File: test_LakeKeyak.php

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File: test_LakeKeyak.php
Role: Example script
Content type: text/plain
Description: Example script
Class: PHP Keyak
Encrypt and decrypt authenticated data using Keyak
Author: By
Last change:
Date: 3 months ago
Size: 3,187 bytes
 

Contents

Class file image Download
<?
include "keyakv2.php";
/*
LakeKeyak can absorb up to 192 bytes of metadata per call to f
or up to 168 of plaintext, with additionally 24 bytes of metadata

, up to 150 bytes of nonce
*/

class Sender
   
{
    function
__construct ($K, $N, $tagFlag, $decryptFlag, $forgetFlag)
        {
   
$this->T = new stringStream;
       
$this->k = new Keyak("Lake");
       
$status = $this->k->StartEngine($K, $N, $tagFlag, $this->T, $decryptFlag, $forgetFlag);
    }
    function
sendAEADMsg($message, $metadata, $decryptFlag, $forgetFlag)
        {
       
$I = new stringStream($message);
       
$A = new stringStream($metadata);
       
$O = new stringStream;
       
$status = $this->k->Wrap($I, $O, $A, $this->T, $decryptFlag, $forgetFlag);
        return [
bin2hex($O->getvalue()), bin2hex($this->T->getvalue()), $status];
    }
    }
                 
class
Receiver
   
{
    function
__construct($K, $N, $tagFlag, $unwrapFlag, $forgetFlag)
        {
       
$this->k = new Keyak("Lake");
       
$this->T = new stringStream;
       
$status = $this->k->StartEngine($K, $N, $tagFlag, $this->T, $unwrapFlag, $forgetFlag);
    }
    function
recvAEADMsg($cipher, $metadata, $unwrapFlag_W, $forgetFlag, $T="")
        {
   
$O = new stringStream;
       
$I = new stringStream($cipher);
       
$A = new stringStream($metadata);
    if (
$T)
   
$this->T = new stringStream($T);
    else
$this->T=new stringStream;
       
$status = $this->k->Wrap($I, $O, $A, $this->T, $unwrapFlag_W, $forgetFlag);
        return [
bin2hex($O->getvalue()), $status];
    }
    }

$bool = ["False"=>0,"false"=>0,"True"=>1];
$vectors = array_slice(explode('*** Keyak',file_get_contents("https://github.com/samvartaka/keyak-python/raw/master/TestVectors/LakeKeyak.txt")),1);

foreach (
$vectors as $vector)
{
$K = pack("H*",explode(']',explode('> K: [',$vector)[1])[0]);
$N = pack("H*",explode(']',explode('> N: [',$vector)[1])[0]);
$T_valid = explode(']',@explode('< T (tag): [',explode('Wrap',$vector)[0])[1])[0];
$engine = explode(')',explode('StartEngine(K, N,',$vector)[1])[0];
$tagFlag = $bool[explode(',',explode('tagFlag=',$engine)[1])[0]];
$unwrapFlag = $bool[explode(',',explode('unwrapFlag=',$engine)[1])[0]];
$forgetFlag = $bool[explode('forgetFlag=',$engine)[1]];

$sender = new Sender($K, $N, $tagFlag, $unwrapFlag, $forgetFlag);

$wraps = array_slice(explode('Wrap(I, O, A, T,',$vector),1);

foreach (
$wraps as $wrap)
    {
   
$A = pack("H*",explode(']',explode('> A (metadata): [',$wrap)[1])[0]);
   
$I = pack("H*",explode(']',explode('> I (plaintext): [',$wrap)[1])[0]);
   
$O_valid = explode(']',explode('< O (ciphertext): [',$wrap)[1])[0];
   
$T_valid_wrap = explode(']',explode('< T (tag): [',$wrap)[1])[0];
   
   
$wrap = explode(")",$wrap)[0];
       
   
$unwrapFlag_W = $bool[explode(',',explode('unwrapFlag=',$wrap)[1])[0]];
   
$forgetFlag_W = $bool[explode('forgetFlag=',$wrap)[1]];
       
    echo
"\nCiphering ".bin2hex($I)."\n";
       
    [
$O,$T,$status] = $sender->sendAEADMsg($I, $A, $unwrapFlag_W, $forgetFlag_W);
   
    echo
"Cipher $O\nExpected $O_valid\nTag $T\nExpected $T_valid_wrap\n\n";
   
    if (
$O == $O_valid and $T == $T_valid_wrap) echo "Ok\n";
    else
        die(
"\n Bad Cipher");
    }
}


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