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.
<?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"); $usercert = openssl_csr_sign($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"; } ?>
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