openssl_public_encrypt

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

openssl_public_encrypt — Encrypts data with public key

Description

openssl_public_encrypt(
    string $data,
    string &$encrypted_data,
    OpenSSLAsymmetricKey|OpenSSLCertificate|array|string $public_key,
    int $padding = OPENSSL_PKCS1_PADDING
): bool

openssl_public_encrypt() encrypts data with public public_key and stores the result into encrypted_data. Encrypted data can be decrypted via openssl_private_decrypt().

This function can be used e.g. to encrypt message which can be then read only by owner of the private key. It can be also used to store secure data in database.

Parameters

data
encrypted_data: This will hold the result of the encryption.
public_key: The public key.
padding: padding can be one of OPENSSL_PKCS1_PADDING, OPENSSL_SSLV23_PADDING, OPENSSL_PKCS1_OAEP_PADDING, OPENSSL_NO_PADDING.

Return Values

Returns true on success or false on failure.

Changelog

Version	Description
8.0.0	`public_key` accepts an OpenSSLAsymmetricKey or OpenSSLCertificate instance now; previously, a resource of type `OpenSSL key` or `OpenSSL X.509` was accepted.