public static SmsMessage createSmsMessage(Contact contact, String content)
throws FailedToCreateSmsMessageException {
// TODO: Set message direction
Calendar calendar;
long dateNumber;
DataManager dm;
String messageId;
String contactId;
int messageCount;
SmsMessage smsMessage;
try {
// Get sms message information from calendar and manager
calendar = new GregorianCalendar(TimeZone.getDefault());
// dateNumber = calendar.getTime().getTime();
dateNumber = calendar.getTimeInMillis();
// Create sms message into storage
dm = DataManager.getInstance();
// get key to encrypt messages
byte[] salt = Cryptography.decodeFromStorage(dm.getAttributeString(dm.USER, dm.SALT));
byte[] iv = Cryptography.decodeFromStorage(dm.getAttributeString(dm.USER, dm.IV));
SecretKey key = KeyManager.getInstance().generateStorageKey(salt);
// setup message id
contactId = contact.getId();
messageCount = dm.getAttributeInt(contactId, dm.MESSAGE_COUNT);
messageId = contactId + dm.MESSAGE_CLASS + String.format("%04d", messageCount);
messageCount++;
smsMessage = new SmsMessage(messageId, contact, dateNumber, content);
String encryptedContent = smsMessage.encryptToStore(key, iv);
// set attributes
dm.setAttribute(contactId, dm.MESSAGE_COUNT, messageCount);
dm.addAttribute(contactId, dm.MESSAGE_TABLE, messageId);
dm.setAttribute(messageId, dm.MESSAGE_DATE_NUMBER, dateNumber);
dm.setAttribute(messageId, dm.ENCRYPTED_CONTENT, encryptedContent);
return smsMessage;
} catch (FailedToLoadDataBaseException
| KeyStoreIsLockedException
| FailedToGenerateKeyException
| FailedToStoreException
| FailedToEncryptSmsMessageException
| FailedToGetAttributeException
| FailedToAddAttributeException exception) {
throw new FailedToCreateSmsMessageException(exception);
}
}
public static ArrayList<SmsMessage> retrieveAllSmsMessages(Contact contact)
throws FailedToRetrieveAllSmsMessagesException {
ArrayList<SmsMessage> messages;
Set<String> messageIds;
DataManager dm;
long dateNumber;
String contactId;
String encryptedContent, decryptedContent;
SmsMessage sms;
try {
messages = new ArrayList<>();
dm = DataManager.getInstance();
// get key to decrypt messages
byte[] salt = Cryptography.decodeFromStorage(dm.getAttributeString(dm.USER, dm.SALT));
byte[] iv = Cryptography.decodeFromStorage(dm.getAttributeString(dm.USER, dm.IV));
SecretKey key = KeyManager.getInstance().generateStorageKey(salt);
contactId = contact.getId();
messageIds = dm.getAttributeSet(contactId, dm.MESSAGE_TABLE);
// For each sms message id
for (String messageId : messageIds) {
// Get sms message information from storage
dateNumber = dm.getAttributeLong(messageId, dm.MESSAGE_DATE_NUMBER);
encryptedContent = dm.getAttributeString(messageId, dm.ENCRYPTED_CONTENT);
// decrypt
sms = new SmsMessage(contact, encryptedContent);
decryptedContent = sms.decryptFromStorage(key, iv);
sms = new SmsMessage(messageId, contact, dateNumber, decryptedContent);
messages.add(sms);
}
// Return array list of contacts
return messages;
} catch (FailedToDecryptSmsMessageException
| FailedToGenerateKeyException
| FailedToStoreException
| KeyStoreIsLockedException
| FailedToLoadDataBaseException
| FailedToGetAttributeException exception) {
throw new FailedToRetrieveAllSmsMessagesException(exception);
}
}