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(PHP ActiveX) Get an EC Key in Raw Hex FormatDemonstrates how to get the private and public key parts of an EC (ECDSA) key in lowercase hex formmat. Note: This example requires Chilkat v9.5.0.83 or greater.
<?php // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Load an EC key from some format.. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey') $privKey = new COM("Chilkat.PrivateKey"); // This loads an ECDSA key from an unencrypted PEM file (no password required). $success = $privKey->LoadAnyFormatFile('qa_data/ecc/openssl_ecc_privKey.pem',''); if ($success == 0) { print $privKey->LastErrorText . "\n"; exit; } // The key type should be "ecc" to indicate an EC key. print 'key type = ' . $privKey->KeyType . "\n"; // What is the size of the private key in bits? print 'size in bits = ' . $privKey->BitLength . "\n"; // Get the private and public EC key parts in raw hex format: // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbPubKeyHex = new COM("Chilkat.StringBuilder"); $privKeyHex = $privKey->getRawHex($sbPubKeyHex); // If the private key size in bits is 256, then we should have a 32-byte key (a 64 character hex string). print 'private key = ' . $privKeyHex . "\n"; // The public key is composed of the "x" and "y" parts, and is composed like this: 04||HEX(x)||HEX(y) print 'public key = ' . $sbPubKeyHex->getAsString() . "\n"; // Sample output: // key type = ecc // size in bits = 256 // private key = ced36f2ba3332be439f79143d69937fc52494cd38e45243c3ea05db183919f1b // public key = 045b4edcd501831740895f5907feabb71587076a6314d9d5141f9f8c33a478b8ce08b8dfd2a091eb6355803d7e729876c790bc0b176f2015f3bb103813753f676a ?> |
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