#!/usr/bin/env python3
# Copyright (c) 2015-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test multiple RPC users."""

import http.client
import os
import urllib.parse
import subprocess
from random import SystemRandom
import string
import configparser

from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
    assert_equal,
    get_datadir_path,
    str_to_b64str,
)


class HTTPBasicsTest(BitcoinTestFramework):
    def set_test_params(self):
        self.num_nodes = 2

    def setup_chain(self):
        super().setup_chain()
        # Append rpcauth to bitcoin.conf before initialization
        rpcauth = "rpcauth=rt:93648e835a54c573682c2eb19f882535$7681e9c5b74bdd85e78166031d2058e1069b3ed7ed967c93fc63abba06f31144"
        rpcauth2 = "rpcauth=rt2:f8607b1a88861fac29dfccf9b52ff9f$ff36a0c23c8c62b4846112e50fa888416e94c17bfd4c42f88fd8f55ec6a3137e"
        rpcuser = "rpcuser=rpcuser💻"
        rpcpassword = "rpcpassword=rpcpassword🔑"

        self.user = ''.join(SystemRandom().choice(
            string.ascii_letters + string.digits) for _ in range(10))
        config = configparser.ConfigParser()
        config.read_file(open(self.options.configfile, encoding='utf-8'))
        gen_rpcauth = config['environment']['RPCAUTH']
        p = subprocess.Popen([gen_rpcauth, self.user],
                             stdout=subprocess.PIPE, universal_newlines=True)
        lines = p.stdout.read().splitlines()
        rpcauth3 = lines[1]
        self.password = lines[3]

        with open(os.path.join(get_datadir_path(self.options.tmpdir, 0), "bitcoin.conf"), 'a', encoding='utf8') as f:
            f.write(rpcauth + "\n")
            f.write(rpcauth2 + "\n")
            f.write(rpcauth3 + "\n")
        with open(os.path.join(get_datadir_path(self.options.tmpdir, 1), "bitcoin.conf"), 'a', encoding='utf8') as f:
            f.write(rpcuser + "\n")
            f.write(rpcpassword + "\n")

    def run_test(self):

        #
        # Check correctness of the rpcauth config option #
        #
        url = urllib.parse.urlparse(self.nodes[0].url)

        # Old authpair
        authpair = url.username + ':' + url.password

        # New authpair generated via share/rpcauth tool
        password = "cA773lm788buwYe4g4WT+05pKyNruVKjQ25x3n0DQcM="

        # Second authpair with different username
        password2 = "8/F3uMDw4KSEbw96U3CA1C4X05dkHDN2BPFjTgZW4KI="
        authpairnew = "rt:" + password

        self.log.info('Correct...')
        headers = {"Authorization": "Basic " + str_to_b64str(authpair)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 200)
        conn.close()

        # Use new authpair to confirm both work
        self.log.info('Correct...')
        headers = {"Authorization": "Basic " + str_to_b64str(authpairnew)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 200)
        conn.close()

        # Wrong login name with rt's password
        self.log.info('Wrong...')
        authpairnew = "rtwrong:" + password
        headers = {"Authorization": "Basic " + str_to_b64str(authpairnew)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 401)
        conn.close()

        # Wrong password for rt
        self.log.info('Wrong...')
        authpairnew = "rt:" + password + "wrong"
        headers = {"Authorization": "Basic " + str_to_b64str(authpairnew)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 401)
        conn.close()

        # Correct for rt2
        self.log.info('Correct...')
        authpairnew = "rt2:" + password2
        headers = {"Authorization": "Basic " + str_to_b64str(authpairnew)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 200)
        conn.close()

        # Wrong password for rt2
        self.log.info('Wrong...')
        authpairnew = "rt2:" + password2 + "wrong"
        headers = {"Authorization": "Basic " + str_to_b64str(authpairnew)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 401)
        conn.close()

        # Correct for randomly generated user
        self.log.info('Correct...')
        authpairnew = self.user + ":" + self.password
        headers = {"Authorization": "Basic " + str_to_b64str(authpairnew)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 200)
        conn.close()

        # Wrong password for randomly generated user
        self.log.info('Wrong...')
        authpairnew = self.user + ":" + self.password + "Wrong"
        headers = {"Authorization": "Basic " + str_to_b64str(authpairnew)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 401)
        conn.close()

        ###############################################################
        # Check correctness of the rpcuser/rpcpassword config options #
        ###############################################################
        url = urllib.parse.urlparse(self.nodes[1].url)

        # rpcuser and rpcpassword authpair
        self.log.info('Correct...')
        rpcuserauthpair = "rpcuser💻:rpcpassword🔑"

        headers = {"Authorization": "Basic " + str_to_b64str(rpcuserauthpair)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 200)
        conn.close()

        # Wrong login name with rpcuser's password
        rpcuserauthpair = "rpcuserwrong:rpcpassword"
        headers = {"Authorization": "Basic " + str_to_b64str(rpcuserauthpair)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 401)
        conn.close()

        # Wrong password for rpcuser
        self.log.info('Wrong...')
        rpcuserauthpair = "rpcuser:rpcpasswordwrong"
        headers = {"Authorization": "Basic " + str_to_b64str(rpcuserauthpair)}

        conn = http.client.HTTPConnection(url.hostname, url.port)
        conn.connect()
        conn.request('POST', '/', '{"method": "getbestblockhash"}', headers)
        resp = conn.getresponse()
        assert_equal(resp.status, 401)
        conn.close()


if __name__ == '__main__':
    HTTPBasicsTest().main()
