(MFC) Demonstrates HMAC SHA256

Demonstrates HMAC-SHA256. Also demonstrates HMAC-SHA1 and HMAC-MD5.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkCrypt2.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // 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

    CkCrypt2 crypt;

    crypt.put_MacAlgorithm("hmac");
    crypt.put_EncodingMode("hex");
    crypt.SetMacKeyString("key");
    const char *sData = "The quick brown fox jumps over the lazy dog";

    crypt.put_HashAlgorithm("SHA-256");
    strOut.append("HMAC_SHA256: ");
    strOut.append(crypt.macStringENC(sData));
    strOut.append("\r\n");

    crypt.put_HashAlgorithm("MD5");
    strOut.append("HMAC_MD5: ");
    strOut.append(crypt.macStringENC(sData));
    strOut.append("\r\n");

    crypt.put_HashAlgorithm("SHA-1");
    strOut.append("HMAC_SHA1: ");
    strOut.append(crypt.macStringENC(sData));
    strOut.append("\r\n");

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


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }