git.zerfleddert.de Git - proxmark3-svn/blob

1 --[[

2 This may be moved to a separate library at some point (Holiman)

3 --]]

4 local Utils =

5 {

6 -- Asks the user for Yes or No

7 confirm = function(message, ...)

8 local answer

9 message = message .. " [y/n] ?"

10 repeat

11 io.write(message)

12 io.flush()

13 answer=io.read()

14 if answer == 'Y' or answer == "y" then

15 return true

16 elseif answer == 'N' or answer == 'n' then

17 return false

18 end

19 until false

20 end,

21 ---

22 -- Asks the user for input

23 input = function (message , default)

24 local answer

25 if default ~= nil then

26 message = message .. " (default: ".. default.. " )"

27 end

28 message = message .." \n > "

29 io.write(message)

30 io.flush()

31 answer=io.read()

32 if answer == '' then answer = default end

34 return answer

35 end,

37 ------------ FILE READING

38 ReadDumpFile = function (filename)

40 if filename == nil then

41 return nil, 'Filename is empty'

42 end

43 if #filename == 0 then

44 return nil, 'Filename length is zero'

45 end

47 infile = io.open(filename, "rb")

48 if infile == nil then

49 return nil, string.format("Could not read file %s",filename)

50 end

51 local t = infile:read("*all")

52 len = string.len(t)

53 local _,hex = bin.unpack(("H%d"):format(len),t)

54 io.close(infile)

55 return hex

56 end,

58 ------------ string split function

59 Split = function( inSplitPattern, outResults )

60 if not outResults then

61 outResults = {}

62 end

63 local start = 1

64 local splitStart, splitEnd = string.find( self, inSplitPattern, start )

65 while splitStart do

66 table.insert( outResults, string.sub( self, start, splitStart-1 ) )

67 start = splitEnd + 1

68 splitStart, splitEnd = string.find( self, inSplitPattern, start )

69 end

70 table.insert( outResults, string.sub( self, start ) )

71 return outResults

72 end,

75 ------------ CRC-16 ccitt checksums

76 -- Takes a hex string and calculates a crc16

77 Crc16 = function(s)

78 if s == nil then return nil end

79 if #s == 0 then return nil end

80 if type(s) == 'string' then

81 local utils = require('utils')

82 local asc = utils.ConvertHexToAscii(s)

83 local hash = core.crc16(asc)

84 return hash

85 end

86 return nil

87 end,

89 ------------ CRC-64 ecma checksums

90 -- Takes a hex string and calculates a crc64 ecma

91 Crc64 = function(s)

92 if s == nil then return nil end

93 if #s == 0 then return nil end

94 if type(s) == 'string' then

95 local utils = require('utils')

96 local asc = utils.ConvertHexToAscii(s)

97 local hash = core.crc64(asc)

98 return hash

99 end

100 return nil

101 end,

102

103 ------------ SHA1 hash

104 -- Takes a string and calculates a SHA1 hash

105 Sha1 = function(s)

106 if s == nil then return nil end

107 if #s == 0 then return nil end

108 if type(s) == 'string' then

109 local utils = require('utils')

110 --local asc = utils.ConvertHexToAscii(s)

111 local hash = core.sha1(s)

112 return hash

113 end

114 return nil

115 end,

116 -- Takes a hex string and calculates a SHA1 hash

117 Sha1Hex = function(s)

118 if s == nil then return nil end

119 if #s == 0 then return nil end

120 if type(s) == 'string' then

121 local utils = require('utils')

122 local asc = utils.ConvertHexToAscii(s)

123 local hash = core.sha1(asc)

124 return hash

125 end

126 return nil

127 end,

128

129

130 -- input parameter is a string

131 -- Swaps the endianess and returns a number,

132 -- IE: 'cd7a' -> '7acd' -> 0x7acd

133 SwapEndianness = function(s, len)

134 if s == nil then return nil end

135 if #s == 0 then return '' end

136 if type(s) ~= 'string' then return nil end

137

138 local retval = 0

139 if len == 16 then

140 local t = s:sub(3,4)..s:sub(1,2)

141 retval = tonumber(t,16)

142 elseif len == 24 then

143 local t = s:sub(5,6)..s:sub(3,4)..s:sub(1,2)

144 retval = tonumber(t,16)

145 elseif len == 32 then

146 local t = s:sub(7,8)..s:sub(5,6)..s:sub(3,4)..s:sub(1,2)

147 retval = tonumber(t,16)

148 end

149 return retval

150 end,

151

152 -- input parameter is a string

153 -- Swaps the endianess and returns a string,

154 -- IE: 'cd7a' -> '7acd' -> 0x7acd

155 SwapEndiannessStr = function(s, len)

156 if s == nil then return nil end

157 if #s == 0 then return '' end

158 if type(s) ~= 'string' then return nil end

159

160 local retval

161 if len == 16 then

162 retval = s:sub(3,4)..s:sub(1,2)

