Neos\Flow\Security\Cryptography\OpenSslRsaKey::getKeyString PHP Метод

    public function getKeyString()
    {
        return $this->keyString;
    }

 /**
  * Stores the given keypair and returns its fingerprint.
  *
  * The SSH fingerprint of the RSA public key will be used as an identifier for
  * consistent key access.
  *
  * @param OpenSslRsaKey $publicKey The public key
  * @param OpenSslRsaKey $privateKey The private key
  * @param boolean $usedForPasswords TRUE if this keypair should be used to encrypt passwords (then decryption won't be allowed!).
  * @return string The fingerprint which is used as an identifier for storing the key pair
  */
 private function storeKeyPair($publicKey, $privateKey, $usedForPasswords)
 {
     $publicKeyFingerprint = $this->getFingerprintByPublicKey($publicKey->getKeyString());
     $keyPair = [];
     $keyPair['publicKey'] = $publicKey;
     $keyPair['privateKey'] = $privateKey;
     $keyPair['usedForPasswords'] = $usedForPasswords;
     $this->keys[$publicKeyFingerprint] = $keyPair;
     $this->saveKeysOnShutdown = true;
     return $publicKeyFingerprint;
 }