mirror of
https://github.com/DarkMatterCore/nxdumptool.git
synced 2024-11-09 20:21:45 +00:00
413 lines
12 KiB
C
413 lines
12 KiB
C
/*
|
|
* Copyright (c) 2020 DarkMatterCore
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "cert.h"
|
|
#include "save.h"
|
|
#include "utils.h"
|
|
|
|
#define CERT_SAVEFILE_PATH BIS_SYSTEM_PARTITION_MOUNT_NAME "/save/80000000000000e0"
|
|
#define CERT_SAVEFILE_STORAGE_BASE_PATH "/certificate/"
|
|
|
|
#define CERT_TYPE(sig) (pub_key_type == CertPubKeyType_Rsa4096 ? CertType_Sig##sig##_PubKeyRsa4096 : \
|
|
(pub_key_type == CertPubKeyType_Rsa2048 ? CertType_Sig##sig##_PubKeyRsa2048 : CertType_Sig##sig##_PubKeyEcsda240))
|
|
|
|
/* Global variables. */
|
|
|
|
static save_ctx_t *g_esCertSaveCtx = NULL;
|
|
|
|
/* Function prototypes. */
|
|
|
|
static bool certOpenEsCertSaveFile(void);
|
|
static void certCloseEsCertSaveFile(void);
|
|
|
|
static bool _certRetrieveCertificateByName(Certificate *dst, const char *name);
|
|
static u8 certGetCertificateType(const void *data, u64 data_size);
|
|
|
|
static bool _certRetrieveCertificateChainBySignatureIssuer(CertificateChain *dst, const char *issuer);
|
|
static u32 certGetCertificateCountInSignatureIssuer(const char *issuer);
|
|
|
|
static u64 certCalculateRawCertificateChainSize(const CertificateChain *chain);
|
|
static void certCopyCertificateChainDataToMemoryBuffer(void *dst, const CertificateChain *chain);
|
|
|
|
bool certRetrieveCertificateByName(Certificate *dst, const char *name)
|
|
{
|
|
if (!dst || !name || !strlen(name))
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
if (!certOpenEsCertSaveFile()) return false;
|
|
|
|
bool ret = _certRetrieveCertificateByName(dst, name);
|
|
|
|
certCloseEsCertSaveFile();
|
|
|
|
return ret;
|
|
}
|
|
|
|
bool certRetrieveCertificateChainBySignatureIssuer(CertificateChain *dst, const char *issuer)
|
|
{
|
|
if (!dst || !issuer || !strlen(issuer) || strncmp(issuer, "Root-", 5) != 0)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
if (!certOpenEsCertSaveFile()) return false;
|
|
|
|
bool ret = _certRetrieveCertificateChainBySignatureIssuer(dst, issuer);
|
|
|
|
certCloseEsCertSaveFile();
|
|
|
|
return ret;
|
|
}
|
|
|
|
void certFreeCertificateChain(CertificateChain *chain)
|
|
{
|
|
if (!chain || !chain->certs) return;
|
|
|
|
chain->count = 0;
|
|
free(chain->certs);
|
|
chain->certs = NULL;
|
|
}
|
|
|
|
CertCommonBlock *certGetCommonBlockFromCertificate(Certificate *cert)
|
|
{
|
|
if (!cert || cert->type == CertType_None || cert->type > CertType_SigEcsda240_PubKeyEcsda240 || cert->size < CERT_MIN_SIZE || cert->size > CERT_MAX_SIZE)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return NULL;
|
|
}
|
|
|
|
CertCommonBlock *cert_common_blk = NULL;
|
|
|
|
switch(cert->type)
|
|
{
|
|
case CertType_SigRsa4096_PubKeyRsa4096:
|
|
cert_common_blk = &(((CertSigRsa4096PubKeyRsa4096*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigRsa4096_PubKeyRsa2048:
|
|
cert_common_blk = &(((CertSigRsa4096PubKeyRsa2048*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigRsa4096_PubKeyEcsda240:
|
|
cert_common_blk = &(((CertSigRsa4096PubKeyEcsda240*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigRsa2048_PubKeyRsa4096:
|
|
cert_common_blk = &(((CertSigRsa2048PubKeyRsa4096*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigRsa2048_PubKeyRsa2048:
|
|
cert_common_blk = &(((CertSigRsa2048PubKeyRsa2048*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigRsa2048_PubKeyEcsda240:
|
|
cert_common_blk = &(((CertSigRsa2048PubKeyEcsda240*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigEcsda240_PubKeyRsa4096:
|
|
cert_common_blk = &(((CertSigEcsda240PubKeyRsa4096*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigEcsda240_PubKeyRsa2048:
|
|
cert_common_blk = &(((CertSigEcsda240PubKeyRsa2048*)cert->data)->cert_common_blk);
|
|
break;
|
|
case CertType_SigEcsda240_PubKeyEcsda240:
|
|
cert_common_blk = &(((CertSigEcsda240PubKeyEcsda240*)cert->data)->cert_common_blk);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return cert_common_blk;
|
|
}
|
|
|
|
u8 *certGenerateRawCertificateChainBySignatureIssuer(const char *issuer, u64 *out_size)
|
|
{
|
|
if (!issuer || !strlen(issuer) || !out_size)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return NULL;
|
|
}
|
|
|
|
CertificateChain chain = {0};
|
|
u8 *raw_chain = NULL;
|
|
u64 raw_chain_size = 0;
|
|
|
|
if (!certRetrieveCertificateChainBySignatureIssuer(&chain, issuer))
|
|
{
|
|
LOGFILE("Error retrieving certificate chain for \"%s\"!", issuer);
|
|
return NULL;
|
|
}
|
|
|
|
raw_chain_size = certCalculateRawCertificateChainSize(&chain);
|
|
|
|
raw_chain = malloc(raw_chain_size);
|
|
if (!raw_chain)
|
|
{
|
|
LOGFILE("Unable to allocate memory for raw \"%s\" certificate chain! (0x%lX)", issuer, raw_chain_size);
|
|
goto out;
|
|
}
|
|
|
|
certCopyCertificateChainDataToMemoryBuffer(raw_chain, &chain);
|
|
*out_size = raw_chain_size;
|
|
|
|
out:
|
|
certFreeCertificateChain(&chain);
|
|
|
|
return raw_chain;
|
|
}
|
|
|
|
static bool certOpenEsCertSaveFile(void)
|
|
{
|
|
if (g_esCertSaveCtx) return true;
|
|
|
|
g_esCertSaveCtx = save_open_savefile(CERT_SAVEFILE_PATH, 0);
|
|
if (!g_esCertSaveCtx)
|
|
{
|
|
LOGFILE("Failed to open ES certificate system savefile!");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void certCloseEsCertSaveFile(void)
|
|
{
|
|
if (g_esCertSaveCtx)
|
|
{
|
|
save_close_savefile(g_esCertSaveCtx);
|
|
g_esCertSaveCtx = NULL;
|
|
}
|
|
}
|
|
|
|
static bool _certRetrieveCertificateByName(Certificate *dst, const char *name)
|
|
{
|
|
if (!g_esCertSaveCtx || !dst || !name || !strlen(name))
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
u64 cert_size = 0;
|
|
char cert_path[SAVE_FS_LIST_MAX_NAME_LENGTH] = {0};
|
|
allocation_table_storage_ctx_t fat_storage = {0};
|
