PHP Blowfish Encryption

This code snippet demonstrates blowfish encryption in PHP. Blowfish Encryption PHP Code Snippet.

<?php
	
	$cipher = mcrypt_module_open(MCRYPT_BLOWFISH, '', MCRYPT_MODE_CBC, '');
		
	// The block-size of the Blowfish algorithm is 64-bits, therefore our IV
	// is always 8 bytes:
	$iv =  '12345678';
	
	$key256 = '1234567890123456ABCDEFGHIJKLMNOP';
	$key128 = '1234567890123456';
	
	printf("iv: %s\n",bin2hex($iv));
	printf("key256: %s\n",bin2hex($key256));
	printf("key128: %s\n",bin2hex($key128));
	
	$cleartext = 'The quick brown fox jumped over the lazy dog';
	printf("clearText: %s\n\n",$cleartext);
		
	// Do 256-bit blowfish encryption:
	// The strengh of the encryption is determined by the length of the key
	// passed to mcrypt_generic_init
	if (mcrypt_generic_init($cipher, $key256, $iv) != -1)
	{
		// PHP pads with NULL bytes if $cleartext is not a multiple of the block size..
		$cipherText = mcrypt_generic($cipher,$cleartext );
		mcrypt_generic_deinit($cipher);
		
		// Display the result in hex.
		printf("256-bit blowfish encrypted:\n%s\n\n",bin2hex($cipherText));
	}
	
	// 128-bit blowfish encryption:
	if (mcrypt_generic_init($cipher, $key128, $iv) != -1)
	{
		// PHP pads with NULL bytes if $cleartext is not a multiple of the block size..
		$cipherText = mcrypt_generic($cipher,$cleartext );
		mcrypt_generic_deinit($cipher);
		
		// Display the result in hex.
		printf("128-bit blowfish encrypted:\n%s\n\n",bin2hex($cipherText));
	}
	
	// -------
	// Results
	// -------
	// You may use these as test vectors for testing your Blowfish implementations...
	// 
	// iv: 3132333435363738
	// key256: 313233343536373839303132333435364142434445464748494a4b4c4d4e4f50
	// key128: 31323334353637383930313233343536
	// clearText: The quick brown fox jumped over the lazy dog
	// 
	// 256-bit blowfish encrypted:
	// 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e
	// 
	// 128-bit blowfish encrypted:
	// d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca0	
	
?>
	
	

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