void SMTPClientSession::loginUsingCRAM(const std::string& username, const std::string& method, Poco::DigestEngine& hmac)
{
std::string response;
int status = sendCommand(std::string("AUTH ") + method, response);
if (!isPositiveIntermediate(status)) throw SMTPException(std::string("Cannot authenticate using ") + method, response, status);
std::string challengeBase64 = response.substr(4);
std::istringstream istr(challengeBase64);
Base64Decoder decoder(istr);
std::string challenge;
StreamCopier::copyToString(decoder, challenge);
hmac.update(challenge);
const DigestEngine::Digest& digest = hmac.digest();
std::string digestString(DigestEngine::digestToHex(digest));
std::string challengeResponse = username + " " + digestString;
std::ostringstream challengeResponseBase64;
Base64Encoder encoder(challengeResponseBase64);
encoder.rdbuf()->setLineLength(0);
encoder << challengeResponse;
encoder.close();
status = sendCommand(challengeResponseBase64.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException(std::string("Login using ") + method + " failed", response, status);
}
void SMTPClientSession::sendAddresses(const std::string& from, const Recipients& recipients)
{
std::string response;
int status = 0;
std::string::size_type emailPos = from.find('<');
if (emailPos == std::string::npos)
{
std::string sender("<");
sender.append(from);
sender.append(">");
status = sendCommand("MAIL FROM:", sender, response);
}
else
{
status = sendCommand("MAIL FROM:", from.substr(emailPos, from.size() - emailPos), response);
}
if (!isPositiveCompletion(status)) throw SMTPException("Cannot send message", response, status);
std::ostringstream recipient;
for (Recipients::const_iterator it = recipients.begin(); it != recipients.end(); ++it)
{
recipient << '<' << *it << '>';
int status = sendCommand("RCPT TO:", recipient.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException(std::string("Recipient rejected: ") + recipient.str(), response, status);
recipient.str("");
}
}
void SMTPClientSession::loginUsingLogin(const std::string& username, const std::string& password)
{
std::string response;
int status = sendCommand("AUTH LOGIN", response);
if (!isPositiveIntermediate(status)) throw SMTPException("Cannot authenticate using LOGIN", response, status);
std::ostringstream usernameBase64;
Base64Encoder usernameEncoder(usernameBase64);
usernameEncoder.rdbuf()->setLineLength(0);
usernameEncoder << username;
usernameEncoder.close();
std::ostringstream passwordBase64;
Base64Encoder passwordEncoder(passwordBase64);
passwordEncoder.rdbuf()->setLineLength(0);
passwordEncoder << password;
passwordEncoder.close();
//Server request for username/password not defined could be either
//S: login:
//C: user_login
//S: password:
//C: user_password
//or
//S: password:
//C: user_password
//S: login:
//C: user_login
std::string decodedResponse;
std::istringstream responseStream(response.substr(4));
Base64Decoder responseDecoder(responseStream);
StreamCopier::copyToString(responseDecoder, decodedResponse);
if (Poco::icompare(decodedResponse, 0, 8, "username") == 0) // username first (md5("Username:"******"Login using LOGIN username failed", response, status);
status = sendCommand(passwordBase64.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException("Login using LOGIN password failed", response, status);
}
else if (Poco::icompare(decodedResponse, 0, 8, "password") == 0) // password first (md5("Password:"******"Login using LOGIN password failed", response, status);
status = sendCommand(usernameBase64.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException("Login using LOGIN username failed", response, status);
}
}
void SMTPClientSession::login(const std::string& hostname, std::string& response)
{
open();
int status = sendCommand("EHLO", hostname, response);
if (isPermanentNegative(status))
status = sendCommand("HELO", hostname, response);
if (!isPositiveCompletion(status)) throw SMTPException("Login failed", response, status);
}
void SMTPClientSession::sendCommands(const MailMessage& message, const Recipients* pRecipients)
{
std::string response;
int status = 0;
const std::string& fromField = message.getSender();
std::string::size_type emailPos = fromField.find('<');
if (emailPos == std::string::npos)
{
std::string sender("<");
sender.append(fromField);
sender.append(">");
status = sendCommand("MAIL FROM:", sender, response);
}
else
{
status = sendCommand("MAIL FROM:", fromField.substr(emailPos, fromField.size() - emailPos), response);
}
if (!isPositiveCompletion(status)) throw SMTPException("Cannot send message", response, status);
std::ostringstream recipient;
if (pRecipients)
{
for (Recipients::const_iterator it = pRecipients->begin(); it != pRecipients->end(); ++it)
{
recipient << '<' << *it << '>';
int status = sendCommand("RCPT TO:", recipient.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException(std::string("Recipient rejected: ") + recipient.str(), response, status);
