int EncryptTitleKey(u8 EncTitleKey[0x10], u8 *DecTitleKey, u8 *CommonKey, u8 *TitleID)
{
//generating IV
u8 iv[16];
memset(&iv,0x0,16);
memcpy(iv,TitleID,0x8);
//Encrypting titlekey
ctr_aes_context ctx;
memset(&ctx,0x0,sizeof(ctr_aes_context));
ctr_init_aes_cbc(&ctx,CommonKey,iv,ENC);
ctr_aes_cbc(&ctx,DecTitleKey,EncTitleKey,0x10,ENC);
//checking titlekey encrypted properly
u8 tmp[0x10];
ctr_init_aes_cbc(&ctx,CommonKey,iv,DEC);
ctr_aes_cbc(&ctx,EncTitleKey,tmp,0x10,DEC);
/**
memdump(stdout, "TitleKey: ", DecTitleKey, 0x10);
memdump(stdout, "Enc_TitleKey: ", EncTitleKey, 0x10);
memdump(stdout, "Dec_TitleKey: ", tmp, 0x10);
**/
return memcmp(DecTitleKey,tmp,0x10);
}
int GenAESMAC(u8 KeyX[16], u8 KeyY[16], AESMAC_CTX *ctx)
{
/* Generating Hash for AES MAC */
u8 result = PrepAESMAC(ctx);
if(result)
return result;
/* Preparing for Crypto functions */
u8 *encrypted_hash = malloc(0x20);
u8 *outkey = malloc(16);
u8 IV[16];
memset(encrypted_hash,0,0x20);
memset(outkey,0,16);
memset(&IV,0,16);
/* Getting Key for AES MAC */
ctr_keyscrambler(outkey,KeyX,KeyY); //Not implemented yet, as no one knows that. ATM, it's a placeholder keyscrambler for testing.
/* Crypting hash */
ctr_aes_context aes_cbc;
ctr_init_aes_cbc(&aes_cbc,outkey,IV,ENC);
ctr_aes_cbc(&aes_cbc,ctx->hash,encrypted_hash,0x20,ENC);
if(ctx->Verbose){
memdump(stdout," KeyX: ",KeyX,16);
memdump(stdout," KeyY: ",KeyY,16);
memdump(stdout," Normal Key: ",outkey,16);
memdump(stdout," Hash For MAC: ",ctx->hash,0x20);
memdump(stdout," MAC: ",encrypted_hash+0x10,16);
}
/* Writing AES MAC to context */
memcpy(ctx->aesmac,encrypted_hash+0x10,16);
free(outkey);
free(encrypted_hash);
return 0;
}