#include "emv_tags.h"
#include <stdlib.h>
+#include <string.h>
+
+#define PRINT_INDENT(level) {for (int i = 0; i < (level); i++) fprintf(f, "\t");}
enum emv_tag_t {
EMV_TAG_GENERIC,
EMV_TAG_BITMASK,
EMV_TAG_DOL,
EMV_TAG_CVM_LIST,
+ EMV_TAG_AFL,
EMV_TAG_STRING,
EMV_TAG_NUMERIC,
EMV_TAG_YYMMDD,
- EMV_TAG_FCI,
+ EMV_TAG_CVR,
+ EMV_TAG_CID,
};
struct emv_tag {
{ 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(1, 1), "CDA supported (Combined Dynamic Data Authentication / Application Cryptogram Generation)" },
+ { EMV_BIT(2, 8), "MSD is supported (Magnetic Stripe Data)" },
{ 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_CTQ[] = {
+ { EMV_BIT(1, 8), "Online PIN Required" },
+ { EMV_BIT(1, 7), "Signature Required" },
+ { EMV_BIT(1, 6), "Go Online if Offline Data Authentication Fails and Reader is online capable" },
+ { EMV_BIT(1, 5), "Switch Interface if Offline Data Authentication fails and Reader supports VIS" },
+ { EMV_BIT(1, 4), "Go Online if Application Expired" },
+ { EMV_BIT(1, 3), "Switch Interface for Cash Transactions" },
+ { EMV_BIT(1, 2), "Switch Interface for Cashback Transactions" },
+ { EMV_BIT(2, 8), "Consumer Device CVM Performed" },
+ { EMV_BIT(2, 7), "Card supports Issuer Update Processing at the POS" },
+ EMV_BIT_FINISH,
+};
+
+static const struct emv_tag_bit EMV_TTQ[] = {
+ { EMV_BIT(1, 8), "MSD supported" },
+ { EMV_BIT(1, 7), "VSDC supported" },
+ { EMV_BIT(1, 6), "qVSDC supported" },
+ { EMV_BIT(1, 5), "EMV contact chip supported" },
+ { EMV_BIT(1, 4), "Offline-only reader" },
+ { EMV_BIT(1, 3), "Online PIN supported" },
+ { EMV_BIT(1, 2), "Signature supported" },
+ { EMV_BIT(1, 1), "Offline Data Authentication (ODA) for Online Authorizations supported\nWarning!!!! Readers compliant to this specification set TTQ byte 1 bit 1 (this field) to 0b" },
+ { EMV_BIT(2, 8), "Online cryptogram required" },
+ { EMV_BIT(2, 7), "CVM required" },
+ { EMV_BIT(2, 6), "(Contact Chip) Offline PIN supported" },
+ { EMV_BIT(3, 8), "Issuer Update Processing supported" },
+ { EMV_BIT(3, 7), "Mobile functionality supported (Consumer Device CVM)" },
+ EMV_BIT_FINISH,
+};
+
+static const struct emv_tag_bit EMV_CVR[] = {
+ // mask 0F 0F F0 0F
+ { EMV_BIT(1, 4), "CDA Performed" },
+ { EMV_BIT(1, 3), "Offline DDA Performed" },
+ { EMV_BIT(1, 2), "Issuer Authentication Not Performed" },
+ { EMV_BIT(1, 1), "Issuer Authentication performed and Failed" },
+ { EMV_BIT(2, 4), "Offline PIN Verification Performed" },
+ { EMV_BIT(2, 3), "Offline PIN Verification Performed and PIN Not Successfully Verified" },
+ { EMV_BIT(2, 2), "PIN Try Limit Exceeded" },
+ { EMV_BIT(2, 1), "Last Online Transaction Not Completed" },
+ { EMV_BIT(3, 8), "Lower Offline Transaction Count Limit Exceeded" },
+ { EMV_BIT(3, 7), "Upper Offline Transaction Count Limit Exceeded" },
+ { EMV_BIT(3, 6), "Lower Cumulative Offline Amount Limit Exceeded" },
+ { EMV_BIT(3, 5), "Upper Cumulative Offline Amount Limit Exceeded" },
+ { EMV_BIT(4, 4), "Issuer script processing failed on last transaction" },
+ { EMV_BIT(4, 3), "Offline data authentication failed on previous transaction and transaction declined offline" },
+ { EMV_BIT(4, 2), "Go Online on Next Transaction Was Set" },
+ { EMV_BIT(4, 1), "Unable to go Online" },
+ EMV_BIT_FINISH,
+};
+
+// All Data Elements by Tags used in TLV structure (according to the EMV 4.2 Standard )
+// https://www.eftlab.co.uk/index.php/site-map/knowledge-base/145-emv-nfc-tags
+// http://dexterous-programmer.blogspot.in/2012/05/emv-tags.html
static const struct emv_tag emv_tags[] = {
+ // internal
{ 0x00 , "Unknown ???" },
+ { 0x01 , "", EMV_TAG_STRING }, // string for headers
+ { 0x02 , "Raw data", }, // data
+ { 0x20 , "Cardholder Verification Results (CVR)", EMV_TAG_CVR }, // not standard!
