--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/sodium_compat/src/Core/X25519.php Mon Oct 14 18:28:13 2019 +0200
@@ -0,0 +1,327 @@
+<?php
+
+if (class_exists('ParagonIE_Sodium_Core_X25519', false)) {
+ return;
+}
+
+/**
+ * Class ParagonIE_Sodium_Core_X25519
+ */
+abstract class ParagonIE_Sodium_Core_X25519 extends ParagonIE_Sodium_Core_Curve25519
+{
+ /**
+ * Alters the objects passed to this method in place.
+ *
+ * @internal You should not use this directly from another application
+ *
+ * @param ParagonIE_Sodium_Core_Curve25519_Fe $f
+ * @param ParagonIE_Sodium_Core_Curve25519_Fe $g
+ * @param int $b
+ * @return void
+ * @psalm-suppress MixedAssignment
+ */
+ public static function fe_cswap(
+ ParagonIE_Sodium_Core_Curve25519_Fe $f,
+ ParagonIE_Sodium_Core_Curve25519_Fe $g,
+ $b = 0
+ ) {
+ $f0 = (int) $f[0];
+ $f1 = (int) $f[1];
+ $f2 = (int) $f[2];
+ $f3 = (int) $f[3];
+ $f4 = (int) $f[4];
+ $f5 = (int) $f[5];
+ $f6 = (int) $f[6];
+ $f7 = (int) $f[7];
+ $f8 = (int) $f[8];
+ $f9 = (int) $f[9];
+ $g0 = (int) $g[0];
+ $g1 = (int) $g[1];
+ $g2 = (int) $g[2];
+ $g3 = (int) $g[3];
+ $g4 = (int) $g[4];
+ $g5 = (int) $g[5];
+ $g6 = (int) $g[6];
+ $g7 = (int) $g[7];
+ $g8 = (int) $g[8];
+ $g9 = (int) $g[9];
+ $b = -$b;
+ $x0 = ($f0 ^ $g0) & $b;
+ $x1 = ($f1 ^ $g1) & $b;
+ $x2 = ($f2 ^ $g2) & $b;
+ $x3 = ($f3 ^ $g3) & $b;
+ $x4 = ($f4 ^ $g4) & $b;
+ $x5 = ($f5 ^ $g5) & $b;
+ $x6 = ($f6 ^ $g6) & $b;
+ $x7 = ($f7 ^ $g7) & $b;
+ $x8 = ($f8 ^ $g8) & $b;
+ $x9 = ($f9 ^ $g9) & $b;
+ $f[0] = $f0 ^ $x0;
+ $f[1] = $f1 ^ $x1;
+ $f[2] = $f2 ^ $x2;
+ $f[3] = $f3 ^ $x3;
+ $f[4] = $f4 ^ $x4;
+ $f[5] = $f5 ^ $x5;
+ $f[6] = $f6 ^ $x6;
+ $f[7] = $f7 ^ $x7;
+ $f[8] = $f8 ^ $x8;
+ $f[9] = $f9 ^ $x9;
+ $g[0] = $g0 ^ $x0;
+ $g[1] = $g1 ^ $x1;
+ $g[2] = $g2 ^ $x2;
+ $g[3] = $g3 ^ $x3;
+ $g[4] = $g4 ^ $x4;
+ $g[5] = $g5 ^ $x5;
+ $g[6] = $g6 ^ $x6;
+ $g[7] = $g7 ^ $x7;
+ $g[8] = $g8 ^ $x8;
+ $g[9] = $g9 ^ $x9;
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param ParagonIE_Sodium_Core_Curve25519_Fe $f
+ * @return ParagonIE_Sodium_Core_Curve25519_Fe
+ */
+ public static function fe_mul121666(ParagonIE_Sodium_Core_Curve25519_Fe $f)
+ {
+ $h = array(
+ self::mul((int) $f[0], 121666, 17),
+ self::mul((int) $f[1], 121666, 17),
+ self::mul((int) $f[2], 121666, 17),
+ self::mul((int) $f[3], 121666, 17),
+ self::mul((int) $f[4], 121666, 17),
+ self::mul((int) $f[5], 121666, 17),
+ self::mul((int) $f[6], 121666, 17),
+ self::mul((int) $f[7], 121666, 17),
+ self::mul((int) $f[8], 121666, 17),
+ self::mul((int) $f[9], 121666, 17)
+ );
+
+ /** @var int $carry9 */
+ $carry9 = ($h[9] + (1 << 24)) >> 25;
+ $h[0] += self::mul($carry9, 19, 5);
+ $h[9] -= $carry9 << 25;
+ /** @var int $carry1 */
+ $carry1 = ($h[1] + (1 << 24)) >> 25;
+ $h[2] += $carry1;
+ $h[1] -= $carry1 << 25;
+ /** @var int $carry3 */
+ $carry3 = ($h[3] + (1 << 24)) >> 25;
+ $h[4] += $carry3;
+ $h[3] -= $carry3 << 25;
+ /** @var int $carry5 */
+ $carry5 = ($h[5] + (1 << 24)) >> 25;
+ $h[6] += $carry5;
+ $h[5] -= $carry5 << 25;
+ /** @var int $carry7 */
+ $carry7 = ($h[7] + (1 << 24)) >> 25;
+ $h[8] += $carry7;
+ $h[7] -= $carry7 << 25;
+
+ /** @var int $carry0 */
+ $carry0 = ($h[0] + (1 << 25)) >> 26;
+ $h[1] += $carry0;
+ $h[0] -= $carry0 << 26;
+ /** @var int $carry2 */
+ $carry2 = ($h[2] + (1 << 25)) >> 26;
+ $h[3] += $carry2;
+ $h[2] -= $carry2 << 26;
+ /** @var int $carry4 */
+ $carry4 = ($h[4] + (1 << 25)) >> 26;
+ $h[5] += $carry4;
+ $h[4] -= $carry4 << 26;
+ /** @var int $carry6 */
+ $carry6 = ($h[6] + (1 << 25)) >> 26;
+ $h[7] += $carry6;
+ $h[6] -= $carry6 << 26;
+ /** @var int $carry8 */
+ $carry8 = ($h[8] + (1 << 25)) >> 26;
+ $h[9] += $carry8;
+ $h[8] -= $carry8 << 26;
+
+ foreach ($h as $i => $value) {
+ $h[$i] = (int) $value;
+ }
+ return ParagonIE_Sodium_Core_Curve25519_Fe::fromArray($h);
+ }
+
+ /**
+ * @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;
+ $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, $z2);
+ # fe_tobytes(q,x2);
+ return self::fe_tobytes($x2);
+ }
+
+ /**
+ * @internal You should not use this directly from another application
+ *
+ * @param ParagonIE_Sodium_Core_Curve25519_Fe $edwardsY
+ * @param ParagonIE_Sodium_Core_Curve25519_Fe $edwardsZ
+ * @return ParagonIE_Sodium_Core_Curve25519_Fe
+ */
+ public static function edwards_to_montgomery(
+ ParagonIE_Sodium_Core_Curve25519_Fe $edwardsY,
+ ParagonIE_Sodium_Core_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 (
+ !($A->Y instanceof ParagonIE_Sodium_Core_Curve25519_Fe)
+ ||
+ !($A->Z instanceof ParagonIE_Sodium_Core_Curve25519_Fe)
+ ) {
+ throw new TypeError('Null points encountered');
+ }
+ $pk = self::edwards_to_montgomery($A->Y, $A->Z);
+ return self::fe_tobytes($pk);
+ }
+}