C#

Demonstrates the MacBytesENC Method

Demonstrates the MacBytesENC method to do HMAC-SHA256, HMAC-SHA1, and HMAC-MD5. C#

//  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

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

crypt.MacAlgorithm = "hmac";
crypt.EncodingMode = "hex";
crypt.SetMacKeyString("key");
string 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
byte[] dataToHmac = null;
Chilkat.BinData binData = new Chilkat.BinData();
binData.AppendString(sData,"utf-8");
dataToHmac = binData.GetBinary();

crypt.HashAlgorithm = "SHA-256";
Debug.WriteLine("HMAC_SHA256: " + crypt.MacBytesENC(dataToHmac));

crypt.HashAlgorithm = "MD5";
Debug.WriteLine("HMAC_MD5: " + crypt.MacBytesENC(dataToHmac));

crypt.HashAlgorithm = "SHA-1";
Debug.WriteLine("HMAC_SHA1: " + crypt.MacBytesENC(dataToHmac));

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