diff -r c7c34916027a -r 177826044cd9 wp/wp-includes/sodium_compat/src/Core32/HChaCha20.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/sodium_compat/src/Core32/HChaCha20.php	Mon Oct 14 18:28:13 2019 +0200
@@ -0,0 +1,127 @@
+<?php
+
+if (class_exists('ParagonIE_Sodium_Core32_HChaCha20', false)) {
+    return;
+}
+
+/**
+ * Class ParagonIE_Sodium_Core_HChaCha20
+ */
+class ParagonIE_Sodium_Core32_HChaCha20 extends ParagonIE_Sodium_Core32_ChaCha20
+{
+    /**
+     * @param string $in
+     * @param string $key
+     * @param string|null $c
+     * @return string
+     * @throws SodiumException
+     * @throws TypeError
+     */
+    public static function hChaCha20($in = '', $key = '', $c = null)
+    {
+        $ctx = array();
+
+        if ($c === null) {
+            $ctx[0] = new ParagonIE_Sodium_Core32_Int32(array(0x6170, 0x7865));
+            $ctx[1] = new ParagonIE_Sodium_Core32_Int32(array(0x3320, 0x646e));
+            $ctx[2] = new ParagonIE_Sodium_Core32_Int32(array(0x7962, 0x2d32));
+            $ctx[3] = new ParagonIE_Sodium_Core32_Int32(array(0x6b20, 0x6574));
+        } else {
+            $ctx[0] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 0, 4));
+            $ctx[1] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 4, 4));
+            $ctx[2] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 8, 4));
+            $ctx[3] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($c, 12, 4));
+        }
+        $ctx[4]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 0, 4));
+        $ctx[5]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 4, 4));
+        $ctx[6]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 8, 4));
+        $ctx[7]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 12, 4));
+        $ctx[8]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 16, 4));
+        $ctx[9]  = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 20, 4));
+        $ctx[10] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 24, 4));
+        $ctx[11] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($key, 28, 4));
+        $ctx[12] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 0, 4));
+        $ctx[13] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 4, 4));
+        $ctx[14] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 8, 4));
+        $ctx[15] = ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($in, 12, 4));
+
+        return self::hChaCha20Bytes($ctx);
+    }
+
+    /**
+     * @param array $ctx
+     * @return string
+     * @throws SodiumException
+     * @throws TypeError
+     */
+    protected static function hChaCha20Bytes(array $ctx)
+    {
+        /** @var ParagonIE_Sodium_Core32_Int32 $x0 */
+        $x0  = $ctx[0];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x1 */
+        $x1  = $ctx[1];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x2 */
+        $x2  = $ctx[2];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x3 */
+        $x3  = $ctx[3];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x4 */
+        $x4  = $ctx[4];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x5 */
+        $x5  = $ctx[5];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x6 */
+        $x6  = $ctx[6];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x7 */
+        $x7  = $ctx[7];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x8 */
+        $x8  = $ctx[8];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x9 */
+        $x9  = $ctx[9];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x10 */
+        $x10 = $ctx[10];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x11 */
+        $x11 = $ctx[11];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x12 */
+        $x12 = $ctx[12];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x13 */
+        $x13 = $ctx[13];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x14 */
+        $x14 = $ctx[14];
+        /** @var ParagonIE_Sodium_Core32_Int32 $x15 */
+        $x15 = $ctx[15];
+
+        for ($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 $x0->toReverseString() .
+            $x1->toReverseString() .
+            $x2->toReverseString() .
+            $x3->toReverseString() .
+            $x12->toReverseString() .
+            $x13->toReverseString() .
+            $x14->toReverseString() .
+            $x15->toReverseString();
+    }
+}