TLV decoding works
authormerlokk <olegmsn@gmail.com>
Wed, 1 Nov 2017 11:38:29 +0000 (13:38 +0200)
committermerlokk <olegmsn@gmail.com>
Wed, 1 Nov 2017 11:38:29 +0000 (13:38 +0200)
client/Makefile
client/cmdhf14a.c
client/cmdhf14a.h
client/emv/dump.c [new file with mode: 0644]
client/emv/dump.h [new file with mode: 0644]
client/emv/emv_tags.c [new file with mode: 0644]
client/emv/emv_tags.h [new file with mode: 0644]
client/emv/emvcore.c [new file with mode: 0644]
client/emv/emvcore.h [new file with mode: 0644]
client/emv/tlv.c [new file with mode: 0644]
client/emv/tlv.h [new file with mode: 0644]

index 8e1574d4558a390e68385edfb0099b02cc9fdd27..30e91efb4c316e0350c6c885211843115275d490 100644 (file)
@@ -108,6 +108,10 @@ CMDSRCS =  crapto1/crapto1.c\
                        cmddata.c \
                        lfdemod.c \
                        emv/apduinfo.c\
+                       emv/dump.c\
+                       emv/tlv.c\
+                       emv/emv_tags.c\
+                       emv/emvcore.c\
                        cmdhf.c \
                        cmdhf14a.c \
                        cmdhf14b.c \
index aebe246335dc8c4ce177031daebb7fe364dd0605..1a7f6970db214a2c39b5a640fa15e2de934532c1 100644 (file)
@@ -688,8 +688,8 @@ int CmdHF14AAPDU(const char *cmd) {
        PrintAndLog("APDU response: %02x %02x - %s", data[datalen - 2], data[datalen - 1], GetAPDUCodeDescription(data[datalen - 2], data[datalen - 1])); 
 
        // here TLV decoder...
-       if (decodeTLV) {
-               PrintAndLog("--- TLV decoded:");
+       if (decodeTLV && datalen > 4) {
+               TLVPrintFromBuffer(data, datalen - 2);
        }
        
        return 0;
index 919ece5ab607870bf52c50eda060cbe3f9b52464..d11d17ebf23feb314e0865fab290d761a5f2e56d 100644 (file)
@@ -31,6 +31,7 @@
 #include "cmdhfmfu.h"
 #include "mifarehost.h"
 #include "emv/apduinfo.h"
+#include "emv/emvcore.h"
 
 // structure and database for uid -> tagtype lookups 
 typedef struct { 
diff --git a/client/emv/dump.c b/client/emv/dump.c
new file mode 100644 (file)
index 0000000..9915ad7
--- /dev/null
@@ -0,0 +1,57 @@
+/*
+ * libopenemv - a library to work with EMV family of smart cards
+ * Copyright (C) 2015 Dmitry Eremin-Solenikov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "dump.h"
+
+#include <stdio.h>
+
+void dump_buffer_simple(const unsigned char *ptr, size_t len, FILE *f)
+{
+       int i;
+
+       if (!f)
+               f = stdout;
+
+       for (i = 0; i < len; i ++)
+               fprintf(f, "%s%02hhX", i ? " " : "", ptr[i]);
+}
+
+void dump_buffer(const unsigned char *ptr, size_t len, FILE *f)
+{
+       int i, j;
+
+       if (!f)
+               f = stdout;
+
+       for (i = 0; i < len; i += 16) {
+               fprintf(f, "\t%02x:", i);
+               for (j = 0; j < 16; j++) {
+                       if (i + j < len)
+                               fprintf(f, " %02hhx", ptr[i + j]);
+                       else
+                               fprintf(f, "   ");
+               }
+               fprintf(f, " |");
+               for (j = 0; j < 16 && i + j < len; j++) {
+                       fprintf(f, "%c", (ptr[i+j] >= 0x20 && ptr[i+j] < 0x7f) ? ptr[i+j] : '.' );
+               }
+               fprintf(f, "\n");
+       }
+}
+
diff --git a/client/emv/dump.h b/client/emv/dump.h
new file mode 100644 (file)
index 0000000..5976da4
--- /dev/null
@@ -0,0 +1,24 @@
+/*
+ * libopenemv - a library to work with EMV family of smart cards
+ * Copyright (C) 2015 Dmitry Eremin-Solenikov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#ifndef DUMP_H
+#define DUMP_H
+
+#include <stdio.h>
+
+void dump_buffer_simple(const unsigned char *ptr, size_t len, FILE *f);
+void dump_buffer(const unsigned char *ptr, size_t len, FILE *f);
+
+#endif
diff --git a/client/emv/emv_tags.c b/client/emv/emv_tags.c
new file mode 100644 (file)
index 0000000..9bcf200
--- /dev/null
@@ -0,0 +1,480 @@
+/*
+ * libopenemv - a library to work with EMV family of smart cards
+ * Copyright (C) 2015 Dmitry Eremin-Solenikov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "tlv.h"
+#include "emv_tags.h"
+
+#include <stdlib.h>
+
+enum emv_tag_t {
+       EMV_TAG_GENERIC,
+       EMV_TAG_BITMASK,
+       EMV_TAG_DOL,
+       EMV_TAG_CVM_LIST,
+       EMV_TAG_STRING,
+       EMV_TAG_NUMERIC,
+       EMV_TAG_YYMMDD,
+       EMV_TAG_FCI,
+};
+
+struct emv_tag {
+       tlv_tag_t tag;
+       char *name;
+       enum emv_tag_t type;
