(DataFlex) Demonstrates the MacBytesENC Method

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

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

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoCrypt
    Boolean iSuccess
    String sSData
    Variant hoDataToHmac
    Handle hoBinData
    String sTemp1

    // 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

    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End

    Set ComMacAlgorithm Of hoCrypt To "hmac"
    Set ComEncodingMode Of hoCrypt To "hex"
    Get ComSetMacKeyString Of hoCrypt "key" To iSuccess
    Move "The quick brown fox jumps over the lazy dog" To sSData

    // 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

    Get Create (RefClass(cComChilkatBinData)) To hoBinData
    If (Not(IsComObjectCreated(hoBinData))) Begin
        Send CreateComObject of hoBinData
    End
    Get ComAppendString Of hoBinData sSData "utf-8" To iSuccess
    Get ComGetBinary Of hoBinData To hoDataToHmac

    Set ComHashAlgorithm Of hoCrypt To "SHA-256"
    Get ComMacBytesENC Of hoCrypt vDataToHmac To sTemp1
    Showln "HMAC_SHA256: " sTemp1

    Set ComHashAlgorithm Of hoCrypt To "MD5"
    Get ComMacBytesENC Of hoCrypt vDataToHmac To sTemp1
    Showln "HMAC_MD5: " sTemp1

    Set ComHashAlgorithm Of hoCrypt To "SHA-1"
    Get ComMacBytesENC Of hoCrypt vDataToHmac To sTemp1
    Showln "HMAC_SHA1: " sTemp1

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


End_Procedure