<?php
    
      use ParagonIE\CipherSweet\Backend\FIPSCrypto;
      use ParagonIE\CipherSweet\KeyProvider\StringProvider;
      use ParagonIE\CipherSweet\CipherSweet;
      use ParagonIE\CipherSweet\BlindIndex;
      use ParagonIE\CipherSweet\EncryptedField;
      use ParagonIE\CipherSweet\EncryptedRow;
    
      /*************************************************************************************************************************
       * GETTING ACCESS TO ENCRYPTED TABLE DATA ROW & ENCRYPT DATA -> encrypted data will be stored via separate SQL-Select
       * EncryptedRow -> for simple encryption of multiple table fields with Blind Indexing, but without Authentication
       * Encryption method -> FIPS 140-2 algorithms
       * KeyProvider -> StringProvider
       * @param $sKey  //You can pass a raw binary string, hex-encoded string, or base64url-encoded string to the StringProvider constructor, provided the decoded key is 256 bits
       * @param $table  //Table identifier
       * @param $fieldName01  //Field identifier -> will hold ciphertext
       * @param $fieldName02  //Field identifier -> will hold ciphertext
       * @param $fieldName03  //Field identifier -> will hold ciphertext
       * @param $fieldName04  //Field identifier -> will hold ciphertext
       * @param $fieldName05  //Field identifier -> will hold ciphertext
       * @param $fieldName01_bidx  //Field identifier -> will hold the blind index cipher
       * @param $fieldName01Value  //Field value -> that will be encrypted into $ciphertext
       * @param $fieldName02Value  //Field value -> that will be encrypted into $ciphertext
       * @param $fieldName03Value  //Field value -> that will be encrypted into $ciphertext
       * @param $fieldName04Value  //Field value -> that will be encrypted into $ciphertext
       * @param $fieldName05Value  //Field value -> that will be encrypted into $ciphertext
       * @param $prepared  //Holds the encrypted field value & blind index
       * @return int
       */
      function encryptDataTableRow($sKey, $table, $fieldName01, $fieldName02, $fieldName03, $fieldName04, $fieldName05, $fieldName01_bidx, $fieldName01Value, $fieldName02Value, $fieldName03Value, $fieldName04Value, $fieldName05Value, &$prepared): int
      {
        try {
          // Use only FIPS 140-2 algorithms
          $fips = new FIPSCrypto();
    
          // Define Key Provider
          $provider = new StringProvider(
          // Example key, chosen randomly, hex-encoded:
            $sKey
          );
    
          // Start Engine
          $engine = new CipherSweet($provider, $fips);
    
          // Define fields which will be encrypted
          $row = (new EncryptedRow($engine, $table))
            ->addTextField($fieldName01)
            ->addTextField($fieldName02)
            ->addTextField($fieldName03)
            ->addTextField($fieldName04)
            ->addTextField($fieldName05);
    
    
          // Add a normal Blind Index on one field:
          $row->addBlindIndex(
            $fieldName01,
            new BlindIndex(
              $fieldName01_bidx,
              [],
              32
            )
          );
    
          // Set Cipher
    
          $prepared = $row->prepareRowForStorage([
            $fieldName01=>$fieldName01Value,
            $fieldName02=>$fieldName02Value,
            $fieldName03=>$fieldName03Value,
            $fieldName04=>$fieldName04Value,
            $fieldName05=>$fieldName05Value
          ]);
    
          return 0;  //function processed without errors
    
        } catch (Exception $ex) {
          echo "Error: " . $ex->getMessage();
    
          return -1;  //function processed with errors
        }
      }
    
    
    
    
    
      /************************************************************************************************************************
       * GETTING ACCESS TO ENCRYPTED TABLE DATA ROW -> decryption will be processed after fetching via separate SQL-Select
       * EncryptedRow -> for simple encryption of multiple table fields with Blind Indexing, but without Authentication
       * Encryption method -> FIPS 140-2 algorithms
       * KeyProvider -> StringProvider
       * @param $sKey  //You can pass a raw binary string, hex-encoded string, or base64url-encoded string to the StringProvider constructor, provided the decoded key is 256 bits
       * @param $table  //Table identifier
       * @param $fieldName01  //Field identifier -> will hold ciphertext
       * @param $fieldName02  //Field identifier -> will hold ciphertext
       * @param $fieldName03  //Field identifier -> will hold ciphertext
       * @param $fieldName04  //Field identifier -> will hold ciphertext
       * @param $fieldName05  //Field identifier -> will hold ciphertext
       * @param $fieldName01_bidx  //Field identifier -> will hold the blind index cipher
       * @param $fieldName01Value  //Field value -> that will be encrypted into $ciphertext
       * @param $row  //Holds access to decryption model
       * @param $indexes  //Holds the encrypted blind index for sql statement
       * @return int
       */
      function getEncryptDataTableRow($sKey, $table, $fieldName01, $fieldName02, $fieldName03, $fieldName04, $fieldName05, $fieldName01_bidx, $fieldName01Value, &$row, &$indexes): int
      {
        try {
          // Use only FIPS 140-2 algorithms
          $fips = new FIPSCrypto();
    
          // Define Key Provider
          $provider = new StringProvider(
          // Example key, chosen randomly, hex-encoded:
            $sKey
          );
    
          // Start Engine
          $engine = new CipherSweet($provider, $fips);
    
