public static function ParagonIE_Sodium_Compat::crypto_kx_seed_keypair in Automatic Updates 7

Same name and namespace in other branches

1. 8 vendor/paragonie/sodium_compat/src/Compat.php \ParagonIE_Sodium_Compat::crypto_kx_seed_keypair()

Parameters

string $seed:

Return value

string

Throws

SodiumException

1 call to ParagonIE_Sodium_Compat::crypto_kx_seed_keypair()

php72compat.php in vendor/paragonie/sodium_compat/lib/php72compat.php

File

vendor/paragonie/sodium_compat/src/Compat.php, line 1758

Class

ParagonIE_Sodium_Compat

Code

public static function crypto_kx_seed_keypair($seed) {
  ParagonIE_Sodium_Core_Util::declareScalarType($seed, 'string', 1);
  $seed = (string) $seed;
  if (ParagonIE_Sodium_Core_Util::strlen($seed) !== self::CRYPTO_KX_SEEDBYTES) {
    throw new SodiumException('seed must be SODIUM_CRYPTO_KX_SEEDBYTES bytes');
  }
  $sk = self::crypto_generichash($seed, '', self::CRYPTO_KX_SECRETKEYBYTES);
  $pk = self::crypto_scalarmult_base($sk);
  return $sk . $pk;
}