encryption

package
v0.0.0-...-3a25cc1 Latest Latest
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 Go to latest Published: Oct 9, 2023 License: MIT Imports: 8 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	MangleIndexNormalKey0 = iota
	MangleIndexNormalKey1
	MangleIndexNormalKey2
	MangleIndexNormalKey3
	MangleIndexNormalKey4
	MangleIndexNormalKey5
	MangleIndexNormalKey6
	MangleIndexNormalKey7

	MangleIndexAlternateKey0
	MangleIndexAlternateKey1
	MangleIndexAlternateKey2
	MangleIndexAlternateKey3
	MangleIndexAlternateKey4
	MangleIndexAlternateKey5
	MangleIndexAlternateKey6
	MangleIndexAlternateKey7

	MangleIndexDeviceKey = 0xffff
)
View Source 
const (
	OuterMangleKeyOffsetDefault  = 0
	OuterMangleKeyOffsetFlash    = OuterMangleKeyOffsetDefault
	OuterMangleKeyOffsetDeviceId = 1
	OuterMangleKeyOffsetMemory   = 6
)
View Source 
const BorlandRandAddend uint32 = 1
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const BorlandRandModulus = 0xFFFFFFFF
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const BorlandRandMultiplier uint32 = 0x015A4E35

BorlandRandMultiplier 22695477

View Source 
const BorlandRandMultiplierInverse uint32 = 0x2925141D

BorlandRandMultiplierInverse Calculated using math.ModularMultiplicativeInverseFixed(uint32(BorlandRandMultiplier))

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const BorlandRandOutputMask uint32 = 0x7FFF
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const BorlandRandOutputShift = 16
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const EncryptedBlockCRC1Offset = EncryptedBlockMangleKeyOffset + MangleKeyDataSize
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const EncryptedBlockCRC2Offset = EncryptedBlockCRC1Offset + 4
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const EncryptedBlockKeySize = 512
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const EncryptedBlockMangleIndexOffset = 0
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const EncryptedBlockMangleKeyOffset = EncryptedBlockMangleIndexOffset + 2
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const EncryptedBlockPaddingKeyOffset = EncryptedBlockCRC2Offset + 4
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const JavaRandAddend uint64 = 11
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const JavaRandModulus = (1 << 48) - 1
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const JavaRandMultiplier uint64 = 0x5DEECE66D

JavaRandMultiplier 25214903917

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const JavaRandMultiplierInverse uint64 = 0xdfe05bcb1365

JavaRandMultiplierInverse Calculated using math.ModularMultiplicativeInverseBits(uint64(JavaRandMultiplier), 48)

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const JavaRandOutputMask uint64 = 0xFFFF
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const JavaRandOutputShift = 48 - 16
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const MangleKeyBlockSize = 8
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const MangleKeyDataSize = 4 * 4
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const MangleKeyRounds = 48

Variables

View Source 
var AlternateMangleTable = MangleKeyTable{
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
}
View Source 
var HardcodedMangleTable = MangleKeyTable{

	{0x6f, 0xc0, 0x39, 0x05, 0x01, 0x58, 0x23, 0x3a, 0x80, 0xda, 0xb4, 0x1b, 0x65, 0x6a, 0x91, 0x44},

	{0x35, 0xcb, 0x01, 0x5b, 0xfb, 0xa4, 0x98, 0xb4, 0x82, 0x6d, 0x48, 0xe9, 0x10, 0x50, 0x94, 0xf4},
	{0xec, 0xbc, 0xba, 0xe8, 0xf8, 0x3d, 0xa7, 0x2a, 0x9c, 0xf7, 0xf9, 0x4c, 0xe7, 0x73, 0x6d, 0x88},
	{0x03, 0x35, 0x48, 0x25, 0xaf, 0xa8, 0xa0, 0xb1, 0xb2, 0x45, 0xa7, 0x24, 0x39, 0x13, 0xe2, 0xf5},
	{0x88, 0x90, 0xd8, 0x42, 0xaf, 0x79, 0xa3, 0x37, 0xe0, 0x89, 0x26, 0x42, 0xe9, 0x39, 0x62, 0x63},
	{0xf0, 0x61, 0xd0, 0xab, 0x79, 0x05, 0x71, 0x7f, 0x51, 0x6b, 0x62, 0xbd, 0x15, 0x2c, 0xf2, 0x2a},

