PowerBuilder

56-bit DES Encryption, ECB, CBC modes

See more Encryption Examples

Demonstrates the older 56-bit DES encryption in ECB and CBC modes. PowerBuilder

integer li_rc
oleobject loo_Crypt
string ls_IvHex
string ls_KeyHex
string ls_EncStr
string ls_DecStr

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Specify DES for the encryption algorithm:
loo_Crypt.CryptAlgorithm = "des"

// CipherMode may be "ecb" or "cbc"
loo_Crypt.CipherMode = "cbc"

// Keylength is 64 bits (56 bits + 8 parity bits)
loo_Crypt.KeyLength = 64

// 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.  DES has a block
// size of 8 bytes, so encrypted output is always
// a multiple of 8.
loo_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".
loo_Crypt.EncodingMode = "hex"

// An initialization vector is required if using CBC or CFB modes.
// 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.
ls_IvHex = "0001020304050607"
loo_Crypt.SetEncodedIV(ls_IvHex,"hex")

// The secret key must equal the size of the key.  For 
// DES, the key must be 8 bytes (i.e. 64-bits).
ls_KeyHex = "0001020304050607"
loo_Crypt.SetEncodedKey(ls_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 8).
// Because the output is a hex string, it should
// be 96 characters long (2 chars per byte).
ls_EncStr = loo_Crypt.EncryptStringENC("The quick brown fox jumps over the lazy dog.")
Write-Debug ls_EncStr

// Now decrypt:
ls_DecStr = loo_Crypt.DecryptStringENC(ls_EncStr)
Write-Debug ls_DecStr


destroy loo_Crypt