HMAC SHA-1 Matching FIPS Examples

Provides an example of computing an HMAC-SHA1 digest to duplicate the FIPS examples at http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf

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use chilkat();

$crypt = new chilkat::CkCrypt2();

$success = $crypt->UnlockComponent("Anything for 30-day trial.");
if ($success != 1) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

$strToSign = "Sample #1";

#  64-byte key
$key = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f";

#  The expected result:
#  (from Appendix A.1 at http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf )
$expectedResult = "4f4ca3d5d68ba7cc0a1208c9c61e9c5da0403c0a";

#  Here is the code to duplicate the results:
$crypt->put_HashAlgorithm("sha-1");
$crypt->put_EncodingMode("hex");

$crypt->SetHmacKeyEncoded($key,"hex");

$mac = $crypt->hmacStringENC($strToSign);

print "Computed: " . $mac . "\r\n";
print "Expected: " . $expectedResult . "\r\n";