diff options
Diffstat (limited to 'vendor/paragonie/sodium_compat/src/Core32/Salsa20.php')
-rw-r--r-- | vendor/paragonie/sodium_compat/src/Core32/Salsa20.php | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/vendor/paragonie/sodium_compat/src/Core32/Salsa20.php b/vendor/paragonie/sodium_compat/src/Core32/Salsa20.php new file mode 100644 index 0000000..d8c8073 --- /dev/null +++ b/vendor/paragonie/sodium_compat/src/Core32/Salsa20.php @@ -0,0 +1,306 @@ +<?php + +if (class_exists('ParagonIE_Sodium_Core32_Salsa20', false)) { + return; +} + +/** + * Class ParagonIE_Sodium_Core32_Salsa20 + */ +abstract class ParagonIE_Sodium_Core32_Salsa20 extends ParagonIE_Sodium_Core32_Util +{ + const ROUNDS = 20; + + /** + * Calculate an salsa20 hash of a single block + * + * @internal You should not use this directly from another application + * + * @param string $in + * @param string $k + * @param string|null $c + * @return string + * @throws SodiumException + * @throws TypeError + */ + public static function core_salsa20($in, $k, $c = null) + { + /** + * @var ParagonIE_Sodium_Core32_Int32 $x0 + * @var ParagonIE_Sodium_Core32_Int32 $x1 + * @var ParagonIE_Sodium_Core32_Int32 $x2 + * @var ParagonIE_Sodium_Core32_Int32 $x3 + * @var ParagonIE_Sodium_Core32_Int32 $x4 + * @var ParagonIE_Sodium_Core32_Int32 $x5 + * @var ParagonIE_Sodium_Core32_Int32 $x6 + * @var ParagonIE_Sodium_Core32_Int32 $x7 + * @var ParagonIE_Sodium_Core32_Int32 $x8 + * @var ParagonIE_Sodium_Core32_Int32 $x9 + * @var ParagonIE_Sodium_Core32_Int32 $x10 + * @var ParagonIE_Sodium_Core32_Int32 $x11 + * @var ParagonIE_Sodium_Core32_Int32 $x12 + * @var ParagonIE_Sodium_Core32_Int32 $x13 + * @var ParagonIE_Sodium_Core32_Int32 $x14 + * @var ParagonIE_Sodium_Core32_Int32 $x15 + * @var ParagonIE_Sodium_Core32_Int32 $j0 + * @var ParagonIE_Sodium_Core32_Int32 $j1 + * @var ParagonIE_Sodium_Core32_Int32 $j2 + * @var ParagonIE_Sodium_Core32_Int32 $j3 + * @var ParagonIE_Sodium_Core32_Int32 $j4 + * @var ParagonIE_Sodium_Core32_Int32 $j5 + * @var ParagonIE_Sodium_Core32_Int32 $j6 + * @var ParagonIE_Sodium_Core32_Int32 $j7 + * @var ParagonIE_Sodium_Core32_Int32 $j8 + * @var ParagonIE_Sodium_Core32_Int32 $j9 + * @var ParagonIE_Sodium_Core32_Int32 $j10 + * @var ParagonIE_Sodium_Core32_Int32 $j11 + * @var ParagonIE_Sodium_Core32_Int32 $j12 + * @var ParagonIE_Sodium_Core32_Int32 $j13 + * @var ParagonIE_Sodium_Core32_Int32 $j14 + * @var ParagonIE_Sodium_Core32_Int32 $j15 + */ + if (self::strlen($k) < 32) { + throw new RangeException('Key must be 32 bytes long'); + } + if ($c === null) { + $x0 = new ParagonIE_Sodium_Core32_Int32(array(0x6170, 0x7865)); + $x5 = new ParagonIE_Sodium_Core32_Int32(array(0x3320, 0x646e)); + $x10 = new ParagonIE_Sodium_Core32_Int32(array(0x7962, 0x2d32)); + $x15 = new ParagonIE_Sodium_Core32_Int32(array(0x6b20, 0x6574)); + } else { + $x0 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4)); + $x5 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4)); + $x10 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4)); + $x15 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4)); + } + $x1 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 0, 4)); + $x2 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 4, 4)); + $x3 