+ { 0x21 , "Input list for Offline Data Authentication" }, // not standard! data for "Offline Data Authentication" come from "read records" command. (EMV book3 10.3)
+
+ // EMV
+ { 0x41 , "Country code and national data" },
+ { 0x42 , "Issuer Identification Number (IIN)" },
{ 0x4f , "Application Dedicated File (ADF) Name" },
{ 0x50 , "Application Label", EMV_TAG_STRING },
{ 0x56 , "Track 1 Data" },
{ 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 },
+ { 0x6f , "File Control Information (FCI) Template" },
{ 0x70 , "READ RECORD Response Message Template" },
{ 0x77 , "Response Message Template Format 2" },
{ 0x80 , "Response Message Template Format 1" },
{ 0x91 , "Issuer Authentication Data" },
{ 0x92 , "Issuer Public Key Remainder" },
{ 0x93 , "Signed Static Application Data" },
- { 0x94 , "Application File Locator (AFL)" },
+ { 0x94 , "Application File Locator (AFL)", EMV_TAG_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, },
+ { 0x9f06, "Application Identifier (AID), Terminal. ISO 7816-5" },
{ 0x9f07, "Application Usage Control", EMV_TAG_BITMASK, &EMV_AUC },
{ 0x9f08, "Application Version Number" },
+ { 0x9f0a, "Application Selection Registered Proprietary Data" }, // https://blog.ul-ts.com/posts/electronic-card-identifier-one-more-step-for-mif-compliance/
{ 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 },
{ 0x9f1f, "Track 1 Discretionary Data", EMV_TAG_STRING },
{ 0x9f21, "Transaction Time" },
{ 0x9f26, "Application Cryptogram" },
- { 0x9f27, "Cryptogram Information Data" },
+ { 0x9f27, "Cryptogram Information Data", EMV_TAG_CID },
+ { 0x9f2a, "Kernel Identifier" },
{ 0x9f2d, "ICC PIN Encipherment Public Key Certificate" },
{ 0x9f2e, "ICC PIN Encipherment Public Key Exponent" },
{ 0x9f2f, "ICC PIN Encipherment Public Key Remainder" },
{ 0x9f4c, "ICC Dynamic Number" },
{ 0x9f4d, "Log Entry" },
{ 0x9f4f, "Log Format", EMV_TAG_DOL },
+ { 0x9f60, "CVC3 (Track1)" },
+ { 0x9f61, "CVC3 (Track2)" },
{ 0x9f62, "PCVC3(Track1)" },
{ 0x9f63, "PUNATC(Track1)" },
{ 0x9f64, "NATC(Track1)" },
{ 0x9f65, "PCVC3(Track2)" },
- { 0x9f66, "PUNATC(Track2)" },
- { 0x9f67, "NATC(Track2)" },
+ { 0x9f66, "PUNATC(Track2) / Terminal Transaction Qualifiers (TTQ)", EMV_TAG_BITMASK, &EMV_TTQ },
+ { 0x9f67, "NATC(Track2) / MSD Offset" },
+ { 0x9f68, "Cardholder verification method list (PayPass)" },
+ { 0x9f69, "Card Authentication Related Data" },
+ { 0x9f6a, "Unpredictable Number", EMV_TAG_NUMERIC },
{ 0x9f6b, "Track 2 Data" },
+ { 0x9f6c, "Card Transaction Qualifiers (CTQ)", EMV_TAG_BITMASK, &EMV_CTQ },
+ { 0x9f6e, "Form Factor Indicator" },
{ 0xa5 , "File Control Information (FCI) Proprietary Template" },
{ 0xbf0c, "File Control Information (FCI) Issuer Discretionary Data" },
+ { 0xdf20, "Issuer Proprietary Bitmap (IPB)" },
};
static int emv_sort_tag(tlv_tag_t tag)
"1.......",
};
-static void emv_tag_dump_bitmask(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+static void emv_tag_dump_bitmask(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
{
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];
+ PRINT_INDENT(level);
fprintf(f, "\tByte %u (%02x)\n", byte, val);
for (bit = 8; bit > 0; bit--, val <<= 1) {
- if (val & 0x80)
+ if (val & 0x80){
+ PRINT_INDENT(level);
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)
+static void emv_tag_dump_dol(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
{
const unsigned char *buf = tlv->value;
size_t left = tlv->len;
const struct emv_tag *doltag;
if (!tlv_parse_tl(&buf, &left, &doltlv)) {
