,
    string $cipher_algo,
    string $passphrase,
    int $options = 0,
    string $iv = "",
    ?string $tag = null,
    string $aad = ""
): string|false

Takes a raw or base64 encoded string and decrypts it using a given method and key.

Elenco dei parametri

data

The encrypted message to be decrypted.

cipher_algo

The cipher method. For a list of available cipher methods, use openssl_get_cipher_methods().

passphrase

The key.

options

options can be one of OPENSSL_RAW_DATA, OPENSSL_ZERO_PADDING.

iv

A non-NULL Initialization Vector.

tag

The authentication tag in AEAD cipher mode. If it is incorrect, the authentication fails and the function returns false.

Attenzione

The length of the tag is not checked by the function. It is the caller's responsibility to ensure that the length of the tag matches the length of the tag retrieved when openssl_encrypt() has been called. Otherwise the decryption may succeed if the given tag only matches the start of the proper tag.

aad

Additional authenticated data.

Valori restituiti

The decrypted string on success o false in caso di fallimento.

Errori/Eccezioni

Emits an E_WARNING level error if an unknown cipher algorithm is passed via the cipher_algo parameter.

Emits an E_WARNING level error if an empty value is passed in via the iv parameter.

Log delle modifiche

Versione Descrizione
8.1.0 tag is now nullable.
7.1.0 The tag and aad parameters were added.

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