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 8, 4)); + $x4 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 12, 4)); + $x6 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4)); + $x7 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4)); + $x8 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4)); + $x9 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4)); + $x11 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 16, 4)); + $x12 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 20, 4)); + $x13 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 24, 4)); + $x14 = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($k, 28, 4)); + + $j0 = clone $x0; + $j1 = clone $x1; + $j2 = clone $x2; + $j3 = clone $x3; + $j4 = clone $x4; + $j5 = clone $x5; + $j6 = clone $x6; + $j7 = clone $x7; + $j8 = clone $x8; + $j9 = clone $x9; + $j10 = clone $x10; + $j11 = clone $x11; + $j12 = clone $x12; + $j13 = clone $x13; + $j14 = clone $x14; + $j15 = clone $x15; + + for ($i = self::ROUNDS; $i > 0; $i -= 2) { + $x4 = $x4->xorInt32($x0->addInt32($x12)->rotateLeft(7)); + $x8 = $x8->xorInt32($x4->addInt32($x0)->rotateLeft(9)); + $x12 = $x12->xorInt32($x8->addInt32($x4)->rotateLeft(13)); + $x0 = $x0->xorInt32($x12->addInt32($x8)->rotateLeft(18)); + + $x9 = $x9->xorInt32($x5->addInt32($x1)->rotateLeft(7)); + $x13 = $x13->xorInt32($x9->addInt32($x5)->rotateLeft(9)); + $x1 = $x1->xorInt32($x13->addInt32($x9)->rotateLeft(13)); + $x5 = $x5->xorInt32($x1->addInt32($x13)->rotateLeft(18)); + + $x14 = $x14->xorInt32($x10->addInt32($x6)->rotateLeft(7)); + $x2 = $x2->xorInt32($x14->addInt32($x10)->rotateLeft(9)); + $x6 = $x6->xorInt32($x2->addInt32($x14)->rotateLeft(13)); + $x10 = $x10->xorInt32($x6->addInt32($x2)->rotateLeft(18)); + + $x3 = $x3->xorInt32($x15->addInt32($x11)->rotateLeft(7)); + $x7 = $x7->xorInt32($x3->addInt32($x15)->rotateLeft(9)); + $x11 = $x11->xorInt32($x7->addInt32($x3)->rotateLeft(13)); + $x15 = $x15->xorInt32($x11->addInt32($x7)->rotateLeft(18)); + + $x1 = $x1->xorInt32($x0->addInt32($x3)->rotateLeft(7)); + $x2 = $x2->xorInt32($x1->addInt32($x0)->rotateLeft(9)); + $x3 = $x3->xorInt32($x2->addInt32($x1)->rotateLeft(13)); + $x0 = $x0->xorInt32($x3->addInt32($x2)->rotateLeft(18)); + + $x6 = $x6->xorInt32($x5->addInt32($x4)->rotateLeft(7)); + $x7 = $x7->xorInt32($x6->addInt32($x5)->rotateLeft(9)); + $x4 = $x4->xorInt32($x7->addInt32($x6)->rotateLeft(13)); + $x5 = $x5->xorInt32($x4->addInt32($x7)->rotateLeft(18)); + + $x11 = $x11->xorInt32($x10->addInt32($x9)->rotateLeft(7)); + $x8 = $x8->xorInt32($x11->addInt32($x10)->rotateLeft(9)); + $x9 = $x9->xorInt32($x8->addInt32($x11)->rotateLeft(13)); + $x10 = $x10->xorInt32($x9->addInt32($x8)->rotateLeft(18)); + + $x12 = $x12->xorInt32($x15->addInt32($x14)->rotateLeft(7)); + $x13 = $x13->xorInt32($x12->addInt32($x15)->rotateLeft(9)); + $x14 = $x14->xorInt32($x13->addInt32($x12)->rotateLeft(13)); + $x15 = $x15->xorInt32($x14->addInt32($x13)->rotateLeft(18)); + } + + $x0 = $x0->addInt32($j0); + $x1 = $x1->addInt32($j1); + $x2 = $x2->addInt32($j2); + $x3 = $x3->addInt32($j3); + $x4 = $x4->addInt32($j4); + $x5 = $x5->addInt32($j5); + $x6 = $x6->addInt32($j6); + $x7 = $x7->addInt32($j7); + $x8 = $x8->addInt32($j8); + $x9 = $x9->addInt32($j9); + $x10 = $x10->addInt32($j10); + $x11 = $x11->addInt32($j11); + $x12 = $x12->addInt32($j12); + $x13 = $x13->addInt32($j13); + $x14 = $x14->addInt32($j14); + $x15 = $x15->addInt32($j15); + + return $x0->toReverseString() . + $x1->toReverseString() . + $x2->toReverseString() . + $x3->toReverseString() . + $x4->toReverseString() . + $x5->toReverseString() . + $x6->toReverseString() . + $x7->toReverseString() . + $x8->toReverseString() . + $x9->toReverseString() . + $x10->toReverseString() . + $x11->toReverseString() . + $x12->toReverseString() . + $x13->toReverseString() . + $x14->toReverseString() . + $x15->toReverseString(); + } + + /** + * @internal You should not use this directly from another application + * + * @param int $len + * @param string $nonce + * @param string $key + * @return string + * @throws SodiumException + * @throws TypeError + */ + public static function salsa20($len, $nonce, $key) + { + if (self::strlen($key) !== 32) { + throw new RangeException('Key must be 32 bytes long'); + } + $kcopy = '' . $key; + $in = self::substr($nonce, 0, 8) . str_repeat("\0", 8); + $c = ''; + while ($len >= 64) { + $c .= self::core_salsa20($in, $kcopy, null); + $u = 1; + // Internal counter. + for ($i = 8; $i < 16; ++$i) { + $u += self::chrToInt($in[$i]); + $in[$i] = self::intToChr($u & 0xff); + $u >>= 8; + } + $len -= 64; + } + if ($len > 0) { + $c .= self::substr( + self::core_salsa20($in, $kcopy, null), + 0, + $len + ); + } + try { + ParagonIE_Sodium_Compat::memzero($kcopy); + } catch (SodiumException $ex) { + $kcopy = null; + } + return $c; + } + + /** + * @internal You should not use this directly from another application + * + * @param string $m + * @param string $n + * @param int $ic + * @param string $k + * @return string + * @throws SodiumException + * @throws TypeError + */ + public static function salsa20_xor_ic($m, $n, $ic, $k) + { + $mlen = self::strlen($m); + if ($mlen < 1) { + return ''; + } + $kcopy = self::substr($k, 0, 32); + $in = self::substr($n, 0, 8); + // Initialize the counter + $in .= ParagonIE_Sodium_Core32_Util::store64_le($ic); + + $c = ''; + while ($mlen >= 64) { + $block = self::core_salsa20($in, $kcopy, null); + $c .= self::xorStrings( + self::substr($m, 0, 64), + self::substr($block, 0, 64) + ); + $u = 1; + for ($i = 8; $i < 16; ++$i) { + $u += self::chrToInt($in[$i]); + $in[$i] = self::intToChr($u & 0xff); + $u >>= 8; + } + + $mlen -= 64; + $m = self::substr($m, 64); + } + + if ($mlen) { + $block = self::core_salsa20($in, $kcopy, null); + $c .= self::xorStrings( + self::substr($m, 0, $mlen), + self::substr($block, 0, $mlen) + ); + } + try { + ParagonIE_Sodium_Compat::memzero($block); + ParagonIE_Sodium_Compat::memzero($kcopy); + } catch (SodiumException $ex) { + $block = null; + $kcopy = null; + } + + return $c; + } + + /** + * @internal You should not use this directly from another application + * + * @param string $message + * @param string $nonce + * @param string $key + * @return string + * @throws SodiumException + * @throws TypeError + */ + public static function salsa20_xor($message, $nonce, $key) + { + return self::xorStrings( + $message, + self::salsa20( + self::strlen($message), + $nonce, + $key + ) + ); + } +} |