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main.c
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/*
Warning: extremly ugly code
*/
/*
* Validity90 Prototype
* Copyright (C) 2017-2018 Nikita Mikhailov <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdbool.h>
#include <libusb.h>
#include <stdlib.h>
#include <string.h>
#include <nss.h>
#include <keyhi.h>
#include <keythi.h>
#include <secoid.h>
#include <secmodt.h>
#include <sechash.h>
#include <pk11pub.h>
#include <err.h>
#include <errno.h>
#include <openssl/ec.h>
#include <openssl/evp.h>
#include <openssl/obj_mac.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/aes.h>
#include <openssl/ssl.h>
#include <openssl/tls1.h>
#include <openssl/ecdh.h>
#include <png.h>
#include "constants.h"
#include "validity90/validity90.h"
#include "validity90/utils.h"
#define xstr(a) str(a)
#define str(a) #a
#define max(a,b) (a > b ? a : b)
#define min(a,b) (a > b ? b : a)
#define err(x) res_err(x, xstr(x))
#define errb(x) res_errb(x, xstr(x))
#define byte guint8
typedef struct DeviceInfo {
guint16 vid;
guint16 pid;
guint hasLed;
guint hasBios;
guint requiresReset;
guint hasRawOutput;
gboolean unsupported;
gchar *description;
} DeviceInfo;
DeviceInfo all_devices[] = {
{ .vid = 0x138a, .pid = 0x0090, .hasLed = 1, .hasBios = 1, .requiresReset = 0, .hasRawOutput = 1 },
{ .vid = 0x138a, .pid = 0x0097, .hasLed = 1, .hasBios = 1, .requiresReset = 0, .hasRawOutput = 0 },
{ .vid = 0x138a, .pid = 0x0094, .hasLed = 0, .hasBios = 0, .requiresReset = 1, .hasRawOutput = 1, .unsupported = 1, .description = "Support would be available soon" },
{ .vid = 0x06cb, .pid = 0x0081, .hasLed = -1, .hasBios = -1, .requiresReset = 1, .hasRawOutput = -1, .unsupported = 1, .description = "Support would be available soon" },
{ .vid = 0x06cb, .pid = 0x009a, .hasLed = 1, .hasBios = -1, .requiresReset = 0, .hasRawOutput = -1 },
{ .vid = 0x138a, .pid = 0x0091, .unsupported = 1, .description = "Won't be supported, check README" },
};
static libusb_device_handle * dev;
int idProduct = 0;
static const byte client_random[] = {
0x95, 0x6c, 0x41, 0xa9, 0x12, 0x86, 0x8a, 0xda,
0x9b, 0xb2, 0x5b, 0xb4, 0xbb, 0xd6, 0x1d, 0xde,
0x4f, 0xda, 0x23, 0x2a, 0x74, 0x7b, 0x2a, 0x93,
0xf8, 0xac, 0xc6, 0x69, 0x24, 0x70, 0xc4, 0x2a
};
byte server_random[0x40];
void print_hex_gn(byte* data, int len, int sz) {
for (int i = 0; i < len; i++) {
if ((i % 16) == 0) {
if (i != 0) {
printf("\n");
}
printf("%04x ", i);
} else if ((i % 8) == 0) {
printf(" ");
}
printf("%02x ", data[i * sz]);
}
puts("");
}
void print_hex_string(byte* data, int len) {
for (int i = 0; i < len; i++) {
printf("%02x", data[i]);
}
puts("");
}
void print_hex(byte* data, int len) {
print_hex_gn(data, len, 1);
}
void print_hex_dw(dword* data, int len) {
print_hex_gn(data, len, 4);
}
bool compare(byte * data1, int data_len, dword * expected, int exp_len) {
bool fail = false;
if (data_len != exp_len) {
printf("Expected len: %d, but got %d\n", exp_len, data_len);
fail = true;
} else {
for (int i = 0; i < data_len; i++) {
if (data1[i] != expected[i] && !(expected[i] & MASK_VARIABLE)) {
printf("Expected at char %03x\n", i);
fail = true;
break;
}
}
}
if (fail) {
/*puts("Expected:");
print_hex_dw(expected, exp_len);
puts("Got:");
print_hex(data1, data_len);*/
}
return data_len == exp_len;
}
void res_err(int result, char* where) {
if (result != 0) {
printf("Failed '%s': %d - %s\n", where, result, libusb_error_name(result));
exit(0);
}
}
void res_errb(int result, char* where) {
if (result != 1) {
printf("Failed '%s': %d - %s\n", where, result, libusb_error_name(result));
ERR_print_errors_fp(stderr);
exit(0);
}
}
void qwrite(byte * data, int len) {
int send;
err(libusb_bulk_transfer(dev, 0x01, data, len, &send, 10000));
puts("usb write:");
print_hex(data, len);
}
