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emrtd: Continue work on supporting non-BAC passports

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Ave 2020-12-14 18:05:45 +03:00
parent eaea632eb3
commit 0bca61aa99
1 changed files with 81 additions and 73 deletions
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154
client/src/cmdhfemrtd.c
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@ -379,7 +379,7 @@ static void _convert_filename(const char *file, uint8_t *dataout) {
dataout[1] = (int)strtol(temp, NULL, 16);
}
static bool secure_select_file(uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, const char *file, bool use_14b) {
static bool secure_select_file(uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, const char *select_by, const char *file, bool use_14b) {
uint8_t response[PM3_CMD_DATA_SIZE];
int resplen = 0;
@ -391,7 +391,7 @@ static bool secure_select_file(uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, const
char command[54];
uint8_t cmd[8];
uint8_t data[21];
uint8_t temp[8] = {0x0c, 0xa4, 0x02, 0x0c};
uint8_t temp[8] = {0x0c, 0xa4, strtol(select_by, NULL, 16), 0x0c};
int cmdlen = pad_block(temp, 4, cmd);
int datalen = pad_block(file_id, 2, data);
@ -431,7 +431,7 @@ static bool secure_select_file(uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, const
memcpy(data + (datalen + 3), do8e, 10);
PrintAndLogEx(DEBUG, "data: %s", sprint_hex_inrow(data, lc));
sprintf(command, "0C%s020C%02X%s00", SELECT, lc, sprint_hex_inrow(data, lc));
sprintf(command, "0C%s%s0C%02X%s00", SELECT, select_by, lc, sprint_hex_inrow(data, lc));
PrintAndLogEx(DEBUG, "command: %s", command);
if (exchange_commands(command, response, &resplen, false, true, use_14b) == false) {
@ -517,7 +517,7 @@ static bool _secure_read_binary_decrypt(uint8_t *kenc, uint8_t *kmac, uint8_t *s
}
static int read_file(uint8_t *dataout, int *dataoutlen, uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, bool use_14b) {
static int read_file(uint8_t *dataout, int *dataoutlen, uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, bool use_secure, bool use_14b) {
uint8_t response[35000];
int resplen = 0;
uint8_t tempresponse[500];
@ -525,12 +525,12 @@ static int read_file(uint8_t *dataout, int *dataoutlen, uint8_t *kenc, uint8_t *
int toread = 4;
int offset = 0;
if (kenc == NULL) {
if (_read_binary(offset, toread, response, &resplen, use_14b) == false) {
if (use_secure == true) {
if (_secure_read_binary_decrypt(kenc, kmac, ssc, offset, toread, response, &resplen, use_14b) == false) {
return false;
}
} else {
if (_secure_read_binary_decrypt(kenc, kmac, ssc, offset, toread, response, &resplen, use_14b) == false) {
if (_read_binary(offset, toread, response, &resplen, use_14b) == false) {
return false;
}
}
@ -678,19 +678,31 @@ static bool file_tag_to_file_id(uint8_t *datain, char *filenameout, char *dataou
return true;
}
static bool dump_file(uint8_t *ks_enc, uint8_t *ks_mac, uint8_t *ssc, const char *file, const char *name, bool use_14b) {
static bool select_and_read(uint8_t *dataout, int *dataoutlen, const char *file, uint8_t *ks_enc, uint8_t *ks_mac, uint8_t *ssc, bool use_secure, bool use_14b) {
if (use_secure == true) {
if (secure_select_file(ks_enc, ks_mac, ssc, P1_SELECT_BY_EF, file, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to secure select %s.", file);
return false;
}
} else {
if (select_file(P1_SELECT_BY_EF, file, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to select %s.", file);
return false;
}
}
if (read_file(dataout, dataoutlen, ks_enc, ks_mac, ssc, use_secure, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to read %s.", file);
return false;
}
return true;
}
static bool dump_file(uint8_t *ks_enc, uint8_t *ks_mac, uint8_t *ssc, const char *file, const char *name, bool use_secure, bool use_14b) {
uint8_t response[35000];
int resplen = 0;
if (secure_select_file(ks_enc, ks_mac, ssc, file, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to secure select %s, crypto checksum check failed.", name);
DropField();
return false;
}
if (read_file(response, &resplen, ks_enc, ks_mac, ssc, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to read %s.", name);
DropField();
if (select_and_read(response, &resplen, file, ks_enc, ks_mac, ssc, use_secure, use_14b) == false) {
return false;
}
@ -709,17 +721,12 @@ static void rng(int length, uint8_t *dataout) {
}
int dumpHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
uint8_t response[25000];
uint8_t rnd_ic[8];
uint8_t kenc[50];
uint8_t kmac[50];
uint8_t response[35000] = { 0x00 };
