Encoding in C# and Decoding in Javascript

Question

I have encoded some text in C# like below:

var encodedCredential = Convert.ToBase64String(Encoding.Unicode.GetBytes(JsonConvert.SerializeObject("Sample text")));

The encoded String is :IgBTAGEAbQBwAGwAZQAgAHQAZQB4AHQAIgA=

I want to decode the encoded String in java script.

I have tried the below

decodeURIComponent(atob("IgBTAGEAbQBwAGwAZQAgAHQAZQB4AHQAIgA="))
decodeURIComponent(atob("IgBTAGEAbQBwAGwAZQAgAHQAZQB4AHQAIgA=").replace(' ',''))

The result is something different, There are some spaces in each letter. I cant even replace the spaces.

Just to be clear: base64 encoding/decoding is not encryption - there is no key involved, so anyone can "decrypt" this data. — vcsjones
– vcsjones, Commented May 25, 2017 at 16:18
Possible duplicate of Using Javascript's atob to decode base64 doesn't properly decode utf-8 strings — Samvel Petrosov
– Samvel Petrosov, Commented May 25, 2017 at 16:20
It is because you encoded a Unicode string. Try encoding it as an ASCII string instead (or UTF-8). — Robert McKee
– Robert McKee, Commented May 25, 2017 at 16:22

Misaz · Accepted Answer · 2017-05-25 16:21:46Z

4

You need to use UTF-8 encoding in C#. Export base64 by this command

Convert.ToBase64String(Encoding.UTF8.GetBytes("Sample text"))

answered May 25, 2017 at 16:21

Misaz

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Comments

Asim Mittal · Accepted Answer · 2017-05-25 16:25:48Z

0

@King_Fisher, you shouldn't be getting additional spaces, also the replace method will replace a single occurrence.

Here's what I did with your code (see attached screenshot)

answered May 25, 2017 at 16:25

Asim Mittal

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