HMAC MD5 to Match RFC 2022 Test Vectors

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

Download Chilkat Crypt ActiveX

LOCAL loCrypt
LOCAL lnSuccess
LOCAL lcMac

loCrypt = CreateObject('Chilkat.Crypt2')

*  Any string argument automatically begins the 30-day trial.

lnSuccess = loCrypt.UnlockComponent("30-day trial")
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX("Crypt component unlock failed")
    QUIT
ENDIF

*  The output will be Hex, so set the EncodingMode:
loCrypt.EncodingMode = "hex"

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

*  Set the HMAC key:
loCrypt.SetHmacKeyEncoded("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b","hex")
lcMac = loCrypt.HmacStringENC("Hi There")
? lcMac

loCrypt.SetHmacKeyEncoded("Jefe","us-ascii")
lcMac = loCrypt.HmacStringENC("what do ya want for nothing?")
? lcMac