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authorMinteck <contact@minteck.org>2022-10-18 08:59:09 +0200
committerMinteck <contact@minteck.org>2022-10-18 08:59:09 +0200
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+/**
+ * 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
+ * @author Dave Longley
+ *
+ * Copyright (c) 2012 Stefan Siegl <stesie@brokenpipe.de>
+ * Copyright (c) 2012-2014 Digital Bazaar, Inc.
+ */
+(function() {
+/* ########## Begin module implementation ########## */
+function initModule(forge) {
+
+/* DES API */
+forge.des = forge.des || {};
+
+/**
+ * Deprecated. Instead, use:
+ *
+ * var cipher = forge.cipher.createCipher('DES-<mode>', key);
+ * cipher.start({iv: iv});
+ *
+ * Creates an DES cipher object to encrypt data 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 binary-encoded strings of bytes or
+ * byte buffers.
+ *
+ * @param key the symmetric key to use (64 or 192 bits).
+ * @param iv the initialization vector to use.
+ * @param output the buffer to write to, null to create one.
+ * @param mode the cipher mode to use (default: 'CBC' if IV is
+ * given, 'ECB' if null).
+ *
+ * @return the cipher.
+ */
+forge.des.startEncrypting = function(key, iv, output, mode) {
+ var cipher = _createCipher({
+ key: key,
+ output: output,
+ decrypt: false,
+ mode: mode || (iv === null ? 'ECB' : 'CBC')
+ });
+ cipher.start(iv);
+ return cipher;
+};
+
+/**
+ * Deprecated. Instead, use:
+ *
+ * var cipher = forge.cipher.createCipher('DES-<mode>', key);
+ *
+ * Creates an DES cipher object to encrypt data using the given symmetric key.
+ *
+ * The key may be given as a binary-encoded string of bytes or a byte buffer.
+ *
+ * @param key the symmetric key to use (64 or 192 bits).
+ * @param mode the cipher mode to use (default: 'CBC').
+ *
+ * @return the cipher.
+ */
+forge.des.createEncryptionCipher = function(key, mode) {
+ return _createCipher({
+ key: key,
+ output: null,
+ decrypt: false,
+ mode: mode
+ });
+};
+
+/**
+ * Deprecated. Instead, use:
+ *
+ * var decipher = forge.cipher.createDecipher('DES-<mode>', key);
+ * decipher.start({iv: iv});
+ *
+ * Creates an DES cipher object to decrypt data 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 binary-encoded strings of bytes or
+ * byte buffers.
+ *
+ * @param key the symmetric key to use (64 or 192 bits).
+ * @param iv the initialization vector to use.
+ * @param output the buffer to write to, null to create one.
+ * @param mode the cipher mode to use (default: 'CBC' if IV is
+ * given, 'ECB' if null).
+ *
+ * @return the cipher.
+ */
+forge.des.startDecrypting = function(key, iv, output, mode) {
+ var cipher = _createCipher({
+ key: key,
+ output: output,
+ decrypt: true,
+ mode: mode || (iv === null ? 'ECB' : 'CBC')
+ });
+ cipher.start(iv);
+ return cipher;
+};
+
+/**
+ * Deprecated. Instead, use:
+ *
+ * var decipher = forge.cipher.createDecipher('DES-<mode>', key);
+ *
+ * Creates an DES cipher object to decrypt data using the given symmetric key.
+ *
+ * The key may be given as a binary-encoded string of bytes or a byte buffer.
+ *
+ * @param key the symmetric key to use (64 or 192 bits).
+ * @param mode the cipher mode to use (default: 'CBC').
+ *
+ * @return the cipher.
+ */
+forge.des.createDecryptionCipher = function(key, mode) {
+ return _createCipher({
+ key: key,
+ output: null,
+ decrypt: true,
+ mode: mode
+ });
+};
+
+/**
+ * Creates a new DES cipher algorithm object.
+ *
+ * @param name the name of the algorithm.
+ * @param mode the mode factory function.
+ *
+ * @return the DES algorithm object.
+ */
+forge.des.Algorithm = function(name, mode) {
+ var self = this;
+ self.name = name;
+ self.mode = new mode({
+ blockSize: 8,
+ cipher: {
+ encrypt: function(inBlock, outBlock) {
+ return _updateBlock(self._keys, inBlock, outBlock, false);
+ },
+ decrypt: function(inBlock, outBlock) {
+ return _updateBlock(self._keys, inBlock, outBlock, true);
+ }
+ }
+ });
+ self._init = false;
+};
+
+/**
+ * Initializes this DES algorithm by expanding its key.
+ *
+ * @param options the options to use.
+ * key the key to use with this algorithm.
+ * decrypt true if the algorithm should be initialized for decryption,
+ * false for encryption.
