7/6/2023 0 Comments Purpose of base64 encoding![]() String value = "hello world" īase64.Encoder encoder = Base64.getEncoder() Let’s see how can we encode a simple string like “ hello world”. In order to encode any string, we need to first convert it into a bytes array. To encode any string, we can use the encodeToString() method of Encoder class which is an inner class of Base64. Such encoded data must be decoded locally on your system to avoid any security risk.īase64 encoding and decoding capabilities were added in java8 via the 64 utility class. You might have come across some websites which instantly perform the encoding and decoding for the user.īut is it safe to use an external platform for decoding and encoding your passwords? Definitely not, as the site might be saving your data in the backend. But what exactly is base64? Base64 is an encoding format which maps the input to a set of characters in the A-Za-z0–9+/ character set. Often, the access token we use, Kubernetes external secrets, or database passwords are encoded in base64 format. Base64 is particularly prevalent on the World Wide Web where one of its uses is the ability to embed image files or other binary assets inside textual assets such as HTML and CSS files.We often felt the need for encoding or decoding base64 strings. >Common to all binary-to-text encoding schemes, Base64 is designed to carry data stored in binary formats across channels that only reliably support text content. Fuck's sake, read a goddamn wikipedia article for once in your life. You don't know a damn thing about what you are talking about. its just like torrents, 99.99999% is copyright infringement Nobody cares what it's ":supposed" to be for. ![]() Not only do they fail to handle nested tags, but they are a waste of time to construct when there are entire software libraries dedicated to parsing HTML correctly.ĩ9% of base64 is to get around something and that' sjust the facts, even israeliteed up AI refuses to respond to things it thinks are base64 encoded Regular expressions are completely inappropriate. In practical usage, HTML is parsed by tokenizing it and converting it into an abstract syntax tree. If you cannot fool a human, you cannot fool a programmer who can visually notice your attempts to evade his detection scripts, and incorporate them into his scripts. In the context of magnet links, which is what OP was originally talking about, you can write a regex to match each of its component fields, including the base64 parts. While it's nonsensical to write a regex to check for "any base64 string", those strings do not occur in a vacuum. You should consider the rest of that line. >no shit, it matches to omuch to be useful Any way this substring is sliced up according to the rules of the pumping lemma will result in a string that, if pumped, will generate a new string that is invalid in HTML by containing either too many opening tags, too many closing tags, or an invalid tag. This can be proven with the pumping lemma by considering a string with n copies of the tag followed by n copies of its closing tag, which can be a substring in any valid HTML document. You can't parse HTML with regex because HTML is not a regular language. ![]() It's to turn binary data into ASCII, nothing more.ģ. Regardless, the point is not whether it can be used for obfuscation, but whether its intended purpose is obfuscation, which is not the case at all. ![]() The only people who would be fooled by it are those who are not technologically inclined. Base64 is a poor form of obfuscation because it is easily recognized by the human eye, and any computer scientist worth his salt can know how to decode it within seconds. That said, it is possible to write a regex for all valid magnet links.Ģ. The only problem with doing so is that it matches a fuckload of other text as well. You can absolutely make a regex for base64 text. It does obfuscate and works for it, cope and seethe, you probably get mad that regex works for parsing htmlġ. Both contain file hashes.īut how do you tell that a given string is base64 or not without attempting to decode it? its basically stenography in plain sight if you cant make a regex for it There are only two components of a magnet link that may contain Base64 encoded data: the exact topic (xt) field and the manifest topic (mt) field. ![]()
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