mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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398 lines
12 KiB
C
398 lines
12 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) 2018 Merlok
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// EMV json logic
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//-----------------------------------------------------------------------------
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#include "emvjson.h"
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#include <string.h>
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#include "commonutil.h" // ARRAYLEN
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#include "ui.h"
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#include "util.h"
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#include "proxmark3.h"
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#include "emv_tags.h"
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#include "fileutils.h"
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#include "pm3_cmd.h"
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static const ApplicationDataElm ApplicationData[] = {
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{0x82, "AIP"},
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{0x94, "AFL"},
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{0x5A, "PAN"},
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{0x5F34, "PANSeqNo"},
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{0x5F24, "ExpirationDate"},
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{0x5F25, "EffectiveDate"},
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{0x5F28, "IssuerCountryCode"},
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{0x50, "ApplicationLabel"},
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{0x9F08, "VersionNumber"},
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{0x9F42, "CurrencyCode"},
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{0x5F2D, "LanguagePreference"},
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{0x87, "PriorityIndicator"},
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{0x9F36, "ATC"}, //Application Transaction Counter
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{0x5F20, "CardholderName"},
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{0x9F38, "PDOL"},
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{0x8C, "CDOL1"},
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{0x8D, "CDOL2"},
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{0x9F07, "AUC"}, // Application Usage Control
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{0x9F6C, "CTQ"},
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{0x8E, "CVMList"},
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{0x9F0D, "IACDefault"},
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{0x9F0E, "IACDeny"},
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{0x9F0F, "IACOnline"},
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{0x8F, "CertificationAuthorityPublicKeyIndex"},
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{0x9F32, "IssuerPublicKeyExponent"},
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{0x92, "IssuerPublicKeyRemainder"},
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{0x90, "IssuerPublicKeyCertificate"},
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{0x9F47, "ICCPublicKeyExponent"},
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{0x9F46, "ICCPublicKeyCertificate"},
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{0x00, "end..."}
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};
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const char *GetApplicationDataName(tlv_tag_t tag) {
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for (int i = 0; i < ARRAYLEN(ApplicationData); i++)
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if (ApplicationData[i].Tag == tag)
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return ApplicationData[i].Name;
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return NULL;
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}
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int JsonSaveJsonObject(json_t *root, const char *path, json_t *value) {
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json_error_t error;
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if (strlen(path) < 1)
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return 1;
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if (path[0] == '$') {
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if (json_path_set(root, path, value, 0, &error)) {
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PrintAndLogEx(ERR, "ERROR: can't set json path: %s", error.text);
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return 2;
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} else {
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return 0;
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}
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} else {
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return json_object_set_new(root, path, value);
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}
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}
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int JsonSaveInt(json_t *root, const char *path, int value) {
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return JsonSaveJsonObject(root, path, json_integer(value));
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}
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int JsonSaveStr(json_t *root, const char *path, const char *value) {
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return JsonSaveJsonObject(root, path, json_string(value));
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};
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int JsonSaveBufAsHexCompact(json_t *elm, const char *path, uint8_t *data, size_t datalen) {
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char *msg = sprint_hex_inrow(data, datalen);
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if (msg && strlen(msg) && msg[strlen(msg) - 1] == ' ')
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msg[strlen(msg) - 1] = '\0';
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return JsonSaveStr(elm, path, msg);
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}
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int JsonSaveBufAsHex(json_t *elm, const char *path, uint8_t *data, size_t datalen) {
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char *msg = sprint_hex(data, datalen);
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if (msg && strlen(msg) && msg[strlen(msg) - 1] == ' ')
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msg[strlen(msg) - 1] = '\0';
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return JsonSaveStr(elm, path, msg);
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}
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int JsonSaveHex(json_t *elm, const char *path, uint64_t data, int datalen) {
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uint8_t bdata[8] = {0};
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int len = 0;
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if (!datalen) {
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for (uint64_t u = 0xffffffffffffffff; u; u = u << 8) {
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if (!(data & u)) {
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break;
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}
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len++;
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}
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if (!len)
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len = 1;
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} else {
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len = datalen;
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}
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num_to_bytes(data, len, bdata);
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return JsonSaveBufAsHex(elm, path, bdata, len);
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}
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int JsonSaveTLVValue(json_t *root, const char *path, struct tlvdb *tlvdbelm) {
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const struct tlv *tlvelm = tlvdb_get_tlv(tlvdbelm);
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if (tlvelm)
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return JsonSaveBufAsHex(root, path, (uint8_t *)tlvelm->value, tlvelm->len);
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else
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return 1;
