Chilkat HOME ASP Visual Basic VB.NET C# Visual C++ C MFC Delphi FoxPro Java Perl PHP Python Ruby SQL Server VBScript
|
56-bit DES Encryption, ECB, CBC modes56-bit DES encryption. The Chilkat encryption component supports DES in both ECB (Electronic Cookbook) and CBC (Cipher-Block Chaining) cipher modes.
use chilkat; $crypt = new chilkat::CkCrypt2(); $success = $crypt->UnlockComponent("Anything for 30-day trial"); if ($success != 1) { print "Crypt component unlock failed" . "\n"; exit; } # Specify DES for the encryption algorithm: $crypt->put_CryptAlgorithm("des"); # CipherMode may be "ecb" or "cbc" $crypt->put_CipherMode("cbc"); # KeyLength must be 64. DES is technically 56-bits; # the most-significant bit of each key byte is a parity bit, # so we must indicate a KeyLength of 64, which includes # the parity bits. $crypt->put_KeyLength(64); # 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. DES has a block # size of 8 bytes, so encrypted output is always # a multiple of 8. $crypt->put_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". $crypt->put_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. $ivHex = "0001020304050607"; $crypt->SetEncodedIV($ivHex,"hex"); # The secret key must equal the size of the key. For # DES, the key must be 8 bytes (i.e. 64-bits). $keyHex = "0001020304050607"; $crypt->SetEncodedKey($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). $encStr = $crypt->encryptStringENC("The quick brown fox jumps over the lazy dog."); print $encStr . "\n"; # Now decrypt: $decStr = $crypt->decryptStringENC($encStr); print $decStr . "\n"; |
Need a specific example? Send a request to support@chilkatsoft.com
© 2000-2007 Chilkat Software, Inc. All Rights Reserved.