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main.c
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main.c
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/*
Warning: extremly ugly code
*/
#include <stdio.h>
#include <stdbool.h>
#include <libusb.h>
#include <stdlib.h>
#include <string.h>
#include <nss.h>
#include <nss/keyhi.h>
#include <nss/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"
#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))
static libusb_device_handle * dev;
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];
byte* TLS_PRF2(byte * secret, int secret_len, char * str, byte * seed40, int seed40_len, int required_len);
byte gLabel[13];
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);
}
void 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);*/
}
}
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];
bool check_pad_b(byte *data, int len) {
byte pad_size = data[len - 1];
for(int i = 0; i < pad_size; i++) {
if (data[len - 1 - i] != pad_size) {
return false;
}
}
return true;
}
void check_pad(byte *data, int len) {
if (!check_pad_b(data, len)) {
puts("PAD FAILED");
exit(-1);
}
}
void reverse_mem(byte * data, int size) {
byte tmp;
for (int i = 0; i < size / 2; i++) {
tmp = data[i];
data[i] = data[size - 1 - i];
data[size - 1 - i] = tmp;
}
}
void make_aes_master(byte * seed, int seed_len) {
puts("prf seed");
print_hex(seed, seed_len);
byte *aes_master = TLS_PRF2(pre_key, 0x20, "GWK", seed, seed_len, 0x20);
memcpy(masterkey_aes, aes_master, 0x20);
free(aes_master);
puts("AES master:");
print_hex(masterkey_aes, 0x20);
}
bool handle_ecdsa(byte *enc_data, int res_len) {
EVP_CIPHER_CTX *context = EVP_CIPHER_CTX_new();
errb(EVP_DecryptInit(context, EVP_aes_256_cbc(), masterkey_aes, enc_data));
EVP_CIPHER_CTX_set_padding(context, 0);
int tlen1 = 0, tlen2;
byte *res = malloc(res_len);
errb(EVP_DecryptUpdate(context, res, &tlen1, enc_data + 0x10, res_len));
errb(EVP_DecryptFinal(context, res + tlen1, &tlen2));
EVP_CIPHER_CTX_free(context);
reverse_mem(res, 0x20);
reverse_mem(res + 0x20, 0x20);
reverse_mem(res + 0x40, 0x20);
puts("Decoded:");
print_hex(res, res_len);
memcpy(ecdsa_private_key, res, 0x60);
bool resb;
resb = check_pad_b(res, res_len);
free(res);
return resb;
}
byte mainSeed[1024];
int mainSeedLength;
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(mainSeed, name, len1 + 1);
memcpy(mainSeed + len1 + 1, serial, len2 + 1);
mainSeedLength = len1 + len2 + 2;
fclose(nameFile);
fclose(serialFile);
}
void init() {
int len;
byte buff[1024 * 1024];
#define STEP(a,b) { \
qwrite(a, sizeof(a) / sizeof(byte)); \
qread(buff, 1024 * 1024, &len); \
compare(buff, len, b, sizeof(b) / sizeof(dword)); \
}
STEP(init_sequence_msg1, init_sequence_rsp1);
STEP(init_sequence_msg2, init_sequence_rsp2);
STEP(init_sequence_msg3, init_sequence_rsp3);
STEP(init_sequence_msg4, init_sequence_rsp4);
STEP(init_sequence_msg5, init_sequence_rsp5);
STEP(init_sequence_msg6, init_sequence_rsp6);
#undef STEP
byte test_data[] = "VirtualBox\0" "0";
// byte test_data[] = "5Test5\0DmiSystemSerial";
if (len > 0x660 + 0x20) {
make_aes_master(mainSeed, mainSeedLength);
if (!handle_ecdsa(buff + 0x52, 0x70)) {
make_aes_master(test_data, sizeof(test_data));
if (!handle_ecdsa(buff + 0x52, 0x70)) {
puts("PAD FAILED");
exit(EXIT_FAILURE);
}
}
memset(ecdsa_private_key, 0, 0x40);
// 97 doesn't have XY in private key
memcpy(ecdsa_private_key, buff + 0x11e, 0x20);
reverse_mem(ecdsa_private_key, 0x20);
memcpy(ecdsa_private_key + 0x20, buff + 0x162, 0x20);
reverse_mem(ecdsa_private_key + 0x20, 0x20);