void qread(byte * data, int len, int *out_len) {
err(libusb_bulk_transfer(dev, 0x81, data, len, out_len, 10000));
puts("usb read:");
print_hex(data, *out_len);
}
static byte pubkey1[0x40];
static byte ecdsa_private_key[0x60];
static char masterkey_aes[0x20];
byte system_serial[1024];
int system_serial_len;
void loadBiosData() {
char name[1024], serial[1024];
FILE *nameFile, *serialFile;
if (!(nameFile = fopen("/sys/class/dmi/id/product_name", "r"))) {
perror("Can't open /sys/class/dmi/id/product_name");
exit(EXIT_FAILURE);
}
if (!(serialFile = fopen("/sys/class/dmi/id/product_serial", "r"))) {
perror("Can't open /sys/class/dmi/id/product_serial");
exit(EXIT_FAILURE);
}
fscanf(nameFile, "%s", name);
fscanf(serialFile, "%s", serial);
int len1 = strlen(name), len2 = strlen(serial);
memcpy(system_serial, name, len1 + 1);
memcpy(system_serial + len1 + 1, serial, len2 + 1);
system_serial_len = len1 + len2 + 2;
fclose(nameFile);
fclose(serialFile);
}
bool do_step(byte *data, int data_len, byte *buff, int *buf_len, byte *expected, int expected_len)
{
qwrite(data, data_len);
qread(buff, 1024 * 1024, buf_len);
return compare(buff, *buf_len, expected, expected_len);
}
#define STEP(a,b) do_step(a, sizeof(a) / sizeof(byte), buff, &len, b, sizeof(b) / sizeof(dword));
void init_keys(const byte *buff, int len) {
byte vbox_serial[] = "VirtualBox\0" "0";
rsp6_info_ptr info = NULL;
GError *error = NULL;
if (!validity90_parse_rsp6(buff, len, vbox_serial, G_N_ELEMENTS(vbox_serial), &info, NULL) &&
!validity90_parse_rsp6(buff, len, system_serial, system_serial_len, &info, &error)) {
printf("Failed to handle RSP6: %s\n", error->message);
exit(-1);
}
memcpy(ecdsa_private_key, info->tls_client_privkey->data, info->tls_client_privkey->len);
memcpy(tls_certificate + 21, info->tls_cert_raw->data, info->tls_cert_raw->len);
memcpy(pubkey1, info->tls_server_pubkey->data, info->tls_server_pubkey->len);
g_byte_array_free_to_bytes(info->tls_cert_raw);
g_byte_array_free_to_bytes(info->tls_client_privkey);
g_byte_array_free_to_bytes(info->tls_server_pubkey);
g_free(info);
fflush(stdout);
}
void init_steps(byte *buff, int len, int *out_len)
{
puts("step 2");STEP(init_sequence_msg2, init_sequence_rsp2);
puts("step 3");STEP(init_sequence_msg3, init_sequence_rsp3);
puts("step 4");STEP(init_sequence_msg4, init_sequence_rsp4);
puts("step 5");STEP(init_sequence_msg5, init_sequence_rsp5);
puts("step 6");STEP(init_sequence_msg6, init_sequence_rsp6);
*out_len = len;
}
void setup() {
int len;
byte buff[1024 * 1024];
byte *keys_buff;
static const byte setup_sequence_msg13[] = { 0x1a };
static const dword setup_sequence_rsp13[] = { 0x00, 0x00 };
puts("step 2");STEP(init_sequence_msg2, init_sequence_rsp2);
print_hex(buff, len);
puts("step 4");STEP(init_sequence_msg4, init_sequence_rsp4);
print_hex(buff, len);
puts("step 5");STEP(init_sequence_msg5, setup_sequence_rsp5);
print_hex(buff, len);
puts("step 6");STEP(setup_sequence_msg6, setup_sequence_rsp6);
print_hex(buff, len);
puts("step 7");STEP(setup_sequence_msg7, setup_sequence_rsp7);
print_hex(buff, len);
puts("step 8");STEP(setup_sequence_msg8, setup_sequence_rsp8);
print_hex(buff, len);
puts("step 9");STEP(setup_sequence_config_data, setup_sequence_config_data_rsp);
print_hex(buff, len);
puts("step 5");STEP(init_sequence_msg5, setup_sequence_rsp5);
print_hex(buff, len);
puts("step 10");STEP(setup_sequence_msg10, setup_sequence_rsp10);
print_hex(buff, len);
puts("step 11");STEP(setup_sequence_msg11, setup_sequence_rsp11);
print_hex(buff, len);
puts("step 12");STEP(setup_sequence_msg12, setup_sequence_rsp12);
print_hex(buff, len);
puts("step 13");STEP(setup_sequence_msg13, setup_sequence_rsp13);
print_hex(buff, len);
// We need to find a way to retrieve ecdsa_private_key, once we've that
// we're all set and we can start a TLS session...
