public static function ParagonIE_Sodium_Core32_Curve25519::fe_cmov in Automatic Updates 8

Same name and namespace in other branches

1. 7 vendor/paragonie/sodium_compat/src/Core32/Curve25519.php \ParagonIE_Sodium_Core32_Curve25519::fe_cmov()

Constant-time conditional move.

@internal You should not use this directly from another application

@psalm-suppress MixedAssignment @psalm-suppress MixedMethodCall

Parameters

ParagonIE_Sodium_Core32_Curve25519_Fe $f:

ParagonIE_Sodium_Core32_Curve25519_Fe $g:

int $b:

Return value

ParagonIE_Sodium_Core32_Curve25519_Fe

Throws

SodiumException

TypeError

1 call to ParagonIE_Sodium_Core32_Curve25519::fe_cmov()

ParagonIE_Sodium_Core32_Curve25519::cmov in vendor/paragonie/sodium_compat/src/Core32/Curve25519.php

Conditional move

File

vendor/paragonie/sodium_compat/src/Core32/Curve25519.php, line 111

Class

ParagonIE_Sodium_Core32_Curve25519

Class ParagonIE_Sodium_Core32_Curve25519

Code

public static function fe_cmov(ParagonIE_Sodium_Core32_Curve25519_Fe $f, ParagonIE_Sodium_Core32_Curve25519_Fe $g, $b = 0) {

  /** @var array<int, ParagonIE_Sodium_Core32_Int32> $h */
  $h = array();
  for ($i = 0; $i < 10; ++$i) {
    if (!$f[$i] instanceof ParagonIE_Sodium_Core32_Int32) {
      throw new TypeError('Expected Int32');
    }
    if (!$g[$i] instanceof ParagonIE_Sodium_Core32_Int32) {
      throw new TypeError('Expected Int32');
    }
    $h[$i] = $f[$i]
      ->xorInt32($f[$i]
      ->xorInt32($g[$i])
      ->mask($b));
  }

  /** @var array<int, ParagonIE_Sodium_Core32_Int32> $h */
  return ParagonIE_Sodium_Core32_Curve25519_Fe::fromArray($h);
}