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(PHP ActiveX) Blowfish Encryption, ECB, CBC, CFB modesBlowfish encryption. The Chilkat encryption component supports Blowfish key sizes ranging from 32-bits to 448-bits. Chilkat's blowfish implementation supports ECB (Electronic Cookbook) , CBC (Cipher-Block Chaining), and CFB (Cipher Feedback) modes.
<?php // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2') $crypt = new COM("Chilkat.Crypt2"); // Attention: use "blowfish2" for the algorithm name: $crypt->CryptAlgorithm = 'blowfish2'; // CipherMode may be "ecb", "cbc", or "cfb" $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 = 128; // 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. Blowfish has a block // size of 8 bytes, so encrypted output is always // a multiple of 8. $crypt->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->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 // 256-bit encryption, the binary secret key is 32 bytes. // For 128-bit encryption, the binary secret key is 16 bytes. $keyHex = '000102030405060708090A0B0C0D0E0F'; $crypt->SetEncodedKey($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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