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emrtd: calculate S and e_ifd

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Ave 2020-12-09 04:48:17 +03:00
parent a7478443b3
commit 69be5f8b25
1 changed files with 37 additions and 6 deletions
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43
client/src/cmdhfemrtd.c
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@ -8,6 +8,8 @@
// High frequency Electronic Machine Readable Travel Document commands
//-----------------------------------------------------------------------------
// This code is heavily based on mrpkey.py of RFIDIOt
#include "cmdhfemrtd.h"
#include <ctype.h>
#include "fileutils.h"
@ -27,6 +29,7 @@
// ISO7816 commands
#define SELECT "A4"
#define EXTERNAL_AUTHENTICATE "82"
#define GET_CHALLENGE "84"
#define READ_BINARY "B0"
#define P1_SELECT_BY_EF "02"
@ -241,14 +244,18 @@ static int read_file(uint8_t *dataout, int *dataoutlen) {
int infoHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
uint8_t response[PM3_CMD_DATA_SIZE];
uint8_t challenge[8];
// TODO: get these _types into a better spot
uint8_t KENC_type[4] = {0x00, 0x00, 0x00, 0x01};
uint8_t KMAC_type[4] = {0x00, 0x00, 0x00, 0x02};
uint8_t rnd_ic[8];
uint8_t kenc[50];
uint8_t kmac[50];
int resplen = 0;
// bool BAC = true;
uint8_t S[32];
// TODO: Code sponsored jointly by duracell and sony
uint8_t rnd_ifd[8] = {0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA};
uint8_t k_ifd[16] = {0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA};
// TODO: get these _types into a better spot
uint8_t KENC_type[4] = {0x00, 0x00, 0x00, 0x01};
uint8_t KMAC_type[4] = {0x00, 0x00, 0x00, 0x02};
// Select and read EF_CardAccess
if (select_file(P1_SELECT_BY_EF, EF_CARDACCESS, true, true)) {
@ -304,12 +311,36 @@ int infoHF_EMRTD(char *documentnumber, char *dob, char *expiry) {
PrintAndLogEx(INFO, "kmac: %s", sprint_hex_inrow(kmac, 16));
// Get Challenge
if (get_challenge(8, challenge, &resplen) == false) {
if (get_challenge(8, rnd_ic, &resplen) == false) {
PrintAndLogEx(ERR, "Couldn't get challenge.");
DropField();
return PM3_ESOFT;
}
PrintAndLogEx(INFO, "challenge: %s", sprint_hex_inrow(challenge, 8));
PrintAndLogEx(INFO, "rnd_ic: %s", sprint_hex_inrow(rnd_ic, 8));
memcpy(S, rnd_ifd, 8);
memcpy(S + 8, rnd_ic, 8);
memcpy(S + 16, k_ifd, 16);
mbedtls_des3_context ctx;
mbedtls_des3_set2key_enc(&ctx, kenc);
uint8_t iv[8] = { 0x00 };
uint8_t e_ifd[8] = { 0x00 };
mbedtls_des3_crypt_cbc(&ctx // des3_context
, MBEDTLS_DES_ENCRYPT // int mode
, sizeof(S) // length
, iv // iv[8]
, S // input
, e_ifd // output
);
// TODO: get m_ifd by ISO 9797-1 Algo 3(e_ifd, m_mac)
// TODO: get cmd_data by e_ifd + m_ifd
// TODO: iso_7816_external_authenticate(passport.ToHex(cmd_data),Kmac)
PrintAndLogEx(INFO, "S: %s", sprint_hex_inrow(S, 32));
DropField();
return PM3_SUCCESS;