(PHP ActiveX) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// 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.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Prng')
$fortuna = new COM("Chilkat.Prng");
$entropy = $fortuna->getEntropy(32,'base64');
$success = $fortuna->AddEntropy($entropy,'base64');

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Ecc')
$ec = new COM("Chilkat.Ecc");

// Generate a random EC private key on the prime256v1 curve.
// privKey is a Chilkat.PrivateKey
$privKey = $ec->GenEccKey('prime256v1',$fortuna);
if ($ec->LastMethodSuccess != 1) {
    print $ec->LastErrorText . "\n";
    exit;
}

// Create the CSR object and set properties.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Csr')
$csr = new COM("Chilkat.Csr");

// Specify your CN
$csr->CommonName = 'mysubdomain.mydomain.com';

// Create the CSR using the private key.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bdCsr = new COM("Chilkat.BinData");
$success = $csr->GenCsrBd($privKey,$bdCsr);
if ($success == 0) {
    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.

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Http')
$http = new COM("Chilkat.Http");

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert')
$tlsClientCert = new COM("Chilkat.Cert");
$success = $tlsClientCert->LoadFromFile('data/myTlsClientCert.pem');
if ($success == 0) {
    print $tlsClientCert->LastErrorText . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bdTlsClientCertPrivKey = new COM("Chilkat.BinData");
$success = $bdTlsClientCertPrivKey->LoadFile('data/myTlsClientCert.key.pem');
if ($success == 0) {
    print 'Failed to load data/myTlsClientCert.key.pem' . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey')
$tlsClientCertPrivKey = new COM("Chilkat.PrivateKey");
$success = $tlsClientCertPrivKey->LoadAnyFormat($bdTlsClientCertPrivKey,'');
if ($success == 0) {
    print $tlsClientCertPrivKey->LastErrorText . "\n";
    exit;
}

$success = $tlsClientCert->SetPrivateKey($tlsClientCertPrivKey);
if ($success == 0) {
    print $tlsClientCert->LastErrorText . "\n";
    exit;
}

$http->SetSslClientCert($tlsClientCert);

$http->RequireSslCertVerify = 1;

// The body of the HTTP request contains the binary CSR.
// resp is a Chilkat.HttpResponse
$resp = $http->PBinaryBd('POST','https://clientauth.demo.one.digicert.com/.well-known/est/IOT/simplereenroll',$bdCsr,'application/pkcs10',0,0);
if ($http->LastMethodSuccess == 0) {
    print $http->LastErrorText . "\n";
    exit;
}

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

    exit;
}

// The response is the Base64 DER of the new certificate.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert')
$myNewCert = new COM("Chilkat.Cert");
$success = $myNewCert->LoadFromBase64($resp->BodyStr);
if ($success == 0) {
    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 == 0) {
    print $myNewCert->LastErrorText . "\n";
    print 'Failed.' . "\n";
    exit;
}

print 'Success.' . "\n";

?>