void CryptNcchRegion(u8 *buffer, u64 size, u64 src_pos, u64 titleId, u8 key[16], u8 type)
{
u8 ctr[0x10];
GetNcchAesCounter(ctr,titleId,type);
AesCtrCrypt(key,ctr,buffer,buffer,size,src_pos);
return;
}
void CryptNcchRegion(u8 *buffer, u64 size, u64 src_pos, ncch_info *ctx, u8 key[16], u8 type)
{
if(type < 1 || type > 3)
return;
u8 counter[0x10];
ctr_aes_context aes_ctx;
memset(&aes_ctx,0x0,sizeof(ctr_aes_context));
GetNcchAesCounter(ctx,counter,type);
ctr_init_counter(&aes_ctx, key, counter);
if(src_pos > 0){
u32 carry = 0;
carry = align(src_pos,0x10);
carry /= 0x10;
ctr_add_counter(&aes_ctx,carry);
}
ctr_crypt_counter(&aes_ctx, buffer, buffer, size);
return;
}
