DES 算法的 Javascript、PHP 及 Perl 的源代码
下面这些源代码统统来自 tero.co.uk 网站。其中 包含了 JavaScript 实现按位工作的 DES （数据加密标准）加密算法。它支持 ECB（电子密码本(Electronic Code Book)）和 CBC（密码块链接(Cipher Block Chaining)），并且包含了 3DES 算法。它不需要任何附加库，并且同时提供了 PHP 和 Perl 的实现。使用：
des(stringkey, stringmessage, booleanencrypt, ) des 函数接受一个 8 字节字符串作为普通 DES 算法的密钥（也就是 64 位，但是算法只使用 56 位），或者接受一个 24 字节字符串作为 3DES 算法的密钥；第二个参数是要加密或解密的信息字符串；第三个布尔值参数用来说明信息是加密还是解密；接下来的可选参数 mode 如果是 0 表示 ECB 模式，1 表示 CBC 模式，默认是 ECB 模式；最后一个可选项是一个 8 字节的输入向量字符串（在 ECB 模式下不使用）。返回的密文是字符串。
下面是一些如何使用的例子。
// 使用 DES 算法（使用 8 字节的密钥）以 CBC 模式使用给出的输入向量加密信息
des("8bytekey", "This is the message.", 1, 1, "inputvec");
// 使用 3DES 算法（使用 24 字节的密钥） 以 ECB 模式加密信息
des("this is a 24 byte key !!", "This is the message.", 1);
//使用 ECB 模式的 DES 算法解密信息
des("8bytekey", "2384lf&*￡90LSdsf", 0);源码：
des.js
[*]//Javascript version
[*]//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, the message, and whether to encrypt or decrypt
[*]function des(key, message, encrypt, mode, iv){
[*]//declaring this locally speeds things up a bit
[*]var spfunction1 = newArray(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 = newArray(-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 = newArray(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 = newArray(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 = newArray(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 = newArray(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 = newArray(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 = newArray(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 ? newArray(0, 32, 2) : newArray(30, -2, -2);}
[*]else {looping = encrypt ? newArray(0, 32, 2, 62, 30, -2, 64, 96, 2) : newArray(94, 62, -2, 32, 64, 2, 30, -2, -2);}
[*]
[*]message += "\0\0\0\0\0\0\0\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.charCodeAt(m++) << 24) | (message.charCodeAt(m++) << 16) | (message.charCodeAt(m++) << 8) | message.charCodeAt(m++);
[*] right = (message.charCodeAt(m++) << 24) | (message.charCodeAt(m++) << 16) | (message.charCodeAt(m++) << 8) | message.charCodeAt(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<iterations; j+=3){
[*] endloop = looping;
[*] loopinc = looping;
[*] //now go through and perform the encryption or decryption
[*] for (i=looping; i!=endloop; i+=loopinc){//for efficiency
[*] right1 = right ^ keys;
[*] right2 = ((right >>> 4) | (right << 28)) ^ keys;
[*] //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
[*] | spfunction1[(right2 >>> 24) & 0x3f] | spfunction3[(right2 >>> 16) & 0x3f]
[*] | spfunction5[(right2 >>>8) & 0x3f] | spfunction7);
[*] }
[*] 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 += String.fromCharCode ((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 += tempresult; tempresult = ""; chunk = 0;}
[*]} //for every 8 characters, or 64 bits in the message
[*]
[*]//return the result as an array
[*]return result + 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 >= 24 ? 3 : 1;
[*]//stores the return keys
[*]var keys = newArray(32 * iterations);
[*]//now define the left shifts which need to be done
[*]var shifts = newArray(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 (varj=0; j<iterations; j++){//either 1 or 3 iterations
[*] left = (key.charCodeAt(m++) << 24) | (key.charCodeAt(m++) << 16) | (key.charCodeAt(m++) << 8) | key.charCodeAt(m++);
