1 | #!/usr/bin/env python |
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2 | # |
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3 | # Python version of the jjdecode function written by Syed Zainudeen |
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4 | # http://csc.cs.utm.my/syed/images/files/jjdecode/jjdecode.html |
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5 | # |
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6 | # +NCR/CRC! [ReVeRsEr] - crackinglandia@gmail.com |
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7 | # Thanks to Jose Miguel Esparza (@EternalTodo) for the final push to make it work! |
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8 | # |
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9 | |
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10 | import re |
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11 | |
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12 | class JJDecoder(object): |
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13 | |
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14 | def __init__(self, jj_encoded_data): |
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15 | self.encoded_str = jj_encoded_data |
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16 | |
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17 | def clean(self): |
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18 | return re.sub('^\s+|\s+$', '', self.encoded_str) |
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19 | |
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20 | def checkPalindrome(self, Str): |
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21 | startpos = -1 |
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22 | endpos = -1 |
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23 | gv, gvl = -1, -1 |
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24 | |
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25 | index = Str.find('"\'\\"+\'+",') |
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26 | |
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27 | if index == 0: |
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28 | startpos = Str.find('$$+"\\""+') + 8 |
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29 | endpos = Str.find('"\\"")())()') |
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30 | gv = Str[Str.find('"\'\\"+\'+",') + 9:Str.find('=~[]')] |
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31 | gvl = len(gv) |
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32 | else: |
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33 | gv = Str[0:Str.find('=')] |
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34 | gvl = len(gv) |
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35 | startpos = Str.find('"\\""+') + 5 |
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36 | endpos = Str.find('"\\"")())()') |
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37 | |
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38 | return (startpos, endpos, gv, gvl) |
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39 | |
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40 | def decode(self): |
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41 | |
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42 | self.encoded_str = self.clean() |
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43 | startpos, endpos, gv, gvl = self.checkPalindrome(self.encoded_str) |
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44 | |
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45 | if startpos == endpos: |
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46 | raise Exception('No data!') |
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47 | |
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48 | data = self.encoded_str[startpos:endpos] |
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49 | |
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50 | b = ['___+', '__$+', '_$_+', '_$$+', '$__+', '$_$+', '$$_+', '$$$+', '$___+', '$__$+', '$_$_+', '$_$$+', '$$__+', '$$_$+', '$$$_+', '$$$$+'] |
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51 | |
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52 | str_l = '(![]+"")[' + gv + '._$_]+' |
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53 | str_o = gv + '._$+' |
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54 | str_t = gv + '.__+' |
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55 | str_u = gv + '._+' |
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56 | |
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57 | str_hex = gv + '.' |
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58 | |
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59 | str_s = '"' |
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60 | gvsig = gv + '.' |
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61 | |
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62 | str_quote = '\\\\\\"' |
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63 | str_slash = '\\\\\\\\' |
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64 | |
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65 | str_lower = '\\\\"+' |
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66 | str_upper = '\\\\"+' + gv + '._+' |
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67 | |
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68 | str_end = '"+' |
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69 | |
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70 | out = '' |
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71 | while data != '': |
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72 | # l o t u |
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73 | if data.find(str_l) == 0: |
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74 | data = data[len(str_l):] |
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75 | out += 'l' |
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76 | continue |
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77 | elif data.find(str_o) == 0: |
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78 | data = data[len(str_o):] |
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79 | out += 'o' |
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80 | continue |
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81 | elif data.find(str_t) == 0: |
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82 | data = data[len(str_t):] |
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83 | out += 't' |
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84 | continue |
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85 | elif data.find(str_u) == 0: |
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86 | data = data[len(str_u):] |
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87 | out += 'u' |
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88 | continue |
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89 | |
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90 | # 0123456789abcdef |
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91 | if data.find(str_hex) == 0: |
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92 | data = data[len(str_hex):] |
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93 | |
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94 | for i in range(len(b)): |
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95 | if data.find(b[i]) == 0: |
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96 | data = data[len(b[i]):] |
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97 | out += '%x' % i |
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98 | break |
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99 | continue |
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100 | |
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101 | # start of s block |
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102 | if data.find(str_s) == 0: |
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103 | data = data[len(str_s):] |
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104 | |
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105 | # check if "R |
