PowerBuilder

Blowfish Encryption, ECB, CBC, CFB modes

See more Encryption Examples

Blowfish encryption. The Chilkat encryption component supports Blowfish key sizes ranging from 32-bits to 448-bits. Chilkat's blowfish implementation supports ECB (Electronic Cookbook) , CBC (Cipher-Block Chaining), and CFB (Cipher Feedback) 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

//  Attention: use "blowfish2" for the algorithm name:
loo_Crypt.CryptAlgorithm = "blowfish2"

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

//  KeyLength (in bits) may be a number between 32 and 448.
//  128-bits is usually sufficient.  The KeyLength must be a 
//  multiple of 8.
loo_Crypt.KeyLength = 128

//  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.  Blowfish 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
//  256-bit encryption, the binary secret key is 32 bytes.
//  For 128-bit encryption, the binary secret key is 16 bytes.
ls_KeyHex = "000102030405060708090A0B0C0D0E0F"
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