1\u3001\u7b80\u8ff0<\/p>\n\n\n\n
1)\u3001\u8f93\u5165 64 \u4f4d\u660e\u6587\u6570\u636e\uff0c\u5e76\u8fdb\u884c\u521d\u59cb\u7f6e\u6362 IP\uff1b
2)\u3001\u5728\u521d\u59cb\u7f6e\u6362 IP \u540e\uff0c\u660e\u6587\u6570\u636e\u518d\u88ab\u5206\u4e3a\u5de6\u53f3\u4e24\u90e8\u5206\uff0c\u6bcf\u90e8\u5206 32 \u4f4d\uff0c\u4ee5 L0\uff0c
R0 \u8868\u793a\uff1b
3)\u3001\u5728\u5bc6\u94a5\u7684\u63a7\u5236\u4e0b\uff0c\u7ecf\u8fc7 16 \u8f6e\u8fd0\u7b97(f)\uff1b
4)\u300116 \u8f6e\u540e\uff0c\u5de6\u3001\u53f3\u4e24\u90e8\u5206\u4ea4\u6362\uff0c\u5e76\u8fde\u63a5\u518d\u4e00\u8d77\uff0c\u518d\u8fdb\u884c\u9006\u7f6e\u6362\uff1b
5)\u3001\u8f93\u51fa 64 \u4f4d\u5bc6\u6587\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u65f6\u53ef\u80fd\u7528\u5230\u7684\u53c2\u6570\uff1a
key\uff1a8 \u4e2a\u5b57\u8282\u5171 64 \u4f4d\u7684\u5de5\u4f5c\u5bc6\u94a5
data\uff1a8 \u4e2a\u5b57\u8282\u5171 64 \u4f4d\u7684\u9700\u8981\u88ab\u52a0\u5bc6\u6216\u88ab\u89e3\u5bc6\u7684\u6570\u636e
mode\uff1aDES \u5de5\u4f5c\u65b9\u5f0f\uff0c\u52a0\u5bc6\u6216\u8005\u89e3\u5bc6<\/p>\n\n\n\n
2\u3001\u7b80\u5355\u7684python\u5b9e\u73b0\uff08\u975epyDES\uff09<\/p>\n\n\n\n
'''\u5bc6\u94a5K\u751f\u6210\u6a21\u5757'''\n\nMaxTime = 16\n #\u751f\u6210\u5b50\u5bc6\u94a5\u7684\u7f6e\u6362\u88681\uff0c\u5c0664\u4f4d\u7684\u5bc6\u94a5\u8f6c\u6362\u4e3a56\u4f4d\nkey_table1=[ 57, 49, 41, 33, 25, 17, 9,\n 1, 58, 50, 42, 34, 26, 18,\n 10, 2, 59, 51, 43, 35, 27,\n 19, 11, 3, 60, 52, 44, 36,\n 63, 55, 47, 39, 31, 23, 15,\n 7, 62, 54, 46, 38, 30, 22,\n 14, 6, 61, 53, 45, 37, 29,\n 21, 13, 5, 28, 20, 12, 4 ]\n #\u751f\u6210\u5b50\u5bc6\u94a5\u7684\u7f6e\u6362\u88682\uff0c\u5c0656\u4f4d\u7684\u5bc6\u94a5\u8f6c\u6362\u4e3a48\u4f4d\nkey_table2=[ 14, 17, 11, 24, 1, 5,\n 3, 28, 15, 6, 21, 10,\n 23, 19, 12, 4, 26, 8,\n 16, 7, 27, 20, 13, 2,\n 41, 52, 31, 37, 47, 55,\n 30, 40, 51, 45, 33, 48,\n 44, 49, 39, 56, 34, 53,\n 46, 42, 50, 36, 29, 32 ]\n\ndef Listmove(l, step): #\u5c06\u5217\u8868\u4e2d\u7684\u5143\u7d20\u5faa\u73af\u5de6\u79fb\n return l[step:] + l[:step]\n\ndef Subkey(key): #\u751f\u6210\u5b50\u5bc6\u94a5\n keyresult = []\n key0 = [0 for i in range(56)]\n\n for i in range(len(key_table1)):\n key0[i] = key[key_table1[i]-1]\n\n #\u751f\u621016\u4e2a\u5bc6\u94a5\n for i in range(MaxTime):\n key1 = [0 for i in range(48)]\n #\u786e\u5b9a\u6bcf\u6b21\u5de6\u79fb\u7684\u6b65\u6570\n if (i == 0 or i == 1 or i == 8 or i == 15):\n step = 1\n else:\n step = 2\n #\u5206\u6210\u4e24\u7ec4\n tmp1 = key0[0:28]\n tmp2 = key0[28:56]\n #\u5faa\u73af\u5de6\u79fb\n tmp1 = Listmove(tmp1, step)\n tmp2 = Listmove(tmp2, step)\n #\u5de6\u53f3\u8fde\u63a5\n key0 = tmp1 + tmp2\n #\u7f6e\u6362\u9009\u62e9\n for i in range(len(key_table2)):\n key1[i] = key0[key_table2[i]-1]\n #\u751f\u6210\u5bc6\u94a5\n keyresult.append(key1)\n #\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u96c6\u5408\u5305\u542b\u4e86\u6bcf\u6b21\u7684\u5bc6\u94a5\n return