+ */
+forge.des.Algorithm.prototype.initialize = function(options) {
+ if(this._init) {
+ return;
+ }
+
+ var key = forge.util.createBuffer(options.key);
+ if(this.name.indexOf('3DES') === 0) {
+ if(key.length() !== 24) {
+ throw new Error('Invalid Triple-DES key size: ' + key.length() * 8);
+ }
+ }
+
+ // do key expansion to 16 or 48 subkeys (single or triple DES)
+ this._keys = _createKeys(key);
+ this._init = true;
+};
+
+
+/** Register DES algorithms **/
+
+registerAlgorithm('DES-ECB', forge.cipher.modes.ecb);
+registerAlgorithm('DES-CBC', forge.cipher.modes.cbc);
+registerAlgorithm('DES-CFB', forge.cipher.modes.cfb);
+registerAlgorithm('DES-OFB', forge.cipher.modes.ofb);
+registerAlgorithm('DES-CTR', forge.cipher.modes.ctr);
+
+registerAlgorithm('3DES-ECB', forge.cipher.modes.ecb);
+registerAlgorithm('3DES-CBC', forge.cipher.modes.cbc);
+registerAlgorithm('3DES-CFB', forge.cipher.modes.cfb);
+registerAlgorithm('3DES-OFB', forge.cipher.modes.ofb);
+registerAlgorithm('3DES-CTR', forge.cipher.modes.ctr);
+
+function registerAlgorithm(name, mode) {
+ var factory = function() {
+ return new forge.des.Algorithm(name, mode);
+ };
+ forge.cipher.registerAlgorithm(name, factory);
+}
+
+
+/** DES implementation **/
+
+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.
+ *
+ * @return the expanded keys.
+ */
+function _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)
+ // changed by Paul 16/6/2007 to use Triple DES for 9+ byte keys
+ var iterations = key.length() > 8 ? 3 : 1;
+
+ // 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, tmp;
+ for(var j = 0; j < iterations; j ++) {
+ var left = key.getInt32();
+ var right = key.getInt32();
+
+ tmp = ((left >>> 4) ^ right) & 0x0f0f0f0f;
+ right ^= tmp;
+ left ^= (tmp << 4);
+
+ tmp = ((right >>> -16) ^ left) & 0x0000ffff;
+ left ^= tmp;
+ right ^= (tmp << -16);
+
+ tmp = ((left >>> 2) ^ right) & 0x33333333;
+ right ^= tmp;
+ left ^= (tmp << 2);
+
+ tmp = ((right >>> -16) ^ left) & 0x0000ffff;
+ left ^= tmp;
+ right ^= (tmp << -16);
+
+ tmp = ((left >>> 1) ^ right) & 0x55555555;
+ right ^= tmp;
+ left ^= (tmp << 1);
+
+ tmp = ((right >>> 8) ^ left) & 0x00ff00ff;
+ left ^= tmp;
+ right ^= (tmp << 8);
+
+ tmp = ((left >>> 1) ^ right) & 0x55555555;
+ right ^= tmp;
+ left ^= (tmp << 1);
+
+ // right needs to be shifted and OR'd with last four bits of left
+ tmp = (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 = tmp;
+
+ // 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 lefttmp = (
+ 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 righttmp = (
+ 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]);
+ tmp = ((righttmp >>> 16) ^ lefttmp) & 0x0000ffff;
+ keys[n++] = lefttmp ^ tmp;
+ keys[n++] = righttmp ^ (tmp << 16);
+ }
+ }
+
+ return keys;
+}
+
+/**
+ * Updates a single block (1 byte) using DES. The update will either
+ * encrypt or decrypt the block.
+ *
+ * @param keys the expanded keys.
+ * @param input the input block (an array of 32-bit words).
+ * @param output the updated output block.
+ * @param decrypt true to decrypt the block, false to encrypt it.
+ */
+function _updateBlock(keys, input, output, decrypt) {
+ // set up loops for single or triple DES
+ var iterations = keys.length === 32 ? 3 : 9;
+ var looping;
+ if(iterations === 3) {
+ looping = decrypt ? [30, -2, -2] : [0, 32, 2];
+ } else {
+ looping = (decrypt ?
