bzt
/
stegano
镜像来自 https://gitlab.com/bztsrc/stegano


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta name="description" content="steganography, cryptography, png, webp, hack, encrypt, decrypt">
    <meta name="author" content="bzt">
    <!--    o
           o    hi, hacker!
           ooo               -->
    <title>Steganography</title>
    <link href="logo.png" rel="shortcut icon">
    <style>
        input, textarea { font-family: monospace,fixed; }
        #url, #input { width:48%; }
        input[type="password"] { width:100%; }
        textarea { width:100%; height:100%; min-height:256px; }
        button { width:33%; }
        table { width:100%; }
        small { opacity:50%; }
        a[download] { display:none; }
        #jserr { color:white; background:red; font-weight:bold; font-size: 150%; text-align:center; padding: 32px; }
    </style>
  </head>
  <body>
    <h1>Steganography</h1>
    <div id="jserr">Please enable JavaScript</div>
    <script>document.getElementById("jserr").style.display = "none";</script>
    <p>No ads. No logs. No telemetry. No server components. Maximum privacy. It's <a href="https://gitlab.com/bztsrc/stegano">Open Source</a>, so you can even run it on your own site or locally if you don't trust gitlab (the wasm file works with a "file:///" URL in Firefox, but precompiled portable executables for Windows and Linux are also available in the <a href="https://gitlab.com/bztsrc/stegano/-/tree/main/bin">repo</a>).</p>
    <table>
        <tr><td>Image<sup>1</sup></td><td width="100%"><input id="url" onchange="geturl()" placeholder="https://...">&nbsp;&nbsp;&nbsp;<input type="file" id="input" onchange="getfile()"></td></tr>
        <tr><td>Password<sup>2</sup></td><td><input type="password" id="pass" maxlength="255"></td></tr>
        <tr><td></td><td align="center"><button onclick="load()">Load</button>&nbsp;&nbsp;&nbsp;<button onclick="save()">Save<sup>3</sup></button></td></tr>
        <tr><td>Message</td><td><textarea id="message"></textarea><br>Capacity <span id="capacity">0</span> bytes.</td></tr>
    </table>
    <small>
        <sup>1</sup> - Input image can be either an URL or a local file in WEBP, PNG, GIF or JPEG format<br>
        <sup>2</sup> - password is optional. If given, message is encrypted with military grade AES<br>
        <sup>3</sup> - the resulting image is saved in WEBP format<br>
    </small>
    <br><img src="data:type/png;base64,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" alt="GPLv3+">
    <script src="stegano.js"></script>
    <script>
        var imgdata = new Uint8Array();
        try {
            var url = document.location.href.split('?')[1];
            if(url && url != "" && url != undefined) {
                document.getElementById("url").value = url;
                geturl();
            }
        }catch(e){}
        function calccap() {
            var getcapacity = Module.cwrap("getcapacity", "number", [ "number", "number" ]);
            if(imgdata.length < 1) { alert("No input image."); return; }
            const buf = Module._malloc(imgdata.length);
            Module.HEAPU8.set(imgdata, buf);
            var cap = getcapacity(buf, imgdata.length);
            Module._free(buf);
            document.getElementById("capacity").innerText = cap.toLocaleString('en-US');
            document.getElementById("message").maxLength = cap;
            document.getElementById("message").value = "";
        }
        function load() {
            var decode = Module.cwrap("decode", "number", [ "number", "number", "number", "number", "number", "number" ]);
            var cap = document.getElementById("message").maxLength;
            var pin = new TextEncoder().encode(document.getElementById("pass").value);
            document.getElementById("message").value = "";
            if(imgdata.length < 1 || cap < 16) { alert("No input image."); return; }
            const buf = Module._malloc(imgdata.length);
            const pas = Module._malloc(pin.length+1);
            const msg = Module._malloc(cap);
            Module.HEAPU8.set(imgdata, buf);
            Module.HEAPU8.set(pin, pas);
            var len = decode(buf, imgdata.length, pas, pin.length, msg, cap);
            if(len > 0) {
                const view = new Uint8Array(Module.HEAPU8.buffer,msg,len);
                document.getElementById("message").value = new TextDecoder().decode(view);
            } else
                alert("Probably no message in image or bad password.");
            Module._free(buf);
            Module._free(pas);
            Module._free(msg);
            document.getElementById("pass").value = "";
        }
        function save() {
            var encode = Module.cwrap("encode", "number", [ "number", "number", "number", "number", "number", "number" ]);
            var txt = new TextEncoder().encode(document.getElementById("message").value);
            var pin = new TextEncoder().encode(document.getElementById("pass").value);
            if(imgdata.length < 1) { alert("No input image."); return; }
            if(txt.length < 1) { alert("No message."); return; }
            const buf = Module._malloc(128*1024*1024); /* must match MAXIMGSIZE in stegano.h */
            const pas = Module._malloc(pin.length+1);
            const msg = Module._malloc(txt.length+32);
            Module.HEAPU8.set(imgdata, buf);
            Module.HEAPU8.set(pin, pas);
            Module.HEAPU8.set(txt, msg);
            var len = encode(buf, imgdata.length, pas, pin.length, msg, txt.length);
            if(len > 0) {
                const view = new Uint8Array(Module.HEAPU8.buffer,buf,len);
                var blob = new Blob([view], { type: "image/webp" });
                var url = window.URL.createObjectURL(blob);
                var a = document.createElement("A");
                a.href = url;
                a.download = "stegano.webp";
                document.body.appendChild(a);
                a.click();
                a.remove();
                window.URL.revokeObjectURL(url);
            } else
                alert("Unable to generate output image.");
            Module._free(buf);
            Module._free(pas);
            Module._free(msg);
            document.getElementById("pass").value = "";
        }
        function geturl() {
            fetch(document.getElementById("url").value).then((response) => {
                if(response.ok) response.arrayBuffer().then((buf) => { imgdata = new Uint8Array(buf); calccap(); });
            })
            .catch((error) => alert("Unable to get url\n" + error));
        }
        function getfile() {
            var input=document.getElementById("input");
            if(input.files.length<1) {
                alert("No file given.");
            } else {
                var reader = new FileReader();
                reader.onloadend = function() { imgdata = new Uint8Array(reader.result); calccap(); };
                reader.readAsArrayBuffer(input.files[0]);
            }
        }
    </script>
  </body>
</html>