Adds an array of bytes to the digest.
Public Declare Function SHA2_AddBytes Lib "diCryptoSys.dll"
(ByVal hContext As Long, ByRef lpData As Byte, ByVal nDataLen As Long) As Long
nRet = SHA2_AddBytes(hContext, abData(0), nDataLen)
long __stdcall SHA2_AddBytes(long hContext, const unsigned char *lpData, long nDataLen);
If successful, the return value is 0; otherwise it returns a non-zero error code.
Sha256.AddData Method (Byte[])
The handle to the context hContext must have been set up with a
prior call to SHA2_Init
. This function may be called many times before creating
the final message digest with SHA2_HexDigest
.
SHA2_AddString
may also be called.
This example creates the hash of the three-character string "abc" using a mixture of calls
to SHA2_AddBytes
and SHA2_AddString
.
Dim nRet As Long Dim strDigest As String Dim hContext As Long Dim abData(2) As Byte ' Set context handle hContext = SHA2_Init() ' Remember to check for an invalid handle If hContext = 0 Then MsgBox "Failed to set context" Exit Function End If ' Set up a test array of bytes abData(0) = Asc("a") abData(1) = &H62 ' same as Asc("b") ' Add mixture of bytes and strings nRet = SHA2_AddBytes(hContext, abData(0), 2) nRet = SHA2_AddString(hContext, "c") ' Set strDigest to be 64 chars strDigest = String(64, " ") nRet = SHA2_HexDigest(strDigest, hContext) Debug.Print strDigest
This should result in output as follows:
ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad
SHA2_Init
SHA2_AddString
SHA2_HexDigest
SHA2_Reset