--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/sodium_compat/src/Core/Salsa20.php Mon Oct 14 18:28:13 2019 +0200
@@ -0,0 +1,273 @@
+<?php
+
+if (class_exists('ParagonIE_Sodium_Core_Salsa20', false)) {
+ return;
+}
+
+/**
+ * Class ParagonIE_Sodium_Core_Salsa20
+ */
+abstract class ParagonIE_Sodium_Core_Salsa20 extends ParagonIE_Sodium_Core_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 $c
+ * @return string
+ * @throws TypeError
+ */
+ public static function core_salsa20($in, $k, $c = null)
+ {
+ if (self::strlen($k) < 32) {
+ throw new RangeException('Key must be 32 bytes long');
+ }
+ if ($c === null) {
+ $j0 = $x0 = 0x61707865;
+ $j5 = $x5 = 0x3320646e;
+ $j10 = $x10 = 0x79622d32;
+ $j15 = $x15 = 0x6b206574;
+ } else {
+ $j0 = $x0 = self::load_4(self::substr($c, 0, 4));
+ $j5 = $x5 = self::load_4(self::substr($c, 4, 4));
+ $j10 = $x10 = self::load_4(self::substr($c, 8, 4));
+ $j15 = $x15 = self::load_4(self::substr($c, 12, 4));
+ }
+ $j1 = $x1 = self::load_4(self::substr($k, 0, 4));
+ $j2 = $x2 = self::load_4(self::substr($k, 4, 4));
+ $j3 = $x3 = self::load_4(self::substr($k, 8, 4));
+ $j4 = $x4 = self::load_4(self::substr($k, 12, 4));
+ $j6 = $x6 = self::load_4(self::substr($in, 0, 4));
+ $j7 = $x7 = self::load_4(self::substr($in, 4, 4));
+ $j8 = $x8 = self::load_4(self::substr($in, 8, 4));
+ $j9 = $x9 = self::load_4(self::substr($in, 12, 4));
+ $j11 = $x11 = self::load_4(self::substr($k, 16, 4));
+ $j12 = $x12 = self::load_4(self::substr($k, 20, 4));
+ $j13 = $x13 = self::load_4(self::substr($k, 24, 4));
+ $j14 = $x14 = self::load_4(self::substr($k, 28, 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);
+ }
+
+ $x0 += $j0;
+ $x1 += $j1;
+ $x2 += $j2;
+ $x3 += $j3;
+ $x4 += $j4;
+ $x5 += $j5;
+ $x6 += $j6;
+ $x7 += $j7;
+ $x8 += $j8;
+ $x9 += $j9;
+ $x10 += $j10;
+ $x11 += $j11;
+ $x12 += $j12;
+ $x13 += $j13;
+ $x14 += $j14;
+ $x15 += $j15;
+
+ return self::store32_le($x0) .
+ self::store32_le($x1) .
+ self::store32_le($x2) .
+ self::store32_le($x3) .
+ self::store32_le($x4) .
+ self::store32_le($x5) .
+ self::store32_le($x6) .
+ self::store32_le($x7) .
+ self::store32_le($x8) .
+ self::store32_le($x9) .
+ self::store32_le($x10) .
+ self::store32_le($x11) .
+ self::store32_le($x12) .
+ self::store32_le($x13) .
+ self::store32_le($x14) .
+ self::store32_le($x15);
+ }
+
+ /**
+ * @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
+ $in .= ParagonIE_Sodium_Core_Util::store64_le($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
+ )
+ );
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param int $u
+ * @param int $c
+ * @return int
+ */
+ public static function rotate($u, $c)
+ {
+ $u &= 0xffffffff;
+ $c %= 32;
+ return (int) (0xffffffff & (
+ ($u << $c)
+ |
+ ($u >> (32 - $c))
+ )
+ );
+ }
+}