diff options
Diffstat (limited to '')
| -rw-r--r-- | vendor/paragonie/sodium_compat/src/Core/HChaCha20.php | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/vendor/paragonie/sodium_compat/src/Core/HChaCha20.php b/vendor/paragonie/sodium_compat/src/Core/HChaCha20.php new file mode 100644 index 0000000..947df10 --- /dev/null +++ b/vendor/paragonie/sodium_compat/src/Core/HChaCha20.php @@ -0,0 +1,108 @@ +<?php + +if (class_exists('ParagonIE_Sodium_Core_HChaCha20', false)) { + return; +} + +/** + * Class ParagonIE_Sodium_Core_HChaCha20 + */ +class ParagonIE_Sodium_Core_HChaCha20 extends ParagonIE_Sodium_Core_ChaCha20 +{ + /** + * @param string $in + * @param string $key + * @param string|null $c + * @return string + * @throws TypeError + */ + public static function hChaCha20($in = '', $key = '', $c = null) + { + $ctx = array(); + + if ($c === null) { + $ctx[0] = 0x61707865; + $ctx[1] = 0x3320646e; + $ctx[2] = 0x79622d32; + $ctx[3] = 0x6b206574; + } else { + $ctx[0] = self::load_4(self::substr($c, 0, 4)); + $ctx[1] = self::load_4(self::substr($c, 4, 4)); + $ctx[2] = self::load_4(self::substr($c, 8, 4)); + $ctx[3] = self::load_4(self::substr($c, 12, 4)); + } + $ctx[4] = self::load_4(self::substr($key, 0, 4)); + $ctx[5] = self::load_4(self::substr($key, 4, 4)); + $ctx[6] = self::load_4(self::substr($key, 8, 4)); + $ctx[7] = self::load_4(self::substr($key, 12, 4)); + $ctx[8] = self::load_4(self::substr($key, 16, 4)); + $ctx[9] = self::load_4(self::substr($key, 20, 4)); + $ctx[10] = self::load_4(self::substr($key, 24, 4)); + $ctx[11] = self::load_4(self::substr($key, 28, 4)); + $ctx[12] = self::load_4(self::substr($in, 0, 4)); + $ctx[13] = self::load_4(self::substr($in, 4, 4)); + $ctx[14] = self::load_4(self::substr($in, 8, 4)); + $ctx[15] = self::load_4(self::substr($in, 12, 4)); + return self::hChaCha20Bytes($ctx); + } + + /** + * @param array $ctx + * @return string + * @throws TypeError + */ + protected static function hChaCha20Bytes(array $ctx) + { + $x0 = (int) $ctx[0]; + $x1 = (int) $ctx[1]; + $x2 = (int) $ctx[2]; + $x3 = (int) $ctx[3]; + $x4 = (int) $ctx[4]; + $x5 = (int) $ctx[5]; + $x6 = (int) $ctx[6]; + $x7 = (int) $ctx[7]; + $x8 = (int) $ctx[8]; + $x9 = (int) $ctx[9]; + $x10 = (int) $ctx[10]; + $x11 = (int) $ctx[11]; + $x12 = (int) $ctx[12]; + $x13 = (int) $ctx[13]; + $x14 = (int) $ctx[14]; + $x15 = (int) $ctx[15]; + + for ($i = 0; $i < 10; ++$i) { + # QUARTERROUND( x0, x4, x8, x12) + list($x0, $x4, $x8, $x12) = self::quarterRound($x0, $x4, $x8, $x12); + + # QUARTERROUND( x1, x5, x9, x13) + list($x1, $x5, $x9, $x13) = self::quarterRound($x1, $x5, $x9, $x13); + + # QUARTERROUND( x2, x6, x10, x14) + list($x2, $x6, $x10, $x14) = self::quarterRound($x2, $x6, $x10, $x14); + + # QUARTERROUND( x3, x7, x11, x15) + list($x3, $x7, $x11, $x15) = self::quarterRound($x3, $x7, $x11, $x15); + + # QUARTERROUND( x0, x5, x10, x15) + list($x0, $x5, $x10, $x15) = self::quarterRound($x0, $x5, $x10, $x15); + + # QUARTERROUND( x1, x6, x11, x12) + list($x1, $x6, $x11, $x12) = self::quarterRound($x1, $x6, $x11, $x12); + + # QUARTERROUND( x2, x7, x8, x13) + list($x2, $x7, $x8, $x13) = self::quarterRound($x2, $x7, $x8, $x13); + + # QUARTERROUND( x3, x4, x9, x14) + list($x3, $x4, $x9, $x14) = self::quarterRound($x3, $x4, $x9, $x14); + } + + return self::store32_le((int) ($x0 & 0xffffffff)) . + self::store32_le((int) ($x1 & 0xffffffff)) . + self::store32_le((int) ($x2 & 0xffffffff)) . + self::store32_le((int) ($x3 & 0xffffffff)) . + self::store32_le((int) ($x12 & 0xffffffff)) . + self::store32_le((int) ($x13 & 0xffffffff)) . + self::store32_le((int) ($x14 & 0xffffffff)) . + self::store32_le((int) ($x15 & 0xffffffff)); + } +} |