From 8580b9897935133efe1529167506134d6a4a7a55 Mon Sep 17 00:00:00 2001 From: Joel Martin Date: Tue, 6 Apr 2010 10:35:25 -0500 Subject: [PATCH] Got DES encryption of password working and colors corrected. - DES encryption for VNC bit mirrors every bytes of the password. This commit has a hard-coded mirrored password. Need to ask user and bit mirror it. - With image data across the wire it's Blue,Green,Red, so twiddle things around a bit. --- canvas.js | 4 +- include/des3.js | 223 ++++++++++++++++++++++++++++++++++++++++++++++++ vnc.html | 2 +- vnc.js | 15 ++-- 4 files changed, 233 insertions(+), 11 deletions(-) create mode 100644 include/des3.js diff --git a/canvas.js b/canvas.js index b07b4a65..60b999c5 100644 --- a/canvas.js +++ b/canvas.js @@ -123,9 +123,9 @@ init: function (canvas, width, height, keyDown, keyUp, mouseDown, mouseUp) { rfbImage: function(x, y, width, height, arr) { var img = Canvas.ctx.createImageData(width, height); for (var i=0; i < (width * height); i++) { - img.data[i*4 + 0] = arr[i*4 + 0]; + img.data[i*4 + 0] = arr[i*4 + 2]; img.data[i*4 + 1] = arr[i*4 + 1]; - img.data[i*4 + 2] = arr[i*4 + 2]; + img.data[i*4 + 2] = arr[i*4 + 0]; img.data[i*4 + 3] = 255; // Set Alpha } Canvas.ctx.putImageData(img, x, y); diff --git a/include/des3.js b/include/des3.js new file mode 100644 index 00000000..2ad329d9 --- /dev/null +++ b/include/des3.js @@ -0,0 +1,223 @@ +//Paul Tero, July 2001 +//http://www.tero.co.uk/des/ +// +//Optimised for performance with large blocks by Michael Hayworth, November 2001 +//http://www.netdealing.com +// +//THIS SOFTWARE IS PROVIDED "AS IS" AND +//ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +//IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +//ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +//FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +//DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +//OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +//HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +//LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +//OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +//SUCH DAMAGE. + + +//des +//this takes the key (byte array), the message (byte array), and whether to encrypt or decrypt +function des (key, message, encrypt, mode, iv, padding) { + //declaring this locally speeds things up a bit + var spfunction1 = new Array (0x1010400,0,0x10000,0x1010404,0x1010004,0x10404,0x4,0x10000,0x400,0x1010400,0x1010404,0x400,0x1000404,0x1010004,0x1000000,0x4,0x404,0x1000400,0x1000400,0x10400,0x10400,0x1010000,0x1010000,0x1000404,0x10004,0x1000004,0x1000004,0x10004,0,0x404,0x10404,0x1000000,0x10000,0x1010404,0x4,0x1010000,0x1010400,0x1000000,0x1000000,0x400,0x1010004,0x10000,0x10400,0x1000004,0x400,0x4,0x1000404,0x10404,0x1010404,0x10004,0x1010000,0x1000404,0x1000004,0x404,0x10404,0x1010400,0x404,0x1000400,0x1000400,0,0x10004,0x10400,0,0x1010004); + var spfunction2 = new Array (-0x7fef7fe0,-0x7fff8000,0x8000,0x108020,0x100000,0x20,-0x7fefffe0,-0x7fff7fe0,-0x7fffffe0,-0x7fef7fe0,-0x7fef8000,-0x80000000,-0x7fff8000,0x100000,0x20,-0x7fefffe0,0x108000,0x100020,-0x7fff7fe0,0,-0x80000000,0x8000,0x108020,-0x7ff00000,0x100020,-0x7fffffe0,0,0x108000,0x8020,-0x7fef8000,-0x7ff00000,0x8020,0,0x108020,-0x7fefffe0,0x100000,-0x7fff7fe0,-0x7ff00000,-0x7fef8000,0x8000,-0x7ff00000,-0x7fff8000,0x20,-0x7fef7fe0,0x108020,0x20,0x8000,-0x80000000,0x8020,-0x7fef8000,0x100000,-0x7fffffe0,0x100020,-0x7fff7fe0,-0x7fffffe0,0x100020,0x108000,0,-0x7fff8000,0x8020,-0x80000000,-0x7fefffe0,-0x7fef7fe0,0x108000); + var spfunction3 = new Array (0x208,0x8020200,0,0x8020008,0x8000200,0,0x20208,0x8000200,0x20008,0x8000008,0x8000008,0x20000,0x8020208,0x20008,0x8020000,0x208,0x8000000,0x8,0x8020200,0x200,0x20200,0x8020000,0x8020008,0x20208,0x8000208,0x20200,0x20000,0x8000208,0x8,0x8020208,0x200,0x8000000,0x8020200,0x8000000,0x20008,0x208,0x20000,0x8020200,0x8000200,0,0x200,0x20008,0x8020208,0x8000200,0x8000008,0x200,0,0x8020008,0x8000208,0x20000,0x8000000,0x8020208,0x8,0x20208,0x20200,0x8000008,0x8020000,0x8000208,0x208,0x8020000,0x20208,0x8,0x8020008,0x20200); + var