diff -r c7c34916027a -r 177826044cd9 wp/wp-includes/sodium_compat/src/Core32/Salsa20.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/sodium_compat/src/Core32/Salsa20.php	Mon Oct 14 18:28:13 2019 +0200
@@ -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
+            )
+        );
+    }
+}