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Implement titlekey SMCs (with skeleton tkey API)

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This commit is contained in:
Michael Scire 2018-02-19 21:47:11 -08:00
parent 59281c5a97
commit 61f8886879
4 changed files with 141 additions and 6 deletions
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43
exosphere/smc_api.c
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@ -7,6 +7,7 @@
#include "smc_user.h"
#include "se.h"
#include "userpage.h"
#include "titlekey.h"
#define SMC_USER_HANDLERS 0x13
#define SMC_PRIV_HANDLERS 0x9
@ -305,7 +306,49 @@ 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_unwrap_rsa_wrapped_titlekey_get_result(void *buf, uint64_t size) {
uint64_t *p_sealed_key = (uint64_t *)buf;
uint8_t rsa_wrapped_titlekey[0x100];
uint8_t aes_wrapped_titlekey[0x10];
uint8_t titlekey[0x10];
uint64_t sealed_titlekey[2];
if (get_exp_mod_done() != 1) {
return 3;
}
if (size != 0x10) {
return 2;
}
se_get_exp_mod_output(wrapped_titlekey, 0x100);
if (tkey_rsa_unwrap(aes_wrapped_titlekey, 0x10, rsa_wrapped_titlekey, 0x100) != 0x10) {
/* Failed to extract RSA wrapped key. */
g_is_smc_in_progress = 0;
return 2;
}
tkey_aes_unwrap(titlekey, 0x10, aes_wrapped_titlekey, 0x10);
tkey_seal(sealed_titlekey, 0x10, titlekey, 0x10);
p_sealed_key[0] = sealed_titlekey[0];
p_sealed_key[1] = sealed_titlekey[1];
/* smc_unwrap_aes_wrapped_titlekey is done now. */
g_is_smc_in_progress = 0;
return 0;
}
uint32_t smc_unwrap_rsa_wrapped_titlekey(smc_args_t *args) {
return smc_wrapper_async(args, user_unwrap_rsa_wrapped_titlekey, smc_unwrap_rsa_wrapped_titlekey_get_result);
}
uint32_t smc_load_titlekey(smc_args_t *args) {
return smc_wrapper_sync(args, user_load_titlekey);
}
uint32_t smc_unwrap_aes_wrapped_titlekey(smc_args_t *args) {
return smc_wrapper_sync(args, user_unwrap_aes_wrapped_titlekey);
}
uint32_t smc_cpu_on(smc_args_t *args) {
return cpu_on((uint32_t)args->X[1], args->X[2], args->X[3]);