openssl_csr_sign

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

openssl_csr_sign — 用另一个证书签署 CSR（或者本身）并且生成一个证书

说明

openssl_csr_sign() 从给定的 CSR 生成 x509 证书。

注意: 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。

参数

csr: 由 openssl_csr_new() 函数生成的 CSR。也可以是由类似file://path/to/csr格式指定的指向 PEM 编码的 CSR 路径，或者是一个由openssl_csr_export()函数生成的字符串。
ca_certificate: 生成的证书将由ca_certificate签名。如果ca_certificate 为 null, 生成的证书将是自签名证书。
private_key: private_key 是 ca_certificate 证书对应的私钥。
days: days 指定生成的证书在几天内有效的时间长度。
options: 可以通过 options 确定 CSR 签名。查看 openssl_csr_new() 方法获取 options 的更多相关信息。
serial: 可选的发行证书编号。如果没有指定默认值为0.

返回值

成功时返回 OpenSSLCertificate，失败则返回 false。

更新日志

版本	说明
8.0.0	成功时，此函数现在返回 OpenSSLCertificate 实例；之前返回类型 `OpenSSL X.509` 的 resource。
8.0.0	`csr` 现在接受 OpenSSLCertificateSigningRequest 实例；之前接受类型 `OpenSSL X.509 CSR` 的 resource。
8.0.0	`ca_certificate` 现在接受 OpenSSLCertificate 实例；之前接受类型 `OpenSSL X.509` 的 resource。
8.0.0	`private_key` 现在接受 OpenSSLAsymmetricKey 或 OpenSSLCertificate 实例；之前接受类型 `OpenSSL key` 或 `OpenSSL X.509` 的 resource。

示例

示例 #1 openssl_csr_sign() 示例——签署 CSR（如何实现自己的 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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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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