spfunction4 = new Array (0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080); + var spfunction5 = new Array (0x100,0x2080100,0x2080000,0x42000100,0x80000,0x100,0x40000000,0x2080000,0x40080100,0x80000,0x2000100,0x40080100,0x42000100,0x42080000,0x80100,0x40000000,0x2000000,0x40080000,0x40080000,0,0x40000100,0x42080100,0x42080100,0x2000100,0x42080000,0x40000100,0,0x42000000,0x2080100,0x2000000,0x42000000,0x80100,0x80000,0x42000100,0x100,0x2000000,0x40000000,0x2080000,0x42000100,0x40080100,0x2000100,0x40000000,0x42080000,0x2080100,0x40080100,0x100,0x2000000,0x42080000,0x42080100,0x80100,0x42000000,0x42080100,0x2080000,0,0x40080000,0x42000000,0x80100,0x2000100,0x40000100,0x80000,0,0x40080000,0x2080100,0x40000100); + var spfunction6 = new Array (0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010); + var spfunction7 = new Array (0x200000,0x4200002,0x4000802,0,0x800,0x4000802,0x200802,0x4200800,0x4200802,0x200000,0,0x4000002,0x2,0x4000000,0x4200002,0x802,0x4000800,0x200802,0x200002,0x4000800,0x4000002,0x4200000,0x4200800,0x200002,0x4200000,0x800,0x802,0x4200802,0x200800,0x2,0x4000000,0x200800,0x4000000,0x200800,0x200000,0x4000802,0x4000802,0x4200002,0x4200002,0x2,0x200002,0x4000000,0x4000800,0x200000,0x4200800,0x802,0x200802,0x4200800,0x802,0x4000002,0x4200802,0x4200000,0x200800,0,0x2,0x4200802,0,0x200802,0x4200000,0x800,0x4000002,0x4000800,0x800,0x200002); + var spfunction8 = new Array (0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000); + + //create the 16 or 48 subkeys we will need + var keys = des_createKeys (key); + var m=0, i, j, temp, temp2, right1, right2, left, right, looping; + var cbcleft, cbcleft2, cbcright, cbcright2 + var endloop, loopinc; + var len = message.length; + var chunk = 0; + //set up the loops for single and triple des + var iterations = keys.length == 32 ? 3 : 9; //single or triple des + if (iterations == 3) {looping = encrypt ? new Array (0, 32, 2) : new Array (30, -2, -2);} + else {looping = encrypt ? new Array (0, 32, 2, 62, 30, -2, 64, 96, 2) : new Array (94, 62, -2, 32, 64, 2, 30, -2, -2);} + + //pad the message depending on the padding parameter + if (padding == 2) { + for (var i=0; i<8; i++) { message.push(" "); } //pad the message with spaces + } else if (padding == 1) { + temp = 8-(len%8); + for (var i=0; i<8; i++) { message.push(temp); }; + if (temp==8) len+=8; //PKCS7 padding + } else if (!padding) { + for (var i=0; i<8; i++) { message.push(0); } //pad the message out with null bytes + } + + //store the result here + result = []; + tempresult = []; + + if (mode == 1) { //CBC mode + cbcleft = (iv.charCodeAt(m++) << 24) | (iv.charCodeAt(m++) << 16) | (iv.charCodeAt(m++) << 8) | iv.charCodeAt(m++); + cbcright = (iv.charCodeAt(m++) << 24) | (iv.charCodeAt(m++) << 16) | (iv.charCodeAt(m++) << 8) | iv.charCodeAt(m++); + m=0; + } + + //loop through each 64 bit chunk of the message + while (m < len) { + left = (message[m++] << 24) | (message[m++] << 16) | (message[m++] << 8) | message[m++]; + right = (message[m++] << 24) | (message[m++] << 16) | (message[m++] << 8) | message[m++]; + + //for Cipher Block Chaining mode, xor the message with the previous result + if (mode == 1) {if (encrypt) {left ^= cbcleft; right ^= cbcright;} else {cbcleft2 = cbcleft; cbcright2 = cbcright; cbcleft = left; cbcright = right;}} + + //first each 64 but chunk of the message must be permuted according to IP + temp = ((left >>> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp << 4); + temp = ((left >>> 16) ^ right) & 0x0000ffff; right ^= temp; left ^= (temp << 16); + temp = ((right >>> 2) ^ left) & 0x33333333; left ^= temp; right ^= (temp << 2); + temp = ((right >>> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp << 8); + temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1); + + left = ((left << 1) | (left >>> 31)); + right = ((right << 1) | (right >>> 31)); + + //do this either 1 or 3 times for each chunk of the message + for (j=0; j>> 4) | (right << 28)) ^ keys[i+1]; + //the result is attained by passing these bytes through the S selection functions + temp = left; + left = right; + right = temp ^ (spfunction2[(right1 >>> 24) & 0x3f] | spfunction4[(right1 >>> 16) & 0x3f] + | spfunction6[(right1 >>> 8) & 0x3f] | spfunction8[right1 & 0x3f] + | spfunction1[(right2 >>> 24) & 0x3f] | spfunction3[(right2 >>> 16) & 0x3f] + | spfunction5[(right2 >>> 8) & 0x3f] | spfunction7[right2 & 0x3f]); + } + temp = left; left = right; right = temp; //unreverse left and right + } //for either 1 or 3 iterations + + //move then each one bit to the right + left = ((left >>> 1) | (left << 31)); + right = ((right >>> 1) | (right << 31)); + + //now perform IP-1, which is IP in the opposite direction + temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1); + temp = ((right >>> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp << 8); + temp = ((right >>> 2) ^ left) & 0x33333333; left ^= temp; right ^= (temp << 2); + temp = ((left >>> 16) ^ right) & 0x0000ffff; right ^= temp; left ^= (temp << 16); + temp = ((left >>> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp << 4); + + //for Cipher Block Chaining mode, xor the message with the previous result + if (mode == 1) {if (encrypt) {cbcleft = left; cbcright = right;} else {left ^= cbcleft2; right ^= cbcright2;}} + tempresult = tempresult.concat([(left>>>24), ((left>>>16) & 0xff), ((left>>>8) & 0xff), (left & 0xff), (right>>>24), ((right>>>16) & 0xff), ((right>>>8) & 0xff), (right & 0xff)]); + + chunk += 8; + if (chunk == 512) {result = result.concat(tempresult); tempresult = []; chunk = 0;} + } //for every 8 characters, or 64 bits in the message + + //return the result as an array + return result.concat(tempresult); +} //end of des + + + +//des_createKeys +//this takes as input a 64 bit key (even though only 56 bits are used) +//as an array of 2 integers, and returns 16 48 bit keys +function des_createKeys (key) { + //declaring this locally speeds things up a bit + pc2bytes0 = new Array (0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204); + pc2bytes1 = new Array (0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101); + pc2bytes2 = new Array (0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808); + pc2bytes3 = new Array (0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000); + pc2bytes4 = new Array (0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010); + pc2bytes5 = new Array (0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420); + pc2bytes6 = new Array (0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002); + pc2bytes7 = new Array (0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800); + pc2bytes8 = new Array (0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002); + pc2bytes9 = new Array (0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408); + pc2bytes10 = new Array (0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020); + pc2bytes11 = new Array (0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200); + pc2bytes12 = new Array (0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010); + pc2bytes13 = new Array (0,0x4,0x100,0x104,0,0x4,0x100,0x104,0x1,0x5,0x101,0x105,0x1,0x5,0x101,0x105); + + //how many iterations (1 for des, 3 for triple des) + var iterations = key.length > 8 ? 