<?php
use PHPUnit\Framework\TestCase;
class Salsa20Test extends TestCase
{
/**
* @before
*/
public function before(): void
{
ParagonIE_Sodium_Compat::$disableFallbackForUnitTests = true;
}
/**
* @covers ParagonIE_Sodium_Core_Salsa20::rotate()
*/
public function testRotate(): void
{
$this->assertEquals(
0x00001000,
ParagonIE_Sodium_Core_Salsa20::rotate(0x00000001, 12),
'Left rotate by 12'
);
$this->assertEquals(
0x00002000,
ParagonIE_Sodium_Core_Salsa20::rotate(0x00000001, 13),
'Left rotate by 13'
);
$this->assertEquals(
0x10000000,
ParagonIE_Sodium_Core_Salsa20::rotate(0x00000001, 28),
'Left rotate by 28'
);
$this->assertEquals(
0x80000000,
ParagonIE_Sodium_Core_Salsa20::rotate(0x00000001, 31),
'Left rotate by 31'
);
$this->assertEquals(
0x00000001,
ParagonIE_Sodium_Core_Salsa20::rotate(0x00000001, 32),
'Left rotate by 32'
);
$this->assertEquals(
0xf0001000,
ParagonIE_Sodium_Core_Salsa20::rotate(0x000f0001, 12),
'Left rotate by 12'
);
$this->assertEquals(
0xe0002001,
ParagonIE_Sodium_Core_Salsa20::rotate(0x000f0001, 13),
'Left rotate by 13'
);
$this->assertEquals(
0xc0004003,
ParagonIE_Sodium_Core_Salsa20::rotate(0x000f0001, 14),
'Left rotate by 14'
);
$this->assertEquals(
0x80008007,
ParagonIE_Sodium_Core_Salsa20::rotate(0x000f0001, 15),
'Left rotate by 15'
);
$this->assertEquals(
0x0001000f,
ParagonIE_Sodium_Core_Salsa20::rotate(0x000f0001, 16),
'Left rotate by 16'
);
}
/**
* @covers ParagonIE_Sodium_Core_Salsa20::salsa20()
*/
public function testVectors(): void
{
$key = "\x80" . str_repeat("\x00", 31);
$iv = str_repeat("\x00", 8);
$output = ParagonIE_Sodium_Core_Salsa20::salsa20(512, $iv, $key);
$this->assertSame(
'E3BE8FDD8BECA2E3EA8EF9475B29A6E7' .
'003951E1097A5C38D23B7A5FAD9F6844' .
'B22C97559E2723C7CBBD3FE4FC8D9A07' .
'44652A83E72A9C461876AF4D7EF1A117',
strtoupper(
bin2hex(
ParagonIE_Sodium_Core_Util::substr($output, 0, 64)
)
),
'Test vector #1 failed!'
);
$this->assertSame(
'57BE81F47B17D9AE7C4FF15429A73E10' .
'ACF250ED3A90A93C711308A74C6216A9' .
'ED84CD126DA7F28E8ABF8BB63517E1CA' .
'98E712F4FB2E1A6AED9FDC73291FAA17',
strtoupper(
bin2hex(
ParagonIE_Sodium_Core_Util::substr($output, 192, 64)
)
),
'Test vector #1 failed!'
);
}
/**
* @covers ParagonIE_Sodium_Core_Salsa20::core_salsa20()
*/
public function testCoreSalsa20(): void
{
$key = random_bytes(32);
$iv = random_bytes(8);
$outA = ParagonIE_Sodium_Core_Salsa20::salsa20(192, $iv, $key);
$outB = ParagonIE_Sodium_Core_Salsa20::core_salsa20($iv . str_repeat("\x00", 8), $key);
$outC = ParagonIE_Sodium_Core_Salsa20::core_salsa20($iv . "\x01" . str_repeat("\x00", 7), $key);
$outD = ParagonIE_Sodium_Core_Salsa20::core_salsa20($iv . "\x02" . str_repeat("\x00", 7), $key);
// First block
$this->assertSame(
bin2hex(
ParagonIE_Sodium_Core_Util::substr($outA, 0, 64)
),
bin2hex($outB)
);
// Second block
$this->assertSame(
bin2hex(
ParagonIE_Sodium_Core_Util::substr($outA, 64, 64)
),
bin2hex($outC)
);
// Third block
$this->assertSame(
bin2hex(
ParagonIE_Sodium_Core_Util::substr($outA, 128, 64)
),
bin2hex($outD)
);
}
}
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