Initialises the context with the key, direction and mode ready for repeated operations of the DES function. The key and IV data are provided in byte arrays.
Public Declare Function DES_Init Lib "diCryptoSys.dll"
(ByRef abKey As Byte, ByVal bEncrypt As Boolean,
ByVal strMode As String, ByRef abInitV As Byte) As Long
hContext = DES_Init(abKey, bEncrypt, strMode, abInitV)
Byte array containing the key.Long containing the length of the key in bytes.Boolean direction flag:
set as True to encrypt or False
to decrypt.String specifying the confidentiality mode:Byte array containing the initialization vector (IV),
or zero (0) for ECB mode.
long _stdcall DES_Init(const unsigned char *key,
int bEncrypt, const char *lpszMode, const unsigned char *iv);
Long: non-zero handle of the context hContext
to be used in subsequent calls to the functions
DES_Update, DES_UpdateHex or DES_Final.
Returns zero if an error occurs.
Des.InitEncrypt Method (Byte[], Mode, Byte[])
Des.InitDecrypt Method (Byte[], Mode, Byte[])
The key abKey must be exactly 24 bytes long and the IV, if required, exactly 8 bytes long.
Unlike most other functions in this API, DES_Init returns zero if an error occurs.
It is important to check that the value of hContext returned is
not equal to zero before calling a DES_Update function.
See DES_Update.
DES_InitHex
DES_UpdateHex
DES_Update
DES_Final