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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#include <C_CkCrypt2.h>

void ChilkatSample(void)
    {
    HCkCrypt2 crypt;
    BOOL success;
    const char * strToSign;
    const char * key;
    const char * expectedResult;
    const char * mac;

    crypt = CkCrypt2_Create();

    success = CkCrypt2_UnlockComponent(crypt,"Anything for 30-day trial.");
    if (success != TRUE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        return;
    }

    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:
    CkCrypt2_putHashAlgorithm(crypt,"sha-1");
    CkCrypt2_putEncodingMode(crypt,"hex");

    CkCrypt2_SetHmacKeyEncoded(crypt,key,"hex");

    mac = CkCrypt2_hmacStringENC(crypt,strToSign);

    printf("Computed: %s\n",mac);
    printf("Expected: %s\n",expectedResult);


    CkCrypt2_Dispose(crypt);

    }