(PHP ActiveX) 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).

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 Crypt API to have been previously unlocked.
// See Unlock Chilkat Crypt for sample code.

// Load the secure string with some text.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.SecureString')
$secStr1 = new COM("Chilkat.SecureString");
$success = $secStr1->LoadFile('qa_data/txt/helloWorld.txt','utf-8');
if ($success != 1) {
    print 'Failed to load helloWorld.txt' . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2')
$crypt = new COM("Chilkat.Crypt2");

$crypt->CryptAlgorithm = 'aes';
$crypt->CipherMode = 'cbc';
$crypt->KeyLength = 128;
$crypt->SetEncodedKey('000102030405060708090A0B0C0D0E0F','hex');
$crypt->SetEncodedIV('000102030405060708090A0B0C0D0E0F','hex');
$crypt->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:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.SecureString')
$secStr2 = new COM("Chilkat.SecureString");
$crypt->DecryptSecureENC($encryptedStr,$secStr2);

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

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

?>