Exemplo n.º 1
0
        private void DerivePerConsoleKeys()
        {
            var kek = new byte[0x10];

            // Derive the device key
            if (!PerConsoleKeySource.IsEmpty() && !KeyblobKeys[0].IsEmpty())
            {
                Crypto.DecryptEcb(KeyblobKeys[0], PerConsoleKeySource, DeviceKey, 0x10);
            }

            // Derive save key
            if (!SaveMacKekSource.IsEmpty() && !SaveMacKeySource.IsEmpty() && !DeviceKey.IsEmpty())
            {
                Crypto.GenerateKek(DeviceKey, SaveMacKekSource, kek, AesKekGenerationSource, null);
                Crypto.DecryptEcb(kek, SaveMacKeySource, SaveMacKey, 0x10);
            }

            // Derive BIS keys
            if (DeviceKey.IsEmpty() ||
                BisKekSource.IsEmpty() ||
                AesKekGenerationSource.IsEmpty() ||
                AesKeyGenerationSource.IsEmpty() ||
                RetailSpecificAesKeySource.IsEmpty())
            {
                return;
            }

            // If the user doesn't provide bis_key_source_03 we can assume it's the same as bis_key_source_02
            if (BisKeySource[3].IsEmpty() && !BisKeySource[2].IsEmpty())
            {
                Array.Copy(BisKeySource[2], BisKeySource[3], 0x20);
            }

            Crypto.DecryptEcb(DeviceKey, RetailSpecificAesKeySource, kek, 0x10);
            if (!BisKeySource[0].IsEmpty())
            {
                Crypto.DecryptEcb(kek, BisKeySource[0], BisKeys[0], 0x20);
            }

            Crypto.GenerateKek(DeviceKey, BisKekSource, kek, AesKekGenerationSource, AesKeyGenerationSource);

            for (int i = 1; i < 4; i++)
            {
                if (!BisKeySource[i].IsEmpty())
                {
                    Crypto.DecryptEcb(kek, BisKeySource[i], BisKeys[i], 0x20);
                }
            }
        }
Exemplo n.º 2
0
        private void DerivePerConsoleKeys()
        {
            var kek = new byte[0x10];

            // Derive the device key
            if (!PerConsoleKeySource.IsEmpty() && !KeyblobKeys[0].IsEmpty())
            {
                Crypto.DecryptEcb(KeyblobKeys[0], PerConsoleKeySource, DeviceKey, 0x10);
            }

            // Derive save key
            if (!SaveMacKekSource.IsEmpty() && !SaveMacKeySource.IsEmpty() && !DeviceKey.IsEmpty())
            {
                Crypto.GenerateKek(DeviceKey, SaveMacKekSource, kek, AesKekGenerationSource, null);
                Crypto.DecryptEcb(kek, SaveMacKeySource, SaveMacKey, 0x10);
            }

            // Derive BIS keys
            if (DeviceKey.IsEmpty() ||
                BisKeySource[0].IsEmpty() ||
                BisKeySource[1].IsEmpty() ||
                BisKeySource[2].IsEmpty() ||
                BisKekSource.IsEmpty() ||
                AesKekGenerationSource.IsEmpty() ||
                AesKeyGenerationSource.IsEmpty() ||
                RetailSpecificAesKeySource.IsEmpty())
            {
                return;
            }

            Crypto.DecryptEcb(DeviceKey, RetailSpecificAesKeySource, kek, 0x10);
            Crypto.DecryptEcb(kek, BisKeySource[0], BisKeys[0], 0x20);

            Crypto.GenerateKek(DeviceKey, BisKekSource, kek, AesKekGenerationSource, AesKeyGenerationSource);

            Crypto.DecryptEcb(kek, BisKeySource[1], BisKeys[1], 0x20);
            Crypto.DecryptEcb(kek, BisKeySource[2], BisKeys[2], 0x20);

            // BIS keys 2 and 3 are the same
            Array.Copy(BisKeys[2], BisKeys[3], 0x20);
        }