Momentum-Apps/portal_of_flipper/xsm3/usbdsec.c

/*
    usbdsec.c - part of libxsm3
    Copyright (C) 2013 oct0xor
    Copyright (C) 2022 InvoxiPlayGames

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include <string.h>
#include <stdio.h>
#include "excrypt.h"

static uint8_t UsbdSecSboxData[256] __attribute__ ((aligned(4))) = {
	0xB0, 0x3D, 0x9B, 0x70, 0xF3, 0xC7, 0x80, 0x60,
	0x73, 0x9F, 0x6C, 0xC0, 0xF1, 0x3D, 0xBB, 0x40,
	0xB3, 0xC8, 0x37, 0x14, 0xDF, 0x49, 0xDA, 0xD4,
	0x48, 0x22, 0x78, 0x80, 0x6E, 0xCD, 0xE7, 0x00,
	0x81, 0x86, 0x68, 0xE1, 0x5D, 0x7C, 0x54, 0x2C,
	0x55, 0x7B, 0xEF, 0x48, 0x42, 0x7B, 0x3B, 0x68,
	0xE3, 0xDB, 0xAA, 0xC0, 0x0F, 0xA9, 0x96, 0x20,
	0x95, 0x05, 0x93, 0x94, 0x9A, 0xF6, 0xA3, 0x64,
	0x5D, 0xCC, 0x76, 0x00, 0xE5, 0x08, 0x19, 0xE8,
	0x8D, 0x29, 0xD7, 0x4C, 0x21, 0x91, 0x17, 0xF4,
	0xBC, 0x6A, 0xB3, 0x80, 0x83, 0xC6, 0xD4, 0x90,
	0x9B, 0xAE, 0x0E, 0xFE, 0x2E, 0x4A, 0xF2, 0x00,
	0x73, 0x88, 0xD9, 0x40, 0x66, 0xC5, 0xD4, 0x08,
	0x57, 0xB1, 0x89, 0x48, 0xDC, 0x54, 0xFC, 0x43,
	0x6A, 0x26, 0x87, 0xB8, 0x09, 0x5F, 0xCE, 0x80,
	0xE4, 0x0B, 0x05, 0x9C, 0x24, 0xF3, 0xDE, 0xE2,
	0x3E, 0xEC, 0x38, 0x8A, 0xA2, 0x55, 0xA4, 0x50,
	0x4E, 0x4B, 0xE9, 0x58, 0x7F, 0x9F, 0x7D, 0x80,
	0x23, 0x0C, 0x4D, 0x80, 0x05, 0x44, 0x26, 0xB8,
	0xE9, 0xD8, 0xBC, 0xE6, 0x76, 0x3A, 0x6E, 0xA4,
	0x19, 0xDE, 0xC2, 0xD0, 0xC4, 0xBC, 0xC3, 0x5C,
	0x59, 0xDF, 0x16, 0x46, 0x39, 0x70, 0xF4, 0xEE,
	0x2D, 0x58, 0x5A, 0xA8, 0x17, 0x86, 0x6B, 0x60,
	0x29, 0x58, 0x4D, 0xD2, 0x5F, 0x28, 0x7A, 0xD8,
	0x8E, 0x79, 0xEA, 0x82, 0x94, 0x33, 0x31, 0x81,
	0xD9, 0x22, 0xD5, 0x10, 0xDA, 0x92, 0xA0, 0x7D,
	0x3D, 0xDA, 0xAC, 0x1C, 0xA2, 0x53, 0x31, 0xB8,
	0x3C, 0x96, 0x52, 0x00, 0x82, 0x6B, 0x56, 0xA0,
	0xD3, 0xC2, 0x40, 0xC7, 0x1B, 0x7F, 0xDC, 0x01,
	0x72, 0x70, 0xB1, 0x8C, 0x01, 0x09, 0x09, 0x36,
	0xFC, 0x97, 0xEA, 0xDE, 0xE3, 0x0D, 0xAE, 0x7E,
	0xE3, 0x0D, 0xAE, 0x7E, 0x33, 0x69, 0x80, 0x40
};

