Sign a file

说明

openssl_cms_sign(
    string $input_filename,
    string $output_filename,
    OpenSSLCertificate|string $certificate,
    OpenSSLAsymmetricKey|OpenSSLCertificate|array|string $private_key,
    ?array $headers,
    int $flags = 0,
    int $encoding = OPENSSL_ENCODING_SMIME,
    ?string $untrusted_certificates_filename = null
): bool

This function signs a file with an X.509 certificate and key.

参数

input_filename: The name of the file to be signed.
output_filename: The name of the file to deposit the results.
certificate: The name of the file containing the signing certificate.
private_key: The name of file containing the key associated with certificate.
headers: An array of headers to be included in S/MIME output.
flags: Flags to be passed to cms_sign().
encoding: The encoding of the output file. One of OPENSSL_CMS_SMIME, OPENSLL_CMS_DER or OPENSSL_CMS_PEM.
untrusted_certificates_filename: Intermediate certificates to be included in the signature.

返回值

成功时返回 true，或者在失败时返回 false。