	{0x06, 0xbc, 0x41, 0xb3, 0x74, 0x46, 0x6e, 0x6e, 0x01, 0x7b, 0xeb, 0xb3, 0x32, 0x5b, 0x96, 0xf1},
	{0x6f, 0x3e, 0xf3, 0x52, 0xf9, 0xa2, 0x69, 0x4d, 0xc4, 0x77, 0xab, 0x77, 0x08, 0x45, 0x8f, 0x46},
}

Functions

func BorlandRand 

func BorlandRand(seed uint32) (newSeed uint32, output uint16)

BorlandRand Borland C++ rand()

func BorlandRandNextSeed 

func BorlandRandNextSeed(seed uint32) uint32

func BorlandRandOutput 

func BorlandRandOutput(seed uint32) uint16

func BorlandRandPreviousSeed 

func BorlandRandPreviousSeed(seed uint32) uint32

func BorlandRandXORBytes 

func BorlandRandXORBytes(src, dst []byte, seed uint32) (newSeed uint32)

func BorlandRandXORInPlace 

func BorlandRandXORInPlace(data []byte, seed uint32) (newSeed uint32)

func BorlandRandXORUint32 

func BorlandRandXORUint32(value, seed uint32) (newValue, newSeed uint32)

func BruteforceBorlandSeed 

func BruteforceBorlandSeed(b EncryptedBlock, material KeyMaterial) ([]uint32, error)

func BruteforceBorlandSeedBytes 

func BruteforceBorlandSeedBytes(b EncryptedBlock, material KeyMaterial) ([]uint32, error)

func DecryptDeviceCode 

func DecryptDeviceCode(deviceId DeviceId, code []byte) []byte

DecryptDeviceCode Decrypts code specifically encrypted to only work on a specific device id

func EncryptDeviceCode 

func EncryptDeviceCode(deviceId DeviceId, code []byte) []byte

EncryptDeviceCode Encrypt code specifically encrypted to only work on a specific device id

func IsKeyBorlandSeedLikely 

func IsKeyBorlandSeedLikely(b EncryptedBlock, material KeyMaterial) bool

IsKeyBorlandSeedLikely The generator used on BorlandRand does not set the highest bit, as such it can be detected

func JavaRand 

func JavaRand(seed uint64) (newSeed uint64, output uint16)

JavaRand Borland java.util.Random

func JavaRandNextSeed 

func JavaRandNextSeed(seed uint64) uint64

func JavaRandOutput 

func JavaRandOutput(seed uint64) uint16

func JavaRandOutputBits 

func JavaRandOutputBits(seed uint64, bits int) uint64

func JavaRandPreviousSeed 

func JavaRandPreviousSeed(seed uint64) uint64

Types

type BorlandRandByteKeyGenerator 

type BorlandRandByteKeyGenerator uint32

BorlandRandByteKeyGenerator Generates random numbers with its value as current seed

func (*BorlandRandByteKeyGenerator) FillKeyBlock 

func (g *BorlandRandByteKeyGenerator) FillKeyBlock(data []byte)

func (*BorlandRandByteKeyGenerator) MangleIndex 

func (g *BorlandRandByteKeyGenerator) MangleIndex() uint32

type BorlandRandKeyGenerator 

type BorlandRandKeyGenerator uint32

BorlandRandKeyGenerator Generates random numbers with its value as current seed

func (*BorlandRandKeyGenerator) FillKeyBlock 

func (g *BorlandRandKeyGenerator) FillKeyBlock(data []byte)

func (*BorlandRandKeyGenerator) MangleIndex 

func (g *BorlandRandKeyGenerator) MangleIndex() uint32

type DeviceId 

type DeviceId [3]uint32

type EncryptedBlock 

type EncryptedBlock []byte

func NewEncryptedBlock 

func NewEncryptedBlock(size int) EncryptedBlock

func (EncryptedBlock) CRC 

func (b EncryptedBlock) CRC() (crc1, crc2 uint32)

