patrick/ClassicalCiphers.jl
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Make crack_cipher outputs consistent for different ciphers

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Smaug123
2016-01-16 21:45:40 +00:00
parent aebd353646
commit d3b54be6ed
5 changed files with 11 additions and 9 deletions
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6
README.md
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@@ -62,7 +62,7 @@ Encrypt the text "Hello, World!" with the function `x -> 3x+4`:
```julia
encrypt_affine("Hello, World!", 3, 4)
# outputs
# outputs "ZQLLU, SUDLN!"
```
Notice that `encrypt_affine` turns everything upper-case, but retains symbols.
@@ -81,7 +81,7 @@ Crack the same text:
```julia
crack_affine("ZQLLU, SUDLN!")
# outputs ((3, 4), "hello, world!")
# outputs ("hello, world!", (3, 4))
```
You can provide `mult=` or `add=` options to `crack_affine`, if they are known,
@@ -118,7 +118,7 @@ It simply makes all specified changes, and leaves the rest of the string unchang
Cracking a cipher:
```julia
crack_monoalphabetic(str, chatty=0, rounds=10)
# outputs (key, decrypted_string)
# outputs (decrypted_string, key)
```
The various optional arguments to `crack_monoalphabetic` are:

2
src/affine.jl
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@@ -61,5 +61,5 @@ function crack_affine(ciphertext; mult=0, add=-1)
sort!(decrypts, by=(x -> string_fitness(x[2])))
decrypts[end]
reverse(decrypts[end])
end

2
src/monoalphabetic.jl
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@@ -172,6 +172,6 @@ function crack_monoalphabetic(ciphertext; starting_key="",
println("Best was $(total_best_key) at $(total_best_fitness)")
println(total_best_decrypt)
end
(key, decrypt_monoalphabetic(ciphertext, key))
(decrypt_monoalphabetic(ciphertext, key), key)
end

8
test/affine.jl
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@@ -5,7 +5,7 @@ using Base.Test
@test encrypt_affine("Hello, World!", 3, 4) == "ZQLLU, SUDLN!"
@test decrypt_affine("ZQLLU, SUDLN!", 3, 4) == "hello, world!"
@test crack_affine("zqllu, sudln!") == ((3, 4), "hello, world!")
@test crack_affine("zqllu, sudln!") == ("hello, world!", (3, 4))
# Wikipedia examples
@@ -16,7 +16,7 @@ using Base.Test
@test encrypt_affine("defend the east wall of the castle", 5, 7) == uppercase("wbgbuw yqb bhty nhkk zg yqb rhtykb")
@test decrypt_affine("wbgbuwyqbbhtynhkkzgyqbrhtykb", 5, 7) == "defendtheeastwallofthecastle"
@test crack_affine("wbgbuwyqbbhtynhkkzgyqbrhtykb") == ((5, 7), "defendtheeastwallofthecastle")
@test crack_affine("wbgbuwyqbbhtynhkkzgyqbrhtykb") == ("defendtheeastwallofthecastle", (5, 7))
@test crack_affine("wbgbuwyqbbhtynhkkzgyqbrhtykb", mult=5) == ((5, 7), "defendtheeastwallofthecastle")
@test crack_affine("wbgbuwyqbbhtynhkkzgyqbrhtykb", add=7) == ((5, 7), "defendtheeastwallofthecastle")
@test crack_affine("wbgbuwyqbbhtynhkkzgyqbrhtykb", mult=5) == ("defendtheeastwallofthecastle", (5, 7))
@test crack_affine("wbgbuwyqbbhtynhkkzgyqbrhtykb", add=7) == ("defendtheeastwallofthecastle", (5, 7))

2
test/playfair.jl
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@@ -12,6 +12,8 @@ using Base.Test
@test (arr = ['P' 'L' 'A' 'Y' 'F'; 'I' 'R' 'E' 'X' 'M'; 'B' 'C' 'D' 'G' 'H'; 'K' 'N' 'O' 'Q' 'S'; 'T' 'U' 'V' 'W' 'Z'];
encrypt_playfair("Hello, World!", arr) == "DMYRANVQCRGE")
@test encrypt_playfair("HELXLOWORLD", "PLAYFIREXM") == "DMYRANVQCRGE"
@test encrypt_playfair("IJXYZA", "PLAYFIREXM", combined=('I', 'J')) == "RMRMFWYE"
@test encrypt_playfair("IJXYZA", "PLAYFIREXM", combined=('X', 'Z')) == "BSGXEY"