public static function ParagonIE_Sodium_Core_Curve25519::fe_sq2 in Automatic Updates 7
Same name and namespace in other branches
- 8 vendor/paragonie/sodium_compat/src/Core/Curve25519.php \ParagonIE_Sodium_Core_Curve25519::fe_sq2()
Square and double a field element
h = 2 * f * f
@internal You should not use this directly from another application
Parameters
ParagonIE_Sodium_Core_Curve25519_Fe $f:
Return value
ParagonIE_Sodium_Core_Curve25519_Fe
1 call to ParagonIE_Sodium_Core_Curve25519::fe_sq2()
- ParagonIE_Sodium_Core_Curve25519::ge_p2_dbl in vendor/
paragonie/ sodium_compat/ src/ Core/ Curve25519.php - @internal You should not use this directly from another application
File
- vendor/
paragonie/ sodium_compat/ src/ Core/ Curve25519.php, line 850
Class
- ParagonIE_Sodium_Core_Curve25519
- Class ParagonIE_Sodium_Core_Curve25519
Code
public static function fe_sq2(ParagonIE_Sodium_Core_Curve25519_Fe $f) {
$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];
/** @var int $f0_2 */
$f0_2 = $f0 << 1;
/** @var int $f1_2 */
$f1_2 = $f1 << 1;
/** @var int $f2_2 */
$f2_2 = $f2 << 1;
/** @var int $f3_2 */
$f3_2 = $f3 << 1;
/** @var int $f4_2 */
$f4_2 = $f4 << 1;
/** @var int $f5_2 */
$f5_2 = $f5 << 1;
/** @var int $f6_2 */
$f6_2 = $f6 << 1;
/** @var int $f7_2 */
$f7_2 = $f7 << 1;
$f5_38 = self::mul($f5, 38, 6);
/* 1.959375*2^30 */
$f6_19 = self::mul($f6, 19, 5);
/* 1.959375*2^30 */
$f7_38 = self::mul($f7, 38, 6);
/* 1.959375*2^30 */
$f8_19 = self::mul($f8, 19, 5);
/* 1.959375*2^30 */
$f9_38 = self::mul($f9, 38, 6);
/* 1.959375*2^30 */
$f0f0 = self::mul($f0, $f0, 24);
$f0f1_2 = self::mul($f0_2, $f1, 24);
$f0f2_2 = self::mul($f0_2, $f2, 24);
$f0f3_2 = self::mul($f0_2, $f3, 24);
$f0f4_2 = self::mul($f0_2, $f4, 24);
$f0f5_2 = self::mul($f0_2, $f5, 24);
$f0f6_2 = self::mul($f0_2, $f6, 24);
$f0f7_2 = self::mul($f0_2, $f7, 24);
$f0f8_2 = self::mul($f0_2, $f8, 24);
$f0f9_2 = self::mul($f0_2, $f9, 24);
$f1f1_2 = self::mul($f1_2, $f1, 24);
$f1f2_2 = self::mul($f1_2, $f2, 24);
$f1f3_4 = self::mul($f1_2, $f3_2, 24);
$f1f4_2 = self::mul($f1_2, $f4, 24);
$f1f5_4 = self::mul($f1_2, $f5_2, 24);
$f1f6_2 = self::mul($f1_2, $f6, 24);
$f1f7_4 = self::mul($f1_2, $f7_2, 24);
$f1f8_2 = self::mul($f1_2, $f8, 24);
$f1f9_76 = self::mul($f9_38, $f1_2, 24);
$f2f2 = self::mul($f2, $f2, 24);
$f2f3_2 = self::mul($f2_2, $f3, 24);
$f2f4_2 = self::mul($f2_2, $f4, 24);
$f2f5_2 = self::mul($f2_2, $f5, 24);
$f2f6_2 = self::mul($f2_2, $f6, 24);
$f2f7_2 = self::mul($f2_2, $f7, 24);
$f2f8_38 = self::mul($f8_19, $f2_2, 25);
$f2f9_38 = self::mul($f9_38, $f2, 24);
$f3f3_2 = self::mul($f3_2, $f3, 24);
$f3f4_2 = self::mul($f3_2, $f4, 24);
$f3f5_4 = self::mul($f3_2, $f5_2, 24);
$f3f6_2 = self::mul($f3_2, $f6, 24);
$f3f7_76 = self::mul($f7_38, $f3_2, 24);
$f3f8_38 = self::mul($f8_19, $f3_2, 24);
$f3f9_76 = self::mul($f9_38, $f3_2, 24);
$f4f4 = self::mul($f4, $f4, 24);
$f4f5_2 = self::mul($f4_2, $f5, 24);
$f4f6_38 = self::mul($f6_19, $f4_2, 25);
$f4f7_38 = self::mul($f7_38, $f4, 24);
