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(C#) Blowfish CFB Mode EncryptionDemonstrates how to encrypt using Blowfish CFB (Cipher Feedback) mode.
// This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); // Use "blowfish2" to produce correct results that match published blowfish test vectors. crypt.CryptAlgorithm = "blowfish2"; crypt.CipherMode = "cfb"; crypt.KeyLength = 256; // EncodingMode specifies the encoding of the output for // encryption, and the input for decryption. // It may be "hex", "url", "base64", "quoted-printable", or many other choices. crypt.EncodingMode = "hex"; // The block size of the blowfish algoirthm is 8 bytes, therefore the IV is 8 bytes. string ivHex = "0001020304050607"; 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. string keyHex = "603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4"; crypt.SetEncodedKey(keyHex,"hex"); // Encrypt a string... string encStr = crypt.EncryptStringENC("In all intellectual debates, both sides tend to be correct in what they affirm, and wrong in what they deny. -- John Stuart Mill"); Debug.WriteLine(encStr); Chilkat.Crypt2 decrypt = new Chilkat.Crypt2(); decrypt.CryptAlgorithm = "blowfish2"; decrypt.CipherMode = "cfb"; decrypt.KeyLength = 256; decrypt.EncodingMode = "hex"; decrypt.SetEncodedIV(ivHex,"hex"); decrypt.SetEncodedKey(keyHex,"hex"); // Now decrypt: string decStr = decrypt.DecryptStringENC(encStr); Debug.WriteLine(decStr); |
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