3 : 1; //changed by Paul 16/6/2007 to use Triple DES for 9+ byte keys + //stores the return keys + var keys = new Array (32 * iterations); + //now define the left shifts which need to be done + var shifts = new Array (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0); + //other variables + var lefttemp, righttemp, m=0, n=0, temp; + + for (var j=0; j>> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp << 4); + temp = ((right >>> -16) ^ left) & 0x0000ffff; left ^= temp; right ^= (temp << -16); + temp = ((left >>> 2) ^ right) & 0x33333333; right ^= temp; left ^= (temp << 2); + temp = ((right >>> -16) ^ left) & 0x0000ffff; left ^= temp; right ^= (temp << -16); + temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1); + temp = ((right >>> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp << 8); + temp = ((left >>> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp << 1); + + //the right side needs to be shifted and to get the last four bits of the left side + temp = (left << 8) | ((right >>> 20) & 0x000000f0); + //left needs to be put upside down + left = (right << 24) | ((right << 8) & 0xff0000) | ((right >>> 8) & 0xff00) | ((right >>> 24) & 0xf0); + right = temp; + + //now go through and perform these shifts on the left and right keys + for (var i=0; i < shifts.length; i++) { + //shift the keys either one or two bits to the left + if (shifts[i]) {left = (left << 2) | (left >>> 26); right = (right << 2) | (right >>> 26);} + else {left = (left << 1) | (left >>> 27); right = (right << 1) | (right >>> 27);} + left &= -0xf; right &= -0xf; + + //now apply PC-2, in such a way that E is easier when encrypting or decrypting + //this conversion will look like PC-2 except only the last 6 bits of each byte are used + //rather than 48 consecutive bits and the order of lines will be according to + //how the S selection functions will be applied: S2, S4, S6, S8, S1, S3, S5, S7 + lefttemp = pc2bytes0[left >>> 28] | pc2bytes1[(left >>> 24) & 0xf] + | pc2bytes2[(left >>> 20) & 0xf] | pc2bytes3[(left >>> 16) & 0xf] + | pc2bytes4[(left >>> 12) & 0xf] | pc2bytes5[(left >>> 8) & 0xf] + | pc2bytes6[(left >>> 4) & 0xf]; + righttemp = pc2bytes7[right >>> 28] | pc2bytes8[(right >>> 24) & 0xf] + | pc2bytes9[(right >>> 20) & 0xf] | pc2bytes10[(right >>> 16) & 0xf] + | pc2bytes11[(right >>> 12) & 0xf] | pc2bytes12[(right >>> 8) & 0xf] + | pc2bytes13[(right >>> 4) & 0xf]; + temp = ((righttemp >>> 16) ^ lefttemp) & 0x0000ffff; + keys[n++] = lefttemp ^ temp; keys[n++] = righttemp ^ (temp << 16); + } + } //for each iterations + //return the keys we've created + return keys; +} //end of des_createKeys + + + +////////////////////////////// TEST ////////////////////////////// +function stringToHex (s) { + var r = "0x"; + var hexes = new Array ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"); + for (var i=0; i> 4] + hexes [s.charCodeAt(i) & 0xf];} + return r; +} + +function hexToString (h) { + var r = ""; + for (var i= (h.substr(0, 2)=="0x")?2:0; i - + diff --git a/vnc.js b/vnc.js index 50a4718d..d327d648 100644 --- a/vnc.js +++ b/vnc.js @@ -105,21 +105,20 @@ init_msg: function (data) { RFB.state = "ServerInitialisation"; break; case 2: // VNC authentication - var challenge = data.shiftStr(16); - // TODO: - //var crypt = des(challenge, password); - //RFB.send_string(crypt); - RFB.state = "SecurityResult"; + var challenge = data.shiftBytes(16); debug("challenge: " + challenge + "(" + challenge.length + ")"); //response = Javacrypt.crypt(challenge, "jdm239").toString(); //response = Javacrypt.crypt("jdm239", challenge).toString(); //response = des("jdm239", challenge, 1) - /* COWCOW bit mirrored */ - passwd = [194, 242, 234, 194, 242, 234, 0, 0].shiftStr(8); + // + //passwd = [67, 79, 87, 67, 79, 87]; // 'COWCOW' + passwd = [194, 242, 234, 194, 242, 234]; // 'COWCOW' bit mirrored debug("passwd: " + passwd + "(" + passwd.length + ")"); response = des(passwd, challenge, 1) debug("reponse: " + response + "(" + response.length + ")"); - RFB.send_string(response); + + RFB.send_array(response); + RFB.state = "SecurityResult"; break; } break;