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[ctrtool] Rewrote NCCH crypto. "--exefs" is still broken.

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This commit is contained in:
jakcron
2017-06-05 11:32:13 +08:00
parent 56ef8b41d1
commit b8b92d8bfa
4 changed files with 173 additions and 162 deletions
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ctrtool/exefs.c
+12 -14
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@@ -48,10 +48,10 @@ void exefs_set_encrypted(exefs_context* ctx, u32 encrypted)
ctx->encrypted = encrypted;
}
void exefs_set_keys(exefs_context* ctx, u8 key[16], u8 special_key[16])
void exefs_set_keys(exefs_context* ctx, u8 key0[16], u8 key1[16])
{
memcpy(ctx->key, key, 16);
memcpy(ctx->special_key, special_key, 16);
memcpy(ctx->key[0], key0, 16);
memcpy(ctx->key[1], key1, 16);
}
void exefs_set_counter(exefs_context* ctx, u8 counter[16])
@@ -109,7 +109,7 @@ void exefs_save(exefs_context* ctx, u32 index, u32 flags)
}
fseeko64(ctx->file, ctx->offset + offset, SEEK_SET);
ctr_init_key(&ctx->aes, ctx->key);
ctr_init_key(&ctx->aes, ctx->key[0]);
ctr_init_counter(&ctx->aes, ctx->counter);
ctr_add_counter(&ctx->aes, offset / 0x10);
@@ -132,12 +132,10 @@ void exefs_save(exefs_context* ctx, u32 index, u32 flags)
}
if (ctx->encrypted) {
// .code and .firm use a special key on 7.0+
if (ctx->encrypted & NCCHCRYPTO_SPECIAL_FSES)
ctr_init_key(&ctx->aes, ctx->special_key);
ctr_crypt_counter(&ctx->aes, compressedbuffer, compressedbuffer, compressedsize);
if (ctx->encrypted & NCCHCRYPTO_SPECIAL_FSES)
ctr_init_key(&ctx->aes, ctx->key);
if (strncmp((const char*)section->name, "icon", 8) == 0 || strncmp((const char*)section->name, "banner", 8) == 0)
ctr_init_key(&ctx->aes, ctx->key[0]);
else
ctr_init_key(&ctx->aes, ctx->key[1]);
}
@@ -203,7 +201,7 @@ void exefs_read_header(exefs_context* ctx, u32 flags)
fread(&ctx->header, 1, sizeof(exefs_header), ctx->file);
if (ctx->encrypted) {
ctr_init_key(&ctx->aes, ctx->key);
ctr_init_key(&ctx->aes, ctx->key[0]);
ctr_init_counter(&ctx->aes, ctx->counter);
ctr_crypt_counter(&ctx->aes, (u8*)&ctx->header, (u8*)&ctx->header, sizeof(exefs_header));
}
@@ -261,10 +259,10 @@ int exefs_verify(exefs_context* ctx, u32 index, u32 flags)
return 0;
fseeko64(ctx->file, ctx->offset + offset, SEEK_SET);
if (index == 0 && (ctx->encrypted & NCCHCRYPTO_SPECIAL_FSES))
ctr_init_key(&ctx->aes, ctx->special_key);
if (strncmp((const char*)section->name, "icon", 8) == 0 || strncmp((const char*)section->name, "banner", 8) == 0)
ctr_init_key(&ctx->aes, ctx->key[0]);
else
ctr_init_key(&ctx->aes, ctx->key);
ctr_init_key(&ctx->aes, ctx->key[1]);
ctr_init_counter(&ctx->aes, ctx->counter);
ctr_add_counter(&ctx->aes, offset / 0x10);