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[makerom] Fix initial data generation.

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This commit is contained in:
jakcron
2022-04-17 10:00:43 +08:00
parent 059610f41e
commit 9581ea6db0
1 changed files with 89 additions and 28 deletions
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makerom/src/cardinfo.c
+87 -26
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@@ -1,4 +1,8 @@
#include "lib.h"
#include <mbedtls/ccm.h>
#include "aes_keygen.h"
#include "ncch_read.h"
#include "ncsd_build.h"
#include "cardinfo.h"
@@ -8,8 +12,7 @@ int SetWriteableAddress(cardinfo_hdr *hdr, cci_settings *set);
int SetCardInfoBitmask(cardinfo_hdr *hdr, cci_settings *set);
int SetCardInfoNotes(cardinfo_hdr *hdr, cci_settings *set);
void SetNcchHeader(cardinfo_hdr *hdr, cci_settings *set);
void SetCardSeedData(cardinfo_hdr *hdr, cci_settings *set);
void SetDevCardInfo(devcardinfo_hdr *hdr, cci_settings *set);
void SetCardSeedData(cardinfo_hdr *hdr, devcardinfo_hdr *devhdr, cci_settings *set);
int GenCardInfoHdr(cci_settings *set)
@@ -26,30 +29,20 @@ int GenCardInfoHdr(cci_settings *set)
if(SetCardInfoNotes(cihdr,set))
return GEN_HDR_FAIL;
SetNcchHeader(cihdr,set);
SetCardSeedData(cihdr,set);
if(dcihdr)
SetDevCardInfo(dcihdr,set);
SetCardSeedData(cihdr,dcihdr,set);
return 0;
}
void InitCardInfoHdr(cardinfo_hdr **cihdr, devcardinfo_hdr **dcihdr, cci_settings *set)
{
set->headers.cardinfohdr.size = sizeof(cardinfo_hdr);
if(set->options.useExternalSdkCardInfo)
set->headers.cardinfohdr.size += sizeof(devcardinfo_hdr);
set->headers.cardinfohdr.size = sizeof(cardinfo_hdr) + sizeof(devcardinfo_hdr);
set->headers.cardinfohdr.buffer = calloc(1,set->headers.cardinfohdr.size);
*cihdr = (cardinfo_hdr*)set->headers.cardinfohdr.buffer;
if(set->headers.cardinfohdr.size > sizeof(cardinfo_hdr))
*dcihdr = (devcardinfo_hdr*)(set->headers.cardinfohdr.buffer+sizeof(cardinfo_hdr));
else
*dcihdr = NULL;
//clrmem(set->headers.cardinfohdr.buffer, set->headers.cardinfohdr.size);
clrmem(set->headers.cardinfohdr.buffer, set->headers.cardinfohdr.size);
return;
}
@@ -128,12 +121,12 @@ int SetCardInfoBitmask(cardinfo_hdr *hdr, cci_settings *set)
char *str = set->rsf->CardInfo.CardType;
if(!str)
bitmask |= 0;
bitmask |= 0 << 5;
else{
if(strcasecmp(str,"s1") == 0)
bitmask |= 0;
bitmask |= 0 << 5;
else if(strcasecmp(str,"s2") == 0)
bitmask |= 0x20;
bitmask |= 1 << 5;
else {
fprintf(stderr,"[CCI ERROR] Invalid CardType: %s\n",str);
return INVALID_RSF_OPT;
@@ -143,7 +136,7 @@ int SetCardInfoBitmask(cardinfo_hdr *hdr, cci_settings *set)
str = set->rsf->CardInfo.CryptoType;
if(!str) {
if(set->options.useExternalSdkCardInfo)
bitmask |= (3*0x40);
bitmask |= (3 << 6);
else
bitmask |= 0;
}
@@ -153,9 +146,14 @@ int SetCardInfoBitmask(cardinfo_hdr *hdr, cci_settings *set)
