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(PHP Extension) Renew a DigiCert Certificate from an EST-enabled profile

Demonstrates how to renew a certificate from an EST-enabled profile in DigiCert​​®​​ Trust Lifecycle Manager. (The certificate must be within the renewal window configured in the certificate profile. The CSR must have same Subject DN values as the original certificate.)

Chilkat PHP Downloads

PHP Extension for Windows, Linux, MacOS,
Alpine Linux, Solaris

<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// The example below duplicates the following OpenSSL commands:
// 
// # Name of certificate as argument 1
// 
// # Make new key
// openssl ecparam -name prime256v1 -genkey -noout -out ${1}.key.pem
// 
// # Make csr
// openssl req -new -sha256 -key ${1}.key.pem -out ${1}.p10.csr -subj "/CN=${1}"
// 
// # Request new cert
// curl -v --cacert data/ca.pem --cert data/${1}.pem --key data/${1}.key.pem 
//     --data-binary @${1}.p10.csr -o ${1}.p7.b64 -H "Content-Type: application/pkcs10" https://clientauth.demo.one.digicert.com/.well-known/est/IOT/simplereenroll
// 
// # Convert to PEM
// openssl base64 -d -in ${1}.p7.b64 | openssl pkcs7 -inform DER -outform PEM -print_certs -out ${1}.pem

// ------------------------------------------------------------------------------------------------------------------

// Create a Fortuna PRNG and seed it with system entropy.
// This will be our source of random data for generating the ECC private key.
$fortuna = new CkPrng();
$entropy = $fortuna->getEntropy(32,'base64');
$success = $fortuna->AddEntropy($entropy,'base64');

$ec = new CkEcc();

// Generate a random EC private key on the prime256v1 curve.
// privKey is a CkPrivateKey
$privKey = $ec->GenEccKey('prime256v1',$fortuna);
if ($ec->get_LastMethodSuccess() != true) {
    print $ec->lastErrorText() . "\n";
    exit;
}

// Create the CSR object and set properties.
$csr = new CkCsr();

// Specify your CN
$csr->put_CommonName('mysubdomain.mydomain.com');

// Create the CSR using the private key.
$bdCsr = new CkBinData();
$success = $csr->GenCsrBd($privKey,$bdCsr);
if ($success == false) {
    print $csr->lastErrorText() . "\n";

    exit;
}

// Save the private key and CSR to files.
$privKey->SavePkcs8EncryptedPemFile('password','c:/temp/qa_output/ec_privkey.pem');

$bdCsr->WriteFile('c:/temp/qa_output/csr.pem');

// ----------------------------------------------------------------------
// Now do the CURL request to POST the CSR and get the new certificate.

$http = new CkHttp();

$tlsClientCert = new CkCert();
$success = $tlsClientCert->LoadFromFile('data/myTlsClientCert.pem');
if ($success == false) {
    print $tlsClientCert->lastErrorText() . "\n";
    exit;
}

$bdTlsClientCertPrivKey = new CkBinData();
$success = $bdTlsClientCertPrivKey->LoadFile('data/myTlsClientCert.key.pem');
if ($success == false) {
    print 'Failed to load data/myTlsClientCert.key.pem' . "\n";
    exit;
}

$tlsClientCertPrivKey = new CkPrivateKey();
$success = $tlsClientCertPrivKey->LoadAnyFormat($bdTlsClientCertPrivKey,'');
if ($success == false) {
    print $tlsClientCertPrivKey->lastErrorText() . "\n";
    exit;
}

$success = $tlsClientCert->SetPrivateKey($tlsClientCertPrivKey);
if ($success == false) {
    print $tlsClientCert->lastErrorText() . "\n";
    exit;
}

$http->SetSslClientCert($tlsClientCert);

$http->put_RequireSslCertVerify(true);

// The body of the HTTP request contains the binary CSR.
// resp is a CkHttpResponse
$resp = $http->PBinaryBd('POST','https://clientauth.demo.one.digicert.com/.well-known/est/IOT/simplereenroll',$bdCsr,'application/pkcs10',false,false);
if ($http->get_LastMethodSuccess() == false) {
    print $http->lastErrorText() . "\n";
    exit;
}

if ($resp->get_StatusCode() != 200) {
    print 'response status code = ' . $resp->get_StatusCode() . "\n";
    print $resp->bodyStr() . "\n";
    print 'Failed' . "\n";

    exit;
}

// The response is the Base64 DER of the new certificate.
$myNewCert = new CkCert();
$success = $myNewCert->LoadFromBase64($resp->bodyStr());
if ($success == false) {
    print $myNewCert->lastErrorText() . "\n";
    print 'Cert data = ' . $resp->bodyStr() . "\n";
    print 'Failed.' . "\n";

    exit;
}

$success = $myNewCert->SaveToFile('c:/temp/qa_output/myNewCert.cer');
if ($success == false) {
    print $myNewCert->lastErrorText() . "\n";
    print 'Failed.' . "\n";
    exit;
}

print 'Success.' . "\n";

?>

 

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