[*] right = (key.charCodeAt(m++) << 24) | (key.charCodeAt(m++) << 16) | (key.charCodeAt(m++) << 8) | key.charCodeAt(m++);
[*]
[*] 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 (i=0; i < shifts.length; i++){
[*] //shift the keys either one or two bits to the left
[*] if (shifts){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 | 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 | 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 = lefttemp ^ temp; keys = 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 = newArray("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
[*]for (vari=0; i<s.length; i++){r += hexes + hexes;}
[*]return r;
[*]}
[*]
[*]var key = "this is a 24 byte key !!";
[*]var message = "This is a test message";
[*]var ciphertext = des(key, message, 1, 0);
[*]document.writeln ("DES Test: " + stringToHex(ciphertext));
des.php
[*]<?php
[*]//PHP version
[*]//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
[*]//
[*]//Converted from JavaScript to PHP by Jim Gibbs, June 2004
[*]//
[*]//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, the message, and whether to encrypt or decrypt
[*]function des($key, $message, $encrypt, $mode, $iv){
[*]//declaring this locally speeds things up a bit
[*]$spfunction1 = 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);
[*]$spfunction2 = array (-0x7fef7fe0,-0x7fff8000,0x8000,0x108020,0x100000,0x20,-0x7fefffe0,-0x7fff7fe0,-0x7fffffe0,-0x7fef7fe0,-0x7fef8000,-0x80000000,-0x7fff8000,0x100000,0x20,-0x7fefffe0,0x108000,0x100020,-0x7fff7fe0,0,-0x80000000,0x8000,0x108020,-0x7ff00000,0x100020,-0x7fffffe0,0,0x108000,0x8020,-0x7fef8000,-0x7ff00000,0x8020,0,0x108020,-0x7fefffe0,0x100000,-0x7fff7fe0,-0x7ff00000,-0x7fef8000,0x8000,-0x7ff00000,-0x7fff8000,0x20,-0x7fef7fe0,0x108020,0x20,0x8000,-0x80000000,0x8020,-0x7fef8000,0x100000,-0x7fffffe0,0x100020,-0x7fff7fe0,-0x7fffffe0,0x100020,0x108000,0,-0x7fff8000,0x8020,-0x80000000,-0x7fefffe0,-0x7fef7fe0,0x108000);
[*]$spfunction3 = 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);
[*]$spfunction4 = array (0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080);
[*]$spfunction5 = 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);
[*]$spfunction6 = array (0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010);
[*]$spfunction7 = 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);
[*]$spfunction8 = array (0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000);
[*]$masks = array (4294967295,2147483647,1073741823,536870911,268435455,134217727,67108863,33554431,16777215,8388607,4194303,2097151,1048575,524287,262143,131071,65535,32767,16383,8191,4095,2047,1023,511,255,127,63,31,15,7,3,1,0);
[*]
[*]//create the 16 or 48 subkeys we will need
[*]$keys = des_createKeys ($key);
[*]$m=0;
[*]$len = strlen($message);
[*]$chunk = 0;
[*]//set up the loops for single and triple des
[*]$iterations = ((count($keys) == 32) ? 3 : 9); //single or triple des
[*]if ($iterations == 3){$looping = (($encrypt) ? array(0, 32, 2) : array(30, -2, -2));}
[*]else {$looping = (($encrypt) ? array(0, 32, 2, 62, 30, -2, 64, 96, 2) : array(94, 62, -2, 32, 64, 2, 30, -2, -2));}
[*]
[*]$message .= (chr(0) . chr(0) . chr(0) . chr(0) . chr(0) . chr(0) . chr(0) . chr(0)); //pad the message out with null bytes
[*]//store the result here
[*]$result = "";
[*]$tempresult = "";
[*]
[*]if ($mode == 1){//CBC mode
