@Override
public boolean login() throws IOException {
final String name = getLocalAddress().getHostName();
if (name == null) {
return false;
}
boolean ok = SMTPReply.isPositiveCompletion(sendCommand("EHLO", name));
authTypes = "";
for (String line : getReplyStrings()) {
if (line != null && (line.startsWith("250 AUTH ") || line.startsWith("250-AUTH "))) {
authTypes = line;
break;
}
}
return ok;
}
private boolean authCram(String smtpUser, String smtpPass, String alg)
throws UnsupportedEncodingException, IOException {
final String macName = "Hmac" + alg;
if (sendCommand("AUTH", "CRAM-" + alg) != 334) {
return false;
}
final String enc = getReplyStrings()[0].split(" ", 2)[1];
final byte[] nonce = Base64.decodeBase64(enc.getBytes(UTF_8));
final String sec;
try {
Mac mac = Mac.getInstance(macName);
mac.init(new SecretKeySpec(smtpPass.getBytes(UTF_8), macName));
sec = toHex(mac.doFinal(nonce));
} catch (NoSuchAlgorithmException e) {
throw new IOException("Cannot use CRAM-" + alg, e);
} catch (InvalidKeyException e) {
throw new IOException("Cannot use CRAM-" + alg, e);
}
String token = smtpUser + ' ' + sec;
String cmd = encodeBase64(token.getBytes(UTF_8));
return SMTPReply.isPositiveCompletion(sendCommand(cmd));
}
private boolean authPlain(String smtpUser, String smtpPass)
throws UnsupportedEncodingException, IOException {
String token = '\0' + smtpUser + '\0' + smtpPass;
String cmd = "PLAIN " + encodeBase64(token.getBytes(UTF_8));
return SMTPReply.isPositiveCompletion(sendCommand("AUTH", cmd));
}