(PHP 4 >= 4.2.0, PHP 5)
openssl_csr_sign — Sign a CSR with another certificate (or itself) and generate a certificate
openssl_csr_sign() generates an x509 certificate resource from the given CSR.
Note: You need to have a valid openssl.cnf installed for this function to operate correctly. See the notes under the installation section for more information.
A CSR previously generated by openssl_csr_new(). It can also be the path to a PEM encoded CSR when specified as file://path/to/csr or an exported string generated by openssl_csr_export().
The generated certificate will be signed by cacert . If cacert is NULL, the generated certificate will be a self-signed certificate.
priv_key is the private key that corresponds to cacert .
days specifies the length of time for which the generated certificate will be valid, in days.
You can finetune the CSR signing by configargs . See openssl_csr_new() for more information about configargs .
An optional the serial number of issued certificate. If not specified it will default to 0.
Returns an x509 certificate resource on success, FALSE on failure.
| Version | Description |
|---|---|
| 4.3.3 | The serial parameter was added. |
Example #1 openssl_csr_sign() example - signing a CSR (how to implement your own CA)
<?php
// Let's assume that this script is set to receive a CSR that has
// been pasted into a textarea from another page
$csrdata = $_POST["CSR"];
// We will sign the request using our own "certificate authority"
// certificate. You can use any certificate to sign another, but
// the process is worthless unless the signing certificate is trusted
// by the software/users that will deal with the newly signed certificate
// We need our CA cert and its private key
$cacert = "file://path/to/ca.crt";
$privkey = array("file://path/to/ca.key", "your_ca_key_passphrase");
$userscert = openssl_csr_sign($csrdata, $cacert, $privkey, 365);
// Now display the generated certificate so that the user can
// copy and paste it into their local configuration (such as a file
// to hold the certificate for their SSL server)
openssl_x509_export($usercert, $certout);
echo $certout;
// Show any errors that occurred here
while (($e = openssl_error_string()) !== false) {
echo $e . "\n";
}
?>