Online Base64 Encoder

There are many string to bytes conversion question about Python 3 on Stackoverflow, each one treating slightly different cases, and as I couldn't find this specific one, I'll answer my own question here.

Some fields of a webservice, e.g. those that transport files like a PDF document, may do that base64 encoded.

It Python 2 this did work:

with open(filepath, 'w') as file_:    file_.write(my_content.decode('base64'))

Now, in Suds on Python 3 the equivalent would be:

from base64 import b64decodefile_.write(b64decode(my_content))

But this results in an error: a bytes-like object is required, not 'Text'.

I've heard people talking about "base 64 encoding" here and there. What is it used for?

I have a cryptographic text which is encrypted using AES. During decryption I am trying to decode the encrypted string using base64.URLEncoding.DecodeString(securemsg) first. But it shows me illegal base64 data at input byte 18..

The encryptyed text is: "hsOqHziRT3C5ESWns8/JJd0vbLdYadqNZEDxLoP97Venj1lx9xg7kZinU/YW4IcuYbirCwZz265F\nUruEOv8Uan5hGoKk8noCr...."

The 18th byte is \ which is a valid base64 encoded character. I have found out the original string was encrypted and was base64 encoded using sun.misc.BASE64Encoder java class(which follows RFC1521). Is this error due to different encoding schemes, or am I missing something else. Point me in the right direction. My code for decryption:

func decrypt(key []byte, securemess string) (decodedmess string, err error) {cipherText, err := base64.URLEncoding.DecodeString(securemess)if err != nil {    return}block, err := aes.NewCipher(key)if err != nil {    return}if len(cipherText) < aes.BlockSize {    err = errors.New("Ciphertext block size is too short!")    return}//IV needs to be unique, but doesn't have to be secure.//It's common to put it at the beginning of the ciphertext.iv := cipherText[:aes.BlockSize]cipherText = cipherText[aes.BlockSize:]stream := cipher.NewCFBDecrypter(block, iv)// XORKeyStream can work in-place if the two arguments are the same.stream.XORKeyStream(cipherText, cipherText)decodedmess = string(cipherText)return}

I am writing an App which does the following with a given String str:

encode(encrypt(encode(stringToBytearray(str))));

The Server receives the Base64 encoded String, which is then decoded -> decrypted -> decoded, to get the sent String str from the App.

Unfortunately it doesnt work for all Strings, long Strings lead to a long Base64 String and my Server throws the following Exception:

Exception in thread "main" java.lang.IllegalArgumentException: Illegal base64 character 5b at java.util.Base64$Decoder.decode0(Base64.java:714) at java.util.Base64$Decoder.decode(Base64.java:526) at Main.decode(Main.java:113) at Main.main(ain.java:33)

The String has the format "[string, string, ..., string]" without "s.

Like I mentioned above, for Strings which are not too long (sorry I cant quantify the length yet), this works. So I think I implemented it right.

Whats weird is, that if I dont send it, but decode(decrypt(decode(stringToBytearray(str)))); the String on the Device itself, it all works perfectly.

My Setup:JDK 7, eclipse (adt-bundle, android development) (Windows 7)

JDK 8, eclipse ('normal' java) (Linux (xubuntu))

Is it because both Classes (Base64) are implemented diffrently? If so, how can I make it work?

Here are the Encoding/Decoding Methods:

Encoding (Device: on Windows 7, adt-bundle, Android-Dev, jdk 7):

import android.util.Base64public byte[] encode(byte[] bytearrayToEncode){   return Base64.encode(bytearrayToEncode, Base64.NO_WRAP|Base64.URL_SAFE);}

Decoding (Server: on Linux, jdk 8):

import java.util.Base64public byte[] decode(byte[] bytearrayToEncode){   return Base64.getUrlDecoder().decode(bytearrayToDecode);}

Strings are all De-/Encoded with the same charset (utf-8)!Encoding/Decoding: Base64

Crypto: AES

If you need more Information, just ask, but I think I provided all neccessary informations.

Edit:

public String bytearrayToString(byte[] bytearray){    String str = null;    try {        str = new String(bytearray, "UTF-8");    } catch (UnsupportedEncodingException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    return str;}public byte[] stringToBytearray(String str){    byte[] bytearray = null;    try {        bytearray = str.getBytes("UTF-8");    } catch (UnsupportedEncodingException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    return bytearray;}

I'm trying to add an image that I get from another service to my odoo module trough the Web Service API (xmlrpclib). I'm having an error possibly with the encoding.

Error when I open the product in the browser:

Image that I try to add (I'm downloading the exact content of that image trough the 2ba API):

https://api.2ba.nl/1/json/Thumbnail/TradeItem?gln=8711389000001&tradeItemId=9834942

Encoding:

return base64.b64encode(api_call_response.text.encode('utf-8'))

I added the encode('utf-8') at the end because otherwise I get an error like: 'ascii' codec can't encode character u'\ufffd' in position. This way I get the same output as https://www.freeformatter.com/base64-encoder.html

Adding the image:

Nothing fancy. I just added the field to my already working variable:

import functoolsimport xmlrpclib......product['image']        = get_image(api_url, query)create_record('sync2ba.products', product)

Module:

_name = 'sync2ba.products'_rec_name = 'ProductId'image                           = fields.Binary()

View:

    <record model="ir.ui.view" id="products_form_view">        <field name="name">products.form</field>        <field name="model">sync2ba.products</field>        <field name="arch" type="xml">            <form string="Products Form">                <sheet>                    <group>                        <field name="image" widget="image" class="oe_avatar"/>......