puts("Incomplete reverse engineering");
exit(EXIT_FAILURE);
}
void init() {
int len;
byte buff[1024 * 1024];
puts("step 1");STEP(init_sequence_msg1, init_sequence_rsp1);
if (getenv("FORCE_RESET") != NULL) {
puts("Sending reset commands");
STEP(setup_sequence_config_data, setup_sequence_config_data_rsp);
const byte reset_cmd[] = "\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00";
qwrite(reset_cmd, sizeof(reset_cmd));
qread(buff, sizeof(buff), &len);
print_hex(buff, len);
puts("ACK");
STEP(setup_sequence_completed, setup_sequence_completed_rsp);
print_hex(buff, len);
exit(EXIT_SUCCESS);
}
if (buff[len-1] != 0x07 || getenv("FORCE_SETUP") != NULL) {
printf("Sensor not initialized, init byte is 0x%x (expected 0x02)\n",
buff[len-1]);
setup();
exit(EXIT_FAILURE);
} else {
init_steps(buff, len, &len);
}
init_keys(buff, len);
}
#undef STEP
PK11Context* hmac_make_context(byte *key_bytes, int key_len) {
CK_MECHANISM_TYPE hmacMech = CKM_SHA256_HMAC;
PK11SlotInfo *slot = PK11_GetBestSlot(hmacMech, NULL);
SECItem key;
key.data = key_bytes;
key.len = key_len;
PK11SymKey *pkKey = PK11_ImportSymKey(slot, hmacMech, PK11_OriginUnwrap, CKA_SIGN, &key, NULL);
SECItem param = { .type = siBuffer, .data = NULL, .len = 0 };
PK11Context* context = PK11_CreateContextBySymKey(hmacMech, CKA_SIGN, pkKey, ¶m);
PK11_DigestBegin(context);
return context;
}
byte* hmac_compute(byte *key, int key_len, byte* data, int data_len) {
PK11Context* context = hmac_make_context(key, key_len);
PK11_DigestOp(context, data, data_len);
byte *res = malloc(0x20);
int len = 0x20;
PK11_DigestFinal(context, res, &len, 0x20);
PK11_DestroyContext(context, PR_TRUE);
return res;
}
//10
static const byte privkey1[] = {
0x1d, 0xd8, 0x36, 0x68, 0xe9, 0xb0, 0x7b, 0x93, 0x12, 0x38, 0x31, 0x23, 0x90, 0xc8, 0x87, 0xca,
0xdb, 0x82, 0x27, 0x39, 0xde, 0x7b, 0x43, 0xd2, 0x23, 0xd7, 0xcd, 0xd1, 0x3c, 0x77, 0x0e, 0xd2,
0xd1, 0x93, 0x70, 0x02, 0xaf, 0x3b, 0x18, 0x47, 0xc5, 0x30, 0x4c, 0x33, 0x60, 0xcf, 0xbf, 0xc5,
0x9b, 0x3c, 0x67, 0xd9, 0x45, 0x06, 0x38, 0xda, 0x92, 0xbe, 0x65, 0xbf, 0x81, 0x8c, 0xaa, 0x7e,
0x20, 0x14, 0x3b, 0x7b, 0x62, 0x64, 0x90, 0x07, 0x54, 0x4e, 0x7a, 0x98, 0xf9, 0x81, 0xbe, 0xc1,
0xf2, 0x1f, 0x9a, 0x29, 0x65, 0xb6, 0xcc, 0x29, 0x0c, 0x45, 0xd3, 0x87, 0xae, 0xbf, 0xa4, 0xd9
};
//11
/*
static const byte privkey1[] = {
0x65, 0xd7, 0xf7, 0x6f, 0xf2, 0x94, 0xe4, 0xe9, 0xd8, 0xae, 0xc5, 0x79, 0x8d, 0x77, 0x3b, 0xb1,
0xad, 0xd4, 0xe7, 0xf2, 0xbd, 0x09, 0x64, 0xa7, 0xd9, 0x9c, 0xeb, 0x50, 0x33, 0x56, 0xbb, 0x3e,
0xcb, 0x1c, 0x62, 0xfc, 0x40, 0x60, 0xbf, 0xd2, 0xd8, 0x7b, 0xc9, 0x3f, 0xdc, 0x4c, 0xc7, 0xab,
0xb3, 0xfe, 0x3a, 0x25, 0x8c, 0x35, 0xa1, 0x2f, 0x8e, 0x67, 0xe3, 0x89, 0xc7, 0x6a, 0x32, 0xf4,
0xfd, 0x01, 0x93, 0x3c, 0xd8, 0x18, 0x9d, 0x65, 0x9c, 0x41, 0xd3, 0xbe, 0x6e, 0xcb, 0x8b, 0x08,
0x58, 0x0a, 0xae, 0x80, 0xb4, 0x2d, 0xd0, 0xb5, 0x54, 0x81, 0x89, 0x91, 0xd0, 0x68, 0xb0, 0x26
};*/
EC_KEY * load_key(byte *data, bool is_private) {
BIGNUM *x = BN_bin2bn(data, 0x20, NULL);
BIGNUM *y = BN_bin2bn(data + 0x20, 0x20, NULL);
BIGNUM *d = NULL;
EC_KEY *key = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
if (!EC_KEY_set_public_key_affine_coordinates(key, x, y)) {
goto err;
