本文介绍了如何在C中创建APDU(TLV)解析器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
例如，我有这样的R-APDU
For example I have R-APDU like this
uchar rApdu[] = {0x6F, 0x35 ,0x84 ,0x08 ,0x45 ,0x4F ,0x50 ,
0x43 ,0x43 ,0x41 ,0x52 ,0x44 ,0xA5 ,0x29 ,0x50 ,0x06 ,0x55 ,0x5A ,0x4B ,0x41 ,0x52 ,0x54 ,0x5F,
0x2D, 0x06 ,0x75 ,0x7A ,0x72 ,0x75 ,0x65 ,0x6E ,0x87 ,0x01 ,0x01 ,0x9F ,0x11 ,0x01 ,0x01 ,0x9F,
0x12 ,0x06 ,0x55 ,0x5A ,0x4B ,0x41 ,0x52 ,0x54 ,0xBF ,0x0C ,0x05 ,0x9F ,0x4D ,0x02 ,0x0B ,0x0A};
我想用C解析此TLV，例如在此页面上:已解析的TLV
I want to parse this TLV in C, like on this page: parsed TLV
它应该解析所有标签及其值，并采用结构.我试图解析，这就是我得到的:
It should parse all tags and their value and take in structure.I tried to parse and that's what I got:
#include <stdio.h>
#include <stdlib.h>
#define uchar unsigned char
#define uint unsigned int
#define ushort unsigned short
#define k6f 0x6F
typedef enum{
false,
true
}bool;
struct TAG{
uchar *data;
uint len;
};
struct TLVdata{
struct TAG s6F;
struct TAG s84;
struct TAG sA5;
struct TAG s50;
struct TAG s5F2D;
struct TAG s87;
struct TAG s9F11;
struct TAG s9F12;
struct TAG sBF0C;
struct TAG s9F4D;
};
static int readTLV(uchar rApdu[]);
int main(void){
uchar rApdu[] = {0x6F, 0x35 ,0x84 ,0x08 ,0x45 ,0x4F ,0x50 ,
0x43 ,0x43 ,0x41 ,0x52 ,0x44 ,0xA5 ,0x29 ,0x50 ,0x06 ,0x55 ,0x5A ,0x4B ,0x41 ,0x52 ,0x54 ,0x5F,
0x2D, 0x06 ,0x75 ,0x7A ,0x72 ,0x75 ,0x65 ,0x6E ,0x87 ,0x01 ,0x01 ,0x9F ,0x11 ,0x01 ,0x01 ,0x9F,
0x12 ,0x06 ,0x55 ,0x5A ,0x4B ,0x41 ,0x52 ,0x54 ,0xBF ,0x0C ,0x05 ,0x9F ,0x4D ,0x02 ,0x0B ,0x0A};
if (readTLV(rApdu) == 0)
printf("ok!\n");
system("PAUSE");
return false;
}
static int readTLV(uchar rApdu[]){
uint i, j, aLen, tLen, tlvIndex;
struct TLVdata newtlv;
aLen = sizeof(rApdu);
tlvIndex = 0;
switch(rApdu[tlvIndex]){
case k6f:
tLen = (int)rApdu[++tlvIndex];
for(i=0; i <= tLen; i++, ++tlvIndex){
if(rApdu[tlvIndex] == 0x84){
newtlv.s84.len = (int)rApdu[++tlvIndex];
++tlvIndex;
newtlv.s84.data = (char*)malloc(10*sizeof(char));
for(j=0; j < newtlv.s84.len; j++, ++tlvIndex){
newtlv.s84.data[j] = rApdu[tlvIndex];
}
newtlv.s84.data[j] = '\0';
printf("%s\n", newtlv.s84.data);
}
}
break;
}
return 0;
}
我找到了一个解析器.只有它是用Java编写的，或者不知道用哪种语言.有人可以帮忙吗? apduparser
I found one parser. Only it is written in Java or do not know in what language. Can someone help?apduparser
推荐答案
要实施EMV TLV数据解析，您需要遵循 ISO 8825-1 BER-TLV 编码规则，也称为 ASN.1基本编码规则(BER).
To implement EMV TLV data parsing you need to follow ISO 8825-1 BER-TLV encoding rules, also known as ASN.1 Basic Encoding Rules (BER).
简而言之，要提取正确的BER-TLV 值，您需要分析 Tag 和 Length 位以获得正确的大小.
To be short, to extract correct BER-TLV Value you need analyse Tag and Length bits to get its correct size.
