網上的Base64解碼器

How can I decode a base64 string in Node.js that was encoded in PHP like:

base64_encode(openssl_encrypt ('password', "AES-256-CBC",  'keyforthepassword',  OPENSSL_RAW_DATA, '6114'))

6114 is an ID of a person.

To decode this in PHP, I would run:

openssl_decrypt(base64_decode ('encoded_password'), "AES-256-CBC", 'keyforthepassword', OPENSSL_RAW_DATA, '6114')

How can I do the above decrypting in Node.js?

I was looking into my Mail Server in Text version; There is saw an attachment of filename= xyz.xslx & Content-Transfer-Encoding: base-64 and after that there was stream of Base64 encoded Code. Initially the content-type was Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;

Now, Is it possible to convert the base-64 encoded string code to retrieve the xslx document? I tried using several online sites like base64decode.org but as the initial file type was xslx, it didn't gave any output in Plain-Text too. So how do i work out with issue ?

So I'm stumped. I know there's lots of Base64 encoders/decoders for JS, but not for the modified (and Facebook-favored) Base64URL variation. So far searching across stackoverflow has come up dry.

Yes, I could use PHP or another server-side library to decode this, but I'm trying to keep this universal regardless of what platform I'm using... for example, if I were to host a HTML-only Facebook app on Amazon S3/CloudFront and only use their JS SDK and jQuery to take care of processing forms and getting data.

That said, does anyone know of any Base64URL-specific decoders for JavaScript?

Thanks in advance!

I'm sending the contents of this Flex form (Don't ask why) over to node. There is a post paramteter called "photo" which is a base64 encoded image.

Contents of photo get sent over ok. Problem is when I am trying to decode the content and write them to a file.

  var fs = require("fs");  fs.writeFile("arghhhh.jpg", new Buffer(request.body.photo, "base64").toString(), function(err) {});

I've tried toString("binary") as well. But it seems node doesnt decode all of the content. It seems it only decodes jpg header info and leaves the rest.

Can anyone please help me with this?

Thanks

I try to find a way to encode and decode strings with the use of java.util.Base64.Encoder and Decoder classes. Unfortunately, it is impossible to call encode and decode methods statically, so I've created references to Encoder and Decoder classes. But in order to create an instance object for each of those references I need to cast some arguments into constructors. To be honest I don't have even a clue what arguments I can cast to them. API documentation remains silent https://docs.oracle.com/javase/8/docs/api/java/util/Base64.Encoder.html. Below is my almost working example, which throws NullPointerException because of lack of Encoder instance.

import java.util.Base64.Encoder;import java.util.Base64.Decoder;public class NumberCipher {    private static Encoder encoder;    private static Decoder decoder;    public static void main(String[] args) {        String test = "There is no clue about Batman and Robin tryst at 43 Joker Street Motel.";        String test_enc = encode(test);        String test_dec = decode(test_enc);        System.out.println(test);        System.out.println(test_enc);        System.out.println(test_dec);    }    public static String decode(String toDecode) {        byte[] bytesDecoded = decoder.decode(toDecode.getBytes());        String decoded = new String(bytesDecoded);        return decoded;    }    public static String encode(String toEncode) {        byte[] bytesEncoded = encoder.encode(toEncode.getBytes());        String encoded = new String(bytesEncoded);        return encoded;    }}