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

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

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.

// Let's load a binary file to get the bytes..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$jpgData = new COM("Chilkat.BinData");
$success = $jpgData->LoadFile('qa_data/jpg/starfish.jpg');
if ($success != 1) {
    print 'Failed to load file.' . "\n";
    exit;
}

$jpgBytes = $jpgData->GetBinary();

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

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

$hashBytes = $crypt->HashBytes($jpgBytes);

// Let's examine the hash as a hex string.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sb = new COM("Chilkat.StringBuilder");
$sb->AppendEncoded($hashBytes,'hex');
print 'SHA256 hash = ' . $sb->getAsString() . "\n";

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

?>