(Perl) Demonstrates the MacBytes Method

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

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# 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 = chilkat::CkCrypt2->new();

$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 = chilkat::CkByteData->new();
$binData = chilkat::CkBinData->new();
$binData->AppendString($sData,"utf-8");
$success = $binData->GetBinary($dataToHmac);

$macBytes = chilkat::CkByteData->new();

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

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

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

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