1 files changed, 110 insertions, 0 deletions
diff --git a/webclients/novnc/core/base64.js b/webclients/novnc/core/base64.js
new file mode 100644
index 0000000..5182c29
--- /dev/null
+++ b/webclients/novnc/core/base64.js
@@ -0,0 +1,110 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// From: http://hg.mozilla.org/mozilla-central/raw-file/ec10630b1a54/js/src/devtools/jint/sunspider/string-base64.js
+
+import * as Log from './util/logging.js';
+
+export default {
+    /* Convert data (an array of integers) to a Base64 string. */
+    toBase64Table : 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split(''),
+    base64Pad     : '=',
+
+    encode: function (data) {
+        "use strict";
+        var result = '';
+        var toBase64Table = this.toBase64Table;
+        var length = data.length;
+        var lengthpad = (length % 3);
+        // Convert every three bytes to 4 ascii characters.
+
+        for (var i = 0; i < (length - 2); i += 3) {
+            result += toBase64Table[data[i] >> 2];
+            result += toBase64Table[((data[i] & 0x03) << 4) + (data[i + 1] >> 4)];
+            result += toBase64Table[((data[i + 1] & 0x0f) << 2) + (data[i + 2] >> 6)];
+            result += toBase64Table[data[i + 2] & 0x3f];
+        }
+
+        // Convert the remaining 1 or 2 bytes, pad out to 4 characters.
+        var j = 0;
+        if (lengthpad === 2) {
+            j = length - lengthpad;
+            result += toBase64Table[data[j] >> 2];
+            result += toBase64Table[((data[j] & 0x03) << 4) + (data[j + 1] >> 4)];
+            result += toBase64Table[(data[j + 1] & 0x0f) << 2];
+            result += toBase64Table[64];
+        } else if (lengthpad === 1) {
+            j = length - lengthpad;
+            result += toBase64Table[data[j] >> 2];
+            result += toBase64Table[(data[j] & 0x03) << 4];
+            result += toBase64Table[64];
+            result += toBase64Table[64];
+        }
+
+        return result;
+    },
+
+    /* Convert Base64 data to a string */
+    toBinaryTable : [
+        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
+        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
+        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
+        52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1,
+        -1, 0, 1, 2,  3, 4, 5, 6,  7, 8, 9,10, 11,12,13,14,
+        15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
+        -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
+        41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
+    ],
+
+    decode: function (data, offset) {
+        "use strict";
+        offset = typeof(offset) !== 'undefined' ? offset : 0;
+        var toBinaryTable = this.toBinaryTable;
+        var base64Pad = this.base64Pad;
+        var result, result_length;
+        var leftbits = 0; // number of bits decoded, but yet to be appended
+        var leftdata = 0; // bits decoded, but yet to be appended
+        var data_length = data.indexOf('=') - offset;
+
+        if (data_length < 0) { data_length = data.length - offset; }
+
+        /* Every four characters is 3 resulting numbers */
+        result_length = (data_length >> 2) * 3 + Math.floor((data_length % 4) / 1.5);
+        result = new Array(result_length);
+
+        // Convert one by one.
+        for (var idx = 0, i = offset; i < data.length; i++) {
+            var c = toBinaryTable[data.charCodeAt(i) & 0x7f];
+            var padding = (data.charAt(i) === base64Pad);
+            // Skip illegal characters and whitespace
+            if (c === -1) {
+                Log.Error("Illegal character code " + data.charCodeAt(i) + " at position " + i);
+                continue;
+            }
+
+            // Collect data into leftdata, update bitcount
+            leftdata = (leftdata << 6) | c;
+            leftbits += 6;
+
+            // If we have 8 or more bits, append 8 bits to the result
+            if (leftbits >= 8) {
+                leftbits -= 8;
+                // Append if not padding.
+                if (!padding) {
+                    result[idx++] = (leftdata >> leftbits) & 0xff;
+                }
+                leftdata &= (1 << leftbits) - 1;
+            }
+        }
+
+        // If there are any bits left, the base64 string was corrupted
+        if (leftbits) {
+            err = new Error('Corrupted base64 string');
+            err.name = 'Base64-Error';
+            throw err;
+        }
+
+        return result;
+    }
+}; /* End of Base64 namespace */