+ PRINT_INDENT(level);
fprintf(f, "Invalid Tag-Len\n");
continue;
}
doltag = emv_get_tag(&doltlv);
+ PRINT_INDENT(level);
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)
+static void emv_tag_dump_string(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
{
fprintf(f, "\tString value '");
fwrite(tlv->value, 1, tlv->len, f);
return ret;
}
-static void emv_tag_dump_numeric(const struct tlv *tlv, const struct emv_tag *tag, FILE *f)
+static void emv_tag_dump_numeric(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
{
+ PRINT_INDENT(level);
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)
+static void emv_tag_dump_yymmdd(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
{
+ PRINT_INDENT(level);
fprintf(f, "\tDate: 20%02ld.%ld.%ld\n",
emv_value_numeric(tlv, 0, 2),
emv_value_numeric(tlv, 2, 4),
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)
+// https://github.com/binaryfoo/emv-bertlv/blob/master/src/main/resources/fields/visa-cvr.txt
+static void emv_tag_dump_cvr(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level) {
+ if (!tlv || tlv->len < 1) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tINVALID!\n");
+ return;
+ }
+
+ if (tlv->len != tlv->value[0] + 1) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tINVALID length!\n");
+ return;
+ }
+
+ if (tlv->len >= 2) {
+ // AC1
+ PRINT_INDENT(level);
+ if ((tlv->value[1] & 0xC0) == 0x00) fprintf(f, "\tAC1: AAC (Transaction declined)\n");
+ if ((tlv->value[1] & 0xC0) == 0x40) fprintf(f, "\tAC1: TC (Transaction approved)\n");
+ if ((tlv->value[1] & 0xC0) == 0x80) fprintf(f, "\tAC1: ARQC (Online authorisation requested)\n");
+ if ((tlv->value[1] & 0xC0) == 0xC0) fprintf(f, "\tAC1: RFU\n");
+ // AC2
+ PRINT_INDENT(level);
+ if ((tlv->value[1] & 0x30) == 0x00) fprintf(f, "\tAC2: AAC (Transaction declined)\n");
+ if ((tlv->value[1] & 0x30) == 0x10) fprintf(f, "\tAC2: TC (Transaction approved)\n");
+ if ((tlv->value[1] & 0x30) == 0x20) fprintf(f, "\tAC2: not requested (ARQC)\n");
+ if ((tlv->value[1] & 0x30) == 0x30) fprintf(f, "\tAC2: RFU\n");
+ }
+ if (tlv->len >= 3 && (tlv->value[2] >> 4)) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tPIN try: %x\n", tlv->value[2] >> 4);
+ }
+ if (tlv->len >= 4 && (tlv->value[3] & 0x0F)) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tIssuer discretionary bits: %x\n", tlv->value[3] & 0x0F);
+ }
+ if (tlv->len >= 5 && (tlv->value[4] >> 4)) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tSuccessfully processed issuer script commands: %x\n", tlv->value[4] >> 4);
+ }
+
+ // mask 0F 0F F0 0F
+ uint8_t data[20] = {0};
+ memcpy(data, &tlv->value[1], tlv->len - 1);
+ data[0] &= 0x0F;
+ data[1] &= 0x0F;
+ data[2] &= 0xF0;
+ data[3] &= 0x0F;
+ const struct tlv bit_tlv = {
+ .tag = tlv->tag,
+ .len = tlv->len - 1,
+ .value = data,
+ };
+ const struct emv_tag bit_tag = {
+ .tag = tag->tag,
+ .name = tag->name,
+ .type = EMV_TAG_BITMASK,
+ .data = EMV_CVR,
+ };
+
+ if (data[0] || data[1] || data[2] || data[3])
+ emv_tag_dump_bitmask(&bit_tlv, &bit_tag, f, level);
+
+ return;
+}
+
+// EMV Book 3
+static void emv_tag_dump_cid(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level) {
+ if (!tlv || tlv->len < 1) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tINVALID!\n");
+ return;
+ }
+
+ PRINT_INDENT(level);
+ if ((tlv->value[0] & EMVAC_AC_MASK) == EMVAC_AAC) fprintf(f, "\tAC1: AAC (Transaction declined)\n");
+ if ((tlv->value[0] & EMVAC_AC_MASK) == EMVAC_TC) fprintf(f, "\tAC1: TC (Transaction approved)\n");