+       const void *data;
+};
+
+struct emv_tag_bit {
+       unsigned bit;
+       const char *name;
+};
+
+#define EMV_BIT(byte, bit) ((byte - 1) * 8 + (8 - bit))
+#define EMV_BIT_FINISH { (~0), NULL }
+
+static const struct emv_tag_bit EMV_AIP[] = {
+       { EMV_BIT(1, 7), "SDA supported" },
+       { EMV_BIT(1, 6), "DDA supported" },
+       { EMV_BIT(1, 5), "Cardholder verification is supported" },
+       { EMV_BIT(1, 4), "Terminal risk management is to be performed" },
+       { EMV_BIT(1, 3), "Issuer authentication is supported" },
+       { EMV_BIT(1, 2), "Reserved for use by the EMV Contactless Specifications" },
+       { EMV_BIT(1, 1), "CDA supported" },
+       { EMV_BIT(2, 8), "Reserved for use by the EMV Contactless Specifications" },
+       { EMV_BIT(2, 7), "Reserved for use by the EMV Contactless Specifications" },
+       { EMV_BIT(2, 6), "Reserved for use by the EMV Contactless Specifications" },
+       { EMV_BIT(2, 1), "Reserved for use by the EMV Contactless Specifications" },
+       EMV_BIT_FINISH,
+};
+
+static const struct emv_tag_bit EMV_AUC[] = {
+       { EMV_BIT(1, 8), "Valid for domestic cash transactions" },
+       { EMV_BIT(1, 7), "Valid for international cash transactions" },
+       { EMV_BIT(1, 6), "Valid for domestic goods" },
+       { EMV_BIT(1, 5), "Valid for international goods" },
+       { EMV_BIT(1, 4), "Valid for domestic services" },
+       { EMV_BIT(1, 3), "Valid for international services" },
+       { EMV_BIT(1, 2), "Valid for ATMs" },
+       { EMV_BIT(1, 1), "Valid at terminals other than ATMs" },
+       { EMV_BIT(2, 8), "Domestic cashback allowed" },
+       { EMV_BIT(2, 7), "International cashback allowed" },
+       EMV_BIT_FINISH,
+};
+
+static const struct emv_tag_bit EMV_TVR[] = {
+       { EMV_BIT(1, 8), "Offline data authentication was not performed" },
+       { EMV_BIT(1, 7), "SDA failed" },
+       { EMV_BIT(1, 6), "ICC data missing" },
+       { EMV_BIT(1, 5), "Card appears on terminal exception file" },
+       { EMV_BIT(1, 4), "DDA failed" },
+       { EMV_BIT(1, 3), "CDA failed" },
+       { EMV_BIT(1, 2), "SDA selected" },
+       { EMV_BIT(2, 8), "ICC and terminal have different application versions" },
+       { EMV_BIT(2, 7), "Expired application" },
+       { EMV_BIT(2, 6), "Application not yet effective" },
+       { EMV_BIT(2, 5), "Requested service not allowed for card product" },
+       { EMV_BIT(2, 4), "New card" },
+       { EMV_BIT(3, 8), "Cardholder verification was not successful" },
+       { EMV_BIT(3, 7), "Unrecognised CVM" },
+       { EMV_BIT(3, 6), "PIN Try Limit exceeded" },
+       { EMV_BIT(3, 5), "PIN entry required and PIN pad not present or not working" },
+       { EMV_BIT(3, 4), "PIN entry required, PIN pad present, but PIN was not entered" },
+       { EMV_BIT(3, 3), "Online PIN entered" },
+       { EMV_BIT(4, 8), "Transaction exceeds floor limit" },
+       { EMV_BIT(4, 7), "Lower consecutive offline limit exceeded" },
+       { EMV_BIT(4, 6), "Upper consecutive offline limit exceeded" },
+       { EMV_BIT(4, 5), "Transaction selected randomly for online processing" },
+       { EMV_BIT(4, 4), "Merchant forced transaction online" },
+       { EMV_BIT(5, 8), "Default TDOL used" },
+       { EMV_BIT(5, 7), "Issuer authentication failed" },
+       { EMV_BIT(5, 6), "Script processing failed before final GENERATE AC" },
+       { EMV_BIT(5, 5), "Script processing failed after final GENERATE AC" },
+       { EMV_BIT(5, 4), "Reserved for use by the EMV Contactless Specifications" },
+       { EMV_BIT(5, 3), "Reserved for use by the EMV Contactless Specifications" },
+       { EMV_BIT(5, 2), "Reserved for use by the EMV Contactless Specifications" },
+       { EMV_BIT(5, 1), "Reserved for use by the EMV Contactless Specifications" },
+       EMV_BIT_FINISH,
+};
+
+static const struct emv_tag emv_tags[] = {
+       { 0x00  , "Unknown ???" },
+       { 0x4f  , "Application Dedicated File (ADF) Name" },
+       { 0x50  , "Application Label", EMV_TAG_STRING },
+       { 0x56  , "Track 1 Data" },
+       { 0x57  , "Track 2 Equivalent Data" },
+       { 0x5a  , "Application Primary Account Number (PAN)" },
+       { 0x5f20, "Cardholder Name", EMV_TAG_STRING },
+       { 0x5f24, "Application Expiration Date", EMV_TAG_YYMMDD },
+       { 0x5f25, "Application Effective Date", EMV_TAG_YYMMDD },
+       { 0x5f28, "Issuer Country Code", EMV_TAG_NUMERIC },
