cryptanalysis

package module

v0.0.0-...-e3bf4aa Latest Latest Go to latest Published: Sep 23, 2017 License: BSD-3-Clause Imports: 8 Imported by: 0

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Repository

github.com/asggo/cryptanalysis

README ¶

cryptanalysis

Go package to perform common cryptanalysis functions.

Documentation ¶

Index ¶

Variables
func BreakCaesarShift(cipher string, chi AlphabetFrequency) (float64, int, string)
func BreakSingleByteXor(data []byte, chi AlphabetFrequency) (float64, byte, string)
func BytesToInt(array []byte) (uint64, error)
func CaesarShift(data string, shift int) string
func Chunk(data []byte, size int) [][]byte
func DecodeB64Str(data string) []byte
func DecodeHexStr(data string) []byte
func DecryptCbc(ciphertext, key, iv []byte) ([]byte, error)
func DecryptEcb(ciphertext, key []byte) ([]byte, error)
func EncodeB64Str(data []byte) string
func EncodeHexStr(data []byte) string
func EncryptCbc(plaintext, key, iv []byte) ([]byte, error)
func EncryptEcb(plaintext, key []byte) ([]byte, error)
func EncryptXor(plain, key []byte) []byte
func Hamming(s1, s2 []byte) (int, error)
func KeyLength(data []byte) (int, error)
func PadPkcs7(data []byte, block_size int) []byte
func RandomBytes(size int) ([]byte, error)
func RandomIntRange(start, end uint64) (uint64, error)
func ScoreAlphabet(data string, chi AlphabetFrequency) float64
func ScoreEcb(data []byte, block_size int) float64
func Transpose(data [][]byte) [][]byte
func XorArrayByte(b1 []byte, b2 byte) []byte
func XorArrays(b1, b2 []byte) ([]byte, error)
func XorBytes(b1, b2 byte) byte
type AlphabetFrequency

Constants ¶

This section is empty.

Variables ¶

View Source

var ChiAlpha = AlphabetFrequency{
	Alphabet: "abcdefghijklmnopqrstuvwxyz",
	Frequency: map[rune]float64{
		'a': 0.08167, 'b': 0.01492, 'c': 0.02782, 'd': 0.04253, 'e': 0.12702,
		'f': 0.02228, 'g': 0.02015, 'h': 0.06094, 'i': 0.06966, 'j': 0.00153,
		'k': 0.00772, 'l': 0.04025, 'm': 0.02406, 'n': 0.06749, 'o': 0.07507,
		'p': 0.01929, 'q': 0.00095, 'r': 0.05987, 's': 0.06327, 't': 0.09056,
		'u': 0.02758, 'v': 0.00978, 'w': 0.02360, 'x': 0.00150, 'y': 0.01974,
		'z': 0.00074},
}

View Source

var ChiAlphaSpace = AlphabetFrequency{
	Alphabet: "abcdefghijklmnopqrstuvwxyz ",
	Frequency: map[rune]float64{
		'a': 0.08167, 'b': 0.01492, 'c': 0.02782, 'd': 0.04253, 'e': 0.12702,
		'f': 0.02228, 'g': 0.02015, 'h': 0.06094, 'i': 0.06966, 'j': 0.00153,
		'k': 0.00772, 'l': 0.04025, 'm': 0.02406, 'n': 0.06749, 'o': 0.07507,
		'p': 0.01929, 'q': 0.00095, 'r': 0.05987, 's': 0.06327, 't': 0.09056,
		'u': 0.02758, 'v': 0.00978, 'w': 0.02360, 'x': 0.00150, 'y': 0.01974,
		'z': 0.00074, ' ': 0.23200},
}

Functions ¶

func BreakCaesarShift ¶

func BreakCaesarShift(cipher string, chi AlphabetFrequency) (float64, int, string)

func BreakSingleByteXor ¶

func BreakSingleByteXor(data []byte, chi AlphabetFrequency) (float64, byte, string)

func BytesToInt ¶

func BytesToInt(array []byte) (uint64, error)

func CaesarShift ¶

func CaesarShift(data string, shift int) string

func Chunk ¶

func Chunk(data []byte, size int) [][]byte

func DecodeB64Str ¶

func DecodeB64Str(data string) []byte

func DecodeHexStr ¶

func DecodeHexStr(data string) []byte

func DecryptCbc ¶

func DecryptCbc(ciphertext, key, iv []byte) ([]byte, error)

func DecryptEcb ¶

func DecryptEcb(ciphertext, key []byte) ([]byte, error)

func EncodeB64Str ¶

func EncodeB64Str(data []byte) string

func EncodeHexStr ¶

func EncodeHexStr(data []byte) string

func EncryptCbc ¶

func EncryptCbc(plaintext, key, iv []byte) ([]byte, error)

func EncryptEcb ¶

func EncryptEcb(plaintext, key []byte) ([]byte, error)

func EncryptXor ¶

func EncryptXor(plain, key []byte) []byte

func Hamming ¶

func Hamming(s1, s2 []byte) (int, error)

func KeyLength ¶

func KeyLength(data []byte) (int, error)

func PadPkcs7 ¶

func PadPkcs7(data []byte, block_size int) []byte

func RandomBytes ¶

func RandomBytes(size int) ([]byte, error)

func RandomIntRange ¶

func RandomIntRange(start, end uint64) (uint64, error)

Return a random integer in the range [start, end)

func ScoreAlphabet ¶

func ScoreAlphabet(data string, chi AlphabetFrequency) float64

func ScoreEcb ¶

func ScoreEcb(data []byte, block_size int) float64

func Transpose ¶

func Transpose(data [][]byte) [][]byte

func XorArrayByte ¶

func XorArrayByte(b1 []byte, b2 byte) []byte

func XorArrays ¶

func XorArrays(b1, b2 []byte) ([]byte, error)

func XorBytes ¶

func XorBytes(b1, b2 byte) byte

Types ¶

type AlphabetFrequency ¶

type AlphabetFrequency struct {
	Alphabet  string
	Frequency map[rune]float64
}

Source Files ¶

View all Source files

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