recipient.str("");
}
}
else
{
for (MailMessage::Recipients::const_iterator it = message.recipients().begin(); it != message.recipients().end(); ++it)
{
recipient << '<' << it->getAddress() << '>';
int status = sendCommand("RCPT TO:", recipient.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException(std::string("Recipient rejected: ") + recipient.str(), response, status);
recipient.str("");
}
}
status = sendCommand("DATA", response);
if (!isPositiveIntermediate(status)) throw SMTPException("Cannot send message data", response, status);
}
void SMTPClientSession::open()
{
if (!_isOpen)
{
std::string response;
int status = _socket.receiveStatusMessage(response);
if (!isPositiveCompletion(status)) throw SMTPException("The mail service is unavailable", response, status);
_isOpen = true;
}
}
void POP3ClientSession::login(const std::string& username, const std::string& password)
{
std::string response;
_socket.receiveMessage(response);
if (!isPositive(response)) throw SMTPException("The POP3 service is unavailable", response);
sendCommand("USER", username, response);
if (!isPositive(response)) throw POP3Exception("Login rejected for user", response);
sendCommand("PASS", password, response);
if (!isPositive(response)) throw POP3Exception("Password rejected for user", response);
}
void SMTPClientSession::transportMessage(const MailMessage& message)
{
SocketOutputStream socketStream(_socket);
MailOutputStream mailStream(socketStream);
message.write(mailStream);
mailStream.close();
socketStream.flush();
std::string response;
int status = _socket.receiveStatusMessage(response);
if (!isPositiveCompletion(status)) throw SMTPException("The server rejected the message", response, status);
}
void SMTPClientSession::loginUsingXOAUTH2(const std::string& username, const std::string& password)
{
std::ostringstream credentialsBase64;
Base64Encoder credentialsEncoder(credentialsBase64);
credentialsEncoder.rdbuf()->setLineLength(0);
credentialsEncoder << "user="******"\001auth=Bearer " << password << "\001\001";
credentialsEncoder.close();
std::string response;
int status = sendCommand("AUTH XOAUTH2", credentialsBase64.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException("Login using XOAUTH2 failed", response, status);
}
void SMTPClientSession::loginUsingPlain(const std::string& username, const std::string& password)
{
std::ostringstream credentialsBase64;
Base64Encoder credentialsEncoder(credentialsBase64);
credentialsEncoder.rdbuf()->setLineLength(0);
credentialsEncoder << '\0' << username << '\0' << password;
credentialsEncoder.close();
std::string response;
int status = sendCommand("AUTH PLAIN", credentialsBase64.str(), response);
if (!isPositiveCompletion(status)) throw SMTPException("Login using PLAIN failed", response, status);
}
void SMTPClientSession::sendMessage(std::istream& istr)
{
std::string response;
int status = 0;
SocketOutputStream socketStream(_socket);
MailOutputStream mailStream(socketStream);
StreamCopier::copyStream(istr, mailStream);
mailStream.close();
socketStream.flush();
status = _socket.receiveStatusMessage(response);
if (!isPositiveCompletion(status)) throw SMTPException("The server rejected the message", response, status);
}
void SMTPClientSession::login(const std::string& hostname, LoginMethod loginMethod, const std::string& username, const std::string& password)
{
std::string response;
login(hostname, response);
if (loginMethod == AUTH_CRAM_MD5)
{
if (response.find("CRAM-MD5", 0) != std::string::npos)
{
loginUsingCRAMMD5(username, password);
}
else throw SMTPException("The mail service does not support CRAM-MD5 authentication", response);
}
else if (loginMethod == AUTH_CRAM_SHA1)
{
if (response.find("CRAM-SHA1", 0) != std::string::npos)
{
loginUsingCRAMSHA1(username, password);
}
else throw SMTPException("The mail service does not support CRAM-SHA1 authentication", response);
}
else if (loginMethod == AUTH_LOGIN)
{
if (response.find("LOGIN", 0) != std::string::npos)
{
loginUsingLogin(username, password);
}
else throw SMTPException("The mail service does not support LOGIN authentication", response);
}
else if (loginMethod == AUTH_PLAIN)
{
if (response.find("PLAIN", 0) != std::string::npos)
{
loginUsingPlain(username, password);
}
else throw SMTPException("The mail service does not support PLAIN authentication", response);
}
else if (loginMethod == AUTH_XOAUTH2)
{
if (response.find("XOAUTH2", 0) != std::string::npos)
{
loginUsingXOAUTH2(username, password);
}
else throw SMTPException("The mail service does not support XOAUTH2 authentication", response);
}
else if (loginMethod != AUTH_NONE)
{
throw SMTPException("The autentication method is not supported");
}
}
void SMTPClientSession::sendData()
{
std::string response;
int status = sendCommand("DATA", response);
if (!isPositiveIntermediate(status)) throw SMTPException("Cannot send message data", response, status);
}