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Implement smcRsaOaep

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This commit is contained in:
Michael Scire 2018-02-19 21:09:53 -08:00
parent f1c521a5d6
commit 59281c5a97
2 changed files with 37 additions and 0 deletions
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4
exosphere/smc_api.c
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@ -301,6 +301,10 @@ uint32_t smc_compute_cmac(smc_args_t *args) {
return smc_wrapper_sync(args, user_compute_cmac);
}
uint32_t smc_rsa_oaep(smc_args_t *args) {
return smc_wrapper_async(args, user_rsa_oaep, smc_exp_mod_get_result);
}
uint32_t smc_cpu_on(smc_args_t *args) {

33
exosphere/smc_user.c
View file

@ -11,6 +11,9 @@
int g_crypt_aes_done = 0;
int g_exp_mod_done = 0;
uint8_t g_rsa_oaep_exponent[0x100];
uint8_t g_rsa_private_exponent[0x100];
void set_exp_mod_done(int done) {
g_exp_mod_done = done & 1;
@ -178,3 +181,33 @@ uint32_t user_compute_cmac(smc_args_t *args) {
return 0;
}
uint32_t user_rsa_oaep(smc_args_t *args) {
uint8_t modulus[0x100];
uint8_t input[0x100];
upage_ref_t page_ref;
size_t exponent_size = (size_t)args->X[4];
void *user_input = (void *)args->X[1];
void *user_modulus = (void *)args->X[2];
/* Copy user data into secure memory. */
if (upage_init(&page_ref, user_input) == 0) {
return 2;
}
if (user_copy_to_secure(&page_ref, input, user_input, 0x100) == 0) {
return 2;
}
if (user_copy_to_secure(&page_ref, modulus, user_modulus, 0x100) == 0) {
return 2;
}
set_exp_mod_done(0);
/* Hardcode RSA keyslot 0. */
set_rsa_keyslot(0, modulus, 0x100, g_rsa_oaep_exponent, 0x100);
se_exp_mod(0, input, 0x100, exp_mod_done_handler);
return 0;
}