+       { 0x5f2a, "Transaction Currency Code", EMV_TAG_NUMERIC },
+       { 0x5f2d, "Language Preference", EMV_TAG_STRING },
+       { 0x5f30, "Service Code", EMV_TAG_NUMERIC },
+       { 0x5f34, "Application Primary Account Number (PAN) Sequence Number", EMV_TAG_NUMERIC },
+       { 0x61  , "Application Template" },
+       { 0x6f  , "File Control Information (FCI) Template", EMV_TAG_FCI },
+       { 0x70  , "READ RECORD Response Message Template" },
+       { 0x77  , "Response Message Template Format 2" },
+       { 0x80  , "Response Message Template Format 1" },
+       { 0x82  , "Application Interchange Profile", EMV_TAG_BITMASK, &EMV_AIP },
+       { 0x83  , "Command Template" },
+       { 0x84  , "Dedicated File (DF) Name" },
+       { 0x87  , "Application Priority Indicator" },
+       { 0x88  , "Short File Identifier (SFI)" },
+       { 0x8a  , "Authorisation Response Code" },
+       { 0x8c  , "Card Risk Management Data Object List 1 (CDOL1)", EMV_TAG_DOL },
+       { 0x8d  , "Card Risk Management Data Object List 2 (CDOL2)", EMV_TAG_DOL },
+       { 0x8e  , "Cardholder Verification Method (CVM) List", EMV_TAG_CVM_LIST },
+       { 0x8f  , "Certification Authority Public Key Index" },
+       { 0x90  , "Issuer Public Key Certificate" },
+       { 0x91  , "Issuer Authentication Data" },
+       { 0x92  , "Issuer Public Key Remainder" },
+       { 0x93  , "Signed Static Application Data" },
+       { 0x94  , "Application File Locator (AFL)" },
+       { 0x95  , "Terminal Verification Results" },
+       { 0x9a  , "Transaction Date", EMV_TAG_YYMMDD },
+       { 0x9c  , "Transaction Type" },
+       { 0x9f02, "Amount, Authorised (Numeric)", EMV_TAG_NUMERIC },
+       { 0x9f03, "Amount, Other (Numeric)", EMV_TAG_NUMERIC, },
+       { 0x9f07, "Application Usage Control", EMV_TAG_BITMASK, &EMV_AUC },
+       { 0x9f08, "Application Version Number" },
+       { 0x9f0d, "Issuer Action Code - Default", EMV_TAG_BITMASK, &EMV_TVR },
+       { 0x9f0e, "Issuer Action Code - Denial", EMV_TAG_BITMASK, &EMV_TVR },
+       { 0x9f0f, "Issuer Action Code - Online", EMV_TAG_BITMASK, &EMV_TVR },
+       { 0x9f10, "Issuer Application Data" },
+       { 0x9f11, "Issuer Code Table Index", EMV_TAG_NUMERIC },
+       { 0x9f12, "Application Preferred Name", EMV_TAG_STRING },
+       { 0x9f13, "Last Online Application Transaction Counter (ATC) Register" },
+       { 0x9f17, "Personal Identification Number (PIN) Try Counter" },
+       { 0x9f1a, "Terminal Country Code" },
+       { 0x9f1f, "Track 1 Discretionary Data", EMV_TAG_STRING },
+       { 0x9f21, "Transaction Time" },
+       { 0x9f26, "Application Cryptogram" },
+       { 0x9f27, "Cryptogram Information Data" },
+       { 0x9f2d, "ICC PIN Encipherment Public Key Certificate" },
+       { 0x9f2e, "ICC PIN Encipherment Public Key Exponent" },
+       { 0x9f2f, "ICC PIN Encipherment Public Key Remainder" },
+       { 0x9f32, "Issuer Public Key Exponent" },
+       { 0x9f34, "Cardholder Verification Method (CVM) Results" },
+       { 0x9f35, "Terminal Type" },
+       { 0x9f36, "Application Transaction Counter (ATC)" },
+       { 0x9f37, "Unpredictable Number" },
+       { 0x9f38, "Processing Options Data Object List (PDOL)", EMV_TAG_DOL },
+       { 0x9f42, "Application Currency Code", EMV_TAG_NUMERIC },
+       { 0x9f44, "Application Currency Exponent", EMV_TAG_NUMERIC },
+       { 0x9f45, "Data Authentication Code" },
+       { 0x9f46, "ICC Public Key Certificate" },
+       { 0x9f47, "ICC Public Key Exponent" },
+       { 0x9f48, "ICC Public Key Remainder" },
+       { 0x9f49, "Dynamic Data Authentication Data Object List (DDOL)", EMV_TAG_DOL },
+       { 0x9f4a, "Static Data Authentication Tag List" },
+       { 0x9f4b, "Signed Dynamic Application Data" },
+       { 0x9f4c, "ICC Dynamic Number" },
+       { 0x9f4d, "Log Entry" },
+       { 0x9f4f, "Log Format", EMV_TAG_DOL },
+       { 0x9f62, "PCVC3(Track1)" },
+       { 0x9f63, "PUNATC(Track1)" },
+       { 0x9f64, "NATC(Track1)" },
+       { 0x9f65, "PCVC3(Track2)" },
+       { 0x9f66, "PUNATC(Track2)" },
+       { 0x9f67, "NATC(Track2)" },
+       { 0x9f6b, "Track 2 Data" },
+       { 0xa5  , "File Control Information (FCI) Proprietary Template" },
+       { 0xbf0c, "File Control Information (FCI) Issuer Discretionary Data" },
+};
+
+static int emv_sort_tag(tlv_tag_t tag)
+{
+       return (int)(tag >= 0x100 ? tag : tag << 8);
+}
+
+static int emv_tlv_compare(const void *a, const void *b)
