If your certificate is not password-protected, just use null or a blank string. Otherwise, this function won't work.
(PHP 5 >= 5.2.2, PHP 7, PHP 8)
openssl_pkcs12_export — Exports a PKCS#12 Compatible Certificate Store File to variable
$certificate,&$output,$private_key,$passphrase,$options = []
openssl_pkcs12_export() stores
certificate into a string named by
output in a PKCS#12 file format.
x509See Key/Certificate parameters for a list of valid values.
outputOn success, this will hold the PKCS#12.
private_keyPrivate key component of PKCS#12 file. See Public/Private Key parameters for a list of valid values.
passphraseEncryption password for unlocking the PKCS#12 file.
optionsOptional array, other keys will be ignored.
| Key | Description |
|---|---|
"extracerts" |
array of extra certificates or a single certificate to be included in the PKCS#12 file. |
"friendly_name" |
string to be used for the supplied certificate and key |
| Version | Description |
|---|---|
| 8.0.0 |
certificate accepts an OpenSSLCertificate instance now;
previously, a resource of type OpenSSL X.509 CSR was accepted.
|
| 8.0.0 |
private_key accepts an OpenSSLAsymmetricKey
or OpenSSLCertificate instance now;
previously, a resource of type OpenSSL key or OpenSSL X.509
was accepted.
|
If your certificate is not password-protected, just use null or a blank string. Otherwise, this function won't work.If you need to provide multiple additional certificates, the 'extracerts' argument needs to be an array with one certificate per element:<?php$args = array( 'extracerts' => array( 0 => '-----BEGIN CERTIFICATE----- cert1 ...', 1 => '-----BEGIN CERTIFICATE----- cert2 ...', // ... ) );?>You can use this to prepare a PEM.<?php$pemChain = '...';preg_match_all('/(-----BEGIN CERTIFICATE-----.*?-----END CERTIFICATE-----)/si', $pemChain, $matches);$args = array('extracerts' => $matches[0]);openssl_pkcs12_export($signed_csr, $cerificate_out, $private_key_resource, $passphrase, $args);?>in order to export a private key to pkcs12 format, the input certificate must contain both private and associated public key in PEM format , -----BEGIN RSA PRIVATE KEY----------END RSA PRIVATE KEY----------BEGIN CERTIFICATE----------END CERTIFICATE-----else this function might return the following error "openssl_pkcs12_export(): cannot get cert from parameter 1"If you want to include CA-Certificates in the PKCS12 it can be accomplished by using the $args parameter.<?php$args = array( 'extracerts' => $CAcert, 'friendly_name' => 'My signed cert by CA certificate' );openssl_pkcs12_export($signed_csr, $cerificate_out, $private_key_resource, $passphrase, $args);?>