(PowerBuilder) Demonstrates the MacBytes Method

Demonstrates the MacBytes method to do HMAC-SHA256, HMAC-SHA1, and HMAC-MD5.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Crypt
string ls_SData
oleobject loo_BinData

// This example assumes Chilkat Crypt2 to have been previously unlocked.
// See Unlock Crypt2 for sample code.

// Demonstrates how to reproduce the following results found at
// https://en.wikipedia.org/wiki/Hash-based_message_authentication_code

// HMAC_SHA256("key", "The quick brown fox jumps over the lazy dog") = 0xf7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8
// HMAC_MD5("key", "The quick brown fox jumps over the lazy dog")    = 0x80070713463e7749b90c2dc24911e275
// HMAC_SHA1("key", "The quick brown fox jumps over the lazy dog")   = 0xde7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9

loo_Crypt = create oleobject
// Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Crypt.MacAlgorithm = "hmac"
loo_Crypt.EncodingMode = "hex"
loo_Crypt.SetMacKeyString("key")
ls_SData = "The quick brown fox jumps over the lazy dog"

// We're doing this in a convoluted, roundabout fashion to show syntax
// and data types for handling binary data.
// The straightforward way of doing an HMAC on a string is
// shown here: HMAC String

loo_BinData = create oleobject
// Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
li_rc = loo_BinData.ConnectToNewObject("Chilkat.BinData")

loo_BinData.AppendString(ls_SData,"utf-8")
loo_DataToHmac = loo_BinData.GetBinary()

loo_Crypt.HashAlgorithm = "SHA-256"
loo_MacBytes = loo_Crypt.MacBytes(loo_DataToHmac)
loo_BinData.Clear()
loo_BinData.AppendBinary(loo_MacBytes)
Write-Debug "HMAC_SHA256: " + loo_BinData.GetEncoded("hex")

loo_Crypt.HashAlgorithm = "MD5"
loo_MacBytes = loo_Crypt.MacBytes(loo_DataToHmac)
loo_BinData.Clear()
loo_BinData.AppendBinary(loo_MacBytes)
Write-Debug "HMAC_MD5: " + loo_BinData.GetEncoded("hex")

loo_Crypt.HashAlgorithm = "SHA-1"
loo_MacBytes = loo_Crypt.MacBytes(loo_DataToHmac)
loo_BinData.Clear()
loo_BinData.AppendBinary(loo_MacBytes)
Write-Debug "HMAC_SHA1: " + loo_BinData.GetEncoded("hex")

// The output is the same (ignore case)
// HMAC_SHA256: F7BC83F430538424B13298E6AA6FB143EF4D59A14946175997479DBC2D1A3CD8
// HMAC_MD5: 80070713463E7749B90C2DC24911E275
// HMAC_SHA1: DE7C9B85B8B78AA6BC8A7A36F70A90701C9DB4D9


destroy loo_Crypt
destroy loo_BinData