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https://github.com/Proxmark/proxmark3.git
synced 2025-08-14 02:26:59 -07:00
Emv scan (#691)
* added `hf emv scan` command and options * add tlv tag save to json * added tlv tree navigation * added kernel id and moved some parts of code in ppse * save gpo result * added read records * extract childs from tlv works * added application data list * added work with application data section * flag --extract works * refactoring: move json functions to emvjson.h/c * added path.c to jansson * refactoring: move ParamLoadFromJson * refactoring: move defparams.json to tag-name-value structure * refactoring and add key recovering * added some codes to appdata list * refactoring: process response format 1 from GPO * added save mode * added RID to app data * add file name handling and small refactoring in argtable string processing * added finalization logic to `emv scan` and option to remove hash checking in key recovery
This commit is contained in:
Oleg Moiseenko
pwpiwi
parent
54e3cfcb74
commit
95b697f017
20 changed files with 1209 additions and 241 deletions
202
client/jansson/path.c
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202
client/jansson/path.c
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@ -0,0 +1,202 @@
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/*
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* Copyright (c) 2012 Rogerz Zhang <rogerz.zhang@gmail.com>
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*
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* Jansson is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*
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* source here https://github.com/rogerz/jansson/blob/json_path/src/path.c
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*/
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#include <string.h>
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#include <assert.h>
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#include <jansson.h>
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#include "jansson_private.h"
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json_t *json_path_get(const json_t *json, const char *path)
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{
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static const char root_chr = '$', array_open = '[';
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static const char *path_delims = ".[", *array_close = "]";
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const json_t *cursor;
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char *token, *buf, *peek, *endptr, delim = '\0';
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const char *expect;
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if (!json || !path || path[0] != root_chr)
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return NULL;
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else
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buf = jsonp_strdup(path);
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peek = buf + 1;
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cursor = json;
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token = NULL;
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expect = path_delims;
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while (peek && *peek && cursor)
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{
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char *last_peek = peek;
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peek = strpbrk(peek, expect);
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if (peek) {
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if (!token && peek != last_peek)
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goto fail;
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delim = *peek;
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*peek++ = '\0';
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} else if (expect != path_delims || !token) {
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goto fail;
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}
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if (expect == path_delims) {
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if (token) {
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cursor = json_object_get(cursor, token);
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}
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expect = (delim == array_open ? array_close : path_delims);
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token = peek;
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} else if (expect == array_close) {
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size_t index = strtol(token, &endptr, 0);
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if (*endptr)
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goto fail;
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cursor = json_array_get(cursor, index);
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token = NULL;
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expect = path_delims;
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} else {
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goto fail;
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}
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}
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jsonp_free(buf);
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return (json_t *)cursor;
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fail:
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jsonp_free(buf);
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return NULL;
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}
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int json_path_set_new(json_t *json, const char *path, json_t *value, size_t flags, json_error_t *error)
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{
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static const char root_chr = '$', array_open = '[', object_delim = '.';
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static const char * const path_delims = ".[", *array_close = "]";
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json_t *cursor, *parent = NULL;
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char *token, *buf = NULL, *peek, delim = '\0';
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const char *expect;
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int index_saved = -1;
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jsonp_error_init(error, "<path>");
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if (!json || !path || flags || !value) {
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jsonp_error_set(error, -1, -1, 0, json_error_invalid_argument, "invalid argument");
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goto fail;
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} else {
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buf = jsonp_strdup(path);
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}
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if (buf[0] != root_chr) {
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jsonp_error_set(error, -1, -1, 0, json_error_invalid_format, "path should start with $");
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goto fail;
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}
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peek = buf + 1;
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cursor = json;
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token = NULL;
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expect = path_delims;
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while (peek && *peek && cursor)
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{
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char *last_peek = peek;
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peek = strpbrk(last_peek, expect);
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if (peek) {
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if (!token && peek != last_peek) {
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jsonp_error_set(error, -1, -1, last_peek - buf, json_error_invalid_format, "unexpected trailing chars");
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goto fail;
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}
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delim = *peek;
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*peek++ = '\0';
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} else { // end of path
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if (expect == path_delims) {
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break;
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} else {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_invalid_format, "missing ']'?");
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goto fail;
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}
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}
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if (expect == path_delims) {
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if (token) {
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if (token[0] == '\0') {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_invalid_format, "empty token");
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goto fail;
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}
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parent = cursor;
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cursor = json_object_get(parent, token);
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if (!cursor) {
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if (!json_is_object(parent)) {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "object expected");
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goto fail;
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}
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if (delim == object_delim) {
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cursor = json_object();
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json_object_set_new(parent, token, cursor);
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} else {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "new array is not allowed");
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goto fail;
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}
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}
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}
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expect = (delim == array_open ? array_close : path_delims);
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token = peek;
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} else if (expect == array_close) {
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char *endptr;
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size_t index;
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parent = cursor;
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if (!json_is_array(parent)) {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "array expected");
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goto fail;
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}
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index = strtol(token, &endptr, 0);
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if (*endptr) {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "invalid array index");
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goto fail;
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}
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cursor = json_array_get(parent, index);
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if (!cursor) {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "array index out of bound");
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goto fail;
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}
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index_saved = index;
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token = NULL;
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expect = path_delims;
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} else {
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assert(1);
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jsonp_error_set(error, -1, -1, peek - buf, json_error_unknown, "unexpected error in path move");
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goto fail;
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}
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}
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if (token) {
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if (json_is_object(cursor)) {
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json_object_set(cursor, token, value);
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} else {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "object expected");
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goto fail;
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}
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cursor = json_object_get(cursor, token);
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} else if (index_saved != -1 && json_is_array(parent)) {
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json_array_set(parent, index_saved, value);
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cursor = json_array_get(parent, index_saved);
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} else {
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jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "invalid path");
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goto fail;
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}
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json_decref(value);
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jsonp_free(buf);
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return 0;
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fail:
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json_decref(value);
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jsonp_free(buf);
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return -1;
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}
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