(Ruby) HMAC Hex String

Demonstrates how to compute an HMAC using a hexidecimal key and data.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

crypt = Chilkat::CkCrypt2.new()

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

#  Set the MAC algorithm to HMAC
crypt.put_MacAlgorithm("hmac")

#  Our HMAC key will be the bytes represented in the following hex string.
#  In other words, the HMAC key is composed of the bytes 0x41, 0xC2, 0x1C, ...
#  (It is not composed of the us-ascii string '4', '1', 'C', ...)
keyHex = "41C21CB9D7A02FC5D4FADB9E4755B9DE"
success = crypt.SetMacKeyEncoded(keyHex,"hex")

#  Our desire is to HMAC the bytes represented in the following string:
dataHex = "C22078065B01460001000000010062043BF5B18228C8E02D17BCFE4E00561FA6DEC216EA97195CEB579942E275C21932258E3CD391E507FF4E7FD4C787A8447DA111C54A9C1795E7FF4C0BAA2EDA"

#  We'll need to decode the hex to binary:
bd = Chilkat::CkBinData.new()
bd.AppendEncoded(dataHex,"hex")

#  Do the HMAC-SHA256 hash and return as a hex string:
crypt.put_EncodingMode("hex")
crypt.put_HashAlgorithm("sha-256")
macHex = crypt.macBdENC(bd)
print macHex + "\n";