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PHP Extension Examples

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(PHP Extension) Create JCEKS Containing Secret Keys

Demonstrates how to create a JCEKS keystore file containing symmetric secret keys (for AES, Blowfish, HMAC SHA25, ChaCha20, etc.)

This example requires Chilkat v9.5.0.66 or greater.

Chilkat PHP Downloads

PHP Extension for Windows, Linux, MAC OS X,
Alpine Linux, Solaris, OpenBSD, FreeBSD,
and Linux armhf/aarch64

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

//  IMPORTANT: This example requires Chilkat v9.5.0.66 or greater.

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

$jceks = new CkJavaKeyStore();

//  We'll need a pseudo-random number generator (PRNG) to generate symmetric keys.
$prng = new CkPrng();

//  Generate some keys..

//  128-bit AES key (16 bytes)
$aesKey = $prng->genRandom(16,'base64');

//  256-bit Blowfish key (32 bytes)
$blowfishKey = $prng->genRandom(32,'base64');

//  HMAC SHA256 key
//  (An HMAC key can be anything, and any length. We'll use the following string:
$hmacKey = 'This is my HMAC key';

//  ChaCha20 256-bit
$chachaKey = $prng->genRandom(32,'base64');

//  Add each secret key to the JCEKS
$encoding = 'base64';
$password = 'secret';
$jceks->AddSecretKey($aesKey,$encoding,'AES','my aes key',$password);
$jceks->AddSecretKey($blowfishKey,$encoding,'BLOWFISH','my blowfish key',$password);
//  For HMAC, we're using the us-ascii bytes for the key..
$jceks->AddSecretKey($hmacKey,'ascii','HMAC_SHA256','my hmac key',$password);
$jceks->AddSecretKey($chachaKey,$encoding,'CHACHA','my chacha20 key',$password);

$filePassword = 'password';
//  Write the JCEKs to a file.
$success = $jceks->ToFile($filePassword,'qa_output/secretKeys.jceks');
if ($success != true) {
    print $jceks->lastErrorText() . "\n";
    exit;
}

//  We can also emit as a JWK Set..
$sbJson = new CkStringBuilder();
$success = $jceks->ToJwkSet('secret',$sbJson);
if ($success != true) {
    print $jceks->lastErrorText() . "\n";
    exit;
}

//  Emit the JSON in pretty-printed (indented) form:
$json = new CkJsonObject();
$json->LoadSb($sbJson);
$json->put_EmitCompact(false);
print $json->emit() . "\n";

//  Output is:

//  {
//    "keys": [
//      {
//        "kty": "oct",
//        "alg": "AES",
//        "k": "vHekQQB0Gc1NvppapUTW2g",
//        "kid": "my aes key"
//      },
//      {
//        "kty": "oct",
//        "alg": "BLOWFISH",
//        "k": "qHsdXaJsXicVCZbK8l8hJQpYOa0GkiO9gsRK9WLtht8",
//        "kid": "my blowfish key"
//      },
//      {
//        "kty": "oct",
//        "alg": "HMAC_SHA256",
//        "k": "VGhpcyBpcyBteSBITUFDIGtleQ",
//        "kid": "my hmac key"
//      },
//      {
//        "kty": "oct",
//        "alg": "CHACHA",
//        "k": "yNv832U43C9BcWvaQAH2_rG-GwfmpgT5JBRllWGQY1o",
//        "kid": "my chacha20 key"
//      }
//    ]
//  }
// 

?>

 

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