/** * DES (Data Encryption Standard) implementation. * * This implementation supports DES as well as 3DES-EDE in ECB and CBC mode. * It is based on the BSD-licensed implementation by Paul Tero: * * 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. * * @author Stefan Siegl * * Copyright (c) 2012 Stefan Siegl */ (function() { /* ########## Begin module implementation ########## */ function initModule(forge) { var spfunction1 = [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 = [-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 = [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 = [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 = [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 = [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 = [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 = [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 necessary sub keys. * * @param key The 64-bit or 192-bit key * @access public * @return void */ function des_createKeys (key) { var pc2bytes0 = [0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204], pc2bytes1 = [0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101], pc2bytes2 = [0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808], pc2bytes3 = [0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000], pc2bytes4 = [0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010], pc2bytes5 = [0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420], pc2bytes6 = [0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002], pc2bytes7 = [0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800], pc2bytes8 = [0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002], pc2bytes9 = [0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408], pc2bytes10 = [0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020], pc2bytes11 = [0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200], pc2bytes12 = [0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010], pc2bytes13 = [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 = []; //now define the left shifts which need to be done var shifts = [0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0]; var n = 0, temp; for(var j = 0; j < iterations; j ++) { var left = key.getInt32(); var right = key.getInt32(); temp = ((left >>> 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 var 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]; var 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); } } return keys; } /** * Creates an DES cipher object. * * @param key the symmetric key to use (64 or 192 bits). * @param encrypt false for decryption, true for encryption. * * @return the cipher. */ var _createCipher = function(key, encrypt) { if(key.constructor == String && (key.length == 8 || key.length == 24)) { key = forge.util.createBuffer(key); } /* Create the 16 or 48 subkeys we will need. */ var keys = des_createKeys (key); /** * Mode of encryption. * * 0: ECB (Electronic Codebook) * 1: CBC (Cipher Block Chaining) */ var mode = 1; var cbcleft = 0, cbcleft2 = 0, cbcright = 0, cbcright2 = 0; var _finish = false, _input = null, _output = null; /* Set up the loops for single and triple DES. */ var iterations = keys.length == 32 ? 3 : 9; // single or triple des var looping; if(iterations == 3) { looping = encrypt ? [0, 32, 2] : [30, -2, -2]; } else { looping = encrypt ? [0, 32, 2, 62, 30, -2, 64, 96, 2] : [94, 62, -2, 32, 64, 2, 30, -2, -2]; } // Create cipher object var cipher = null; cipher = { /** * Starts or restarts the encryption or decryption process, whichever * was previously configured. * * To use the cipher in CBC mode, iv may be given either as a string * of bytes, or as a byte buffer. For ECB mode, give null as iv. * * @param iv the initialization vector to use, null for ECB mode. * @param output the output the buffer to write to, null to create one. */ start: function(iv, output) { if(iv) { if(key.constructor == String && iv.length == 8) { iv = forge.util.createBuffer(iv); } mode = 1; // CBC mode cbcleft = iv.getInt32(); cbcright = iv.getInt32(); } else { mode = 0; // ECB mode } //store the result here _finish = false; _input = forge.util.createBuffer(); _output = output || forge.util.createBuffer(); cipher.output = _output; }, /** * Updates the next block. * * @param input the buffer to read from. */ update: function(input) { if(!_finish) { // not finishing, so fill the input buffer with more input _input.putBuffer(input); } while(_input.length() >= 8) { var temp; var left = _input.getInt32(); var right = _input.getInt32(); //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 bit 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)); for(var j = 0; j < iterations; j += 3) { var endloop = looping[j+1]; var loopinc = looping[j+2]; //now go through and perform the encryption or decryption for(var i = looping[j]; i != endloop; i += loopinc) { var right1 = right ^ keys[i]; var right2 = ((right >>> 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 } //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; } } _output.putInt32(left); _output.putInt32(right); } }, /** * Finishes encrypting or decrypting. * * @param pad a padding function to use, null for PKCS#7 padding, * signature(blockSize, buffer, decrypt). * * @return true if successful, false on error. */ finish: function(pad) { var rval = true; if(encrypt) { if(pad) { rval = pad(8, _input, !encrypt); } else { // add PKCS#7 padding to block (each pad byte is the // value of the number of pad bytes) var padding = (_input.length() == 8) ? 8 : (8 - _input.length()); _input.fillWithByte(padding, padding); } } if(rval) { // do final update _finish = true; cipher.update(); } if(!encrypt) { // check for error: input data not a multiple of block size rval = (_input.length() === 0); if(rval) { if(pad) { rval = pad(8, _output, !encrypt); } else { // ensure padding byte count is valid var len = _output.length(); var count = _output.at(len - 1); if(count > len) { rval = false; } else { // trim off padding bytes _output.truncate(count); } } } } return rval; } }; return cipher; }; /* DES API */ forge.des = forge.des || {}; /** * Creates a DES cipher object to encrypt data in ECB or CBC mode using the * given symmetric key. The output will be stored in the 'output' member * of the returned cipher. * * The key and iv may be given as a string of bytes or as a byte buffer. * * @param key the symmetric key to use. * @param iv the initialization vector to use, null for ECB mode. * @param output the buffer to write to, null to create one. * * @return the cipher. */ forge.des.startEncrypting = function(key, iv, output) { var cipher = _createCipher(key, true); cipher.start(iv, output); return cipher; }; /** * Creates a DES cipher object to encrypt data in ECB or CBC mode using the * given symmetric key. * * The key may be given as a string of bytes, or as a byte buffer. * * To start encrypting call start() on the cipher with an iv and optional * output buffer. * * @param key the symmetric key to use. * * @return the cipher. */ forge.des.createEncryptionCipher = function(key) { return _createCipher(key, true); }; /** * Creates a DES cipher object to decrypt data in ECB or CBC mode using the * given symmetric key. The output will be stored in the 'output' member * of the returned cipher. * * The key and iv may be given as a string of bytes, or as a byte buffer. * * @param key the symmetric key to use. * @param iv the initialization vector to use, null for ECB mode. * @param output the buffer to write to, null to create one. * * @return the cipher. */ forge.des.startDecrypting = function(key, iv, output) { var cipher = _createCipher(key, false); cipher.start(iv, output); return cipher; }; /** * Creates a DES cipher object to decrypt data in ECB or CBC mode using the * given symmetric key. * * The key may be given as a string of bytes, or as a byte buffer. * * To start decrypting call start() on the cipher with an iv and * optional output buffer. * * @param key the symmetric key to use. * * @return the cipher. */ forge.des.createDecryptionCipher = function(key) { return _createCipher(key, false); }; } // end module implementation /* ########## Begin module wrapper ########## */ var name = 'des'; var deps = ['./util']; var nodeDefine = null; if(typeof define !== 'function') { // NodeJS -> AMD if(typeof module === 'object' && module.exports) { nodeDefine = function(ids, factory) { factory(require, module); }; } //