+ [94, 62, -2, 32, 64, 2, 30, -2, -2] :
+ [0, 32, 2, 62, 30, -2, 64, 96, 2]);
+ }
+
+ var tmp;
+
+ var left = input[0];
+ var right = input[1];
+
+ // first each 64 bit chunk of the message must be permuted according to IP
+ tmp = ((left >>> 4) ^ right) & 0x0f0f0f0f;
+ right ^= tmp;
+ left ^= (tmp << 4);
+
+ tmp = ((left >>> 16) ^ right) & 0x0000ffff;
+ right ^= tmp;
+ left ^= (tmp << 16);
+
+ tmp = ((right >>> 2) ^ left) & 0x33333333;
+ left ^= tmp;
+ right ^= (tmp << 2);
+
+ tmp = ((right >>> 8) ^ left) & 0x00ff00ff;
+ left ^= tmp;
+ right ^= (tmp << 8);
+
+ tmp = ((left >>> 1) ^ right) & 0x55555555;
+ right ^= tmp;
+ left ^= (tmp << 1);
+
+ // rotate left 1 bit
+ 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];
+
+ // passing these bytes through the S selection functions
+ tmp = left;
+ left = right;
+ right = tmp ^ (
+ 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]);
+ }
+ // unreverse left and right
+ tmp = left;
+ left = right;
+ right = tmp;
+ }
+
+ // rotate right 1 bit
+ left = ((left >>> 1) | (left << 31));
+ right = ((right >>> 1) | (right << 31));
+
+ // now perform IP-1, which is IP in the opposite direction
+ tmp = ((left >>> 1) ^ right) & 0x55555555;
+ right ^= tmp;
+ left ^= (tmp << 1);
+
+ tmp = ((right >>> 8) ^ left) & 0x00ff00ff;
+ left ^= tmp;
+ right ^= (tmp << 8);
+
+ tmp = ((right >>> 2) ^ left) & 0x33333333;
+ left ^= tmp;
+ right ^= (tmp << 2);
+
+ tmp = ((left >>> 16) ^ right) & 0x0000ffff;
+ right ^= tmp;
+ left ^= (tmp << 16);
+
+ tmp = ((left >>> 4) ^ right) & 0x0f0f0f0f;
+ right ^= tmp;
+ left ^= (tmp << 4);
+
+ output[0] = left;
+ output[1] = right;
+}
+
+/**
+ * Deprecated. Instead, use:
+ *
+ * forge.cipher.createCipher('DES-<mode>', key);
+ * forge.cipher.createDecipher('DES-<mode>', key);
+ *
+ * Creates a deprecated DES cipher object. This object's mode will default to
+ * CBC (cipher-block-chaining).
+ *
+ * The key may be given as a binary-encoded string of bytes or a byte buffer.
+ *
+ * @param options the options to use.
+ * key the symmetric key to use (64 or 192 bits).
+ * output the buffer to write to.
+ * decrypt true for decryption, false for encryption.
+ * mode the cipher mode to use (default: 'CBC').
+ *
+ * @return the cipher.
+ */
+function _createCipher(options) {
+ options = options || {};
+ var mode = (options.mode || 'CBC').toUpperCase();
+ var algorithm = 'DES-' + mode;
+
+ var cipher;
+ if(options.decrypt) {
+ cipher = forge.cipher.createDecipher(algorithm, options.key);
+ } else {
+ cipher = forge.cipher.createCipher(algorithm, options.key);
+ }
+
+ // backwards compatible start API
+ var start = cipher.start;
+ cipher.start = function(iv, options) {
+ // backwards compatibility: support second arg as output buffer
+ var output = null;
+ if(options instanceof forge.util.ByteBuffer) {
+ output = options;
+ options = {};
+ }
+ options = options || {};
+ options.output = output;
+ options.iv = iv;
+ start.call(cipher, options);
+ };
+
+ return cipher;
+}
+
+
+} // end module implementation
+
+/* ########## Begin module wrapper ########## */
+var name = 'des';
+if(typeof define !== 'function') {
+ // NodeJS -> AMD
+ if(typeof module === 'object' && module.exports) {
+ var nodeJS = true;
+ define = function(ids, factory) {
+ factory(require, module);
+ };
+ } else {
+ // <script>
+ if(typeof forge === 'undefined') {
+ forge = {};
+ }
+ return initModule(forge);
+ }
+}
+// AMD
+var deps;
+var defineFunc = function(require, module) {
+ module.exports = function(forge) {
+ var mods = deps.map(function(dep) {
+ return require(dep);
+ }).concat(initModule);
+ // handle circular dependencies
+ forge = forge || {};
+ forge.defined = forge.defined || {};
+ if(forge.defined[name]) {
+ return forge[name];
+ }
+ forge.defined[name] = true;
+ for(var i = 0; i < mods.length; ++i) {
+ mods[i](forge);
+ }
+ return forge[name];
+ };
+};
+var tmpDefine = define;
+define = function(ids, factory) {
+ deps = (typeof ids === 'string') ? factory.slice(2) : ids.slice(2);
+ if(nodeJS) {
+ delete define;
+ return tmpDefine.apply(null, Array.prototype.slice.call(arguments, 0));
+ }
+ define = tmpDefine;
+ return define.apply(null, Array.prototype.slice.call(arguments, 0));
+};
+define(
+ ['require', 'module', './cipher', './cipherModes', './util'], function() {
+ defineFunc.apply(null, Array.prototype.slice.call(arguments, 0));
+});
+})();