uint8_t ssc[8] = { 0x00 };
uint8_t ks_enc[16] = { 0x00 };
uint8_t ks_mac[16] = { 0x00 };
int resplen = 0;
bool BAC = false;
uint8_t S[32];
uint8_t rnd_ifd[8], k_ifd[16];
rng(8, rnd_ifd);
rng(16, k_ifd);
bool use_14b = false;
// Try to 14a
@ -751,7 +758,7 @@ int dumpHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
// Select and read EF_CardAccess
if (select_file(P1_SELECT_BY_EF, EF_CARDACCESS, use_14b)) {
read_file(response, &resplen, NULL, NULL, NULL, use_14b);
read_file(response, &resplen, NULL, NULL, NULL, false, use_14b);
PrintAndLogEx(INFO, "Read EF_CardAccess, len: %i.", resplen);
PrintAndLogEx(DEBUG, "Contents (may be incomplete over 2k chars): %s", sprint_hex_inrow(response, resplen));
} else {
@ -774,7 +781,7 @@ int dumpHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
// Select EF_DG1
select_file(P1_SELECT_BY_EF, EF_DG1, use_14b);
if (read_file(response, &resplen, NULL, NULL, NULL, use_14b) == false) {
if (read_file(response, &resplen, NULL, NULL, NULL, false, use_14b) == false) {
BAC = true;
PrintAndLogEx(INFO, "Basic Access Control is enforced. Will attempt external authentication.");
} else {
@ -784,7 +791,16 @@ int dumpHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
}
if (BAC) {
// TODO: account for the case of no BAC
uint8_t rnd_ic[8] = { 0x00 };
uint8_t kenc[50] = { 0x00 };
uint8_t kmac[50] = { 0x00 };
uint8_t k_icc[16] = { 0x00 };
uint8_t S[32] = { 0x00 };
uint8_t rnd_ifd[8], k_ifd[16];
rng(8, rnd_ifd);
rng(16, k_ifd);
PrintAndLogEx(DEBUG, "doc: %s", documentnumber);
PrintAndLogEx(DEBUG, "dob: %s", dob);
PrintAndLogEx(DEBUG, "exp: %s", expiry);
@ -853,10 +869,6 @@ int dumpHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
return PM3_ESOFT;
}
uint8_t ssc[8] = { 0x00 };
uint8_t ks_enc[16] = { 0x00 };
uint8_t ks_mac[16] = { 0x00 };
uint8_t k_icc[16] = { 0x00 };
memcpy(k_icc, dec_output + 16, 16);
// Calculate session keys
@ -876,48 +888,44 @@ int dumpHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
memcpy(ssc + 4, rnd_ifd + 4, 4);
PrintAndLogEx(DEBUG, "ssc: %s", sprint_hex_inrow(ssc, 8));
// Select EF_COM
if (secure_select_file(ks_enc, ks_mac, ssc, EF_COM, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to secure select EF_COM.");
DropField();
return PM3_ESOFT;
}
if (read_file(response, &resplen, ks_enc, ks_mac, ssc, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to read EF_COM.");
DropField();
return PM3_ESOFT;
}
PrintAndLogEx(INFO, "Read EF_COM, len: %i.", resplen);
PrintAndLogEx(DEBUG, "Contents (may be incomplete over 2k chars): %s", sprint_hex_inrow(response, resplen));
saveFile("EF_COM", ".BIN", response, resplen);
uint8_t filelist[50];
int filelistlen = 0;
if (ef_com_get_file_list(response, &resplen, filelist, &filelistlen) == false) {
PrintAndLogEx(ERR, "Failed to read file list from EF_COM.");
DropField();
return PM3_ESOFT;
}
PrintAndLogEx(DEBUG, "File List: %s", sprint_hex_inrow(filelist, filelistlen));
for (int i = 0; i < filelistlen; i++) {
char file_id[5] = {0x00};
char file_name[8] = {0x00};
if (file_tag_to_file_id(&filelist[i], file_name, file_id) == false) {
PrintAndLogEx(INFO, "File tag not found, skipping: %02X", filelist[i]);
continue;
}
PrintAndLogEx(DEBUG, "Current file: %s", file_name);
dump_file(ks_enc, ks_mac, ssc, file_id, file_name, use_14b);
}
dump_file(ks_enc, ks_mac, ssc, EF_SOD, "EF_SOD", use_14b);
}
// Select EF_COM
if (select_and_read(response, &resplen, EF_COM, ks_enc, ks_mac, ssc, BAC, use_14b) == false) {
PrintAndLogEx(ERR, "Failed to read EF_COM.");
DropField();
return PM3_ESOFT;
}
PrintAndLogEx(INFO, "Read EF_COM, len: %i.", resplen);
PrintAndLogEx(DEBUG, "Contents (may be incomplete over 2k chars): %s", sprint_hex_inrow(response, resplen));
saveFile("EF_COM", ".BIN", response, resplen);
uint8_t filelist[50];
int filelistlen = 0;
if (ef_com_get_file_list(response, &resplen, filelist, &filelistlen) == false) {
PrintAndLogEx(ERR, "Failed to read file list from EF_COM.");
DropField();
return PM3_ESOFT;
}
PrintAndLogEx(DEBUG, "File List: %s", sprint_hex_inrow(filelist, filelistlen));
// Dump all files in the file list
for (int i = 0; i < filelistlen; i++) {
char file_id[5] = { 0x00 };
char file_name[8] = { 0x00 };
if (file_tag_to_file_id(&filelist[i], file_name, file_id) == false) {
PrintAndLogEx(INFO, "File tag not found, skipping: %02X", filelist[i]);
continue;
}
PrintAndLogEx(DEBUG, "Current file: %s", file_name);
dump_file(ks_enc, ks_mac, ssc, file_id, file_name, BAC, use_14b);
}
// Dump EF_SOD
dump_file(ks_enc, ks_mac, ssc, EF_SOD, "EF_SOD", BAC, use_14b);
DropField();
return PM3_SUCCESS;
}