[*] $cbcleft = (ord($iv{$m++}) << 24) | (ord($iv{$m++}) << 16) | (ord($iv{$m++}) << 8) | ord($iv{$m++});
[*] $cbcright = (ord($iv{$m++}) << 24) | (ord($iv{$m++}) << 16) | (ord($iv{$m++}) << 8) | ord($iv{$m++});
[*] $m=0;
[*]}
[*]
[*]//loop through each 64 bit chunk of the message
[*]while ($m < $len){
[*] $left = (ord($message{$m++}) << 24) | (ord($message{$m++}) << 16) | (ord($message{$m++}) << 8) | ord($message{$m++});
[*] $right = (ord($message{$m++}) << 24) | (ord($message{$m++}) << 16) | (ord($message{$m++}) << 8) | ord($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 & $masks) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
[*] $temp = (($left >> 16 & $masks) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
[*] $temp = (($right >> 2 & $masks) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
[*] $temp = (($right >> 8 & $masks) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
[*] $temp = (($left >> 1 & $masks) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
[*]
[*] $left = (($left << 1) | ($left >> 31 & $masks));
[*] $right = (($right << 1) | ($right >> 31 & $masks));
[*]
[*] //do this either 1 or 3 times for each chunk of the message
[*] for ($j=0; $j<$iterations; $j+=3){
[*] $endloop = $looping[$j+1];
[*] $loopinc = $looping[$j+2];
[*] //now go through and perform the encryption or decryption
[*] for ($i=$looping[$j]; $i!=$endloop; $i+=$loopinc){//for efficiency
[*] $right1 = $right ^ $keys[$i];
[*] $right2 = (($right >> 4 & $masks) | ($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 & $masks) & 0x3f] | $spfunction4[($right1 >> 16 & $masks) & 0x3f]
[*] | $spfunction6[($right1 >>8 & $masks) & 0x3f] | $spfunction8[$right1 & 0x3f]
[*] | $spfunction1[($right2 >> 24 & $masks) & 0x3f] | $spfunction3[($right2 >> 16 & $masks) & 0x3f]
[*] | $spfunction5[($right2 >>8 & $masks) & 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 & $masks) | ($left << 31));
[*] $right = (($right >> 1 & $masks) | ($right << 31));
[*]
[*] //now perform IP-1, which is IP in the opposite direction
[*] $temp = (($left >> 1 & $masks) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
[*] $temp = (($right >> 8 & $masks) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
[*] $temp = (($right >> 2 & $masks) ^ $left) & 0x33333333; $left ^= $temp; $right ^= ($temp << 2);
[*] $temp = (($left >> 16 & $masks) ^ $right) & 0x0000ffff; $right ^= $temp; $left ^= ($temp << 16);
[*] $temp = (($left >> 4 & $masks) ^ $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;}}
[*] $tempresult .= (chr($left>>24 & $masks) . chr(($left>>16 & $masks) & 0xff) . chr(($left>>8 & $masks) & 0xff) . chr($left & 0xff) . chr($right>>24 & $masks) . chr(($right>>16 & $masks) & 0xff) . chr(($right>>8 & $masks) & 0xff) . chr($right & 0xff));
[*]
[*] $chunk += 8;
[*] if ($chunk == 512){$result .= $tempresult; $tempresult = ""; $chunk = 0;}
[*]} //for every 8 characters, or 64 bits in the message
[*]
[*]//return the result as an array
[*]return ($result . $tempresult);
[*]} //end of des
[*]
[*]//des_createKeys
[*]//this takes as input a 64 bit key (even though only 56 bits are used)
[*]//as an array of 2 integers, and returns 16 48 bit keys
[*]function des_createKeys($key){
[*]//declaring this locally speeds things up a bit
[*]$pc2bytes0= array (0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204);
[*]$pc2bytes1= array (0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101);
