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File: tests/unit/Salsa20Test.php

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File: tests/unit/Salsa20Test.php
Role: Class source
Content type: text/plain
Description: Class source
Class: PHP Sodium Compat
Cryptographic functions of libsodium in pure PHP
Author: By
Last change: Implement Salsa20, HSalsa20, XSalsa20.
Date: 11 months ago
Size: 4,888 bytes
 

Contents

Class file image Download
<?php

class Salsa20Test extends PHPUnit_Framework_TestCase
{
    public function
setUp()
    {
       
ParagonIE_Sodium_Compat::$disableFallbackForUnitTests = true;
    }

   
/**
     * @covers ParagonIE_Sodium_Core_Salsa20::rotate()
     */
   
public function testRotate()
    {
        if (
PHP_INT_SIZE === 4) {
            return;
        }
       
$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()
    {
       
$key = "\x80" . str_repeat("\x00", 31);
       
$iv = str_repeat("\x00", 8);

        if (
PHP_INT_SIZE === 4) {
           
$output = ParagonIE_Sodium_Core32_Salsa20::salsa20(512, $iv, $key);
        } else {
           
$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()
    {
       
$key = random_bytes(32);
       
$iv = random_bytes(8);
        if (
PHP_INT_SIZE === 4) {
           
$outA = ParagonIE_Sodium_Core32_Salsa20::salsa20(192, $iv, $key);
           
$outB = ParagonIE_Sodium_Core32_Salsa20::core_salsa20($iv . str_repeat("\x00", 8), $key);
           
$outC = ParagonIE_Sodium_Core32_Salsa20::core_salsa20($iv . "\x01" . str_repeat("\x00", 7), $key);
           
$outD = ParagonIE_Sodium_Core32_Salsa20::core_salsa20($iv . "\x02" . str_repeat("\x00", 7), $key);
        } else {
           
$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)
        );
    }
}