diff options
Diffstat (limited to '')
| -rw-r--r-- | vendor/paragonie/sodium_compat/src/Core/HSalsa20.php | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/vendor/paragonie/sodium_compat/src/Core/HSalsa20.php b/vendor/paragonie/sodium_compat/src/Core/HSalsa20.php new file mode 100644 index 0000000..35ee79e --- /dev/null +++ b/vendor/paragonie/sodium_compat/src/Core/HSalsa20.php @@ -0,0 +1,96 @@ +<?php + +if (class_exists('ParagonIE_Sodium_Core_HSalsa20', false)) { + return; +} + +/** + * Class ParagonIE_Sodium_Core_HSalsa20 + */ +abstract class ParagonIE_Sodium_Core_HSalsa20 extends ParagonIE_Sodium_Core_Salsa20 +{ + /** + * Calculate an hsalsa20 hash of a single block + * + * HSalsa20 doesn't have a counter and will never be used for more than + * one block (used to derive a subkey for xsalsa20). + * + * @internal You should not use this directly from another application + * + * @param string $in + * @param string $k + * @param string|null $c + * @return string + * @throws TypeError + */ + public static function hsalsa20($in, $k, $c = null) + { + if ($c === null) { + $x0 = 0x61707865; + $x5 = 0x3320646e; + $x10 = 0x79622d32; + $x15 = 0x6b206574; + } else { + $x0 = self::load_4(self::substr($c, 0, 4)); + $x5 = self::load_4(self::substr($c, 4, 4)); + $x10 = self::load_4(self::substr($c, 8, 4)); + $x15 = self::load_4(self::substr($c, 12, 4)); + } + $x1 = self::load_4(self::substr($k, 0, 4)); + $x2 = self::load_4(self::substr($k, 4, 4)); + $x3 = self::load_4(self::substr($k, 8, 4)); + $x4 = self::load_4(self::substr($k, 12, 4)); + $x11 = self::load_4(self::substr($k, 16, 4)); + $x12 = self::load_4(self::substr($k, 20, 4)); + $x13 = self::load_4(self::substr($k, 24, 4)); + $x14 = self::load_4(self::substr($k, 28, 4)); + $x6 = self::load_4(self::substr($in, 0, 4)); + $x7 = self::load_4(self::substr($in, 4, 4)); + $x8 = self::load_4(self::substr($in, 8, 4)); + $x9 = self::load_4(self::substr($in, 12, 4)); + + for ($i = self::ROUNDS; $i > 0; $i -= 2) { + $x4 ^= self::rotate($x0 + $x12, 7); + $x8 ^= self::rotate($x4 + $x0, 9); + $x12 ^= self::rotate($x8 + $x4, 13); + $x0 ^= self::rotate($x12 + $x8, 18); + $x9 ^= self::rotate($x5 + $x1, 7); + $x13 ^= self::rotate($x9 + $x5, 9); + $x1 ^= self::rotate($x13 + $x9, 13); + $x5 ^= self::rotate($x1 + $x13, 18); + $x14 ^= self::rotate($x10 + $x6, 7); + $x2 ^= self::rotate($x14 + $x10, 9); + $x6 ^= self::rotate($x2 + $x14, 13); + $x10 ^= self::rotate($x6 + $x2, 18); + $x3 ^= self::rotate($x15 + $x11, 7); + $x7 ^= self::rotate($x3 + $x15, 9); + $x11 ^= self::rotate($x7 + $x3, 13); + $x15 ^= self::rotate($x11 + $x7, 18); + $x1 ^= self::rotate($x0 + $x3, 7); + $x2 ^= self::rotate($x1 + $x0, 9); + $x3 ^= self::rotate($x2 + $x1, 13); + $x0 ^= self::rotate($x3 + $x2, 18); + $x6 ^= self::rotate($x5 + $x4, 7); + $x7 ^= self::rotate($x6 + $x5, 9); + $x4 ^= self::rotate($x7 + $x6, 13); + $x5 ^= self::rotate($x4 + $x7, 18); + $x11 ^= self::rotate($x10 + $x9, 7); + $x8 ^= self::rotate($x11 + $x10, 9); + $x9 ^= self::rotate($x8 + $x11, 13); + $x10 ^= self::rotate($x9 + $x8, 18); + $x12 ^= self::rotate($x15 + $x14, 7); + $x13 ^= self::rotate($x12 + $x15, 9); + $x14 ^= self::rotate($x13 + $x12, 13); + $x15 ^= self::rotate($x14 + $x13, 18); + } + + return self::store32_le($x0) . + self::store32_le($x5) . + self::store32_le($x10) . + self::store32_le($x15) . + self::store32_le($x6) . + self::store32_le($x7) . + self::store32_le($x8) . + self::store32_le($x9); + } +} |