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Example SMC implementation (load_aes_key)

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This commit is contained in:
Michael Scire
2018-02-17 16:34:31 -08:00
parent 49e1e6f41e
commit 5c24f58402
3 changed files with 98 additions and 3 deletions
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31
exosphere/smc_user.c Normal file
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#include <stdint.h>
#include "utils.h"
#include "smc_api.h"
#include "smc_user.h"
#include "se.h"
uint32_t user_load_aes_key(smc_args_t *args) {
unsigned char sealed_kek[0x10];
unsigned char wrapped_key[0x10];
uint64_t *p_sealed_kek = (uint64_t *)(&sealed_kek[0]);
uint64_t *p_wrapped_key = (uint64_t *)(&wrapped_key[0]);
uint32_t keyslot = (uint32_t)args->X[1];
if (keyslot > 3) {
return 2;
}
/* Copy keydata */
p_sealed_kek[0] = args->X[2];
p_sealed_kek[1] = args->X[3];
p_wrapped_key[0] = args->X[4];
p_wrapped_key[1] = args->X[5];
/* TODO: Unseal the kek. */
set_aes_keyslot(9, sealed_kek, 0x10);
/* Unwrap the key. */
decrypt_data_into_keyslot(keyslot, 9, wrapped_key, 0x10);
return 0;
}