static uint8_t UsbdSecPlainTextData[128] __attribute__ ((aligned(4))) = {
	0xD1, 0xD2, 0xF2, 0x80, 0x6E, 0xBA, 0x0C, 0xC0,
	0xB6, 0xC4, 0xC9, 0xD8, 0x61, 0x75, 0x1D, 0x1A,
	0x3F, 0x95, 0x58, 0xBE, 0xD8, 0x0D, 0xE2, 0xC0,
	0xD0, 0x21, 0x79, 0x20, 0x65, 0x2D, 0x99, 0x40,
	0x3C, 0x96, 0x52, 0x00, 0x1B, 0x7F, 0xDC, 0x01,
	0x82, 0x1C, 0x13, 0xD8, 0x33, 0x69, 0x80, 0x40,
	0xFC, 0x97, 0xEA, 0xDE, 0x08, 0xEA, 0x14, 0xDC,
	0xEB, 0x0F, 0x6A, 0x18, 0x6F, 0x78, 0x2C, 0xB0,
	0xD3, 0xC2, 0x40, 0xC7, 0x82, 0x6B, 0x56, 0xA0,
	0x19, 0x09, 0x36, 0xE0, 0x72, 0x70, 0xB1, 0x8C,
	0xE3, 0x0D, 0xAE, 0x7E, 0x50, 0xA5, 0x2B, 0xE2,
	0xC9, 0xAF, 0xC7, 0x70, 0x1C, 0x29, 0x80, 0x56,
	0x24, 0xF0, 0x66, 0xFA, 0x02, 0x2B, 0x58, 0x98,
	0x8F, 0xE4, 0xD1, 0x3C, 0x6E, 0x38, 0x2A, 0xFF,
	0xB8, 0xFA, 0x35, 0xB0, 0x52, 0x49, 0xC5, 0xB4,
	0x66, 0xFA, 0x47, 0x55, 0x6C, 0x8D, 0x40, 0x08
};

void UsbdSecXSM3AuthenticationCrypt(const uint8_t *key, const uint8_t *input, size_t length, uint8_t *output, uint8_t encrypt) {
	EXCRYPT_DES3_STATE des;
	uint64_t sk[3];
	uint8_t iv[8];

	// clear local variables
    memset(iv, 0, sizeof(iv));
	// run parity on the key
	ExCryptDesParity(key, 0x10, (uint8_t *)sk);
	sk[2] = sk[0];
	// set the key in the state and run triple-des cbc en/decryption on it
	ExCryptDes3Key(&des, sk);
	ExCryptDes3Cbc(&des, input, length, output, iv, encrypt);
}

void UsbdSecXSM3AuthenticationMac(const uint8_t *key, uint8_t *salt, uint8_t *input, size_t length, uint8_t *output) {
	EXCRYPT_DES3_STATE des3;
	EXCRYPT_DES_STATE des;
	uint64_t sk[3];
	uint8_t iv[8];
	uint8_t temp[8];
	uint64_t input_temp;
	size_t i;

	// clear iv + temp value of stack junk
	memset(iv, 0, sizeof(iv));
	memset(temp, 0, sizeof(temp));
	// run parity on the key
	ExCryptDesParity(key, 0x10, (uint8_t *)sk);
	sk[2] = sk[0];
	// set the key in our initial des state
	ExCryptDesKey(&des, (uint8_t *)&sk[0]);
	// if we have a salt, encrypt it into the temp value
	if (salt) {
		memcpy(&input_temp, salt, sizeof(input_temp));
		input_temp = SWAP64(SWAP64(input_temp) + 1);
		memcpy(salt, &input_temp, sizeof(input_temp)); // no idea what this does
		ExCryptDesEcb(&des, salt, temp, 1);
	}
	// for every 8 byte input block, xor the temp value with it and encrypt over itself
	for (i = 0; i < length; i += 8) {
		memcpy(&input_temp, input+i, sizeof(input_temp));
		*(uint64_t *)temp ^= input_temp;
		
		ExCryptDesEcb(&des, temp, temp, 1);
	}
	// xor the highest bit of the temp value
	temp[0] ^= 0x80;
	// set the key and perform the final triple-des encryption
	ExCryptDes3Key(&des3, sk);
	ExCryptDes3Cbc(&des3, temp, 8, output, iv, 1);
	// real kernel does the following, but the above works:
	// XeCryptDesEcb(des_state_1, temp, temp, 1);
	// XeCryptDesEcb(des_state_2, temp, temp, 0);
	// XeCryptDesEcb(des_state_1, temp, output, 1);
}

void UsbdSecXSMAuthenticationAcr(const uint8_t *console_id, const uint8_t *input, const uint8_t *key, uint8_t *output) {
	uint8_t block[8];
	uint8_t iv[8];
	uint8_t ab[8];
	uint8_t cd[8];

	// fill in the input block with the first 4 bytes of input data and the first 4 bytes of the console ID
	// *(uint32_t *)block = *(uint32_t *)input;
	// *(uint32_t *)(block + 4) = *(uint32_t *)console_id;
	memcpy(block, input, 4);
	memcpy(block+4, console_id, 4);
	// run custom "parve" crypto algorithms. idk whar they do
	ExCryptParveEcb(key, UsbdSecSboxData, input + 0x10, iv);
	ExCryptParveEcb(key, UsbdSecSboxData, block, cd);
	ExCryptParveCbcMac(key, UsbdSecSboxData, iv, UsbdSecPlainTextData, 0x80, ab);
	ExCryptChainAndSumMac((uint32_t *)cd, (uint32_t *)ab, (uint32_t *)UsbdSecPlainTextData, 0x20, (uint32_t *)output);
	uint64_t current;
	memcpy(&current, output, sizeof(current));
	current ^= *(uint64_t *)ab;
	// *(uint64_t *)output ^= *(uint64_t *)ab;
	memcpy(output, &current, sizeof(current));
}