(PHP Extension) Encrypt / Decrypt Secure Strings

Demonstrates how to use the EncryptSecureENC and DecryptSecureENC methods to encrypt/decrypt secure strings. These methods were added in Chilkat v9.5.0.71 (released January 2018).

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<?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 requires the Chilkat Crypt API to have been previously unlocked.
//  See Unlock Chilkat Crypt for sample code.

//  Load the secure string with some text.
$secStr1 = new CkSecureString();
$success = $secStr1->LoadFile('qa_data/txt/helloWorld.txt','utf-8');
if ($success != true) {
    print 'Failed to load helloWorld.txt' . "\n";
    exit;
}

$crypt = new CkCrypt2();

$crypt->put_CryptAlgorithm('aes');
$crypt->put_CipherMode('cbc');
$crypt->put_KeyLength(128);
$crypt->SetEncodedKey('000102030405060708090A0B0C0D0E0F','hex');
$crypt->SetEncodedIV('000102030405060708090A0B0C0D0E0F','hex');
$crypt->put_EncodingMode('base64');

//  Return the base64 encoded encrypted contents of secStr1.
$encryptedStr = $crypt->encryptSecureENC($secStr1);
print 'Encrypted string: ' . $encryptedStr . "\n";

//  Output:
//  Encrypted string: qiq+IFhcjTkEIkZyf31V/g==

//  Decrypt to secStr2:
$secStr2 = new CkSecureString();
$crypt->DecryptSecureENC($encryptedStr,$secStr2);

//  Access the contents of secStr2
print 'Decrypted string: ' . $secStr2->access() . "\n";

//  Output:
//  Decrypted string: Hello World!

?>