163 elseif len == 24 then

164 retval = s:sub(5,6)..s:sub(3,4)..s:sub(1,2)

165 elseif len == 32 then

166 retval = s:sub(7,8)..s:sub(5,6)..s:sub(3,4)..s:sub(1,2)

167 end

168 return retval

169 end,

170 ------------ CONVERSIONS

171

172 --

173 -- Converts DECIMAL to HEX

174 ConvertDecToHex = function(IN)

175 local B,K,OUT,I,D=16,"0123456789ABCDEF","",0

176 while IN>0 do

177 I=I+1

178 IN , D = math.floor(IN/B), math.modf(IN,B)+1

179 OUT = string.sub(K,D,D)..OUT

180 end

181 return OUT

182 end,

183 ---

184 -- Convert Byte array to string of hex

185 ConvertBytesToHex = function(bytes)

186 if #bytes == 0 then

187 return ''

188 end

189 local s={}

190 for i = 1, #(bytes) do

191 s[i] = string.format("%02X",bytes[i])

192 end

193 return table.concat(s)

194 end,

195 -- Convert byte array to string with ascii

196 ConvertBytesToAscii = function(bytes)

197 if #bytes == 0 then

198 return ''

199 end

200 local s={}

201 for i = 1, #(bytes) do

202 s[i] = string.char(bytes[i])

203 end

204 return table.concat(s)

205 end,

206 ConvertHexToBytes = function(s)

207 local t={}

208 if s == nil then return t end

209 if #s == 0 then return t end

210 for k in s:gmatch"(%x%x)" do

211 table.insert(t,tonumber(k,16))

212 end

213 return t

214 end,

215 ConvertAsciiToBytes = function(s, reverse)

216 local t = {}

217 if s == nil then return t end

218 if #s == 0 then return t end

219

220 for k in s:gmatch"(.)" do

221 table.insert(t, string.byte(k))

222 end

223

224 if not reverse then

225 return t

226 end

227

228 local rev = {}

229 if reverse then

230 for i = #t, 1,-1 do

231 table.insert(rev, t[i] )

232 end

233 end

234 return rev

235 end,

236

237 ConvertHexToAscii = function(s)

238 local t={}

239 if s == nil then return t end

240 if #s == 0 then return t end

241 for k in s:gmatch"(%x%x)" do

242 table.insert(t, string.char(tonumber(k,16)))

243 end

244 return table.concat(t)

245 end,

246

247 Chars2num = function(s)

248 return (s:byte(1)*16777216)+(s:byte(2)*65536)+(s:byte(3)*256)+(s:byte(4))

249 end,

250

251 -- use length of string to determine 8,16,32,64 bits

252 bytes_to_int = function(str,endian,signed)

253 local t={str:byte(1,-1)}

254 if endian=="big" then --reverse bytes

255 local tt={}

256 for k=1,#t do

257 tt[#t-k+1]=t[k]

258 end

259 t=tt

260 end

261 local n=0

262 for k=1,#t do

263 n=n+t[k]*2^((k-1)*8)

264 end

265 if signed then

266 n = (n > 2^(#t*8-1) -1) and (n - 2^(#t*8)) or n -- if last bit set, negative.

267 end

268 return n

269 end,

270

271 -- function convertStringToBytes(str)

272 -- local bytes = {}

273 -- local strLength = string.len(str)

274 -- for i=1,strLength do

275 -- table.insert(bytes, string.byte(str, i))

276 -- end

277

278 -- return bytes

279 -- end

280

281 -- function convertBytesToString(bytes)

282 -- local bytesLength = table.getn(bytes)

283 -- local str = ""

284 -- for i=1,bytesLength do

285 -- str = str .. string.char(bytes[i])

286 -- end

287

288 -- return str

289 -- end

290

291 -- function convertHexStringToBytes(str)

292 -- local bytes = {}

293 -- local strLength = string.len(str)

294 -- for k=2,strLength,2 do

295 -- local hexString = "0x" .. string.sub(str, (k - 1), k)

296 -- table.insert(bytes, hex.to_dec(hexString))

297 -- end

298

299 -- return bytes

300 -- end

301

302 -- function convertBytesToHexString(bytes)

303 -- local str = ""

304 -- local bytesLength = table.getn(bytes)

305 -- for i=1,bytesLength do

306 -- local hexString = string.sub(hex.to_hex(bytes[i]), 3)

307 -- if string.len(hexString) == 1 then

308 -- hexString = "0" .. hexString

309 -- end

310 -- str = str .. hexString

311 -- end

312

313 -- return str

314 -- end

315

316 }

317 return Utils