openssl_pkcs7_decrypt

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

    openssl_pkcs7_decrypt — Decrypts an S/MIME encrypted message

    Description

    openssl_pkcs7_decrypt(
        string$input_filename,
        string$output_filename,
        OpenSSLCertificate|string$certificate,
        OpenSSLAsymmetricKey|OpenSSLCertificate|array|string|null$private_key = null
    ): bool

    Decrypts the S/MIME encrypted message contained in the file specified by input_filename using the certificate and its associated private key specified by certificate and private_key.

    Parameters

    input_filename

    output_filename

    The decrypted message is written to the file specified by output_filename.

    certificate

    private_key

    Return Values

    Returns true on success or false on failure.

    Changelog

    VersionDescription
    8.0.0private_key accepts an OpenSSLAsymmetricKey or OpenSSLCertificate instance now; previously, a resource of type OpenSSL key or OpenSSL X.509 CSR was accepted.

    Examples

    Example #1 openssl_pkcs7_decrypt() example

    <?php
    // $cert and $key are assumed to contain your personal certificate and private
    // key pair, and that you are the recipient of an S/MIME message
    $infilename = "encrypted.msg"; // this file holds your encrypted message
    $outfilename = "decrypted.msg"; // make sure you can write to this file

    if (openssl_pkcs7_decrypt($infilename, $outfilename, $cert, $key)) {
    echo     "decrypted!";
    } else {
    echo     "failed to decrypt!";
    }
    ?>
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