1 files changed, 345 insertions, 0 deletions
diff --git a/vendor/paragonie/sodium_compat/src/Core32/X25519.php b/vendor/paragonie/sodium_compat/src/Core32/X25519.php
new file mode 100644
index 0000000..2cc000d
--- /dev/null
+++ b/vendor/paragonie/sodium_compat/src/Core32/X25519.php
@@ -0,0 +1,345 @@
+<?php
+
+if (class_exists('ParagonIE_Sodium_Core32_X25519', false)) {
+    return;
+}
+
+/**
+ * Class ParagonIE_Sodium_Core32_X25519
+ */
+abstract class ParagonIE_Sodium_Core32_X25519 extends ParagonIE_Sodium_Core32_Curve25519
+{
+    /**
+     * Alters the objects passed to this method in place.
+     *
+     * @internal You should not use this directly from another application
+     *
+     * @param ParagonIE_Sodium_Core32_Curve25519_Fe $f
+     * @param ParagonIE_Sodium_Core32_Curve25519_Fe $g
+     * @param int $b
+     * @return void
+     * @throws SodiumException
+     * @throws TypeError
+     * @psalm-suppress MixedMethodCall
+     */
+    public static function fe_cswap(
+        ParagonIE_Sodium_Core32_Curve25519_Fe $f,
+        ParagonIE_Sodium_Core32_Curve25519_Fe $g,
+        $b = 0
+    ) {
+        $f0 = (int) $f[0]->toInt();
+        $f1 = (int) $f[1]->toInt();
+        $f2 = (int) $f[2]->toInt();
+        $f3 = (int) $f[3]->toInt();
+        $f4 = (int) $f[4]->toInt();
+        $f5 = (int) $f[5]->toInt();
+        $f6 = (int) $f[6]->toInt();
+        $f7 = (int) $f[7]->toInt();
+        $f8 = (int) $f[8]->toInt();
+        $f9 = (int) $f[9]->toInt();
+        $g0 = (int) $g[0]->toInt();
+        $g1 = (int) $g[1]->toInt();
+        $g2 = (int) $g[2]->toInt();
+        $g3 = (int) $g[3]->toInt();
+        $g4 = (int) $g[4]->toInt();
+        $g5 = (int) $g[5]->toInt();
+        $g6 = (int) $g[6]->toInt();
+        $g7 = (int) $g[7]->toInt();
+        $g8 = (int) $g[8]->toInt();
+        $g9 = (int) $g[9]->toInt();
+        $b = -$b;
+        /** @var int $x0 */
+        $x0 = ($f0 ^ $g0) & $b;
+        /** @var int $x1 */
+        $x1 = ($f1 ^ $g1) & $b;
+        /** @var int $x2 */
+        $x2 = ($f2 ^ $g2) & $b;
+        /** @var int $x3 */
+        $x3 = ($f3 ^ $g3) & $b;
+        /** @var int $x4 */
+        $x4 = ($f4 ^ $g4) & $b;
+        /** @var int $x5 */
+        $x5 = ($f5 ^ $g5) & $b;
+        /** @var int $x6 */
+        $x6 = ($f6 ^ $g6) & $b;
+        /** @var int $x7 */
+        $x7 = ($f7 ^ $g7) & $b;
+        /** @var int $x8 */
+        $x8 = ($f8 ^ $g8) & $b;
+        /** @var int $x9 */
+        $x9 = ($f9 ^ $g9) & $b;
+        $f[0] = ParagonIE_Sodium_Core32_Int32::fromInt($f0 ^ $x0);
+        $f[1] = ParagonIE_Sodium_Core32_Int32::fromInt($f1 ^ $x1);
+        $f[2] = ParagonIE_Sodium_Core32_Int32::fromInt($f2 ^ $x2);
+        $f[3] = ParagonIE_Sodium_Core32_Int32::fromInt($f3 ^ $x3);
+        $f[4] = ParagonIE_Sodium_Core32_Int32::fromInt($f4 ^ $x4);
+        $f[5] = ParagonIE_Sodium_Core32_Int32::fromInt($f5 ^ $x5);
