how to create CSR in PHP?

Question

I am trying to create CSR using PHP and OpenSSL extension,
but when I do that it gives me an error which says:

Failed to generate private key: error:2006D080:BIO routines:BIO_new_file:no such file

also php.ini is edited correctly, I added extension=openssl.

This is my code:

<?php

$dn = array(
    "countryName" => "US",
    "stateOrProvinceName" => "California",
    "localityName" => "San Francisco",
    "organizationName" => "My Company",
    "organizationalUnitName" => "IT",
    "commonName" => "mycompany.com",
    "emailAddress" => "[email protected]"
);

// Generate a new private (and public) key pair
$privkey = openssl_pkey_new(array(
    "private_key_bits" => 2048,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
));

if ($privkey === false) {
    die('Failed to generate private key: ' . openssl_error_string());
}

// Generate a certificate signing request
$csr = openssl_csr_new($dn, $privkey);

if ($csr === false) {
    die('Failed to generate CSR: ' . openssl_error_string());
}

// Export the CSR as a string
$csrout = '';
if (!openssl_csr_export($csr, $csrout)) {
    die('Failed to export CSR: ' . openssl_error_string());
}

echo $csrout;

// Optionally, save the private key
$pkeyout = '';
if (!openssl_pkey_export($privkey, $pkeyout, 'your-passphrase')) {
    die('Failed to export private key: ' . openssl_error_string());
}
file_put_contents('private_key.pem', $pkeyout);

?>

I use Laragon as web server.

How can i solve this problem?

This seems to be an environment-specific problem. The posted PHP code can be successfully executed e.g. on paiza.io/projects/stQIvPF8_IwLQ-jzB_fV8A. The generated certificate and private key can be viewed in an ASN.1 parser, e.g. lapo.it/asn1js. Check your environment, e.g. php.net/manual/en/openssl.requirements.php. — Topaco
– Topaco, Commented Jun 13, 2024 at 6:35
@topaco this is a good news , but now i want to know what is the problem in my env , the second this i want to deploy this project on hostinger server , how can i make sure that it will work ? — momo
– momo, Commented Jun 13, 2024 at 6:37
@topaco i indeed looked at this source php.net/manual/en/openssl.requirements.php , but i could not install it — momo
– momo, Commented Jun 13, 2024 at 6:39

momo · Accepted Answer · 2024-06-13 06:53:35Z

1

the problem is that I have to install OpenSSL on my system,

my system is Windows system then to install it I should go to this website :

OpenSSL Binaries

then after that choose the second choice in the table:

this is the link of it :

Second choice

then after that choose the completed version of OpenSSL :

after that, it will download the installer version of OpenSSL, just install it, and it will work.

thanks

answered Jun 13, 2024 at 6:53

momo

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