[*]$pc2bytes2= array (0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808);
[*]$pc2bytes3= array (0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000);
[*]$pc2bytes4= array (0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010);
[*]$pc2bytes5= array (0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420);
[*]$pc2bytes6= array (0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002);
[*]$pc2bytes7= array (0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800);
[*]$pc2bytes8= array (0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002);
[*]$pc2bytes9= array (0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408);
[*]$pc2bytes10 = array (0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020);
[*]$pc2bytes11 = array (0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200);
[*]$pc2bytes12 = array (0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010);
[*]$pc2bytes13 = array (0,0x4,0x100,0x104,0,0x4,0x100,0x104,0x1,0x5,0x101,0x105,0x1,0x5,0x101,0x105);
[*]$masks = array (4294967295,2147483647,1073741823,536870911,268435455,134217727,67108863,33554431,16777215,8388607,4194303,2097151,1048575,524287,262143,131071,65535,32767,16383,8191,4095,2047,1023,511,255,127,63,31,15,7,3,1,0);
[*]
[*]//how many iterations (1 for des, 3 for triple des)
[*]$iterations = ((strlen($key) >= 24) ? 3 : 1);
[*]//stores the return keys
[*]$keys = array (); // size = 32 * iterations but you don't specify this in php
[*]//now define the left shifts which need to be done
[*]$shifts = array (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
[*]//other variables
[*]$m=0;
[*]$n=0;
[*]
[*]for ($j=0; $j<$iterations; $j++){//either 1 or 3 iterations
[*] $left = (ord($key{$m++}) << 24) | (ord($key{$m++}) << 16) | (ord($key{$m++}) << 8) | ord($key{$m++});
[*] $right = (ord($key{$m++}) << 24) | (ord($key{$m++}) << 16) | (ord($key{$m++}) << 8) | ord($key{$m++});
[*]
[*] $temp = (($left >> 4 & $masks) ^ $right) & 0x0f0f0f0f; $right ^= $temp; $left ^= ($temp << 4);
[*] $temp = (($right >> 16 & $masks) ^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << -16);
[*] $temp = (($left >> 2 & $masks) ^ $right) & 0x33333333; $right ^= $temp; $left ^= ($temp << 2);
[*] $temp = (($right >> 16 & $masks) ^ $left) & 0x0000ffff; $left ^= $temp; $right ^= ($temp << -16);
[*] $temp = (($left >> 1 & $masks) ^ $right) & 0x55555555; $right ^= $temp; $left ^= ($temp << 1);
[*] $temp = (($right >> 8 & $masks) ^ $left) & 0x00ff00ff; $left ^= $temp; $right ^= ($temp << 8);
[*] $temp = (($left >> 1 & $masks) ^ $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 & $masks) & 0x000000f0);
[*] //left needs to be put upside down
[*] $left = ($right << 24) | (($right << 8) & 0xff0000) | (($right >> 8 & $masks) & 0xff00) | (($right >> 24 & $masks) & 0xf0);
[*] $right = $temp;
[*]
[*] //now go through and perform these shifts on the left and right keys
[*] for ($i=0; $i < count($shifts); $i++){
[*] //shift the keys either one or two bits to the left
[*] if ($shifts[$i] > 0){
[*] $left = (($left << 2) | ($left >> 26 & $masks));
[*] $right = (($right << 2) | ($right >> 26 & $masks));
[*] } else{
[*] $left = (($left << 1) | ($left >> 27 & $masks));
[*] $right = (($right << 1) | ($right >> 27 & $masks));
[*] }
[*] $left = $left & -0xf;
[*] $right = $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 & $masks] | $pc2bytes1[($left >> 24 & $masks) & 0xf]
