(PHP Extension) Demonstrates the MacBytes Method

Demonstrates the MacBytes method to do HMAC-SHA256, HMAC-SHA1, and HMAC-MD5.

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<?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 assumes Chilkat Crypt2 to have been previously unlocked.
// See Unlock Crypt2 for sample code.

// Demonstrates how to reproduce the following results found at
// https://en.wikipedia.org/wiki/Hash-based_message_authentication_code

// HMAC_SHA256("key", "The quick brown fox jumps over the lazy dog") = 0xf7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8
// HMAC_MD5("key", "The quick brown fox jumps over the lazy dog")    = 0x80070713463e7749b90c2dc24911e275
// HMAC_SHA1("key", "The quick brown fox jumps over the lazy dog")   = 0xde7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9

$crypt = new CkCrypt2();

$crypt->put_MacAlgorithm('hmac');
$crypt->put_EncodingMode('hex');
$crypt->SetMacKeyString('key');
$sData = 'The quick brown fox jumps over the lazy dog';

// We're doing this in a convoluted, roundabout fashion to show syntax
// and data types for handling binary data.
// The straightforward way of doing an HMAC on a string is
// shown here: HMAC String
$dataToHmac = new CkByteData();
$binData = new CkBinData();
$binData->AppendString($sData,'utf-8');
$success = $binData->GetBinary($dataToHmac);

$macBytes = new CkByteData();

$crypt->put_HashAlgorithm('SHA-256');
$success = $crypt->MacBytes($dataToHmac,$macBytes);
$binData->Clear();
$binData->AppendBinary($macBytes);
print 'HMAC_SHA256: ' . $binData->getEncoded('hex') . "\n";

$crypt->put_HashAlgorithm('MD5');
$success = $crypt->MacBytes($dataToHmac,$macBytes);
$binData->Clear();
$binData->AppendBinary($macBytes);
print 'HMAC_MD5: ' . $binData->getEncoded('hex') . "\n";

$crypt->put_HashAlgorithm('SHA-1');
$success = $crypt->MacBytes($dataToHmac,$macBytes);
$binData->Clear();
$binData->AppendBinary($macBytes);
print 'HMAC_SHA1: ' . $binData->getEncoded('hex') . "\n";

// The output is the same (ignore case)
// HMAC_SHA256: F7BC83F430538424B13298E6AA6FB143EF4D59A14946175997479DBC2D1A3CD8
// HMAC_MD5: 80070713463E7749B90C2DC24911E275
// HMAC_SHA1: DE7C9B85B8B78AA6BC8A7A36F70A90701C9DB4D9

?>