<?
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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