Base64 are removing dots from string

Question

I am trying to transform a string to byte and then get again as string, but the result was different. Have a look:

To decode:

byte[] tokenInBytes = Base64.decode(token, mFlags);
mTokenPreference.put(Base64.encodeToString(tokenInBytes, mFlags));

To get like a string again:

String value = Base64.encodeToString(tokenInBytes, mFlags);

The original string (before decode): eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjVhMDA2ZTI4OGQ4ZDc1Z

And after was (after encode): eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9eyJpZCI6IjVhMDA2ZTI4OGQ4ZDc1Z

Dots was removed. Anyone knows what I did wrong?

The value of mFlags was:

int mFlags = Base64.NO_WRAP | Base64.URL_SAFE | Base64.NO_PADDING;

Put the original string in your code in order to make a reproducable post. — greenapps, Nov 27 '17 at 13:26
`trying to transform to byte `. What is it that you are trying to transform to byte? — greenapps, Nov 27 '17 at 13:27
`Put the original string in your code in order to make a reproducable post`. Why didnt you take the effort to do so? — greenapps, Nov 27 '17 at 17:40
`transform a string to byte `. Which string? And what does it contain? Please write a clear post! — greenapps, Nov 27 '17 at 17:43
@greenapps `eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjVhMDA2ZTI4OGQ4ZDc1Z`, I put this in post. — Rafaela Lourenço, Nov 27 '17 at 17:45
Yes you already told that. Dont repeat yourself. But use it in your code. You are not using it in your code are you!? Assing it to token to begin with. That is what i asked. — greenapps, Nov 27 '17 at 17:46

score 0 · Answer 1 · answered Nov 27 '17 at 13:27

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You can replace your string value (dot) with any letter then after encode and decode replace same letter with dot.

answered Nov 27 '17 at 13:27

ankur bhut

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score 0 · Answer 2 · edited Dec 05 '18 at 16:53

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I got this code from this link

// Sending side
byte[] data = value.getBytes("UTF-8");
String base64 = Base64.encodeToString(data, Base64.DEFAULT);

// Receiving side
byte[] data = Base64.decode(base64, Base64.DEFAULT);
String value = new String(data, "UTF-8");

edited Dec 05 '18 at 16:53

Willi Mentzel

27,862
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answered Nov 27 '17 at 14:17

Vivek Barai

1,338
13
26

@RafaelaLourenço as it a special character i think you should do like this String encodeStr =URLEncoder.encode( yourstring, "UTF-8" ); // Sending side byte[] data = value.getBytes("UTF-8"); String base64 = Base64.encodeToString(encodeStr, Base64.DEFAULT); // Receiving side byte[] data = Base64.decode(base64, Base64.DEFAULT); String value = new String(data, "UTF-8"); String decodeString = URLDecoder.decode( value, "UTF-8" ); – Vivek Barai Dec 05 '17 at 17:04

Base64 are removing dots from string

2 Answers2