mirrors/Atmosphere
1
0
Fork 0
mirror of https://github.com/Atmosphere-NX/Atmosphere.git synced 2025-06-04 08:29:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

smcDecryptRsaPrivateKey

Browse source
This commit is contained in:
Michael Scire 2018-02-20 12:56:41 -08:00
parent 81b874cc14
commit 3d80b4edbc
4 changed files with 58 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

52
exosphere/smc_user.c
View file

@ -296,6 +296,58 @@ uint32_t user_compute_cmac(smc_args_t *args) {
return 0;
}
uint32_t user_decrypt_rsa_private_key(smc_args_t *args) {
uint64_t sealed_kek[2];
uint64_t wrapped_key[2];
int is_personalized;
uint8_t user_data[0x400];
void *user_address;
size_t size;
upage_ref_t page_ref;
/* Copy keydata */
sealed_kek[0] = args->X[1];
sealed_kek[1] = args->X[2];
if (args->X[3] > 1) {
return 2;
}
is_personalized = (int)args->X[3];
user_address = (void *)args->X[4];
size = = (size_t)args->X[5];
wrapped_key[0] = args->X[6];
wrapped_key[1] = args->X[7];
if (size > 0x240) {
return 2;
}
if (is_personalized && size < 0x31) {
return 2;
}
if (!is_personalized && (size < 0x11 /* || GET_BOOTROM_PATCH_VERSION >= 0x7F */)) {
return 2;
}
if (upage_init(&page_ref, user_address) == 0 || user_copy_to_secure(&page_ref, user_data, user_address, size) == 0) {
return 2;
}
size_t out_size;
if ((out_size = gcm_decrypt_key(user_data, size, user_data, size, sealed_kek, 0x10, wrapped_key, 0x10, CRYPTOUSECASE_RSAPRIVATE, is_personalized)) == 0) {
return 2;
}
if (secure_copy_to_user(&page_ref, user_address, user_data, size) == 0) {
return 2;
}
args->X[1] = out_size;
return 0;
}
uint32_t user_rsa_oaep(smc_args_t *args) {
uint8_t modulus[0x100];
uint8_t input[0x100];