263 lines
7.0 KiB
C++
263 lines
7.0 KiB
C++
#include "EMailSender.h"
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// BASE64 -----------------------------------------------------------
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const char PROGMEM b64_alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"0123456789+/";
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#define encode64(arr) encode64_f(arr,strlen(arr))
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inline void a3_to_a4(unsigned char * a4, unsigned char * a3) {
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a4[0] = (a3[0] & 0xfc) >> 2;
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a4[1] = ((a3[0] & 0x03) << 4) + ((a3[1] & 0xf0) >> 4);
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a4[2] = ((a3[1] & 0x0f) << 2) + ((a3[2] & 0xc0) >> 6);
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a4[3] = (a3[2] & 0x3f);
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}
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int base64_encode(char *output, char *input, int inputLen) {
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int i = 0, j = 0;
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int encLen = 0;
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unsigned char a3[3];
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unsigned char a4[4];
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while (inputLen--) {
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a3[i++] = *(input++);
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if (i == 3) {
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a3_to_a4(a4, a3);
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for (i = 0; i < 4; i++) {
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output[encLen++] = pgm_read_byte(&b64_alphabet[a4[i]]);
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}
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i = 0;
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}
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}
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if (i) {
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for (j = i; j < 3; j++) {
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a3[j] = '\0';
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}
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a3_to_a4(a4, a3);
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for (j = 0; j < i + 1; j++) {
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output[encLen++] = pgm_read_byte(&b64_alphabet[a4[j]]);
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}
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while ((i++ < 3)) {
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output[encLen++] = '=';
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}
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}
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output[encLen] = '\0';
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return encLen;
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}
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int base64_enc_length(int plainLen) {
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int n = plainLen;
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return (n + 2 - ((n + 2) % 3)) / 3 * 4;
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}
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const char* encode64_f(char* input, uint8_t len) {
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// encoding
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DEBUG_PRINTLN(F("Encoding"));
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DEBUG_PRINTLN(input);
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DEBUG_PRINTLN(len);
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//int encodedLen =
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base64_enc_length(len);
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static char encoded[256];
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// note input is consumed in this step: it will be empty afterwards
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base64_encode(encoded, input, len);
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return encoded;
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}
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// END BASE64 ---------------------------------------------------------
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EMailSender::EMailSender(const char* email_login, const char* email_password, const char* email_from, // @suppress("Class members should be properly initialized")
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const char* smtp_server, uint16_t smtp_port, bool isSecure) {
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this->setEMailLogin(email_login);
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this->setEMailFrom(email_from);
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this->setEMailPassword(email_password);
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this->setSMTPServer(smtp_server);
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this->setSMTPPort(smtp_port);
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this->isSecure = isSecure;
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}
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EMailSender::EMailSender(const char* email_login, const char* email_password, const char* email_from, bool isSecure) { // @suppress("Class members should be properly initialized")
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this->setEMailLogin(email_login);
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this->setEMailFrom(email_from);
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this->setEMailPassword(email_password);
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this->isSecure = isSecure;
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}
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EMailSender::EMailSender(const char* email_login, const char* email_password, bool isSecure){ // @suppress("Class members should be properly initialized")
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this->setEMailLogin(email_login);
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this->setEMailFrom(email_login);
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this->setEMailPassword(email_password);
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this->isSecure = isSecure;
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}
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void EMailSender::setSMTPPort(uint16_t smtp_port){
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this->smtp_port = smtp_port;
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};
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void EMailSender::setSMTPServer(const char* smtp_server){
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delete [] this->smtp_server;
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this->smtp_server = new char[strlen(smtp_server)+1];
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strcpy(this->smtp_server, smtp_server);
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};
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void EMailSender::setEMailLogin(const char* email_login){
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delete [] this->email_login;
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this->email_login = new char[strlen(email_login)+1];
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strcpy(this->email_login, email_login);
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};
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void EMailSender::setEMailFrom(const char* email_from){
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delete [] this->email_from;
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this->email_from = new char[strlen(email_from)+1];
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strcpy(this->email_from, email_from);
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};
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void EMailSender::setEMailPassword(const char* email_password){
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delete [] this->email_password;
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this->email_password = new char[strlen(email_password)+1];
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strcpy(this->email_password, email_password);