          // Define fields which will be decrypted
          $row = (new EncryptedRow($engine, $table))
            ->addTextField($fieldName01)
            ->addTextField($fieldName02)
            ->addTextField($fieldName03)
            ->addTextField($fieldName04)
            ->addTextField($fieldName05);
    
    
          // Add a normal Blind Index on one field:
          $row->addBlindIndex(
            $fieldName01,
            new BlindIndex(
              $fieldName01_bidx,
              [],
              32
            )
          );
    
    
          // Use these values in search queries:
          $indexes = $row->getAllBlindIndexes([$fieldName01 => $fieldName01Value]);
    
          return 0;  //function processed without errors
    
        } catch (Exception $ex) {
          echo "Error: " . $ex->getMessage();
    
          return -1;  //function processed with errors
        }
      }


  // EncryptedRow without Authentication -> encrypt & store
  function testEncryptDataTableRow() {
       
    $sKey = '4e1c44f87b4cdf21808762970b356891db180a9dd9850e7baf2a79ff3ab8a2fc';
    $table = 'test_multi_field_encryption';
    $fieldName01 = 'customer_name';
    $fieldName02 = 'customer_street';
    $fieldName03 = 'customer_post_code';
    $fieldName04 = 'customer_city';
    $fieldName05 = 'customer_country';
    $fieldName01_bidx = 'customer_bidx';
    $fieldName01Value = 'XXXX AG';
    $fieldName02Value = 'Maylacher 7';
    $fieldName03Value = '70131';
    $fieldName04Value = 'Karlsruhe';
    $fieldName05Value = 'Deutschland';

    $customer_id = 1003;


    $ret = encryptDataTableRow($sKey, $table, $fieldName01, $fieldName02, $fieldName03, $fieldName04, $fieldName05, $fieldName01_bidx, $fieldName01Value, $fieldName02Value,  $fieldName03Value, $fieldName04Value, $fieldName05Value, $prepared);

    try {

      $blindindex = $prepared[1][customer_bidx][value];
      $value01 = $prepared[0][customer_name];
      $value02 = $prepared[0][customer_street];
      $value03 = $prepared[0][customer_post_code];
      $value04 = $prepared[0][customer_city];
      $value05 = $prepared[0][customer_country];


      $db = new MySQLi(...);
      $sql = "INSERT INTO `test_multi_field_encryption`(`customer_id`, `customer_name`, `customer_street`, `customer_post_code`, `customer_city`, `customer_country`, `customer_bidx`) VALUES ('" . $customer_id . "','" . $value01 . "','" . $value02 . "','" . $value03 . "','" . $value04 . "','" . $value05 . "','" . $blindindex . "')";

      $result = $db->query($sql);

      $db->close();
    } catch (Exception $ex) {
      echo "Fehler: " . $ex->getMessage();
      $db->close();
      $ret = -2;  // no db connection
    }
  }


  // EncryptedRow without Authentication -> select & decrypt
  function testDecryptDataTableRow() {

    $sKey = '4e1c44f87b4cdf21808762970b356891db180a9dd9850e7baf2a79ff3ab8a2fc';
    $table = 'test_multi_field_encryption';
    $fieldName01 = 'customer_name';
    $fieldName02 = 'customer_street';
    $fieldName03 = 'customer_post_code';
    $fieldName04 = 'customer_city';
    $fieldName05 = 'customer_country';
    $fieldName01_bidx = 'customer_bidx';
    $fieldName01Value = 'XXXX AG';


    $ret = getEncryptDataTableRow($sKey, $table, $fieldName01, $fieldName02, $fieldName03, $fieldName04, $fieldName05, $fieldName01_bidx, $fieldName01Value, $rowP, $indexes);

    try {
      $blindindex = $indexes[customer_bidx][value];


      $db = new MySQLi(...);
      $sql = "SELECT * FROM `test_multi_field_encryption` WHERE customer_bidx = '" . $blindindex . "'";


      $result = $db->query($sql);
      $row = $result->fetch_row();


      $encyptedRow = $rowP->decryptRow($row);


      $db->close();
    } catch (Exception $ex) {
      echo "Fehler: " . $ex->getMessage();
      $db->close();
    }
  }
?>

我的问题是代码行“$encyptedRow = $rowP->decryptRow($row);”。

我将收到类似这样的错误消息：
'Uncaught TypeError：传递给 ParagonIE\ConstantTime\Binary::safeSubstr() 的参数 1 必须是字符串类型，给定为 null，在 C:\Users...\vendor\paragonie\ciphersweet\src\Backend\FIPSCrypto.php 的第 95 行调用，并在 C:\Users...\vendor\paragonie\constant_time_encoding\src\Binary.php:67 中定义 堆栈跟踪： #0 C:\Users...\vendor\paragonie\ciphersweet\src\Backend\FIPSCrypto.php(95): ParagonIE\ConstantTime\Binary::safeSubstr(NULL, 0, 5) #1 C:\Users...\vendor\paragonie\ciphersweet\src\EncryptedRow.php(334): ParagonIE\CipherSweet\Backend\FIPSCrypto->decrypt(NULL, Object(ParagonIE\CipherSweet\Backend\Key\SymmetricKey)) #2 C:\Users...\partials\cipherTEST.php(94): ParagonIE\CipherSweet\EncryptedRow->decryptRow(Array) #3 C:\Users...'

也许有人可以帮我。

提前谢谢。