openssl_csr_sign

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

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

설명

resource openssl_csr_sign ( mixed $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: 이 함수가 제대로 작동하려면 유효한 openssl.cnf을 설치해야 합니다. 자세한 정보는 설치 섹션의 주석을 살펴보십시오.

인수

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.

반환값

Returns an x509 certificate resource on success, FALSE on failure.

예제

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";
}
?>

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User Contributed Notes 4 notes

down

Sriraam ¶

9 years ago


config_section_section is incorrect. The correct keyword to use is "config_section_name".

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thomas dot lussnig at bewegungsmelder dot de ¶

22 years ago


Here is an sample how to create valid X.509 Public and Private Key (cert/key).
When not using self signed the 4.2.1 segault. You need the CVS code at least for openssl.

<?
Header("Content-Type: text/plain");
$CA_CERT = "CA.cert.pem";
$CA_KEY  = "CA.key.pem";
$req_key = openssl_pkey_new();
if(openssl_pkey_export ($req_key, $out_key)) {
        $dn = array(
                "countryName"            => "DE",
                "stateOrProvinceName"    => "Frankfurt",
                "organizationName"       => "smcc.net",
                "organizationalUnitName" => "E-Mail",
                "commonName"             => "Testcert"
                );
        $req_csr  = openssl_csr_new ($dn, $req_key);
        $req_cert = openssl_csr_sign($req_csr, "file://$CA_CERT", "file://$CA_KEY", 365);
        if(openssl_x509_export ($req_cert, $out_cert)) {
                echo "$out_key\n";
                echo "$out_cert\n";
                }
        else    echo "Failed Cert\n";
        }
else            echo "FailedKey\n";
?>

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eric at ypass dot net ¶

22 years ago


To generate a self-signed certificate, pass NULL as the signing certificate (2nd parameter).  For example:

$req_key = openssl_pkey_new();
$dn = array(
    "countryName" => "US",
    "stateOrProvinceName" => "Colorado",
    "organizationName" => "yPass.net",
    "organizationalUnitName" => "yPass.net",
    "commonName" => "yPass.net Root Certificate"
);
$req_csr = openssl_csr_new($dn, $req_key);
$req_cert = openssl_csr_sign($req_csr, NULL, $req_key, 365);

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-4

Kai Sellgren ¶

15 years ago


You can use file_get_contents() to directly pass the content instead of giving file paths.

Also, if you get an error "sec_error_reused_issuer_and_serial", put a serial into the last parameter:

<?php

$privkey = array(file_get_contents('ca.key'),"your_ca_key_passphrase");
$usercert = openssl_csr_sign($csrdata, file_get_contents('ca.crt'),$privkey,365,NULL,'06');
openssl_x509_export($usercert,$certout);
file_put_contents('serverCASigned.crt',$certout);

?>

In that above example the serial was "06".

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