fprintf(stderr,"[CCI ERROR] Invalid CryptoType: %s\n",str);
return INVALID_RSF_OPT;
}
if(val != 3)
fprintf(stderr,"[CCI WARNING] Card crypto type = '%d'\n",val);
bitmask |= val * 0x40;
if(val != 3 && set->keys->keyset == pki_DEVELOPMENT) {
fprintf(stderr,"[CCI WARNING] Card crypto type = '%d', this is not supported for development target.\n",val);
}
if(val == 3 && set->keys->keyset == pki_PRODUCTION) {
fprintf(stderr,"[CCI WARNING] Card crypto type = '%d', this is not supported for production target.\n",val);
}
bitmask |= val << 6;
}
u32_to_u8(hdr->cardInfoBitmask,bitmask,BE);
@@ -189,7 +187,7 @@ void SetNcchHeader(cardinfo_hdr *hdr, cci_settings *set)
return;
}
void SetCardSeedData(cardinfo_hdr *hdr, cci_settings *set)
void SetCardSeedData(cardinfo_hdr *hdr, devcardinfo_hdr *devhdr, cci_settings *set)
{
u8 *ncch;
ncch_hdr *ncchHdr;
@@ -197,19 +195,82 @@ void SetCardSeedData(cardinfo_hdr *hdr, cci_settings *set)
ncch = set->content.data + set->content.dOffset[0];
ncchHdr = (ncch_hdr*)ncch;
/*
if (set->options.useExternalSdkCardInfo) {
// initial data
clrmem(hdr->cardSeedKeyY, 0x10);
memcpy(hdr->cardSeedKeyY, ncchHdr->titleId, 8);
clrmem(hdr->encCardSeed, 0x10);
memcpy(hdr->cardSeedMac, stock_card_seed_mac, 0x10);
clrmem(hdr->cardSeedNonce, 0xC);
// dev card info
memcpy(devhdr->titleKey, stock_title_key, 0x10);
return;
}
else {
*/
// select title_key
u8 title_key[0x10] = {0};
if (set->options.useExternalSdkCardInfo)
{
memcpy(title_key, stock_title_key, 0x10);
}
else
{
rndset(title_key, 0x10);
}
// generate initial data
{
// set the keyY
clrmem(hdr->cardSeedKeyY, 0x10);
memcpy(hdr->cardSeedKeyY, ncchHdr->titleId, 8);
rndset(hdr->encCardSeed, 0x10);
rndset(hdr->cardSeedMac, 0x10);
// use crypto type to determine initial data key
uint32_t crypto_type = (u8_to_u32(hdr->cardInfoBitmask, BE) >> 6) & 3;
u8 initial_data_key[0x10] = {0};
if (crypto_type == 3)
{
clrmem(initial_data_key, 0x10);
}
else
{
ctr_aes_keygen(set->keys->aes.initialDataKeyX, hdr->cardSeedKeyY, initial_data_key);
}
// determine nonce
if (set->options.useExternalSdkCardInfo)
{
clrmem(hdr->cardSeedNonce, 0xC);
}
else
{
rndset(hdr->cardSeedNonce, 0xC);
}
// encrypt title key (& generate MAC)
mbedtls_ccm_context ccm_ctx;
mbedtls_ccm_init(&ccm_ctx);
mbedtls_ccm_setkey(&ccm_ctx, MBEDTLS_CIPHER_ID_AES, initial_data_key, 128);
int ccm_ret = mbedtls_ccm_encrypt_and_tag(&ccm_ctx, sizeof(title_key), hdr->cardSeedNonce, sizeof(hdr->cardSeedNonce), NULL, 0, title_key, hdr->encCardSeed, hdr->cardSeedMac, sizeof(hdr->cardSeedMac));
if (ccm_ret != 0)
{
printf("[CARDINFO WARNING] Failed to encrypt initial data (mbedtls error: -0x%04X)\n", -ccm_ret);
}
mbedtls_ccm_free(&ccm_ctx);
}
// generate dev card info header
{
memcpy(devhdr->titleKey, title_key, 0x10);
}
return;
}