+        $f[6] = ParagonIE_Sodium_Core32_Int32::fromInt($f6 ^ $x6);
+        $f[7] = ParagonIE_Sodium_Core32_Int32::fromInt($f7 ^ $x7);
+        $f[8] = ParagonIE_Sodium_Core32_Int32::fromInt($f8 ^ $x8);
+        $f[9] = ParagonIE_Sodium_Core32_Int32::fromInt($f9 ^ $x9);
+        $g[0] = ParagonIE_Sodium_Core32_Int32::fromInt($g0 ^ $x0);
+        $g[1] = ParagonIE_Sodium_Core32_Int32::fromInt($g1 ^ $x1);
+        $g[2] = ParagonIE_Sodium_Core32_Int32::fromInt($g2 ^ $x2);
+        $g[3] = ParagonIE_Sodium_Core32_Int32::fromInt($g3 ^ $x3);
+        $g[4] = ParagonIE_Sodium_Core32_Int32::fromInt($g4 ^ $x4);
+        $g[5] = ParagonIE_Sodium_Core32_Int32::fromInt($g5 ^ $x5);
+        $g[6] = ParagonIE_Sodium_Core32_Int32::fromInt($g6 ^ $x6);
+        $g[7] = ParagonIE_Sodium_Core32_Int32::fromInt($g7 ^ $x7);
+        $g[8] = ParagonIE_Sodium_Core32_Int32::fromInt($g8 ^ $x8);
+        $g[9] = ParagonIE_Sodium_Core32_Int32::fromInt($g9 ^ $x9);
+    }
+
+    /**
+     * @internal You should not use this directly from another application
+     *
+     * @param ParagonIE_Sodium_Core32_Curve25519_Fe $f
+     * @return ParagonIE_Sodium_Core32_Curve25519_Fe
+     * @throws SodiumException
+     * @throws TypeError
+     * @psalm-suppress MixedAssignment
+     * @psalm-suppress MixedMethodCall
+     */
+    public static function fe_mul121666(ParagonIE_Sodium_Core32_Curve25519_Fe $f)
+    {
+        /** @var array<int, ParagonIE_Sodium_Core32_Int64> $h */
+        $h = array();
+        for ($i = 0; $i < 10; ++$i) {
+            $h[$i] = $f[$i]->toInt64()->mulInt(121666, 17);
+        }
+
+        $carry9 = $h[9]->addInt(1 << 24)->shiftRight(25);
+        $h[0] = $h[0]->addInt64($carry9->mulInt(19, 5));
+        $h[9] = $h[9]->subInt64($carry9->shiftLeft(25));
+
+        $carry1 = $h[1]->addInt(1 << 24)->shiftRight(25);
+        $h[2] = $h[2]->addInt64($carry1);
+        $h[1] = $h[1]->subInt64($carry1->shiftLeft(25));
+
+        $carry3 = $h[3]->addInt(1 << 24)->shiftRight(25);
+        $h[4] = $h[4]->addInt64($carry3);
+        $h[3] = $h[3]->subInt64($carry3->shiftLeft(25));
+
+        $carry5 = $h[5]->addInt(1 << 24)->shiftRight(25);
+        $h[6] = $h[6]->addInt64($carry5);
+        $h[5] = $h[5]->subInt64($carry5->shiftLeft(25));
+
+        $carry7 = $h[7]->addInt(1 << 24)->shiftRight(25);
+        $h[8] = $h[8]->addInt64($carry7);
+        $h[7] = $h[7]->subInt64($carry7->shiftLeft(25));
+
+        $carry0 = $h[0]->addInt(1 << 25)->shiftRight(26);
+        $h[1] = $h[1]->addInt64($carry0);
+        $h[0] = $h[0]->subInt64($carry0->shiftLeft(26));
+
+        $carry2 = $h[2]->addInt(1 << 25)->shiftRight(26);
+        $h[3] = $h[3]->addInt64($carry2);
+        $h[2] = $h[2]->subInt64($carry2->shiftLeft(26));
+
+        $carry4 = $h[4]->addInt(1 << 25)->shiftRight(26);
+        $h[5] = $h[5]->addInt64($carry4);
+        $h[4] = $h[4]->subInt64($carry4->shiftLeft(26));
+