[*] | $pc2bytes2[($left >> 20 & $masks) & 0xf] | $pc2bytes3[($left >> 16 & $masks) & 0xf]
[*] | $pc2bytes4[($left >> 12 & $masks) & 0xf] | $pc2bytes5[($left >> 8 & $masks) & 0xf]
[*] | $pc2bytes6[($left >> 4 & $masks) & 0xf];
[*] $righttemp = $pc2bytes7[$right >> 28 & $masks] | $pc2bytes8[($right >> 24 & $masks) & 0xf]
[*] | $pc2bytes9[($right >> 20 & $masks) & 0xf] | $pc2bytes10[($right >> 16 & $masks) & 0xf]
[*] | $pc2bytes11[($right >> 12 & $masks) & 0xf] | $pc2bytes12[($right >> 8 & $masks) & 0xf]
[*] | $pc2bytes13[($right >> 4 & $masks) & 0xf];
[*] $temp = (($righttemp >> 16 & $masks) ^ $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){
[*]$r = "0x";
[*]$hexes = array ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
[*]for ($i=0; $i<strlen($s); $i++){$r .= ($hexes[(ord($s{$i}) >> 4)] . $hexes[(ord($s{$i}) & 0xf)]);}
[*]return $r;
[*]}
[*]echo "<PRE>";
[*]$key = "this is a 24 byte key !!";
[*]$message = "This is a test message";
[*]$ciphertext = des ($key, $message, 1, 0, null);
[*]echo "DES Test Encrypted: " . stringToHex($ciphertext);
[*]$recovered_message = des ($key, $ciphertext, 0, 0, null);
[*]echo "\n";
[*]echo "DES Test Decrypted: " . $recovered_message;
[*]?>
des.pl
[*]#!/usr/bin/perl
[*]#Perl version
[*]#Paul Tero, July 2001
[*]#http://www.tero.co.uk/des/
[*]#
[*]#Converted from JavaScript to Perl by Chris Drake, July 2002
[*]#
[*]#Optimised for performance with large blocks by Michael Hayworth, November 2001
[*]#http://www.netdealing.com
[*]#
[*]#THIS SOFTWARE IS PROVIDED "AS IS" AND
[*]#ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
[*]#IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
[*]#ARE DISCLAIMED.IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
[*]#FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
[*]#DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
[*]#OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
[*]#HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
[*]#LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
[*]#OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
[*]#SUCH DAMAGE.
[*]
[*]use strict;
[*]
[*]#des
[*]#this takes the key, the message, and whether to encrypt or decrypt
[*]sub TripleDES{
[*]my($key, $message, $encrypt, $mode, $iv)=@_;
[*]
[*]# declaring this locally speeds things up a bit
[*]my @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);
[*]my @spfunction2 = (0x80108020,0x80008000,0x8000,0x108020,0x100000,0x20,0x80100020,0x80008020,0x80000020,0x80108020,0x80108000,0x80000000,0x80008000,0x100000,0x20,0x80100020,0x108000,0x100020,0x80008020,0,0x80000000,0x8000,0x108020,0x80100000,0x100020,0x80000020,0,0x108000,0x8020,0x80108000,0x80100000,0x8020,0,0x108020,0x80100020,0x100000,0x80008020,0x80100000,0x80108000,0x8000,0x80100000,0x80008000,0x20,0x80108020,0x108020,0x20,0x8000,0x80000000,0x8020,0x80108000,0x100000,0x80000020,0x100020,0x80008020,0x80000020,0x100020,0x108000,0,0x80008000,0x8020,0x80000000,0x80100020,0x80108020,0x108000);
[*]my @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);
[*]my @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);
[*]my @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);
[*]my @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);
[*]my @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);
