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HMAC SHA-1 Matching FIPS Examples

See more Encryption 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 PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$crypt = New-Object Chilkat.Crypt2

$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.HashAlgorithm = "sha-1"
$crypt.EncodingMode = "hex"
$crypt.MacAlgorithm = "hmac"

$crypt.SetMacKeyEncoded($key,"hex")

$mac = $crypt.MacStringENC($strToSign)

$("Computed: " + $mac)
$("Expected: " + $expectedResult)