CryptoSys API Examples VB6 to VB.NET

This is a conversion of most of the VB6 examples in the CryptoSys API manual to VB.NET. The translations are pretty literal, so we've left in many lines that could be left out or re-worded more appropriately. This is deliberate so you can better see how the translation is done. Lines in VB.NET deliberately commented out begin with two apostrophes ('').

Note that these examples are meant to show the basic operation of each primitive cryptographic function, using known test vectors wherever possible. They are not meant to show how to use the primitive functions as part of a proper cryptosystem. If you don't understand what this means, you probably shouldn't be using this library.

Download the original source code plus the complete HTML file (69 kB).

This document last updated 30 June 2010

Contents

Important points when converting VB6 code to VB.NET

AES

AES128_B64Mode | AES128_Bytes | AES128_BytesMode | AES128_File | AES128_FileHex | AES128_Hex | AES128_HexMode | AES128_InitError | AES128_Update | AES128_UpdateHex | AES192_HexMode | AES256_BytesMode

General

API_CompileTime | API_ErrorLookup | API_ErrorLookup_2 | API_LicenceType | API_PowerUpTests | API_Version

Blowfish

BLF_B64Mode | BLF_Bytes | BLF_BytesMode | BLF_File | BLF_FileHex | BLF_Hex | BLF_HexMode | BLF_Update | BLF_UpdateHex

Cipher

CIPHER_KeyUnwrap | CIPHER_KeyWrap

CRC

CRC_Bytes | CRC_File | CRC_String

DES

DES_HexMode

GCM

GCM_Encrypt | GCM_Encrypt_2 | GCM_InitKey

Hash

HASH_Bytes | HASH_File | HASH_HexFromBytes | HASH_HexFromHex

MAC

MAC_Bytes | MAC_HexFromBytes | MAC_HexFromHex

MD5

MD5_AddBytes | MD5_AddString | MD5_BytesHash | MD5_StringHexHash

Padding

PAD_BytesBlock | PAD_HexBlock | PAD_UnpadHex

PBE

PBE_Kdf2 | PBE_Kdf2Hex

PC1 (RC4)

PC1_Bytes | PC1_File | PC1_Hex

RNG

RNG_Initialize | RNG_KeyBytes | RNG_MakeSeedFile | RNG_NonceDataHex | RNG_Number

SHA

SHA1_AddString | SHA1_BytesHash | SHA1_FileHexHash | SHA1_StringHexHash | SHA2_StringHexHash

Triple DES

TDEA_B64Mode | TDEA_Bytes | TDEA_BytesMode | TDEA_FileHex | TDEA_HexMode | TDEA_Update

Wipe

WIPE_Data | WIPE_String

ZLIB

ZLIB_Deflate