Xbase++

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. Xbase++

LOCAL oCrypt
LOCAL cIvHex
LOCAL cKeyHex
LOCAL cEncStr
LOCAL cDecStr

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

oCrypt := CreateObject("Chilkat.Crypt2")

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

//  CipherMode may be "ecb", "cbc", or "cfb"
oCrypt: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.
oCrypt: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.
oCrypt: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".
oCrypt: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.
cIvHex := "0001020304050607"
oCrypt:SetEncodedIV(cIvHex, "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.
cKeyHex := "000102030405060708090A0B0C0D0E0F"
oCrypt:SetEncodedKey(cKeyHex, "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).
cEncStr := oCrypt:EncryptStringENC("The quick brown fox jumps over the lazy dog.")
? cEncStr

//  Now decrypt:
cDecStr := oCrypt:DecryptStringENC(cEncStr)
? cDecStr

oCrypt:destroy()