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hactool: fix compatbility with chinese gamecards
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@SciresM
SciresM committed Apr 6, 2020
1 parent eeeee7c commit a98e95b
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Showing 6 changed files with 110 additions and 29 deletions.
2 changes: 1 addition & 1 deletion hfs0.c
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Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,7 @@ void hfs0_print(hfs0_ctx_t *ctx) {
for (unsigned int i = 0; i < ctx->header->num_files; i++) {
hfs0_file_entry_t *cur_file = hfs0_get_file_entry(ctx->header, i);
if (ctx->tool_ctx->action & ACTION_VERIFY) {
validity_t hash_validity = check_memory_hash_table(ctx->file, cur_file->hash, ctx->offset + hfs0_get_header_size(ctx->header) + cur_file->offset, cur_file->hashed_size, cur_file->hashed_size, 0);
validity_t hash_validity = check_memory_hash_table_with_suffix(ctx->file, cur_file->hash, ctx->offset + hfs0_get_header_size(ctx->header) + cur_file->offset, cur_file->hashed_size, cur_file->hashed_size, ctx->hash_suffix, 0);
printf("%s%s:/%-48s %012"PRIx64"-%012"PRIx64" (%s)\n", i == 0 ? " " : " ", ctx->name == NULL ? "hfs0" : ctx->name, hfs0_get_file_name(ctx->header, i), cur_file->offset, cur_file->offset + cur_file->size, GET_VALIDITY_STR(hash_validity));
} else {
printf("%s%s:/%-48s %012"PRIx64"-%012"PRIx64"\n", i == 0 ? " " : " ", ctx->name == NULL ? "hfs0" : ctx->name, hfs0_get_file_name(ctx->header, i), cur_file->offset, cur_file->offset + cur_file->size);
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1 change: 1 addition & 0 deletions hfs0.h
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ typedef struct {
hactool_ctx_t *tool_ctx;
hfs0_header_t *header;
const char *name;
const uint8_t *hash_suffix;
} hfs0_ctx_t;

static inline hfs0_file_entry_t *hfs0_get_file_entry(hfs0_header_t *hdr, uint32_t i) {
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47 changes: 47 additions & 0 deletions utils.c
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Original file line number Diff line number Diff line change
Expand Up @@ -153,7 +153,54 @@ validity_t check_memory_hash_table(FILE *f_in, unsigned char *hash_table, uint64
free(block);

return result;
}

validity_t check_memory_hash_table_with_suffix(FILE *f_in, unsigned char *hash_table, uint64_t data_ofs, uint64_t data_len, uint64_t block_size, const uint8_t *suffix, int full_block) {
if (block_size == 0) {
/* Block size of 0 is always invalid. */
return VALIDITY_INVALID;
}

unsigned char cur_hash[0x20];
uint64_t read_size = block_size;
unsigned char *block = malloc(block_size);
if (block == NULL) {
fprintf(stderr, "Failed to allocate hash block!\n");
exit(EXIT_FAILURE);
}

validity_t result = VALIDITY_VALID;
unsigned char *cur_hash_table_entry = hash_table;
for (uint64_t ofs = 0; ofs < data_len; ofs += read_size) {
fseeko64(f_in, ofs + data_ofs, SEEK_SET);
if (ofs + read_size > data_len) {
/* Last block... */
memset(block, 0, read_size);
read_size = data_len - ofs;
}

if (fread(block, 1, read_size, f_in) != read_size) {
fprintf(stderr, "Failed to read file!\n");
exit(EXIT_FAILURE);
}
{
sha_ctx_t *sha_ctx = new_sha_ctx(HASH_TYPE_SHA256, 0);
sha_update(sha_ctx, block, full_block ? block_size : read_size);
if (suffix) {
sha_update(sha_ctx, suffix, sizeof(*suffix));
}
sha_get_hash(sha_ctx, cur_hash);
free_sha_ctx(sha_ctx);
}
if (memcmp(cur_hash, cur_hash_table_entry, 0x20) != 0) {
result = VALIDITY_INVALID;
break;
}
cur_hash_table_entry += 0x20;
}
free(block);

return result;
}

validity_t check_file_hash_table(FILE *f_in, uint64_t hash_ofs, uint64_t data_ofs, uint64_t data_len, uint64_t block_size, int full_block) {
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2 changes: 2 additions & 0 deletions utils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,8 @@ FILE *open_key_file(const char *prefix);
validity_t check_memory_hash_table(FILE *f_in, unsigned char *hash_table, uint64_t data_ofs, uint64_t data_len, uint64_t block_size, int full_block);
validity_t check_file_hash_table(FILE *f_in, uint64_t hash_ofs, uint64_t data_ofs, uint64_t data_len, uint64_t block_size, int full_block);

validity_t check_memory_hash_table_with_suffix(FILE *f_in, unsigned char *hash_table, uint64_t data_ofs, uint64_t data_len, uint64_t block_size, const uint8_t *suffix, int full_block);