// ECDSA key
puts("ECDSA key:");
print_hex(ecdsa_private_key, 0x60);
// Cert
memcpy(tls_certificate + 21, buff + 0x116, 0xb8);
// Pubkey
memcpy(pubkey1, buff + 0x600 + 10, 0x20);
memcpy(pubkey1 + 0x20, buff + 0x640 + 0xe, 0x20);
reverse_mem(pubkey1, 0x20);
reverse_mem(pubkey1 + 0x20, 0x20);
puts("pub key:");
print_hex(pubkey1, 0x40);
} else {
puts("Invalid rsp6, can't get public key");
exit(-1);
}
fflush(stdout);
}
void test_crypto1() {
// Gen EC p256 keypair
SECKEYPublicKey* pub_key = NULL;
SECKEYPrivateKey* priv_key = NULL;
// SECItem ec_der_params;
// memset(&ec_der_params, 0, sizeof(ec_der_params));
// ec_der_params.data = kANSIX962CurveParams;
// ec_der_params.len = sizeof(kANSIX962CurveParams);
// priv_key = SECKEY_CreateECPrivateKey(&ec_der_params, &pub_key, NULL);
// PK11_ImportPublicKey()
// PK11_ImportPrivateKeyInfoAndReturnKey();
// PK11_ExportDERPrivateKeyInfo();
// PK11_ExportPrivKeyInfo()
SECOidData* oid_data = SECOID_FindOIDByTag(SEC_OID_SECG_EC_SECP256R1);
byte * buff = malloc(oid_data->oid.len + 2);
SECKEYECParams ec_parameters = {
siDEROID, buff,
oid_data->oid.len + 2
};
ec_parameters.data[0] = SEC_ASN1_OBJECT_ID;
ec_parameters.data[1] = oid_data->oid.len;
memcpy(ec_parameters.data + 2, oid_data->oid.data, oid_data->oid.len);
PK11SlotInfo *slot
= PK11_GetInternalKeySlot();
priv_key = PK11_GenerateKeyPair(slot, CKM_EC_KEY_PAIR_GEN,
& ec_parameters, &pub_key,
PR_FALSE, PR_FALSE, NULL);
// SECKEYPrivateKeyInfo *derPriv = PK11_ExportEncryptedPrivKeyInfo(priv_key, NULL);
// SECKEYPrivateKeyInfo *info = PK11_ExportPrivKeyInfo(priv_key, NULL);
// ssl3_
// PK11_ExportEncryptedPrivKeyInfo(slot, )
// print_hex(derPriv->data, derPriv->len);
puts("done");
}
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);
return res;
}
void test_crypto_hash() {
byte p[] = {
0x71, 0x7c, 0xd7, 0x2d, 0x09, 0x62, 0xbc, 0x4a, 0x28, 0x46, 0x13, 0x8d, 0xbb, 0x2c, 0x24, 0x19,
0x25, 0x12, 0xa7, 0x64, 0x07, 0x06, 0x5f, 0x38, 0x38, 0x46, 0x13, 0x9d, 0x4b, 0xec, 0x20, 0x33
};
byte data[] = {
0xbc, 0x41, 0x9d, 0xfc, 0x39, 0xc9, 0xba, 0x69, 0xa7, 0x4d, 0x5d, 0x60, 0x0a, 0xc3, 0x5b, 0x7b,
0x1a, 0xfb, 0x2b, 0x52, 0xe5, 0xd2, 0x4a, 0x23, 0x04, 0x58, 0x67, 0xc8, 0x3a, 0x98, 0xaa, 0x9a,
0x47, 0x57, 0x4b, 0x56, 0x69, 0x72, 0x74, 0x75, 0x61, 0x6c, 0x42, 0x6f, 0x78, 0x00, 0x30, 0x00
};
PK11Context* context = hmac_make_context(p, 0x20);
PK11_DigestOp(context, data, 0x30);
byte res[0x20];
int len = 0x20;
PK11_DigestFinal(context, res, &len, 0x20);
print_hex(res, 0x20);
/*
* 0000 48 78 02 70 5e 5a c4 a9 93 1c 44 aa 4d 32 25 22
* 0010 39 e0 bf 8f 0c 85 4d de 49 0c cc f6 87 ef ad 9c
*/
}
void test_crypto_hash_hmac() {
HASHContext *context = HASH_Create(HASH_AlgSHA256);
HASH_Begin(context);
int hashLen = HASH_ResultLen(HASH_AlgSHA256);
byte data[] = {0x00};
byte result[hashLen];
HASH_Update(context, data, 1);
int res_len = 0;
HASH_End(context, result, &res_len, hashLen);
print_hex(result, hashLen);
}
//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;
}
byte* TLS_PRF2(byte * secret, int secret_len, char * str, byte * seed40, int seed40_len, int required_len) {
int total_len = 0;
int str_len = strlen(str);
byte seed[str_len + seed40_len];
memcpy(seed, str, str_len);
memcpy(seed + str_len, seed40, seed40_len);
int seed_len = str_len + seed40_len;
byte* res = malloc(required_len);
byte *a = hmac_compute(secret, secret_len, seed, seed_len);
while (total_len < required_len) {
byte buff[0x20 + seed_len];
memcpy(buff, a, 0x20);
memcpy(buff + 0x20, seed, seed_len);
byte * p = hmac_compute(secret, secret_len, buff, 0x20 + seed_len);
