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https://github.com/MeoProject/lx-music-api-server.git
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239 lines
7.4 KiB
Python
239 lines
7.4 KiB
Python
# ----------------------------------------
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# - mode: python -
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# - author: helloplhm-qwq -
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# - name: kwdes.py -
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# - project: lx-music-api-server -
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# - license: MIT -
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# ----------------------------------------
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# This file is part of the "lx-music-api-server" project.
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# Do not edit except you know what you are doing.
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# KuwoDES加密实现，CV过来的，不进行注释
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# 下方为原文件版权声明，在此进行保留
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# Copyright (C) 2014 LiuLang <gsushzhsosgsu@gmail.com>
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# Use of this source code is governed by GPLv3 license that can be found
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# in http://www.gnu.org/licenses/gpl-3.0.html
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import base64
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DES_MODE_DECRYPT = 1
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arrayE = [
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31, 0, DES_MODE_DECRYPT, 2, 3, 4, -1, -1, 3, 4, 5, 6, 7, 8, -1, -1, 7, 8, 9, 10, 11, 12, -1, -1, 11, 12, 13, 14, 15, 16, -1, -
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1, 15, 16, 17, 18, 19, 20, -1, -1, 19, 20, 21, 22, 23, 24, -1, -
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1, 23, 24, 25, 26, 27, 28, -1, -1, 27, 28, 29, 30, 31, 30, -1, -1
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]
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arrayIP = [
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57, 49, 41, 33, 25, 17, 9, DES_MODE_DECRYPT, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7, 56, 48, 40, 32, 24, 16, 8, 0, 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22, 14, 6
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]
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arrayIP_1 = [
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39, 7, 47, 15, 55, 23, 63, 31, 38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29, 36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27, 34, 2, 42, 10, 50, 18, 58, 26, 33, DES_MODE_DECRYPT, 41, 9, 49, 17, 57, 25, 32, 0, 40, 8, 48, 16, 56, 24
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]
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arrayLs = [1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1]
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arrayLsMask = [0, 0x100001, 0x300003]
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arrayMask = [2 ** i for i in range(64)]
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arrayMask[-1] *= -1
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arrayP = [
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15, 6, 19, 20, 28, 11, 27, 16,
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0, 14, 22, 25, 4, 17, 30, 9,
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1, 7, 23, 13, 31, 26, 2, 8,
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18, 12, 29, 5, 21, 10, 3, 24,
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]
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arrayPC_1 = [
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56, 48, 40, 32, 24, 16, 8, 0,
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57, 49, 41, 33, 25, 17, 9, 1,
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58, 50, 42, 34, 26, 18, 10, 2,
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59, 51, 43, 35, 62, 54, 46, 38,
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30, 22, 14, 6, 61, 53, 45, 37,
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29, 21, 13, 5, 60, 52, 44, 36,
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28, 20, 12, 4, 27, 19, 11, 3,
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]
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arrayPC_2 = [
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13, 16, 10, 23, 0, 4, -1, -1,
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2, 27, 14, 5, 20, 9, -1, -1,
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22, 18, 11, 3, 25, 7, -1, -1,
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15, 6, 26, 19, 12, 1, -1, -1,
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40, 51, 30, 36, 46, 54, -1, -1,
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29, 39, 50, 44, 32, 47, -1, -1,
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43, 48, 38, 55, 33, 52, -1, -1,
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45, 41, 49, 35, 28, 31, -1, -1,
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]
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matrixNSBox = [[
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14, 4, 3, 15, 2, 13, 5, 3,
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13, 14, 6, 9, 11, 2, 0, 5,
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4, 1, 10, 12, 15, 6, 9, 10,
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1, 8, 12, 7, 8, 11, 7, 0,
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0, 15, 10, 5, 14, 4, 9, 10,
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7, 8, 12, 3, 13, 1, 3, 6,
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15, 12, 6, 11, 2, 9, 5, 0,
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4, 2, 11, 14, 1, 7, 8, 13, ], [
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15, 0, 9, 5, 6, 10, 12, 9,
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8, 7, 2, 12, 3, 13, 5, 2,
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1, 14, 7, 8, 11, 4, 0, 3,
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14, 11, 13, 6, 4, 1, 10, 15,
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3, 13, 12, 11, 15, 3, 6, 0,
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4, 10, 1, 7, 8, 4, 11, 14,
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13, 8, 0, 6, 2, 15, 9, 5,
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7, 1, 10, 12, 14, 2, 5, 9, ], [
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10, 13, 1, 11, 6, 8, 11, 5,
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9, 4, 12, 2, 15, 3, 2, 14,
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0, 6, 13, 1, 3, 15, 4, 10,
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14, 9, 7, 12, 5, 0, 8, 7,
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13, 1, 2, 4, 3, 6, 12, 11,
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0, 13, 5, 14, 6, 8, 15, 2,
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7, 10, 8, 15, 4, 9, 11, 5,
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9, 0, 14, 3, 10, 7, 1, 12, ], [
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7, 10, 1, 15, 0, 12, 11, 5,
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14, 9, 8, 3, 9, 7, 4, 8,
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13, 6, 2, 1, 6, 11, 12, 2,
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3, 0, 5, 14, 10, 13, 15, 4,
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13, 3, 4, 9, 6, 10, 1, 12,
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11, 0, 2, 5, 0, 13, 14, 2,
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8, 15, 7, 4, 15, 1, 10, 7,
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5, 6, 12, 11, 3, 8, 9, 14, ], [
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2, 4, 8, 15, 7, 10, 13, 6,
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4, 1, 3, 12, 11, 7, 14, 0,
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12, 2, 5, 9, 10, 13, 0, 3,
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1, 11, 15, 5, 6, 8, 9, 14,
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14, 11, 5, 6, 4, 1, 3, 10,
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2, 12, 15, 0, 13, 2, 8, 5,
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11, 8, 0, 15, 7, 14, 9, 4,
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12, 7, 10, 9, 1, 13, 6, 3, ], [
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12, 9, 0, 7, 9, 2, 14, 1,
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10, 15, 3, 4, 6, 12, 5, 11,
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1, 14, 13, 0, 2, 8, 7, 13,
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15, 5, 4, 10, 8, 3, 11, 6,