keyresult\n\n<\/code><\/pre>\n\n\n\nimport CreateSubkey as cs\nimport F_function as f\n\n\n'''DES\u52a0\u5bc6\u6a21\u5757'''\n\n# \u5341\u516d\u8fdb\u5236\u8f6c\u4e8c\u8fdb\u5236\u6bd4\u7279\u4e32\ndef Hex2bin(text):\n result = []\n for i in range(len(text)):\n result.extend(f.int2bit(int(text[i],16)))\n return result \n\n# \u4e8c\u8fdb\u5236\u6bd4\u7279\u4e32\u8f6c\u5341\u516d\u8fdb\u5236\ndef bin2Hex(text):\n result = []\n q = len(text)\/\/4\n for i in range(q):\n dec = int(text[4*i])*8 + int(text[4*i+1])*4 + int(text[4*i+2])*2 + int(text[4*i+3])*1\n x = hex(dec)[2:].upper()\n result.extend(x)\n rs = ''.join(result)\n return rs\n\n# \u6309\u7167DES\u7b97\u6cd5\u7684\u6d41\u7a0b\u56fe\u8fdb\u884c\u8fd0\u7b97\ndef Encryption(text, key):\n keylist = cs.Subkey(keybit)\n text1 = f.IP(text, 0) #IP\u7f6e\u6362\n L = [text1[i] for i in range(32)]\n R = [text1[i] for i in range(32,64)]\n for i in range(16):\n tmp = R\n tmp = f.Extend(tmp)\n tmp = f.Xor(tmp, keylist[i])\n tmp = f.S_replace(tmp)\n tmp = f.P_replace(tmp)\n tmp = f.Xor(tmp, L)\n L = R\n R = tmp\n L,R = R,L\n ctext = L\n ctext.extend(R)\n ctext = f.IP(ctext, 1)\n return bin2Hex(ctext)\n\nif __name__ == '__main__':\n plaintext = input('\u8bf7\u8f93\u5165\u7528\u5341\u516d\u8fdb\u5236\u8868\u793a\u7684\u660e\u6587\uff1a') \n key = input('\u8bf7\u8f93\u5165\u7528\u5341\u516d\u8fdb\u5236\u8868\u793a\u7684\u5bc6\u94a5\uff1a')\n ptext = Hex2bin(plaintext)\n keybit = Hex2bin(key)\n print('\u8f93\u51fa\u7684\u5bc6\u6587\u4e3a\uff1a' + Encryption(ptext, keybit))\n<\/code><\/pre>\n\n\n\nimport CreateSubkey as cs\nimport F_function as f\n\n\n#\u5341\u516d\u8fdb\u5236\u8f6c\u4e8c\u8fdb\u5236\u6bd4\u7279\u4e32\ndef Hex2bin(text):\n result = []\n for i in range(len(text)):\n result.extend(f.int2bit(int(text[i],16)))\n return result\n#\u4e8c\u8fdb\u5236\u6bd4\u7279\u4e32\u8f6c\u5341\u516d\u8fdb\u5236\ndef bin2Hex(text):\n result = []\n q = len(text)\/\/4\n for i in range(q):\n dec = int(text[4*i])*8 + int(text[4*i+1])*4 + int(text[4*i+2])*2 + int(text[4*i+3])*1\n x = hex(dec)[2:].upper()\n result.extend(x)\n rs = ''.join(result)\n return rs\n\ndef Encryption(text, key):\n keylist = cs.Subkey(keybit)\n text1 = f.IP(text, 0) #IP\u7f6e\u6362\n L = [text1[i] for i in range(32)]\n R = [text1[i] for i in range(32,64)]\n for i in range(16):\n tmp = R\n tmp = f.Extend(tmp)\n tmp = f.Xor(tmp, keylist[15-i])\n tmp = f.S_replace(tmp)\n tmp = f.P_replace(tmp)\n tmp = f.Xor(tmp, L)\n L = R\n R = tmp\n L,R = R,L\n ctext = L\n ctext.extend(R)\n ctext = f.IP(ctext, 1)\n return bin2Hex(ctext)\n\nif __name__ == '__main__':\n plaintext = input('\u8bf7\u8f93\u5165\u7528\u5341\u516d\u8fdb\u5236\u8868\u793a\u7684\u5bc6\u6587\uff1a') \n key = input('\u8bf7\u8f93\u5165\u7528\u5341\u516d\u8fdb\u5236\u8868\u793a\u7684\u5bc6\u94a5\uff1a')\n ptext = Hex2bin(plaintext)\n keybit = Hex2bin(key)\n print('\u8f93\u51fa\u7684\u660e\u6587\u4e3a\uff1a' + Encryption(ptext, keybit))\n<\/code><\/pre>\n\n\n\n'''F-function\u6a21\u5757'''\n\nMaxTime = 16\n#IP\u7f6e\u6362\u8868\nIP_table=[58, 50, 42, 34, 26, 18, 10, 2,\n 60, 52, 44, 36, 28, 20, 12, 4,\n 62, 54, 46, 38, 30, 22, 14, 6,\n 64, 56, 48, 40, 32, 24, 16, 8,\n 57, 49, 41, 33, 25, 17, 9, 1,\n 59, 51, 43, 35, 27, 19, 11, 3,\n 61, 53, 45, 37, 29, 21, 13, 5,\n 63, 55, 47, 39, 31, 23, 15, 7 ]\n #\u9006IP\u7f6e\u6362\u8868\nInv_IP_table=[40, 8, 48, 16, 56, 24, 64, 32,\n 39, 7, 47, 15, 55, 23, 63, 31,\n 38, 6, 46, 14, 54, 22, 62, 30,\n 37, 5, 45, 13, 53, 21, 61, 29,\n 36, 4, 44, 12, 52, 20, 60, 28,\n 35, 3, 43, 11, 51, 19, 59, 27,\n 34, 2, 42, 10, 50, 18, 58, 26,\n 33, 1, 41, 9, 49, 17, 57, 25 ]\n#S\u76d2\u4e2d\u7684S1\u76d2\nS1=[14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,\n 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,\n 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,\n 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 ]\n#S\u76d2\u4e2d\u7684S2\u76d2\nS2=[15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,\n 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,\n 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,\n 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 ]\n#S\u76d2\u4e2d\u7684S3\u76d2\nS3=[10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,\n 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,\n 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,\n 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 ]\n#S\u76d2\u4e2d\u7684S4\u76d2\nS4=[ 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,\n 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,\n 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,\n 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 ]\n#S\u76d2\u4e2d\u7684S5\u76d2\nS5=[ 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,\n 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,\n 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,\n 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 ]\n #S\u76d2\u4e2d\u7684S6\u76d2\nS6=[12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,\n 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,\n 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,\n 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 ]\n#S\u76d2\u4e2d\u7684S7\u76d2\nS7=[ 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,\n 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,\n 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,\n 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12]\n#S\u76d2\u4e2d\u7684S8\u76d2\nS8=[13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,\n 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,\n 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,\n 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 ]\n# S\u76d2\nS=[S1,S2,S3,S4,S5,S6,S7,S8]\n#\u7528\u4e8e\u5bf9\u6570\u636e\u8fdb\u884c\u6269\u5c55\u7f6e\u6362\uff0c\u5c0632bit\u6570\u636e\u6269\u5c55\u4e3a48bit\nextend_table=[32, 