ESP8266 - encryption with LUA, Python 3 and PHP 7.1

encrypt.lua

-- Nodemcu 2.2.0.0 - LUA version 5.1.4

method = 'AES-CBC'
key = '1aec7447f7a919ef2910bd897bf869fe' -- md5('You are completely crazy')

values = '{"epoc":1528711193,"temperature":28.2,"humidity":41.1,"timestamp":"2018-06-11T09:59:53","client_id":"esp8266-1458415"}'
iv = 'tARGGrNw39xRlQ4D' -- length of 16 chars

print('length of values : '..#values)
print('key : '..key)
print('iv : '..iv)

buf = values..'               ' -- 15 spaces
n = #buf - #buf % 16 -- divided by 16

print('Encrypted values :')
print(crypto.toBase64(crypto.encrypt(method, key, buf:sub(1, n), iv)))

-- Result :
-- wq+4YetP0xCK8S0nPEK5gw3AdSk9T6Q0VX2yD8/8gMYIQ8urafkmfDvN6EPR6+1jjh8uzJQ+vjVweqyH+Sk/8vgRP5zzUADSGWRZ1r+f2tBOMjCmidJTOejWaHLFx1t62vp/qHNFFrPbVuSxBJeja3/UVi9k1lE9e5kQvNnO/6o=

encrypt.php

#!/usr/bin/env php
<?php

# http://php.net/manual/fr/function.openssl-encrypt.php

$key = '1aec7447f7a919ef2910bd897bf869fe'; # md5('You are completely crazy')

$values = '{"epoc":1528711193,"temperature":28.2,"humidity":41.1,"timestamp":"2018-06-11T09:59:53","client_id":"esp8266-1458415"}';
$iv = 'tARGGrNw39xRlQ4D'; # length of 16 chars

# $method = 'aes-128-cbc';
$method = 'aes-256-cbc';

echo "Encryption with \"$method\" method\n";
echo 'Length of values : '.strlen($values)."\n";
echo "key : $key\n";
echo "iv : $iv\n";
$buf = $values.str_repeat(' ', 15);
$n = strlen($buf) - strlen($buf) % 16; # divided by 16
echo "$n\n";

echo "Encrypted  values :\n";
echo openssl_encrypt(substr($buf, 0, $n), $method, $key, OPENSSL_ZERO_PADDING, $iv);
echo "\n";

# Results :
# with PHP 7.1.17-0ubuntu0.17.10.1
# wq+4YetP0xCK8S0nPEK5gw3AdSk9T6Q0VX2yD8/8gMYIQ8urafkmfDvN6EPR6+1jjh8uzJQ+vjVweqyH+Sk/8vgRP5zzUADSGWRZ1r+f2tBOMjCmidJTOejWaHLFx1t62vp/qHNFFrPbVuSxBJeja3/UVi9k1lE9e5kQvNnO/6o=

encrypt.py

#!//usr/bin/env python3
# -*- coding: utf-8  -*-

from Crypto.Cipher import AES
import base64

key = '1aec7447f7a919ef2910bd897bf869fe' # md5('You are completely crazy')
values = '{"epoc":1528711193,"temperature":28.2,"humidity":41.1,"timestamp":"2018-06-11T09:59:53","client_id":"esp8266-1458415"}'
iv = 'tARGGrNw39xRlQ4D' # length of 16 chars

print('''
Length of values : %d
key : %s
iv : %s
''' % (len(values), key, iv))

buf = values + '               '
n = len(buf) - len(buf) % 16
encoder = AES.new(key, mode=AES.MODE_CBC, IV=iv)
data = encoder.encrypt(buf[0:n])

print('Encrypted values : ')
print(base64.b64encode(data))

# Result :
# b'wq+4YetP0xCK8S0nPEK5gw3AdSk9T6Q0VX2yD8/8gMYIQ8urafkmfDvN6EPR6+1jjh8uzJQ+vjVweqyH+Sk/8vgRP5zzUADSGWRZ1r+f2tBOMjCmidJTOejWaHLFx1t62vp/qHNFFrPbVuSxBJeja3/UVi9k1lE9e5kQvNnO/6o='