memcpy(res + total_len, p, min(0x20, required_len - total_len));
free(p);
total_len += 0x20;
byte *t = hmac_compute(secret, secret_len, a, 0x20);
free(a);
a = t;
}
free(a);
return res;
}
void openssl() {
EC_KEY *priv_key = load_key(privkey1, true);
EC_KEY *pub_key = load_key(pubkey1, false);
if (!priv_key || !pub_key) {
puts("failed to load");
return;
}
int status;
EC_KEY_print_fp(stdout, priv_key, 0);
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 len = 0;
status = EVP_PKEY_derive(ctx, NULL, &len);
byte pre_master_secret[len];
// status = EVP_PKEY_derive(ctx, pre_master_secret, &len);
ECDH_compute_key(pre_master_secret, 0x20, EC_KEY_get0_public_key(pub_key), priv_key, NULL);
print_hex(pre_master_secret, len);
puts("\n");
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);
puts("master secret");
byte * master_secret = TLS_PRF2(pre_master_secret, 0x20, "master secret", seed, 0x40, 0x30);
print_hex(master_secret, 0x30);
puts("keyblock");
byte * key_block = TLS_PRF2(master_secret, 0x30, "key expansion", seed, 0x40, 0x120);
print_hex(key_block, 0x120);
// EVP_PKEY_CTX_set_ecdh_kdf_md()
// EVP_PKEY_derive()
puts("ok");
return;////////////////////////////////////////////////////////////////////////////
//CKM_TLS_MASTER_KEY_DERIVE_DH
CK_MECHANISM_TYPE derive_mech = CKM_NSS_TLS_MASTER_KEY_DERIVE_SHA256;
CK_MECHANISM_TYPE hash_mech = CKM_SHA256;
CK_MECHANISM_TYPE key_mech = CKM_NSS_TLS_MASTER_KEY_DERIVE_SHA256;
CK_VERSION pms_version;
PK11SlotInfo *slot = PK11_GetInternalSlot();
//CK_SSL3_MASTER_KEY_DERIVE_PARAMS
CK_TLS12_MASTER_KEY_DERIVE_PARAMS key_derive_params;
key_derive_params.RandomInfo.pClientRandom = client_random;
key_derive_params.RandomInfo.ulClientRandomLen = 0x20;
key_derive_params.RandomInfo.pServerRandom = server_random;
key_derive_params.RandomInfo.ulServerRandomLen = 0x20;
key_derive_params.pVersion = &pms_version;
key_derive_params.prfHashMechanism = CKM_SHA256;
SECItem key = { .type = siBuffer, .data = pre_master_secret, .len = 0x20 };
SECItem params_ = {.data = &key_derive_params, .len = sizeof(key_derive_params) };
PK11SymKey * pms_ = PK11_ImportSymKey(slot, derive_mech, PK11_OriginUnwrap, CKA_DERIVE, &key, NULL);
PK11SymKey *master_nss = PK11_DeriveWithFlags(pms_, derive_mech, ¶ms_, key_mech, CKA_DERIVE, 0, CKF_SIGN | CKF_VERIFY);
/*
* PK11SymKey *PK11_DeriveWithFlags(PK11SymKey *baseKey,
CK_MECHANISM_TYPE derive, SECItem *param, CK_MECHANISM_TYPE target,
CK_ATTRIBUTE_TYPE operation, int keySize, CK_FLAGS flags);
*
*/
puts("NSS");
SECItem *master_nss_data = PK11_GetKeyData(master_nss);
print_hex(master_nss_data->data, master_nss_data->len);
}
void export_import_keys() {
EC_KEY *priv_key = load_key(privkey1, true);
EC_KEY *pub_key = load_key(pubkey1, false);
// EC_KEY_set_enc_flags(priv_key, );
int len = i2d_ECPrivateKey(priv_key, NULL);
byte out[len];
unsigned char * derkeyPtr = out;
i2d_ECPrivateKey(priv_key, &derkeyPtr);
print_hex(out, len);
// PEM_write_bio_ECPrivateKey(
// PEM_ASN1_write()
}
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<<");
}
byte * key_block;
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);
byte * master_secret = TLS_PRF2(pre_master_secret, 0x20, "master secret", seed, 0x40, 0x30);
puts("master secret");
print_hex(master_secret, 0x30);
key_block = TLS_PRF2(master_secret, 0x30, "key expansion", seed, 0x40, 0x120);
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;
memcpy(finished_message + 0x04, TLS_PRF2(master_secret, 0x30, "client finished", handshake_messages, 0x20, 0x0c), 0x0c);
// 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);