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10, 4, 6, 11, 7, 9, 0, 6,
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4, 2, 13, 1, 9, 15, 3, 8,
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15, 3, 1, 14, 12, 5, 11, 0,
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2, 12, 14, 7, 5, 10, 8, 13, ], [
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4, 1, 3, 10, 15, 12, 5, 0,
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2, 11, 9, 6, 8, 7, 6, 9,
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11, 4, 12, 15, 0, 3, 10, 5,
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14, 13, 7, 8, 13, 14, 1, 2,
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13, 6, 14, 9, 4, 1, 2, 14,
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11, 13, 5, 0, 1, 10, 8, 3,
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0, 11, 3, 5, 9, 4, 15, 2,
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7, 8, 12, 15, 10, 7, 6, 12, ], [
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13, 7, 10, 0, 6, 9, 5, 15,
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8, 4, 3, 10, 11, 14, 12, 5,
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2, 11, 9, 6, 15, 12, 0, 3,
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4, 1, 14, 13, 1, 2, 7, 8,
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1, 2, 12, 15, 10, 4, 0, 3,
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13, 14, 6, 9, 7, 8, 9, 6,
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15, 1, 5, 12, 3, 10, 14, 5,
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8, 7, 11, 0, 4, 13, 2, 11, ],
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]
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SECRET_KEY = b'ylzsxkwm'
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def bit_transform(arr_int, n, l):
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l2 = 0
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for i in range(n):
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if arr_int[i] < 0 or (l & arrayMask[arr_int[i]] == 0):
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continue
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l2 |= arrayMask[i]
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return l2
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def DES64(longs, l):
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out = 0
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SOut = 0
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pR = [0] * 8
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pSource = [0, 0]
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sbi = 0
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t = 0
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L = 0
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R = 0
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out = bit_transform(arrayIP, 64, l)
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pSource[0] = 0xFFFFFFFF & out
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pSource[1] = (-4294967296 & out) >> 32
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for i in range(16):
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R = pSource[1]
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R = bit_transform(arrayE, 64, R)
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R ^= longs[i]
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for j in range(8):
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pR[j] = 255 & R >> j * 8
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SOut = 0
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for sbi in range(7, -1, -1):
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SOut <<= 4
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SOut |= matrixNSBox[sbi][pR[sbi]]
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R = bit_transform(arrayP, 32, SOut)
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L = pSource[0]
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pSource[0] = pSource[1]
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pSource[1] = L ^ R
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pSource = pSource[::-1]
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out = -4294967296 & pSource[1] << 32 | 0xFFFFFFFF & pSource[0]
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out = bit_transform(arrayIP_1, 64, out)
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return out
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def sub_keys(l, longs, n):
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l2 = bit_transform(arrayPC_1, 56, l)
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for i in range(16):
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l2 = ((l2 & arrayLsMask[arrayLs[i]]) << 28 - arrayLs[i] | (l2 & ~arrayLsMask[arrayLs[i]]) >> arrayLs[i])
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longs[i] = bit_transform(arrayPC_2, 64, l2)
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j = 0
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while n == 1 and j < 8:
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l3 = longs[j]
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longs[j], longs[15-j] = longs[15-j], longs[j]
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j += 1
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def encrypt(msg, key=SECRET_KEY):
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if isinstance(msg, str):
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msg = msg.encode()
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if isinstance(key, str):
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key = key.encode()
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assert (isinstance(msg, bytes))
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assert (isinstance(key, bytes))
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# 处理密钥块
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l = 0
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for i in range(8):
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l = l | key[i] << i * 8
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j = len(msg) // 8
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# arrLong1 存放的是转换后的密钥块, 在解密时只需要把这个密钥块反转就行了
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arrLong1 = [0] * 16
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sub_keys(l, arrLong1, 0)
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# arrLong2 存放的是前部分的明文
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arrLong2 = [0] * j
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for m in range(j):
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for n in range(8):
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arrLong2[m] |= msg[n + m * 8] << n * 8
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# 用于存放密文
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arrLong3 = [0] * ((1 + 8 * (j + 1)) // 8)
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# 计算前部的数据块(除了最后一部分)
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for i1 in range(j):
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arrLong3[i1] = DES64(arrLong1, arrLong2[i1])
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# 保存多出来的字节
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arrByte1 = msg[j*8:]
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l2 = 0
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for i1 in range(len(msg) % 8):
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l2 |= arrByte1[i1] << i1 * 8
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# 计算多出的那一位(最后一位)
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arrLong3[j] = DES64(arrLong1, l2)
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# 将密文转为字节型
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arrByte2 = [0] * (8 * len(arrLong3))
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i4 = 0
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for l3 in arrLong3:
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for i6 in range(8):
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arrByte2[i4] = (255 & l3 >> i6 * 8)
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i4 += 1
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return arrByte2
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def base64_encrypt(msg):
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b1 = encrypt(msg)
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b2 = bytearray(b1)
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s = base64.encodebytes(b2)
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return s.replace(b'\n', b'').decode()
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