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106 | if data.find(str_upper) == 0: # r4 n >= 128 |
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107 | data = data[len(str_upper):] # skip sig |
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108 | ch_str = '' |
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109 | for i in range(2): # shouldn't be more than 2 hex chars |
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110 | # gv + "."+b[ c ] |
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111 | if data.find(gvsig) == 0: |
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112 | data = data[len(gvsig):] |
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113 | for k in range(len(b)): # for every entry in b |
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114 | if data.find(b[k]) == 0: |
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115 | data = data[len(b[k]):] |
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116 | ch_str = '%x' % k |
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117 | break |
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118 | else: |
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119 | break |
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120 | |
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121 | out += chr(int(ch_str, 16)) |
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122 | continue |
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123 | |
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124 | elif data.find(str_lower) == 0: # r3 check if "R // n < 128 |
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125 | data = data[len(str_lower):] # skip sig |
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126 | |
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127 | ch_str = '' |
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128 | ch_lotux = '' |
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129 | temp = '' |
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130 | b_checkR1 = 0 |
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131 | for j in range(3): # shouldn't be more than 3 octal chars |
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132 | if j > 1: # lotu check |
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133 | if data.find(str_l) == 0: |
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134 | data = data[len(str_l):] |
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135 | ch_lotux = 'l' |
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136 | break |
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137 | elif data.find(str_o) == 0: |
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138 | data = data[len(str_o):] |
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139 | ch_lotux = 'o' |
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140 | break |
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141 | elif data.find(str_t) == 0: |
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142 | data = data[len(str_t):] |
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143 | ch_lotux = 't' |
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144 | break |
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145 | elif data.find(str_u) == 0: |
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146 | data = data[len(str_u):] |
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147 | ch_lotux = 'u' |
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148 | break |
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149 | |
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150 | # gv + "."+b[ c ] |
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151 | if data.find(gvsig) == 0: |
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152 | temp = data[len(gvsig):] |
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153 | for k in range(8): # for every entry in b octal |
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154 | if temp.find(b[k]) == 0: |
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155 | if int(ch_str + str(k), 8) > 128: |
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156 | b_checkR1 = 1 |
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157 | break |
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158 | |
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159 | ch_str += str(k) |
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160 | data = data[len(gvsig):] # skip gvsig |
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161 | data = data[len(b[k]):] |
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162 | break |
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163 | |
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164 | if b_checkR1 == 1: |
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165 | if data.find(str_hex) == 0: # 0123456789abcdef |
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166 | data = data[len(str_hex):] |
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167 | # check every element of hex decode string for a match |
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168 | for i in range(len(b)): |
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169 | if data.find(b[i]) == 0: |
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170 | data = data[len(b[i]):] |
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171 | ch_lotux = '%x' % i |
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172 | break |
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173 | break |
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174 | else: |
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175 | break |
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176 | |
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177 | out += chr(int(ch_str, 8)) + ch_lotux |
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178 | continue |
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179 | |
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180 | else: # "S ----> "SR or "S+ |
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181 | # if there is, loop s until R 0r + |
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182 | # if there is no matching s block, throw error |
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183 | |
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184 | match = 0 |
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185 | n = None |
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186 | |
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187 | # searching for matching pure s block |
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188 | while True: |
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189 | n = ord(data[0]) |
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190 | if data.find(str_quote) == 0: |
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191 | data = data[len(str_quote):] |
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192 | out += '"' |
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193 | match += 1 |
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194 | continue |
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195 | elif data.find(str_slash) == 0: |
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196 | data = data[len(str_slash):] |
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197 | out += '\\' |
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198 | match += 1 |
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199 | continue |
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200 | elif data.find(str_end) == 0: # reached end off S block ? + |
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201 | if match == 0: |
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202 | raise '+ no match S block: ' + data |
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203 | data = data[len(str_end):] |
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204 | break # step out of the while loop |
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205 | elif data.find(str_upper) == 0: # r4 reached end off S block ? - check if "R n >= 128 |
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206 | if match == 0: |
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207 | raise 'no match S block n>128: ' + data |