1, 2, 3, 4, 5,\n 4, 5, 6, 7, 8, 9,\n 8, 9, 10, 11, 12, 13,\n 12, 13, 14, 15, 16, 17,\n 16, 17, 18, 19, 20, 21,\n 20, 21, 22, 23, 24, 25,\n 24, 25, 26, 27, 28, 29,\n 28, 29, 30, 31, 32, 1 ]\n#P\u76d2\nP_table=[ 16, 7, 20, 21, 29, 12, 28, 17,\n 1, 15, 23, 26, 5, 18, 31, 10,\n 2, 8, 24, 14, 32, 27, 3, 9,\n 19, 13, 30, 6, 22, 11, 4, 25 ]\n\ndef int2bit(n):#0~15\u6574\u6570\u8f6c\u6bd4\u7279\n a=[]\n for i in range(0,4):\n a.insert(0,str(n%2))\n n=int(n\/2)\n return a\n\n#IP\u7f6e\u6362\u90e8\u5206\uff0cop\u4e3a0\u8868\u793a\u6b63\u7f6e\u6362\uff0cop\u4e3a1\u8868\u793a\u9006\u7f6e\u6362\ndef IP(text, op): \n tmp = [0 for i in range(64)]\n if op == 0:\n for i in range(64):\n tmp[i] = text[IP_table[i]-1]\n return tmp\n if op == 1:\n for i in range(64):\n tmp[i] = text[Inv_IP_table[i]-1]\n return tmp\n#\u8fdb\u884c\u6269\u5c55\uff0c\u5c0632\u4f4d\u6269\u5c55\u4e3a48\u4f4d\ndef Extend(text):\n extend = [0 for i in range(48)]\n for i in range(48):\n extend[i] = text[extend_table[i] - 1]\n return extend\n\n#S\u76d2\u53d8\u6362\u90e8\u5206\ndef S_replace(text):\n Sresult = [0 for k in range(32)]\n for k in range(8):\n row = 2*int(text[k*6]) + int(text[k*6+5])\n column = 8*int(text[k*6+1]) + 4*int(text[k*6+2]) + 2*int(text[k*6+3]) + int(text[k*6+4])\n tmp = S[k][row*16+column]\n\n for i in range(4):\n Sresult[4*k + i] = int2bit(tmp)[i]\n return Sresult\n#P\u7f6e\u6362\u90e8\u5206\ndef P_replace(text):\n Presult = [0 for i in range(32)]\n for i in range(32):\n Presult[i] = text[P_table[i]-1]\n return Presult\n#\u5f02\u6216\u8fd0\u7b97\ndef Xor(bit1, bit2):\n Xorresult = [0 for i in range(len(bit1))]\n for i in range(len(bit1)):\n Xorresult[i] = str(int(bit1[i]) ^ int(bit2[i]))\n return Xorresult\n<\/code><\/pre>\n\n\n\n\u6bd4\u8f83\u61d2\uff0c\u5148\u5c31\u8fd9\u6837\u4e86<\/p>\n","protected":false},"excerpt":{"rendered":"
1\u3001\u7b80\u8ff0 1)\u3001\u8f93\u5165 64 \u4f4d\u660e\u6587\u6570\u636e\uff0c\u5e76\u8fdb\u884c\u521d\u59cb\u7f6e\u6362 IP\uff1b2)\u3001\u5728\u521d\u59cb\u7f6e\u6362 IP \u540e\uff0c\u660e\u6587\u6570\u636e\u518d\u88ab\u5206\u4e3a\u5de6\u53f3\u4e24\u90e8\u5206\uff0c\u6bcf\u90e8\u5206 32 \u4f4d\uff0c\u4ee5 L0\uff0cR0 \u8868\u793a\uff1b3)\u3001\u5728\u5bc6\u94a5\u7684\u63a7\u5236\u4e0b\uff0c\u7ecf\u8fc7 16 \u8f6e\u8fd0\u7b97(...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[25,21],"class_list":["post-493","post","type-post","status-publish","format-standard","hentry","category-7","tag-des","tag-21"],"_links":{"self":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts\/493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=493"}],"version-history":[{"count":1,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts\/493\/revisions"}],"predecessor-version":[{"id":573,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts\/493\/revisions\/573"}],"wp:attachment":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=493"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}