QuickHash Library Type Library


void HMAC_CalculateHex( [ in ] int nAlgID, [ out ]HMAC_HexDigest* pDest, [ in, size_is( nSrcLength ) ] const void* pSrc, [ in ]int nSrcLength, [in,size_is( nKeyLength )]const void* pKey, [ in ]int nKeyLength, [ in ] boolean bUpper );



    [in] The ID of the hash algorithm selected for calculations. For example, nAlgID has to be set to SHA1_ALGID when you need to calculate the HMAC using SHA-1 hash algorithm.

    Note. All supported hash algorithms with their corresponding IDs are specified in the Predefined Constants List.


    [out] A memory buffer that will receive the HMAC as an ASCII null-terminated string.

     Note. All predefined types are specified in the Predefined Types List.


    [in] A continuous memory block for which to calculate the HMAC.


    [in] Length in bytes of the memory block.


    [in] The key which represents a continuous memory block.


    [in] Length in bytes of the key.


    [in] Uppercase flag. If bUpper is False, the received HMAC represents a lowercase string, otherwise it represents an uppercase string.


Calculates the HMAC for the pSrc memory block using the key specified by pKey. The HMAC is retrieved as an ASCII null-terminated hexadecimal string in the pDest memory buffer.

VB Example

Private Sub MyButton_Click()   
    Dim Hmac As HMAC_HexDigest
    Dim MyStrData As String
    MyStrData = "Hello World!"
    Dim MyStrKey As String
    MyStrKey = "password"
    Dim nLen As Long
    nLen = Len(MyStrData)
    Dim nLenKey As Long
    nLenKey = Len(MyStrKey)
    'Convert the string to byte array
    Dim MyBinData() As Byte
    ReDim MyBinData(1 To nLen)    
    For i = 1 To nLen
        MyBinData(i) = Asc(Mid(MyStrData, i, 1))
    Next i    
    'Convert the key to byte array
    Dim MyBinKey() As Byte
    ReDim MyBinKey(1 To nLenKey)    
    For i = 1 To nLenKey
        MyBinKey(i) = Asc(Mid(MyStrKey, i, 1))
    Next i    
    'Get the MD5-HMAC
    HMAC_CalculateHex MD5_ALGID, Hmac, MyBinData(1), nLen, MyBinKey(1), nLenKey, True
    'Show the hexadecimal representation of the MD5-HMAC
    MsgBox QHASH_ASCIItoBSTR(Hmac.Value(0))
End Sub



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See Also    HMAC_Calculate, HMAC_CalculateStr, HMAC_CalculateStrHex, QHASH_ASCIItoBSTR



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