(Visual FoxPro) Demonstrates HMAC SHA256

Demonstrates HMAC-SHA256. Also demonstrates HMAC-SHA1 and HMAC-MD5.

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

LOCAL loCrypt
LOCAL lcSData

* 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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Crypt2')
loCrypt = CreateObject('Chilkat.Crypt2')

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

loCrypt.HashAlgorithm = "SHA-256"
? "HMAC_SHA256: " + loCrypt.MacStringENC(lcSData)

loCrypt.HashAlgorithm = "MD5"
? "HMAC_MD5: " + loCrypt.MacStringENC(lcSData)

loCrypt.HashAlgorithm = "SHA-1"
? "HMAC_SHA1: " + loCrypt.MacStringENC(lcSData)

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

RELEASE loCrypt