+{
+       const struct tlv *tlv = a;
+       const struct emv_tag *tag = b;
+
+       return emv_sort_tag(tlv->tag) - (emv_sort_tag(tag->tag));
+}
+
+static const struct emv_tag *emv_get_tag(const struct tlv *tlv)
+{
+       struct emv_tag *tag = bsearch(tlv, emv_tags, sizeof(emv_tags)/sizeof(emv_tags[0]),
+                       sizeof(emv_tags[0]), emv_tlv_compare);
+
+       return tag ? tag : &emv_tags[0];
+}
+
+static const char *bitstrings[] = {
+       ".......1",
+       "......1.",
+       ".....1..",
+       "....1...",
+       "...1....",
+       "..1.....",
+       ".1......",
+       "1.......",
+};
+
+static void emv_tag_dump_bitmask(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+{
+       const struct emv_tag_bit *bits = tag->data;
+       unsigned bit, byte;
+
+       for (byte = 1; byte <= tlv->len; byte ++) {
+               unsigned char val = tlv->value[byte - 1];
+               fprintf(f, "\tByte %u (%02x)\n", byte, val);
+               for (bit = 8; bit > 0; bit--, val <<= 1) {
+                       if (val & 0x80)
+                               fprintf(f, "\t\t%s - '%s'\n", bitstrings[bit - 1],
+                                               bits->bit == EMV_BIT(byte, bit) ? bits->name : "Unknown");
+                       if (bits->bit == EMV_BIT(byte, bit))
+                               bits ++;
+               }
+       }
+}
+
+static void emv_tag_dump_dol(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+{
+       const unsigned char *buf = tlv->value;
+       size_t left = tlv->len;
+
+       while (left) {
+               struct tlv doltlv;
+               const struct emv_tag *doltag;
+
+               if (!tlv_parse_tl(&buf, &left, &doltlv)) {
+                       fprintf(f, "Invalid Tag-Len\n");
+                       continue;
+               }
+
+               doltag = emv_get_tag(&doltlv);
+
+               fprintf(f, "\tTag %4hx len %02zx ('%s')\n", doltlv.tag, doltlv.len, doltag->name);
+       }
+}
+
+static void emv_tag_dump_fci(const struct tlv *tlv, const struct emv_tag *tag, FILE *f) {
+       const unsigned char *buf = tlv->value;
+       size_t left = tlv->len;
+
+       while (left) {
+               struct tlv doltlv;
+               const struct emv_tag *doltag;
+
+               if (!tlv_parse_tl(&buf, &left, &doltlv)) {
+                       fprintf(f, "Invalid Tag-Len\n");
+                       continue;
+               }
+
+               doltag = emv_get_tag(&doltlv);
+
+               fprintf(f, "\t--%2hx[%02zx]'%s'\n", doltlv.tag, doltlv.len, doltag->name);
+       }
+}
+
+static void emv_tag_dump_string(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+{
+       fprintf(f, "\tString value '");
+       fwrite(tlv->value, 1, tlv->len, f);
+       fprintf(f, "'\n");
+}
+
+static unsigned long emv_value_numeric(const struct tlv *tlv, unsigned start, unsigned end)
+{
+       unsigned long ret = 0;
+       int i;
+
+       if (end > tlv->len * 2)
+               return ret;
+       if (start >= end)
+               return ret;
+
+       if (start & 1) {
+               ret += tlv->value[start/2] & 0xf;
+               i = start + 1;
+       } else
+               i = start;
+
+       for (; i < end - 1; i += 2) {
+               ret *= 10;
+               ret += tlv->value[i/2] >> 4;
+               ret *= 10;
+               ret += tlv->value[i/2] & 0xf;
+       }
+
+       if (end & 1) {
+               ret *= 10;
+               ret += tlv->value[end/2] >> 4;
+       }
+
+       return ret;
+}
+
+static void emv_tag_dump_numeric(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+{
+       fprintf(f, "\tNumeric value %lu\n", emv_value_numeric(tlv, 0, tlv->len * 2));
+}
+
+static void emv_tag_dump_yymmdd(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+{
+       fprintf(f, "\tDate: 20%02ld.%ld.%ld\n",
+                       emv_value_numeric(tlv, 0, 2),
+                       emv_value_numeric(tlv, 2, 4),
+                       emv_value_numeric(tlv, 4, 6));
+}
+
+static uint32_t emv_get_binary(const unsigned char *S)
+{
+       return (S[0] << 24) | (S[1] << 16) | (S[2] << 8) | (S[3] << 0);
+}
+
+static void emv_tag_dump_cvm_list(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+{
+       uint32_t X, Y;
+       int i;
+
+       if (tlv->len < 10 || tlv->len % 2) {
+               fprintf(f, "\tINVALID!\n");
+               return;
+       }
+
+       X = emv_get_binary(tlv->value);
