(PHP 4 >= 4.2.0, PHP 5, PHP 7)
openssl_csr_sign — Sign a CSR with another certificate (or itself) and generate a certificate
$csr
, mixed $cacert
, mixed $priv_key
, int $days
[, array $configargs
[, int $serial
= 0
]] )openssl_csr_sign() generates an x509 certificate resource from the given CSR.
Note: 必须安装有效的 openssl.cnf 以保证此函数正确运行。参考有关安装的说明以获得更多信息。
csr
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().
cacert
The generated certificate will be signed by cacert
.
If cacert
is NULL
, the generated certificate
will be a self-signed certificate.
priv_key
priv_key
is the private key that corresponds to
cacert
.
days
days
specifies the length of time for which the
generated certificate will be valid, in days.
configargs
You can finetune the CSR signing by configargs
.
See openssl_csr_new() for more information about
configargs
.
serial
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.
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, $privkey, 365);
// Now display the generated certificate so that the user can
// copy and paste it into their local configuration (such as a file
// to hold the certificate for their SSL server)
openssl_x509_export($usercert, $certout);
echo $certout;
// Show any errors that occurred here
while (($e = openssl_error_string()) !== false) {
echo $e . "\n";
}
?>