|
|
|
snprintf(cert_path, SAVE_FS_LIST_MAX_NAME_LENGTH, "%s%s", CERT_SAVEFILE_STORAGE_BASE_PATH, name);
|
|
|
|
if (!save_get_fat_storage_from_file_entry_by_path(g_esCertSaveCtx, cert_path, &fat_storage, &cert_size))
|
|
{
|
|
LOGFILE("Failed to locate certificate \"%s\" in ES certificate system save!", name);
|
|
return false;
|
|
}
|
|
|
|
if (cert_size < CERT_MIN_SIZE || cert_size > CERT_MAX_SIZE)
|
|
{
|
|
LOGFILE("Invalid size for certificate \"%s\"! (0x%lX)", name, cert_size);
|
|
return false;
|
|
}
|
|
|
|
dst->size = cert_size;
|
|
|
|
u64 br = save_allocation_table_storage_read(&fat_storage, dst->data, 0, dst->size);
|
|
if (br != dst->size)
|
|
{
|
|
LOGFILE("Failed to read 0x%lX bytes from certificate \"%s\"! Read 0x%lX bytes.", dst->size, name, br);
|
|
return false;
|
|
}
|
|
|
|
dst->type = certGetCertificateType(dst->data, dst->size);
|
|
if (dst->type == CertType_None)
|
|
{
|
|
LOGFILE("Invalid certificate type for \"%s\"!", name);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static u8 certGetCertificateType(const void *data, u64 data_size)
|
|
{
|
|
if (!data || data_size < CERT_MIN_SIZE || data_size > CERT_MAX_SIZE)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return CertType_None;
|
|
}
|
|
|
|
u64 offset = 0;
|
|
u8 type = CertType_None;
|
|
const u8 *data_u8 = (const u8*)data;
|
|
u32 sig_type = 0, pub_key_type = 0;
|
|
|
|
memcpy(&sig_type, data_u8, sizeof(u32));
|
|
sig_type = __builtin_bswap32(sig_type);
|
|
|
|
switch(sig_type)
|
|
{
|
|
case SignatureType_Rsa4096Sha1:
|
|
case SignatureType_Rsa4096Sha256:
|
|
offset += sizeof(SignatureBlockRsa4096);
|
|
break;
|
|
case SignatureType_Rsa2048Sha1:
|
|
case SignatureType_Rsa2048Sha256:
|
|
offset += sizeof(SignatureBlockRsa2048);
|
|
break;
|
|
case SignatureType_Ecsda240Sha1:
|
|
case SignatureType_Ecsda240Sha256:
|
|
offset += sizeof(SignatureBlockEcsda240);
|
|
break;
|
|
default:
|
|
LOGFILE("Invalid signature type value! (0x%08X)", sig_type);
|
|
return type;
|
|
}
|
|
|
|
offset += MEMBER_SIZE(CertCommonBlock, issuer);
|
|
|
|
memcpy(&pub_key_type, data_u8 + offset, sizeof(u32));
|
|
pub_key_type = __builtin_bswap32(pub_key_type);
|
|
|
|
offset += MEMBER_SIZE(CertCommonBlock, pub_key_type);
|
|
offset += MEMBER_SIZE(CertCommonBlock, name);
|
|
offset += MEMBER_SIZE(CertCommonBlock, cert_id);
|
|
|
|
switch(pub_key_type)
|
|
{
|
|
case CertPubKeyType_Rsa4096:
|
|
offset += sizeof(CertPublicKeyBlockRsa4096);
|
|
break;
|
|
case CertPubKeyType_Rsa2048:
|
|
offset += sizeof(CertPublicKeyBlockRsa2048);
|
|
break;
|
|
case CertPubKeyType_Ecsda240:
|
|
offset += sizeof(CertPublicKeyBlockEcsda240);
|
|
break;
|
|
default:
|
|
LOGFILE("Invalid public key type value! (0x%08X)", pub_key_type);
|
|
return type;
|
|
}
|
|
|
|
if (offset != data_size)
|
|
{
|
|
LOGFILE("Calculated end offset doesn't match certificate size! (0x%lX != 0x%lX)", offset, data_size);
|
|
return type;