}
if (is_private) {
d = BN_bin2bn(data + 0x40, 0x20, NULL);
if (!EC_KEY_set_private_key(key, d)) {
goto err;
}
}
err(EC_KEY_check_key(key) - 1);
goto clean;
err:
if (key) EC_KEY_free(key);
key = NULL;
ERR_print_errors_fp(stderr);
clean:
if (x) BN_free(x);
if (y) BN_free(y);
if (d) BN_free(d);
return key;
}
EVP_PKEY * load_pkey(byte * data, bool is_private) {
EC_KEY *key = load_key(data, is_private);
EVP_PKEY *priv = EVP_PKEY_new();
if (is_private) {
EVP_PKEY_set1_EC_KEY(priv, key);
} else {
EVP_PKEY_set1_EC_KEY(priv, key);
}
return priv;
}
byte* P_Hash(byte * secret, int key_len, byte * seed, int seed_len) {
byte *a1 = hmac_compute(secret, key_len, seed, seed_len);
byte *a2 = hmac_compute(secret, key_len, a1, 0x20);
byte buff1[seed_len + 0x20];
byte buff2[seed_len + 0x20];
memcpy(buff1, a1, 0x20);
memcpy(buff1 + 0x20, seed, seed_len);
memcpy(buff2, a2, 0x20);
memcpy(buff2 + 0x20, seed, seed_len);
byte * val1 = hmac_compute(secret, key_len, buff1, seed_len + 0x20);
byte * val2 = hmac_compute(secret, key_len, buff2, seed_len + 0x20);
byte * data = malloc(0x30);
memcpy(data, val1, 0x20);
memcpy(data + 0x20, val2, 0x10);
return data;
}
void print_hex_C(FILE *f, byte* data, int len) {
fprintf(f, " = {\n");
for (int i = 0; i < len; i++) {
if ((i % 16) == 0) {
if (i != 0) {
fprintf(f, "\n");
}
fprintf(f, " ");
}
fprintf(f, "0x%02x, ", data[i]);
}
fprintf(f, "\n};\n");
}
byte all_messages[1024 * 1024]; int all_messages_index = 0;
void HUpdate(HASHContext *context, const unsigned char *src, unsigned int len) {
HASH_Update(context, src, len);
memcpy(all_messages + all_messages_index, src, len);
all_messages_index += len;
// puts("HASHING>>>");
// print_hex(src, len);
// puts("HASHING<<");
}
guint8 key_block[0x120];
void mac_then_encrypt(byte type, byte * data, int data_len, byte **res, int *res_len) {
byte iv[0x10] = {0x4b, 0x77, 0x62, 0xff, 0xa9, 0x03, 0xc1, 0x1e, 0x6f, 0xd8, 0x35, 0x93, 0x17, 0x2d, 0x54, 0xef};
int prefix_len = 5;
if (type == 0xFF) {
prefix_len = 0;
}
// header for hmac + data + hmac
byte all_data[prefix_len + data_len + 0x20];
all_data[0] = type; all_data[1] = all_data[2] = 0x03; all_data[3] = (data_len >> 8) & 0xFF; all_data[4] = data_len & 0xFF;
memcpy(all_data + prefix_len, data, data_len);
memcpy(all_data + prefix_len + data_len, hmac_compute(key_block + 0x00, 0x20, all_data, prefix_len + data_len), 0x20);
EVP_CIPHER_CTX *context = EVP_CIPHER_CTX_new();
EVP_EncryptInit(context, EVP_aes_256_cbc(), key_block + 0x40, iv);
EVP_CIPHER_CTX_set_padding(context, 0);
*res_len = ((data_len + 16) / 16) * 16 + 0x30;
*res = malloc(*res_len);
memcpy(*res, iv, 0x10);
int written = 0, wr2, wr3 = 0;
// puts("To encrypt & mac:");
// print_hex(data, data_len);
EVP_EncryptUpdate(context, *res + 0x10, &written, all_data + prefix_len, data_len + 0x20);
// printf("enc written: %02x\n", written);
int pad_len = *res_len - (0x30 + data_len);
if (pad_len == 0) {
pad_len = 16;
}
byte pad[pad_len];
memset(pad, pad_len - 1, pad_len);
EVP_EncryptUpdate(context, *res + 0x10 + written, &wr3, pad, pad_len);
EVP_EncryptFinal(context, *res + 0x10 + written + wr3, &wr2);
// printf("enc written: %02x\n", wr2);
*res_len = written + wr2 + wr3 + 0x10;
