OpenSSL 函数
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openssl_csr_sign

(PHP 4 >= 4.2.0, PHP 5)

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

说明

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: 必须安装有有效的 openssl.cnf 以保证此函数正确运行. 参考 安装 的注释以获得更多信息.

参数

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.

返回值

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

更新日志

版本 说明
4.3.3 The serial parameter was added.

范例

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";
}
?>

OpenSSL 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Sign a CSR with another certificate (or itself) and generate a certificate

用户评论:

tgm (31-Aug-2011 01:31)

If openssl_csr_sign() works fine when self-signing, but returns FALSE when using $cacert, and there's no error message, it could have something to do with your openssl.cnf file.
In the section [ v3_ca ] there's a setting
  authorityKeyIdentifier=keyid:always,issuer:always
If you change it to
  authorityKeyIdentifier=issuer:always
the problem might be solved.

Kai Sellgren (20-Feb-2009 07:05)

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".

thomas dot lussnig at bewegungsmelder dot de (11-Jul-2002 04:34)

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";
?>

eric at ypass dot net (14-Jun-2002 12:13)

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);