#ifdef _MSC_VER
inline int fseeko64(FILE *__stream, long long __off, int __whence)
{
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85 changes: 57 additions & 28 deletions xci.c
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Original file line number Diff line number Diff line change
Expand Up @@ -45,10 +45,47 @@ void xci_process(xci_ctx_t *ctx) {
}
}

ctx->hfs0_hash_validity = check_memory_hash_table(ctx->file, ctx->header.hfs0_header_hash, ctx->header.hfs0_offset, ctx->header.hfs0_header_size, ctx->header.hfs0_header_size, 0);
if (ctx->hfs0_hash_validity != VALIDITY_VALID) {
fprintf(stderr, "Error: XCI partition is corrupt!\n");
exit(EXIT_FAILURE);
for (unsigned int i = 0; i < 0x10; i++) {
ctx->iv[i] = ctx->header.reversed_iv[0xF-i];
}


// try to decrypt header data
unsigned char null_key[0x10];
memset(null_key, 0x00, 0x10);
// test if the xci header key is set
if (memcmp(ctx->tool_ctx->settings.keyset.xci_header_key, null_key, 0x10) != 0) {
aes_ctx_t *aes_ctx = new_aes_ctx(ctx->tool_ctx->settings.keyset.xci_header_key, 0x10, AES_MODE_CBC);
aes_setiv(aes_ctx, ctx->iv, 0x10);

aes_decrypt(aes_ctx, ctx->decrypted_header, ctx->header.encrypted_data, 0x70);

ctx->has_decrypted_header = 1;
} else {
ctx->has_decrypted_header = 0;
}

const uint8_t *compatiblity_type_ptr = NULL;
ctx->has_fake_compat_type = 0;
ctx->fake_compat_type = COMPAT_GLOBAL;
if (ctx->has_decrypted_header) {
xci_gamecard_info_t *gc_info = (xci_gamecard_info_t*)(ctx->decrypted_header + 0x10);
if (gc_info->compatibility_type != 0) {
compatiblity_type_ptr = &gc_info->compatibility_type;
}
ctx->hfs0_hash_validity = check_memory_hash_table_with_suffix(ctx->file, ctx->header.hfs0_header_hash, ctx->header.hfs0_offset, ctx->header.hfs0_header_size, ctx->header.hfs0_header_size, compatiblity_type_ptr, 0);
} else {
ctx->hfs0_hash_validity = check_memory_hash_table_with_suffix(ctx->file, ctx->header.hfs0_header_hash, ctx->header.hfs0_offset, ctx->header.hfs0_header_size, ctx->header.hfs0_header_size, compatiblity_type_ptr, 0);
if (ctx->hfs0_hash_validity != VALIDITY_VALID) {
ctx->has_fake_compat_type = 1;
ctx->fake_compat_type = COMPAT_CHINA;
compatiblity_type_ptr = &ctx->fake_compat_type;
ctx->hfs0_hash_validity = check_memory_hash_table_with_suffix(ctx->file, ctx->header.hfs0_header_hash, ctx->header.hfs0_offset, ctx->header.hfs0_header_size, ctx->header.hfs0_header_size, compatiblity_type_ptr, 0);
}
if (ctx->hfs0_hash_validity != VALIDITY_VALID) {
fprintf(stderr, "Error: XCI partition is corrupt!\n");
exit(EXIT_FAILURE);
}
}

hactool_ctx_t blank_ctx;
Expand Down Expand Up @@ -90,28 +127,10 @@ void xci_process(xci_ctx_t *ctx) {
cur_ctx->offset = ctx->partition_ctx.offset + hfs0_get_header_size(ctx->partition_ctx.header) + cur_file->offset;
cur_ctx->tool_ctx = &blank_ctx;
cur_ctx->file = ctx->file;
cur_ctx->hash_suffix = compatiblity_type_ptr;
hfs0_process(cur_ctx);
}

for (unsigned int i = 0; i < 0x10; i++) {
ctx->iv[i] = ctx->header.reversed_iv[0xF-i];
}

