HMAC MD5 to Match RFC 2022 Test Vectors

Demonstrates using Chilkat in Visual Basic to computer HMAC MD5 message authentication codes to match the test vectors given by RFC 2202.

Download Chilkat Crypt ActiveX

Dim crypt As New ChilkatCrypt2

'  Any string argument automatically begins the 30-day trial.
Dim success As Long
success = crypt.UnlockComponent("30-day trial")
If (success <> 1) Then
    Text1.Text = Text1.Text & crypt.LastErrorText & vbCrLf
    Exit Sub
End If

'  The output will be Hex, so set the EncodingMode:
crypt.EncodingMode = "hex"

'  Set the hash algorithm:
'  Choices are: md5, sha-1, sha256, sha384, sha512, md2, haval
crypt.HashAlgorithm = "md5"

Dim mac As String

'  Set the HMAC key:
crypt.SetHmacKeyEncoded "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b","hex"
mac = crypt.HmacStringENC("Hi There")
Text1.Text = Text1.Text & mac & vbCrLf

crypt.SetHmacKeyEncoded "Jefe","ansi"
mac = crypt.HmacStringENC("what do ya want for nothing?")
Text1.Text = Text1.Text & mac & vbCrLf