+       Y = emv_get_binary(tlv->value + 4);
+
+       fprintf(f, "\tX: %d\n", X);
+       fprintf(f, "\tY: %d\n", Y);
+
+       for (i = 8; i < tlv->len; i+= 2) {
+               const char *method;
+               const char *condition;
+
+               switch (tlv->value[i] & 0x3f) {
+               case 0x0:
+                       method = "Fail CVM processing";
+                       break;
+               case 0x1:
+                       method = "Plaintext PIN verification performed by ICC";
+                       break;
+               case 0x2:
+                       method = "Enciphered PIN verified online";
+                       break;
+               case 0x3:
+                       method = "Plaintext PIN verification performed by ICC and signature (paper)";
+                       break;
+               case 0x4:
+                       method = "Enciphered PIN verification performed by ICC";
+                       break;
+               case 0x5:
+                       method = "Enciphered PIN verification performed by ICC and signature (paper)";
+                       break;
+               case 0x1e:
+                       method = "Signature (paper)";
+                       break;
+               case 0x1f:
+                       method = "No CVM required";
+                       break;
+               case 0x3f:
+                       method = "NOT AVAILABLE!";
+                       break;
+               default:
+                       method = "Unknown";
+                       break;
+               }
+
+               switch (tlv->value[i+1]) {
+               case 0x00:
+                       condition = "Always";
+                       break;
+               case 0x01:
+                       condition = "If unattended cash";
+                       break;
+               case 0x02:
+                       condition = "If not unattended cash and not manual cash and not purchase with cashback";
+                       break;
+               case 0x03:
+                       condition = "If terminal supports the CVM";
+                       break;
+               case 0x04:
+                       condition = "If manual cash";
+                       break;
+               case 0x05:
+                       condition = "If purchase with cashback";
+                       break;
+               case 0x06:
+                       condition = "If transaction is in the application currency and is under X value";
+                       break;
+               case 0x07:
+                       condition = "If transaction is in the application currency and is over X value";
+                       break;
+               case 0x08:
+                       condition = "If transaction is in the application currency and is under Y value";
+                       break;
+               case 0x09:
+                       condition = "If transaction is in the application currency and is over Y value";
+                       break;
+               default:
+                       condition = "Unknown";
+                       break;
+               }
+
+               fprintf(f, "\t%02x %02x: '%s' '%s' and '%s' if this CVM is unsuccessful\n",
+                               tlv->value[i], tlv->value[i+1],
+                               method, condition, (tlv->value[i] & 0x40) ? "continue" : "fail");
+       }
+}
+
+bool emv_tag_dump(const struct tlv *tlv, FILE *f)
+{
+       if (!tlv) {
+               fprintf(f, "NULL\n");
+               return false;
+       }
+
+       const struct emv_tag *tag = emv_get_tag(tlv);
+
+       fprintf(f, "--%2hx[%02zx] '%s':\n", tlv->tag, tlv->len, tag->name);
+
+       switch (tag->type) {
+       case EMV_TAG_GENERIC:
+               break;
+       case EMV_TAG_BITMASK:
+               emv_tag_dump_bitmask(tlv, tag, f);
+               break;
+       case EMV_TAG_DOL:
+               emv_tag_dump_dol(tlv, tag, f);
+               break;
+       case EMV_TAG_CVM_LIST:
+               emv_tag_dump_cvm_list(tlv, tag, f);
+               break;
+       case EMV_TAG_STRING:
+               emv_tag_dump_string(tlv, tag, f);
+               break;
+       case EMV_TAG_NUMERIC:
+               emv_tag_dump_numeric(tlv, tag, f);
+               break;
+       case EMV_TAG_YYMMDD:
+               emv_tag_dump_yymmdd(tlv, tag, f);
+               break;
+       case EMV_TAG_FCI:
+               emv_tag_dump_fci(tlv, tag, f);
+               break;
+       };
+
+       return true;
+}
diff --git a/client/emv/emv_tags.h b/client/emv/emv_tags.h
new file mode 100644 (file)
index 0000000..de6d9d1
--- /dev/null
@@ -0,0 +1,24 @@
+/*
+ * libopenemv - a library to work with EMV family of smart cards
+ * Copyright (C) 2015 Dmitry Eremin-Solenikov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#ifndef TAGS_H
+#define TAGS_H
+
+#include "tlv.h"
+#include <stdio.h>
+
+bool emv_tag_dump(const struct tlv *tlv, FILE *f);
+
+#endif
diff --git a/client/emv/emvcore.c b/client/emv/emvcore.c
new file mode 100644 (file)
index 0000000..6f8892f
--- /dev/null
@@ -0,0 +1,31 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2017 Merlok
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// EMV core functions
+//-----------------------------------------------------------------------------
+
+#include "emvcore.h"
+
+static bool print_cb(void *data, const struct tlv *tlv) {
+       emv_tag_dump(tlv, stdout);
+       dump_buffer(tlv->value, tlv->len, stdout);
+
+       return true;
+}
+
+void TLVPrintFromBuffer(uint8_t *data, int datalen) {
+       struct tlvdb *t = NULL;
+       t = tlvdb_parse(data, datalen);
+       if (t) {
+               PrintAndLog("TLV decoded:");
+               
+               tlvdb_visit(t, print_cb, NULL);
+               tlvdb_free(t);
+       } else {
+               PrintAndLog("TLV ERROR: Can't parse response as TLV tree.");
+       }
+}
diff --git a/client/emv/emvcore.h b/client/emv/emvcore.h
new file mode 100644 (file)
index 0000000..523b92a
--- /dev/null
@@ -0,0 +1,31 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2017 Merlok
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// EMV core functions
+//-----------------------------------------------------------------------------
+
+#ifndef EMVCORE_H__
+#define EMVCORE_H__
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include "util.h"
+#include "common.h"
+#include "ui.h"
+#include "emv/tlv.h"
+#include "emv/dump.h"
+#include "emv/emv_tags.h"
+
+extern void TLVPrintFromBuffer(uint8_t *data, int datalen);
+
+#endif
+
+
+
+
diff --git a/client/emv/tlv.c b/client/emv/tlv.c
new file mode 100644 (file)
index 0000000..d78f049
--- /dev/null
@@ -0,0 +1,415 @@
+/*
+ * libopenemv - a library to work with EMV family of smart cards
+ * Copyright (C) 2012, 2015 Dmitry Eremin-Solenikov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * https://github.com/lumag/emv-tools/blob/master/lib/tlv.c
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "tlv.h"
+
+#include <string.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#define TLV_TAG_CLASS_MASK     0xc0
+#define TLV_TAG_COMPLEX                0x20
+#define TLV_TAG_VALUE_MASK     0x1f
+#define TLV_TAG_VALUE_CONT     0x1f
+#define TLV_TAG_INVALID                0
+
+#define TLV_LEN_LONG           0x80
+#define TLV_LEN_MASK           0x7f
+#define TLV_LEN_INVALID                (~0)
+
+// http://radek.io/2012/11/10/magical-container_of-macro/
+//#define container_of(ptr, type, member) ({                          
+//     const typeof( ((type *)0)->member ) *__mptr = (ptr);    
+//        (type *)( (char *)__mptr - offsetof(type,member) );})
+
+struct tlvdb {
+       struct tlv tag;
+       struct tlvdb *next;
+       struct tlvdb *parent;
+       struct tlvdb *children;
+};
+
+struct tlvdb_root {
+       struct tlvdb db;
+       size_t len;
+       unsigned char buf[0];
+};
+
+static tlv_tag_t tlv_parse_tag(const unsigned char **buf, size_t *len)
+{
+       tlv_tag_t tag;
+
+       if (*len == 0)
+               return TLV_TAG_INVALID;
+       tag = **buf;
+       --*len;
+       ++*buf;
+       if ((tag & TLV_TAG_VALUE_MASK) != TLV_TAG_VALUE_CONT)
+               return tag;
+
+       if (*len == 0)
+               return TLV_TAG_INVALID;
+
+       tag <<= 8;
+       tag |= **buf;
+       --*len;
+       ++*buf;
+
+       return tag;
+}
+
+static size_t tlv_parse_len(const unsigned char **buf, size_t *len)
+{
+       size_t l;
+
+       if (*len == 0)
+               return TLV_LEN_INVALID;
+
+       l = **buf;
+       --*len;
+       ++*buf;
+
+       if (!(l & TLV_LEN_LONG))
+               return l;
+
+       size_t ll = l &~ TLV_LEN_LONG;
+       if (*len < ll)
+               return TLV_LEN_INVALID;
+
+       /* FIXME */
+       if (ll != 1)
+               return TLV_LEN_INVALID;
+
+       l = **buf;
+       --*len;