// print_hex(all_data + prefix_len, data_len + 0x20);
// puts("Encrypted& hmac");
// print_hex(*res, *res_len);
EVP_CIPHER_CTX_free(context);
}
byte *sign(EVP_PKEY* key, byte *data, int data_len) {
// ECDSA_do_sign()
int len5;
int status;
byte * res = NULL;
do {
free(res);
puts("signing...");
EVP_PKEY_CTX *sign_ctx = EVP_PKEY_CTX_new(key, NULL);
status = EVP_PKEY_sign_init(sign_ctx);
status = EVP_PKEY_CTX_set_signature_md(sign_ctx, EVP_sha256());
status = EVP_PKEY_sign(sign_ctx, NULL, &len5, data, data_len);
res = malloc(len5);
status = EVP_PKEY_sign(sign_ctx, res, &len5, data, data_len);
EVP_PKEY_CTX_free(sign_ctx);
} while(len5 != 0x48);
return res;
}
byte *sign2(EC_KEY* key, byte *data, int data_len) {
int len = 0;
byte * res;
do {
ECDSA_SIG *sig = ECDSA_do_sign(data, data_len, key);
len = i2d_ECDSA_SIG(sig, NULL);
res = malloc(len);
byte *f = res;
i2d_ECDSA_SIG(sig, &f);
} while (len != 0x48);
/*
// test check
char packet_bytes[] = {
0x30, 0x46, 0x02, 0x21, 0x00, 0xa3, 0xad, 0xaa, 0x61,
0x00, 0xe6, 0x9d, 0xbd, 0xcf, 0x48, 0x73, 0xb7,
0xa6, 0xed, 0xe3, 0x62, 0x0a, 0x79, 0xe4, 0xf8,
0x14, 0x27, 0x4d, 0xeb, 0x73, 0x91, 0x01, 0x0c,
0xae, 0x08, 0xb9, 0x43, 0x02, 0x21, 0x00, 0xd3,
0x28, 0xa4, 0x86, 0xcf, 0x8b, 0xaf, 0x35, 0xc9,
0x04, 0xf7, 0x1f, 0xe2, 0x56, 0x22, 0xf7, 0x5d,
0xdf, 0x53, 0x13, 0x4f, 0xc6, 0xdb, 0x6b, 0xc0,
0x0d, 0x57, 0x90, 0xc4, 0x23, 0xfe, 0x06
};
char *test = malloc(sizeof(packet_bytes));
memcpy(test, packet_bytes, sizeof(packet_bytes));
char* pp = packet_bytes;
ECDSA_SIG *sig2 = d2i_ECDSA_SIG(NULL, &pp, 0x48);
*/
// int status = ECDSA_do_verify(data, data_len, sig2, load_key(ecdsa_private_key, false));
// printf("Verified: %d", status);
// if (status == 1) {
// return test;
// } else {
// exit(-1);
// }
return res;
}
void handshake() {
int len;
byte *client_hello = malloc(len = sizeof(tls_client_hello) / sizeof(byte));
byte buff[1024 * 1024];
HASHContext *tls_hash_context = HASH_Create(HASH_AlgSHA256);
HASHContext *tls_hash_context2 = HASH_Create(HASH_AlgSHA256);
HASH_Begin(tls_hash_context);
HASH_Begin(tls_hash_context2);
// Send ClientHello
memcpy(client_hello, tls_client_hello, len);
memcpy(client_hello + 0xf, client_random, 0x20);
HUpdate(tls_hash_context, client_hello + 0x09, 0x43);
HUpdate(tls_hash_context2, client_hello + 0x09, 0x43);
qwrite(client_hello, sizeof(tls_client_hello));
// Receive ServerHello
qread(buff, 1024 * 1024, &len);
// SET DEBUG
/*
* 10
* */
/*
memcpy(buff + 0xb, server_random, 0x20);
char packet_bytes[] = {
0x54, 0x4c, 0x53, 0x90, 0x0c, 0xb8, 0x01
};
memcpy(buff + 0x2c, packet_bytes, sizeof(packet_bytes));
*/
/*
*11
*/
/*
char rnd_stat[] = {
0x00, 0x00, 0x67, 0x28, 0x90, 0xb8, 0xb0, 0x9a,
0x24, 0x98, 0x2e, 0x09, 0x7b, 0x8f, 0x03, 0xa8,
0x27, 0x53, 0x79, 0xb2, 0x1f, 0xf3, 0x19, 0xaf,
0x2e, 0xa8, 0xff, 0xea, 0x53, 0x02, 0xa7, 0x38
};
memcpy(buff + 0xb, rnd_stat, 0x20);
char packet_bytes[] = {
0x54, 0x4c, 0x53, 0x90, 0xb8, 0xb0, 0x9a
};
memcpy(buff + 0x2c, packet_bytes, sizeof(packet_bytes));
*/
//
// SET DEBUG END
memcpy(server_random, buff + 0xb, 0x20);
puts("Server tls Random:");
print_hex(server_random, 0x20);
printf("%d", len);
HUpdate(tls_hash_context, buff + 0x05, 0x3d);
