import base64, random, smtplib, time, re, getpass, os, string


def check_isemail():
    global credentials
    if ".com" in credentials[0]:
        print("\n")
    else:
        print("Invalid email.")
        ask_login()


def verify_user():
    global accepted_user
    global accepted_pass
    accepted_user = b"bWludGVk"
    accepted_pass = b"bWVudGhvbGFkbWlu"
    decoded_user = base64.b64decode(accepted_user.decode('utf-8'))
    decoded_pass = base64.b64decode(accepted_pass.decode('utf-8'))
    username = input("U: ")
    if username == decoded_user.decode('utf-8'):
        password = input("P: ")
        if password == decoded_pass.decode('utf-8'):
            print("\nLogin verified.\n")
    else:
        print("Wrong credentials, did you forget your credentials?")
        forgot = input("")
        if forgot == "yes":
            forgot_password()
        else:
            verify_user()


def forgot_password():
    global accepted_user
    global accepted_pass
    numbers = "123456789(_+!&^%£"
    alphabet = "ABCEDFGHIJKLMNOPQRSTUVWXYZ"
    characters = alphabet + string.ascii_lowercase + numbers + string.ascii_uppercase
    rstring = "".join(random.choice(characters) for x in range(random.randint(9, 13)))
    filename = (str(rstring) + ".key")
    file = open(str(filename), "w+")
    file.write("User: " + accepted_user.decode('utf-8') + "\nPassword:" + accepted_pass.decode('utf-8') + "\n\nKey: Base64" +  "\nDecode using: https://www.base64decode.org/")


def show_info():
    version = 2.0
    print("mSpammer - by Nathan Townsend")
    print("The tool is currently running version:", str(version))


def load_variables():
    global smtp_server
    global port
    global d1
    global d2

    smtp_server = 'smtp.gmail.com'
    port = 587
    d1 = 0.25
    d2 = 0.60


def ask_login():
    global credentials
    print("\nFormat: 'americanjesus1929:slayer1'")
    ask_user = input("Enter credentials: ")
    credentials = ask_user.split(":")
    check_isemail()


def hash_password():
    global credentials
    global hashed_pass
    hashed_pass = base64.b64encode(credentials[1].encode('utf-8'))
    hashed_pass = hashed_pass.decode('utf-8')


def dehash_password():
    global hashed_pass
    global dehashed_pass
    dehashed_pass = base64.b64decode(hashed_pass)
    dehashed_pass = dehashed_pass.decode('utf-8')


def send_email():

    # Retrieve SMTP details
    global smtp_server
    global port

    # Retrieve delays to bypass limit
    global d1
    global d2

    # Retrieve user data
    global credentials
    global dehashed_pass

    # Ask user for email data
    receiver = input('Receiver of spam: ')
    subject = input('Subject of email: ')
    body = input('Email body: ')
    amount = input("Amount to send: ")

    try:
        # Attempt connection to SMTP server + port
        server = smtplib.SMTP(smtp_server, port)
        server.ehlo()

        # Start connection and login to server
        server.starttls()
        server.login(credentials[0], dehashed_pass)

        print('Sending ' + str(amount) + ' emails to ' + receiver)

        for i in range(1, int(amount) + 1):
            message = 'From: ' + credentials[0] + '\nSubject: ' + subject + '\n' + body
            time.sleep(random.uniform(d1, d2))
            server.sendmail(credentials[0], receiver, message)
            print("[ID: " + str(i) + "]" + "\tEmail sent. ")

        else:
            print("\nFinished sending emails.")

    except smtplib.SMTPRecipientsRefused:
        print("Recipient refused. Invalid email address?")
        main()

    except smtplib.SMTPAuthenticationError:
        print("Unable to authenticate with server. Ensure the details are correct.")
        main()

    except smtplib.SMTPServerDisconnected:
        print("Server disconnected for an unknown reason.")
        main()

    except smtplib.SMTPConnectError:
        print("Unable to connect to server.")
        main()


def main():
    verify_user()
    show_info()
    ask_login()
    hash_password()
    dehash_password()
    load_variables()
    send_email()