<?php
/**
* Class StreamTest
*/
class StreamTest extends PHPUnit_Framework_TestCase
{
/**
* @before
*/
public function before()
{
ParagonIE_Sodium_Compat::$disableFallbackForUnitTests = true;
}
/**
* @throws SodiumException
*/
public function testXChaChaStream()
{
$key = hash('sha256', 'test', true);
$nonce = ParagonIE_Sodium_Core_Util::substr(hash('sha224', 'test', true), 0, 24);
for ($i = 0; $i < 10; ++$i) {
$len = random_int(1, 65535);
$this->process($key, $nonce, $len, 'ParagonIE_Sodium_Compat::crypto_stream_xchacha20');
$this->process(random_bytes(32), random_bytes(24), $len, 'ParagonIE_Sodium_Compat::crypto_stream_xchacha20');
}
$stream = ParagonIE_Sodium_Compat::crypto_stream_xchacha20(32, $nonce, $key);
$this->assertSame(
'f41a191e9ae71f2fc3159c14f958d37929074820e3d65504d7481edbb3c9e2cb',
sodium_bin2hex($stream)
);
}
public function testSalsaStream()
{
$key = hash('sha256', 'test', true);
$nonce = ParagonIE_Sodium_Core_Util::substr(hash('sha224', 'test', true), 0, 24);
for ($i = 0; $i < 10; ++$i) {
$len = random_int(1, 65535);
$this->process($key, $nonce, $len, 'ParagonIE_Sodium_Compat::crypto_stream');
$this->process(random_bytes(32), random_bytes(24), $len, 'ParagonIE_Sodium_Compat::crypto_stream');
}
$stream = ParagonIE_Sodium_Compat::crypto_stream(32, $nonce, $key);
$this->assertSame(
'e16c87b630e0515e4a0f2aab3d613e3f413c07072fac3b29a101e5b562ff9fd8',
sodium_bin2hex($stream)
);
}
protected function process($key, $nonce, $len, $func = '')
{
$func_pieces= explode('::', $func);
$func_xor_pieces= explode('::', $func . '_xor');
$stream = call_user_func_array($func_pieces, array($len, $nonce, $key));
$this->assertSame($len, ParagonIE_Sodium_Core_Util::strlen($stream));
// Pseudorandom (but deterministic) nonce:
$n2 = ParagonIE_Sodium_Core_Util::substr(hash('sha224', $stream, true), 0, 24);
$encrypted = call_user_func_array($func_xor_pieces, array($stream, $n2, $key));
$decrypted = call_user_func_array($func_xor_pieces, array($encrypted, $n2, $key));
$this->assertSame(sodium_bin2hex($stream), sodium_bin2hex($decrypted), 'Decryption unsuccessful');
$this->assertNotSame(sodium_bin2hex($stream), sodium_bin2hex($encrypted), 'Encryption is a NOP');
}
}
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