[*]my @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 the 16 or 48 subkeys we will need
[*]my @keys = &des_createKeys($key);
[*]my ($m, $i, $j, $temp, $temp2, $right1, $right2, $left, $right, @looping)=(0);
[*]my ($cbcleft, $cbcleft2, $cbcright, $cbcright2);
[*]my ($endloop, $loopinc, $result, $tempresult);
[*]my $len = length($message);
[*]my $chunk = 0;
[*]#set up the loops for single and triple des
[*]my $iterations = $#keys == 32 ? 3 : 9; #single or triple des
[*]if ($iterations == 3){@looping = $encrypt ? (0, 32, 2) : (30, -2, -2);}
[*]else {@looping = $encrypt ? (0, 32, 2, 62, 30, -2, 64, 96, 2) : (94, 62, -2, 32, 64, 2, 30, -2, -2);}
[*]
[*]$message .= "\0\0\0\0\0\0\0\0"; #pad the message out with null bytes
[*]#store the result here
[*]$result = "";
[*]$tempresult = "";
[*]
[*]if ($mode == 1){#CBC mode
[*] $cbcleft = (unpack("C",substr($iv,$m++,1)) << 24) | (unpack("C",substr($iv,$m++,1)) << 16) | (unpack("C",substr($iv,$m++,1)) << 8) | unpack("C",substr($iv,$m++,1));
[*] $cbcright = (unpack("C",substr($iv,$m++,1)) << 24) | (unpack("C",substr($iv,$m++,1)) << 16) | (unpack("C",substr($iv,$m++,1)) << 8) | unpack("C",substr($iv,$m++,1));
[*] $m=0;
[*]}
[*]
[*]#loop through each 64 bit chunk of the message
[*]while ($m < $len){
[*] $left = (unpack("C",substr($message,$m++,1)) << 24) | (unpack("C",substr($message,$m++,1)) << 16) | (unpack("C",substr($message,$m++,1)) << 8) | unpack("C",substr($message,$m++,1));
[*] $right = (unpack("C",substr($message,$m++,1)) << 24) | (unpack("C",substr($message,$m++,1)) << 16) | (unpack("C",substr($message,$m++,1)) << 8) | unpack("C",substr($message,$m++,1));
[*]
[*] #for Cipher Block Chaining mode, xor the message with the previous result
[*] if ($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; $j<$iterations; $j+=3){
[*] $endloop =$looping[$j+1]; $loopinc =$looping[$j+2]; #now go through and perform the encryption or decryption
[*] for ($i=$looping[$j]; $i!=$endloop; $i+=$loopinc){#for efficiency
[*] $right1 =$right ^ $keys[$i];
[*] $right2 =(($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
[*] } #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;}}
[*] $tempresult .= pack("C*", (($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 .= $tempresult; $tempresult = ""; $chunk = 0;}
[*]} #for every 8 characters, or 64 bits in the message
[*]
[*]#return the result as an array
[*]return $result . $tempresult;
[*]} #end of des
[*]
[*]
[*]
[*]#des_createKeys
[*]#this takes as input a 64 bit key (even though only 56 bits are used)
[*]#as an array of 2 integers, and returns 16 48 bit keys
[*]sub des_createKeys{
[*]use integer;
[*]my($key)=@_;
[*]#declaring this locally speeds things up a bit
[*]my @pc2bytes0= (0,0x4,0x20000000,0x20000004,0x10000,0x10004,0x20010000,0x20010004,0x200,0x204,0x20000200,0x20000204,0x10200,0x10204,0x20010200,0x20010204);
[*]my @pc2bytes1= (0,0x1,0x100000,0x100001,0x4000000,0x4000001,0x4100000,0x4100001,0x100,0x101,0x100100,0x100101,0x4000100,0x4000101,0x4100100,0x4100101);
[*]my @pc2bytes2= (0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808,0,0x8,0x800,0x808,0x1000000,0x1000008,0x1000800,0x1000808);
[*]my @pc2bytes3= (0,0x200000,0x8000000,0x8200000,0x2000,0x202000,0x8002000,0x8202000,0x20000,0x220000,0x8020000,0x8220000,0x22000,0x222000,0x8022000,0x8222000);
[*]my @pc2bytes4= (0,0x40000,0x10,0x40010,0,0x40000,0x10,0x40010,0x1000,0x41000,0x1010,0x41010,0x1000,0x41000,0x1010,0x41010);