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}
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int JsonSaveTLVElm(json_t *elm, const char *path, struct tlv *tlvelm, bool saveName, bool saveValue, bool saveAppDataLink) {
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json_error_t error;
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if (strlen(path) < 1 || !tlvelm)
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return 1;
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if (path[0] == '$') {
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json_t *obj = json_path_get(elm, path);
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if (!obj) {
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obj = json_object();
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if (json_is_array(elm)) {
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if (json_array_append_new(elm, obj)) {
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PrintAndLogEx(ERR, "ERROR: can't append array: %s", path);
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return 2;
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}
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} else {
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if (json_path_set(elm, path, obj, 0, &error)) {
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PrintAndLogEx(ERR, "ERROR: can't set json path: %s", error.text);
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return 2;
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}
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}
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}
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if (saveAppDataLink) {
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const char *AppDataName = GetApplicationDataName(tlvelm->tag);
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if (AppDataName)
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JsonSaveStr(obj, "appdata", AppDataName);
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} else {
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const char *name = emv_get_tag_name(tlvelm);
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if (saveName && name && strlen(name) > 0 && strncmp(name, "Unknown", 7))
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JsonSaveStr(obj, "name", emv_get_tag_name(tlvelm));
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JsonSaveHex(obj, "tag", tlvelm->tag, 0);
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if (saveValue) {
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JsonSaveHex(obj, "length", tlvelm->len, 0);
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JsonSaveBufAsHex(obj, "value", (uint8_t *)tlvelm->value, tlvelm->len);
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};
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}
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}
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return 0;
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}
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int JsonSaveTLVTreeElm(json_t *elm, const char *path, struct tlvdb *tlvdbelm, bool saveName, bool saveValue, bool saveAppDataLink) {
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return JsonSaveTLVElm(elm, path, (struct tlv *)tlvdb_get_tlv(tlvdbelm), saveName, saveValue, saveAppDataLink);
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}
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int JsonSaveTLVTree(json_t *root, json_t *elm, const char *path, struct tlvdb *tlvdbelm) {
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struct tlvdb *tlvp = tlvdbelm;
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while (tlvp) {
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const struct tlv *tlvpelm = tlvdb_get_tlv(tlvp);
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const char *AppDataName = NULL;
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if (tlvpelm)
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AppDataName = GetApplicationDataName(tlvpelm->tag);
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if (AppDataName) {
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char appdatalink[200] = {0};
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sprintf(appdatalink, "$.ApplicationData.%s", AppDataName);
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JsonSaveBufAsHex(root, appdatalink, (uint8_t *)tlvpelm->value, tlvpelm->len);
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}
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json_t *pelm = json_path_get(elm, path);
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if (pelm && json_is_array(pelm)) {
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json_t *appendelm = json_object();
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json_array_append_new(pelm, appendelm);
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JsonSaveTLVTreeElm(appendelm, "$", tlvp, !AppDataName, !tlvdb_elm_get_children(tlvp), AppDataName);
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pelm = appendelm;
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} else {
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JsonSaveTLVTreeElm(elm, path, tlvp, !AppDataName, !tlvdb_elm_get_children(tlvp), AppDataName);
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pelm = json_path_get(elm, path);
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}
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if (tlvdb_elm_get_children(tlvp)) {
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// get path element
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if (!pelm)
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return 1;
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// check childs element and add it if not found
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json_t *chjson = json_path_get(pelm, "$.Childs");
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if (!chjson) {
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json_object_set_new(pelm, "Childs", json_array());
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chjson = json_path_get(pelm, "$.Childs");
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}
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// check
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if (!json_is_array(chjson)) {
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PrintAndLogEx(ERR, "E->Internal logic error. `$.Childs` is not an array.");
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break;
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}
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// Recursion
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JsonSaveTLVTree(root, chjson, "$", tlvdb_elm_get_children(tlvp));
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}
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tlvp = tlvdb_elm_get_next(tlvp);
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}
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return 0;
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}
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static bool HexToBuffer(const char *errormsg, const char *hexvalue, uint8_t *buffer, size_t maxbufferlen, size_t *bufferlen) {
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int buflen = 0;
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switch (param_gethex_to_eol(hexvalue, 0, buffer, maxbufferlen, &buflen)) {
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case 1:
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PrintAndLogEx(ERR, "%s Invalid HEX value.", errormsg);
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return false;
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case 2:
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PrintAndLogEx(ERR, "%s Hex value too large.", errormsg);
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return false;
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case 3:
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PrintAndLogEx(ERR, "%s Hex value must have even number of digits.", errormsg);
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return false;
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}
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if (buflen > maxbufferlen) {
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PrintAndLogEx(ERR, "%s HEX length (%zu) more than %zu", errormsg, (bufferlen) ? *bufferlen : -1, maxbufferlen);
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return false;
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}
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if (bufferlen)
