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(C# UWP/WinRT) Blowfish Encryption to Match PHP's Mcrypt Extension

Demonstrates how to match Blowfish encryption results with PHP's mcrypt extension.

Please refer to this PHP (non-Chilkat) example for PHP Blowfish Encryption. The code here matches the PHP mcrypt results on that web page.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// 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 get proper results:
crypt.CryptAlgorithm = "blowfish2";

// CipherMode may be "ecb" or "cbc"
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.
crypt.KeyLength = 256;

// Pad with NULL bytes (PHP pads with NULL bytes)
crypt.PaddingScheme = 3;

// 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";

// The blowfish algorithm uses a 64-bit block size, 
// therefore the IV must be 8 bytes:
string ivAscii = "12345678";
crypt.SetEncodedIV(ivAscii,"ascii");

// For 256-bit encryption, the key is 32 bytes:
string keyAscii = "1234567890123456ABCDEFGHIJKLMNOP";
crypt.SetEncodedKey(keyAscii,"ascii");

string plainText;
plainText = "The quick brown fox jumped over the lazy dog";

string cipherText = crypt.EncryptStringENC(plainText);
Debug.WriteLine(cipherText);
// Output should be (case insensitive):
// 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e

// Do 128-bit Blowfish encryption:
crypt.KeyLength = 128;
keyAscii = "1234567890123456";
crypt.SetEncodedKey(keyAscii,"ascii");

cipherText = crypt.EncryptStringENC(plainText);
Debug.WriteLine(cipherText);
// Output should be (case insensitive):
// d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca

 

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