sodium_crypto_aead_chacha20poly1305_ietf_decrypt

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_chacha20poly1305_ietf_decryptVerify that the ciphertext includes a valid tag

Descrição

sodium_crypto_aead_chacha20poly1305_ietf_decrypt(
    string $ciphertext,
    string $additional_data,
    string $nonce,
    string $key
): string|false

Verify then decrypt with ChaCha20-Poly1305 (IETF variant).

The IETF variant uses 96-bit nonces and 32-bit internal counters, instead of 64-bit for both.

Parâmetros

ciphertext

Must be in the format provided by sodium_crypto_aead_chacha20poly1305_ietf_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).

Valor Retornado

Returns the plaintext on success, ou false em caso de falha.

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joy at codilar dot com
2 years ago
sodium_crypto_aead_chacha20poly1305_ietf_decrypt function mentions in its documentation that it'll always return a string. But when passed a malformed input as argument, it returns a boolean
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