[*]my @pc2bytes5= (0,0x400,0x20,0x420,0,0x400,0x20,0x420,0x2000000,0x2000400,0x2000020,0x2000420,0x2000000,0x2000400,0x2000020,0x2000420);
[*]my @pc2bytes6= (0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002,0,0x10000000,0x80000,0x10080000,0x2,0x10000002,0x80002,0x10080002);
[*]my @pc2bytes7= (0,0x10000,0x800,0x10800,0x20000000,0x20010000,0x20000800,0x20010800,0x20000,0x30000,0x20800,0x30800,0x20020000,0x20030000,0x20020800,0x20030800);
[*]my @pc2bytes8= (0,0x40000,0,0x40000,0x2,0x40002,0x2,0x40002,0x2000000,0x2040000,0x2000000,0x2040000,0x2000002,0x2040002,0x2000002,0x2040002);
[*]my @pc2bytes9= (0,0x10000000,0x8,0x10000008,0,0x10000000,0x8,0x10000008,0x400,0x10000400,0x408,0x10000408,0x400,0x10000400,0x408,0x10000408);
[*]my @pc2bytes10 = (0,0x20,0,0x20,0x100000,0x100020,0x100000,0x100020,0x2000,0x2020,0x2000,0x2020,0x102000,0x102020,0x102000,0x102020);
[*]my @pc2bytes11 = (0,0x1000000,0x200,0x1000200,0x200000,0x1200000,0x200200,0x1200200,0x4000000,0x5000000,0x4000200,0x5000200,0x4200000,0x5200000,0x4200200,0x5200200);
[*]my @pc2bytes12 = (0,0x1000,0x8000000,0x8001000,0x80000,0x81000,0x8080000,0x8081000,0x10,0x1010,0x8000010,0x8001010,0x80010,0x81010,0x8080010,0x8081010);
[*]my @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)
[*]my $iterations = length($key) >= 24 ? 3 : 1;
[*]#stores the return keys
[*]my @keys; $#keys=(32 * $iterations);
[*]#now define the left shifts which need to be done
[*]my @shifts = (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
[*]#other variables
[*]my ($m, $n, $lefttemp, $righttemp, $left, $right, $temp)=(0,0);
[*]
[*]for (my$j=0; $j<$iterations; $j++){#either 1 or 3 iterations
[*] $left =(unpack("C",substr($key,$m++,1)) << 24) | (unpack("C",substr($key,$m++,1)) << 16) | (unpack("C",substr($key,$m++,1)) << 8) | unpack("C",substr($key,$m++,1));
[*] $right = (unpack("C",substr($key,$m++,1)) << 24) | (unpack("C",substr($key,$m++,1)) << 16) | (unpack("C",substr($key,$m++,1)) << 8) | unpack("C",substr($key,$m++,1));
[*]
[*] $temp = (($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 = $temp;
[*]
[*] #now go through and perform these shifts on the left and right keys
[*] for (my$i=0; $i <= $#shifts; $i++){
[*] #shift the keys either one or two bits to the left
[*] if ($shifts[$i]){
[*] no integer;
[*] $left = ($left << 2) | ($left >> 26);
[*] $right = ($right << 2) | ($right >> 26);
[*] use integer;
[*] $left<<=0;$right<<=0;
[*] } else{
[*] no integer;
[*] $left = ($left << 1) | ($left >> 27);
[*] $right = ($right << 1) | ($right >> 27);
[*] use integer;
[*] $left<<=0;$right<<=0;
[*] }
[*] $left &= 0xfffffff0; $right &= 0xfffffff0;
[*]
[*] #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 //////////////////////////////
[*]#printHexArray
[*]sub printHex{
[*]my($s)=@_;
[*]my $r = "0x";
[*]my @hexes=("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
[*]for (my$i=0; $i<length($s); $i++){$r.=$hexes . $hexes;}
[*]return $r;
[*]}
[*]
[*]
[*]
[*]print "3DES in perl\n";
[*]
[*]my $K="this is a 24 byte key !!";
[*]my $msg="This is a test message";
[*]my $ciphertext=&TripleDES($K,$msg,1,0);
[*]print "DES Test: " . &printHex($ciphertext) . "\n";
[*]my $plaintext=&TripleDES($K,$ciphertext,0,0);
[*]print "DES Test: " . $plaintext . "\n";
[*]
[*]exit(0);
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