PHP Requires Chilkat v11.1.0+

openssl enc decrypt

See more Encryption Examples

Demonstrates how to decrypt a file that was encrypted using "openssl enc".

This example shows how to decrypt what was created using this openssl command:

openssl enc -e -aes-256-cbc -in hamlet.xml -out hamlet.enc -pass file:./secret.txt

This example shows how to do this:

openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt

Chilkat2 PHP

<?php

use Chilkat2\BinData;
use Chilkat2\Crypt2;

$success = false;

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

$crypt = new Crypt2();

// Use aes-256-cbc
$crypt->CryptAlgorithm = 'aes';
$crypt->CipherMode = 'cbc';
$crypt->KeyLength = 256;

// We'll need to set the hash algorithm to either MD5 or SHA256.
// openssl version 1.0.* or earlier used MD5 by default
// openssl version 1.1.* uses SHA-256 for the password to secret key derivation.

// For example, if openssl 1.1.0 was used, we should do this:
$crypt->HashAlgorithm = 'sha256';

// This example assumes openssl 1.0.2 was used to encrypt what we're now decrypting:
$crypt->HashAlgorithm = 'md5';

// The openssl command we are duplicating is:
//
//    openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt
//
// The file secret.txt contains the word "secret".  We could write code to load the contents
// of secret.txt, but instead we'll just do this:
$crypt->SetEncodedKey('secret', 'openssl');

// Load the file to be decrypted.
$fileData = new BinData();
$fileData->LoadFile('qa_data/openssl_enc/hamlet.enc');

// Decrypt
$crypt->VerboseLogging = true;
try {
    $crypt->DecryptBd($fileData);
} catch (\Chilkat2\Exception $e) {
    // $crypt->LastErrorText (below) shows what happened.
}
echo $crypt->LastErrorText, "\n";

// Save the decrypted output.
try {
    $fileData->WriteFile('c:/temp/qa_output/hamlet_dec.xml');
    $success = true;
} catch (\Chilkat2\Exception $e) {
    $success = false;
}

echo 'success = ', ($success ? 'true' : 'false'), "\n";