+ if ((tlv->value[0] & EMVAC_AC_MASK) == EMVAC_ARQC) fprintf(f, "\tAC1: ARQC (Online authorisation requested)\n");
+ if ((tlv->value[0] & EMVAC_AC_MASK) == EMVAC_AC_MASK) fprintf(f, "\tAC1: RFU\n");
+
+ if (tlv->value[0] & EMVCID_ADVICE) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tAdvice required!\n");
+ }
+
+ if (tlv->value[0] & EMVCID_REASON_MASK) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tReason/advice/referral code: ");
+ switch((tlv->value[0] & EMVCID_REASON_MASK)) {
+ case 0:
+ fprintf(f, "No information given\n");
+ break;
+ case 1:
+ fprintf(f, "Service not allowed\n");
+ break;
+ case 2:
+ fprintf(f, "PIN Try Limit exceeded\n");
+ break;
+ case 3:
+ fprintf(f, "Issuer authentication failed\n");
+ break;
+ default:
+ fprintf(f, "\tRFU: %2x\n", (tlv->value[0] & EMVCID_REASON_MASK));
+ break;
+ }
+ }
+
+ return;
+}
+
+static void emv_tag_dump_cvm_list(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
{
uint32_t X, Y;
int i;
if (tlv->len < 10 || tlv->len % 2) {
+ PRINT_INDENT(level);
fprintf(f, "\tINVALID!\n");
return;
}
X = emv_get_binary(tlv->value);
Y = emv_get_binary(tlv->value + 4);
+ PRINT_INDENT(level);
fprintf(f, "\tX: %d\n", X);
+ PRINT_INDENT(level);
fprintf(f, "\tY: %d\n", Y);
for (i = 8; i < tlv->len; i+= 2) {
break;
}
+ PRINT_INDENT(level);
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)
+static void emv_tag_dump_afl(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level){
+ if (tlv->len < 4 || tlv->len % 4) {
+ PRINT_INDENT(level);
+ fprintf(f, "\tINVALID!\n");
+ return;
+ }
+
+ for (int i = 0; i < tlv->len / 4; i++) {
+ PRINT_INDENT(level);
+ fprintf(f, "SFI[%02x] start:%02x end:%02x offline:%02x\n", tlv->value[i * 4 + 0] >> 3, tlv->value[i * 4 + 1], tlv->value[i * 4 + 2], tlv->value[i * 4 + 3]);
+ }
+}
+
+bool emv_tag_dump(const struct tlv *tlv, FILE *f, int level)
{
if (!tlv) {
fprintf(f, "NULL\n");
const struct emv_tag *tag = emv_get_tag(tlv);
- fprintf(f, "--%2hx[%02zx] '%s':\n", tlv->tag, tlv->len, tag->name);
+ PRINT_INDENT(level);
+ fprintf(f, "--%2hx[%02zx] '%s':", tlv->tag, tlv->len, tag->name);
switch (tag->type) {
case EMV_TAG_GENERIC:
+ fprintf(f, "\n");
break;
case EMV_TAG_BITMASK:
- emv_tag_dump_bitmask(tlv, tag, f);
+ fprintf(f, "\n");
+ emv_tag_dump_bitmask(tlv, tag, f, level);
break;
case EMV_TAG_DOL:
- emv_tag_dump_dol(tlv, tag, f);
+ fprintf(f, "\n");
+ emv_tag_dump_dol(tlv, tag, f, level);
break;
case EMV_TAG_CVM_LIST:
- emv_tag_dump_cvm_list(tlv, tag, f);
+ fprintf(f, "\n");
+ emv_tag_dump_cvm_list(tlv, tag, f, level);
+ break;
+ case EMV_TAG_AFL:
+ fprintf(f, "\n");
+ emv_tag_dump_afl(tlv, tag, f, level);
break;
case EMV_TAG_STRING:
- emv_tag_dump_string(tlv, tag, f);
+ emv_tag_dump_string(tlv, tag, f, level);
break;
case EMV_TAG_NUMERIC:
- emv_tag_dump_numeric(tlv, tag, f);
+ emv_tag_dump_numeric(tlv, tag, f, level);
break;
case EMV_TAG_YYMMDD:
- emv_tag_dump_yymmdd(tlv, tag, f);
+ emv_tag_dump_yymmdd(tlv, tag, f, level);
+ break;
+ case EMV_TAG_CVR:
+ fprintf(f, "\n");
+ emv_tag_dump_cvr(tlv, tag, f, level);
break;
- case EMV_TAG_FCI:
- emv_tag_dump_fci(tlv, tag, f);
+ case EMV_TAG_CID:
+ fprintf(f, "\n");
+ emv_tag_dump_cid(tlv, tag, f, level);
break;
};
return true;
}
+
+char *emv_get_tag_name(const struct tlv *tlv)
+{
+ static char *defstr = "";
+
+ if (!tlv)
+ return defstr;
+
+ const struct emv_tag *tag = emv_get_tag(tlv);
+ if (tag)
+ return tag->name;
+
+ return defstr;
+}
projects / proxmark3-svn / blobdiff