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

Download: Chilkat .NET Assemblies

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

bool success;
success = crypt.UnlockComponent("Anything for 30-day trial.");
if (success != true) {
    MessageBox.Show(crypt.LastErrorText);
    return;
}

string strToSign;
strToSign = "Sample #1";

//  64-byte key
string key;
key = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f";

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

//  Here is the code to duplicate the results:
crypt.HashAlgorithm = "sha-1";
crypt.EncodingMode = "hex";

crypt.SetHmacKeyEncoded(key,"hex");

string mac;
mac = crypt.HmacStringENC(strToSign);

textBox1.Text += "Computed: " + mac + "\r\n";
textBox1.Text += "Expected: " + expectedResult + "\r\n";