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

Downloads for Windows/Linux and Install Instructions

require 'rubygems'
require 'chilkat'

crypt = Chilkat::CkCrypt2.new()

success = crypt.UnlockComponent("Anything for 30-day trial.")
if (success != true)
    print crypt.lastErrorText() + "\n"
    exit
end

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:
crypt.put_HashAlgorithm("sha-1")
crypt.put_EncodingMode("hex")

crypt.SetHmacKeyEncoded(key,"hex")

mac = crypt.hmacStringENC(strToSign)

print "Computed: " + mac + "\n";
print "Expected: " + expectedResult + "\n";