// try to decrypt header data
unsigned char null_key[0x10];
memset(null_key, 0x00, 0x10);
// test if the xci header key is set
if (memcmp(ctx->tool_ctx->settings.keyset.xci_header_key, null_key, 0x10) != 0) {
aes_ctx_t *aes_ctx = new_aes_ctx(ctx->tool_ctx->settings.keyset.xci_header_key, 0x10, AES_MODE_CBC);
aes_setiv(aes_ctx, ctx->iv, 0x10);

aes_decrypt(aes_ctx, ctx->decrypted_header, ctx->header.encrypted_data, 0x70);

ctx->has_decrypted_header = 1;
} else {
ctx->has_decrypted_header = 0;
}


if (ctx->tool_ctx->action & ACTION_INFO) {
xci_print(ctx);
Expand Down Expand Up @@ -236,8 +255,8 @@ static const char *xci_get_access_control_type(xci_gamecard_info_t *gc_info) {
}
}

static const char *xci_get_region_compatibility_type(xci_gamecard_info_t *gc_info) {
xci_region_compatibility_t compatibility_type = (xci_region_compatibility_t)gc_info->compatibility_type;
static const char *xci_get_region_compatibility_type_name(uint8_t _type) {
xci_region_compatibility_t compatibility_type = (xci_region_compatibility_t)_type;
switch (compatibility_type) {
case COMPAT_GLOBAL: return "Global";
case COMPAT_CHINA: return "China";
Expand All @@ -246,6 +265,10 @@ static const char *xci_get_region_compatibility_type(xci_gamecard_info_t *gc_inf
}
}

static const char *xci_get_region_compatibility_type(xci_gamecard_info_t *gc_info) {
return xci_get_region_compatibility_type_name(gc_info->compatibility_type);
}

static void xci_print_hfs0(hfs0_ctx_t *ctx) {
print_magic(" Magic: ", ctx->header->magic);
printf(" Offset: %012"PRIx64"\n", ctx->offset);
Expand All @@ -256,7 +279,7 @@ static void xci_print_hfs0(hfs0_ctx_t *ctx) {
for (unsigned int i = 0; i < ctx->header->num_files; i++) {
hfs0_file_entry_t *cur_file = hfs0_get_file_entry(ctx->header, i);
if (ctx->tool_ctx->action & ACTION_VERIFY) {
validity_t hash_validity = check_memory_hash_table(ctx->file, cur_file->hash, ctx->offset + hfs0_get_header_size(ctx->header) + cur_file->offset, cur_file->hashed_size, cur_file->hashed_size, 0);
validity_t hash_validity = check_memory_hash_table_with_suffix(ctx->file, cur_file->hash, ctx->offset + hfs0_get_header_size(ctx->header) + cur_file->offset, cur_file->hashed_size, cur_file->hashed_size, ctx->hash_suffix, 0);
printf("%s%s:/%-48s %012"PRIx64"-%012"PRIx64" (%s)\n", i == 0 ? " " : " ", ctx->name == NULL ? "hfs0" : ctx->name, hfs0_get_file_name(ctx->header, i), cur_file->offset, cur_file->offset + cur_file->size, GET_VALIDITY_STR(hash_validity));
} else {
printf("%s%s:/%-48s %012"PRIx64"-%012"PRIx64"\n", i == 0 ? " " : " ", ctx->name == NULL ? "hfs0" : ctx->name, hfs0_get_file_name(ctx->header, i), cur_file->offset, cur_file->offset + cur_file->size);
Expand Down Expand Up @@ -284,6 +307,12 @@ void xci_print(xci_ctx_t *ctx) {

memdump(stdout, "Header IV: ", ctx->iv, 0x10);
memdump(stdout, "Encrypted Header: ", ctx->header.encrypted_data, 0x70);

if (ctx->has_fake_compat_type || !ctx->has_decrypted_header) {
printf("Encrypted Header Data:\n");
printf(" Compatibility Type: %s\n", xci_get_region_compatibility_type_name(ctx->fake_compat_type));
}

if (ctx->has_decrypted_header) {
xci_gamecard_info_t *gc_info = (xci_gamecard_info_t*)(ctx->decrypted_header + 0x10);
printf("Encrypted Header Data:\n");
Expand All @@ -303,9 +332,9 @@ void xci_print(xci_ctx_t *ctx) {
ver[3] = (gc_info->cup_version & 0xffff);

printf(" CUP Version v%d.%d.%d-%d\n", ver[0], ver[1], ver[2], ver[3]);
printf(" Compatibility Type %s\n", xci_get_region_compatibility_type(gc_info)); //%02"PRIx8"\n", gc_info->compatibility_type);
printf(" Compatibility Type: %s\n", xci_get_region_compatibility_type(gc_info)); //%02"PRIx8"\n", gc_info->compatibility_type);
memdump(stdout, " Update Hash ", gc_info->update_partition_hash, 8);
printf(" CUP TitleId %016"PRIx64"\n", gc_info->cup_title_id);
printf(" CUP TitleId: %016"PRIx64"\n", gc_info->cup_title_id);
}

if (ctx->tool_ctx->action & ACTION_VERIFY) {
Expand Down
2 changes: 2 additions & 0 deletions xci.h
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,8 @@ typedef struct {
int has_decrypted_header;
unsigned char decrypted_header[0x70];
xci_header_t header;
int has_fake_compat_type;
uint8_t fake_compat_type;
} xci_ctx_t;

void xci_process(xci_ctx_t *ctx);
Expand Down

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