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(Tcl) HMAC Hex StringDemonstrates how to compute an HMAC using a hexidecimal key and data.
load ./chilkat.dll # This example assumes the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. set crypt [new_CkCrypt2] # Set the MAC algorithm to HMAC CkCrypt2_put_MacAlgorithm $crypt "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', ...) set keyHex "41C21CB9D7A02FC5D4FADB9E4755B9DE" set success [CkCrypt2_SetMacKeyEncoded $crypt $keyHex "hex"] # Our desire is to HMAC the bytes represented in the following string: set dataHex "C22078065B01460001000000010062043BF5B18228C8E02D17BCFE4E00561FA6DEC216EA97195CEB579942E275C21932258E3CD391E507FF4E7FD4C787A8447DA111C54A9C1795E7FF4C0BAA2EDA" # We'll need to decode the hex to binary: set bd [new_CkBinData] CkBinData_AppendEncoded $bd $dataHex "hex" # Do the HMAC-SHA256 hash and return as a hex string: CkCrypt2_put_EncodingMode $crypt "hex" CkCrypt2_put_HashAlgorithm $crypt "sha-256" set macHex [CkCrypt2_macBdENC $crypt $bd] puts "$macHex" delete_CkCrypt2 $crypt delete_CkBinData $bd |
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