(PHP 8)
openssl_cms_sign — Sign a file
$input_filename
,$output_filename
,$certificate
,$private_key
,$headers
,$flags
= 0,$encoding
= OPENSSL_ENCODING_SMIME
,$untrusted_certificates_filename
= null
This function signs a file with an X.509 certificate and key.
input_filename
The name of the file to be signed.
output_filename
The name of the file to deposit the results.
certificate
The signing certificate. See Key/Certificate parameters for a list of valid values.
private_key
The key associated with certificate
.
See Key/Certificate parameters for a list of valid values.
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_ENCODING_SMIME
,
OPENSSL_ENCODING_DER
or OPENSSL_ENCODING_PEM
.
untrusted_certificates_filename
Intermediate certificates to be included in the signature.
Returns true
on success or false
on failure.
Example #1 openssl_cms_sign() example
<?php
openssl_cms_sign('input.txt', 'output.txt', 'file://cert.pem', 'file://privkey.pem', null, OPENSSL_CMS_BINARY, OPENSSL_ENCODING_DER, 'chain.pem');
?>