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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// Needs #include <CkCrypt2.h>

    CkString strOut;

    CkCrypt2 crypt;

    bool success;
    success = crypt.UnlockComponent("Anything for 30-day trial.");
    if (success != true) {
        strOut.append(crypt.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    const char * strToSign;
    strToSign = "Sample #1";

    //  64-byte key
    const char * key;
    key = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f";

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

    //  Here is the code to duplicate the results:
    crypt.put_HashAlgorithm("sha-1");
    crypt.put_EncodingMode("hex");

    crypt.SetHmacKeyEncoded(key,"hex");

    const char * mac;
    mac = crypt.hmacStringENC(strToSign);

    strOut.append("Computed: ");
    strOut.append(mac);
    strOut.append("\r\n");
    strOut.append("Expected: ");
    strOut.append(expectedResult);
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());