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*bufferlen = buflen;
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return true;
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}
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int JsonLoadStr(json_t *root, const char *path, char *value) {
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if (!value)
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return 1;
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json_t *jelm = json_path_get((const json_t *)root, path);
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if (!jelm || !json_is_string(jelm))
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return 2;
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const char *strval = json_string_value(jelm);
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if (!strval)
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return 1;
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memcpy(value, strval, strlen(strval));
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return 0;
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}
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int JsonLoadBufAsHex(json_t *elm, const char *path, uint8_t *data, size_t maxbufferlen, size_t *datalen) {
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if (datalen)
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*datalen = 0;
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json_t *jelm = json_path_get((const json_t *)elm, path);
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if (!jelm || !json_is_string(jelm))
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return 1;
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if (!HexToBuffer("ERROR load", json_string_value(jelm), data, maxbufferlen, datalen))
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return 2;
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return 0;
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};
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bool ParamLoadFromJson(struct tlvdb *tlv) {
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json_t *root;
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json_error_t error;
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if (!tlv) {
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PrintAndLogEx(ERR, "ERROR load params: tlv tree is NULL.");
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return false;
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}
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char *path;
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if (searchFile(&path, RESOURCES_SUBDIR, "emv_defparams", ".json", false) != PM3_SUCCESS) {
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return false;
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}
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root = json_load_file(path, 0, &error);
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free(path);
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if (!root) {
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PrintAndLogEx(ERR, "Load params: json error on line " _YELLOW_("%d") ": %s", error.line, error.text);
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return false;
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}
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if (!json_is_array(root)) {
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PrintAndLogEx(ERR, "Load params: Invalid json format. root must be array.");
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return false;
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}
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PrintAndLogEx(SUCCESS, "Load params: json(%zu) " _GREEN_("OK"), json_array_size(root));
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for (int i = 0; i < json_array_size(root); i++) {
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json_t *data, *jtag, *jlength, *jvalue;
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data = json_array_get(root, i);
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if (!json_is_object(data)) {
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PrintAndLogEx(ERR, "Load params: data [%d] is not an object", i + 1);
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json_decref(root);
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return false;
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}
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jtag = json_object_get(data, "tag");
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if (!json_is_string(jtag)) {
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PrintAndLogEx(ERR, "Load params: data [%d] tag is not a string", i + 1);
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json_decref(root);
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return false;
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}
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const char *tlvTag = json_string_value(jtag);
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jvalue = json_object_get(data, "value");
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if (!json_is_string(jvalue)) {
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PrintAndLogEx(ERR, "Load params: data [%d] value is not a string", i + 1);
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json_decref(root);
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return false;
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}
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const char *tlvValue = json_string_value(jvalue);
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jlength = json_object_get(data, "length");
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if (!json_is_number(jlength)) {
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PrintAndLogEx(ERR, "Load params: data [%d] length is not a number", i + 1);
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json_decref(root);
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return false;
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}
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int tlvLength = json_integer_value(jlength);
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if (tlvLength > 250) {
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PrintAndLogEx(ERR, "Load params: data [%d] length more than 250", i + 1);
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json_decref(root);
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return false;
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}
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PrintAndLogEx(SUCCESS, "TLV param: %s[%d]=%s", tlvTag, tlvLength, tlvValue);
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uint8_t buf[251] = {0};
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size_t buflen = 0;
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if (!HexToBuffer("TLV Error type:", tlvTag, buf, 4, &buflen)) {
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json_decref(root);
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return false;
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}
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tlv_tag_t tag = 0;
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for (int i = 0; i < buflen; i++) {
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tag = (tag << 8) | buf[i];
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}
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if (!HexToBuffer("TLV Error value:", tlvValue, buf, sizeof(buf) - 1, &buflen)) {
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json_decref(root);
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return false;
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}
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if (buflen != tlvLength) {
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PrintAndLogEx(ERR, "Load params: data [%d] length of HEX must(%zu) be identical to length in TLV param(%d)", i + 1, buflen, tlvLength);
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json_decref(root);
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return false;
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}
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tlvdb_change_or_add_node(tlv, tag, tlvLength, (const unsigned char *)buf);
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}
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json_decref(root);
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return true;
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}
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