WIPE_Data zeroises data in memory.
Public Declare Function WIPE_Data Lib "diCryptoSys.dll"
(ByRef abData As Byte, ByVal nBytes As Long) As Long
Alternative aliases for Visual Basic users to deal with Byte and String types explicitly:
Public Declare Function WIPE_Bytes Lib "diCryptoSys.dll" Alias "WIPE_Data"
(ByRef abData As Byte, ByVal nBytes As Long) As Long
Public Declare Function WIPE_String Lib "diCryptoSys.dll" Alias "WIPE_Data"
(ByVal strData As String, ByVal nStrLen As Long) As Long
nRet = WIPE_Data(abData(0), nBytes)
Visual Basic only:-
nRet = WIPE_Bytes(abData(0), nBytes)
nRet = WIPE_String(strData, nStrLen)
Byte array to be cleared.Long specifying the number of bytes to be cleared.
long _stdcall WIPE_Data(void *lpData, long datalen);
Long: If successful, the return value is zero;
otherwise it returns an error code.
Wipe.Data Method
Wipe.String Method
Note the "(0)" in abData(0). This function does not free any memory; it just zeroises it.
Dim abData(3) As Byte Dim nLen As Long Dim nRet As Long ' Set up data in byte array abData(0) = &HDE abData(1) = &HAD abData(2) = &HBE abData(3) = &HEF Debug.Print "Before WIPE_Data: " & "[" & cnvHexStrFromBytes(abData) & "]" nLen = UBound(abData) - LBound(abData) + 1 nRet = WIPE_Data(abData(0), nLen) Debug.Print "After WIPE_Data: " & "[" & cnvHexStrFromBytes(abData) & "]"
or use alias in VB
nRet = WIPE_Bytes(abData(0), n)
Dim strData As String Dim nRet As Long strData = "my deepest secrets" Debug.Print "Before WIPE_String: " & "[" & strData & "]" nRet = WIPE_String(strData, Len(strData)) ' Set to empty as well... strData = "" Debug.Print "After WIPE_String: " & "[" & strData & "]"
In C:
char passwd[256];
printf("Enter password: ");
/* Accept password from user
* ...
* ... then do something with it
* ...
* Wipe it */
WIPE_Data(passwd, strlen(passwd));