+        $carry6 = $h[6]->addInt(1 << 25)->shiftRight(26);
+        $h[7] = $h[7]->addInt64($carry6);
+        $h[6] = $h[6]->subInt64($carry6->shiftLeft(26));
+
+        $carry8 = $h[8]->addInt(1 << 25)->shiftRight(26);
+        $h[9] = $h[9]->addInt64($carry8);
+        $h[8] = $h[8]->subInt64($carry8->shiftLeft(26));
+
+        for ($i = 0; $i < 10; ++$i) {
+            $h[$i] = $h[$i]->toInt32();
+        }
+        /** @var array<int, ParagonIE_Sodium_Core32_Int32> $h2 */
+        $h2 = $h;
+        return ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray($h2);
+    }
+
+    /**
+     * @internal You should not use this directly from another application
+     *
+     * Inline comments preceded by # are from libsodium's ref10 code.
+     *
+     * @param string $n
+     * @param string $p
+     * @return string
+     * @throws SodiumException
+     * @throws TypeError
+     */
+    public static function crypto_scalarmult_curve25519_ref10($n, $p)
+    {
+        # for (i = 0;i < 32;++i) e[i] = n[i];
+        $e = '' . $n;
+        # e[0] &= 248;
+        $e[0] = self::intToChr(
+            self::chrToInt($e[0]) & 248
+        );
+        # e[31] &= 127;
+        # e[31] |= 64;
+        $e[31] = self::intToChr(
+            (self::chrToInt($e[31]) & 127) | 64
+        );
+        # fe_frombytes(x1,p);
+        $x1 = self::fe_frombytes($p);
+        # fe_1(x2);
+        $x2 = self::fe_1();
+        # fe_0(z2);
+        $z2 = self::fe_0();
+        # fe_copy(x3,x1);
+        $x3 = self::fe_copy($x1);
+        # fe_1(z3);
+        $z3 = self::fe_1();
+
+        # swap = 0;
+        /** @var int $swap */
+        $swap = 0;
+
+        # for (pos = 254;pos >= 0;--pos) {
+        for ($pos = 254; $pos >= 0; --$pos) {
+            # b = e[pos / 8] >> (pos & 7);
+            /** @var int $b */
+            $b = self::chrToInt(
+                    $e[(int) floor($pos / 8)]
+                ) >> ($pos & 7);
+            # b &= 1;
+            $b &= 1;
+
+            # swap ^= b;
+            $swap ^= $b;
+
+            # fe_cswap(x2,x3,swap);
+            self::fe_cswap($x2, $x3, $swap);
+
+            # fe_cswap(z2,z3,swap);
+            self::fe_cswap($z2, $z3, $swap);
+
+            # swap = b;
+            /** @var int $swap */
+            $swap = $b;
+
+            # fe_sub(tmp0,x3,z3);
+            $tmp0 = self::fe_sub($x3, $z3);
+
+            # fe_sub(tmp1,x2,z2);
+            $tmp1 = self::fe_sub($x2, $z2);
+
+            # fe_add(x2,x2,z2);
+            $x2 = self::fe_add($x2, $z2);
+
+            # fe_add(z2,x3,z3);
+            $z2 = self::fe_add($x3, $z3);
+
+            # fe_mul(z3,tmp0,x2);
+            $z3 = self::fe_mul($tmp0, $x2);
+
+            # fe_mul(z2,z2,tmp1);
+            $z2 = self::fe_mul($z2, $tmp1);
+
+            # fe_sq(tmp0,tmp1);
+            $tmp0 = self::fe_sq($tmp1);
+
+            # fe_sq(tmp1,x2);
+            $tmp1 = self::fe_sq($x2);
+
