(PHP ActiveX) Encrypt / Decrypt a File and Verify it has not Changed

Demonstrates how to encrypt and decrypt a file, and verify it has not changed.

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

// 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->PaddingScheme = 0;

$ivHex = '000102030405060708090A0B0C0D0E0F';
$crypt->SetEncodedIV($ivHex,'hex');

$keyHex = '00010203040506071011121314151617';
$crypt->SetEncodedKey($keyHex,'hex');

$dataFile = 'qa_data/zips/HBIQ040615300005.ZIP';
$outFile = 'qa_output/HBIQ040615300005.enc';
$outFile2 = 'qa_output/HBIQ040615300005.ZIP';

$success = $crypt->CkEncryptFile($dataFile,$outFile);
$success = $crypt->CkDecryptFile($outFile,$outFile2);

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.FileAccess')
$fac = new COM("Chilkat.FileAccess");
$bEqual = $fac->FileContentsEqual($dataFile,$outFile2);
if ($bEqual != 1) {
    print 'Decrypted file not equal to the original.' . "\n";
}
else {
    print 'Success.' . "\n";
}


?>