anatolykopyl/know-own-checksum
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crc32 is a number

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Anatoly Kopyl
2021-10-30 21:33:28 +03:00
parent 54f368e205
commit d3b23d2f89
3 changed files with 10 additions and 10 deletions
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2
brute_crc32.lua
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@@ -21,7 +21,7 @@ local attempts = 0
repeat repeat
local random_crc32 = crc32.hash(attempts) local random_crc32 = crc32.hash(attempts)
edit_file('i_know_my_crc32.lua', 13, "local crc32_expected = '" .. random_crc32 .. "'") edit_file('i_know_my_crc32.lua', 13, "local crc32_expected = " .. random_crc32)
local match = require('i_know_my_crc32') local match = require('i_know_my_crc32')
attempts = attempts + 1 attempts = attempts + 1
print(attempts) print(attempts)

10
i_know_my_crc32.lua
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@@ -2,15 +2,15 @@ local crc32 = require 'crc32'
local this_file = 'i_know_my_crc32.lua' local this_file = 'i_know_my_crc32.lua'
function read_all(file) function read_all(file)
local f = assert(io.open(file, "rb")) local f = assert(io.open(file, "rb"))
local content = f:read("*all") local content = f:read("*all")
f:close() f:close()
return content return content
end end
local content = read_all(this_file) local content = read_all(this_file)
local crc32_result = crc32.hash(content) local crc32_result = crc32.hash(content)
local crc32_expected = '' local crc32_expected = 000000000
print('My expected crc32 checksum is ' .. crc32_expected) print('My expected crc32 checksum is ' .. crc32_expected)
print('My own crc32 checksum is ' .. crc32_result) print('My own crc32 checksum is ' .. crc32_result)

8
i_know_my_md5.lua
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@@ -2,10 +2,10 @@ local md5 = require 'md5'
local this_file = 'i_know_my_md5.lua' local this_file = 'i_know_my_md5.lua'
function read_all(file) function read_all(file)
local f = assert(io.open(file, "rb")) local f = assert(io.open(file, "rb"))
local content = f:read("*all") local content = f:read("*all")
f:close() f:close()
return content return content
end end
local content = read_all(this_file) local content = read_all(this_file)