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(PHP Extension) 56-bit DES Encryption, ECB, CBC modesDemonstrates the older 56-bit DES encryption in ECB and CBC modes.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $crypt = new CkCrypt2(); // Specify DES for the encryption algorithm: $crypt->put_CryptAlgorithm('des'); // CipherMode may be "ecb" or "cbc" $crypt->put_CipherMode('cbc'); // Keylength is 64 bits (56 bits + 8 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"; ?> |
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