/**
   * Builds an instruction object from the contents of an instruction file.
   *
   * @param instructionFile A non-null instruction file retrieved from S3 that contains encryption
   *     information
   * @param materialsProvider The non-null encryption materials provider to be used to encrypt and
   *     decrypt data.
   * @param cryptoProvider The crypto provider whose encryption implementation will be used to
   *     encrypt and decrypt data. Null is ok and uses the preferred provider from
   *     Security.getProviders().
   * @return A non-null instruction object containing encryption information
   * @deprecated no longer used and will be removed in the future
   */
  @Deprecated
  public static EncryptionInstruction buildInstructionFromInstructionFile(
      S3Object instructionFile,
      EncryptionMaterialsProvider materialsProvider,
      Provider cryptoProvider) {
    JSONObject instructionJSON = parseJSONInstruction(instructionFile);
    try {
      // Get fields from instruction object
      String encryptedSymmetricKeyB64 = instructionJSON.getString(Headers.CRYPTO_KEY);
      String ivB64 = instructionJSON.getString(Headers.CRYPTO_IV);
      String materialsDescriptionString =
          instructionJSON.tryGetString(Headers.MATERIALS_DESCRIPTION);
      Map<String, String> materialsDescription = convertJSONToMap(materialsDescriptionString);

      // Decode from Base 64 to standard binary bytes
      byte[] encryptedSymmetricKey = Base64.decode(encryptedSymmetricKeyB64);
      byte[] iv = Base64.decode(ivB64);

      if (encryptedSymmetricKey == null || iv == null) {
        // If necessary encryption info was not found in the instruction file, throw an exception.
        throw new AmazonClientException(
            String.format(
                "Necessary encryption info not found in the instruction file '%s' in bucket '%s'",
                instructionFile.getKey(), instructionFile.getBucketName()));
      }

      EncryptionMaterials materials =
          retrieveOriginalMaterials(materialsDescription, materialsProvider);
      // If we're unable to retrieve the original encryption materials, we can't decrypt the object,
      // so
      // throw an exception.
      if (materials == null) {
        throw new AmazonClientException(
            String.format(
                "Unable to retrieve the encryption materials that originally "
                    + "encrypted object corresponding to instruction file '%s' in bucket '%s'.",
                instructionFile.getKey(), instructionFile.getBucketName()));
      }

      // Decrypt the symmetric key and create the symmetric cipher
      SecretKey symmetricKey =
          getDecryptedSymmetricKey(encryptedSymmetricKey, materials, cryptoProvider);
      CipherFactory cipherFactory =
          new CipherFactory(symmetricKey, Cipher.DECRYPT_MODE, iv, cryptoProvider);

      return new EncryptionInstruction(
          materialsDescription, encryptedSymmetricKey, symmetricKey, cipherFactory);
    } catch (JSONException e) {
      throw new AmazonClientException(
          "Unable to parse retrieved instruction file : " + e.getMessage());
    }
  }
 /**
  * Converts the JSON encoded materials description to a Map<String, String>
  *
  * @deprecated no longer used and will be removed in the future
  */
 @Deprecated
 @SuppressWarnings("unchecked") // Suppresses Iterator<String> type warning
 private static Map<String, String> convertJSONToMap(String descriptionJSONString) {
   if (descriptionJSONString == null) {
     return null;
   }
   try {
     JSONObject descriptionJSON = new JSONObject(descriptionJSONString);
     Iterator<String> keysIterator = descriptionJSON.keys();
     Map<String, String> materialsDescription = new HashMap<String, String>();
     while (keysIterator.hasNext()) {
       String key = keysIterator.next();
       materialsDescription.put(key, descriptionJSON.getString(key));
     }
     return materialsDescription;
   } catch (JSONException e) {
     throw new AmazonClientException(
         "Unable to parse encryption materials description from metadata :" + e.getMessage());
   }
 }
예제 #3
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  private JSONObject getJsonFromString(String jsonStr) {

    JSONObject jo = null;
    boolean successJson = false;

    while (!successJson) {
      try {
        jo = new JSONObject(jsonStr);
        successJson = true;
      } catch (JSONException je) {
        String exceptionTypeToFix = "Duplicate key ";
        String duplicated;
        if (je.getMessage().contains(exceptionTypeToFix)) {
          System.out.println("WARNING : Duplicate in json ");
          duplicated = je.getMessage().replaceAll("\"", "").replace("Duplicate key ", "");
          System.out.println("WARNING : Transversing Duplicated json TAG : " + duplicated);
          while (jsonStr.contains(duplicated)) {
            jsonStr =
                jsonStr.replaceFirst(
                    duplicated, duplicated.toUpperCase() + System.currentTimeMillis());
          }
        } else {
          System.out.println("no json");
          return null;
        }
        continue;
      }
    }

    String[] names = JSONObject.getNames(jo);

    for (String string : names) {
      System.out.print(string + " = ");
      try {
        System.out.println(jo.get(string));
      } catch (JSONException e) {
        e.printStackTrace();
      }
    }
    return jo;
  }