Online Base64 Dekodér

I need to decode a base64 encoded string.

I need to do it with PHP.

The base64_decode() does not do the job.

I tried with:

base64_decode(strtr($data, '-_,', '+/='));

...it only works sometimes.

The same happens with:

base64_decode(str_pad(strtr($data, '-_', '+/'), strlen($data) % 4, '=', STR_PAD_RIGHT));

I really do not know how to approach this.

UPDATE:

The data comes from an attached file via GMAIL API.

I save it into the DB, utf8mb4 TEXT field.

I do mysqli -> real_escape_string() before inserting.

Then I extract it from the DB as $data.

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 am trying to decode data in an xml format into bytes (base64) and I am having issues. I wrote a program in java that takes a String data and converts it into bytes like this:

String data = "......"; //string of data in xml formatbyte[] dataBytes = Base64.getDecoder().decode(data);

This fails and give me and exception like this:

java.lang.IllegalArgumentException: Illegal base64 character 3c    at java.util.Base64$Decoder.decode0(Base64.java:714)    at java.util.Base64$Decoder.decode(Base64.java:526)    at java.util.Base64$Decoder.decode(Base64.java:549)    at XmlReader.main(XmlReader.java:61)

Is the xml format not compatible with base64? It seems as though the issue might be caused with the angle brackets '<>'

I was viewing https://developer.apple.com/videos/play/wwdc2017/236/ and I came across base64 encoding/decoding of objects. I have used en(de)coding previously for image store/restore.

Other than image processing, what other commonly use cases are there for this technology? It feels like there could be many use cases for this, so I'm curious what other people are using it for.

in my json file i have the following:

     {"_archive": "YnBsaXN0MDDUAQIDBAUGJidYJHZlcnNpb25YJG9iamVjdHNZJGFyY2hpdmVyVCR0b3ASAAGGoKkHCA0XGBkaGyJVJG51bGzSCQoLDFYkY2xhc3NfEBpOU0ZvbnREZXNjcmlwdG9yQXR0cmlidXRlc4AIgALTDg8JEBMWV05TLmtleXNaTlMub2JqZWN0c6IREoADgASiFBWABYAGgAdfEBNOU0ZvbnRTaXplQXR0cmlidXRlXxATTlNGb250TmFtZUF0dHJpYnV0ZSNAQgAAAAAAAF8QD0dyYXBoaWstUmVndWxhctIcHR4fWiRjbGFzc25hbWVYJGNsYXNzZXNfEBNOU011dGFibGVEaWN0aW9uYXJ5ox4gIVxOU0RpY3Rpb25hcnlYTlNPYmplY3TSHB0jJF8QEE5TRm9udERlc2NyaXB0b3KiJSFfEBBOU0ZvbnREZXNjcmlwdG9yXxAPTlNLZXllZEFyY2hpdmVy0SgpVHJvb3SAAQAIABEAGgAjAC0AMgA3AEEARwBMAFMAcAByAHQAewCDAI4AkQCTAJUAmACaAJwAngC0AMoA0wDlAOoA9QD+ARQBGAElAS4BMwFGAUkBXAFuAXEBdgAAAAAAAAIBAAAAAAAAACoAAAAAAAAAAAAAAAAAAAF4"}            },

I need to decode that and I am not sure how to do that.

This is a bplist format - Have tried decoding it with base64. it gives some results but mostly is broken. Would appreciate your help (trying to do that with python but any language is welcome)