public static function ParagonIE_Sodium_Compat::crypto_box_seal in Automatic Updates 7

Same name and namespace in other branches

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

Anonymous public-key encryption. Only the recipient may decrypt messages.

Algorithm: X25519-XSalsa20-Poly1305, as with crypto_box. The sender's X25519 keypair is ephemeral. Nonce is generated from the BLAKE2b hash of both public keys.

This provides ciphertext integrity.

@psalm-suppress MixedArgument

Parameters

string $plaintext Message to be sealed:

string $publicKey Your recipient's public key:

Return value

string Sealed message that only your recipient can decrypt

Throws

SodiumException

TypeError

2 calls to ParagonIE_Sodium_Compat::crypto_box_seal()

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 1089

Class

ParagonIE_Sodium_Compat

Code

public static function crypto_box_seal($plaintext, $publicKey) {

  /* Type checks: */
  ParagonIE_Sodium_Core_Util::declareScalarType($plaintext, 'string', 1);
  ParagonIE_Sodium_Core_Util::declareScalarType($publicKey, 'string', 2);

  /* Input validation: */
  if (ParagonIE_Sodium_Core_Util::strlen($publicKey) !== self::CRYPTO_BOX_PUBLICKEYBYTES) {
    throw new SodiumException('Argument 2 must be CRYPTO_BOX_PUBLICKEYBYTES long.');
  }
  if (self::useNewSodiumAPI()) {
    return (string) sodium_crypto_box_seal($plaintext, $publicKey);
  }
  if (self::use_fallback('crypto_box_seal')) {
    return (string) call_user_func('\\Sodium\\crypto_box_seal', $plaintext, $publicKey);
  }
  if (PHP_INT_SIZE === 4) {
    return ParagonIE_Sodium_Crypto32::box_seal($plaintext, $publicKey);
  }
  return ParagonIE_Sodium_Crypto::box_seal($plaintext, $publicKey);
}