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vincascm/idcard_check.lua

Last active August 29, 2015 14:02
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Revisions

  1. vincascm revised this gist Jun 13, 2014. 1 changed file with 10 additions and 7 deletions.
    17 changes: 10 additions & 7 deletions idcard_check.lua
    View file
    Original file line number Diff line number Diff line change
    @@ -1,7 +1,7 @@


    function check (id)
    local error_code = { "ID card number is invalid.", "birthday is invalid.", "check code is invalid." }
    local error_code = { "The length of ID card number is not 18.", "ID card number is invalid.",
    "birthday is invalid.", "check code is invalid." }
    local month_day = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
    local weight = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 }
    local check_code = { "1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2" }
    @@ -11,23 +11,28 @@ function check (id)

    local sum = 0

    -- verify length
    if string.len(id) ~= 18 then
    return error_code[1]
    end

    -- verify sign
    if not(tonumber(string.sub(id,1,6)) and year and month and day and string.match(string.sub(id,18), "[%dXx]")) then
    return error_code[1]
    return error_code[2]
    end

    -- verify birthday
    if (year % 4 == 0 and year % 100 ~= 0) or year % 400 == 0 then month_day[2] = month_day[2] + 1 end
    if not ( year < 4000 and year > 1800 and month <= 12 and month > 0 and day <= month_day[month] and day > 0) then
    return error_code[2]
    return error_code[3]
    end

    -- verify last bit which is check code
    for k, v in ipairs(weight) do
    sum = sum + string.sub(id,k,k) * v
    end
    if string.upper(string.sub(id, 18)) ~= check_code[sum % 11 + 1] then
    return error_code[3]
    return error_code[4]
    end

    return false
    @@ -38,5 +43,3 @@ info = check("123456199001023824")
    if info then
    print(info)
    end


  2. vincascm created this gist Jun 12, 2014.
    42 changes: 42 additions & 0 deletions idcard_check.lua
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,42 @@


    function check (id)
    local error_code = { "ID card number is invalid.", "birthday is invalid.", "check code is invalid." }
    local month_day = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
    local weight = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 }
    local check_code = { "1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2" }
    local year = tonumber(string.sub(id, 7, 10))
    local month = tonumber(string.sub(id, 11, 12))
    local day = tonumber(string.sub(id, 13, 14))

    local sum = 0

    -- verify sign
    if not(tonumber(string.sub(id,1,6)) and year and month and day and string.match(string.sub(id,18), "[%dXx]")) then
    return error_code[1]
    end

    -- verify birthday
    if (year % 4 == 0 and year % 100 ~= 0) or year % 400 == 0 then month_day[2] = month_day[2] + 1 end
    if not ( year < 4000 and year > 1800 and month <= 12 and month > 0 and day <= month_day[month] and day > 0) then
    return error_code[2]
    end

    -- verify last bit which is check code
    for k, v in ipairs(weight) do
    sum = sum + string.sub(id,k,k) * v
    end
    if string.upper(string.sub(id, 18)) ~= check_code[sum % 11 + 1] then
    return error_code[3]
    end

    return false
    end

    info = check("123456199001023824")

    if info then
    print(info)
    end