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(PHP ActiveX) AES-CMACDemonstrates using the AES-CMAC algorithm, which is a keyed hash function similar to HMAC and Poly1305. Note: Chilkat added AES-CMAC in version 9.5.0.95.
<?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"); // Set the MAC algorithm to AES-CMAC $crypt->MacAlgorithm = 'aes-cmac'; // AES-CMAC always uses a 16-byte (128-bit) MAC key. $keyHex = '2b7e151628aed2a6abf7158809cf4f3c'; $success = $crypt->SetMacKeyEncoded($keyHex,'hex'); // Let's compute the AES-CMAC for the test vector at https://www.rfc-editor.org/rfc/rfc4493#appendix-A // Here we have 64 bytes in hex representation. $messageBytes = '6bc1bee22e409f96e93d7e117393172aae2d8a571e03ac9c9eb76fac45af8e5130c81c46a35ce411e5fbc1191a0a52eff69f2445df4f9b17ad2b417be66c3710'; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData') $bd = new COM("Chilkat.BinData"); $bd->AppendEncoded($messageBytes,'hex'); // Compute the AES-CMAC for the bytes contained in bd and return the AES-CMAC in hex representation. $crypt->EncodingMode = 'hex_lower'; $cmac = $crypt->macBdENC($bd); print $cmac . "\n"; // Output should be: 51f0bebf7e3b9d92fc49741779363cfe // Now do the same for a string: $plainText = ''Twas brillig, and the slithy toves\nDid gyre and gimble in the wabe:\nAll mimsy were the borogoves,\nAnd the mome raths outgrabe.'; $encTag = $crypt->macStringENC($plainText); print $encTag . "\n"; // Output should be: 4fca1fcbd265048d247f99ab57fa3ceb ?> |
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