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208 | data = data[len(str_upper):] # skip sig |
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209 | |
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210 | ch_str = '' |
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211 | ch_lotux = '' |
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212 | |
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213 | for j in range(10): # shouldn't be more than 10 hex chars |
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214 | if j > 1: # lotu check |
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215 | if data.find(str_l) == 0: |
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216 | data = data[len(str_l):] |
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217 | ch_lotux = 'l' |
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218 | break |
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219 | elif data.find(str_o) == 0: |
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220 | data = data[len(str_o):] |
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221 | ch_lotux = 'o' |
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222 | break |
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223 | elif data.find(str_t) == 0: |
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224 | data = data[len(str_t):] |
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225 | ch_lotux = 't' |
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226 | break |
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227 | elif data.find(str_u) == 0: |
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228 | data = data[len(str_u):] |
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229 | ch_lotux = 'u' |
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230 | break |
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231 | |
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232 | # gv + "."+b[ c ] |
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233 | if data.find(gvsig) == 0: |
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234 | data = data[len(gvsig):] # skip gvsig |
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235 | for k in range(len(b)): # for every entry in b |
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236 | if data.find(b[k]) == 0: |
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237 | data = data[len(b[k]):] |
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238 | ch_str += '%x' % k |
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239 | break |
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240 | else: |
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241 | break # done |
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242 | out += chr(int(ch_str, 16)) |
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243 | break # step out of the while loop |
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244 | elif data.find(str_lower) == 0: # r3 check if "R // n < 128 |
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245 | if match == 0: |
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246 | raise 'no match S block n<128: ' + data |
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247 | |
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248 | data = data[len(str_lower):] # skip sig |
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249 | |
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250 | ch_str = '' |
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251 | ch_lotux = '' |
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252 | temp = '' |
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253 | b_checkR1 = 0 |
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254 | |
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255 | for j in range(3): # shouldn't be more than 3 octal chars |
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256 | if j > 1: # lotu check |
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257 | if data.find(str_l) == 0: |
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258 | data = data[len(str_l):] |
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259 | ch_lotux = 'l' |
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260 | break |
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261 | elif data.find(str_o) == 0: |
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262 | data = data[len(str_o):] |
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263 | ch_lotux = 'o' |
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264 | break |
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265 | elif data.find(str_t) == 0: |
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266 | data = data[len(str_t):] |
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267 | ch_lotux = 't' |
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268 | break |
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269 | elif data.find(str_u) == 0: |
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270 | data = data[len(str_u):] |
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271 | ch_lotux = 'u' |
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272 | break |
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273 | |
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274 | # gv + "."+b[ c ] |
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275 | if data.find(gvsig) == 0: |
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276 | temp = data[len(gvsig):] |
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277 | for k in range(8): # for every entry in b octal |
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278 | if temp.find(b[k]) == 0: |
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279 | if int(ch_str + str(k), 8) > 128: |
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280 | b_checkR1 = 1 |
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281 | break |
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282 | |
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283 | ch_str += str(k) |
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284 | data = data[len(gvsig):] # skip gvsig |
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285 | data = data[len(b[k]):] |
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286 | break |
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287 | |
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288 | if b_checkR1 == 1: |
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289 | if data.find(str_hex) == 0: # 0123456789abcdef |
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290 | data = data[len(str_hex):] |
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291 | # check every element of hex decode string for a match |
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292 | for i in range(len(b)): |
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293 | if data.find(b[i]) == 0: |
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294 | data = data[len(b[i]):] |
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295 | ch_lotux = '%x' % i |
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296 | break |
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297 | else: |
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298 | break |
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299 | out += chr(int(ch_str, 8)) + ch_lotux |
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300 | break # step out of the while loop |
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301 | elif (0x21 <= n and n <= 0x2f) or (0x3A <= n and n <= 0x40) or (0x5b <= n and n <= 0x60) or (0x7b <= n and n <= 0x7f): |
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302 | out += data[0] |
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303 | data = data[1:] |
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304 | match += 1 |
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305 | continue |
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306 | print 'No match : ' + data |
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307 | break |
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308 | return out |
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