+            # fe_add(x3,z3,z2);
+            $x3 = self::fe_add($z3, $z2);
+
+            # fe_sub(z2,z3,z2);
+            $z2 = self::fe_sub($z3, $z2);
+
+            # fe_mul(x2,tmp1,tmp0);
+            $x2 = self::fe_mul($tmp1, $tmp0);
+
+            # fe_sub(tmp1,tmp1,tmp0);
+            $tmp1 = self::fe_sub($tmp1, $tmp0);
+
+            # fe_sq(z2,z2);
+            $z2 = self::fe_sq($z2);
+
+            # fe_mul121666(z3,tmp1);
+            $z3 = self::fe_mul121666($tmp1);
+
+            # fe_sq(x3,x3);
+            $x3 = self::fe_sq($x3);
+
+            # fe_add(tmp0,tmp0,z3);
+            $tmp0 = self::fe_add($tmp0, $z3);
+
+            # fe_mul(z3,x1,z2);
+            $z3 = self::fe_mul($x1, $z2);
+
+            # fe_mul(z2,tmp1,tmp0);
+            $z2 = self::fe_mul($tmp1, $tmp0);
+        }
+
+        # fe_cswap(x2,x3,swap);
+        self::fe_cswap($x2, $x3, $swap);
+
+        # fe_cswap(z2,z3,swap);
+        self::fe_cswap($z2, $z3, $swap);
+
+        # fe_invert(z2,z2);
+        $z2 = self::fe_invert($z2);
+
+        # fe_mul(x2,x2,z2);
+        $x2 = self::fe_mul($x2, $z2);
+        # fe_tobytes(q,x2);
+        return (string) self::fe_tobytes($x2);
+    }
+
+    /**
+     * @internal You should not use this directly from another application
+     *
+     * @param ParagonIE_Sodium_Core32_Curve25519_Fe $edwardsY
+     * @param ParagonIE_Sodium_Core32_Curve25519_Fe $edwardsZ
+     * @return ParagonIE_Sodium_Core32_Curve25519_Fe
+     * @throws SodiumException
+     * @throws TypeError
+     */
+    public static function edwards_to_montgomery(
+        ParagonIE_Sodium_Core32_Curve25519_Fe $edwardsY,
+        ParagonIE_Sodium_Core32_Curve25519_Fe $edwardsZ
+    ) {
+        $tempX = self::fe_add($edwardsZ, $edwardsY);
+        $tempZ = self::fe_sub($edwardsZ, $edwardsY);
+        $tempZ = self::fe_invert($tempZ);
+        return self::fe_mul($tempX, $tempZ);
+    }
+
+    /**
+     * @internal You should not use this directly from another application
+     *
+     * @param string $n
+     * @return string
+     * @throws SodiumException
+     * @throws TypeError
+     */
+    public static function crypto_scalarmult_curve25519_ref10_base($n)
+    {
+        # for (i = 0;i < 32;++i) e[i] = n[i];
+        $e = '' . $n;
+
+        # e[0] &= 248;
+        $e[0] = self::intToChr(
+            self::chrToInt($e[0]) & 248
+        );
+
+        # e[31] &= 127;
+        # e[31] |= 64;
+        $e[31] = self::intToChr(
+            (self::chrToInt($e[31]) & 127) | 64
+        );
+
+        $A = self::ge_scalarmult_base($e);
+        if (
+            !($A->Y instanceof ParagonIE_Sodium_Core32_Curve25519_Fe)
+                ||
+            !($A->Z instanceof ParagonIE_Sodium_Core32_Curve25519_Fe)
+        ) {
+            throw new TypeError('Null points encountered');
+        }
+        $pk = self::edwards_to_montgomery($A->Y, $A->Z);
+        return self::fe_tobytes($pk);
+    }
+}