openssl_csr_sign

PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8

openssl_csr_sign - Sign a CSR with another certificate (or itself) and generate a certificate

Code Examples

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");
$usercert = openssl_csr_sign($csrdata, $cacert, $privkey, 365, array('digest_alg'=>'sha256') );
// Now display the generated certificate so that the user can
// copy and paste it into their local configuration (such as a file
// to hold the certificate for their SSL server)
openssl_x509_export($usercert, $certout);
echo $certout;
// Show any errors that occurred here
while (($e = openssl_error_string()) !== false) {
    echo $e . "\n";
}

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openssl_csr_sign

Example #1 openssl_csr_sign example - signing a CSR (how to implement your own CA)

Function openssl_csr_sign:

OpenSSL Functions

Most used PHP functions