Documentation
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Overview ¶
Package xiao implements the Xiao-Lai white-box AES construction. There is an attack on this construction implemented in the cryptanalysis/xiao package.
The interface here is very similar to the one presented in the constructions/chow package. Chow's construction is based exclusively on representing encryption with randomized lookup tables. Xiao-Lai's construction interleaves randomized lookup tables and large linear transformations.
"A Secure Implementation of White-Box AES" by Yaying Xiao and Xuejia Lai, http://ieeexplore.ieee.org/xpl/login.jsp?arnumber=5404239
Index ¶
- type Construction
- func GenerateDecryptionKeys(key, seed []byte, opts common.KeyGenerationOpts) (out Construction, inputMask, outputMask matrix.Matrix)
- func GenerateEncryptionKeys(key, seed []byte, opts common.KeyGenerationOpts) (out Construction, inputMask, outputMask matrix.Matrix)
- func Parse(in []byte) (constr Construction, err error)
- func (constr Construction) BlockSize() int
- func (constr Construction) Decrypt(dst, src []byte)
- func (constr Construction) Encrypt(dst, src []byte)
- func (constr *Construction) ExpandWord(tmc []table.DoubleToWord, word []byte) [2][4]byte
- func (constr *Construction) Serialize() []byte
- func (constr *Construction) SquashWords(words [2][4]byte, dst []byte)
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Construction ¶
type Construction struct {
ShiftRows [10]matrix.Matrix
TBoxMixCol [10][8]table.DoubleToWord
FinalMask matrix.Matrix
}
func GenerateDecryptionKeys ¶
func GenerateDecryptionKeys(key, seed []byte, opts common.KeyGenerationOpts) (out Construction, inputMask, outputMask matrix.Matrix)
GenerateDecryptionKeys creates a white-boxed version of the AES key `key` for decryption, with any non-determinism generated by `seed`.
func GenerateEncryptionKeys ¶
func GenerateEncryptionKeys(key, seed []byte, opts common.KeyGenerationOpts) (out Construction, inputMask, outputMask matrix.Matrix)
GenerateEncryptionKeys creates a white-boxed version of the AES key `key` for encryption, with any non-determinism generated by `seed`.
func Parse ¶
func Parse(in []byte) (constr Construction, err error)
Parse parses a byte array into a white-box construction. It returns an error if the byte array isn't long enough.
func (Construction) BlockSize ¶
func (constr Construction) BlockSize() int
BlockSize returns the block size of AES. (Necessary to implement cipher.Block.)
func (Construction) Decrypt ¶
func (constr Construction) Decrypt(dst, src []byte)
Decrypt decrypts the first block in src into dst. Dst and src may point at the same memory.
func (Construction) Encrypt ¶
func (constr Construction) Encrypt(dst, src []byte)
Encrypt encrypts the first block in src into dst. Dst and src may point at the same memory.
func (*Construction) ExpandWord ¶
func (constr *Construction) ExpandWord(tmc []table.DoubleToWord, word []byte) [2][4]byte
func (*Construction) Serialize ¶
func (constr *Construction) Serialize() []byte
Serialize serializes a white-box construction into a byte slice.
func (*Construction) SquashWords ¶
func (constr *Construction) SquashWords(words [2][4]byte, dst []byte)
Source Files