public static function ParagonIE_Sodium_Compat::crypto_stream in Automatic Updates 7

Same name and namespace in other branches

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

Expand a key and nonce into a keystream of pseudorandom bytes.

@psalm-suppress MixedArgument

Parameters

int $len Number of bytes desired:

string $nonce Number to be used Once; must be 24 bytes:

string $key XSalsa20 key:

Return value

string Pseudorandom stream that can be XORed with messages to provide encryption (but not authentication; see Poly1305 or crypto_auth() for that, which is not optional for security)

Throws

SodiumException

TypeError

2 calls to ParagonIE_Sodium_Compat::crypto_stream()

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

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

File

vendor/paragonie/sodium_compat/src/Compat.php, line 2967

Class

ParagonIE_Sodium_Compat

Code

public static function crypto_stream($len, $nonce, $key) {

  /* Type checks: */
  ParagonIE_Sodium_Core_Util::declareScalarType($len, 'int', 1);
  ParagonIE_Sodium_Core_Util::declareScalarType($nonce, 'string', 2);
  ParagonIE_Sodium_Core_Util::declareScalarType($key, 'string', 3);

  /* Input validation: */
  if (ParagonIE_Sodium_Core_Util::strlen($nonce) !== self::CRYPTO_STREAM_NONCEBYTES) {
    throw new SodiumException('Argument 2 must be CRYPTO_SECRETBOX_NONCEBYTES long.');
  }
  if (ParagonIE_Sodium_Core_Util::strlen($key) !== self::CRYPTO_STREAM_KEYBYTES) {
    throw new SodiumException('Argument 3 must be CRYPTO_STREAM_KEYBYTES long.');
  }
  if (self::useNewSodiumAPI()) {
    return sodium_crypto_stream($len, $nonce, $key);
  }
  if (self::use_fallback('crypto_stream')) {
    return (string) call_user_func('\\Sodium\\crypto_stream', $len, $nonce, $key);
  }
  if (PHP_INT_SIZE === 4) {
    return ParagonIE_Sodium_Core32_XSalsa20::xsalsa20($len, $nonce, $key);
  }
  return ParagonIE_Sodium_Core_XSalsa20::xsalsa20($len, $nonce, $key);
}