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};
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void EMailSender::setIsSecure(bool isSecure) {
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this->isSecure = isSecure;
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}
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EMailSender::Response EMailSender::awaitSMTPResponse(WiFiClientSecure &client,
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const char* resp, const char* respDesc, uint16_t timeOut) {
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EMailSender::Response response;
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uint32_t ts = millis();
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while (!client.available()) {
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if (millis() > (ts + timeOut)) {
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response.code = F("1");
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response.desc = F("SMTP Response TIMEOUT!");
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response.status = false;
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return response;
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}
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}
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_serverResponce = client.readStringUntil('\n');
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DEBUG_PRINTLN(_serverResponce);
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if (resp && _serverResponce.indexOf(resp) == -1){
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response.code = resp;
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response.desc = respDesc;
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response.status = false;
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return response;
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}
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response.status = true;
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return response;
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}
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EMailSender::Response EMailSender::send(const char* to, EMailMessage &email)
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{
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WiFiClientSecure client;
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DEBUG_PRINT(F("Insecure client:"));
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DEBUG_PRINTLN(this->isSecure);
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#ifndef ARDUINO_ESP8266_RELEASE_2_4_2
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if (this->isSecure == false){
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client.setInsecure();
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bool mfln = client.probeMaxFragmentLength(this->smtp_server, this->smtp_port, 512);
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DEBUG_PRINT("MFLN supported: ");
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DEBUG_PRINTLN(mfln?"yes":"no");
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if (mfln) {
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client.setBufferSizes(512, 512);
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}
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}
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#endif
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EMailSender::Response response;
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if(!client.connect(this->smtp_server, this->smtp_port)) {
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response.desc = F("Could not connect to mail server");
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response.code = F("2");
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response.status = false;
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return response;
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}
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response = awaitSMTPResponse(client, "220", "Connection Error");
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if (!response.status) return response;
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DEBUG_PRINTLN(F("HELO friend:"));
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client.println(F("HELO friend"));
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response = awaitSMTPResponse(client, "250", "Identification error");
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if (!response.status) return response;
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DEBUG_PRINTLN(F("AUTH LOGIN:"));
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client.println(F("AUTH LOGIN"));
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awaitSMTPResponse(client);
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DEBUG_PRINTLN(encode64(this->email_login));
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client.println(encode64(this->email_login));
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awaitSMTPResponse(client);
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DEBUG_PRINTLN(encode64(this->email_password));
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client.println(encode64(this->email_password));
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response = awaitSMTPResponse(client, "235", "SMTP AUTH error");
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if (!response.status) return response;
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String mailFrom = "MAIL FROM: <" + String(this->email_from) + '>';
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DEBUG_PRINTLN(mailFrom);
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client.println(mailFrom);
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awaitSMTPResponse(client);
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String rcpt = "RCPT TO: <" + String(to) + '>';
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DEBUG_PRINTLN(rcpt);
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client.println(rcpt);
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awaitSMTPResponse(client);
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DEBUG_PRINTLN(F("DATA:"));
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client.println(F("DATA"));
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response = awaitSMTPResponse(client, "354", "SMTP DATA error");
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if (!response.status) return response;
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client.println("From: <" + String(this->email_from) + '>');
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client.println("To: <" + String(to) + '>');
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client.print(F("Subject: "));
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client.println(email.subject);
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client.println(F("Mime-Version: 1.0"));
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client.println(F("Content-Type: text/html; charset=\"UTF-8\""));
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client.println(F("Content-Transfer-Encoding: 7bit"));
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client.println();
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String body = "<!DOCTYPE html><html lang=\"en\">" + String(email.message) + "</html>";
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client.println(body);
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client.println(".");
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response = awaitSMTPResponse(client, "250", "Sending message error");
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if (!response.status) return response;
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client.println(F("QUIT"));
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response = awaitSMTPResponse(client, "221", "SMTP QUIT error");
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if (!response.status) return response;
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response.status = true;
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response.code = F("0");
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response.desc = F("Message sent!");
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return response;
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}
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