HUpdate(tls_hash_context2, buff + 0x05, 0x3d);
// Send cert
EC_KEY *priv_key = load_key(privkey1, true);
EC_KEY *pub_key = load_key(pubkey1, false);
int status;
if (!priv_key || !pub_key) {
puts("failed to load");
return;
}
EVP_PKEY *priv = EVP_PKEY_new(), *pub = EVP_PKEY_new();
status = EVP_PKEY_set1_EC_KEY(priv, priv_key);
status = EVP_PKEY_set1_EC_KEY(pub, pub_key);
EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new(priv, NULL);
status = EVP_PKEY_derive_init(ctx);
status = EVP_PKEY_derive_set_peer(ctx, pub);
size_t len2 = 0;
status = EVP_PKEY_derive(ctx, NULL, &len2);
byte pre_master_secret[len2];
ECDH_compute_key(pre_master_secret, 0x20, EC_KEY_get0_public_key(pub_key), priv_key, NULL);
char seed[0x40], expansion_seed[0x40];
memcpy(seed, client_random, 0x20);
memcpy(seed + 0x20, server_random, 0x20);
memcpy(expansion_seed + 0x20, client_random, 0x20);
memcpy(expansion_seed, server_random, 0x20);
guint8 master_secret[0x30];
validity90_tls_prf(pre_master_secret, 0x20, "master secret", seed, 0x40, 0x30, master_secret, NULL);
puts("master secret");
print_hex(master_secret, 0x30);
validity90_tls_prf(master_secret, 0x30, "key expansion", seed, 0x40, 0x120, key_block, NULL);
puts("keyblock");
print_hex(key_block, 0x120);
// copy client_random to cert
// memcpy(tls_certificate + 0x13, client_random + 0x04, 0x02);
// memcpy(tls_certificate + 0x13, client_random + 0x05, 0x02);
// copy ecdhe pub to key exchange
memcpy(tls_certificate + 0xce + 4, privkey1, 0x40);
HUpdate(tls_hash_context, tls_certificate + 0x09, 0x109);
HUpdate(tls_hash_context2, tls_certificate + 0x09, 0x109);
byte test[0x20];int test_len;
HASH_End(tls_hash_context, test, &test_len, 0x20);
puts("Hash");
print_hex(test, 0x20);
// cert verify
// byte* cert_verify_signature = sign(load_pkey(ecdsa_private_key, true), all_messages, all_messages_index);
byte* cert_verify_signature = sign2(load_key(ecdsa_private_key, true), test, 0x20);
// byte* cert_verify_signature = sign(load_pkey(ecdsa_private_key, true), test, 0x20);
printf("\nCert signed: \n");
print_hex(cert_verify_signature, 0x48);
memcpy(tls_certificate + 0x09 + 0x109 + 0x04, cert_verify_signature, 0x48);
// printf("\nWhat signed: \n");
// print_hex(all_messages, all_messages_index);
// encrypted finished
byte handshake_messages[0x20]; int len3 = 0x20;
HUpdate(tls_hash_context2, tls_certificate + 0x09 + 0x109, 0x4c);
HASH_End(tls_hash_context2, handshake_messages, &len3, 0x20);
puts("hash of handshake messages");
print_hex(handshake_messages, 0x20); // ok
byte *finished_message = malloc(0x10);
finished_message[0] = 0x14;
finished_message[1] = finished_message[2] = 0x00;
finished_message[3] = 0x0c;
validity90_tls_prf(master_secret, 0x30, "client finished", handshake_messages, 0x20, 0x0c, finished_message + 0x04, NULL);
// copy handshake protocol
puts("client finished");
print_hex(finished_message, 0x10);
byte * final;
int final_size;
mac_then_encrypt(0x16, finished_message, 0x10, &final, &final_size);
memcpy(tls_certificate + 0x169, final, final_size);
puts("final");
print_hex(final, final_size);
qwrite(tls_certificate, sizeof(tls_certificate));
qread(buff, 1024 * 1024, &len);
}
void tls_write(byte * data, int data_len) {
