HomeSYNOPSIS
v4kf.emvDecode(data[, human])
DESCRIPTION
Decodes data, which must be TLV encoded according to ISO7816-4, into a Lua table.
If human is 0 or nil, the table is structured in machine readable form. It contains key/value pairs containing the tags and data of the decoded data. Nested tags are represented by nested tables.
If human is 1, the table contains a numbered list, formatted in a human readable way. Each TLV object in the source data is represented by a nested table that contains the fields tag (The tag, hex formatted with leading 0x), data (The data contents: a string or a nested table for nested tags), name (A textual description of the tag, from the EMV standard) and, in some cases, text (A human readable representation of data).
RETURN VALUE
Returns a table.
EXAMPLE
>
>
data = string.fromhex("6F1A840E315041592E5359532E4444463031A5088801025F2D02656E")
print(table.tostring(v4kf.emvDecode(data),1))
{
[111] = {
[132] = "1PAY.SYS.DDF01",
[165] = {
[136] = "\x02",
[24365] = "en"
}
}
}
>
print(table.tostring(v4kf.emvDecode(data,1),1))
{
{
name = "File Control Information (FCI) Template",
tag = "0x6F",
data = {
{
name = "Dedicated File (DF) Name",
text = "315041592E5359532E4444463031",
tag = "0x84",
data = "1PAY.SYS.DDF01"
},
{
name = "File Control Information (FCI) Proprietary Template",
tag = "0xA5",
data = {
{
name = "Short File Identifier (SFI)",
tag = "0x88",
data = "\x02"
},
{
name = "Language Preference",
tag = "0x5F2D",
data = "en"
}
}
}
}
}
}