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VBScript Examples

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(VBScript) AES Encryption

AES encryption. The Chilkat encryption component supports 128-bit, 192-bit, and 256-bit AES encryption in ECB (Electronic Cookbook), CBC (Cipher-Block Chaining), and other modes.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

set crypt = CreateObject("Chilkat_9_5_0.Crypt2")

success = crypt.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    outFile.WriteLine(crypt.LastErrorText)
    WScript.Quit
End If

'  AES is also known as Rijndael.
crypt.CryptAlgorithm = "aes"

'  CipherMode may be "ecb", "cbc", "ofb", "cfb", "gcm", etc.
'  Note: Check the online reference documentation to see the Chilkat versions
'  when certain cipher modes were introduced.
crypt.CipherMode = "cbc"

'  KeyLength may be 128, 192, 256
crypt.KeyLength = 256

'  The padding scheme determines the contents of the bytes
'  that are added to pad the result to a multiple of the
'  encryption algorithm's block size.  AES has a block
'  size of 16 bytes, so encrypted output is always
'  a multiple of 16.
crypt.PaddingScheme = 0

'  EncodingMode specifies the encoding of the output for
'  encryption, and the input for decryption.
'  It may be "hex", "url", "base64", or "quoted-printable".
crypt.EncodingMode = "hex"

'  An initialization vector is required if using CBC mode.
'  ECB mode does not use an IV.
'  The length of the IV is equal to the algorithm's block size.
'  It is NOT equal to the length of the key.
ivHex = "000102030405060708090A0B0C0D0E0F"
crypt.SetEncodedIV ivHex,"hex"

'  The secret key must equal the size of the key.  For
'  256-bit encryption, the binary secret key is 32 bytes.
'  For 128-bit encryption, the binary secret key is 16 bytes.
keyHex = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F"
crypt.SetEncodedKey keyHex,"hex"

'  Encrypt a string...
'  The input string is 44 ANSI characters (i.e. 44 bytes), so
'  the output should be 48 bytes (a multiple of 16).
'  Because the output is a hex string, it should
'  be 96 characters long (2 chars per byte).
encStr = crypt.EncryptStringENC("The quick brown fox jumps over the lazy dog.")
outFile.WriteLine(encStr)

'  Now decrypt:
decStr = crypt.DecryptStringENC(encStr)
outFile.WriteLine(decStr)

outFile.Close

 

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