|
|
}
|
|
|
|
if (sig_type == SignatureType_Rsa4096Sha1 || sig_type == SignatureType_Rsa4096Sha256)
|
|
{
|
|
type = CERT_TYPE(Rsa4096);
|
|
} else
|
|
if (sig_type == SignatureType_Rsa2048Sha1 || sig_type == SignatureType_Rsa2048Sha256)
|
|
{
|
|
type = CERT_TYPE(Rsa2048);
|
|
} else
|
|
if (sig_type == SignatureType_Ecsda240Sha1 || sig_type == SignatureType_Ecsda240Sha256)
|
|
{
|
|
type = CERT_TYPE(Ecsda240);
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
static bool _certRetrieveCertificateChainBySignatureIssuer(CertificateChain *dst, const char *issuer)
|
|
{
|
|
if (!dst || !issuer || !strlen(issuer) || strncmp(issuer, "Root-", 5) != 0)
|
|
{
|
|
LOGFILE("Invalid parameters!");
|
|
return false;
|
|
}
|
|
|
|
u32 i = 0;
|
|
char issuer_copy[0x40] = {0};
|
|
bool success = true;
|
|
|
|
dst->count = certGetCertificateCountInSignatureIssuer(issuer);
|
|
if (!dst->count)
|
|
{
|
|
LOGFILE("Invalid signature issuer string!");
|
|
return false;
|
|
}
|
|
|
|
dst->certs = calloc(dst->count, sizeof(Certificate));
|
|
if (!dst->certs)
|
|
{
|
|
LOGFILE("Unable to allocate memory for the certificate chain! (0x%lX)", dst->count * sizeof(Certificate));
|
|
return false;
|
|
}
|
|
|
|
/* Copy string to avoid problems with strtok */
|
|
/* The "Root-" parent from the issuer string is skipped */
|
|
snprintf(issuer_copy, 0x40, issuer + 5);
|
|
|
|
char *pch = strtok(issuer_copy, "-");
|
|
while(pch != NULL)
|
|
{
|
|
if (!_certRetrieveCertificateByName(&(dst->certs[i]), pch))
|
|
{
|
|
LOGFILE("Unable to retrieve certificate \"%s\"!", pch);
|
|
success = false;
|
|
break;
|
|
}
|
|
|
|
i++;
|
|
pch = strtok(NULL, "-");
|
|
}
|
|
|
|
if (!success) certFreeCertificateChain(dst);
|
|
|
|
return success;
|
|
}
|
|
|
|
static u32 certGetCertificateCountInSignatureIssuer(const char *issuer)
|
|
{
|
|
if (!issuer || !strlen(issuer)) return 0;
|
|
|
|
u32 count = 0;
|
|
char issuer_copy[0x40] = {0};
|
|
|
|
/* Copy string to avoid problems with strtok */
|
|
/* The "Root-" parent from the issuer string is skipped */
|
|
snprintf(issuer_copy, 0x40, issuer + 5);
|
|
|
|
char *pch = strtok(issuer_copy, "-");
|
|
while(pch != NULL)
|
|
{
|
|
count++;
|
|
pch = strtok(NULL, "-");
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static u64 certCalculateRawCertificateChainSize(const CertificateChain *chain)
|
|
{
|
|
if (!chain || !chain->count || !chain->certs) return 0;
|
|
|
|
u64 chain_size = 0;
|
|
for(u32 i = 0; i < chain->count; i++) chain_size += chain->certs[i].size;
|
|
return chain_size;
|
|
}
|
|
|
|
static void certCopyCertificateChainDataToMemoryBuffer(void *dst, const CertificateChain *chain)
|
|
{
|
|
if (!chain || !chain->count || !chain->certs) return;
|
|
|
|
u8 *dst_u8 = (u8*)dst;
|
|
for(u32 i = 0; i < chain->count; i++)
|
|
{
|
|
memcpy(dst_u8, chain->certs[i].data, chain->certs[i].size);
|
|
dst_u8 += chain->certs[i].size;
|
|
}
|
|
}
|