des加密算法實驗報告-在線瀏覽
2025-07-16 22:01本頁面
【正文】 // S_Box[3] { 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 }, { 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1 }, { 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7 }, { 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 } }, { // S_Box[4] { 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 }, { 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9 }, { 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4 }, { 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 } }, { // S_Box[5] { 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 }, { 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6 }, { 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14 }, { 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 } }, { // S_Box[6] { 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 }, { 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8 }, { 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6 }, { 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 } }, { // S_Box[7] { 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 }, { 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6 }, { 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2 }, { 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 } }, { // S_Box[8] { 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 }, { 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2 }, { 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8 }, { 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 } } }。 // 左移位置列表 private byte[] UnitDes(byte[] des_key, byte[] des_data, int flag) { // 檢測輸入?yún)?shù)格式是否正確，錯誤直接返回空值（null） if (( != 8) || ( != 8)|| ((flag != 1) amp。 (flag != 0))) { throw new RuntimeException(Data Format Error !)。// 二進(jìn)制加密密鑰 int[] keydata = new int[64]。 // 加密操作完成后的字節(jié)數(shù)組 byte[] EncryptCode = new byte[8]。// 將密鑰字節(jié)數(shù)組轉(zhuǎn)換成二進(jìn)制字節(jié)數(shù)組 keydata = ReadDataToBirnaryIntArray(des_key)。// 初試化密鑰為二維密鑰數(shù)組 KeyInitialize(keydata, KeyArray)。 return EncryptCode。 int j。// 特別注意：xxx[IP[i]1]等類似變換 for (i = 0。 i++) { K0[i] = key[PC_1[i] 1]。 i 16。 // 特別注意：xxx[IP[i]1]等類似變換 for (j = 0。 j++) { keyarray[i][j] = K0[PC_2[j] 1]。 byte[] encrypt = new byte[8]。 int[] M = new int[64]。 // 特別注意：xxx[IP[i]1]等類似變換 for (i = 0。 i++) { M[i] = timeData[IP[i] 1]。 i 16。 } } else if (flags == 0) { // 解密 for (i = 15。 i) { LoopF(M, i, flags, keyarray)。 i 64。 // 進(jìn)行IP1運(yùn)算 } GetEncryptResultOfByteArray(MIP_1, encrypt)。 } private int[] ReadDataToBirnaryInt
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