(VB.NET) 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
' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
Dim crypt As New Chilkat.Crypt2
Dim strToSign As String = "Sample #1"
' 64-byte key
Dim key As String = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f"
' The expected result:
' (from Appendix A.1 at http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf )
Dim expectedResult As String = "4f4ca3d5d68ba7cc0a1208c9c61e9c5da0403c0a"
' Here is the code to duplicate the results:
crypt.HashAlgorithm = "sha-1"
crypt.EncodingMode = "hex"
crypt.SetHmacKeyEncoded(key,"hex")
Dim mac As String
mac = crypt.HmacStringENC(strToSign)
Debug.WriteLine("Computed: " & mac)
Debug.WriteLine("Expected: " & expectedResult)
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