static void import_dkek_share(sc_card_t *card, const char *inf, int iter, char *password, int num_of_password_shares)
{
sc_cardctl_sc_hsm_dkek_t dkekinfo;
EVP_CIPHER_CTX ctx;
FILE *in = NULL;
u8 filebuff[64],key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH],outbuff[64];
char *pwd = NULL;
int r, outlen, pwdlen;
in = fopen(inf, "rb");
if (in == NULL) {
perror(inf);
return;
}
if (fread(filebuff, 1, sizeof(filebuff), in) != sizeof(filebuff)) {
perror(inf);
return;
}
fclose(in);
if (memcmp(filebuff, magic, sizeof(magic) - 1)) {
printf("File %s is not a DKEK share\n", inf);
return;
}
if (password == NULL) {
if (num_of_password_shares == -1) {
printf("Enter password to decrypt DKEK share : ");
util_getpass(&pwd, NULL, stdin);
pwdlen = strlen(pwd);
printf("\n");
} else {
r = recreate_password_from_shares(&pwd, &pwdlen, num_of_password_shares);
if (r < 0) {
return;
}
}
} else {
pwd = password;
pwdlen = strlen(password);
}
printf("Deciphering DKEK share, please wait...\n");
EVP_BytesToKey(EVP_aes_256_cbc(), EVP_md5(), filebuff + 8, (u8 *)pwd, pwdlen, iter, key, iv);
OPENSSL_cleanse(pwd, strlen(pwd));
if (password == NULL) {
free(pwd);
}
EVP_CIPHER_CTX_init(&ctx);
EVP_DecryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, key, iv);
if (!EVP_DecryptUpdate(&ctx, outbuff, &outlen, filebuff + 16, sizeof(filebuff) - 16)) {
printf("Error decrypting DKEK share. Password correct ?\n");
return;
}
if (!EVP_DecryptFinal_ex(&ctx, outbuff + outlen, &r)) {
printf("Error decrypting DKEK share. Password correct ?\n");
return;
}
memset(&dkekinfo, 0, sizeof(dkekinfo));
memcpy(dkekinfo.dkek_share, outbuff, sizeof(dkekinfo.dkek_share));
dkekinfo.importShare = 1;
OPENSSL_cleanse(outbuff, sizeof(outbuff));
r = sc_card_ctl(card, SC_CARDCTL_SC_HSM_IMPORT_DKEK_SHARE, (void *)&dkekinfo);
OPENSSL_cleanse(&dkekinfo.dkek_share, sizeof(dkekinfo.dkek_share));
EVP_CIPHER_CTX_cleanup(&ctx);
if (r == SC_ERROR_INS_NOT_SUPPORTED) { // Not supported or not initialized for key shares
printf("Not supported by card or card not initialized for key share usage\n");
return;
}
if (r < 0) {
fprintf(stderr, "sc_card_ctl(*, SC_CARDCTL_SC_HSM_IMPORT_DKEK_SHARE, *) failed with %s\n", sc_strerror(r));
return;
}
printf("DKEK share imported\n");
print_dkek_info(&dkekinfo);
}
static int print_dkek_share(sc_card_t *card, const char *inf, int iter, const char *password, int num_of_password_shares)
{
// hex output can be used in the SCSH shell with the
// decrypt_keyblob.js file
sc_cardctl_sc_hsm_dkek_t dkekinfo;
EVP_CIPHER_CTX *ctx = NULL;
FILE *in = NULL;
u8 filebuff[64],key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH],outbuff[64];
char *pwd = NULL;
int r, outlen, pwdlen;
u8 i;
if (inf == NULL) {
fprintf(stderr, "No file name specified for DKEK share\n");
return -1;
}
in = fopen(inf, "rb");
if (in == NULL) {
perror(inf);
return -1;
}
if (fread(filebuff, 1, sizeof(filebuff), in) != sizeof(filebuff)) {
perror(inf);
fclose(in);
return -1;
}
fclose(in);
if (memcmp(filebuff, magic, sizeof(magic) - 1)) {
fprintf(stderr, "File %s is not a DKEK share\n", inf);
return -1;
}
if (password == NULL) {
if (num_of_password_shares == -1) {
printf("Enter password to decrypt DKEK share : ");
util_getpass(&pwd, NULL, stdin);
pwdlen = strlen(pwd);
printf("\n");
} else {
r = recreate_password_from_shares(&pwd, &pwdlen, num_of_password_shares);
if (r < 0) {
return -1;
}
}
} else {
pwd = (char *) password;
pwdlen = strlen(password);
}
printf("Deciphering DKEK share, please wait...\n");
EVP_BytesToKey(EVP_aes_256_cbc(), EVP_md5(), filebuff + 8, (u8 *)pwd, pwdlen, iter, key, iv);
OPENSSL_cleanse(pwd, strlen(pwd));
if (password == NULL) {
free(pwd);
}
ctx = EVP_CIPHER_CTX_new();
EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, key, iv);
if (!EVP_DecryptUpdate(ctx, outbuff, &outlen, filebuff + 16, sizeof(filebuff) - 16)) {
fprintf(stderr, "Error decrypting DKEK share. Password correct ?\n");
return -1;
}
if (!EVP_DecryptFinal_ex(ctx, outbuff + outlen, &r)) {
fprintf(stderr, "Error decrypting DKEK share. Password correct ?\n");
return -1;
}
memset(&dkekinfo, 0, sizeof(dkekinfo));
memcpy(dkekinfo.dkek_share, outbuff, sizeof(dkekinfo.dkek_share));
dkekinfo.importShare = 1;
OPENSSL_cleanse(outbuff, sizeof(outbuff));
printf("DKEK Share HEX: \n\n");
for (i = 0; i < sizeof(dkekinfo.dkek_share); i++)
{
printf("%02X", dkekinfo.dkek_share[i]);
}
printf("\n\n");
OPENSSL_cleanse(&dkekinfo.dkek_share, sizeof(dkekinfo.dkek_share));
EVP_CIPHER_CTX_free(ctx);
if (r == SC_ERROR_INS_NOT_SUPPORTED) { // Not supported or not initialized for key shares
fprintf(stderr, "Not supported by card or card not initialized for key share usage\n");
return -1;
}
if (r < 0) {
fprintf(stderr, "sc_card_ctl(*, SC_CARDCTL_SC_HSM_IMPORT_DKEK_SHARE, *) failed with %s\n", sc_strerror(r));
return -1;
}
//printf("DKEK share imported\n");
//print_dkek_info(&dkekinfo);
return 0;
}