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Merge pull request #1248 from merlokk/emv_crypto

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show some general crypto description
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Iceman 2021-04-15 22:08:21 +02:00 • committed by GitHub
commit 0a88565d0f
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 36 additions and 6 deletions
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1
CHANGELOG.md
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@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log... This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
## [unreleased][unreleased] ## [unreleased][unreleased]
- Change emv commands now works with tokenized cards (@merlokk)
- Change `hf 15 restore` - now also support EML/JSON (@iceman1001) - Change `hf 15 restore` - now also support EML/JSON (@iceman1001)
- Change - all commands now use cliparser (@iceman1001) - Change - all commands now use cliparser (@iceman1001)
- Change `lf t55xx restore` - now also support JSON (@iceman1001) - Change `lf t55xx restore` - now also support JSON (@iceman1001)

27
client/src/emv/cmdemv.c
View file

@ -1076,13 +1076,30 @@ static int CmdEMVExec(const char *Cmd) {
PrintAndLogEx(NORMAL, "AC: %s", sprint_hex(AC->value, AC->len)); PrintAndLogEx(NORMAL, "AC: %s", sprint_hex(AC->value, AC->len));
if (IAD) { if (IAD) {
PrintAndLogEx(NORMAL, "IAD: %s", sprint_hex(IAD->value, IAD->len)); PrintAndLogEx(NORMAL, "IAD: %s", sprint_hex(IAD->value, IAD->len));
if (IAD->len >= IAD->value[0] + 1) { // https://mst-company.ru/blog/ekvajring-emv-tranzaktsiya-emv-transaction-flow-chast-4-pdol-i-beskontaktnye-karty-osobennosti-qvsdc-i-quics
PrintAndLogEx(NORMAL, "\tKey index: 0x%02x", IAD->value[1]); if (IAD->value[0] == 0x1f) {
PrintAndLogEx(NORMAL, "\tCrypto ver: 0x%02x(%03d)", IAD->value[2], IAD->value[2]); PrintAndLogEx(NORMAL, " Key index: 0x%02x", IAD->value[2]);
PrintAndLogEx(NORMAL, "\tCVR: %s", sprint_hex(&IAD->value[3], IAD->value[0] - 2)); PrintAndLogEx(NORMAL, " Crypto ver: 0x%02x(%03d)", IAD->value[1], IAD->value[1]);
PrintAndLogEx(NORMAL, " CVR: %s", sprint_hex(&IAD->value[3], 5));
struct tlvdb *cvr = tlvdb_fixed(0x20, 5, &IAD->value[3]);
TLVPrintFromTLVLev(cvr, 1);
PrintAndLogEx(NORMAL, " IDD option id: 0x%02x", IAD->value[8]);
PrintAndLogEx(NORMAL, " IDD: %s", sprint_hex(&IAD->value[9], 23));
} else if (IAD->len >= IAD->value[0] + 1) {
PrintAndLogEx(NORMAL, " Key index: 0x%02x", IAD->value[1]);
PrintAndLogEx(NORMAL, " Crypto ver: 0x%02x(%03d)", IAD->value[2], IAD->value[2]);
PrintAndLogEx(NORMAL, " CVR: %s", sprint_hex(&IAD->value[3], IAD->value[0] - 2));
struct tlvdb *cvr = tlvdb_fixed(0x20, IAD->value[0] - 2, &IAD->value[3]); struct tlvdb *cvr = tlvdb_fixed(0x20, IAD->value[0] - 2, &IAD->value[3]);
TLVPrintFromTLVLev(cvr, 1); TLVPrintFromTLVLev(cvr, 1);
if (IAD->len >= 8) {
int iddLen = IAD->value[7];
PrintAndLogEx(NORMAL, " IDD length: %d", iddLen);
if (iddLen >= 1)
PrintAndLogEx(NORMAL, " IDD option id: 0x%02x", IAD->value[8]);
if (iddLen >= 2)
PrintAndLogEx(NORMAL, " IDD: %s", sprint_hex(&IAD->value[9], iddLen - 1));
}
} }
} else { } else {
PrintAndLogEx(WARNING, "WARNING: IAD not found."); PrintAndLogEx(WARNING, "WARNING: IAD not found.");

14
client/src/emv/emv_tags.c
View file

@ -557,7 +557,7 @@ static void emv_tag_dump_cvr(const struct tlv *tlv, const struct emv_tag *tag, i
return; return;
} }
if (tlv->len != tlv->value[0] + 1) { if (tlv->len != 5 && tlv->len != tlv->value[0] + 1) {
PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " "); PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " ");
PrintAndLogEx(NORMAL, " INVALID length!"); PrintAndLogEx(NORMAL, " INVALID length!");
return; return;
@ -581,6 +581,14 @@ static void emv_tag_dump_cvr(const struct tlv *tlv, const struct emv_tag *tag, i
PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " "); PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " ");
PrintAndLogEx(NORMAL, " PIN try: %x", tlv->value[2] >> 4); PrintAndLogEx(NORMAL, " PIN try: %x", tlv->value[2] >> 4);
} }
if (tlv->len >= 3 && (tlv->value[2] & 0x40)) {
PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " ");
PrintAndLogEx(NORMAL, " PIN try exceeded");
}
if (tlv->len >= 4 && (tlv->value[3] >> 4)) {
PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " ");
PrintAndLogEx(NORMAL, " Issuer script counter: %x", tlv->value[3] >> 4);
}
if (tlv->len >= 4 && (tlv->value[3] & 0x0F)) { if (tlv->len >= 4 && (tlv->value[3] & 0x0F)) {
PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " "); PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " ");
PrintAndLogEx(NORMAL, " Issuer discretionary bits: %x", tlv->value[3] & 0x0F); PrintAndLogEx(NORMAL, " Issuer discretionary bits: %x", tlv->value[3] & 0x0F);
@ -589,6 +597,10 @@ static void emv_tag_dump_cvr(const struct tlv *tlv, const struct emv_tag *tag, i
PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " "); PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " ");
PrintAndLogEx(NORMAL, " Successfully processed issuer script commands: %x", tlv->value[4] >> 4); PrintAndLogEx(NORMAL, " Successfully processed issuer script commands: %x", tlv->value[4] >> 4);
} }
if (tlv->len >= 5 && (tlv->value[4] & 0x02)) {
PrintAndLogEx(INFO, "%*s" NOLF, (level * 4), " ");
PrintAndLogEx(NORMAL, " CDCVM OK");
}
// mask 0F 0F F0 0F // mask 0F 0F F0 0F
uint8_t data[20] = {0}; uint8_t data[20] = {0};