然后您的样本缓冲区将如下所示:
Then your sample buffer will be like this:
tag: "6F"
len: "35" # // 53
val:#"8408454F504343415244A5295006555A4B4152545F2D06757A7275656E87..0B0A"
- x84:#"8408454F504343415244"
- tag: "84"
- len: "08" # // 8
- val: "454F504343415244"
- xA5:#"A5295006555A4B4152545F2D06757A7275656E8701019F1101019F120655..0B0A"
- tag: "A5"
- len: "29" # // 41
- val:#"5006555A4B4152545F2D06757A7275656E8701019F1101019F1206555A4B..0B0A"
- x50:#"5006555A4B415254"
- tag: "50"
- len: "06" # // 6
- val: "555A4B415254"
- x5F2D:#"5F2D06757A7275656E"
- tag: "5F2D"
- len: "06" # // 6
- val: "757A7275656E"
- x87:#"870101"
- tag: "87"
- len: "01" # // 1
- val: "01"
- x9F11:#"9F110101"
- tag: "9F11"
- len: "01" # // 1
- val: "01"
- x9F12:#"9F1206555A4B415254"
- tag: "9F12"
- len: "06" # // 6
- val: "555A4B415254"
- xBF0C:#"BF0C059F4D020B0A"
- tag: "BF0C"
- len: "05" # // 5
- val:#"9F4D020B0A"
- x9F4D:#"9F4D020B0A"
- tag: "9F4D"
- len: "02" # // 2
- val: "0B0A"
或者，如果您希望应用EMV分析:
Or, in case you wish to apply EMV analysis:
# Cheef's parser.
# lib : "/lib/EMV/" - EMV - Integrated Circuit Card Specifications for Payment Systems
# node : "TLVs"
TLVs:#"6F358408454F504343415244A5295006555A4B4152545F2D06757A727565..0B0A" # EMV, Tag + Length + Value (TLV) series
- x6F:#"6F358408454F504343415244A5295006555A4B4152545F2D06757A727565..0B0A" # ISO 7816, Template, File Control Parameters and File Management Data (FCI)
- tag: "6F"
- len: "35" # // 53
- val:#"8408454F504343415244A5295006555A4B4152545F2D06757A7275656E87..0B0A"
- x84:#"8408454F504343415244" # EMV, Dedicated File (DF) Name
- tag: "84"
- len: "08" # // 8
- val:#"454F504343415244" # Dedicated File (DF) Name.
- RID: "454F504343" # Registered Application Provider Identifier (RID)
- PIX: "415244" # Proprietary Application Identifier Extension (PIX)
- xA5:#"A5295006555A4B4152545F2D06757A7275656E8701019F1101019F120655..0B0A" # EMV, Template, FCI A5
- tag: "A5"
- len: "29" # // 41
- val:#"5006555A4B4152545F2D06757A7275656E8701019F1101019F1206555A4B..0B0A"
- x50:#"5006555A4B415254" # ISO 7816, Application Label
- tag: "50"
- len: "06" # // 6
- val: "555A4B415254" # Application Label. // UZKART
- x5F2D:#"5F2D06757A7275656E" # ISO 7816, Language Preference
- tag: "5F2D"
- len: "06" # // 6
- val:#"757A7275656E" # Language Preference. // uzruen
- A21: "uz" # ISO 639, Language Code (a2) // Uzbek
- A22: "ru" # ISO 639, Language Code (a2) // Russian
- A23: "en" # ISO 639, Language Code (a2) // English
- x87:#"870101" # EMV, Application Priority Indicator
- tag: "87"
- len: "01" # // 1
- val:#"01" # Application Priority Indicator.
- S01: "0" # // Application may be selected without confirmation of cardholder
- S02: "1" # // No priority assigned
- x9F11:#"9F110101" # EMV, Issuer Code Table Index
- tag: "9F11"
- len: "01" # // 1
- val: "01" # Issuer Code Table Index. // ISO 8859, Part 1
- x9F12:#"9F1206555A4B415254" # EMV, Application Preferred Name
- tag: "9F12"
- len: "06" # // 6
- val: "555A4B415254" # Name, Application Preferred. // UZKART
- xBF0C:#"BF0C059F4D020B0A" # EMV, FCI Issuer Discretionary Data
- tag: "BF0C"
- len: "05" # // 5
- val:#"9F4D020B0A" # FCI Issuer Discretionary Data.
- x9F4D:#"9F4D020B0A" # EMV, Log Entry
- tag: "9F4D"
- len: "02" # // 2
- val:#"0B0A" # Log Entry.
- B01: "0B" # SFI containing the cyclic transaction log file (binary) // 11
- B02: "0A" # Maximum number of records in the transaction log file (binary) // 10
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