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fix emrtd info offline bug

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This commit is contained in:
Philippe Teuwen 2020-12-19 00:59:27 +01:00
parent 7a9e129ad9
commit bdcf84f90d
1 changed files with 17 additions and 18 deletions
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35
client/src/cmdhfemrtd.c
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@ -568,14 +568,14 @@ static int emrtd_read_file(uint8_t *dataout, int *dataoutlen, uint8_t *kenc, uin
return true;
}
static bool emrtd_lds_get_data_by_tag(uint8_t *datain, int *datainlen, uint8_t *dataout, int *dataoutlen, int tag1, int tag2, bool twobytetag) {
static bool emrtd_lds_get_data_by_tag(uint8_t *datain, int datainlen, uint8_t *dataout, int *dataoutlen, int tag1, int tag2, bool twobytetag) {
int offset = 1;
offset += emrtd_get_asn1_field_length(datain, *datainlen, offset);
offset += emrtd_get_asn1_field_length(datain, datainlen, offset);
int e_idlen = 0;
int e_datalen = 0;
int e_fieldlen = 0;
while (offset < *datainlen) {
while (offset < datainlen) {
PrintAndLogEx(DEBUG, "emrtd_lds_get_data_by_tag, offset: %i, data: %X", offset, *(datain + offset));
// Determine element ID length to set as offset on asn1datalength
if ((*(datain + offset) == 0x5F) || (*(datain + offset) == 0x7F)) {
@ -585,14 +585,14 @@ static bool emrtd_lds_get_data_by_tag(uint8_t *datain, int *datainlen, uint8_t *
}
// Get the length of the element
e_datalen = emrtd_get_asn1_data_length(datain + offset, *datainlen - offset, e_idlen);
e_datalen = emrtd_get_asn1_data_length(datain + offset, datainlen - offset, e_idlen);
// Get the length of the element's length
e_fieldlen = emrtd_get_asn1_field_length(datain + offset, *datainlen - offset, e_idlen);
e_fieldlen = emrtd_get_asn1_field_length(datain + offset, datainlen - offset, e_idlen);
// If the element is what we're looking for, get the data and return true
if (*(datain + offset) == tag1 && (!twobytetag || *(datain + offset + 1) == tag2)) {
if (*datainlen > e_datalen) {
if (datainlen > e_datalen) {
*dataoutlen = e_datalen;
memcpy(dataout, datain + offset + e_idlen + e_fieldlen, e_datalen);
return true;
@ -741,7 +741,7 @@ static bool emrtd_dump_ef_dg5(uint8_t *file_contents, int file_length) {
int datalen = 0;
// If we can't find image in EF_DG5, return false.
if (emrtd_lds_get_data_by_tag(file_contents, &file_length, data, &datalen, 0x5F, 0x40, true) == false) {
if (emrtd_lds_get_data_by_tag(file_contents, file_length, data, &datalen, 0x5F, 0x40, true) == false) {
return false;
}
@ -1013,7 +1013,7 @@ int dumpHF_EMRTD(char *documentnumber, char *dob, char *expiry, bool BAC_availab
uint8_t filelist[50];
int filelistlen = 0;
if (!emrtd_lds_get_data_by_tag(response, &resplen, filelist, &filelistlen, 0x5c, 0x00, false)) {
if (!emrtd_lds_get_data_by_tag(response, resplen, filelist, &filelistlen, 0x5c, 0x00, false)) {
PrintAndLogEx(ERR, "Failed to read file list from EF_COM.");
DropField();
return PM3_ESOFT;
@ -1210,7 +1210,7 @@ static bool emrtd_print_ef_dg1_info(uint8_t *response, int resplen) {
char mrz[90] = { 0x00 };
int mrzlen = 0;
if (!emrtd_lds_get_data_by_tag(response, &resplen, (uint8_t *) mrz, &mrzlen, 0x5f, 0x1f, true)) {
if (!emrtd_lds_get_data_by_tag(response, resplen, (uint8_t *) mrz, &mrzlen, 0x5f, 0x1f, true)) {
PrintAndLogEx(ERR, "Failed to read MRZ from EF_DG1.");
return false;
}
@ -1292,13 +1292,13 @@ static bool emrtd_print_ef_dg11_info(uint8_t *response, int resplen) {
