(PHP Extension) Hash Binary Data (SHA256 and other hash algorithms)

Demonstrates how to hash binary bytes using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?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.

// Let's load a binary file to get the bytes..
$jpgData = new CkBinData();
$success = $jpgData->LoadFile('qa_data/jpg/starfish.jpg');
if ($success != true) {
    print 'Failed to load file.' . "\n";
    exit;
}

$jpgBytes = new CkByteData();
$success = $jpgData->GetBinary($jpgBytes);

$crypt = new CkCrypt2();

// Choose the hash algorithm.
// Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
$crypt->put_HashAlgorithm('sha256');

$hashBytes = new CkByteData();
$success = $crypt->HashBytes($jpgBytes,$hashBytes);

// Let's examine the hash as a hex string.
$sb = new CkStringBuilder();
$sb->AppendEncoded($hashBytes,'hex');
print 'SHA256 hash = ' . $sb->getAsString() . "\n";

// We could alternatively hash the bytes and receive the hex result directly:
$crypt->put_EncodingMode('hex');
$hashHexStr = $crypt->hashBytesENC($jpgBytes);
print 'SHA256 hash = ' . $hashHexStr . "\n";

?>