+       ++*buf;
+
+       return l;
+}
+
+bool tlv_parse_tl(const unsigned char **buf, size_t *len, struct tlv *tlv)
+{
+       tlv->value = 0;
+
+       tlv->tag = tlv_parse_tag(buf, len);
+       if (tlv->tag == TLV_TAG_INVALID)
+               return false;
+
+       tlv->len = tlv_parse_len(buf, len);
+       if (tlv->len == TLV_LEN_INVALID)
+               return false;
+
+       return true;
+}
+
+static struct tlvdb *tlvdb_parse_children(struct tlvdb *parent);
+
+static bool tlvdb_parse_one(struct tlvdb *tlvdb,
+               struct tlvdb *parent,
+               const unsigned char **tmp,
+               size_t *left)
+{
+       tlvdb->next = tlvdb->children = NULL;
+       tlvdb->parent = parent;
+
+       tlvdb->tag.tag = tlv_parse_tag(tmp, left);
+       if (tlvdb->tag.tag == TLV_TAG_INVALID)
+               goto err;
+
+       tlvdb->tag.len = tlv_parse_len(tmp, left);
+       if (tlvdb->tag.len == TLV_LEN_INVALID)
+               goto err;
+
+       if (tlvdb->tag.len > *left)
+               goto err;
+
+       tlvdb->tag.value = *tmp;
+
+       *tmp += tlvdb->tag.len;
+       *left -= tlvdb->tag.len;
+
+       if (tlv_is_constructed(&tlvdb->tag) && (tlvdb->tag.len != 0)) {
+               tlvdb->children = tlvdb_parse_children(tlvdb);
+               if (!tlvdb->children)
+                       goto err;
+       } else {
+               tlvdb->children = NULL;
+       }
+
+       return true;
+
+err:
+       return false;
+}
+
+static struct tlvdb *tlvdb_parse_children(struct tlvdb *parent)
+{
+       const unsigned char *tmp = parent->tag.value;
+       size_t left = parent->tag.len;
+       struct tlvdb *tlvdb, *first = NULL, *prev = NULL;
+
+       while (left != 0) {
+               tlvdb = malloc(sizeof(*tlvdb));
+               if (prev)
+                       prev->next = tlvdb;
+               else
+                       first = tlvdb;
+               prev = tlvdb;
+
+               if (!tlvdb_parse_one(tlvdb, parent, &tmp, &left))
+                       goto err;
+
+               tlvdb->parent = parent;
+       }
+
+       return first;
+
+err:
+       tlvdb_free(first);
+
+       return NULL;
+}
+
+struct tlvdb *tlvdb_parse(const unsigned char *buf, size_t len)
+{
+       struct tlvdb_root *root;
+       const unsigned char *tmp;
+       size_t left;
+
+       if (!len || !buf)
+               return NULL;
+
+       root = malloc(sizeof(*root) + len);
+       root->len = len;
+       memcpy(root->buf, buf, len);
+
+       tmp = root->buf;
+       left = len;
+
+       if (!tlvdb_parse_one(&root->db, NULL, &tmp, &left))
+               goto err;
+
+       if (left)
+               goto err;
+
+       return &root->db;
+
+err:
+       tlvdb_free(&root->db);
+
+       return NULL;
+}
+
+struct tlvdb *tlvdb_parse_multi(const unsigned char *buf, size_t len)
+{
+       struct tlvdb_root *root;
+       const unsigned char *tmp;
+       size_t left;
+
+       if (!len || !buf)
+               return NULL;
+
+       root = malloc(sizeof(*root) + len);
+       root->len = len;
+       memcpy(root->buf, buf, len);
+
+       tmp = root->buf;
+       left = len;
+
+       if (!tlvdb_parse_one(&root->db, NULL, &tmp, &left))
+               goto err;
+
+       while (left != 0) {
+               struct tlvdb *db = malloc(sizeof(*db));
+               if (!tlvdb_parse_one(db, NULL, &tmp, &left)) {
+                       free (db);
+                       goto err;
+               }
+
+               tlvdb_add(&root->db, db);
+       }
+
+       return &root->db;
+
+err:
+       tlvdb_free(&root->db);
+
+       return NULL;
+}
+
+struct tlvdb *tlvdb_fixed(tlv_tag_t tag, size_t len, const unsigned char *value)
+{
+       struct tlvdb_root *root = malloc(sizeof(*root) + len);
+
+       root->len = len;
+       memcpy(root->buf, value, len);
+
+       root->db.parent = root->db.next = root->db.children = NULL;
+       root->db.tag.tag = tag;
+       root->db.tag.len = len;
+       root->db.tag.value = root->buf;
+
+       return &root->db;
+}
+
+struct tlvdb *tlvdb_external(tlv_tag_t tag, size_t len, const unsigned char *value)
+{
+       struct tlvdb_root *root = malloc(sizeof(*root));
+
+       root->len = 0;
+
+       root->db.parent = root->db.next = root->db.children = NULL;
+       root->db.tag.tag = tag;
+       root->db.tag.len = len;
+       root->db.tag.value = value;
+
+       return &root->db;
+}
+
+void tlvdb_free(struct tlvdb *tlvdb)
+{