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(INFO, "-------------------- " _CYAN_("EF_DG11") " -------------------");
if (!emrtd_lds_get_data_by_tag(response, &resplen, taglist, &taglistlen, 0x5c, 0x00, false)) {
if (!emrtd_lds_get_data_by_tag(response, resplen, taglist, &taglistlen, 0x5c, 0x00, false)) {
PrintAndLogEx(ERR, "Failed to read file list from EF_DG11.");
return false;
}
for (int i = 0; i < taglistlen; i++) {
emrtd_lds_get_data_by_tag(response, &resplen, tagdata, &tagdatalen, taglist[i], taglist[i + 1], taglist[i] == 0x5f);
emrtd_lds_get_data_by_tag(response, resplen, tagdata, &tagdatalen, taglist[i], taglist[i + 1], taglist[i] == 0x5f);
// Special behavior for two char tags
if (taglist[i] == 0x5f) {
switch (taglist[i + 1]) {
@ -1364,13 +1364,13 @@ static bool emrtd_print_ef_dg12_info(uint8_t *response, int resplen) {
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(INFO, "-------------------- " _CYAN_("EF_DG12") " -------------------");
if (!emrtd_lds_get_data_by_tag(response, &resplen, taglist, &taglistlen, 0x5c, 0x00, false)) {
if (!emrtd_lds_get_data_by_tag(response, resplen, taglist, &taglistlen, 0x5c, 0x00, false)) {
PrintAndLogEx(ERR, "Failed to read file list from EF_DG12.");
return false;
}
for (int i = 0; i < taglistlen; i++) {
emrtd_lds_get_data_by_tag(response, &resplen, tagdata, &tagdatalen, taglist[i], taglist[i + 1], taglist[i] == 0x5f);
emrtd_lds_get_data_by_tag(response, resplen, tagdata, &tagdatalen, taglist[i], taglist[i + 1], taglist[i] == 0x5f);
// Special behavior for two char tags
if (taglist[i] == 0x5f) {
// Several things here are longer than the rest but I can't think of a way to shorten them
@ -1452,7 +1452,7 @@ int infoHF_EMRTD(char *documentnumber, char *dob, char *expiry, bool BAC_availab
uint8_t filelist[50];
int filelistlen = 0;
if (!emrtd_lds_get_data_by_tag(response, &resplen, filelist, &filelistlen, 0x5c, 0x00, false)) {
if (!emrtd_lds_get_data_by_tag(response, resplen, filelist, &filelistlen, 0x5c, 0x00, false)) {
PrintAndLogEx(ERR, "Failed to read file list from EF_COM.");
DropField();
return PM3_ESOFT;
@ -1482,7 +1482,7 @@ int infoHF_EMRTD(char *documentnumber, char *dob, char *expiry, bool BAC_availab
int infoHF_EMRTD_offline(const char *path) {
uint8_t *data;
int datalen = 0;
size_t datalen = 0;
char *filepath = calloc(strlen(path) + 100, sizeof(char));
if (filepath == NULL)
return PM3_EMALLOC;
@ -1497,7 +1497,7 @@ int infoHF_EMRTD_offline(const char *path) {
}
uint8_t filelist[50];
int filelistlen = 0;
int res = emrtd_lds_get_data_by_tag(data, &datalen, filelist, &filelistlen, 0x5c, 0x00, false);
int res = emrtd_lds_get_data_by_tag(data, datalen, filelist, &filelistlen, 0x5c, 0x00, false);
free(data);
if (!res) {
PrintAndLogEx(ERR, "Failed to read file list from EF_COM.");
@ -1513,7 +1513,6 @@ int infoHF_EMRTD_offline(const char *path) {
PrintAndLogEx(DEBUG, "File tag not found, skipping: %02X", filelist[i]);
continue;
}
if (strcmp(file_name, "EF_DG1") == 0) {
strcpy(filepath, path);
strncat(filepath, PATHSEP, 1);
@ -1639,7 +1638,7 @@ static int cmd_hf_emrtd_info(const char *Cmd) {
arg_str0("n", "documentnumber", "<alphanum>", "document number, up to 9 chars"),
arg_str0("d", "dateofbirth", "<YYMMDD>", "date of birth in YYMMDD format"),
arg_str0("e", "expiry", "<YYMMDD>", "expiry in YYMMDD format"),
arg_str0("p", "path", "<dirpath>", "display info from offline dump stored in dirpath"),
arg_str0(NULL, "path", "<dirpath>", "display info from offline dump stored in dirpath"),
arg_param_end
};
CLIExecWithReturn(ctx, Cmd, argtable, true);