$f4f8_38 = self::mul($f8_19, $f4_2, 25);
$f4f9_38 = self::mul($f9_38, $f4, 24);
$f5f5_38 = self::mul($f5_38, $f5, 24);
$f5f6_38 = self::mul($f6_19, $f5_2, 24);
$f5f7_76 = self::mul($f7_38, $f5_2, 24);
$f5f8_38 = self::mul($f8_19, $f5_2, 24);
$f5f9_76 = self::mul($f9_38, $f5_2, 24);
$f6f6_19 = self::mul($f6_19, $f6, 24);
$f6f7_38 = self::mul($f7_38, $f6, 24);
$f6f8_38 = self::mul($f8_19, $f6_2, 25);
$f6f9_38 = self::mul($f9_38, $f6, 24);
$f7f7_38 = self::mul($f7_38, $f7, 24);
$f7f8_38 = self::mul($f8_19, $f7_2, 24);
$f7f9_76 = self::mul($f9_38, $f7_2, 24);
$f8f8_19 = self::mul($f8_19, $f8, 24);
$f8f9_38 = self::mul($f9_38, $f8, 24);
$f9f9_38 = self::mul($f9_38, $f9, 24);
/** @var int $h0 */
$h0 = (int) ($f0f0 + $f1f9_76 + $f2f8_38 + $f3f7_76 + $f4f6_38 + $f5f5_38) << 1;
/** @var int $h1 */
$h1 = (int) ($f0f1_2 + $f2f9_38 + $f3f8_38 + $f4f7_38 + $f5f6_38) << 1;
/** @var int $h2 */
$h2 = (int) ($f0f2_2 + $f1f1_2 + $f3f9_76 + $f4f8_38 + $f5f7_76 + $f6f6_19) << 1;
/** @var int $h3 */
$h3 = (int) ($f0f3_2 + $f1f2_2 + $f4f9_38 + $f5f8_38 + $f6f7_38) << 1;
/** @var int $h4 */
$h4 = (int) ($f0f4_2 + $f1f3_4 + $f2f2 + $f5f9_76 + $f6f8_38 + $f7f7_38) << 1;
/** @var int $h5 */
$h5 = (int) ($f0f5_2 + $f1f4_2 + $f2f3_2 + $f6f9_38 + $f7f8_38) << 1;
/** @var int $h6 */
$h6 = (int) ($f0f6_2 + $f1f5_4 + $f2f4_2 + $f3f3_2 + $f7f9_76 + $f8f8_19) << 1;
/** @var int $h7 */
$h7 = (int) ($f0f7_2 + $f1f6_2 + $f2f5_2 + $f3f4_2 + $f8f9_38) << 1;
/** @var int $h8 */
$h8 = (int) ($f0f8_2 + $f1f7_4 + $f2f6_2 + $f3f5_4 + $f4f4 + $f9f9_38) << 1;
/** @var int $h9 */
$h9 = (int) ($f0f9_2 + $f1f8_2 + $f2f7_2 + $f3f6_2 + $f4f5_2) << 1;
/** @var int $carry0 */
$carry0 = $h0 + (1 << 25) >> 26;
$h1 += $carry0;
$h0 -= $carry0 << 26;
/** @var int $carry4 */
$carry4 = $h4 + (1 << 25) >> 26;
$h5 += $carry4;
$h4 -= $carry4 << 26;
/** @var int $carry1 */
$carry1 = $h1 + (1 << 24) >> 25;
$h2 += $carry1;
$h1 -= $carry1 << 25;
/** @var int $carry5 */
$carry5 = $h5 + (1 << 24) >> 25;
$h6 += $carry5;
$h5 -= $carry5 << 25;
/** @var int $carry2 */
$carry2 = $h2 + (1 << 25) >> 26;
$h3 += $carry2;
$h2 -= $carry2 << 26;
/** @var int $carry6 */
$carry6 = $h6 + (1 << 25) >> 26;
$h7 += $carry6;
$h6 -= $carry6 << 26;
/** @var int $carry3 */
$carry3 = $h3 + (1 << 24) >> 25;
$h4 += $carry3;
$h3 -= $carry3 << 25;
/** @var int $carry7 */
$carry7 = $h7 + (1 << 24) >> 25;
$h8 += $carry7;
$h7 -= $carry7 << 25;
/** @var int $carry4 */
$carry4 = $h4 + (1 << 25) >> 26;
$h5 += $carry4;
$h4 -= $carry4 << 26;
/** @var int $carry8 */
$carry8 = $h8 + (1 << 25) >> 26;
$h9 += $carry8;
$h8 -= $carry8 << 26;
/** @var int $carry9 */
$carry9 = $h9 + (1 << 24) >> 25;
$h0 += self::mul($carry9, 19, 5);
$h9 -= $carry9 << 25;
/** @var int $carry0 */
$carry0 = $h0 + (1 << 25) >> 26;
$h1 += $carry0;
$h0 -= $carry0 << 26;
return ParagonIE_Sodium_Core_Curve25519_Fe::fromArray(array(
(int) $h0,
(int) $h1,
(int) $h2,
(int) $h3,
(int) $h4,
(int) $h5,
(int) $h6,
(int) $h7,
(int) $h8,
(int) $h9,
));
}