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(PHP Extension) Generate an RSA Key and Get as Base64 DERDemonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER.
<?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"); // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $rsa = new CkRsa(); // Generate a 2048-bit key. Chilkat RSA supports $success = $rsa->GenerateKey(2048); if ($success != true) { print $rsa->lastErrorText() . "\n"; exit; } // Get the public part of the key. // pubKey is a CkPublicKey $pubKey = $rsa->ExportPublicKeyObj(); // There are two possible formats for representing the RSA public key // in ASN.1 (DER). The possible formats are PKCS1 and PKCS8. // We can get either by setting bChoosePkcs1 to true or false. $bChoosePkcs1 = true; $pubKeyBase64Der = $pubKey->getEncoded($bChoosePkcs1,'base64'); print 'Public Key Base64 DER:' . "\n"; print $pubKeyBase64Der . "\n"; // Now get the private key as Base64 DER: // Get the private part of the key. // (Note: A public key is actually just a subset of the private key. // If you have the private key, you also have the public key. // Thus Chilkat provides a method to get the public key from the private key.) // privKey is a CkPrivateKey $privKey = $rsa->ExportPrivateKeyObj(); // Again, we can get PKCS1 or PKCS8, but with different methods: $privKeyPkcs1 = $privKey->getPkcs1ENC('base64'); print 'Private Key PKCS1 Base64 DER:' . "\n"; print $privKeyPkcs1 . "\n"; $privKeyPkcs8 = $privKey->getPkcs8ENC('base64'); print 'Private Key PKCS8 Base64 DER:' . "\n"; print $privKeyPkcs8 . "\n"; ?> |
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