+       struct tlvdb *next = NULL;
+
+       if (!tlvdb)
+               return;
+
+       for (; tlvdb; tlvdb = next) {
+               next = tlvdb->next;
+               tlvdb_free(tlvdb->children);
+               free(tlvdb);
+       }
+}
+
+void tlvdb_add(struct tlvdb *tlvdb, struct tlvdb *other)
+{
+       while (tlvdb->next) {
+               tlvdb = tlvdb->next;
+       }
+
+       tlvdb->next = other;
+}
+
+void tlvdb_visit(const struct tlvdb *tlvdb, tlv_cb cb, void *data)
+{
+       struct tlvdb *next = NULL;
+
+       if (!tlvdb)
+               return;
+
+       for (; tlvdb; tlvdb = next) {
+               next = tlvdb->next;
+               cb(data, &tlvdb->tag);
+               tlvdb_visit(tlvdb->children, cb, data);
+       }
+}
+
+static const struct tlvdb *tlvdb_next(const struct tlvdb *tlvdb)
+{
+       if (tlvdb->children)
+               return tlvdb->children;
+
+       while (tlvdb) {
+               if (tlvdb->next)
+                       return tlvdb->next;
+
+               tlvdb = tlvdb->parent;
+       }
+
+       return NULL;
+}
+
+const struct tlv *tlvdb_get(const struct tlvdb *tlvdb, tlv_tag_t tag, const struct tlv *prev)
+{
+       if (prev) {
+//             tlvdb = tlvdb_next(container_of(prev, struct tlvdb, tag));
+               tlvdb = tlvdb_next((struct tlvdb *)prev);
+       }
+
+
+       while (tlvdb) {
+               if (tlvdb->tag.tag == tag)
+                       return &tlvdb->tag;
+
+               tlvdb = tlvdb_next(tlvdb);
+       }
+
+       return NULL;
+}
+
+unsigned char *tlv_encode(const struct tlv *tlv, size_t *len)
+{
+       size_t size = tlv->len;
+       unsigned char *data;
+       size_t pos;
+
+       if (tlv->tag > 0x100)
+               size += 2;
+       else
+               size += 1;
+
+       if (tlv->len > 0x7f)
+               size += 2;
+       else
+               size += 1;
+
+       data = malloc(size);
+       if (!data) {
+               *len = 0;
+               return NULL;
+       }
+
+       pos = 0;
+
+       if (tlv->tag > 0x100) {
+               data[pos++] = tlv->tag >> 8;
+               data[pos++] = tlv->tag & 0xff;
+       } else
+               data[pos++] = tlv->tag;
+
+       if (tlv->len > 0x7f) {
+               data[pos++] = 0x81;
+               data[pos++] = tlv->len;
+       } else
+               data[pos++] = tlv->len;
+
+       memcpy(data + pos, tlv->value, tlv->len);
+       pos += tlv->len;
+
+       *len = pos;
+       return data;
+}
+
+bool tlv_is_constructed(const struct tlv *tlv)
+{
+       return (tlv->tag < 0x100 ? tlv->tag : tlv->tag >> 8) & TLV_TAG_COMPLEX;
+}
+
+bool tlv_equal(const struct tlv *a, const struct tlv *b)
+{
+       if (!a && !b)
+               return true;
+
+       if (!a || !b)
+               return false;
+
+       return a->tag == b->tag && a->len == b->len && !memcmp(a->value, b->value, a->len);
+}
diff --git a/client/emv/tlv.h b/client/emv/tlv.h
new file mode 100644 (file)
index 0000000..3fd3f34
--- /dev/null
@@ -0,0 +1,52 @@
+/*
+ * libopenemv - a library to work with EMV family of smart cards
+ * Copyright (C) 2012, 2015 Dmitry Eremin-Solenikov
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * https://github.com/lumag/emv-tools/blob/master/lib/include/openemv/tlv.h
+ */
+
+#ifndef TLV_H
+#define TLV_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+typedef uint16_t tlv_tag_t;
+
+struct tlv {
+       tlv_tag_t tag;
+       size_t len;
+       const unsigned char *value;
+};
+
+struct tlvdb;
+typedef bool (*tlv_cb)(void *data, const struct tlv *tlv);
+
+struct tlvdb *tlvdb_fixed(tlv_tag_t tag, size_t len, const unsigned char *value);
+struct tlvdb *tlvdb_external(tlv_tag_t tag, size_t len, const unsigned char *value);
+struct tlvdb *tlvdb_parse(const unsigned char *buf, size_t len);
+struct tlvdb *tlvdb_parse_multi(const unsigned char *buf, size_t len);
+void tlvdb_free(struct tlvdb *tlvdb);
+
+void tlvdb_add(struct tlvdb *tlvdb, struct tlvdb *other);
+
+void tlvdb_visit(const struct tlvdb *tlvdb, tlv_cb cb, void *data);
+const struct tlv *tlvdb_get(const struct tlvdb *tlvdb, tlv_tag_t tag, const struct tlv *prev);
+
+bool tlv_parse_tl(const unsigned char **buf, size_t *len, struct tlv *tlv);
+unsigned char *tlv_encode(const struct tlv *tlv, size_t *len);
+bool tlv_is_constructed(const struct tlv *tlv);
+bool tlv_equal(const struct tlv *a, const struct tlv *b);
+
+#endif
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