func (EncryptedBlock) DataBlock 

func (b EncryptedBlock) DataBlock() []byte

func (EncryptedBlock) Decrypt 

func (b EncryptedBlock) Decrypt(material KeyMaterial, verifyCrc bool) (err error)

func (EncryptedBlock) Encrypt 

func (b EncryptedBlock) Encrypt(material KeyMaterial) error

func (EncryptedBlock) KeyBlock 

func (b EncryptedBlock) KeyBlock() []byte

func (EncryptedBlock) MangleIndex 

func (b EncryptedBlock) MangleIndex() uint32

func (EncryptedBlock) MangleKey 

func (b EncryptedBlock) MangleKey() MangleKeyData

func (EncryptedBlock) MangleKeyBlock 

func (b EncryptedBlock) MangleKeyBlock() []byte

MangleKeyBlock Includes inner MangleKeyData and CRC1, CRC2

func (EncryptedBlock) Reset 

func (b EncryptedBlock) Reset()

type KeyGenerator 

type KeyGenerator interface {
	FillKeyBlock(data []byte)
	MangleIndex() uint32
}

func NewMangleIndexGeneratorWrapper 

func NewMangleIndexGeneratorWrapper(generator KeyGenerator, mangleIndex uint32) KeyGenerator

func NewMangleIndexOffsetGeneratorWrapper 

func NewMangleIndexOffsetGeneratorWrapper(generator KeyGenerator, offset uint32) KeyGenerator

type KeyMaterial 

type KeyMaterial struct {
	// Generator Random source to generate the inline material
	Generator         KeyGenerator
	OuterKeyOffset    OuterMangleKeyOffset
	DeviceKey         *MangleKeyData
	AlternateKeyTable *MangleKeyTable

	// CRC method to calculate CRC. If none is set, default is used.
	CRC func(data []byte) uint32
}

func NewFlashKeyMaterial 

func NewFlashKeyMaterial(generator KeyGenerator) KeyMaterial

func NewMemoryKeyMaterial 

func NewMemoryKeyMaterial(generator KeyGenerator) KeyMaterial

type MangleKeyData 

type MangleKeyData [MangleKeyDataSize]byte

MangleKeyData Key entries of 128-bit length

func DeviceMangleKeyOffset0 

func DeviceMangleKeyOffset0(deviceId DeviceId) *MangleKeyData

func DeviceMangleKeyOffset6 

func DeviceMangleKeyOffset6(deviceId DeviceId) *MangleKeyData

func (MangleKeyData) Decrypt 

func (d MangleKeyData) Decrypt(data []byte)

func (MangleKeyData) DecryptBlock 

func (d MangleKeyData) DecryptBlock(block uint64) uint64

func (MangleKeyData) Encrypt 

func (d MangleKeyData) Encrypt(data []byte)

func (MangleKeyData) EncryptBlock 

func (d MangleKeyData) EncryptBlock(block uint64) uint64

func (MangleKeyData) RoundKey 

func (d MangleKeyData) RoundKey(round int) uint32

type MangleKeyTable 

type MangleKeyTable [8]MangleKeyData

type OuterMangleKeyOffset 

type OuterMangleKeyOffset int

type SecureRandomKeyGenerator 

type SecureRandomKeyGenerator struct{}

SecureRandomKeyGenerator Generates random numbers using the system secure random number generator

func (*SecureRandomKeyGenerator) FillKeyBlock 

func (g *SecureRandomKeyGenerator) FillKeyBlock(data []byte)

func (*SecureRandomKeyGenerator) MangleIndex 

func (g *SecureRandomKeyGenerator) MangleIndex() uint32

type ZeroKeyGenerator 

type ZeroKeyGenerator struct{}

ZeroKeyGenerator Always outputs zero

func (*ZeroKeyGenerator) FillKeyBlock 

func (g *ZeroKeyGenerator) FillKeyBlock(data []byte)

func (*ZeroKeyGenerator) MangleIndex 

func (g *ZeroKeyGenerator) MangleIndex() uint32

Source Files

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