thaliaarchi/gocipher

A Go library implementing many classical ciphers

gocipher

gocipher is a collection of classical ciphers and cryptanalysis tools. gocipher is not cryptographically secure. Algorithms do not use constant-time operations and are thus susceptible to timing attacks.

Classical ciphers

• Alberti cipher | dCode

• ✔ Atbash cipher | dCode | Practical Cryptography | Rumkin.com

• AMSCO cipher | dCode

• Autokey cipher | Practical Cryptography

• Baconian cipher | dCode | Practical Cryptography | Rumkin.com

• Jefferson disk / Bazeries cylinder, M-94 | dCode

• Scytale cipher | dCode

• Monoaplhabetic substitution cipher (simple substitution) | dCode | Practical Cryptography | Rumkin.com

  • ✔ Affine cipher | dCode | Practical Cryptography | Rumkin.com
  • ✔ Caesar cipher | dCode | Practical Cryptography | Rumkin.com
  • Keyboard Coordinates | dCode
  • Keyboard Shift cipher | dCode
  • ✔ Keyed caesar cipher | Rumkin.com
  • Letter-to-number | dCode | Rumkin.com
  • ✔ Morse Code | dCode | Rumkin.com
    • Wabun Code | dCode
  • Music Notes | dCode
  • ✔ ROT cipher | dCode
  • ✔ ROT-5 | dCode | Web Utils
  • ✔ ROT-13 | dCode | Practical Cryptography | Rumkin.com | Web Utils
  • ✔ ROT-18 | Web Utils
  • ✔ ROT-47 | dCode | Web Utils
  • Shift cipher | dCode
  • Trifid cipher | dCode | Practical Cryptograpgy

• Homophonic Substitution cipher | Practical Cryptography

  • Beale ciphers
  • Book cipher | dCode
  • Straddling checkerboard cipher | Practical Cryptography
  • Trithemius Ave Maria | dCode

• Alphabetical Ranks Added | dCode

• Bellaso cipher | dCode

• Bifid cipher | dCode | Practical Cryptography | Rumkin.com

• Caesar Box cipher | dCode

• Cardan Grille | dCode

• Chaocipher | dCode

• Chinese Code | dCode

• Codes and Nomenclators cipher | Practical Cryptography

• Columnar Transposition | Practical Cryptography | Rumkin.com

  • Double Transposition | Rumkin.com | dCode
  • Übchi | Rumkin.com

• Consonants/Vowels Rank cipher | dCode

• Deranged Alphabet cipher | dCode

• Four-Square cipher | Practical Cryptography

• ✔ Fractionated Morse cipher | dCode | Practical Cryptography

• Gold Bug cipher | dCode

• Hill cipher | dCode | Practical Cryptography

• Ideograms cipher | dCode

• LSPK90 Clockwise | dCode

• Mexican Army cipher wheel | dCode

• Modulo cipher | dCode

• Navajo Code | dCode

• ✔ One Time Pad | Rumkin.com

• Playfair cipher | dCode | Practical Cryptography | Rumkin.com

  • Two Square cipher dCode

• ✔ Polybius square | dCode | Practical Cryptography

  • ADFGVX cipher | dCode | Practical Cryptography
  • ADFGX cipher | dCode | Practical Cryptography
  • Nihilist cipher | dCode

• Porta cipher | Practical Cryptography

• ✔ Rail-fence (ZigZag) cipher | dCode | Practical Cryptography | Rumkin.com

  • Redefence cipher | dCode

• Rotate | Rumkin.com

• Running Key cipher | Practical Cryptography

• Skip | Rumkin.com

• URL encode | Web Utils

• Vigenère cipher | dCode | Practical Cryptography | Rumkin.com

  • Beaufort cipher | dCode | Practical Cryptography
    • Variant Beaufort cipher dCode
  • Gronsfeld cipher | dCode | Practical Cryptograhy | Rumkin.com
  • Keyed Vigenère cipher | Rumkin.com
  • Multiplication Vigenère cipher | dCode
  • ✔ Trithemius cipher | dCode
  • Vernam cipher | dCode
  • Vigenère autokey cipher (autoclave cipher) | dCode | Rumkin.com

• XOR cipher | dCode

Mechanical ciphers

• Enigma cipher | dCode | Practical Cryptography
• Lorenz cipher | Practical Cryptography
• M-209
• SIGABA

Binary-to-text encoding

• Ascii85 | dCode | Web Utils
• Base16
• Base32
• Base58
• Base64 | dCode | Rumkin.com | Wikibooks
• Base91 | dCode
• UUEncode | dCode | Web Utils
• XXEncode | Web Utils

Bases

• Base 2 <-> Base 10 | dCode
• Base 26 <-> Base 10 | dCode

Barcodes

• Code 39 | dCode
• Code 128 | dCode

Symmetric key encryption

• RC2
• ✔ RC4
  • ✔ RC4A
  • VMPC (Variably Modified Permutation Composition)
  • RC4+
  • Spritz
• RC5
• RC6

Public key

• RSA

Hash functions

• HAVAL | Web Utils
• MD2
• MD4
• MD5 | dCode | Web Utils
• MD6
• RIPEMD | Web Utils
• SHA-0
• SHA-1 | dCode | Web Utils
• SHA-2
• SHA-3
• Tiger | Web Utils

Graphical

• Acéré cipher | dCode
• Music Sheet cipher | dCode
• Pigpen cipher | dCode
• Templars cipher | dCode

Algoriothms

• Benford's Law | dCode
• Frequency Analysis | dCode | Rumkin.com
• Index of Coincidence | dCode
• Middle squares method for pseurorandom number generation

Utilities

• Characters Type | dCode
• Charset Converter | Web Utils
• Crypt | Web Utils
• Crypto Solver | Rumkin.com
• Cryptogram Assistant | Rumkin.com
• Isogram Generator | dCode
• Text Manipulator | Rumkin.com
• Word Desubstitution | dCode

Lists

• dCode
• Practical Cryptography
• Rumkin.com
• Web Utils
• Binary-to-text encoding on Wikipedia

Libraries

• Caesar Salad (JavaScript)
• cipher-machines (Go)
• CryptoJS (JavaScript)

gocipher's Issues

Do More RC4-related ciphers

There are 20 versions of arc4 in https://eprint.iacr.org/2014/315 which you could try and implement as they are all unique in their own way.

Ngram text files not properly referenced when used as a library

After installing gocipher (via "go get" and "go build"), for it to work, a symlink needs to be created from the ngrams/ dir to the place where the gocipher library is used. This needs to be fixed to not rely on a symlink for portability.

$ go run affinetest.go
panic: error opening file "ngrams/english_1-grams.txt": open ngrams/english_1-grams.txt: no such file or directory

goroutine 1 [running]:
github.com/andrewarchi/gocipher/gocipher.LoadNgrams(0x10de633, 0x7, 0x1, 0x54)
	/Users/kbouley/projects/go/src/github.com/andrewarchi/gocipher/gocipher/ngrams.go:66 +0x9e8
github.com/andrewarchi/gocipher/gocipher.init()
	/Users/kbouley/projects/go/src/github.com/andrewarchi/gocipher/gocipher/ngrams.go:12 +0x425
main.init()
	<autogenerated>:1 +0x50
exit status 2

I was kindly notified of this issue by Kris Boulez.