byte *res;
int res_len;
mac_then_encrypt(0x17, data, data_len, &res, &res_len);
byte *wr = malloc(res_len + 5);
memcpy(wr + 5, res, res_len);
wr[0] = 0x17; wr[1] = wr[2] = 0x03; wr[3] = res_len >> 8; wr[4] = res_len & 0xFF;
qwrite(wr, res_len + 5);
free(res);
free(wr);
}
void tls_read(byte *output_buffer, int *output_len) {
byte *raw_buff = malloc(1024 * 1024);
int raw_buff_len;
qread(raw_buff, 1024 * 1024, &raw_buff_len);
int buff_len = raw_buff_len - 5;
byte *buff = raw_buff + 5;
EVP_CIPHER_CTX *context = EVP_CIPHER_CTX_new();
errb(EVP_DecryptInit(context, EVP_aes_256_cbc(), key_block + 0x60, buff));
EVP_CIPHER_CTX_set_padding(context, 0);
int res_len = buff_len - 0x10;
int tlen1 = 0, tlen2;
byte *res = malloc(res_len);
errb(EVP_DecryptUpdate(context, res, &tlen1, buff + 0x10, res_len));
errb(EVP_DecryptFinal(context, res + tlen1, &tlen2));
EVP_CIPHER_CTX_free(context);
*output_len = tlen1 + tlen2 - 0x20 - (res[res_len - 1] + 1);
memcpy(output_buffer, res, *output_len);
free(raw_buff);
}
int writeImage(char* filename, int width, int height, float *buffer) {
int code = 0;
FILE *fp = NULL;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
// Open file for writing (binary mode)
fp = fopen(filename, "wb");
if (fp == NULL) {
fprintf(stderr, "Could not open file %s for writing\n", filename);
code = 1;
goto finalise;
}
// Initialize write structure
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (png_ptr == NULL) {
fprintf(stderr, "Could not allocate write struct\n");
code = 1;
goto finalise;
}
// Initialize info structure
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL) {
fprintf(stderr, "Could not allocate info struct\n");
code = 1;
goto finalise;
}
// Setup Exception handling
if (setjmp(png_jmpbuf(png_ptr))) {
fprintf(stderr, "Error during png creation\n");
code = 1;
goto finalise;
}
png_init_io(png_ptr, fp);
// Write header (8 bit colour depth)
png_set_IHDR(png_ptr, info_ptr, width, height,
8, PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
png_write_info(png_ptr, info_ptr);
// Write image data
int x, y;
for (y=0 ; y<height ; y++) {
png_write_row(png_ptr, buffer + 36 * y);
}
// End write
png_write_end(png_ptr, NULL);
finalise:
if (fp != NULL) fclose(fp);
if (info_ptr != NULL) png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
if (png_ptr != NULL) png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
return code;
}
void fingerprint() {
byte data1[] = {
0x08, 0x5c, 0x20, 0x00, 0x80, 0x07, 0x00, 0x00, 0x00, 0x04
};
byte data2[] = {
0x07, 0x80, 0x20, 0x00, 0x80, 0x04
};
byte data345[] = {
0x75
};
byte data67[] = {
0x43, 0x02
};
byte data10[] = {
0x51, 0x00, 0x20, 0x00, 0x00 // read data - return buffer
};
byte data11[] = {
0x51, 0x00, 0x20, 0x00, 0x00
};
byte response[1024 * 1024];
int response_len = 0;
tls_write(led_green_on, sizeof(led_green_on));
tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);
tls_write(data1, sizeof(data1)); // not required
tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);
tls_write(data2, sizeof(data2)); // not required
tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);
for (int i =0; i < 3; i++ ){ // not required
tls_write(data345, sizeof(data345));
tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);
}
for (int i =0; i < 2; i++ ){ // not required
tls_write(data67, sizeof(data67));
tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);
}
/*tls_write(scan_matrix2, sizeof(scan_matrix2));
tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);*/
// Check DB
tls_write(scan_matrix1, sizeof(scan_matrix1));tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);
//tls_write(v97_scan_matrix2, sizeof(v97_scan_matrix2)); tls_read(response, &response_len);puts("READ:");print_hex(response, response_len);
byte interrupt[0x100]; int interrupt_len;
const byte waiting_finger[] = { 0x00, 0x00, 0x00, 0x00, 0x00 };
const byte finger_down[] = { 0x02, 0x00, 0x40, 0x10, 0x00 };
const byte finger_down2[] = { 0x02, 0x00, 0x40, 0x06, 0x06 };
const byte scanning_prints[] = { 0x03, 0x40, 0x01, 0x00, 0x00 };
const byte scan_completed[] = { 0x03, 0x41, 0x03, 0x00, 0x40 };
const byte desired_interrupt[] = { 0x03, 0x43, 0x04, 0x00, 0x41 };
const byte desired_interrupt_v97[] = { 0x03, 0x42, 0x04, 0x00, 0x40 };
const byte low_quality_scan_interrupt[] = { 0x03, 0x42, 0x04, 0x00, 0x40 };
const byte scan_failed_too_short_interrupt[] = { 0x03, 0x60, 0x07, 0x00, 0x40 };
const byte scan_failed_too_short2_interrupt[] = { 0x03, 0x61, 0x07, 0x00, 0x41 };
const byte scan_failed_too_fast_interrupt[] = { 0x03, 0x20, 0x07, 0x00, 0x00 };
puts("Awaiting fingerprint:");
while (true) {
int status = libusb_interrupt_transfer(dev, 0x83, interrupt, 0x100, &interrupt_len, 5 * 1000);
if (status == 0) {
puts("interrupt:");
print_hex(interrupt, interrupt_len);
fflush(stdout);
if (sizeof(waiting_finger) == interrupt_len &&
memcmp(waiting_finger, interrupt, interrupt_len) == 0) {
puts("Waiting for finger...");
}
if ((sizeof(finger_down) == interrupt_len &&
memcmp(finger_down, interrupt, interrupt_len) == 0) ||
(sizeof(finger_down2) == interrupt_len &&
memcmp(finger_down2, interrupt, interrupt_len) == 0)) {
puts("Finger is on the sensor...");
}
if (sizeof(scanning_prints) == interrupt_len &&
memcmp(scanning_prints, interrupt, interrupt_len) == 0) {
puts("Scan in progress...");
}
if (sizeof(scan_completed) == interrupt_len &&
memcmp(scan_completed, interrupt, interrupt_len) == 0) {
puts("Fingerprint scan completed...");
}
if (sizeof(scan_failed_too_short_interrupt) == interrupt_len &&
memcmp(scan_failed_too_short_interrupt, interrupt, interrupt_len) == 0) {
puts("Impossible to read fingerprint, keep it in the sensor");
return;
}
if (sizeof(scan_failed_too_short2_interrupt) == interrupt_len &&
memcmp(scan_failed_too_short2_interrupt, interrupt, interrupt_len) == 0) {
puts("Impossible to read fingerprint, keep it in the sensor (2)");
return;
}
if (sizeof(scan_failed_too_fast_interrupt) == interrupt_len &&
memcmp(scan_failed_too_fast_interrupt, interrupt, interrupt_len) == 0) {
puts("Impossible to read fingerprint, movement was too fast");
return;
}
if (sizeof(desired_interrupt) == interrupt_len &&
memcmp(desired_interrupt, interrupt, interrupt_len) == 0) {
puts("Scan succeeded!");
break;
}
if (sizeof(desired_interrupt_v97) == interrupt_len &&
memcmp(desired_interrupt_v97, interrupt, interrupt_len) == 0) {
puts("Scan succeeded! (v97)");
break;
}